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Anatomical study of the maxillary sinus: which characteristics can influence its volume? SURGICAL AND RADIOLOGIC ANATOMY : SRA 2023; 45:81-87. [PMID: 36474022 DOI: 10.1007/s00276-022-03055-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 11/27/2022] [Indexed: 12/12/2022]
Abstract
PURPOSE To investigate whether there is a relationship between the volume of the maxillary sinus and individual parameters such as gender, side, posterior tooth absence, sinus membrane thickening, bony septa, vertical and sagittal skeletal patterns. METHODS The tomographic volume of the maxillary sinus from 211 individuals (422 sides) was evaluated using Horos DICOM Viewer Software. Bony septa and sinus membrane thickening were classified as absent or present. At the same time, loss of one or more teeth in the posterior region of the maxilla (except for the third molars) was considered. The t test was applied to analyze maxillary sinus volume according to gender, age, side, posterior tooth absence, sinus membrane thickening and bony septa. A one-way analysis of variance (ANOVA) with Tukey's post-hoc test was applied to compare sagittal and vertical patterns. Pearson's correlation coefficient was also used to verify the association between maxillary sinus volume, age and skeletal patterns. RESULTS Concerning the sagittal skeletal pattern, a statistically significant difference was observed between Classes II and III (p = 0.05) and it was confirmed by the Pearson's correlation coefficient (r = - 0.107/p = 0.029). No statistically significant differences were observed between the maxillary sinus volume according to gender (p = 0.06), side (p = 0.37), posterior tooth absence (p = 0.92), sinus membrane thickening (p = 0.47), bony septa (0.89) and vertical skeletal pattern (p = 0.67). No significant differences were observed with age (r = - 0.076/p = 0.109) and the vertical skeletal pattern (r = - 0.078/p = 0.108). CONCLUSION Maxillary sinus volume was influenced by the sagittal skeletal pattern and was higher in Class III individuals.
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Hui L, Hung KF, Bornstein MM, Leung YY. Linear and angular measurement using cone-beam computed tomography to enhance safety in Le Fort I osteotomy with tuberosity cut. Clin Oral Investig 2022; 26:7095-7105. [PMID: 35970956 DOI: 10.1007/s00784-022-04669-6] [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: 01/06/2022] [Accepted: 08/07/2022] [Indexed: 11/03/2022]
Abstract
OBJECTIVE The study aimed to evaluate surgical angles for tuberosity cut and linear and angular measurements for all horizontal cuts in Le Fort I osteotomy using cone-beam computed tomography (CBCT). MATERIALS AND METHODS This study included 189 CBCT scans to assess the surgical angles on 3 different sites distal to maxillary second molars relative to the midsagittal plane (MSP) and the buccal cortical plane (BCP) in relation to the descending palatine foramen for tuberosity cut. The linear and angular measurements for all horizontal cuts in Le Fort I osteotomy were also evaluated. RESULTS The mean surgical angles for tuberosity cut varied from 58.90 to 95.28° and 74.85 to 100.93° according to the MSP and the BCP, respectively. For the horizontal cuts, mean lengths (angles) for posterior buccal and lateral nasal wall osteotomies were 27.44 mm (13.62°) and 33.20 mm (9.60°), respectively, and a mean length of 47.12 mm was measured for nasal septum osteotomy. Additionally, the presence of impacted third molar resulted in significantly higher mean surgical angles than those with fully erupted or without third molars (p < 0.01). CONCLUSIONS Overall, angles running through the buccal midpoint of the third molars relative to the MSP (76.56°) or the BCP (92.31°) might be the most appropriate in clinical practice. Furthermore, some caution seems warranted when performing tuberosity cuts with the impacted third molars. CLINICAL RELEVANCE To avoid potential damage to the descending palatine artery for tuberosity cut in Le Fort I osteotomy.
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Affiliation(s)
- Liuling Hui
- Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Kuo Feng Hung
- Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
| | - Michael Marc Bornstein
- Oral and Maxillofacial Radiology, Faculty of Dentistry, Applied Oral Sciences and Community Dental Care, The University of Hong Kong, Hong Kong SAR, China.,Department of Oral Health & Medicine, University Center of Dental Medicine Basel UZB, University of Basel, Basel, Switzerland
| | - Yiu Yan Leung
- Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China.
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de Mendonça DS, Kurita LM, Carvalho FSR, Tuji FM, Silva PGDB, Bezerra TP, de Aguiar ASW, Gurgel Costa FW. Development and validation of a new formula for sex estimation based on multislice computed tomographic measurements of maxillary and frontal sinuses among Brazilian adults. Dentomaxillofac Radiol 2021; 50:20200490. [PMID: 33705208 DOI: 10.1259/dmfr.20200490] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES To evaluate the accuracy of the measurements of the maxillary sinus (MS) and frontal sinus (FS) in sex estimation among Brazilian adults using multislice computed tomography (MCT) and to develop and cross-validate a new formula for sex estimation. METHODS The present cross-sectional research was conducted in two phases: (1) development of a formula on the basis of the measurements of both the sinuses (50 males and 50 females); and (2) validation study (20 males and 20 females). The linear measurements (height, width and diameter) were assessed using the RadiAnt DICOM software. A new formula for sex estimation was developed (multivariate statistical approach) and validated. Receiver operating characteristic curves, area under the curve, sensitivity, specificity, positive and negative predictive values, accuracy and likelihood ratio were estimated. RESULTS Males displayed higher mean values (width, height and diameter) of the FS and MS (p < 0.05). The MS was a better predictor in sex estimation (males vs females), compared to the FS (accuracy between 61-74% and 58-69%, respectively). The distance between the right and left MS displayed the highest accuracy (74%). The sensitivity, specificity and accuracy of the new formula were 80%, 95.5% and 87.5%, respectively. 63.1% reduction was observed in the number of predictive values for sex estimation (individuals older than 30 years). CONCLUSIONS The present MCT measurements showed a higher accuracy in the estimation of sex in males. The highest accuracy was associated with the distance between the right and left MS. The new formula displayed high precision for sex estimation.
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Affiliation(s)
| | | | | | | | | | - Tácio Pinheiro Bezerra
- Department of Forensic Dentistry, Perícia Forense do Estado do Ceará, School of Dentistry, Centro Universitário Unichristus, Ceará, Brazil
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Tavares A, Montanha-Andrade K, Cury PR, Crusoé-Rebello I, Neves FS. Tomographic assessment of infrazygomatic crest bone depth for extra-alveolar miniscrew insertion in subjects with different vertical and sagittal skeletal patterns. Orthod Craniofac Res 2021; 25:49-54. [PMID: 33908170 DOI: 10.1111/ocr.12485] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 04/06/2021] [Accepted: 04/13/2021] [Indexed: 01/08/2023]
Abstract
OBJECTIVE To evaluate bone availability at the infrazygomatic crest for extra-alveolar bone miniscrew insertion in subjects with different vertical and sagittal skeletal patterns. SETTING AND SAMPLE POPULATION Measurements of the infrazygomatic crest were performed on multislice computed tomography scans from 58 adults with different skeletal patterns. MATERIALS AND METHODS Infrazygomatic crest bone depth was measured at 4, 5 and 6 mm from the cementoenamel junction (CEJ) of the maxillary first molar at three different angles (60°, 70° and 80°) in the first molar occlusal plane. The sagittal and vertical skeletal patterns were determined. Analysis of variance followed by Tukey's post hoc test was used (P ≤ .05). RESULTS Bone depth was greater near the CEJ (8.7 ± 3.1 mm) and lower in the apical area (5.8 ± 2.7 mm). In Class II subjects, considering 6 mm from the CEJ, there was a significantly lower depth at the 80° angle (5.4 ± 2.5 mm) than at 60° (8.6 ± 3.5 mm; P = .007). In mesofacial subjects, considering 5 and 6 mm from the CEJ, bone depth was lower at 80° (5.7 ± 3.2 mm and 5.3 ± 2.5 mm) than at 60° considering 4 mm from the CEJ (P ≤ .019). CONCLUSION Bone availability was lower at the apical level, especially in Class II and mesofacial subjects. Therefore, when the planned insertion site is located in the apical direction, it is recommended to choose shorter miniscrews (2.0 x 12mm) and a smaller insertion angle (60°) and/or to plan a miniscrew bone insertion deep enough to allow bicortical fixation.
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Affiliation(s)
- Alana Tavares
- Post-graduate Program in Dentistry and Health, School of Dentistry, Federal University of Bahia, Ufba, Salvador, Brazil
| | - Kátia Montanha-Andrade
- Post-graduate Program in Dentistry and Health, School of Dentistry, Federal University of Bahia, Ufba, Salvador, Brazil
| | - Patricia Ramos Cury
- Division of Periodontics, School of Dentistry, Federal University of Bahia, Ufba, Salvador, Brazil
| | - Ieda Crusoé-Rebello
- Division of Dentomaxillofacial Radiology, School of Dentistry, Federal University of Bahia, Ufba, Salvador, Brazil
| | - Frederico Sampaio Neves
- Division of Dentomaxillofacial Radiology, School of Dentistry, Federal University of Bahia, Ufba, Salvador, Brazil
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Aleluia RB, Duplat CB, Crusoé‐Rebello I, Neves FS. Assessment of the mandibular buccal shelf for orthodontic anchorage: Influence of side, gender and skeletal patterns. Orthod Craniofac Res 2021; 24 Suppl 1:83-91. [DOI: 10.1111/ocr.12463] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 11/06/2020] [Accepted: 12/01/2020] [Indexed: 01/06/2023]
Affiliation(s)
- Roberta Basañez Aleluia
- Division of Oral Radiology Department of Propedeutics and Integrated Clinic School of Dentistry Federal University of Bahia Salvador Brazil
| | - Candice Belchior Duplat
- Division of Oral Radiology Department of Propedeutics and Integrated Clinic School of Dentistry Federal University of Bahia Salvador Brazil
| | - Iêda Crusoé‐Rebello
- Division of Oral Radiology Department of Propedeutics and Integrated Clinic School of Dentistry Federal University of Bahia Salvador Brazil
| | - Frederico Sampaio Neves
- Division of Oral Radiology Department of Propedeutics and Integrated Clinic School of Dentistry Federal University of Bahia Salvador Brazil
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Faur CI, Roman RA, Bran S, Dinu C, Coclici A, Rotaru H, Hedesiu M. The Changes in Upper Airway Volume after Orthognathic Surgery Evaluated by Individual Segmentation on CBCT Images. MÆDICA 2019; 14:213-219. [PMID: 31798735 DOI: 10.26574/maedica.2019.14.3.213] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Objectives:The aim of this CBCT study was to evaluate the postoperative volume changes of the rhinosinusal airway space, maxillary sinuses and nasal fossa, that occur after Le Fort I osteotomy, using individual segmentation of 3D virtual models. Material and methods:A number of 16 patients (with Class II and Class III malocclusions) who underwent a CBCT examination for orthognathic surgery at six month-interval between preoperative and postoperative evaluations were included. Patients with thickening of the sinus mucosa, craniofacial syndromes, maxillofacial trauma, rhinoplasty or other maxillofacial pathological conditions were excluded from the study. Individual segmentation of airway volumes was performed by the ITK-SNAP 2.0 software. Paired student t-test was used for the statistical examination of volume changes and Pearson's test for the assessment of intra-rate correlation. Outcomes:A statistically significant decrease in the rhinosinusal volume in Class II (9.36±3.43 cm3) and Class III malocclusions (3.65±2.96 cm3) was found after Le Fort I osteotomy. A decrease in volume was also found for maxillary sinuses (5.63±1.52 cm3 for Class II and 6.72±4.5 cm3 for Class III malocclusion). Nasal fossa decreased in volume (3.79±3.8 cm3) in Class II malocclusion patients and increased (3.07±2.39 cm3) in Class III malocclusion patients. The Pearson correlation revealed a high intra-rate agreement of measurements. Conclusion:Le Fort I osteotomy modifies the postoperative volume of rhinosinusal aerial spaces and individual segmentation on CBCT images is a useful tool to analyze the changes.
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Affiliation(s)
- Cosmin Ioan Faur
- "Iuliu Hatieganu" University of Medicine and Pharmacy, Department of Maxillofacial Surgery and Radiology, Faculty of Dental Medicine, Cluj-Napoca, Romania
| | - Raluca Ancuta Roman
- "Iuliu Hatieganu" University of Medicine and Pharmacy, Department of Maxillofacial Surgery and Radiology, Faculty of Dental Medicine, Cluj-Napoca, Romania
| | - Simion Bran
- "Iuliu Hatieganu" University of Medicine and Pharmacy, Department of Maxillofacial Surgery and Radiology, Faculty of Dental Medicine, Cluj-Napoca, Romania
| | - Cristian Dinu
- "Iuliu Hatieganu" University of Medicine and Pharmacy, Department of Maxillofacial Surgery and Radiology, Faculty of Dental Medicine, Cluj-Napoca, Romania
| | - Alina Coclici
- "Iuliu Hatieganu" University of Medicine and Pharmacy, Department of Maxillofacial Surgery and Radiology, Faculty of Dental Medicine, Cluj-Napoca, Romania
| | - Horatiu Rotaru
- "Iuliu Hatieganu" University of Medicine and Pharmacy, Department of Maxillofacial Surgery and Radiology, Faculty of Dental Medicine, Cluj-Napoca, Romania
| | - Mihaela Hedesiu
- "Iuliu Hatieganu" University of Medicine and Pharmacy, Department of Maxillofacial Surgery and Radiology, Faculty of Dental Medicine, Cluj-Napoca, Romania
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Opalak CF, Parry M, Rock AK, Sima AP, Carr MT, Chandra V, Workman KG, Somasundaram A, Broaddus WC. Comparison of ABC/2 estimation and a volumetric computerized method for measurement of meningiomas using magnetic resonance imaging. J Neurooncol 2019; 144:275-282. [PMID: 31401721 DOI: 10.1007/s11060-019-03205-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Accepted: 06/04/2019] [Indexed: 01/02/2023]
Abstract
INTRODUCTION Measurement of tumor growth rates over time for patients with meningiomas has important prognostic and therapeutic implications. Our objective was to compare two methods of measuring meningioma volume: (1) the simplified ellipsoid (ABC/2) method; and (2) perimetric volume measurements using imaging software modules. METHODS Patients with conservatively managed meningiomas for at least 1.5 years were retrospectively identified from the VCU Brain and Spine Tumor Registry over a 10-year period (2005-2015). Tumor volumes were independently measured using the simplified ellipsoid and computerized perimetric methods. Intra class correlations (CC) and Bland-Altman analyses were performed. RESULTS A total of 26 patients representing 29 tumors were identified. Across 146 images, there were 24 (16%) images that were non-measurable using standard application commands with the computerized perimetric method. The mean volume obtained using the ABC/2 and computerized perimetric methods were 3.2 ± 3.4 cm3 and 3.4 ± 3.5 cm3, respectively. The mean volume difference was 0.2 cm3 (SE = 0.12; p = 0.10) across measurement methods. The concordance correlation coefficient (CCC) between methods was 0.95 (95% CI 0.91, 0.98). CONCLUSIONS There is excellent correlation between the simplified ellipsoid and computerized perimetric methods of volumetric analysis for conservatively managed meningiomas. The simplified ellipsoid method remains an excellent method for meningioma volume assessment and had an advantage over the perimetric method which failed to allow measurement of roughly one in six tumors on imaging.
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Affiliation(s)
- Charles F Opalak
- Department of Neurosurgery, Virginia Commonwealth University, 417 North 11th Street, Sixth Floor, P.O. Box 980631, Richmond, VA, 23219-0631, USA
| | - Matthew Parry
- Department of Neurosurgery, Virginia Commonwealth University, 417 North 11th Street, Sixth Floor, P.O. Box 980631, Richmond, VA, 23219-0631, USA
| | - Andrew K Rock
- Department of Neurosurgery, Virginia Commonwealth University, 417 North 11th Street, Sixth Floor, P.O. Box 980631, Richmond, VA, 23219-0631, USA
| | - Adam P Sima
- Department of Biostatistics, Virginia Commonwealth University, 830 East Main Street, Seventh Floor, P.O. Box 980032, Richmond, VA, 23298-0032, USA
| | - Matthew T Carr
- Department of Neurosurgery, Virginia Commonwealth University, 417 North 11th Street, Sixth Floor, P.O. Box 980631, Richmond, VA, 23219-0631, USA
| | - Vyshak Chandra
- Department of Neurosurgery, Virginia Commonwealth University, 417 North 11th Street, Sixth Floor, P.O. Box 980631, Richmond, VA, 23219-0631, USA
| | - Kathryn G Workman
- Department of Neurosurgery, Virginia Commonwealth University, 417 North 11th Street, Sixth Floor, P.O. Box 980631, Richmond, VA, 23219-0631, USA
| | - Aravind Somasundaram
- Department of Neurosurgery, Virginia Commonwealth University, 417 North 11th Street, Sixth Floor, P.O. Box 980631, Richmond, VA, 23219-0631, USA
| | - William C Broaddus
- Department of Neurosurgery, Virginia Commonwealth University, 417 North 11th Street, Sixth Floor, P.O. Box 980631, Richmond, VA, 23219-0631, USA.
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Does formalin fixation influence MSCT/CBCT accuracy? Surg Radiol Anat 2017; 40:31-37. [DOI: 10.1007/s00276-017-1908-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 08/05/2017] [Indexed: 10/19/2022]
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Almeida VC, Pinheiro LR, Salineiro FCS, Mendes FM, Neto JBC, Cavalcanti MGP, Pannuti CM. Performance of cone beam computed tomography and conventional intraoral radiographs in detecting interproximal alveolar bone lesions: a study in pig mandibles. BMC Oral Health 2017. [PMID: 28637451 PMCID: PMC5480103 DOI: 10.1186/s12903-017-0390-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background Cone beam computed tomography (CBCT) has been largely used in dentistry. Nevertheless, there is lack of evidence regarding CBCT accuracy in the diagnosis of early periodontal lesions as well as the correlation between accuracy and lesion size. The aim of this study was to evaluate accuracy of CBCT and conventional intraoral radiographs in detecting different-sized interproximal bone lesions created in pig mandibles. The hypothesis was that CBCT accuracy would be superior to radiographs in detecting incipient bone lesions. Methods Twenty swine dry mandibles were used, totalizing 80 experimental sites. Four groups were created according to exposure time to perchloric acid 70–72%: controls (no exposure), 2-hour exposure, 4-hour exposure, and 6-hour exposure. Standardized CBCT and conventional intraoral radiographs were taken and analyzed by two trained radiologists. The presence of lesions in the dry mandible was considered the gold standard. Sensitivity, specificity, and accuracy in detecting different-sized bone lesions were calculated for CBCT and intraoral radiographs. Results Accuracy of CBCT ranged from 0.762 to 0.825 and accuracy of periapical radiography ranged from 0.700 to 0.813, according to examiner and time of acid exposure. Inter-examiner agreement varied from slight to fair, whereas intra-examiner agreement varied from moderate to substantial. Conclusions CBCT performance was not superior to that provided by conventional intraoral radiographs in the detection of interproximal bone loss.
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Affiliation(s)
- Vanessa Camillo Almeida
- Department of Periodontology, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227, São Paulo, SP, 05508-000, Brazil
| | - Lucas Rodrigues Pinheiro
- Department of Radiology, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227, São Paulo, SP, 05508-000, Brazil
| | - Fernanda Cristina Sales Salineiro
- Department of Radiology, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227, São Paulo, SP, 05508-000, Brazil
| | - Fausto Medeiros Mendes
- Department of Pediatric Dentistry, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227, São Paulo, SP, 05508-000, Brazil
| | - João Batista César Neto
- Department of Periodontology, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227, São Paulo, SP, 05508-000, Brazil
| | - Marcelo Gusmão Paraíso Cavalcanti
- Department of Radiology, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227, São Paulo, SP, 05508-000, Brazil
| | - Cláudio Mendes Pannuti
- Department of Periodontology, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227, São Paulo, SP, 05508-000, Brazil.
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Sharma G, Gn KK, Khatri K, Singh R, Gamanagatti S, Sharma V. Morphology of the posteromedial fragment in pertrochanteric fractures: A three-dimensional computed tomography analysis. Injury 2017; 48:419-431. [PMID: 27903406 DOI: 10.1016/j.injury.2016.11.010] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Revised: 10/20/2016] [Accepted: 11/16/2016] [Indexed: 02/09/2023]
Abstract
BACKGROUND In this study we describe the morphology of the posteromedial fragment in pertrochanteric fractures using 3D CT scans and answer two questions 1) Do differences exist between the 3D CT appearances of posteromedial fragments and the depictions made in the AO classification 2) Does the posteromedial fragment affect stability in pertrochanteric fractures, in terms of fracture collapse? METHODS Preoperative CT scans of eight 31-A1 and fifty 31-A2 fractures were analysed. The presence of PM fragment, its fragmentation, greater trochanter (GT) involvement, lesser trochanter (LT) fragment size (in terms of its posterior and medial extent as well as LT length), LT fragment displacement (in terms of medial displacement and rotation) were determined. All fractures were treated with a DHS. Fracture collapse was determined on postoperative radiographs. The relationship between fracture collapse and patient factors including age, gender, fracture type (A1 versus A2), characteristics of the posteromedial fragment, and the presence of a lateral wall fracture were determined. RESULTS Three out of eight 31-A1 fractures demonstrated a separate GT fragment (three part fracture). Out of the 50 31-A2 fractures, 12 had a single PM fragment, which included the LT and GT in continuity. The more common four part fractures seem to form by further fragmentation of this basic form. In A2 fractures, the GT was almost always broken and the broken fragment comprised a mean 56% of normal GT. The LT fragment involved an average of 74% of the posterior wall, and an average of 36% of the medial wall of the proximal femur. Larger LT fragments were less displaced as compared to smaller fragments. Univariate regression analyses revealed that fracture collapse was significantly correlated with fracture type (A1 versus A2, p 0.036), GT size (p 0.002) and the presence of a lateral wall fracture (p<0.001). CONCLUSIONS This study revealed some important differences between the 3D CT appearances and AO classification of pertrochanteric fractures. Further, neither fragmentation of the posteromedial fragment, nor the size of the lesser trochanter fragment was found to predict stability in pertrochanteric fractures. A perioperative lateral wall fracture is the main determinant of stability in these fractures.
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Affiliation(s)
- Gaurav Sharma
- Jai Prakash Narayan Apex Trauma Centre, All India Institute of Medical Sciences, India.
| | | | | | - Ravijot Singh
- Jai Prakash Narayan Apex Trauma Centre, All India Institute of Medical Sciences, India
| | - Shivanand Gamanagatti
- Jai Prakash Narayan Apex Trauma Centre, All India Institute of Medical Sciences, India
| | - Vijay Sharma
- Jai Prakash Narayan Apex Trauma Centre, All India Institute of Medical Sciences, India
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The impact of different cone beam computed tomography and multi-slice computed tomography scan parameters on virtual three-dimensional model accuracy using a highly precise ex vivo evaluation method. J Craniomaxillofac Surg 2016; 44:632-6. [DOI: 10.1016/j.jcms.2016.02.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 01/15/2016] [Accepted: 02/04/2016] [Indexed: 11/20/2022] Open
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A new, highly precise measurement technology for the in vitro evaluation of the accuracy of digital imaging data. J Craniomaxillofac Surg 2015; 43:1335-9. [DOI: 10.1016/j.jcms.2015.06.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Revised: 05/24/2015] [Accepted: 06/17/2015] [Indexed: 12/31/2022] Open
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Whitesides LM, Aslam-Pervez N, Warburton G. Cone-Beam Computed Tomography Education and Exposure in Oral and Maxillofacial Surgery Training Programs in the United States. J Oral Maxillofac Surg 2015; 73:522-8. [DOI: 10.1016/j.joms.2014.10.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Revised: 09/30/2014] [Accepted: 10/04/2014] [Indexed: 10/24/2022]
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