Mandibular Symphyseal Height Determination in Various Vertical Patterns: Mandibular Symphyseal Height in Vertical Patterns

Saadia Ata; Anum Aziz; Muhammad Azeem; Qasim Khalid; Kashif Haroon; Saira Butt; Naseer Ahmad Chaudhary

doi:10.54393/pjhs.v6i6.2609

Authors

Saadia Ata Department of Orthodontics, Akhtar Saeed Medical and Dental College, Lahore, Pakistan
Anum Aziz Department of Orthodontics, Avicenna Dental College, Lahore, Pakistan
Muhammad Azeem Department of Orthodontics, de' Montmorency College, Lahore, Pakistan
Qasim Khalid Department of Orthodontics, Combined Military Hospital, College of Dentistry, Lahore, Pakistan
Kashif Haroon Department of Orthodontics, Azra Naheed Dental College, Lahore Pakistan
Saira Butt Akhtar Saeed Medical and Dental College Lahore, Pakistan
Naseer Ahmad Chaudhary Department of Orthodontics, Fatima Memorial Hospital, College of Medicine and Dentistry, Lahore, Pakistan

DOI:

https://doi.org/10.54393/pjhs.v6i6.2609

Keywords:

Mandibular Symphysis, Vertical Facial Pattern, Skeletal Class I, Symphyseal Dimensions, Sexual Dimorphism

Abstract

The mandibular symphysis is a crucial anatomical structure influencing facial aesthetics and harmony. Its morphology is pivotal in determining optimal lower incisor positioning, especially in borderline orthodontic cases requiring meticulous treatment planning. Objective: To determine and compare symphyseal dimensions in different vertical patterns of skeletal class I cases. Methods: The study was designed as a cross-sectional study. Data was analyzed using SPSS 25, with mean and standard deviations used for quantitative variables and frequency and proportions for qualitative data. Statistical significance was assessed using chi-square tests for gender and ANOVA for symphysis height and vertical facial patterns, with a P-value ≤0.05 considered significant. Results: Male subjects with Hypodivergent (↓D), Normodivergent (ND)and Hyperdivergent (↑D) profiles showed no statistically significant difference in Id-Me, whereas female subjects showed statistically significant difference in Id-Me between (↓D) and (↑D) subjects. Additionally, a notable sex difference was observed in Id-Me, with significant variations between males and females. In contrast, the differences in LI between males and females were found to be statistically non-significant (P > 0.05). Conclusion: This article reflected that males show longer chin than females.

References

Tunis TS, May H, Sarig R, Vardimon AD, Hershkovitz I, Shpack N. Are chin and symphysis morphology facial type-dependent? A computed tomography-based study. American Journal of Orthodontics and Dentofacial Orthopedics. 2021 Jul; 160(1): 84-93. doi: 10.1016/j.ajodo.2020.03.031. DOI: https://doi.org/10.1016/j.ajodo.2020.03.031

Uengkajornkul P, Mahatumarat K, Panmekiate S. Relationship between Symphysis Dimensions and Mandibular Incisors' Alveolar Bone Thickness in Different Vertical Skeletal Patterns. Journal of the Dental Association of Thailand. 2020 Apr; 70(2): 140. doi: 10.1590/2177-6709.23.1.054-062.oar. DOI: https://doi.org/10.1590/2177-6709.23.1.054-062.oar

D'Amato G, Tofangchiha M, Sheikhdavoodi N, Mohammadi Z, Ranjbaran M, Jabbarian R et al. Relationship between Skeletal Malocclusion and Radiomorphometric Indices of the Mandible in Long Face Patients. Diagnostics. 2024 Feb; 14(5): 459. doi: 10.3390/diagnostics14050459. DOI: https://doi.org/10.3390/diagnostics14050459

Evangelista K, Silva MA, Normando D, Valladares-Neto J. Factors associated with the morphology of the mandibular symphysis and soft tissue chin. Dental Press Journal of Orthodontics. 2021 Sep; 26: e2119347. doi: 10.1590/2177-6709.26.4.e2119347.oar. DOI: https://doi.org/10.1590/2177-6709.26.4.e2119347.oar

Ahn MS, Shin SM, Yamaguchi T, Maki K, Wu TJ, Ko CC et al. Relationship between the maxillofacial skeletal pattern and the morphology of the mandibular symphysis: Structural equation modeling. Korean Journal of Orthodontics. 2019 May; 49(3): 170. doi: 10.4041/kjod.2019.49.3.170. DOI: https://doi.org/10.4041/kjod.2019.49.3.170

Ruiz F, Venezia P, Ronsivalle V, Lacagnina C, Conforte C, Isola G et al. Geometric morphometric analysis of Mandibular Symphysis Growth between 12 and 15 years of age in class II malocclusion subjects. Life. 2023 Feb; 13(2): 543. doi: 10.3390/life13020543. DOI: https://doi.org/10.3390/life13020543

Linjawi AI, Afify AR, Baeshen HA, Birkhed D, Zawawi KH. Mandibular symphysis dimensions in different sagittal and vertical skeletal relationships. Saudi Journal of Biological Sciences. 2021 Jan; 28(1): 280-5. doi: 10.1016/j.sjbs.2020.09.062. DOI: https://doi.org/10.1016/j.sjbs.2020.09.062

Khan EB, Kumari H, Bibi A, Mottani DA, Kumar S. The Comparison of Symphysis Morphology in Normodivergent Patients of Short and Normal Mandible: Comparison of Symphysis Morphology. Journal of the Dow University of Health Sciences. 2021 Jan; 15(1): 35-40. doi: 10.36570/jduhs.2021.1.1103. DOI: https://doi.org/10.36570/jduhs.2021.1.1103

Olbrisch C, Santander P, Moser N, Klenke D, Meyer-Marcotty P, Quast A. Three-dimensional mandibular characteristics in skeletal malocclusion: a cross-sectional study. Journal of Orofacial Orthopedics/Fortschritte der Kieferorthopädie. 2024 Mar; 85(2): 134-45. doi: 10.1007/s00056-022-00419-1. DOI: https://doi.org/10.1007/s00056-022-00419-1

Chen H, Liu Z, Hu X, Wu B, Gu Y. Comparison of mandibular cross-sectional morphology between Class I and Class II subjects with different vertical patterns: based on CBCT images and statistical shape analysis. BioMed Central Oral Health. 2021 May; 21(1): 238. doi: 10.1186/s12903-021-01591-3. DOI: https://doi.org/10.1186/s12903-021-01591-3

Chu CS, Marizan Nor M, Mohamed AM, Mohd Hadi Pritam H. Hard and soft tissue shape variation and changes in Class II division 1 malocclusion during orthodontic treatment: a geometric morphometric analysis. BioMed Central Oral Health. 2023 Nov; 23(1): 931. doi: 10.1186/s12903-023-03684-7. DOI: https://doi.org/10.1186/s12903-023-03684-7

Maspero C, Farronato M, Bellincioni F, Cavagnetto D, Abate A. Assessing mandibular body changes in growing subjects: A comparison of CBCT and reconstructed lateral cephalogram measurements. Scientific Reports. 2020 Jul; 10(1): 11722. doi: 10.1038/s41598-020-68562-6. DOI: https://doi.org/10.1038/s41598-020-68562-6

Khojastepour L, Naderi A, Akbarizadeh F, Movahhedian N, Ahrari F. Symphysis morphology and mandibular alveolar bone thickness in patients with β-thalassemia major and different growth patterns. Dental Press Journal of Orthodontics. 2022 May; 27(02): e22205. doi: 10.1590/2177-6709.27.2.e22205.oar. DOI: https://doi.org/10.1590/2177-6709.27.2.e22205.oar

Ono T, Kurabayashi T, Oishi S, Ishida Y, Sakaguchi-Kuma T. Cone-beam computed tomography-based quantitative analysis of the thickness of mandibular alveolar bone in adult females with different vertical facial patterns. APOS Trends in Orthodontics. 2020 Mar; 10: 25-31. doi: 10.25259/APOS_11_2020. DOI: https://doi.org/10.25259/APOS_11_2020

Zhang X, Gao J, Sun W, Zhang H, Qin W, Jin Z. Evaluation of alveolar bone morphology of incisors with different sagittal skeletal facial types by cone beam computed tomography: A retrospective study. Heliyon. 2023 Apr; 9(4). doi: 10.1016/j.heliyon.2023.e15369. DOI: https://doi.org/10.1016/j.heliyon.2023.e15369

Hashim HA, Gsouma I, Ahmed SS, Hashim MH. Cephalometric Norms in Sudanese Sample: A Pilot Study. European Journal of Medical and Health Sciences. 2023 Mar; 5(2): 20-4. doi: 10.24018/ejmed.2023.5.2.1646. DOI: https://doi.org/10.24018/ejmed.2023.5.2.1646

Gininda DM and Khan MI. A radiographic analysis of Mandibular Symphysis dimension in black South African adult patients with differing skeletal patterns. South African Dental Journal. 2022 May; 77(4): 208-15. doi: 10.17159/2519-0105/2022/v77no4a3. DOI: https://doi.org/10.17159/2519-0105/2022/v77no4a3

Sendyk M, Cevidanes LH, de Oliveira Ruellas AC, Fattori L, Mendes FM, de Paiva JB et al. Three-dimensional evaluation of dental decompensation and mandibular symphysis remodeling on orthodontic-surgical treatment of Class III malocclusion. American Journal of Orthodontics and Dentofacial Orthopedics. 2021 Feb; 159(2): 175-83. doi: 10.1016/j.ajodo.2019.12.020. DOI: https://doi.org/10.1016/j.ajodo.2019.12.020

Anwar N and Fida M. Evaluation of dentoalveolar compensation in skeletal class II malocclusion in a Pakistani University Hospital setting. Journal of the College of Physicians and Surgeons Pakistan. 2009 Jan; 19(1): 11.

Ralte L, Singh GK, Singh A, Sharma VK. Assessment of chin morphology in different skeletal dysplasia-A cross-sectional study. National Journal of Maxillofacial Surgery. 2022 May; 13(2): 229-33. doi: 10.4103/njms.njms_418_21. DOI: https://doi.org/10.4103/njms.njms_418_21

Iijima Y, Tachiki C, Ariizumi D, Yamamoto M, Takaki T, Watanabe A et al. Movement of Mandibular Incisors in Patients With Skeletal Class III During the Surgical Orthodontic Treatment. Cureus. 2025 Jan; 17(1). doi: 10.7759/cureus.77588. DOI: https://doi.org/10.7759/cureus.77588

Esenlik E and Sabuncuoglu FA. Alveolar and symphysis regions of patients with skeletal class II division 1 anomalies with different vertical growth patterns. European Journal of Dentistry. 2012 Apr; 6(02): 123-32. doi: 10.1055/s-0039-1698941. DOI: https://doi.org/10.1055/s-0039-1698941

Khan MY, Kishore MS, Bukhari SA, RAcHAlA MR, Sashidhar NR. Alveolar and skeletal chin dimensions associated with lower facial height among different divergent patterns. Journal of Clinical and Diagnostic Research. 2016 May; 10(5): ZC75. doi: 10.7860/JCDR/2016/19932.7811. DOI: https://doi.org/10.7860/JCDR/2016/19932.7811