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Tercanlı H, Bolat Gümüş E. Evaluation of mandibular trabecular bone structure in growing children with Class I, II, and III malocclusions using fractal analysis: A retrospective study. Int Orthod 2024; 22:100875. [PMID: 38692119 DOI: 10.1016/j.ortho.2024.100875] [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: 12/19/2023] [Revised: 04/04/2024] [Accepted: 04/06/2024] [Indexed: 05/03/2024]
Abstract
OBJECTIVE The present study aimed to evaluate the mandibular bone structure of patients with different malocclusions by using fractal dimension (FD) analysis on dental panoramic radiographic images. MATERIAL AND METHODS Pre-treatment panoramic radiographic images of 103 patients were included in the study and divided into 3 groups as Class I (group 1: 0 RESULTS FD values were lower in Class I sagittal skeletal pattern than Class II and III groups in anterior ROI FD, premolar ROI FD, angulus ROI FD, and mean FD values. There were differences between Class I and Class III skeletal patterns (P=0.023 for anterior ROI FD, P=0.016 for premolar ROI FD, P=0.034 for angulus ROI FD, and P=0.014 for mean FD). Class I and II malocclusions differed in anterior ROI FD (P=0.029) and also Classes II and III showed differences in angulus ROI FD (P=0.029). CONCLUSION Sagittal skeletal patterns may result in differences in the structure of the mandibular trabecular bone.
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Affiliation(s)
- Hümeyra Tercanlı
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Akdeniz University, 07058 Antalya, Turkey
| | - Esra Bolat Gümüş
- Department of Orthodontics, Faculty of Dentistry, Akdeniz University, 07058 Antalya, Turkey.
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Elkalza AR, Yacout YM. Effect of SEC III protocol on upper airway dimensions in growing class III patients: a retrospective study. BMC Oral Health 2023; 23:841. [PMID: 37940933 PMCID: PMC10631026 DOI: 10.1186/s12903-023-03613-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 11/02/2023] [Indexed: 11/10/2023] Open
Abstract
BACKGROUND The primary objective of the study was to evaluate the effects of SEC III (Splints, Class III Elastics, and Chin cup) protocol on the upper airway dimensions using lateral cephalometric radiographs. The secondary objectives were to evaluate the skeletal and dental effects of the SEC III protocol using lateral cephalometric radiographs. METHODS The pre- and post-treatment lateral cephalometric radiographs of 24 patients treated using the SEC III protocol were used to address the aim of the study. Children in the pre-pubertal (CS-1 or CS-2) or circumpubertal (CS-3 or CS-4) skeletal maturation stage and having class III dentoskeletal malocclusion were included in the study. Patients with a history of previous orthodontic treatment, maxillofacial surgery or trauma, tonsillectomy, adenoidectomy, or craniofacial malformations were excluded. The pre-treatment and post-treatment lateral cephalometric radiographs were traced, then airway measurements, skeletal measurements, and dental measurements were performed. The results were analysed using paired samples t-test or Wilcoxon signed rank test according to the data normality. RESULTS Data of 6 males and 18 females were analysed (Mean age = 11.21 ± 1.02 years). Duration of active treatment was 5.75 ± 1.03 months. Treatment using SEC III protocol resulted in a significant increase in ANB angle (2.92 ± 1.50 degrees, p < 0.001) and Wits appraisal (3.31 ± 1.99 mm) (p < 0.001). The increase in the mandibular plane angle (0.75 ± 1.42 degrees, p = 0.02) and the maxillary length (2.29 ± 2.69 mm, p < 0.001) was statistically significant. Contrarily, the mandibular length did not change significantly (p = 0.10). The maxillary incisors were significantly proclined (4.38 ± 4.28 degrees; p < 0.001), while the mandibular incisors were significantly retroclined (-5.79 ± 6.21 degrees; p < 0.001) following treatment. The change in the nasopharyngeal airway and the retropalatal airway was not statistically significant. The middle and inferior pharyngeal space (retroglossal airway) significantly decreased by 1.33 ± 1.97 mm (p = 0.003) and 1.96 ± 2.48 mm (p = 0.001), respectively. CONCLUSIONS Early class III correction using SEC III protocol reduced the retroglossal airway dimensions but did not affect the nasopharyngeal and retropalatal airway dimensions. Correction of the class III dentoskeletal relationship was obtained through both skeletal and dental changes.
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Affiliation(s)
- Ahmed R Elkalza
- Department of Orthodontics, Faculty of Dentistry, Alexandria University, Champollion St, P. O. Box: 21521, Alexandria, Alexandria, Egypt
| | - Yomna M Yacout
- Department of Orthodontics, Faculty of Dentistry, Alexandria University, Champollion St, P. O. Box: 21521, Alexandria, Alexandria, Egypt.
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Kori C, Cheriyachan R, MS R. Assessment of Dentofacial Characteristics in Individuals with Different Midfacial Skeletal Morphologies. JOURNAL OF HEALTH AND ALLIED SCIENCES NU 2022. [DOI: 10.1055/s-0042-1745731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Abstract
Introduction An orthodontist's primary objective is to diagnose and describe the characteristics of any particular malocclusion. It has been reported that when the anteroposterior dimension of the maxilla is either reduced or increased, the measured dentoalveolar and skeletal parameters gets affected in other dimensions also.
Aim This study aims to assess and compare the dentofacial characteristics in individuals with different skeletal morphology (normal, retrognathic, and prognathic maxilla).
Materials and Methods A total of 194 individuals in the age group of 18 to 32 years were grouped as group I (34 males, 33 females) with normal maxilla, group II (30 males, 32 females) with retrognathic maxilla, and group III (34 males, 31 females) with prognathic maxilla. The measurements of N-A and anterior nasal spine to posterior nasal spine were the basis for selecting the individuals. The dentoalveolar characteristics were assessed using 17 lateral cephalometric and 08 posteroanterior (P-A) cephalometric parameters.
Results The data of the study when analyzed statistically using sample “t” test (p < 0.05), revealed significant differences between the genders within the groups. All 08 characteristics measured in the P-A cephalogram showed had significant differences. Pairwise comparison between the groups was performed using the Tukey post hoc test (p < 0.05) and significant differences in various dentoalveolar characteristics were observed between the groups.
Conclusion Dentoalveolar and facial parameters showed a significant degree of sexual dimorphism associated with maxillary morphology in all three groups of individuals. The majority of the parameters showed male dominance, and the differences were statistically significant. Statistically significant differences were observed in dentofacial characteristics in individuals with different skeletal morphologies
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Affiliation(s)
- Chaitra Kori
- Department of Orthodontics and Dentofacial Orthopedics, A B Shetty Memorial Institute of Dental Sciences, Nitte Deemed to be University, Mangalore, Karnataka, India
| | - Roy Cheriyachan
- Department of Orthodontics and Dentofacial Orthopedics, A B Shetty Memorial Institute of Dental Sciences, Nitte Deemed to be University, Mangalore, Karnataka, India
| | - Ravi MS
- Department of Orthodontics and Dentofacial Orthopedics, A B Shetty Memorial Institute of Dental Sciences, Nitte Deemed to be University, Mangalore, Karnataka, India
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Genes and Pathways Associated with Skeletal Sagittal Malocclusions: A Systematic Review. Int J Mol Sci 2021; 22:ijms222313037. [PMID: 34884839 PMCID: PMC8657482 DOI: 10.3390/ijms222313037] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 11/06/2021] [Accepted: 11/30/2021] [Indexed: 12/15/2022] Open
Abstract
Skeletal class II and III malocclusions are craniofacial disorders that negatively impact people’s quality of life worldwide. Unfortunately, the growth patterns of skeletal malocclusions and their clinical correction prognoses are difficult to predict largely due to lack of knowledge of their precise etiology. Inspired by the strong inheritance pattern of a specific type of skeletal malocclusion, previous genome-wide association studies (GWAS) were reanalyzed, resulting in the identification of 19 skeletal class II malocclusion-associated and 53 skeletal class III malocclusion-associated genes. Functional enrichment of these genes created a signal pathway atlas in which most of the genes were associated with bone and cartilage growth and development, as expected, while some were characterized by functions related to skeletal muscle maturation and construction. Interestingly, several genes and enriched pathways are involved in both skeletal class II and III malocclusions, indicating the key regulatory effects of these genes and pathways in craniofacial development. There is no doubt that further investigation is necessary to validate these recognized genes’ and pathways’ specific function(s) related to maxillary and mandibular development. In summary, this systematic review provides initial insight on developing novel gene-based treatment strategies for skeletal malocclusions and paves the path for precision medicine where dental care providers can make an accurate prediction of the craniofacial growth of an individual patient based on his/her genetic profile.
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Tanaka A, Shoji N, Kojima I, Kumasaka A, Sakamoto M, Sasaki K, Fukunaga T, Mizoguchi I, Tominaga T, Iikubo M. A comparative study on cephalometric differences in maxillofacial morphology between skeletal Class III cases with and without acromegaly: a pilot study. Oral Radiol 2021; 38:224-233. [PMID: 34245408 DOI: 10.1007/s11282-021-00548-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 06/19/2021] [Indexed: 12/01/2022]
Abstract
OBJECTIVES The most typical maxillofacial feature of patients with acromegaly is mandibular protrusion. This study aimed to determine differences in maxillofacial morphology between skeletal Class III patients with and without acromegaly using cephalometric analysis. METHODS Cephalograms of 37 patients with acromegaly (Acro), 37 age-matched non-acromegalic patients with skeletal Class III malocclusion (C-III), and 37 age-matched Class I malocclusion patients (C-I; control) were retrospectively collected. The skeletal and dental morphology of each group was analyzed using cephalometric analysis, which included linear and angular measurements and facial profilograms. In addition, we analyzed diagnostic performance and cutoff values for discriminating acromegaly from skeletal Class III malocclusion using receiver operating characteristic (ROC) curve analysis. RESULTS The mandibular ramus height was larger in the Acro group than in the other groups. The increase in L1/MP in the Acro group, which represented labial inclination of the mandibular central incisors, was the most characteristic feature in this study. ROC curve analysis indicated that a cutoff value of 88.4° for L1/MP had the highest diagnostic performance in discriminating acromegaly from non-acromegalic Class III malocclusion. CONCLUSIONS Acromegaly was characterized by a greater degree of bimaxillary prognathism than was non-acromegalic Class III malocclusion. Focusing on labial inclination of the mandibular central incisors would be the most useful way to differentiate acromegaly from non-acromegalic Class III malocclusion.
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Affiliation(s)
- Atsushi Tanaka
- Division of Dental Informatics and Radiology, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Noriaki Shoji
- Division of Dental Informatics and Radiology, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan.
| | - Ikuho Kojima
- Division of Dental Informatics and Radiology, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Akira Kumasaka
- Division of Dental Informatics and Radiology, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Maya Sakamoto
- Division of Dental Informatics and Radiology, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Kiyo Sasaki
- Division of Orthodontics and Dentofacial Orthopaedics, Tohoku University Graduate School of Dentistry, Aoba-ku, Sendai, Japan
| | - Tomohiro Fukunaga
- Division of Orthodontics and Dentofacial Orthopaedics, Tohoku University Graduate School of Dentistry, Aoba-ku, Sendai, Japan
| | - Itaru Mizoguchi
- Division of Orthodontics and Dentofacial Orthopaedics, Tohoku University Graduate School of Dentistry, Aoba-ku, Sendai, Japan
| | - Teiji Tominaga
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, Aoba-ku, Sendai, Japan
| | - Masahiro Iikubo
- Division of Dental Informatics and Radiology, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
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Combined Orthodontic and Surgical Management for Treatment of Severe Class III Malocclusion with Anterior and Posterior Crossbites. Case Rep Dent 2021; 2021:5579077. [PMID: 34258077 PMCID: PMC8257345 DOI: 10.1155/2021/5579077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 06/08/2021] [Indexed: 11/18/2022] Open
Abstract
Severe class III malocclusion can be a great challenge, especially in adult patients. This case report describes an adult patient with severe skeletal class III malocclusion and with an obvious maxillary deficiency and mandibular excess causing both anterior and posterior crossbites in addition to a shift in the upper and lower midlines to the left concerning the facial midline. This was complicated by compensatory mechanisms such as the proclination of upper incisors and retroclination of lower incisors. Decompensation of the upper and lower arches was performed combined with upper arch expansion to relieve crowding in the upper arch and correct the posterior crossbite. This was followed by double jaw surgeries, including Le Fort I osteotomy in the maxilla and bilateral sagittal split osteotomy (BSSO) in the mandible. Orthodontic finishing procedures were then used to correct any other dental discrepancies. Remarkable esthetic and functional results were achieved with high patient satisfaction.
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Kale B, Buyukcavus MH. Comparison of three-dimensional soft-tissue evaluations between skeletal and pseudo-class III malocclusions. Sci Rep 2020; 10:14717. [PMID: 32895440 PMCID: PMC7477542 DOI: 10.1038/s41598-020-71772-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 08/17/2020] [Indexed: 11/09/2022] Open
Abstract
The aim of our study was to compare soft tissue measurements with 3D imaging methods in individuals with untreated skeletal and pseudo-Class III malocclusions. The study sample consisted of 75 patients (38 males, 37 females, mean age 12.41 ± 2.35 years) with pseudo- and true skeletal Class III malocclusions and skeletal Class I malocclusions. Soft tissue evaluations of all patients were performed using 3D stereophotogrammetric facial images. In our study, 26 landmarks, 17 linear measurements, 13 angular measurements, and 5 volume measurements were made using the 3dMD Vultus software. The significance was determined to be p < 0.05 in ANOVA, Tukey tests. No significant differences were found among the groups in terms of demographic data (p > 0.05). The skeletal Class I control group had a significantly more extended upper lip and vermillion length as compared to the Class III groups. The soft tissue convexity angle and upper nasal angle were found to be wider in the Class III malocclusion group compared to those in the Class I control group. While the pseudo-Class III group had a significantly lower midface volume, chin volume was significantly higher in the skeletal class group. Upper lip volume was significantly higher in the Class I group. Using 3dMD for guiding clinicians in the differential soft and hard tissue diagnosis of pseudo-Class III malocclusions, differences were revealed in Class I patients in the middle part of the face. In the differential diagnosis of true Class III malocclusions, chin volume was found to be different from that of Class I patients.
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Affiliation(s)
- Burak Kale
- Department of Orthodontics, Faculty of Dentistry, Antalya Bilim University, Antalya, Turkey
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Plaza SP, Reimpell A, Silva J, Montoya D. Relationship between skeletal Class II and Class III malocclusions with vertical skeletal pattern. Dental Press J Orthod 2019; 24:63-72. [PMID: 31508708 PMCID: PMC6733235 DOI: 10.1590/2177-6709.24.4.063-072.oar] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 11/26/2018] [Indexed: 12/29/2022] Open
Abstract
OBJECTIVE The purpose of this study was to establish the association between sagittal and vertical skeletal patterns and assess which cephalometric variables contribute to the possibility of developing skeletal Class II or Class III malocclusion. METHODS Cross-sectional study. The sample included pre-treatment lateral cephalogram radiographs from 548 subjects (325 female, 223 male) aged 18 to 66 years. Sagittal skeletal pattern was established by three different classification parameters (ANB angle, Wits and App-Bpp) and vertical skeletal pattern by SN-Mandibular plane angle. Cephalometric variables were measured using Dolphin software (Imaging and Management Solutions, Chatsworth, Calif, USA) by a previously calibrated operator. The statistical analysis was carried out with Chi-square test, ANOVA/Kruskal-Wallis test, and an ordinal multinomial regression model. RESULTS Evidence of association (p< 0.05) between sagittal and vertical skeletal patterns was found with a greater proportion of hyperdivergent skeletal pattern in Class II malocclusion using three parameters to assess the vertical pattern, and there was more prevalent hypodivergence in Class III malocclusion, considering ANB and App-Bpp measurements. Subjects with hyperdivergent skeletal pattern (odds ratio [OR]=1.85-3.65), maxillary prognathism (OR=2.67-24.88) and mandibular retrognathism (OR=2.57-22.65) had a significantly (p< 0.05) greater chance of developing skeletal Class II malocclusion. Meanwhile, subjects with maxillary retrognathism (OR=2.76-100.59) and mandibular prognathism (OR=5.92-21.50) had a significantly (p< 0.05) greater chance of developing skeletal Class III malocclusion. CONCLUSIONS A relationship was found between Class II and Class III malocclusion with the vertical skeletal pattern. There is a tendency toward skeletal compensation with both vertical and sagittal malocclusions.
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Affiliation(s)
- Sonia Patricia Plaza
- Fundación Centro de Investigación y Estudios Odontológicos - UniCIEO, Departamento de Ortodoncia (Bogotá, Colombia)
| | - Andreina Reimpell
- Fundación Centro de Investigación y Estudios Odontológicos - UniCIEO, Departamento de Ortodoncia (Bogotá, Colombia)
| | - Jaime Silva
- Fundación Centro de Investigación y Estudios Odontológicos - UniCIEO, Departamento de Ortodoncia (Bogotá, Colombia)
| | - Diana Montoya
- Fundación Centro de Investigación y Estudios Odontológicos - UniCIEO, Departamento de Ortodoncia (Bogotá, Colombia)
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Fatima F, Fida M. The assessment of resting tongue posture in different sagittal skeletal patterns. Dental Press J Orthod 2019; 24:55-63. [PMID: 31390450 PMCID: PMC6677336 DOI: 10.1590/2177-6709.24.3.055-063.oar] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 06/27/2018] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION Resting tongue posture affects the surrounding structures and, theoretically, may result in altered arch form and jaw relationship. OBJECTIVE The objective of the present study was to investigate the association between resting tongue posture as observed in lateral cephalometric radiograph, sagittal jaw relationship and arch form. METHODS The study was conducted on pretreatment lateral cephalograms and dental casts of 90 subjects. Subjects were equally divided into three groups, based on sagittal jaw relationship (Class I, II and III). Tongue posture was determined in terms of tongue-to-palate distances at six different points (distances 1 to 6) using ViewPro-X software, according to the method described by Graber et al in 1997. The arch widths (intercanine and intermolar widths) were evaluated on pretreatment dental casts. RESULTS Tongue-to-palate distances were found to be comparable among different study groups. Significant differences were found in intercanine and intermolar widths at the cuspal and gingival levels among the study groups, except for intercanine width at cuspal level in maxilla and intermolar width at cuspal level in mandible. Moderate positive correlation was found between arch widths ratios at distances 3 and 4 in skeletal Class III group. Effect size was found to be moderate to large in different sagittal skeletal patterns and arch widths. CONCLUSION The results of the current study showed no significant differences in the resting tongue posture among the groups, and moderate to weak correlation between tongue posture and dental arch widths.
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Affiliation(s)
- Farheen Fatima
- The Aga Khan University Hospital, Department of Surgery, Section of Dentistry (Karachi, Pakistan)
| | - Mubassar Fida
- The Aga Khan University Hospital, Department of Surgery, Section of Dentistry (Karachi, Pakistan)
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Liu C, Zhu X, Zhang X. Three-dimensional finite element analysis of maxillary protraction with labiolingual arches and implants. Am J Orthod Dentofacial Orthop 2015; 148:466-78. [PMID: 26321345 DOI: 10.1016/j.ajodo.2015.04.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 04/01/2015] [Accepted: 04/01/2015] [Indexed: 11/16/2022]
Abstract
INTRODUCTION In this study, we aimed to evaluate the effects of maxillary protraction using traditional labiolingual arches and implant-type protraction devices before orthopedic treatment of patients with skeletal Class III malocclusion. METHODS A 3-dimensional finite element model of the maxillofacial bones with high biologic similarity and including the sutures was constructed. Through stress and displacement calculations, a biomechanical study was performed for the maxillofacial bones, mandible, and sutures. RESULTS We quantified detailed changes in the sutures with 2 protraction methods to analyze their effects on the growth of the maxillofacial bones. CONCLUSIONS (1) The labiolingual arch is suitable for skeletal Class III patients with crossbite and deep overbite. The frontomaxillary and zygomaticomaxillary sutures played major roles in the forward displacement and counterclockwise rotation of the maxilla. The temporozygomatic and pterygopalatine sutures did not change significantly. (2) The implant type of protraction device is suitable for skeletal Class III patients with crossbite and open bite. Both the frontomaxillary and zygomaticomaxillary sutures played decisive roles in the forward displacement and clockwise rotation of maxilla. The temporozygomatic and pterygopalatine sutures showed small changes. (3) The labiolingual arch caused less stimulatory growth on the maxilla, whereas the implant caused greater stimulatory growth on the maxilla. Protraction with the labiolingual arch is more suitable for early skeletal Class III patients at a younger age; protraction with an implant is applicable to skeletal Class III patients in the late mixed dentition or early permanent dentition.
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Affiliation(s)
- Chang Liu
- Assistant professor, Changchun Stomatological Hospital; assistant professor, School of Stomatology, Jilin University, Changchun, Jilin, China
| | - Xianchun Zhu
- Associate professor, School of Stomatology, Jilin University, Changchun, Jilin, China.
| | - Xing Zhang
- Associate professor, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin, China
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Kim SJ, Kim KH, Yu HS, Baik HS. Dentoalveolar compensation according to skeletal discrepancy and overjet in skeletal Class III patients. Am J Orthod Dentofacial Orthop 2014; 145:317-24. [PMID: 24582023 DOI: 10.1016/j.ajodo.2013.11.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 11/01/2013] [Accepted: 11/01/2013] [Indexed: 11/16/2022]
Abstract
INTRODUCTION This study was designed to investigate dentoalveolar compensation in untreated skeletal Class III patients with either positive or negative overjet. METHODS The positive overjet groups consisted of 104 adults, divided into group 1 (angle between sella-nasion to mandibular plane (SN-MP) > 38°, n = 30), group 2 (30° < SN-MP < 38°, n = 43), and group 3 (SN-MP <30°, n = 31). The negative overjet groups (groups 4-6) consisted of 90 adults who were closely matched to the positive overjet groups with regard to the ANB and SN-MP angles. Twenty-two cephalometric measurements were compared between the matched groups. In the positive overjet groups, correlation analysis was performed between the skeletal and dental measurements, and regression analysis was performed to determine the incisor-mandibular plane angle. RESULTS The maxillary incisors were more proclined and the occlusal plane was more flattened in the positive overjet groups than in the negative overjet groups; however, there was no statistically significant difference between them with regard to mandibular incisor inclination. The inclinations of the maxillary and mandibular incisors were correlated with both the sagittal and vertical skeletal measurements. Eight regression equations for the incisor-mandibular plane angle were calculated with the highest coefficient of determination of 0.547. CONCLUSIONS Proclination of the maxillary incisors and flattening of the occlusal plane contributed to a positive overjet. Mandibular incisor inclination was more closely associated with sagittal and vertical skeletal discrepancies and was not affected by the incisal relationship.
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Affiliation(s)
- Sung-Jin Kim
- Lecturer, Department of Orthodontics, School of Dentistry, Yonsei University, Seoul, South Korea
| | - Kyung-Ho Kim
- Professor, Department of Orthodontics, School of Dentistry, Yonsei University, Seoul, South Korea
| | - Hyung-Seog Yu
- Professor, Department of Orthodontics, School of Dentistry, Yonsei University, Seoul, South Korea
| | - Hyoung-Seon Baik
- Professor, Department of Orthodontics, School of Dentistry, Yonsei University, Seoul, South Korea.
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Halvorsen ET, Beddari IY, Schilbred Eriksen E, Boe OE, Wisth PJ, Loes S, Moen K. Relapse and stability after mandibular setback surgery one year postoperatively: a retrospective study. J Oral Maxillofac Surg 2014; 72:1181.e1-11. [PMID: 24831939 DOI: 10.1016/j.joms.2014.02.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Revised: 02/17/2014] [Accepted: 02/18/2014] [Indexed: 11/15/2022]
Abstract
PURPOSE A retrospective evaluation was performed of dentoalveolar and skeletal stability 1 year after mandibular setback surgery using intraoral vertical subcondylar osteotomy (IVSO) combined with intermaxillary fixation. PATIENTS AND METHODS Twenty-eight patients (16 men, 12 women) with skeletal Angle Class III malocclusions were included. Mean age at start of treatment was 23.9 years. All patients underwent combined surgical and orthodontic treatment. Dental casts and cephalometric measurements were performed for each patient before orthodontic treatment and at 8 weeks and 1 year after surgery. RESULTS Treatment changes from 8 weeks to 1 year after surgery were small but significant for the angular relationship between the maxilla and the mandible in the sagittal plane (ANB) (mean difference, -0.5 mm; P = .021), Wits appraisal (mean difference, -0.7 mm; P = .044), the inclination of the mandible in relation to the nasion-sella line (ML-NSL) (mean difference, -0.8 mm; P = .010), and the inclination of the lower incisors in relation to the nasion-point B line (Li-NB) (mean difference, -0.6 mm; P < .001). These findings for cephalometric values indicated a small skeletal relapse in sagittal and vertical relations. No significant dentoalveolar relapse occurred according to the dental cast evaluations. CONCLUSION The results clearly show that orthodontic treatment combined with IVSO provides a stable dental and skeletal result 1 year after treatment.
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Affiliation(s)
- Eirik Torjuul Halvorsen
- Consultant Orthodontist, Section for Orthodontics, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
| | - Ingri Yddal Beddari
- Consultant Orthodontist, Section for Orthodontics, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
| | - Elisabeth Schilbred Eriksen
- Resident Orthodontist, Section for Orthodontics, Department of Clinical Dentistry, University of Bergen, Bergen, Norway.
| | - Olav Egil Boe
- Associate Professor, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
| | - Per Johan Wisth
- Professor Emeritus, Section for Orthodontics, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
| | - Sigbjorn Loes
- Associate Professor and Consulting Oral and Maxillofacial Surgeon, Department of Maxillofacial Surgery, Haukeland University Hospital, Bergen, Norway
| | - Ketil Moen
- Consultant Oral and Maxillofacial Surgeon, Section for Oral and Maxillofacial Surgery, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
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Lippi D, Pierleoni F, Franchi L. Retrognathic maxilla in “Habsburg jaw”. Angle Orthod 2012; 82:387-95. [DOI: 10.2319/072111-461.1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Affiliation(s)
- Donatella Lippi
- Associate Professor, Department of Anatomy, Histology and Legal Medicine, University of Florence, Florence, Italy
| | - Felicita Pierleoni
- Assistant Professor, Department of Craniomandibular Disorders, University of Florence, Florence, Italy
| | - Lorenzo Franchi
- Assistant Professor, Department of Orthodontics, University of Florence, Florence, Italy; Thomas M. Graber Visiting Scholar, Department of Orthodontics and Pediatric Dentistry, School of Dentistry, The University of Michigan, Ann Arbor, Mich
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Primozic J, Farcnik F, Perinetti G, Richmond S, Ovsenik M. The association of tongue posture with the dentoalveolar maxillary and mandibular morphology in Class III malocclusion: a controlled study. Eur J Orthod 2012; 35:388-93. [DOI: 10.1093/ejo/cjs015] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Kochel J, Emmerich S, Meyer-Marcotty P, Stellzig-Eisenhauer A. New model for surgical and nonsurgical therapy in adults with Class III malocclusion. Am J Orthod Dentofacial Orthop 2011; 139:e165-74. [DOI: 10.1016/j.ajodo.2010.09.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2010] [Revised: 09/01/2010] [Accepted: 09/01/2010] [Indexed: 11/26/2022]
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