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Narahara S, Morita Y, Shido R, Yoshida N, Ohba S. Comparison of the skeletal stability after mandibular counter-clockwise rotation in three surgical procedures. Odontology 2024; 112:640-646. [PMID: 37880466 DOI: 10.1007/s10266-023-00860-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Accepted: 09/24/2023] [Indexed: 10/27/2023]
Abstract
The treatment of mandibular deformities with an anterior open bite is challenging. In this study, skeletal stability after mandibular osteotomies was evaluated to determine the best treatment for mandibular prognathism with an anterior open bite in three procedures: intraoral vertical ramus osteotomy (IVRO), conventional sagittal split ramus osteotomy (conv-SSRO), and SSRO without bone fixation (nonfix-SSRO). Patients who underwent mandibular osteotomy to correct skeletal mandibular protrusion were included. Changes in skeletal and soft tissues were assessed using lateral cephalograms taken before (T1), 3 ± 2 days (T2), and 12 ± 3 months (T3) after surgery. Thirty-nine patients were included: nine in the IVRO group and 11 and 19 in the conv- and nonfix-SSRO groups, respectively. The mandibular plane angles (MPAs) of the T2-T1 were - 2.7 ± 2.0 (p = 0.0040), - 3.7 ± 1.7 (p < 0.0001), and - 2.3 ± 0.7 (p < 0.0001) in the IVRO, conv-SSRO, and nonfix-SSRO groups, respectively. The skeletal relapse of the MPAs was not related to the MPA at T2-T1, and it was approximately 1.3° in the conv-SSRO group. The skeletal relapse of the MAPs was significantly correlated with the MPA of T2-T1 in the IVRO (p = 0.0402) and non-fix-SSRO (p = 0.0173) groups. When the relapse of the MPAs was less than 1.3°, the MPA of T2-T1 was calculated as 2.5° in the nonfix-SSRO group. When the MPA of T2-T1 is less than 2.5°, non-fix SSRO may produce a reliable outcome, and when it is more than 2.5°, conv-SSRO may produce better outcomes.
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Affiliation(s)
- Shun Narahara
- Department of Regenerative Oral Surgery, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, 852-8588, Japan
| | - Yukiko Morita
- Department of Orthodontics and Dentofacial Orthopedics, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, 852-8588, Japan
| | - Rena Shido
- Department of Regenerative Oral Surgery, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, 852-8588, Japan
| | - Noriaki Yoshida
- Department of Orthodontics and Dentofacial Orthopedics, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, 852-8588, Japan
| | - Seigo Ohba
- Department of Regenerative Oral Surgery, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, 852-8588, Japan.
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Kuharattanachai K, Jotikasthira D, Rangsri W, Tripuwabhrut K. Effect of occlusal hypofunction on centre of resistance in maxillary central incisor using the finite element method. J Orthod 2024; 51:19-27. [PMID: 37269106 DOI: 10.1177/14653125231176575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVES To determine differences in the location of centre of resistance (Cres) between functional and hypofunctional teeth and to evaluate the relationship between the pulp cavity volume and locations of the Cres, using the finite element (FE) method. DESIGN Retrospective cohort study. PARTICIPANTS FE models of right maxillary central incisor, derived from cone-beam computed tomography (CBCT) images of 46 participants, were divided into normal function (n = 23) and hypofunction (n = 23) groups using anterior overbite and cephalometric measurements. METHODS Measurements of the tooth and pulp cavity volume were made from the CBCT. Cres levels were presented as percentages of the root length from the root's apex. All data were analysed and compared using the independent t-test (P < 0.05). The relationship between the location of Cres and volume ratios were evaluated statistically. RESULTS The means of the pulp cavity/tooth volume and root canal/ root volume ratio of the maxillary central incisor in the anterior open bite group were significantly greater than those in the normal group. The average location of Cres in the anterior open bite group was 0.6 mm (3.7%) apically from the normal group, measured from root apex. The difference was statistically significant (P < 0.01). There was a significant correlation between root canal/root volume ratio and locations of Cres (r = -0.780, P < 0.001). CONCLUSIONS The Cres in the hypofunctional group was located more apical than the functional group. As the pulp cavity volume increased, the level of Cres shifted apically.
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Affiliation(s)
- Kachaphol Kuharattanachai
- Department of Orthodontics and Pediatric Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Dhirawat Jotikasthira
- Department of Orthodontics and Pediatric Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Wetchayan Rangsri
- Department of Mechanical Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai, Thailand
| | - Kanich Tripuwabhrut
- Department of Orthodontics and Pediatric Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
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Bharadwaj A, Ahuja S, Bhambri E, Gupta S, Uppal J. A 3D Finite Element Analysis of biomechanical effects on teeth and bone during true intrusion of posteriors using miniscrews. Int Orthod 2024; 22:100819. [PMID: 37864876 DOI: 10.1016/j.ortho.2023.100819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 09/24/2023] [Accepted: 10/02/2023] [Indexed: 10/23/2023]
Abstract
OBJECTIVE The primary objective of this study was to investigate the biomechanical effects and stresses on bone, PDL, cementum and displacement along X-,Y- and Z-axis during true intrusion of molars using mini-implants with finite element analysis; the secondary objective of the study was to find out the best method for posterior intrusion in clinical practice. MATERIAL AND METHODS A 3D finite element method was used to simulate true molar intrusion using sliding mechanics. Two groups were made, with mini-implants placed on buccal side and palatal side with a cap splint for MODEL1, and a single mini-implant placed buccally with transpalatal arch (TPA) for MODEL2. The material characteristics which include the Young's modulus and Poison's ratio were assigned. von Mises stress, principal stress on PDL and alveolar bone, displacements in all the 3 planes were determined. RESULTS Bone stress patterns showed compressive stresses on the buccal aspect and tensile stresses on the palatal aspect for both MODELS. Stresses in the PDL and cementum were mainly concentrated in the apex region, with a more uniform distribution of stresses for MODEL 1. Tooth displacement showed true intrusion for both MODELS, i.e. the Z axis, and a more controlled buccal tipping for MODEL 1. CONCLUSION Of the modalities compared, the best controlled tooth movements for posterior intrusion in the treatment of open bite were obtained with mini-implants placed with a cap splint (MODEL 1).
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Affiliation(s)
- Ankit Bharadwaj
- Surendera Dental College and Research Institute, Rajasthan University of Health Sciences, Department of Orthodontics and Dentofacial Orthopaedics, Sri Ganganagar, Rajasthan 335001, India
| | - Sachin Ahuja
- Surendera Dental College and Research Institute, Rajasthan University of Health Sciences, Department of Orthodontics and Dentofacial Orthopaedics, Sri Ganganagar, Rajasthan 335001, India
| | - Eenal Bhambri
- Surendera Dental College and Research Institute, Rajasthan University of Health Sciences, Department of Orthodontics and Dentofacial Orthopaedics, Sri Ganganagar, Rajasthan 335001, India
| | - Seema Gupta
- A.C.P.M Dental College, Maharashtra University of Health Sciences, Department of Orthodontics and Dentofacial Orthopaedics, Dhule, Maharashtra 424002, India
| | - Japjee Uppal
- Surendera Dental College and Research Institute, Rajasthan University of Health Sciences, Department of Prosthodontics and Crown and Bridge, Sri Ganganagar, Rajasthan 335001, India.
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Broutin A, K Bidi-Lebihan A, Canceill T, Vaysse F, Bloch-Zupan A, Bailleul-Forestier I, Noirrit-Esclassan E. Association between malocclusions and amelogenesis imperfecta genotype and phenotype: A systematic review. Int Orthod 2023; 21:100789. [PMID: 37494776 DOI: 10.1016/j.ortho.2023.100789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 06/19/2023] [Accepted: 06/24/2023] [Indexed: 07/28/2023]
Abstract
INTRODUCTION The aim of this systematic review (Prospero CRD42022323188) is to investigate whether an association exists in patients with amelogenesis imperfecta (AI) between occlusal characteristics and genotype on the one hand and enamel structural phenotype on the other. MATERIAL AND METHODS Reports up to May 2023 assessing occlusion of individuals with AI were browsed in a systematic search using Medline, Embase, ISI Web of Science, and the grey literature. Randomised control trials, case control studies, and case series specifying both occlusion, assessed by cephalometric or clinical analysis, and genotype or dental phenotype in patients with AI were included without any age limitation. Two authors independently selected the publications and extracted the data in accordance with the PRISMA statement. The risk of bias was assessed with the Critical Appraisal Checklists from the Johanna Briggs Institute. RESULTS Twenty-five articles were chosen from the 261 results. Most of the included publications were case series (n=22) and case control studies (n=3). Thirteen studies reported both a genotype (ENAM, FAM83H, FAM20A, DLX3, CNMM4, WDR72) and occlusal diagnostic. The methodological quality of the studies was moderate. All AI phenotypes showed an open bite (OB) rate around 35%, except mixed form. The other malocclusions were not often mentioned. No correlation between occlusal phenotype and genotype or AI phenotype could be identified in patients with AI, as most studies had short occlusal descriptions and small sample sizes. CONCLUSION OB malocclusions were more frequently reported in AI. This review highlighted the need for a more accurate description of orofacial features associated with AI, to better clarify the role of amelogenesis genes in the regulation of craniofacial morphogenesis and identify patients requiring orthognathic surgery at an early stage.
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Affiliation(s)
- Alice Broutin
- Paediatric Dentistry Unit, CHU de Toulouse, University Toulouse III, Toulouse, France; Team IDEA: identification, environments et anthropometry, UMR 5288, CAGT - Centre for Anthropobiology and Genomics of Toulouse. University Paul-Sabatier Toulouse III, Toulouse, France
| | - Angélique K Bidi-Lebihan
- Team IDEA: identification, environments et anthropometry, UMR 5288, CAGT - Centre for Anthropobiology and Genomics of Toulouse. University Paul-Sabatier Toulouse III, Toulouse, France
| | - Thibault Canceill
- Inserm, In COMM (Intestine ClinicOmics Microbiota & Metabolism), UMR 1297, Toulouse, France
| | - Frédéric Vaysse
- Paediatric Dentistry Unit, CHU de Toulouse, University Toulouse III, Toulouse, France; Team IDEA: identification, environments et anthropometry, UMR 5288, CAGT - Centre for Anthropobiology and Genomics of Toulouse. University Paul-Sabatier Toulouse III, Toulouse, France; Competence Centre of Oral Diseases, CHU de Toulouse, Toulouse, France
| | - Agnès Bloch-Zupan
- Reference Centre of Oral Diseases, CHU de Strasbourg, Strasbourg, France; Inserm U964, institut de génétique et de biologie moléculaire et cellulaire (IGBMC), UMR7104 CNRS-ULP, Strasbourg, France
| | - Isabelle Bailleul-Forestier
- Team IDEA: identification, environments et anthropometry, UMR 5288, CAGT - Centre for Anthropobiology and Genomics of Toulouse. University Paul-Sabatier Toulouse III, Toulouse, France; Competence Centre of Oral Diseases, CHU de Toulouse, Toulouse, France
| | - Emmanuelle Noirrit-Esclassan
- Team IDEA: identification, environments et anthropometry, UMR 5288, CAGT - Centre for Anthropobiology and Genomics of Toulouse. University Paul-Sabatier Toulouse III, Toulouse, France; Competence Centre of Oral Diseases, CHU de Toulouse, Toulouse, France; Inserm, UMR1297 I2MC, Toulouse, France.
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Angelos GM. Perfecting the venerable SSC. J Clin Pediatr Dent 2023; 47:1-3. [PMID: 37732429 DOI: 10.22514/jocpd.2023.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 01/06/2023] [Indexed: 09/22/2023] Open
Abstract
Stainless steel crowns (SSCs) are the preferred restoration of pediatric dentists for children requiring a pediatric dental rehabilitation due to their low cost and durability. Despite low technique sensitivity SSC placement can be challenging in some clinical situations including when placed on primary canines. Primary canines restored with SSCs often result in premature contacts and posterior open bite making acquiring an "as the patient presented" (ATPP) occlusion difficult when providing a pediatric dental rehabilitation. Opening of the posterior occlusion due to premature canine contact in a dental rehabilitation is often viewed as unavoidable. This technique article describes a simple method to address this clinical situation and reviews basic principles and techniques for placing SSCs.
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Sharab L, Kutkut A, Van Sickels J. Interdisciplinary management of an adult orthodontic patient: a case report and literature review. Gen Dent 2023; 71:48-57. [PMID: 36825974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The purposes of this case report are to describe the course of treatment for a 29-year-old woman with a chief complaint of spaces in her dentition and to review relevant clinical topics in the literature. The primary etiology of the spacing in this case was a congenitally missing maxillary right lateral incisor and a peg-shaped maxillary left lateral incisor. The clinical diagnosis included skeletal and dental discrepancies in all 3 planes of space; a skeletal and dental open bite; a high and asymmetric smile line with a skeletal occlusal cant; a Class II dental occlusion; a Class III skeletal tendency; and insufficient space for standard-size restoration of the maxillary lateral incisors. A history of poor oral hygiene, multiple restorations, and tooth wear were added challenges. The patient initially requested minimal esthetic procedures. However, during the course of treatment, she changed her treatment goals to achieve optimal esthetics. The case required a multidisciplinary planning approach. This report highlights treatment options, outcomes, and avoidable mistakes for this type of complex case involving high esthetic demands. Additionally, key factors are identified to achieve successful treatment and patient satisfaction.
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Oliver S, Keyser MMB, Jhingree S, Bocklage C, Lathrop H, Giduz N, Moss K, Blakey G, White R, Turvey T, Mielke J, Zajac D, Jacox LA. Impacts of anterior-posterior jaw disproportions on speech of dentofacial disharmony patients. Eur J Orthod 2023; 45:1-10. [PMID: 36308520 PMCID: PMC9912703 DOI: 10.1093/ejo/cjac057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND/OBJECTIVES Articulation problems impact communication, development, and quality of life, and are diagnosed in 73-87% of patients with Class II Dentofacial Disharmony (DFD). We evaluated whether differences exist in stop (/t/ or/k/), fricative (/s/ or/ʃ/), and affricate (/tʃ/) consonant sounds of Class II DFD subjects, and whether extent of malocclusion correlates with severity of speech distortion. We hypothesized that Class II patients display milder distortions than Class III and anterior open bite (AOB), as Class II patients can posture into a Class I occlusion. MATERIALS/METHODS Audio and orthodontic records were collected from DFD patients (N = 53-Class II, 102-Class III, 72-Controls) who were pursuing orthodontics and orthognathic surgery. A speech pathologist perceptually scored speech. Acoustic differences in recordings were measured using Spectral Moment Analysis. RESULTS When Class II subjects were compared to controls, significant differences were found for the centroid frequency (M1) of the /s/ sound and the spectral spread (M2) of /t/, /tʃ/, and /s/ sounds, with pairwise significance for controls relative to Class II AOB and all Class II subjects. Class II AOB subjects had higher M1 and M2 values than patients with Class II closed bites and Class I controls for most sounds. When comparing across anterior-posterior (AP) groups, differences exist between controls, Class II and III DFD subjects for M1 of /t/, /tʃ/, and/ʃ/ and M2 for /t/, /tʃ/, /s/, and /ʃ/ sounds. Using linear regression, correlations between Class II and III severity and spectral measures were found for /t/ and /tʃ/ sounds. CONCLUSIONS/IMPLICATIONS Class II and III patients have a higher prevalence of qualitative distortions and spectral changes in consonants compared to controls, but Class II spectral shifts are smaller and affect fewer sounds than in Class III and AOB cohorts. Linear correlations between AP discrepancy and spectral change suggest causation and that treatment may improve articulation problems.
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Affiliation(s)
- Steven Oliver
- Division of Craniofacial and Surgical Care, Orthodontics Group, Adams School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
| | - Mary Morgan Bitler Keyser
- Division of Craniofacial and Surgical Care, Orthodontics Group, Adams School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
| | - Samantha Jhingree
- Division of Craniofacial and Surgical Care, Orthodontics Group, Adams School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
| | - Clare Bocklage
- Division of Craniofacial and Surgical Care, Orthodontics Group, Adams School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
| | - Hillary Lathrop
- Division of Craniofacial and Surgical Care, Orthodontics Group, Adams School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
| | - Natalie Giduz
- Division of Craniofacial and Surgical Care, Orthodontics Group, Adams School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
| | - Kevin Moss
- Division of Oral and Craniofacial Health Sciences, Adams School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
| | - George Blakey
- Division of Craniofacial and Surgical Care, Oral Surgery Group, Adams School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
| | - Raymond White
- Division of Craniofacial and Surgical Care, Oral Surgery Group, Adams School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
| | - Timothy Turvey
- Division of Craniofacial and Surgical Care, Oral Surgery Group, Adams School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
| | - Jeff Mielke
- North Carolina State University, English Department, Tompkins Hall, Raleigh, NC, USA
| | - David Zajac
- Division of Craniofacial and Surgical Care, Speech Pathology Group, Adams School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
| | - Laura Anne Jacox
- Division of Craniofacial and Surgical Care, Orthodontics Group, Adams School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
- Division of Oral and Craniofacial Health Sciences, Adams School of Dentistry, University of North Carolina, Chapel Hill, NC, USA
- UNC Adams School of Dentistry, 385 S Columbia St, Chapel Hill, NC 27599, USA
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Amr-Rey O, Sánchez-Delgado P, Salvador-Palmer R, Cibrián R, Paredes-Gallardo V. Association between malocclusion and articulation of phonemes in early childhood. Angle Orthod 2022; 92:505-511. [PMID: 35275982 DOI: 10.2319/043021-342.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 12/01/2021] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES To evaluate the relationship between dental malocclusion and speech to understand the etiology of speech sound disorders (SSD) in schoolchildren and to make a correct diagnosis and treatment plan. MATERIALS AND METHODS Articulation and dental occlusion, oromyofunctional evaluation with orofacial praxis and musculature, resting tongue position, and swallowing pattern were analyzed in 290 schoolchildren between the ages of 4 and 7 years. Statistical tests were considered significant for P < .05. RESULTS A significant association between dental malocclusions (Angle Class II and III, anterior open bite, edge-to-edge bite, overjet and anterior crossbite) and phonetic alterations (P = .008) was observed. Sigmatisms and rhotacisms were the most frequent disorders. Malocclusions also showed a significant association with oral habits and with orofacial praxis and muscle activity. CONCLUSIONS The presence of malocclusion can cause imbalances in the functions involved in the stomatognathic system. Awareness of this relationship in young children would help professionals to implement preventive measures for the optimum development of children's oral health.
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Alhadad A, Aldhorae K, Al Moaleem MM, Al-Labani MA, Kofiyh KA, ALjawfi K, Abdulrab AMM, Alraawi MA, Alshakhs NM, Alqahtani MS, Altawili ZM. Epidemiology of Facial Profiles, Occlusal Features, and Orthodontic Treatment Need among Adolescence: A Cross-sectional Study. J Contemp Dent Pract 2022; 23:313-319. [PMID: 35781436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
AIMS This study aimed to investigate the incidence and severity of malocclusion and orthodontic treatment needs among randomly selected high school students. METHODS A multistage stratified random-sampling study was conducted on 1,036 high school students in Sana'a city. The World Dental Federation and World Health Organization method of occlusal traits and the index of orthodontic treatment need were adopted for measurements. Clinically, the molar relationship and facial profile were examined. Assessment of whether examiner or subject perceived the need for orthodontic treatment was made using the esthetic component index. All data were analyzed using the Chi-square test with a significance level of p <0.05. RESULTS Normal, convex, and concave facial-profile measurements were found in 81.9, 12.1, and 6.15% of sampled students, respectively. Asymmetrical molar relationship was observed in 16.1% of samples, and most of them were of class I/class II relationships. Increased overjet was noticed in 90.9% of students. Anterior crossbite, deepbite, anterior openbite, posterior openbite, posterior crossbite, and scissor bite accounted for 12.2, 12.8, 3.5, 1.3, 6.6, and 0.6%, respectively. According to the index orthodontic treatment need, 38.9% of students needed some form of orthodontic treatment. Among these cases, 24.3% "definitely" needed treatment, and 59.9% of students needed orthodontic treatment. CONCLUSION Our findings suggested a call for a more conservative treatment approach in dealing with malocclusion problems among high school students in all zones of Sana'a governorate, Yemen. CLINICAL SIGNIFICANCE A limited number of surveys were performed in Sana'a Governorate to investigate orthodontic treatment needs, facial profiles, and occlusal features among adolescents. The results of this study could guide us to develop a preventive system that minimizes its adverse effects and the need for costly orthodontic treatments.
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Affiliation(s)
- Abdulwahab Alhadad
- Faculty of Dentistry, University of Science and Technology, Sana'a, Yemen
| | - Khalid Aldhorae
- Orthodontic Department, Faculty of Dentistry, Thamar University, Thamar, Yemen; Faculty of Dentistry, University of Ibn al-Nafis for Medical Sciences, Sana'a, Yemen
| | - Mohammed M Al Moaleem
- Department of Prosthetic Dental Science, College of Dentistry, Jazan University, Jazan, Saudi Arabia; Faculty of Dentistry, University of Ibn al-Nafis for Medical Sciences, Sana'a, Yemen
| | - Mohammed A Al-Labani
- Orthodontic Department, Faculty of Dentistry, University of Science and Technology, Sana'a, Yemen
| | - Kadejh A Kofiyh
- University of Ibn Sina National College, Jeddah, Saudi Arabia
| | - Khalid ALjawfi
- Department of Biological and Preventive Sciences, Faculty of Dentistry, University of Science and Technology, Sana'a, Yemen
| | - Ali Mohammed M Abdulrab
- Department of Prosthetic Dental Science, College of Dentistry, Jazan University, Jazan, Saudi Arabia; Faculty of Dentistry, University of Ibn al-Nafis for Medical Sciences, Sana'a, Yemen, e-mail:
| | - Mohammed A Alraawi
- Department of Orthodontics, College of Dentistry, University of Hatay Mustafa Kemal, Antakya, Turkey
| | | | | | - Zainab M Altawili
- Faculty of Dentistry, University of Science and Technology, Sana'a, Yemen
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Akl HE, El-Beialy AR, El-Ghafour MA, Abouelezz AM, El Sharaby FA. Root resorption associated with maxillary buccal segment intrusion using variable force magnitudes. Angle Orthod 2021; 91:733-742. [PMID: 34270689 PMCID: PMC8549556 DOI: 10.2319/012121-62.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Accepted: 05/01/2021] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES To compare the root resorption resulting from miniscrew-supported maxillary posterior dentoalveolar intrusion using two different force magnitudes. MATERIALS AND METHODS Adult patients with skeletal open bite, indicated for maxillary posterior dentoalveolar intrusion, were recruited and randomly assigned to the comparison or intervention groups. The comparison group involved applying 200 g of intrusive force per segment, which measured 20 g per root, while this force was 400 g per segment in the intervention group, measuring 40 g per root. RESULTS Twenty participants were included in the final analysis after 2 patients dropped out, 1 in each group, to end up with 10 subjects (200 roots) per group. There was statistically significant root resorption of 0.84 ± 0.96 mm and 0.93 ± 1.00 mm in the comparison and the intervention groups, respectively. However, there was no statistically significant difference between the groups. CONCLUSIONS Root resorption inevitably took place in association with orthodontic intrusion. However, increasing the magnitude of the intrusive force did not increase the amount of root resorption, either statistically or clinically.
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Gross AM, Frech DK. Treatment of open-bite tendency with a miniscrew-supported transpalatal arch and myofunctional exercises. J Clin Orthod 2021; 55:51-514. [PMID: 34464335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Affiliation(s)
| | - Devek K Frech
- College of Dentistry, Texas A&M University, Dallas, TX; Private Practice of Orthodontics, Wichita Falls, TX
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Alassiry AM. Prevalence of Malocclusion Traits in Saudi Males Seeking Orthodontic Treatment in Najran in Saudi Arabia. J Contemp Dent Pract 2020; 21:686-690. [PMID: 33025940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
AIM To study the prevalence of different malocclusion traits in Najran in Saudi adolescents and adults seeking orthodontic treatment in Najran in Saudi Arabia. MATERIALS AND METHODS Two hundred and fifty male patients in the age group of 12-35 years who visited faculty of dentistry in Najran University for orthodontic treatment were examined and were divided into two age groups, adolescents and adults. The patients were examined and classified into Class I, Class II, and Class III malocclusions. They were also examined for overjet, overbite, open bite, crossbite, scissor's bite, crowding, and spacing. RESULTS The prevalence of Angle's malocclusion Classes I, II, and III was 52.8%, 31.6%, and 15.6%, respectively. The most common anomaly was moderate overbite followed by lateral open bite. Posterior crossbite was found to be more prevalent than anterior crossbite. CONCLUSION Angle's Class I malocclusion was most prevalent type, followed by Class II, and then Class III. CLINICAL SIGNIFICANCE The findings of this study can be used to formulate an appropriate preventive and orthodontic treatment measures pertaining to the population of adolescent and adult Saudi males.
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Affiliation(s)
- Ahmed M Alassiry
- Department of Preventive Dental Sciences, Faculty of Dentistry, Najran University, Najran, Kingdom of Saudi Arabia, Phone: +966504135127, e-mail:
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Boss H, Park JH, Carlotti A, Papademetriou M, Grubb J. Mandibular micrognathia and vertical maxillary excess correction with combination LeFort I and inverted L osteotomies. Am J Orthod Dentofacial Orthop 2020; 157:704-718. [PMID: 32354443 DOI: 10.1016/j.ajodo.2019.02.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 02/01/2019] [Accepted: 02/01/2019] [Indexed: 11/19/2022]
Abstract
A 34-year-old woman with mandibular micrognathia, vertical maxillary excess, and an open bite characterized by a "bird-face" deformity was treated with orthodontics combined with LeFort I and bilateral inverted L osteotomies. The total treatment time was 16 months. Her occlusion and facial appearance were significantly improved by a surgical-orthodontic plan. This case report presents the discussion of a unique and complex orthognathic surgical case and the myriad of orthodontic and surgical considerations that it involved.
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Affiliation(s)
- Hunter Boss
- Private Practice, Austin, Tex; Graduate School of Dentistry, Kyung Hee University, Seoul, Korea
| | - Jae Hyun Park
- Graduate School of Dentistry, Kyung Hee University, Seoul, Korea; Postgraduate Orthodontic Program, Arizona School of Dentistry & Oral Health, A.T. Still University, Mesa, Ariz.
| | - Albert Carlotti
- Private Practice, Austin, Tex; Postgraduate Orthodontic Program, Arizona School of Dentistry & Oral Health, A.T. Still University, Mesa, Ariz
| | - Michael Papademetriou
- Postgraduate Orthodontic Program, Arizona School of Dentistry & Oral Health, A.T. Still University, Mesa, Ariz
| | - John Grubb
- Postgraduate Orthodontic Program, Arizona School of Dentistry & Oral Health, A.T. Still University, Mesa, Ariz
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Tawil P, Boufassa M. Segmental Osteotomy in the Correction of an Anterior Open Bite: A Case Report. Compend Contin Educ Dent 2020; 41:218-223. [PMID: 32255653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The management of an anterior open bite can be quite challenging and in some cases necessitate a multidisciplinary approach. In this case report, a patient presented with an anterior open bite with an ankylosed central incisor due to previous trauma. The open bite was corrected using conventional orthodontics, and the ankylosed incisor was repositioned in the correct tridimensional position using a segmental osteotomy. The repositioned bone block required 5 months of stabilization, and the prosthetic rehabilitation of the anterior maxilla was completed using lithium-disilicate crowns. At 24 months the outcome was stable with no relapse and had an excellent pink and white esthetic score.
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Affiliation(s)
- Peter Tawil
- Diplomate, American Board of Periodontology; Private Practice limited to Periodontology, Oral Surgery, and Implant Dentistry, Beirut, Lebanon, and United Arab Emirates
| | - Mehand Boufassa
- Private Practice limited to Orthodontics, United Arab Emirates
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15
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Antelo OM, Meira TM, Oliveira DD, Pithon MM, Tanaka OM. Long-term stability of a Class III malocclusion with severe anterior open bite and bilateral posterior crossbite in a hyperdivergent patient. Am J Orthod Dentofacial Orthop 2020; 157:408-421. [PMID: 32115119 DOI: 10.1016/j.ajodo.2018.10.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 08/01/2018] [Accepted: 10/01/2018] [Indexed: 11/20/2022]
Abstract
Anterior open bite malocclusion is generally associated with several causes. This case report describes the 2-phase treatment of a 13-year-old boy with a Class III malocclusion, severe anterior open bite, and bilateral posterior crossbite treated without surgical intervention. An orthopedic approach was performed in phase 1 with a hyrax-type palatal expander, followed by maxillary protraction with a facemask for a 10-month period to promote the correction of transverse and sagittal deviations. In phase 2, a comprehensive orthodontic approach using fixed preadjusted appliances associated with intermaxillary elastics was performed. These approaches, combined with good patient compliance, established a functional and esthetic occlusal relationship, normal overjet and overbite, and a well-balanced facial appearance. The 4.5-year follow-up indicated that treatment results were stable.
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Affiliation(s)
- Oscar Mario Antelo
- Graduate Dentistry Program, School of Life Sciences, Pontifical Catholic University of Paraná, Curitiba, Brazil
| | - Thiago Martins Meira
- Graduate Dentistry Program, School of Life Sciences, Pontifical Catholic University of Paraná, Curitiba, Brazil
| | - Dauro Douglas Oliveira
- Department of Orthodontics, Pontifical Catholic University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | - Orlando Motohiro Tanaka
- Graduate Dentistry Program, School of Life Sciences, Pontifical Catholic University of Paraná, Curitiba, Brazil.
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Lutz JC, Nicot R, Schlund M, Schaefer E, Bornert F, Fioretti F, Ferri J. Dental and maxillofacial features of Noonan Syndrome: Case series of ten patients. J Craniomaxillofac Surg 2020; 48:242-250. [PMID: 32113883 DOI: 10.1016/j.jcms.2020.01.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 01/22/2020] [Accepted: 01/26/2020] [Indexed: 12/28/2022] Open
Abstract
Noonan syndrome (NS) is a relatively common congenital multiple-anomaly syndrome, resembling Turner syndrome, but without chromosomal anomaly. Besides the unusual facies, the maxillofacial and dental features of patients with NS are not well-summarized in the literature. The aim of this study was to describe these features and propose specific treatment guidelines for practitioners involved in oral and maxillofacial care. A retrospective multicentric study was conducted of 14 patients who were referred for NS screening. In total, 10 patients were found to carry a mutation involved in NS or NS-related disorders. Fifty percent of the mutations affected PTPN11. All patients presented with the typical extraoral features, such as macrocephaly, hypertelorism, ptosis, triangular face shape and ear dystrophy. Intraoral manifestations, including malocclusion (maxillary transversal deficiency, crossbite, anterior open-bite and class II malocclusion), dental anomalies (delayed eruption, agenesis and dystrophy, odontoma) and radiologic jaw lesions were identified in five out of 10 patients. These findings were searched in a review of the literature to obtain a comprehensive description of oral and maxillofacial features in patients with NS. The proposed treatment guidelines emphasize frequent coagulation anomalies that need to be considered prior to surgery. Early dental assessment and yearly follow-up with oral prophylaxis are recommended. Orthodontics and orthognathic surgery are also of primary importance in the management of NS patients.
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Affiliation(s)
- Jean-Christophe Lutz
- Oral and Maxillofacial Surgery Department, Strasbourg University Hospital, 1 avenue Molière, 67098, Strasbourg cedex, France; University of Strasbourg, Faculty of Medicine, 8 rue Kirschleger, 67000, Strasbourg, France; INSERM (French National Institute of Health and Medical Research), "Regenerative Nanomedicine" Laboratory, UMR 1260, Faculté de Médecine, FMTS, 67085, Strasbourg cedex, France.
| | - Romain Nicot
- Oral and Maxillofacial Surgery Department, Roger Salengro Hospital, Avenue du Professeur Emile Laine, 59037, Lille, France; Université Lille 2 Droit et Santé, 1 Pl. de Verdun, 59000, Lille, France; INSERM U1008, Controlled Drug Delivery Systems and Biomaterials, Faculté de Pharmacie, 3, rue du Professeur Laguesse, BP83, 59006, Lille Cedex, France
| | - Matthias Schlund
- Oral and Maxillofacial Surgery Department, Roger Salengro Hospital, Avenue du Professeur Emile Laine, 59037, Lille, France; Université Lille 2 Droit et Santé, 1 Pl. de Verdun, 59000, Lille, France
| | - Elise Schaefer
- University of Strasbourg, Faculty of Medicine, 8 rue Kirschleger, 67000, Strasbourg, France; Medical Genetics Department, Strasbourg University Hospital, 1 avenue Molière, 67098, Strasbourg cedex, France
| | - Fabien Bornert
- INSERM (French National Institute of Health and Medical Research), "Regenerative Nanomedicine" Laboratory, UMR 1260, Faculté de Médecine, FMTS, 67085, Strasbourg cedex, France; Department of Dentistry / Oral Medicine and Oral Surgery, Strasbourg University Hospital, 1 Place de l'Hôpital, 67091, Strasbourg cedex, France; University of Strasbourg, Faculty of Dentistry, 8 rue Sainte Elisabeth, 67000, Strasbourg, France
| | - Florence Fioretti
- INSERM (French National Institute of Health and Medical Research), "Regenerative Nanomedicine" Laboratory, UMR 1260, Faculté de Médecine, FMTS, 67085, Strasbourg cedex, France; Department of Dentistry / Oral Medicine and Oral Surgery, Strasbourg University Hospital, 1 Place de l'Hôpital, 67091, Strasbourg cedex, France; University of Strasbourg, Faculty of Dentistry, 8 rue Sainte Elisabeth, 67000, Strasbourg, France
| | - Joël Ferri
- Oral and Maxillofacial Surgery Department, Roger Salengro Hospital, Avenue du Professeur Emile Laine, 59037, Lille, France; Université Lille 2 Droit et Santé, 1 Pl. de Verdun, 59000, Lille, France; INSERM U1008, Controlled Drug Delivery Systems and Biomaterials, Faculté de Pharmacie, 3, rue du Professeur Laguesse, BP83, 59006, Lille Cedex, France
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Peter E, Monisha J, Baiju RM, Suja AG. Anterior open bite correction: Do perceived impacts match normative outcomes? Am J Orthod Dentofacial Orthop 2020; 157:143. [PMID: 32005458 DOI: 10.1016/j.ajodo.2019.10.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 09/30/2019] [Accepted: 10/24/2019] [Indexed: 11/17/2022]
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Pithon MM, Baraúna Magno M, da Silva Coqueiro R, Martins de Paiva S, Marques LS, Paranhos LR, Tanaka OM, Maia LC. Authors' response. Am J Orthod Dentofacial Orthop 2020; 157:144-145. [PMID: 32005459 DOI: 10.1016/j.ajodo.2019.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 10/30/2019] [Accepted: 11/02/2019] [Indexed: 11/18/2022]
Affiliation(s)
- Matheus Melo Pithon
- Rio de Janeiro, Jequié, Belo Horizonte, Diamantina, Uberlândia, and Curitiba, Brazil
| | - Marcela Baraúna Magno
- Rio de Janeiro, Jequié, Belo Horizonte, Diamantina, Uberlândia, and Curitiba, Brazil
| | | | - Saul Martins de Paiva
- Rio de Janeiro, Jequié, Belo Horizonte, Diamantina, Uberlândia, and Curitiba, Brazil
| | - Leandro Silva Marques
- Rio de Janeiro, Jequié, Belo Horizonte, Diamantina, Uberlândia, and Curitiba, Brazil
| | - Luiz Renato Paranhos
- Rio de Janeiro, Jequié, Belo Horizonte, Diamantina, Uberlândia, and Curitiba, Brazil
| | | | - Lucianne Cople Maia
- Rio de Janeiro, Jequié, Belo Horizonte, Diamantina, Uberlândia, and Curitiba, Brazil
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Brignardello-Petersen R. Treating anterior open bite with a fixed palatal crib in children aged 8 to 10 years probably results in an important improvement in oral health-related quality of life. J Am Dent Assoc 2020; 151:e24. [PMID: 31952679 DOI: 10.1016/j.adaj.2019.10.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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20
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Farronato M, Fama A, Lanteri V, Nucci F, Farronato G, Maspero C. Lymphangioma of the tongue associated with open bite: case report. Eur J Paediatr Dent 2019; 20:311-314. [PMID: 31850775 DOI: 10.23804/ejpd.2019.20.04.10] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
BACKGROUND Lymphangioma of the tongue is a rare condition related to congenital malformations of the lymphatic system. It may have different implications such as macroglossia. This condition could exacerbate in aesthetic abnormalities and functional problems such as maxillofacial structural deformities, dysphagia, airway obstruction and speech difficulties. The aim of this paper is to describe this disease by means of a case report. CASE REPORT A 4-year-old patient was referred to our department presenting macroglossia, functional difficulty during swallowing and mastication, speech disturbances, airway obstruction, and deformities of the maxillofacial structures. Diagnosis of lymphangioma was confirmed by biopsy. After surgical removal of the lesion, the patient was treated with rapid palatal expansion, functional appliance with lingual grid and fixed multibracket appliance. After treatment, improvement in function, indicated by the gradual increase in occlusal force, could be taken as a positive sign of stability. CONCLUSION The 3-step treatment protocol described in this article proves to be effective in controlling the malocclusion in the three planes of the space in a patient affected by lymphangioma of the tongue.
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Affiliation(s)
- M Farronato
- Fondazione IRCCS Ca'Granda, Ospedale Maggiore Policlinico, Milan - University of Milan, Milan, Italy
| | - A Fama
- Fondazione IRCCS Ca'Granda, Ospedale Maggiore Policlinico, Milan - University of Milan, Milan, Italy
| | - V Lanteri
- Fondazione IRCCS Ca'Granda, Ospedale Maggiore Policlinico, Milan - University of Milan, Milan, Italy
| | - F Nucci
- Fondazione IRCCS Ca'Granda, Ospedale Maggiore Policlinico, Milan - University of Milan, Milan, Italy
| | - G Farronato
- Fondazione IRCCS Ca'Granda, Ospedale Maggiore Policlinico, Milan - University of Milan, Milan, Italy
| | - C Maspero
- Fondazione IRCCS Ca'Granda, Ospedale Maggiore Policlinico, Milan - University of Milan, Milan, Italy
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Abstract
The correction of anterior open bite in the mixed dentition: treatment or over-treatment? Early treatment of the anterior open bite is a common, widespread treatment, which involves sometimes multiple clinical procedures: active orthodontic treatment and correction of the dysfunctional habits with a large waste of financial and biological costs. Therefore, also considering the significant possibility of self-improvement in the pre-pubertal phase, active early treatment should not aim to the active correction of the AOB, but only to other aspects of the malocclusion and to the interception of dysfunctional habits.
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Affiliation(s)
- M Rosa
- Insubria University in Varese, Italy
| | - V Quinzi
- Department of Life, Health and Environmental Sciences, Postgraduate School of Orthodontics, University of L'Aquila, L'Aquila, Italy
| | - G Marzo
- Department of Life, Health and Environmental Sciences, Postgraduate School of Orthodontics, University of L'Aquila, L'Aquila, Italy
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Ha SW, Choi JY, Baek SH. Correction of unilateral condylar hyperplasia and posterior open bite with proportional condylectomy and fixed orthodontic treatment. Angle Orthod 2019; 90:144-158. [PMID: 30741578 DOI: 10.2319/080818-585.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
A 29-year-old female patient with unilateral condylar hyperplasia (UCH) of the left side presented with facial asymmetry, maxillary transverse occlusal plane (MXTOP) cant, posterior open bite, and Class III relationship. Treatment consisted of proportional condylectomy of the left condyle for management of UCH, and fixed orthodontic treatment with intrusion of the left maxillary molars to correct the MXTOP cant and remaining chin point deviation (CPD). Proportional condylectomy with a 14-mm resection of the left condylar head improved the CPD from 11.5 mm to 7.8 mm and resolved the posterior open bite on the left side. However, it produced a Class II relationship on the right and left sides, posterior open bite on the right side, and anterior open bite. Fixed orthodontic treatment with 1.8-mm intrusion of the left maxillary molars using miniscrews corrected the MXTOP cant from 3.5 mm to 1.7 mm, reduced the remaining CPD from 7.8 mm to 3.7 mm, produced counterclockwise rotation of the mandible, and resolved the posterior open bite on the right side and the anterior open bite. After 16 months of total treatment, normal overbite/overjet and Class I relationship were obtained. Treatment results were well maintained after 5 years of retention. For the correction of UCH, it is important to determine the amount of condylar head resection and accurately simulate the correction of CPD and MXTOP cant through intrusion of the maxillary molars.
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Zupnik JT, Ioshida M, Yatabe M, Ruellas ACO, Gomes LR, Aronovich S, Benavides E, Edwards SP, Paniagua B, Cevidanes LHS. Three-dimensional analysis of condylar changes in surgical correction for open bite patients with skeletal class II and class III malocclusions. Int J Oral Maxillofac Surg 2019; 48:739-745. [PMID: 30712988 DOI: 10.1016/j.ijom.2019.01.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 11/20/2018] [Accepted: 01/08/2019] [Indexed: 11/17/2022]
Abstract
The aim of this study was to quantify three-dimensional condylar displacements as a result of two-jaw surgery for open bite correction in patients with skeletal class II and class III malocclusion. Pre-surgical (T1) and post-surgical (T2) cone beam computed tomography scans were taken for 16 patients with skeletal class II (mean age 22.3±9.47years) and 14 patients with skeletal class III (mean age 25.6±6.27years). T2 scans were registered to T1 scans at the cranial base. Translational and rotational condylar changes were calculated by x,y,z coordinates of corresponding landmarks. The directions and amounts of condylar displacement were assessed by intra- and inter-class Mann-Whitney U-test or t-test. Class II patients presented significantly greater amounts of lateral (P=0.002) and inferior (P=0.038) translation than class III patients. The magnitudes of condylar translational displacements were small for both groups. Skeletal class III patients had predominantly medial (P=0.024) and superior (P=0.047) condylar translation. Skeletal class II patients presented greater condylar counterclockwise pitch (P=0.007) than class III patients. Two-jaw surgery for the correction of open bite led to different directions and amounts of condylar rotational displacement in patients with skeletal class II compared to class III malocclusion, with greater rotational than translational displacements.
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Affiliation(s)
- J T Zupnik
- Department of Orthodontics and Pediatric Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - M Ioshida
- Department of Orthodontics and Pediatric Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - M Yatabe
- Department of Orthodontics and Pediatric Dentistry, University of Michigan, Ann Arbor, MI, USA.
| | - A C O Ruellas
- Department of Orthodontics and Pediatric Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - L R Gomes
- Department of Orthodontics and Pediatric Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - S Aronovich
- Department of Oral and Maxillofacial Surgery, University of Michigan, Ann Arbor, MI, USA
| | - E Benavides
- Department of Periodontics and Oral Medicine, University of Michigan, Ann Arbor, MI, USA
| | - S P Edwards
- Department of Oral and Maxillofacial Surgery, University of Michigan, Ann Arbor, MI, USA
| | | | - L H S Cevidanes
- Department of Orthodontics and Pediatric Dentistry, University of Michigan, Ann Arbor, MI, USA
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Dayan W, Aliaga-Del Castillo A, Janson G. Open-bite treatment with aligners and selective posterior intrusion. J Clin Orthod 2019; 53:53-54. [PMID: 30685758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Affiliation(s)
- Willy Dayan
- Private Practice of Orthodontics, Toronto, Ontario, Canada.
| | | | - Guilherme Janson
- Department of Orthodontics, Bauru Dental School, University of São Paulo, Brazil
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Ojima K, Dan C, Watanabe H, Kumagai Y, Nanda R. The Biomechanics of Aligner Orthodontics in Open-Bite Cases. J Clin Orthod 2019; 53:699-712. [PMID: 32059222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Affiliation(s)
- Kenji Ojima
- Private practice of orthodontics, Tokyo, Japan.
| | - Chisato Dan
- Private practice of orthodontics, Tokyo, Japan
| | | | | | - Ravindra Nanda
- Division of Orthodontics, Department of Craniofacial Sciences, University of Connecticut School of Dental Medicine, Farmington, CT; Progress in Orthodontics
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Kalia A. Nonsurgical Correction of Class III Malocclusion and Anterior Open Bite with Mini-Implant anchorage. J Clin Orthod 2018; 52:629-638. [PMID: 30462618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The combination of mandibular prognathism with anterior open bite poses a distinct challenge, often requiring both orthodontic treatment and orthognathic surgery. In adults, effective treatment has traditionally involved two-jaw surgery and superior repositioning of the maxilla with a Le Fort I osteotomy to close the anterior open bite, which reduces the anterior facial height by rotating the mandible upward and forward. This is often combined with a bilateral sagittal split osteotomy of the mandible to correct the mandibular protrusion.
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Affiliation(s)
- Ajit Kalia
- Department of Orthodontics, M.A. Rangoonwala Dental College, Pune, India.
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Garnett BS, Mahood K, Nguyen M, Al-Khateeb A, Liu S, Boyd R, Oh H. Cephalometric comparison of adult anterior open bite treatment using clear aligners and fixed appliances. Angle Orthod 2018; 89:3-9. [PMID: 30280928 DOI: 10.2319/010418-4.1] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES To compare fixed appliances and clear aligner therapy in correcting anterior open bite and in controlling the vertical dimension in adult patients with hyperdivergent skeletal patterns. MATERIALS AND METHODS In this retrospective study, two treatment groups of adult (≥18 years old) hyperdivergent patients (mandibular plane angles of ≥38°) with anterior open bites were included: 17 fixed appliance patients and 36 clear aligner patients. Thirteen cephalometric measurements representing the vertical dimension were reported for each group. A two-sample t-test was used to assess differences in changes in mandibular plane angle and overbite between the two treatment groups. RESULTS There were no statistical differences found in the magnitude of overbite correction and the changes in any of the cephalometric measurements for vertical control. The clear aligner group showed a slightly greater amount of lower incisor extrusion ( P = .009). The main mechanism of open bite correction was similar between the two treatment groups and was accomplished through retroclination of the upper and lower incisors while maintaining the vertical position of the upper and lower molars. CONCLUSIONS Cephalometric comparison of anterior open bite correction and changes in the mandibular plane angle associated with use of clear aligners and fixed appliances did not demonstrate statistically significant differences in adult hyperdivergent patients.
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28
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Nguyen T, Baek ES, Hwang S, Kim KH, Chung CJ. Nonsurgical and nonprosthetic camouflage treatment of skeletal Class II open bite with bilaterally missing lower first molars. Angle Orthod 2018; 89:505-517. [PMID: 30124320 DOI: 10.2319/030718-189.1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
This report illustrates the successful nonsurgical and nonprosthetic camouflage treatment of a skeletal Class II open bite malocclusion combined with missing mandibular first molars bilaterally. In the mandible, the second and third molars were uprighted and protracted, substituting for the missing first molars. In the maxilla, anterior bodily retraction and full-arch intrusion were achieved following premolar and second molar extraction, which also induced autorotation of the mandible. The treatment outcome and prognosis were confirmed with three-dimensional superimposition techniques, along with long-term stability.
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29
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Nakamura M, Kawanabe N, Adachi R, Yamashiro T, Kamioka H. Nonsurgical orthodontic treatment of a hypodivergent adult patient with bilateral posterior scissors bite and excessive overjet. Angle Orthod 2018; 89:333-349. [PMID: 30080111 DOI: 10.2319/111617-791.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
This report illustrates successful nonsurgical orthodontic treatment of a hypodivergent adult patient with bilateral posterior scissors bite (Brodie bite) and excessive overjet. A 26-year-old woman primarily reported maxillary incisor protrusion. She was diagnosed with Class ll division 1 malocclusion with skeletal Class I, short face, low mandibular plane angle and bilateral posterior scissors bite. A lingual arch with anterior bite block and posterior miniscrews with preadjusted edgewise appliances were used to improve the bilateral scissors bite. After achieving molar occlusion, the maxillary first premolars were extracted, and six miniscrews were used to improve the anterior-posterior and vertical discrepancies. After active treatment for 56 months, the convex facial profile with excessively protruded lips was improved and good interdigitation with ideal incisor relationship was achieved. Additionally, the irregular movements of the incisal path and the bilateral condyles during lateral excursion were improved. At 13 months of retention, a satisfactory facial profile, occlusion, and jaw movements were maintained. The treatment results suggest that miniscrews and fixed bite blocks were effective and efficient to facilitate correction of the bilateral scissors bite, excessive overjet, and vertical relationship correction in this nonsurgical orthodontic treatment.
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30
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KYDD WL, AKAMINE JS, MENDEL RA, KRAUS BS. Tongue and Lip Forces Exerted during Deglutition in Subjects with and without an Anterior Open Bite. J Dent Res 2016; 42:858-66. [PMID: 13927772 DOI: 10.1177/00220345630420031801] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Insabralde NM, de Almeida RR, Henriques JFC, Fernandes TMF, Flores-Mir C, de Almeida MR. Dentoskeletal effects produced by removable palatal crib, bonded spurs, and chincup therapy in growing children with anterior open bite. Angle Orthod 2016; 86:969-975. [PMID: 27159552 PMCID: PMC8597351 DOI: 10.2319/011916-49.1] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2016] [Accepted: 03/01/2016] [Indexed: 04/05/2024] Open
Abstract
OBJECTIVE To evaluate the dentoskeletal effects of different anterior open bite treatment modalities in children. MATERIALS AND METHODS This cephalometric study assessed changes resulting from different treatment approaches on 77 growing children with anterior open bite. A control group (n = 30) was used for comparison. Lateral cephalograms were available before treatment and after 12 months. The sample was divided into four groups: removable palatal crib associated with a chincup (G1), bonded spurs associated with a chincup (G2), chincup (G3), and nontreated control (G4). Statistical comparisons among the four groups were performed on T1 and the treatment changes using analysis of variance with Tukey's post hoc tests. RESULTS No statistically significant changes in skeletal variables were found among the groups, except for lower anterior face height (LAFH) increase in G1. Overall, effects in all of the treated groups were exclusively dentoalveolar. A larger overbite (OB) increase was observed in G1 and G2 when compared with G3 and G4. The maxillary incisors in G1 showed increased palatal tipping, retrusion, and more vertical dentoalveolar development as well as increased lingual tipping among mandibular incisors. There was less vertical development of maxillary and mandibular molars in G3. CONCLUSIONS A removable palatal crib provided an improvement in OB (97.5%), followed by the bonded spurs (84.5%). Conversely, the chincup-only group did not have positive OB effects.
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Germa A, Clément C, Weissenbach M, Heude B, Forhan A, Martin-Marchand L, Bonet M, Vital S, Kaminski M, Nabet C. Early risk factors for posterior crossbite and anterior open bite in the primary dentition. Angle Orthod 2016; 86:832-838. [PMID: 26998889 PMCID: PMC8600852 DOI: 10.2319/102715-723.1] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Accepted: 01/01/2016] [Indexed: 10/13/2023] Open
Abstract
OBJECTIVE To investigate risk factors specific to posterior crossbite and anterior open bite at the age of 3 years. MATERIALS AND METHODS The study included 422 children of the French EDEN mother-child cohort. The main outcomes were the presence of posterior crossbite and anterior open bite assessed by dentists at 3 years. Social characteristics (collected during pregnancy), neonatal characteristics (collected at birth), duration of breast-feeding (collected prospectively), sucking habits at 3 years, and open lips (as a proxy for mouth breathing) were studied and two logistic regressions conducted. RESULTS Preterm birth appears to be a risk factor specific for posterior crossbite (OR: 3.13; 95% CI: 1.13-8.68), whereas small for gestational age seems to be associated with a lower risk of posterior crossbite (OR: 0.32; 95% CI: 0.12-0.87). Ongoing pacifier or thumb sucking at 3 years is a risk factor for both posterior crossbite and anterior open bite. CONCLUSIONS Children born preterm seem to be more at risk for posterior crossbite than those born at term. Different mechanisms may be involved in posterior crossbite and anterior open bite.
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Affiliation(s)
- Alice Germa
- Associate Professor, Paris Descartes University, Faculty of Odontology, Montrouge, France; INSERM, UMR 1153, Obstetrical, Perinatal, and Pediatric Epidemiology (EPOPE) Team, Epidemiology and Biostatistics, Sorbonne Paris Cité Research Center, Paris, France; Hôpital Charles Foix, Ivry-sur-Seine, France
| | - Céline Clément
- Associate Professor, Department of Dental Public Health, Faculty of Dental Surgery, Université de Lorraine, Nancy, France
| | - Michel Weissenbach
- Professor Emeritus, Department of Dental Public Health, Faculty of Dental Surgery, Université de Lorraine, Nancy, France
| | - Barbara Heude
- Senior Researcher, INSERM, UMR 1153, Early Origin of the Child’s Health and Development Team (ORCHAD) team, Epidemiology and Biostatistics Sorbonne Paris Cité Research Center, Villejuif, France
| | - Anne Forhan
- Research Engineer, INSERM, UMR 1153, Early Origin of the Child’s Health and Development Team (ORCHAD) team, Epidemiology and Biostatistics Sorbonne Paris Cité Research Center, Villejuif, France
| | - Laetitia Martin-Marchand
- Research Engineer, INSERM, UMR 1153, Obstetrical, Perinatal, and Pediatric Epidemiology (EPOPE) Team, Epidemiology and Biostatistics Sorbonne Paris Cité Research Center, Paris, France
| | - Mercedes Bonet
- Researcher, INSERM, UMR 1153, Obstetrical, Perinatal, and Pediatric Epidemiology (EPOPE) Team, Epidemiology and Biostatistics Sorbonne Paris Cité Research Center, Paris, France
| | - Sibylle Vital
- Professor, Pediatric Dentistry, Faculty of Odontology, Paris Descartes University, Montrouge, France
| | - Monique Kaminski
- Senior Researcher, INSERM, UMR 1153, Obstetrical, Perinatal, and Pediatric Epidemiology (EPOPE) Team, Epidemiology and Biostatistics Sorbonne Paris Cité Research Center, Paris, France
| | - Cathy Nabet
- Professor, Department of Dentistry, Toulouse University Hospital, Toulouse, France
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Alsafadi AS, Alabdullah MM, Saltaji H, Abdo A, Youssef M. Effect of molar intrusion with temporary anchorage devices in patients with anterior open bite: a systematic review. Prog Orthod 2016; 17:9. [PMID: 26980200 PMCID: PMC4803715 DOI: 10.1186/s40510-016-0122-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Accepted: 02/23/2016] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE The objective of the study is to assess the effect of molar intrusion with temporary anchorage devices on the vertical facial morphology and mandibular rotation during open bite treatment in the permanent dentition. METHODS We performed a systematic review of the published data in seven electronic databases up to September 2015. We considered studies for inclusion if they were examining the effects of posterior teeth intrusion on the vertical facial morphology with open bite malocclusion in the permanent dentition. Study selection, risk of bias assessment, and data-extraction were performed in duplicate. Meta-analysis was not possible due to dissimilarity and heterogeneity among the included studies. RESULTS Out of the 42 articles that met the initial eligibility criteria, 12 studies were finally selected. Low level of scientific evidence was identified after risk of bias assessment of the included studies with no relevant randomized controlled trial performed. Out of the 12 selected studies, five studies used miniplates and seven studies used miniscrews. Mandibular counterclockwise rotation was found to be between 2.3° and 3.9° in six studies (as sassed by mandibular plane angle, between MeGo or GoGn and SN or FH plane) while it was less than 2° in the remaining studies. CONCLUSIONS Current weak evidence suggests that molar intrusion with temporary anchorage devices may cause mandibular counterclockwise autorotation. Future well-conducted and clearly reported multicenter randomized controlled trials that include a non-treatment control group are needed to make robust recommendations regarding the amount of mandibular rotation during open bite treatments.
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Affiliation(s)
- Ahmad Saleem Alsafadi
- Department of Orthodontics, Faculty of Dentistry, Damascus University, Damascus, Syria.
| | - Mohannad M Alabdullah
- Department of Orthodontics, Faculty of Dentistry, Damascus University, Damascus, Syria
| | - Humam Saltaji
- Orthodontic Graduate Clinic, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada
| | - Anas Abdo
- Faculty of Dentistry, Damascus University, Damascus, Syria
| | - Mohamed Youssef
- Department of Orthodontics, Faculty of Dentistry, Damascus University, Damascus, Syria
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Zheng W, Lin J. [Spinal muscular atrophy with open bite: A case report]. Hua Xi Kou Qiang Yi Xue Za Zhi 2013; 31:315-316. [PMID: 23841309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Spinal muscular atrophy is one rare type of autosomal recessive disorder. The disease is characterized by the progressive degeneration of spinal cord anterior horn motor neurons and brainstem motor nuclei, which leads to muscle atrophy and paralysis. One case of spinal muscular atrophy with open bite was reported here.
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Affiliation(s)
- Weiying Zheng
- Dept. of Stomatology, the Second Hospital of Jiaxing, Jiaxing 314000, China
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Buczynski AK, Castro GF, Leão AT, Souza IP. Impact of oral health on the quality of life of 3-6-years old HIV-infected children. Quality of life in HIV+ children. Eur J Paediatr Dent 2011; 12:81-86. [PMID: 21668276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
AIM The objective was to assess the impact of oral health on the quality of life of HIV-infected patients aged 3-6 years based on their caregivers' perceptions. METHODS A questionnaire for measuring the perception and the instrument Early Childhood Oral Health Impact Scale (ECOHIS) were applied to 31 caregivers whose children were being treated in a public hospital. Results The mean age of the children was 4.52 years (SD 1.22). The total ECOHIS score ranged from 0 to 26, with a mean value of 4.13 (SD 6.66). Seventeen children (54.8%) were found to have at least one impact: toothache (64.7%), herpetic gingivostomatitis (23.5%) or both (11.8%). Statistically significant difference was found between the ECOHIS score and presence of restored teeth, prior dental treatment, AIDS, and viral load. With respect to the caregivers' perception, it resulted to be adequate, as those caregivers whose children had a greater number of decayed teeth and higher biofilm index also considered the oral health to be bad (P<0.001). However, the children's general health was found to be good despite the worse immunological classification (P<0.017).Conclusion The quality of life of the HIV- infected children has been negatively affected by the oral health.
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Affiliation(s)
- A K Buczynski
- Department of Paediatric Dentistry, Ilha do Fundão, Rio de Janeiro, Brazil
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Wang ZQ, Zhou HX, Chen GL, Ai YL, Huang CH, Lu Y, Tang KH, Du LJ, Zeng HB, Huang XQ. [Clinical application of micro-implant anchorage for treatment of scissors bite on one-side posterior teeth]. Hua Xi Kou Qiang Yi Xue Za Zhi 2008; 26:40-43. [PMID: 18357881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
OBJECTIVE To evaluate the efficiency of micro-implant anchorage (MIA) for posterior teeth intruded and the result of the treatment of scissors bite on one-side posterior teeth. METHODS The study included 3 females and 1 male. All the overextruding upper posterior teeth were intruded by the MIA. The micro-implant screws were inserted into the buccal and lingual alveolar hone of the maxillary posterior teeth or the buccal alveolar hone of mandibular posterior teeth. About 0.833 N force was used to intrude the overgrowthing upper posterior teeth, and about 0.559 N force was used to draw buecally the low posterior teeth tilting lingually. RESULTS The overextruding upper posterior teeth were intruded 2.0 mm on average, the low posterior teeth tilting lingually were upreared buccally. All the MIA screws kept stable during the treatment, but there was a slight inflammation around the implant screws. CONCLUSION MIA could be used as an efficient method to correct scissors bite on one-side posterior teeth with intruding overgrowth upper posterior teeth, or uprearing buccally the tilting low posterior teeth.
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Affiliation(s)
- Zeng-quan Wang
- Dept. of Orthodontics, The Affiliated Stomatological Hospital, Foshan College of Science and Technology, Foshan 528000, China
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da Silva CM, Ramos MM, Carrara CFDC, Dalben GDS. Oral characteristics of newborns. J Dent Child (Chic) 2008; 75:4-6. [PMID: 18505640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Newborn infants present some oral characteristics that are inherent to their stage of development and adequate to their physiological needs. There may also be physiological variations, however, which frequently raise doubts among parents. Many dental professionals are not aware of these aspects of the oral cavity of infants. The purpose of this paper was to present the normal aspects and common variations observed in the oral cavity of newborns to allow proper dental care and counseling to parents.
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Li JN, Kanno ZS, Soma K. [Study of occlusal force on female open bite patients with temporomandibular disorders]. Hua Xi Kou Qiang Yi Xue Za Zhi 2007; 25:536-539. [PMID: 18306619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
OBJECTIVE To investigate the effect of occlusal force on the etiology of open bite patients who suffer from temporomandibular disorders (TMD). METHODS One hundred and two women patients with open bite were divided into TMD (+) group and TMD (-) group according to patients with or without TMD. Occlusal force, occlusal contact areas, occlusal average pressure and occlusal center were evaluated with pressure sensitive sheets. The results were analyzed by SPSS 11.0 statistic software. RESULTS Occlusal force and occlusal contact areas in TMD (+) group were significantly lower than that in TMD (-) group. Occlusal average pressure and occlusal center had no significance between two groups. CONCLUSION The results indicate that the decrease of occlusal force and occlusal contact areas may have some relationships with TMD in open bite patients.
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Affiliation(s)
- Jiang-Ning Li
- Dept of Orthodontics, Faculty of Stomatology, Capital University of Medical Sciences, Beijing 100050, China
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Phan X, Ling PH. Clinical limitations of Invisalign. J Can Dent Assoc 2007; 73:263-6. [PMID: 17439714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Adult patients seeking orthodontic treatment are increasingly motivated by esthetic considerations. The majority of these patients reject wearing labial fixed appliances and are looking instead to more esthetic treatment options, including lingual orthodontics and Invisalign appliances. Since Align Technology introduced the Invisalign appliance in 1999 in an extensive public campaign, the appliance has gained tremendous attention from adult patients and dental professionals. The transparency of the Invisalign appliance enhances its esthetic appeal for those adult patients who are averse to wearing conventional labial fixed orthodontic appliances. Although guidelines about the types of malocclusions that this technique can treat exist, few clinical studies have assessed the effectiveness of the appliance. A few recent studies have outlined some of the limitations associated with this technique that clinicians should recognize early before choosing treatment options.
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Affiliation(s)
- Xiem Phan
- University of Western Ontario, London, Ontario
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Koczorowski M, Woźniak W, Koczorowski R. Impairment of the oral stereognosis in the partial anterior open bite. Folia Morphol (Warsz) 2006; 65:221-4. [PMID: 16988919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The study was performed in 20 children with partial anterior open bite and in 20 children of a control group. Stereognosis was evaluated on the basis of correct recognition responses to silicone pieces of the different shapes. Pieces were put on the dorsal surface of the tongue close to its apex. It was evident that the stereognostic ability was impaired in children with anterior open bite. This ability also decreased after infiltration anaesthesia of the tongue. The study indicated that the tongue plays an important role in oral stereognosis.
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Affiliation(s)
- M Koczorowski
- Orthodontics Clinic, University of Medical Sciences, Poznań, Poland
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Ba Diop K, Diagne F, N'Gom PI, Deme TB. [Discriminating factors of mandibular divergence]. Dakar Med 2002; 47:206-9. [PMID: 15776677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The aim of this work is to identify the discriminating factors of mandibular divergence. 90 patient records taken from the 98--99. 99--2000 files in the orthopedic dentistry service of the Department of Odontology at Dakar University were examined. The patients selected were all of Black African descent and aged from 11 to 13. This work consists in the cephalometric examination of X-ray profiles radiographis in order to compare various elements between normodivergent and open-bite subjects. The statistical analysis of data along with various tests carried out led to the following conclusions: - Measuring FMA. GOI-Me/Oli, GOI-Me/Pocc, Ans-Pns/GOI-Me and chin angle can be used to discriminate between open-bite and normodivergent patients. - SN/GOI-Me has a positive correlation with GOI-Me/Oli, GOI-Me/ Pocc, Ans-Pns/Pocc, Ans-Pns/GOI-Me and FMA. - The chin angle has a negative correlation with the previous forms of measurements. - The correlation between Ans-Pns/Pocc and the other measures is weak. - The average difference between the measures of both groups is important, which means that these variables discriminate between normodivergent et open-bite patients. BIased on the most discriminating variables, we produced the following function of classification: F= - 1,542 -0,095(Angle) + 0.098(Ans-Pns/GOI-Me) + 0,145(FMA) We have also established an equation of probability for a patient to be normodivergent or open-bite, which is as follows: Pr (Normal) -----------=e(-0.273 FMA -0.267 ANS-NS/MEGOI +0.272 ANGLE) Pr (hyper)
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STOECKLI P. [TREATMENT OF OPEN BITE]. SSO Schweiz Monatsschr Zahnheilkd 1965; 75:866-7. [PMID: 14344598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/26/2023]
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SNIDECOR JC, KAIRES AK. A speech corrective prosthesis for anterior “ open bite” malocclusion and its effect on two postdental fricative sounds. J Prosthet Dent 1965; 15:779-84. [PMID: 14313327 DOI: 10.1016/0022-3913(65)90052-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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STRICKLING L. [PSEUDO- OPEN BITE IN CHRONIC POLYARTHRITIS]. DDZ 1965; 19:111-4. [PMID: 14298914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/26/2023]
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CHRISTENSEN RW. Anterior open-bite or retrognathia corrected by a vertical sliding osteotomy of the ramus, with or without bone graft: An improved technique. ACTA ACUST UNITED AC 1960; 13:1409-22. [PMID: 13693368 DOI: 10.1016/0030-4220(60)90226-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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SCHUCHARDT K. [Treatment of oral deformities; progenia, prognathism & open bite]. Langenbecks Arch Klin Chir Ver Dtsch Z Chir 1957; 287:733-6. [PMID: 13526464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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47
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ROZHKOVA LM. [Characteristics of the treatment of anomalies of open bite in adults]. Stomatologiia (Mosk) 1955; 1:53-5. [PMID: 14386203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/26/2023]
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SKALOUD F, BERENYI B. [New operative method for treatment of the open bite]. Fogorv Sz 1953; 46:371-4. [PMID: 13173679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
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