1
|
Souza ABR, Cruz AD, Aguiar MF. Age estimation by volumetric analysis of teeth using cone beam computed tomography. Oral Radiol 2024:10.1007/s11282-024-00750-w. [PMID: 38589600 DOI: 10.1007/s11282-024-00750-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 03/18/2024] [Indexed: 04/10/2024]
Abstract
OBJECTIVES To evaluate the feasibility of using the pulp volume (Pv) to total volume (Tv) ratio (Pv:Tv), obtained from cone beam computed tomography (CBCT) scans of single-rooted teeth, for age estimation in a Brazilian population sample. METHODS After obtaining approval from the ethics committee, the study commenced by applying inclusion criteria to screen CBCT scans, resulting in a probability-based sample of participants aged 18 years and older (ranging from 18 to 82 years, with a mean age of 46.44 years). A total of 517 single-rooted teeth, including maxillary central incisors (CI), mandibular canines (C), and mandibular first premolars (FP), were chosen based on excellent agreement values (> 0.9). Pv and Tv measurements were conducted using semi-automatic segmentation with ITK-SNAP 3.8 software. Statistical analysis was performed using Jamovi software, with a significance level set at 5% (α = 0.05). RESULTS A strong negative correlation (r > -0.7) was observed between chronological age and the Pv:Tv ratio across all examined teeth. However, when conducting regression analysis with Pv:Tv data and chronological age as the independent variable, only the mandibular FP teeth exhibited a normal distribution. The resulting linear model demonstrated moderate predictive value (approximately 64%) in explaining the variance in chronological age, but caution should be exercised when interpreting these findings. CONCLUSIONS The method of measuring individual tooth volume using CBCT to estimate chronological age via Pv:Tv has been demonstrated as effective and reproducible within the Brazilian population sample.
Collapse
Affiliation(s)
- Ana Beatriz Raposo Souza
- Graduate Program in Dentistry, Fluminense Federal University, Health Institute of Nova Friburgo, Nova Friburgo, RJ, Brazil
| | - Adriana Dibo Cruz
- Graduate Program in Dentistry, Fluminense Federal University, Health Institute of Nova Friburgo, R. DR. Silvio Henrique Braune, 22 Centro, Nova Friburgo, RJ, CEP: 28625-650, Brazil.
| | - Marcelo Freitas Aguiar
- Department of Specific Formation, Fluminense Federal University, Health Institute of Nova Friburgo, Nova Friburgo, RJ, Brazil
| |
Collapse
|
2
|
Serin Canpolat S, Bayrak S. Evaluation of radiographic visibility of root pulp in mandibular second molars using cone beam computed tomography images for age estimation. Forensic Sci Med Pathol 2024; 20:8-13. [PMID: 36853501 DOI: 10.1007/s12024-023-00594-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/13/2023] [Indexed: 03/01/2023]
Abstract
The purpose of this study is to estimate chronological age and determine whether individuals were aged under or over 18 years using root pulp visibility (RPV) in cone-beam computed tomography (CBCT) images. The study included CBCT images of 699 individuals aged between 15 and 75 years. One thousand twenty-three mandibular second molar (2M) teeth were evaluated using Olze's RPV method in four stages. Descriptive statistics of the stages and the relationship between the stages and the chronological age were assessed. The distribution of the stages was analyzed according to the 18-year age threshold. There was a positive correlation between RPV stages and chronological ages in both sexes. For females and males, the mean ages of stage 0, stage 1, and stage 2, for females and males, were found as 27.21, 28.93, and 33.68 years, and 37.69, 40.9, and 44.88 years, respectively. Stage 0 and stage 1 were found both in individuals aged under and over 18 years, and stage 2 and stage 3 were not observed in individuals aged under 18 years. The presence of stage 2 and stage 3 may be an indication that an individual is aged over 18 years according to Olze's RPV age estimation method. For more reliable results, 2M teeth should be examined bilaterally in forensic science.
Collapse
Affiliation(s)
- S Serin Canpolat
- Faculty of Dentistry, Department of Dentomaxillofacial Radiology, Bolu Abant Izzet Baysal University, Golkoy, Bolu, Turkey.
| | - S Bayrak
- Faculty of Dentistry, Department of Dentomaxillofacial Radiology, Bolu Abant Izzet Baysal University, Golkoy, Bolu, Turkey
| |
Collapse
|
3
|
Timme M, Viktorov J, Steffens L, Streeter A, Karch A, Schmeling A. Dental age assessment in the living: a comparison of two common stage classifications for assessing radiographic visibility of the root canals in mandibular third molars. Int J Legal Med 2024; 138:499-507. [PMID: 37952073 PMCID: PMC10861756 DOI: 10.1007/s00414-023-03121-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Accepted: 10/26/2023] [Indexed: 11/14/2023]
Abstract
After dentition is complete, degenerative tooth characteristics can be used for dental age assessment. Radiological assessment of the visibility of the root canals of the mandibular third molars in dental panoramic radiographs (DPRs) is known to be one such suitable feature. Essentially, two different stage classifications are available for evaluating the visibility of the root canals of mandibular third molars in the DPR. The aim of this study was to determine if one method outperforms the other. Therefore, the 2010 method of Olze et al. was directly compared to the 2017 method of Lucas et al. in the 2020 modification of Al Qattan et al. To this end, 233 DPRs from 116 females and 117 males aged 20.0 to 40.9 years were evaluated by three independent experienced examiners. In addition, one examiner ran two independent evaluations. Correlation between age and stage was investigated, and the inter- and intra-rater reliability was estimated for both methods. Correlation between age and stage was higher with the Olze method (Spearman rho 0.388 [95% CI 0.309, 0.462], males and 0.283 [95% CI 0.216, 0.357], females) than the Lucas method (0.212 [95% CI 0.141, 0.284], males and 0.265 [95% CI 0.193, 0.340], females). The intra-rater repeatability of the Olze method (Krippendorff's α = 0.576 [95% CI 0.508, 0.644], males and α = 0.592 [95% CI 0.523, 0.661], females) was greater than that for the Lucas method (intra-rater α = 0.422 [95% CI 0.382, 0.502], males and α = 0.516 [95% CI 0.523, 0.661], females). Inter-rater reproducibility was also greater for the Olze method (α = 0.542 [95% CI 0.463, 0.620], males and α = 0.533 [95% CI 0.451, 0.615], females) compared to the Lucas method (α = 0.374 [95% CI 0.304, 0.443], males and α = 0.432 [95% CI 0.359, 0.505], females). The method of Olze et al. was found to present marginal advantages to the Lucas et al. method across all examinations and may be a more appropriate method for application in future studies.
Collapse
Affiliation(s)
- Maximilian Timme
- Institute of Legal Medicine, University Hospital Münster, Röntgenstraße 23, 48149, Münster, Germany.
| | - Jan Viktorov
- Institute of Legal Medicine, University Hospital Münster, Röntgenstraße 23, 48149, Münster, Germany
| | - Laurin Steffens
- Institute of Legal Medicine, University Hospital Münster, Röntgenstraße 23, 48149, Münster, Germany
| | - Adam Streeter
- Institute of Epidemiology and Social Medicine, University of Münster, Domagkstraße 3, 48149, Münster, Germany
| | - André Karch
- Institute of Epidemiology and Social Medicine, University of Münster, Domagkstraße 3, 48149, Münster, Germany
| | - Andreas Schmeling
- Institute of Legal Medicine, University Hospital Münster, Röntgenstraße 23, 48149, Münster, Germany
| |
Collapse
|
4
|
Kazmi S, Zaidi SJA, Reesu GV, Shepherd S. Dental age estimation using the Kvaal method-an evaluation of length and width ratios: a systematic review. Forensic Sci Med Pathol 2024; 20:239-248. [PMID: 36773212 PMCID: PMC10944388 DOI: 10.1007/s12024-023-00575-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/03/2023] [Indexed: 02/12/2023]
Abstract
This study aimed to systematically review the correlational accuracy between width ratios and length ratios based on the Kvaal methodology with chronological age. This systematic review followed Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA). The search strategy included ProQuest, PubMed, Science Direct, and Taylor and Francis and Willey online without time or language restriction using Kvaal method of age estimation as key words for the search up to December 2021. A team of two researchers independently selected the studies and extracted the data. The Covidence platform was used to systematically organize all titles. The full texts of eligible studies were analyzed. Risk of bias (RoB) was assessed using a modified (to the specific characteristics of this systematic review) checklist based on Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) statement checklist for observational studies. A total of 658 articles were initially reviewed, but 22 were selected for inclusion. The risk of bias was estimated to be unclear to low overall. Among the length ratios, ratio R showed a strong association with chronological age, followed by ratio P. For the width ratios, ratio B demonstrated a close association with chronological age, followed by ratio C. The results suggest that width ratios correlate better with chronological age than length ratios. This systematic review suggests the width ratios are more strongly associated with chronological age than the length ratios. Using a width ratio could serve as a convenient and rapid way to estimate dental age. Our results apply equally to all types of ethnic groups.
Collapse
Affiliation(s)
- S Kazmi
- Department of Oral Biology, School of Dentistry, Shaheed Zulfiqar Ali Bhutto Medical University, Islamabad, Pakistan.
| | - Syed Jaffar Abbas Zaidi
- Department of Oral Biology, Dow Dental College, Dow University of Health Sciences, Karachi, Pakistan
| | | | - Simon Shepherd
- Dundee Dental Hospital & Research School, University of Dundee, Park Place, Dundee, DD1 4HN, UK
| |
Collapse
|
5
|
Marques-Moura S, Caldas IM. Study of secondary dentine deposition in central incisors as an age estimation method for adults. Forensic Sci Med Pathol 2024:10.1007/s12024-024-00777-9. [PMID: 38332258 DOI: 10.1007/s12024-024-00777-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/02/2024] [Indexed: 02/10/2024]
Abstract
This work aimed to assess the pulp/tooth area ratio's utility in the upper central incisors using orthopantomograms. A convenience sample of 801 adult patient orthopantomograms was studied. Image J® software was used to measure the pulp/tooth area ratio, and a regression model was developed. Our results conclude that the methodology assessing upper incisors' pulp/tooth area ratio using orthopantomograms can lead to age overestimation and statistically significant differences between chronological and estimated age. For those over 50, no correlation between pulp/tooth area ratio and chronological age was found, suggesting that this may be the upper limit of this technique in this population. This methodology may not be suitable for age estimation, particularly in older adults.
Collapse
Affiliation(s)
- S Marques-Moura
- Department of Public Health and Forensic Sciences and Medical Education, Faculty of Medicine of the University of Porto, Al. Prof. Hernâni Monteiro, 4200-319, Porto, Portugal
| | - I M Caldas
- Faculty of Dental Medicine of the University of Porto, Rua Dr. Manuel Pereira da Silva, 4200-393, Porto, Portugal.
- CFE - Center for Functional Ecology - Science for People and the Planet (CFE), University of Coimbra, Coimbra, Portugal.
- 1H-TOXRUN - One Health Research Unit in Toxicology, University Institute of Health Sciences, CESPU, CRL, 4585-116, Gandra, Portugal.
| |
Collapse
|
6
|
Alamoudi RA. The Role of an Endodontist in Victim Identification: A Narrative Review on Forensic Endodontics. Cureus 2024; 16:e53391. [PMID: 38435194 PMCID: PMC10908307 DOI: 10.7759/cureus.53391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/01/2024] [Indexed: 03/05/2024] Open
Abstract
This narrative review highlights the role of endodontists and the significance of various dental tools in forensic dentistry. An online search was conducted in peer-reviewed journals, including MEDLINE (Ovid), PubMed, Web of Science, Scopus, and Google Scholar databases, to retrieve studies regarding "the role of an endodontist in victim identification using different tools". The searches used controlled vocabulary and free-text terms. Articles written in English and published from 1923 to 2023 were selected. An essential stage in forensic dentistry is dental identification of the dead person and is regarded as an initial step for both judicial and humanitarian purposes if fingerprint records are missing or the remains have undergone significant changes. Endodontists should be aware of all available dental tools that aid in identification. The four fundamental tools for identification are dental radiographs, hard and soft dental structures, and dental materials. Dental radiographs provide a substantial nondestructive record for estimating age and sex. Moreover, maxillofacial hard and soft structures provide important tools for individual identification as they are considered the strongest structures in the human body and can withstand severe chemical and temperature changes. In addition, endodontic and restorative materials can be identified under different conditions and serve as excellent forensic identification measures.
Collapse
Affiliation(s)
- Ruaa A Alamoudi
- Endodontics Department, Faculty of Dentistry, King Abdulaziz University, Jeddah, SAU
| |
Collapse
|
7
|
Lu T, Diao YR, Tang XE, Fan F, Peng Z, Zhan MJ, Liu GF, Lin YS, Cheng ZQ, Yi X, Wang YJ, Chen H, Deng ZH. Deep learning enables automatic adult age estimation based on CT reconstruction images of the costal cartilage. Eur Radiol 2023; 33:7519-7529. [PMID: 37231070 DOI: 10.1007/s00330-023-09761-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 03/19/2023] [Accepted: 04/03/2023] [Indexed: 05/27/2023]
Abstract
OBJECTIVE Adult age estimation (AAE) is a challenging task. Deep learning (DL) could be a supportive tool. This study aimed to develop DL models for AAE based on CT images and compare their performance to the manual visual scoring method. METHODS Chest CT were reconstructed using volume rendering (VR) and maximum intensity projection (MIP) separately. Retrospective data of 2500 patients aged 20.00-69.99 years were obtained. The cohort was split into training (80%) and validation (20%) sets. Additional independent data from 200 patients were used as the test set and external validation set. Different modality DL models were developed accordingly. Comparisons were hierarchically performed by VR versus MIP, single-modality versus multi-modality, and DL versus manual method. Mean absolute error (MAE) was the primary parameter of comparison. RESULTS A total of 2700 patients (mean age = 45.24 years ± 14.03 [SD]) were evaluated. Of single-modality models, MAEs yielded by VR were lower than MIP. Multi-modality models generally yielded lower MAEs than the optimal single-modality model. The best-performing multi-modality model obtained the lowest MAEs of 3.78 in males and 3.40 in females. On the test set, DL achieved MAEs of 3.78 in males and 3.92 in females, which were far better than the MAEs of 8.90 and 6.42 respectively, for the manual method. For the external validation, MAEs were 6.05 in males and 6.68 in females for DL, and 6.93 and 8.28 for the manual method. CONCLUSIONS DL demonstrated better performance than the manual method in AAE based on CT reconstruction of the costal cartilage. CLINICAL RELEVANCE STATEMENT Aging leads to diseases, functional performance deterioration, and both physical and physiological damage over time. Accurate AAE may aid in diagnosing the personalization of aging processes. KEY POINTS • VR-based DL models outperformed MIP-based models with lower MAEs and higher R2 values. • All multi-modality DL models showed better performance than single-modality models in adult age estimation. • DL models achieved a better performance than expert assessments.
Collapse
Affiliation(s)
- Ting Lu
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Ya-Ru Diao
- College of Computer Science, Sichuan University, Chengdu, 610064, People's Republic of China
| | - Xian-E Tang
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Fei Fan
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Zhao Peng
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Meng-Jun Zhan
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Guang-Feng Liu
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Yu-Shan Lin
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Zi-Qi Cheng
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, 610041, People's Republic of China
| | - Xu Yi
- Department of Radiology, Beidaihe Hospital, Qinhuangdao, Hebei, 066100, People's Republic of China
| | - Yu-Jun Wang
- Department of Radiology, Beidaihe Hospital, Qinhuangdao, Hebei, 066100, People's Republic of China
| | - Hu Chen
- College of Computer Science, Sichuan University, Chengdu, 610064, People's Republic of China.
| | - Zhen-Hua Deng
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, 610041, People's Republic of China.
| |
Collapse
|
8
|
Jadhav S, Jhaveri A, Pawar AM, Bhardwaj A, Vinay V, di Blasio M, Cicciù M, Minervini G. Estimation of Age implementing pulp tooth volume ratio in maxillary canines of an Indian population by means of CBCT scans. Technol Health Care 2023:THC230555. [PMID: 37955095 DOI: 10.3233/thc-230555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
BACKGROUND Forensic odontology is a subfield of forensics that can assist in determining age, gender, and other demographic factors. OBJECTIVE The focus of this research is to ascertain age by tooth volume ratio of permanent maxillary canines using a CBCT scan. METHODS In this retrospective investigation, 1000 CBCT images were gathered and focused on only fully developed maxillary canines. For each of the maxillary canines, the researchers measured and calculated the volume of the pulp chamber, root canal, and entire tooth using the ITK Snap programme. The pulp volume to tooth volume ratio was computed. The equation AGE = 59.208 - (583.652 x pulp volume/tooth volume) was then used to compute age. The samples were divided into 5 age groups; 13-20, 21-30, 31-40, 41-50, and 51-60. The age was calculated for samples in each group and it was compared to the actual age. RESULTS Between individuals' actual age and computed age, the study discovered a statistically significant positive association. While groups 3, 4, and 5 demonstrated positive but weaker correlations (r= 0.854, r= 0.658, and r= 0.612, respectively), groups 1 and 2 displayed statistically significant strong positive correlations (r= 0.987 and r= 0.923, respectively). The average total discrepancy between the age that was computed and the actual age was 2.45 1.344. CONCLUSION The study found a statistically significant positive correlation between computed age and actual age, with the younger age groups 1 (13-20) and 2 (21-30) showing the strongest relationships. This underlines its potential success in court, particularly when dealing with young criminals.
Collapse
Affiliation(s)
- Shreya Jadhav
- Department of Conservative Dentistry and Endodontics, Nair Hospital Dental College, Mumbai, India
- Department of Conservative Dentistry and Endodontics, Nair Hospital Dental College, Mumbai, India
| | - Aditi Jhaveri
- Department of Conservative Dentistry and Endodontics, Nair Hospital Dental College, Mumbai, India
- Department of Conservative Dentistry and Endodontics, Nair Hospital Dental College, Mumbai, India
| | - Ajinkya M Pawar
- Department of Conservative Dentistry and Endodontics, Nair Hospital Dental College, Mumbai, India
- Department of Conservative Dentistry and Endodontics, Nair Hospital Dental College, Mumbai, India
| | - Anuj Bhardwaj
- Department of Conservative Dentistry and Endodontics, College of Dental Sciences & Hospital, Indore, India
| | - Vineet Vinay
- Department of Public Health Dentistry, Sinhgad Dental College & Hospital, Pune, India
| | - Marco di Blasio
- University Center of Dentistry, Department of Medicine and Surgery, University of Parma, Parma, Italy
| | - Marco Cicciù
- Department of Biomedical and Surgical and Biomedical Sciences, Catania University, Catania, Italy
| | - Giuseppe Minervini
- Multidisciplinary Department of Medical-Sugical and Odontostomatological Specialties, University of Campania "Luigi Vanvitelli", Naples, Italy
- Saveetha Dental College & Hospitals, Saveetha Institute of Medical & Technical Sciences, Saveetha University, Chennai, India
| |
Collapse
|
9
|
Song Y, Yang H, Ge Z, Du H, Li G. Age estimation based on 3D pulp segmentation of first molars from CBCT images using U-Net. Dentomaxillofac Radiol 2023; 52:20230177. [PMID: 37427595 PMCID: PMC10552131 DOI: 10.1259/dmfr.20230177] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 05/17/2023] [Accepted: 06/02/2023] [Indexed: 07/11/2023] Open
Abstract
OBJECTIVE To train a U-Net model to segment the intact pulp cavity of first molars and establish a reliable mathematical model for age estimation. METHODS We trained a U-Net model by 20 sets of cone-beam CT images and this model was able to segment the intact pulp cavity of first molars. Utilizing this model, 239 maxillary first molars and 234 mandibular first molars from 142 males and 135 females aged 15-69 years old were segmented and the intact pulp cavity volumes were calculated, followed by logarithmic regression analysis to establish the mathematical model with age as the dependent variable and pulp cavity volume as the independent variable. Another 256 first molars were collected to estimate ages with the established model. Mean absolute error and root mean square error between the actual and the estimated ages were used to assess the precision and accuracy of the model. RESULTS The dice similarity coefficient of the U-Net model was 95.6%. The established age estimation model was [Formula: see text] (V is the intact pulp cavity volume of the first molars). The coefficient of determination (R2), mean absolute error and root mean square error were 0.662, 6.72 years, and 8.26 years, respectively. CONCLUSION The trained U-Net model can accurately segment pulp cavity of the first molars from three-dimensional cone-beam CT images. The segmented pulp cavity volumes could be used to estimate the human ages with reasonable precision and accuracy.
Collapse
Affiliation(s)
- Yangjing Song
- Department of Oral and Maxillofacial Radiology, Peking University School and Hospital of Stomatology; National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, China
| | - Huifang Yang
- Center of Digital Dentistry, Peking University School and Hospital of Stomatology & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, China
| | - Zhipu Ge
- Department of Radiology, Qingdao Stomatological Hospital Affiliated to Qingdao University, Qingdao, Shandong Province, China
| | - Han Du
- Shanghai Stomatological Hospital & School of Stomatology, Fudan University & Shanghai Key Laboratory of Craniomaxillofacial Development and Diseases, Fudan University, Shanghai, China
| | - Gang Li
- Department of Oral and Maxillofacial Radiology, Peking University School and Hospital of Stomatology; National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Beijing, China
| |
Collapse
|
10
|
Ems G, Severino L, Nisolle JF, Nicaise C, Lambrichts I, LoMonaco M, Bronckaers A, Hontoir F, Vandeweerd JM. Volumetry of ovine incisors dental pulp for further regenerative therapy. Anat Histol Embryol 2023; 52:770-777. [PMID: 37278128 DOI: 10.1111/ahe.12935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 05/23/2023] [Indexed: 06/07/2023]
Abstract
Mesenchymal stem cells (MSCs) are used for regenerative therapy. Dental pulp MSCs make extracted wisdom teeth a useful resource in humans. Preclinical validation of regenerative therapies requires large animal models such as the sheep. Since stem cells can be retrieved from the dental pulp of ovine incisors, the best age to extract a maximal volume of dental pulp needs to be defined. The objective of this ex vivo study was to quantify incisors dental pulp volume, in sheep of various age. Three jaws were dedicated to histology (one per age group); the others were imaged with a computed tomography scanner [3 years-old (n = 9), 4 (n = 3) and 6 (n = 5)]. The incisors dental pulp volume was measured after 3D reconstruction. Multiple linear regression showed that dental pulp volume of ovine incisors decreases with age (β-estimate = -3.3; p < 0.0001) and teeth position from the more central to the more lateral (β-estimate = -4.9; p = 0.0009). Weight was not a relevant variable in the regression model. The dental pulp volume ranged from 36.7 to 19.6 mm3 in 3-year-old sheep, from 23.6 to 11.3 in 4-year-old sheep, and from 19.4 to 11.5 in 6-year-old sheep. The pulp volume of the most central teeth (first intermediate) was significantly higher than the most lateral teeth (corner). Haematoxylin-Eosin-Safran of the whole incisors, and of isolated dental pulps demonstrated a similar morphology to that in humans. The first intermediate incisor of 3-year-old sheep should be selected preferentially in preclinical research to retrieve the highest volume of dental pulp.
Collapse
Affiliation(s)
- Guillaume Ems
- URVI (Unité de Recherche Vétérinaire Intégrée), Namur Research Institute for Life Sciences (NARILIS), Université de Namur, Namur, Belgium
| | - Leandra Severino
- URVI (Unité de Recherche Vétérinaire Intégrée), Namur Research Institute for Life Sciences (NARILIS), Université de Namur, Namur, Belgium
| | - Jean-François Nisolle
- CHU UCL NAMUR (Centre Hospitalier Universitaire-Université Catholique de Louvain-Namur), Godinne, Belgium
| | - Charles Nicaise
- LNR (Laboratoire Neurodégénérescence et Régénération), Namur Research Institute for Life Sciences (NARILIS), Université de Namur, Namur, Belgium
| | - Ivo Lambrichts
- Cardio & organ systems, BIOMED, Faculty of Medicine and Life Sciences, Hasselt University, Diepenbeek, Belgium
| | - Melissa LoMonaco
- Cardio & organ systems, BIOMED, Faculty of Medicine and Life Sciences, Hasselt University, Diepenbeek, Belgium
| | - Annelies Bronckaers
- Cardio & organ systems, BIOMED, Faculty of Medicine and Life Sciences, Hasselt University, Diepenbeek, Belgium
| | - Fanny Hontoir
- URVI (Unité de Recherche Vétérinaire Intégrée), Namur Research Institute for Life Sciences (NARILIS), Université de Namur, Namur, Belgium
| | - Jean-Michel Vandeweerd
- URVI (Unité de Recherche Vétérinaire Intégrée), Namur Research Institute for Life Sciences (NARILIS), Université de Namur, Namur, Belgium
| |
Collapse
|
11
|
Pereira de Sousa D, Diniz Lima E, Souza Paulino JA, dos Anjos Pontual ML, Meira Bento P, Melo DP. Age determination on panoramic radiographs using the Kvaal method with the aid of artificial intelligence. Dentomaxillofac Radiol 2023; 52:20220363. [PMID: 36988148 PMCID: PMC10170175 DOI: 10.1259/dmfr.20220363] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 02/23/2023] [Accepted: 02/24/2023] [Indexed: 03/30/2023] Open
Abstract
OBJECTIVES This study aimed to assess and compare age estimation on panoramic radiography using the Kvaal method and machine learning (ML). METHODS AND MATERIALS 554 panoramic radiographs were selected from a Brazilian practice. To estimate age using the Kvaal method, the following measurements were performed on the upper left central incisors and canines: tooth, pulp and root length; root and pulp width at three different levels: at the enamel-cementum junction (ECJ); midpoint between the enamel-cementum junction and; at the mid root level. For ML age estimation, radiomic, semantic and the radiomic-semantic attribute extractions were assessed. Nineteen semantic and 14 radiomic attributes and a single set of 33 semantic-radiomic attributes were extracted. Logistic Regression, Linear Regression, KNN, SVR, Decision Tree Reg, Random Forest Reg, Gradient Boost Reg e XG Boosting Reg were used for ML classification. For the Kvaal method, Mann-Whitney test, Spearman correlation coefficient, Student's t-test and linear regression with its respective coefficient of determination were used to estimate age and to assess data variability. RESULTS Mean absolute error (MAE) and standard error estimate (SEE) were assessed. For the Kvaal method, upper incisors presented higher precision than canines (R²: 0.335, SSE: 7.108). Males presented better MAE and SEE values (5.29,6.96) than females (5.69,7.37). The radiomic-semantic attributes presented superior precision (MAE: 4.77) than the radiomic and semantic (MAE: 5.23) attributes. The XG Boosting Reg classifier performed better than the other six assessed classifiers (MAE: 4.65). ML (MAE: 4.77 presented higher age estimation precision than the Kvaal method (MAE: 5.68). CONCLUSION The use of ML on panoramic radiographs can improve age estimation.
Collapse
Affiliation(s)
- Douglas Pereira de Sousa
- Department of Dentistry, State
University of Paraiba, Rua Baraúnas, 351, Bairro
Universitário, Campina Grande,
Paraíba, Brasil
| | - Elisa Diniz Lima
- Department of Dentistry, State
University of Paraiba, Rua Baraúnas, 351, Bairro
Universitário, Campina Grande,
Paraíba, Brasil
| | - José Alberto Souza Paulino
- Rua Aprígio Veloso, Federal
University of Campina Grande, RuAprígio Veloso, 882, Bairro
Universitário, Campina Grande,
Paraíba, Brazil
| | - Maria Luiza dos Anjos Pontual
- Department of Oral Diagnosis, Division
of Oral Radiology, Federal University of Pernambuco, Av. Prof. Artur de
Sá, 329-481 - CidadUniversitária,
Recife - PE, Brazil
| | - Patricia Meira Bento
- Department of Dentistry, State
University of Paraiba, Rua Baraúnas, 351, Bairro
Universitário, Campina Grande,
Paraíba, Brasil
| | - Daniela Pita Melo
- Department of Dentistry, State
University of Paraiba, Rua Baraúnas, 351, Bairro
Universitário, Campina Grande,
Paraíba, Brasil
| |
Collapse
|
12
|
Li Y, Qian F, Wang D, Wang Y, Wang W, Tian Y. Prevalence of taurodontism in individuals in Northwest China determined by cone-beam computed tomography images. Heliyon 2023; 9:e15531. [PMID: 37128323 PMCID: PMC10148092 DOI: 10.1016/j.heliyon.2023.e15531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 04/05/2023] [Accepted: 04/13/2023] [Indexed: 05/03/2023] Open
Abstract
Objective The aim of this retrospective study was to evaluate the prevalence of taurodontism in a group of adult dental patients in Northwest China with the aid of cone-beam computed tomography (CBCT). Methods This study used Shifman and Chanannel's criteria to statistically analyze the prevalence of taurodontism in the premolars and molars of the Chinese population. CBCT images of 5488 teeth from 580 subjects of Chinese origin were evaluated. The measured data were statistically analyzed and the chi-square test was also used to compare the prevalence of taurodontism between male and female subjects and between the upper and lower jaws (P < 0.05). Results Taurodontism was detected in 169 patients, with a prevalence of 29.14%, of which 27.24% were males and 30.65% were females. The chi-square test showed that there was no significant difference between males and females (P > 0.05). Taurodontism was found in 7.45% of all teeth examined. Taurodonts were significantly more common in the maxilla (9.06%) than in the mandible (5.15%) (P < 0.001), and the maxillary second molar (25.18%) was the most common tooth affected. According to morphology, hypotaurodonts were the most common (60.39%) among taurodontic teeth. Conclusions Taurodontism was relatively common in the Chinese population and was almost equally distributed between males and females. The maxillary second molar was the most common tooth of all taurodonts measured, and taurodonts were significantly more common in the maxilla than in the mandible. Hypotaurodontism was the most common form of taurodontism. Our study provides a reference for dental deformities in the Chinese population and the diagnosis and treatment of taurodontism.
Collapse
Affiliation(s)
- Yujiao Li
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Operative Dentistry and Endodontics, School of Stomatology, The Fourth Military Medical University, Xi’an, Shaanxi 710032, China
| | - Fei Qian
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an, Shaanxi 710032, China
| | - Dan Wang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Operative Dentistry and Endodontics, School of Stomatology, The Fourth Military Medical University, Xi’an, Shaanxi 710032, China
| | - Yirong Wang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Operative Dentistry and Endodontics, School of Stomatology, The Fourth Military Medical University, Xi’an, Shaanxi 710032, China
| | - Wei Wang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Operative Dentistry and Endodontics, School of Stomatology, The Fourth Military Medical University, Xi’an, Shaanxi 710032, China
- Corresponding author. Department of Operative Dentistry and Endodontics, School of Stomatology, the Fourth Military Medical University, NO.145, Changle Xi Road, Xi'an, Shaanxi 710032, China.
| | - Yu Tian
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Operative Dentistry and Endodontics, School of Stomatology, The Fourth Military Medical University, Xi’an, Shaanxi 710032, China
- Corresponding author. Department of Operative Dentistry and Endodontics, School of Stomatology, the Fourth Military Medical University, NO.145, Changle Xi Road, Xi'an, Shaanxi 710032, China.
| |
Collapse
|
13
|
Variational autoencoder-based estimation of chronological age and changes in morphological features of teeth. Sci Rep 2023; 13:704. [PMID: 36639691 PMCID: PMC9839705 DOI: 10.1038/s41598-023-27950-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Accepted: 01/10/2023] [Indexed: 01/15/2023] Open
Abstract
This study led to the development of a variational autoencoder (VAE) for estimating the chronological age of subjects using feature values extracted from their teeth. Further, it determined how given teeth images affected the estimation accuracy. The developed VAE was trained with the first molar and canine tooth images, and a parallel VAE structure was further constructed to extract common features shared by the two types of teeth more effectively. The encoder of the VAE was combined with a regression model to estimate the age. To determine which parts of the tooth images were more or less important when estimating age, a method of visualizing the obtained regression coefficient using the decoder of the VAE was developed. The developed age estimation model was trained using data from 910 individuals aged 10-79. This model showed a median absolute error (MAE) of 6.99 years, demonstrating its ability to estimate age accurately. Furthermore, this method of visualizing the influence of particular parts of tooth images on the accuracy of age estimation using a decoder is expected to provide novel insights for future research on explainable artificial intelligence.
Collapse
|
14
|
Rathore A, Puri N, Singh B, Kaur K, Singh B, Singh S. Mandibular Teeth as Predictors in Forensic Age Estimation: A Cone-Beam Computed Tomography-Based Pulp Volume Regression Study. Contemp Clin Dent 2023; 14:11-17. [PMID: 37249999 PMCID: PMC10209780 DOI: 10.4103/ccd.ccd_508_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 11/25/2021] [Accepted: 12/26/2021] [Indexed: 11/05/2022] Open
Abstract
Background Age estimation is integral to science of forensic odontology and plays an important role in human identification. Pulp volume estimation using cone-beam computed tomography (CBCT) to derive age can be very useful as it is noninvasive and can be applied on individuals of all ages. Aims and Objectives The study aimed to estimate the chronological age-based pulp and tooth volume (PTV) ratios in adults from Uttar Pradesh, India, using CBCT and voxel counting dental software. Materials and Methods Thirty-six CBCT scans were allocated into three Groups, I, II, and III (12 in each group) randomly to study the pulp volume of lateral incisor, canine, and first premolar, respectively. PTV was calculated by image segmentation method using Xelis Dental software. A correlation between chronological age with PTV was established using derived regression equations. Statistical Analysis All the data were subjected to statistical analysis using Statistical Package for Social Sciences version 16.0. Results Estimated age and standard error were determined. Standard errors of estimates were 11.24 years (LI), 7.78 years (C), 9.89 years (PM) group, lowest being for canines. The estimated age was compared with the chronological age. The difference between the chronological age and the estimated age by the derived equation for the present study was statistically nonsignificant (P = 1.00). Conclusions The results of the study show the feasibility of calculation of PTV ratios on CBCT to estimate the age for the set population with canine as the best predictor of age for the present study population.
Collapse
Affiliation(s)
- Akshay Rathore
- Department of Oral Medicine and Radiology, I. T. S. Dental College, Ghaziabad, Uttar Pradesh, India
| | - Nidhi Puri
- Department of Oral Medicine and Radiology, I. T. S. Dental College, Ghaziabad, Uttar Pradesh, India
| | - Balwinder Singh
- Department of Oral Medicine and Radiology, SGRD Institute of Dental Sciences and Research, Amritsar, Punjab, India
| | - Kirandeep Kaur
- Department of Oral and Maxillofacial Surgery, SGRD Institute of Dental Sciences and Research, Amritsar, Punjab, India
| | | | - Shivangi Singh
- Department of Oral Medicine and Radiology, I. T. S. Centre for Dental Studies and Research, Ghaziabad, Uttar Pradesh, India
| |
Collapse
|
15
|
Radiomics approach to the condylar head for legal age classification using cone-beam computed tomography: A pilot study. PLoS One 2023; 18:e0280523. [PMID: 36656878 PMCID: PMC9851527 DOI: 10.1371/journal.pone.0280523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 01/02/2023] [Indexed: 01/20/2023] Open
Abstract
Legal age estimation of living individuals is a critically important issue, and radiomics is an emerging research field that extracts quantitative data from medical images. However, no reports have proposed age-related radiomics features of the condylar head or an age classification model using those features. This study aimed to introduce a radiomics approach for various classifications of legal age (18, 19, 20, and 21 years old) based on cone-beam computed tomography (CBCT) images of the mandibular condylar head, and to evaluate the usefulness of the radiomics features selected by machine learning models as imaging biomarkers. CBCT images from 85 subjects were divided into eight age groups for four legal age classifications: ≤17 and ≥18 years old groups (18-year age classification), ≤18 and ≥19 years old groups (19-year age classification), ≤19 and ≥20 years old groups (20-year age classification) and ≤20 and ≥21 years old groups (21-year age classification). The condylar heads were manually segmented by an expert. In total, 127 radiomics features were extracted from the segmented area of each condylar head. The random forest (RF) method was utilized to select features and develop the age classification model for four legal ages. After sorting features in descending order of importance, the top 10 extracted features were used. The 21-year age classification model showed the best performance, with an accuracy of 91.18%, sensitivity of 80%, and specificity of 95.83%. Radiomics features of the condylar head using CBCT showed the possibility of age estimation, and the selected features were useful as imaging biomarkers.
Collapse
|
16
|
Yousefi F, Mohammadi Y, Ahmadvand M, Razaghi P. Dental age estimation using cone-beam computed tomography: A systematic review and meta-analysis. Imaging Sci Dent 2023. [DOI: 10.5624/isd.20221226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023] Open
Affiliation(s)
- Faezeh Yousefi
- Department of Oral and Maxillofacial Radiology, Hamadan University of Medical Sciences, Hamadan, Iran
- Dental Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Younes Mohammadi
- Department of Epidemiology, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Mehrnaz Ahmadvand
- Department of Oral and Maxillofacial Radiology, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Parnian Razaghi
- Dental Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| |
Collapse
|
17
|
Santos MA, Muinelo-Lorenzo J, Fernández-Alonso A, Cruz-Landeira A, Aroso C, Suárez-Cunqueiro MM. Age Estimation Using Maxillary Central Incisor Analysis on Cone Beam Computed Tomography Human Images. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:13370. [PMID: 36293951 PMCID: PMC9603614 DOI: 10.3390/ijerph192013370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 10/10/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Forensic dentistry plays an important role in human identification, and dental age estimation is an important part of the process. Secondary dentin deposition throughout an individual's lifetime and consequent modification in teeth anatomy is an important parameter for age estimation procedures. The aim of the present study was to develop regression equations to determine age in adults by means of linear measurements and ratios on sagittal, coronal and axial slices of maxillary central incisors using cone bean computed tomography (CBCT). Multiplanar measurements of upper central incisors were taken for a sample of 373 CBCTs. Subsequently, one-way analysis of variance (ANOVA) and multivariate linear regressions were performed for age estimation. The equations obtained from axial linear measurements and ratios presented a standard error of the estimate (SEE) of ±10.9 years (R2 = 0.49), and a SEE of ±10.8 years (R2 = 0.50), respectively. The equation obtained for multiplanar linear measurements presented a SEE of ±10.9 years (R2 = 0.52), while the equation for multiplanar ratios presented a SEE of ±10.7 years (R2 = 0.51). Thus, CBCT measurements on upper central incisors were found to be an acceptable method for age estimation. Horizontal measurements, especially pulp measurements, improve the accuracy of age estimate equations.
Collapse
Affiliation(s)
- María Arminda Santos
- Department of Dental Science, University Institute of Health Sciences (IUCS), Cooperativa de Ensino Superior Politécnico e Universitário (CESPU), 4585-116 Gandra, Portugal
- Department of Surgery and Medical-Surgical Specialties, Medicine and Dentistry School, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Juan Muinelo-Lorenzo
- Department of Surgery and Medical-Surgical Specialties, Medicine and Dentistry School, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Ana Fernández-Alonso
- Department of Surgery and Medical-Surgical Specialties, Medicine and Dentistry School, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Angelines Cruz-Landeira
- Department of Forensic Sciences, Pathology, Ginecology and Obstetrics, and Pediatrics, Medicine and Dentistry School, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Carlos Aroso
- Oral Pathology and Rehabilitation Research Unit (UNIPRO), University Institute of Health Sciences (IUCS), Cooperativa de Ensino Superior Politénico e Universitario (CESPU), 4585-116 Gandra, Portugal
| | - María Mercedes Suárez-Cunqueiro
- Department of Surgery and Medical-Surgical Specialties, Medicine and Dentistry School, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
- Health Research Institute of Santiago de Compostela (IDIS), Complexo Hospitalario Universitario de Santiago de Compostela (CHUS/SERGAS), 15706 Santiago de Compostela, Spain
| |
Collapse
|
18
|
Cone-Beam Computed Tomography: A New Tool on the Horizon for Forensic Dentistry. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19095352. [PMID: 35564747 PMCID: PMC9104190 DOI: 10.3390/ijerph19095352] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 04/20/2022] [Accepted: 04/22/2022] [Indexed: 12/15/2022]
Abstract
Teeth and bones of calvarium are important structures from a forensic point of view, as they are extremely resilient to destruction or decomposition, even under temperature variations. Radiology is inevitably an important tool in forensic investigations. Maxillofacial radiology provides a considerable amount of information for the identification of remains and evidence in case of legal matters. The advent of cone-beam computed tomography (CBCT) in the arena of maxillofacial 3D imaging has contributed immensely to forensic science such as the age estimation through teeth, analysis of bite marks, determination of race and sex, etc. The advantages of accuracy in imaging the anatomy, digitized technology favoring easier comparison of records and storage of records for a longer period, cost reduction, dose reduction, and easier portability have made it an unavoidable adjunct in forensic investigations. The aim of this paper is to review and highlight the importance of CBCT in successful forensic identification and analysis. This review is written to address the various aspects of CBCT as a recently developed technology that may be very useful in some forensic contexts, based on searches for current studies in the literature using PubMed, Scopus, Web of Science, and Google Scholar databases, to identify studies published since inception to December 2021, with no language restriction. In conclusion, CBCT is an accessible 3D imaging technology with many applications, one of them being in forensic sciences.
Collapse
|
19
|
Gunacar DN, Bayrak S, Sinanoglu EA. Three-dimensional verification of the radiographic visibility of the root pulp used for forensic age estimation in mandibular third molars. Dentomaxillofac Radiol 2022; 51:20210368. [PMID: 34762520 PMCID: PMC8925871 DOI: 10.1259/dmfr.20210368] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES The aim of this study was to assess the reliability of panoramic radiography (OPG) using age estimation method using cone beam computed tomography (CBCT) verification in the evaluation of radiographic visibility of root pulp (RPV) of mandibular third molars for age estimation. METHODS CBCT and OPG images of 429 mandibular third molars from 290 patients were evaluated. RPV of fully mineralized mandibular third molars was evaluated as stages 0, 1, 2, and 3 for both imaging methods. Descriptive statistics were performed separately for stages by age for both genders. The consistency of these scores with chronological age was evaluated for both imaging methods. The reliability of OPG evaluation was also analyzed with CBCT scores.Results Spearman's rho correlation demonstrated a positive correlation between RPV and chronological age for both genders and for OPG and CBCT evaluation. Considering the minimum ages of both imaging methods, all stages were above the age of 18 except for the female group of Stage 2 and all Stage 0. For the comparison of OPG and CBCT RPV Staging scores, the κ score was found to be 0.312 (p < 0.001), indicating a fair agreement. CONCLUSION In conclusion, the absence of Stage 3 at age of 18 and under might have a forensic value for RPV age estimation method. Considering the fair agreement in the verification of OPG scores, it is not possible to determine the exact age with the RPV detected in OPG images, the use of CBCT for the RPV evaluation is recommended to available cases.
Collapse
Affiliation(s)
- Dilara Nil Gunacar
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Recep Tayyip Erdogan University, Rize, Turkey
| | - Seval Bayrak
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Bolu Abant İzzet Baysal University, Bolu, Turkey
| | - Enver Alper Sinanoglu
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Kocaeli University, Kocaeli, Turkey
| |
Collapse
|
20
|
Van den Broeck M, Stock E, Vermeiren Y, Verhaert L, Duchateau L, Cornillie P. Age estimation in young dogs by radiographic assessment of the canine pulp cavity/tooth width ratio. Anat Histol Embryol 2022; 51:269-279. [PMID: 35104017 DOI: 10.1111/ahe.12787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 01/13/2022] [Indexed: 11/29/2022]
Abstract
Age estimation in adult dogs can be performed by the radiographic measurement of the tooth pulp cavity, but the technique has hardly been described. In this study, the application of measuring pulp/tooth width ratios (P/T ratios) of the maxillary canine teeth was investigated. Pulp and tooth widths were measured at two locations on 166 maxillary canine teeth of the heads of 84 dog cadavers, using digital extraoral lateral oblique open mouth radiographs. The dogs belonged to different breeds and sexes and had a known age between 194 and 1907 days (approximately 6 months - 5 years). Both at the cemento-enamel junction (CE) and the half-height of the tooth, a comparable non-linear regression with age was demonstrated. Measuring at the CE location was less hindered by wear or superimposition. No statistically significant difference according to sex and breed size and no clinically significant difference according to skull type was found. The highest predictable capacity was found in the youngest dogs until the age of 448 days, of which 84.4% of the canine teeth had a P/T ratio above 0.39. Our results demonstrate that measuring P/T ratios of canine teeth can be used in practice to assign dogs to age categories, with the highest accuracy in young adult dogs.
Collapse
Affiliation(s)
- Martine Van den Broeck
- Department of Morphology, Imaging, Orthopedics, Rehabilitation and Nutrition, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Emmelie Stock
- Department of Morphology, Imaging, Orthopedics, Rehabilitation and Nutrition, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Yoni Vermeiren
- Department of Morphology, Imaging, Orthopedics, Rehabilitation and Nutrition, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Leen Verhaert
- Department of Small animals, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Luc Duchateau
- Department of Veterinary and Biosciences, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Pieter Cornillie
- Department of Morphology, Imaging, Orthopedics, Rehabilitation and Nutrition, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| |
Collapse
|
21
|
Population-specific age estimation in Black Americans and Chinese people based on pulp chamber volume of first molars from cone beam computed tomography. Int J Legal Med 2022; 136:811-819. [PMID: 35044511 DOI: 10.1007/s00414-022-02776-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Accepted: 01/15/2022] [Indexed: 10/19/2022]
Abstract
OBJECTIVES To validate the fitness of the age estimation model in Black Americans, which was previously and solely established for the Chinese population based on pulp chamber volume of the first molars from cone beam computed tomography (CBCT), and to establish a new age estimation model for Black Americans. MATERIALS AND METHODS A total of 203 subjects with CBCT scans, including 119 Chinese and 84 Black Americans, were retrospectively identified. The age range of subjects was between 11 and 87 years. For both populations, automated 3D pulp chamber segmentation of the first molars was performed by deep learning, followed by volume calculation and age estimation by a logarithmic regression model, which was established in a prior study solely on Chinese population. Additionally, a separate logarithmic regression analysis was carried out on Black Americans. The performance of age estimation was assessed by the mean absolute error (MAE), root mean square error (RMSE), Wilcoxon signed rank test, and coefficient of determination (R2) between the actual and estimated human ages. RESULTS When applying the age estimation model established in the prior study, MAE = 7.994 years and RMSE = 10.065 years were observed in the Chinese population, while MAE = 14.049 years and RMSE = 17.866 years were observed in Black Americans. The new age estimation model established for Black Americans was AGE = 89.752 - 21.176 × lnV (V = pulp chamber volume), with MAE = 7.930 years, RMSE = 10.664 years, and coefficient of determination (R2) = 0.600. CONCLUSIONS Population-specific age estimation is needed when applied in Black Americans and Chinese people based on pulp chamber volume of the first molars from CBCT.
Collapse
|
22
|
Merdietio Boedi R, Shepherd S, Mânica S, Franco A. CBCT in dental age estimation: A systematic review and meta analysis. Dentomaxillofac Radiol 2022; 51:20210335. [PMID: 34995103 PMCID: PMC9499196 DOI: 10.1259/dmfr.20210335] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVES This study aimed to investigate the reproducibility of dental age estimation methods in cone beam computed tomography (CBCT) and the correlation between dental (DA) and chronological (CA) ages. METHODS The scientific literature was searched in six databases (PubMed, Scopus, LILACS, Web of Science, SciELO, and OATD). Only observational studies were selected. Within each study, the outcomes of interest were (I) the quantified reproducibility of the method (κ statistics and Intraclass correlation coefficient); and (II) the correlation (r) between the dental and chronological ages. A random-effect three-level meta-analysis was conducted alongside moderator analysis based on methods, arch (maxillary/mandibular), population, and number of roots. RESULTS From 671 studies, 39 fulfilled the inclusion criteria, with one study reporting two different methods. The methods used in the studies were divided into metric (n = 17), volumetric (n = 20), staging (n = 2), and atlas (n = 1). All studies reported high examiner reproducibility. Group 1 (metric and volumetric) provided a high inverse weighted r ([Formula: see text] = -0.71, CI [-0.79,-0.61]), and Group 2 (staging) provided a medium-weighted r ([Formula: see text] = 0.49, CI [0.44, 0.53]). Moderator analysis on Group one did not show statistically significant differences between methods, tooth position, arch, and number of roots. An exception was detected in the analysis based on population (Southeast Asia, [Formula: see text] = -0.89, CI [-0.94,-0.81]). CONCLUSION There is high evidence that CBCT methods are reproducible and reliable in dental age estimation. Quantitative metric and volumetric analysis demonstrated better performance in predicting chronological age than staging. Future studies exploring population-specific variability for age estimation with metric and volumetric CBCT analysis may prove beneficial.
Collapse
Affiliation(s)
- Rizky Merdietio Boedi
- Centre of Forensic and Legal Medicine and Dentistry, University of Dundee, Dundee, UK.,Department of Dentistry, Universitas Diponegoro, Semarang, Indonesia
| | - Simon Shepherd
- Oral Surgery, School of Dentistry, University of Dundee, Dundee, UK
| | - Scheila Mânica
- Centre of Forensic and Legal Medicine and Dentistry, University of Dundee, Dundee, UK
| | - Ademir Franco
- Centre of Forensic and Legal Medicine and Dentistry, University of Dundee, Dundee, UK
| |
Collapse
|
23
|
Castillo Páez JA, Fajardo de Pérez LDC, Moffa Barros AG. [Use of diagnostic modalities for dentofacial imaging in forensic dentistry. Literature review]. REVISTA CIENTÍFICA ODONTOLÓGICA 2021; 9:e088. [PMID: 38463727 PMCID: PMC10919827 DOI: 10.21142/2523-2754-0904-2021-088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 11/09/2021] [Indexed: 03/12/2024] Open
Abstract
Objective To describe the use of diagnostic modalities for dentofacial imaging in forensic dentistry. Materials and Methods A scientific search was carried out in the PubMed, Google Academic, and SciELO databases with the keywords "Dentofacial Imaging", "Panoramic Radiography", "Lateral Cephalogram", "Cone Beam Computed Tomography (CBCT)", "Digital Radiography", and "Forensic Dentistry". Forty-eight recently dated articles published in English were selected, seeking information to describe the use of diagnostic modalities pertaining to dentofacial imaging in forensic dentistry. Results The most relevant diagnostic modalities of dentofacial imaging for forensic dentistry include panoramic radiography, lateral skull radiography, posterior-anterior skull radiography and cone beam computed tomography. Conclusions The modalities described, together with morphometric analyses, allow forensic dentists to identify a corpse, estimate age, sex, and even facilitate forensic facial reconstruction for identification purposes.
Collapse
Affiliation(s)
- José Alberto Castillo Páez
- Departamento de Estomatoquirúrgica, Facultad de Odontología de la Universidad de Carabobo. Valencia, Venezuela. , Universidad de Carabobo Departamento de Estomatoquirúrgica Facultad de Odontología Universidad de Carabobo Valencia Venezuela
| | - Liliber Del Carmen Fajardo de Pérez
- Departamento de Estomatoquirúrgica, Facultad de Odontología de la Universidad de Carabobo. Valencia, Venezuela. , Universidad de Carabobo Departamento de Estomatoquirúrgica Facultad de Odontología Universidad de Carabobo Valencia Venezuela
| | - Angelo Giovani Moffa Barros
- Facultad de Odontología de la Universidad de Carabobo. Valencia, Venezuela. Universidad de Carabobo Facultad de Odontología Universidad de Carabobo Valencia Venezuela
| |
Collapse
|
24
|
Silva CF, Cabral LC, Navarro de Oliveira M, da Mota Martins V, Machado AC, Blumenberg C, Paranhos LR, Santos-Filho PCF. The influence of customization of glass fiber posts on fracture strength and failure pattern: A systematic review and meta-analysis of preclinical ex-vivo studies. J Mech Behav Biomed Mater 2021; 118:104433. [PMID: 33684707 DOI: 10.1016/j.jmbbm.2021.104433] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 02/22/2021] [Accepted: 02/26/2021] [Indexed: 12/14/2022]
Abstract
OBJECTIVE To perform a systematic review of the literature focused to evaluate in vitro function of prefabricated fiber posts with and without customization by additional auxillary fiber posts and composite resin on the fracture strength of wide or enlarged canals and the failure pattern. METHODS Six databases were used as primary search sources (PubMed, Scopus, LILACS, SciELO, Science Direct, and Web of Science) and three databases (Open Grey, Open Thesis, and OATD) were used to partially capture the "grey literature". The research included laboratory studies that used human upper anterior teeth aiming to assess the fracture strength and failure pattern of different glass fiber post customizations by additional auxiliary fiber posts or composite resin. The search had no restriction of year, language, and publication status. The risk of bias of the studies was assessed from the criteria established in systematic reviews of laboratory studies. Standardized mean differences were calculated by comparing the mean fracture strengths of customized and non-customized posts. Pooled estimates were calculated by Glass' delta method using the random-effects model. Subtotal estimates were presented according to each type of relining procedure and an overall estimate was described considering all studies combined. RESULTS The search provided 2291 results, from which six met the eligibility criteria and were included in the qualitative assessment of the review. Only three studies presented a moderate risk of bias. The meta-analysis results showed that the use of auxiliary posts produced higher mean fracture strengths than non-customized posts (SMD = 2.21; 95%CI: 0.74; 3.68), and it was more effective than the use of composite resin to reline the posts. CONCLUSION Based on laboratories studies, even though has not been observed any difference to a statistically significant level on fracture strength and failure pattern of the customized and non-customized post, future studies should follow a standardized approach to implementation and reporting of data.
Collapse
Affiliation(s)
- Camila Ferreira Silva
- Post-graduate Program in Dentistry, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil
| | - Luana Cardoso Cabral
- Post-graduate Program in Dentistry, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil
| | - Murilo Navarro de Oliveira
- Post-graduate Program in Dentistry, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil
| | - Victor da Mota Martins
- Post-graduate Program in Dentistry, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil
| | - Alexandre Coelho Machado
- Department of Oral Health, Technical Health School, Federal University of Uberlândia, Uberlândia, Brazil
| | - Cauane Blumenberg
- Post-graduate Program in Epidemiology, Federal University of Pelotas, Pelotas, RS, Brazil
| | - Luiz Renato Paranhos
- Department of Preventive and Community Dentistry, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil.
| | - Paulo César Freitas Santos-Filho
- Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil
| |
Collapse
|
25
|
Katata C, Sasaki JI, Li A, Abe GL, Nör JE, Hayashi M, Imazato S. Fabrication of Vascularized DPSC Constructs for Efficient Pulp Regeneration. J Dent Res 2021; 100:1351-1358. [PMID: 33913364 DOI: 10.1177/00220345211007427] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Dental pulp regeneration is a promising approach to restore the vitality of necrotic teeth. We have previously reported the fabrication of scaffold-free cell constructs containing only dental pulp stem cells (DPSCs) and their ability to form pulp-like tissue in the pulpless tooth. However, the DPSC construct could not build pulp-like tissue with a full root length because it is difficult to induce blood vessels from a small root canal foramen. Therefore, we hypothesized that vascular structure could be preformed in the DPSC construct by employing endothelial differentiation capability of DPSCs, and vascularized constructs might facilitate dental pulp regeneration in the pulpless tooth. In this study, vascularized DPSC constructs were fabricated by inducing endothelial differentiation, and then we investigated the behavior of differentiated DPSCs, the internal structure of cell constructs, and their pulp regenerative ability in vivo. We observed that DPSCs positive for CD31 and von Willebrand factor were localized at the outer layer of constructs and formed a reticulated lumen structure. The cells constituting the outer layer of the construct expressed endothelial differentiation markers at higher levels than cells in the inner part. These results indicated that DPSCs in the outer layer differentiated into endothelial cells and formed vascular-like structures in the cell construct. Next, a vascularized DPSC construct was transplanted into the human pulpless tooth that was implanted into immunodeficient mice in the subcutaneous space. After 6 wk of implantation, the vascularized construct formed pulp-like tissues with higher density of human CD31-positive blood vessels when compared with specimens implanted with a DPSC construct without prevascularization. These results suggest that the vascular structure formed in the DPSC construct facilitated the blood supply and enhanced pulp regeneration. This study demonstrates that a vascularized DPSC construct is a prospective biomaterial as an implant for novel dental pulp regeneration.
Collapse
Affiliation(s)
- C Katata
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Osaka, Japan.,Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - J I Sasaki
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - A Li
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - G L Abe
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - J E Nör
- Department of Cariology, Restorative Sciences and Endodontics, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - M Hayashi
- Department of Restorative Dentistry and Endodontology, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - S Imazato
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Osaka, Japan.,Department of Advanced Functional Materials Science, Osaka University Graduate School of Dentistry, Osaka, Japan
| |
Collapse
|
26
|
Comparison of two established 2D staging techniques to their appliance in 3D cone beam computer-tomography for dental age estimation. Sci Rep 2021; 11:9024. [PMID: 33907220 PMCID: PMC8079438 DOI: 10.1038/s41598-021-88379-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Accepted: 04/07/2021] [Indexed: 12/19/2022] Open
Abstract
For medicolegal purposes, orthodontic or orthognathic treatment various stomatological staging technique for age estimation with appliance of conventional radiographic images have been published. It remains uninvestigated if cone beam computer-tomography delivers comparable staging results to the conventional radiographic stages of third molar analysis. We conducted a retrospective cross-sectional study of 312 patients aged 13–21 years. Dental age estimation staging technique, introduced by Nolla and Demirjian, were applied on the left lower third molar imaged by conventional panoramic radiographs and cone beam computer-tomography. It was investigated if 2D and 3D imaging presented different staging results for dental age estimation. In 21% the Demirjian’s staging differed by a single stage between 2 and 3D images. The greatest congruence (87%) between 2 and 3D images was revealed for stage 7 (G). In contrary, stage 5 (E) presented the lowest level of congruence with 47.4%. The categorization of Nolla revealed divergences in staging for than two categorical variables in Nolla’s stages 3, 4, 5 and 6. In general, the analysis of the data displayed the divergence for Nolla’s stages 4–8. The staging results for 2D and 3D imaging in accordance to the rules of Nolla and Demirjian showed significant differences. Individuals of 18 years may present immature third molars, thus merely an immature third molar cannot reject legal majority. Nolla’s and Demirjian’s 2D and 3D imaging present significantly different staging results.
Collapse
|
27
|
Age-dependent decrease in dental pulp cavity volume as a feature for age assessment: a comparative in vitro study using 9.4-T UTE-MRI and CBCT 3D imaging. Int J Legal Med 2021; 135:1599-1609. [PMID: 33903959 PMCID: PMC8206054 DOI: 10.1007/s00414-021-02603-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 04/14/2021] [Indexed: 11/13/2022]
Abstract
Evaluation of secondary dentin formation is generally suitable for age assessment. We investigated the potential of modern magnetic resonance imaging (MRI) technology to visualize the dental pulp in direct comparison with cone beam computed tomography (CBCT). To this end, we examined 32 extracted human teeth (teeth 11–48 [FDI]) using 9.4-T ultrashort echo time (UTE)-MRI and CBCT (methods). 3D reconstruction was performed via both manual and semi-automatic segmentation (settings) for both methods in two runs by one examiner. Nine teeth were also examined by a second examiner. We evaluated the agreement between examiners, scan methods, and settings. CBCT was able to determine the pulp volume for all teeth. This was not possible for two teeth on MRI due to MRI artifacts. The mean pulp volume estimated by CBCT was consistently higher (~ 43%) with greater variability. With lower variability in its measurements, evaluation of pulp volume using the MRI method exhibited greater sensitivity to differences between settings (p = 0.016) and between examiners (p = 0.009). The interactions of single-rooted teeth and multi-rooted teeth and method or setting were not found to be significant. For examiner agreement, the mean pulp volumes were similar with overlapping measurements (ICC > 0.995). Suitable for use in age assessment is 9.4-T UTE-MRI with good reliability and lower variation than CBCT. For MRI, manual segmentation is necessary due to a more detailed representation of the interior of the pulp cavity. Since determination of pulp volume is expected to be systematically larger using CBCT, method-specific reference values are indispensable for practical age assessment procedures. The results should be verified under in vivo conditions in the future.
Collapse
|
28
|
Nuzzolese E. Integration of dentistry and forensic odontology for a structured identification system and border control. Forensic Sci Res 2021; 7:94-95. [PMID: 35341123 PMCID: PMC8942497 DOI: 10.1080/20961790.2020.1842155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Affiliation(s)
- Emilio Nuzzolese
- Department of Sciences of Public Health and Pediatrics, University of Turin, Turin, Italy
| |
Collapse
|
29
|
Elgazzar FM, Elboraey MO, El-Sarnagawy GN. The accuracy of age estimation from pulp chamber/crown volume ratio of canines obtained by cone beam computed tomography images: an Egyptian study. EGYPTIAN JOURNAL OF FORENSIC SCIENCES 2020. [DOI: 10.1186/s41935-020-00212-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
Abstract
Background
Globally, the need for an accurate and valid method for age estimation in adults still exists. The aging process is associated with secondary dentine deposition that reduces the volume of teeth pulp. Therefore, dental age could be recognized from the volume of pulp cavity. The aim of this study was to assess the accuracy and validity of pulp chamber/crown volume ratio of maxillary and mandibular canines in estimating age using cone beam computed tomography (CBCT) images in a sample of the Egyptian population.
Results
There were significant strong negative correlations between age and each of the maxillary pulp chamber volume (PCV), mandibular PCV, maxillary pulp chamber/crown volume (PCV/CV) ratio, and mandibular PCV/CV ratio (p < 0.001). Furthermore, no significant differences were detected between both sexes regarding the mean maxillary and mandibular PCV and PCV/CV ratios (p > 0.05). The best fit regression model for age prediction was as follows: age (years) = 70.21 − 784.0x maxillary PCV/CV ratio − 1.66x maxillary PCV. The proposed model showed good power of prediction (R2 adjusted = 0.951). Additionally, the model was validated on an independent sample of 100 CBCT images with a root mean squared error (RMSE) of 2.86 years.
Conclusion
The obtained valid regression formula in this study can serve as a reliable tool for age estimation in Egyptians. This formula should be further validated on a larger sample size of the Egyptian population that considers more steady age distribution.
Collapse
|
30
|
Zheng Q, Ge Z, Du H, Li G. Age estimation based on 3D pulp chamber segmentation of first molars from cone-beam-computed tomography by integrated deep learning and level set. Int J Legal Med 2020; 135:365-373. [PMID: 33185706 DOI: 10.1007/s00414-020-02459-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 11/05/2020] [Indexed: 11/27/2022]
Abstract
OBJECTIVES To develop an automatic segmentation method to segment the pulp chamber of first molars from 3D cone-beam-computed tomography (CBCT) images, and to estimate ages by calculated pulp volumes. MATERIALS AND METHODS Patients with CBCT scans were retrospectively identified. The age estimation was formulated as CBCT image segmentation using a coarse-to-fine strategy by integrated deep learning (DL) and level set (LS), followed by establishing a linear regression model. On the training data, DL model was trained for coarse segmentation. The validation set was to determine the optimal DL model, and a LS method established on it was to refine the coarse segmentation. On the testing data, the integrated DL and LS method was applied for pulp chamber segmentation, followed by volume calculation and age estimation. Statistical analysis was performed by Wilcoxon rank sum test to demonstrate gender difference in pulp chamber volume, and volume difference between maxillary and mandibular molars. Wilcoxon signed-rank test was adopted to compare true and estimated ages. RESULTS A total of 180 CBCT studies were randomly divided into 37/10/133 patients for training, validation, and testing data, respectively. In the training and validation sets, the results showed high spatial overlaps between manual and automatic segmentation (dice = 87.8%). For the testing set, the estimated human ages were not significantly different with true human age (p = 0.57), with a correlation coefficient r = 0.74. CONCLUSIONS An integrated DL and LS method was able to segment pulp chamber of first molars from 3D CBCT images, and the derived pulp chamber volumes could effectively estimate the human ages.
Collapse
Affiliation(s)
- Qiang Zheng
- School of Computer and Control Engineering, Yantai University, Yantai, China
| | - Zhipu Ge
- Department of Oral and Maxillofacial Radiology, Peking University School and Hospital of Stomatology, Beijing, China
- Qingdao Stomatological Hospital, Qingdao, China
| | - Han Du
- Department of Oral and Maxillofacial Radiology, Peking University School and Hospital of Stomatology, Beijing, China
| | - Gang Li
- Department of Oral and Maxillofacial Radiology, Peking University School and Hospital of Stomatology, Beijing, China.
| |
Collapse
|
31
|
Cameriere R, De Luca S, Soriano Vázquez I, Kiş HC, Pigolkin Y, Kumagai A, Ferrante L. A full Bayesian calibration model for assessing age in adults by means of pulp/tooth area ratio in periapical radiography. Int J Legal Med 2020; 135:677-685. [PMID: 33017037 DOI: 10.1007/s00414-020-02438-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Accepted: 09/30/2020] [Indexed: 12/01/2022]
Abstract
The Bayesian approach is being a fundamental tool in forensic and legal field where inferences and decisions are made. In this study, a full Bayesian calibration model was developed to make probabilistic inferences about age estimation in a reference sample of 891 periapical X-rays of upper and lower canines. These teeth belonged to both deceased and living adult subjects, aged between 20 and 86 years, coming from five different countries (Turkey, Italy, Portugal, Japan and Mexico). For this purpose, the narrowing of pulp chamber due to the apposition of secondary dentine was analysed by means of the pulp/tooth area ratio. To determine the agreement of the method, intra- and inter-observer differences for measuring process were calculated by means of the intraclass correlation coefficient (ICC) analysis. Observer error tests showed excellent agreement between observers and between repeated assessments. According to the results of the ANCOVA, neither nationality nor sex was associated to the secondary dentine apposition while it is associated with individual's age. The results of the present study indicated that the concept of probability is intrinsically linked to the assessment of age in a forensic context, and the Bayesian approach could be considered a robust tool to overtake the bias generated by traditional regression models, thus helping the decision-making process in a legal framework.
Collapse
Affiliation(s)
- R Cameriere
- AgEstimation Project, Macerata, Italy.,Department of Forensic Medicine, Sechenov First Moscow State Medical University, Moscow, Russia
| | - Stefano De Luca
- Department of Forensic Medicine, Sechenov First Moscow State Medical University, Moscow, Russia. .,Área de Identificación Forense, Unidad de Derechos Humanos, Servicio Médico Legal, Santiago, Chile.
| | | | - H C Kiş
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Nuh Naci Yazgan University, Kayseri, Turkey
| | - Y Pigolkin
- Department of Forensic Medicine, Sechenov First Moscow State Medical University, Moscow, Russia
| | - A Kumagai
- Division of Forensic Medicine, Department of Forensic Sciences, Iwate Medical University, Morioka, Iwate, Japan
| | - L Ferrante
- Centre of Epidemiology, Biostatistics and Information Technology, Polytechnic University of Marche, Ancona, Italy
| |
Collapse
|
32
|
Timme M, Borkert J, Nagelmann N, Schmeling A. Evaluation of secondary dentin formation for forensic age assessment by means of semi-automatic segmented ultrahigh field 9.4 T UTE MRI datasets. Int J Legal Med 2020; 134:2283-2288. [PMID: 32940844 PMCID: PMC7578159 DOI: 10.1007/s00414-020-02425-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 09/10/2020] [Indexed: 12/17/2022]
Abstract
Dental methods are an important element of forensic age assessment of living persons. After the development of all the teeth, including third molars, is completed, degenerative characteristics can be used to assess age. The radiologically detectable reduction of the dental pulp cavity has been described as such a feature. We investigated the suitability of ultrahigh field 9.4 T ultrashort time echo (UTE) magnetic resonance imaging (MRI) for the evaluation of pulp cavity volume in relation to the total tooth volume in 4 extracted human teeth. The volume calculations were performed after semi-automatic segmentation by software AMIRA using the different intensities of the structures in the MRI dataset. The automatically selected intensity range was adjusted manually to the structures. The visual distinction of pulp and tooth structure was possible in all cases with in-plane resolution < 70 μm. Ratios of tooth/pulp volume were calculated, which could be suitable for age estimation procedures. Intensity shifts within the pulp were not always correctly assigned by the software in the course of segmentation. 9.4 T UTE-MRI technology is a forward-looking, radiation-free procedure that allows the volume of the dental pulp to be determined at high spatial resolution and is thus potentially a valuable instrument for the age assessment of living persons.
Collapse
Affiliation(s)
- Maximilian Timme
- Institute of Legal Medicine, University Hospital Münster, Röntgenstraße 23, 48149, Münster, Germany.
| | - Jens Borkert
- Institute of Legal Medicine, University Hospital Münster, Röntgenstraße 23, 48149, Münster, Germany
| | - Nina Nagelmann
- Department of Clinical Radiology, Translational Research Imaging Center (TRIC), University Hospital Münster, Albert-Schweitzer-Campus 1, 48149, Münster, Germany
| | - Andreas Schmeling
- Institute of Legal Medicine, University Hospital Münster, Röntgenstraße 23, 48149, Münster, Germany
| |
Collapse
|
33
|
Molina A, Bravo M, Fonseca GM, Márquez-Grant N, Martín-de-Las-Heras S. Dental age estimation based on pulp chamber/crown volume ratio measured on CBCT images in a Spanish population. Int J Legal Med 2020; 135:359-364. [PMID: 32676887 DOI: 10.1007/s00414-020-02377-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 07/14/2020] [Indexed: 01/27/2023]
Abstract
Dental age estimation in living individuals is one of the most frequent requests undertaken by forensic odontologists. The aim of this study was to estimate the dental age by pulp/tooth volume ratio, as measured on cone beam computed tomography (CBCT) images, in a Spanish population. This study included 313 teeth from 107 adult individuals, 56 females and 51 males with a mean age of 44 ± 14 years. The statistical analysis of the results took account of clustering (multiple teeth in individuals). Linear regression models were constructed on the relationship between pulp/tooth volume ratio and chronological age for each tooth type. The highest coefficient of determination (R2) value was provided by the upper incisors (36.6%), and the difference between chronological and estimated age was less than 5 years in 31.3% of the sample and less than 10 years for 65.7%. CBCT is an accurate imaging technique to measure dental volume with a relatively low radiation dose, and it can be used to assess dental age in living adult individuals. Volumetric changes in the pulp cavity with increasing age proved valuable to estimate dental age in this Spanish population.
Collapse
Affiliation(s)
- Ana Molina
- Department of Forensic Medicine, University of Malaga, 29071, Malaga, Spain
| | - Manuel Bravo
- Department of Preventive and Community Dentistry, University of Granada, 18071, Granada, Spain
| | - Gabriel M Fonseca
- Centro de Investigación en Odontología Legal y Forense (CIO), Facultad de Odontología, Universidad de la Frontera, Temuco, Chile
| | - Nicholas Márquez-Grant
- Defence Academy of the United Kingdom, Cranfield Forensic Institute, Cranfield University, Shrivenham, SN6 8LA, UK
| | | |
Collapse
|
34
|
Verma M, Verma N, Sharma R, Sharma A. Dental age estimation methods in adult dentitions: An overview. J Forensic Dent Sci 2020; 11:57-63. [PMID: 32082039 PMCID: PMC7006305 DOI: 10.4103/jfo.jfds_64_19] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 11/15/2019] [Accepted: 11/22/2019] [Indexed: 01/22/2023] Open
Abstract
Age estimation is one of the essential factors in human identification. Teeth bestowed with features such as hardness and resilience to external factors such as chemicals, putrefaction, and fire explosions serve as a durable source in age estimation. Concurrently, they present with peculiar and comparable features of age-associated regressive changes along with dental procedures, which make them a mirror reflection of age changes from cradle to the grave of an individual. Age estimation in adults poses an enigma to the forensic dentists because as the age advances, the dentitions get influenced by numerous exogenous and endogenous factors which may lead to discrepancies between dental age and chronologic age. Since 1950, many authors have presented various methods for assessing age of individuals above 18 years. Here is an overview of the different methods with their application and limitations along with a mention of newer methods developed and tested with the formulation of population-specific formulas by Indian authors. The data have been sourced from different journal articles retrieved through Google Scholar and PubMed Central and articles received as study materials during the fellowship program in forensic odontology using keywords such as age estimation, adult dentitions, dentin translucency, and cementum annulations.
Collapse
Affiliation(s)
- Meenal Verma
- Department of Oral and Maxillofacial Pathology, Geetanjali Dental and Research Institute, Udaipur, Rajasthan, India
| | - Nikhil Verma
- Department of Prosthodontics and Crown and Bridge, Geetanjali Dental and Research Institute, Udaipur, Rajasthan, India
| | - Rakhee Sharma
- Department of Oral and Maxillofacial Pathology, Geetanjali Dental and Research Institute, Udaipur, Rajasthan, India
| | - Ashish Sharma
- Department of Oral and Maxillofacial Pathology, Rishiraj College of Dental Sciences, Bhopal, Madhya Pradesh, India
| |
Collapse
|