Evaluation and Comparison the Morphological Dimension of Mandibular Symphysis in Skeletal Class i and Class ii Individuals with Different Growth Patterns: A Cephalometric Study

Authors

  • Akshaya Rajagopal

DOI:

https://doi.org/10.53555/bp.v4i7.653

Abstract

Mandibular symphysis is an anatomical structure of the mandible in which the lower incisors and  the anterior portion of the chin are found. It is morphologically divided into two regions, the dentoalveolar and basal symphyses.1 The dentoalveolar symphysis consists of alveolar process and lower incisors. Alveolar bone thickness varies according to location and facial type.2 Generally, there is a greater bone thickness at the apex then in the cervical region and towards the lingual surface when compared to the labial surface.2 The lingual side of cortical bone is thicker than the buccal and there is a closer approximation of the root apex to the lingual cortical. The basal symphysis is a part of the main body of the mandibular symphysis with more apical location. The morphological variation of the menton has a strong genetic basis.

Downloads

Download data is not yet available.

References

1.Nojima K, Nakakawaji K, SakamotoT, Isshiki Y. Relationships between mandibular symphysis morphology and lower incisor inclination in skeletal Class III malocclusion requiring orthognatic surgery. Bull Tokyo Dent. Coll 1998;39:175-81.
2. Handelman CS. The anterior alveolus: its importance in limiting orthodontic treatment and its influence on the occurrence of iatrogenic sequelae. Angle Orthod. 1996;66:95-110.
3. Bjork A. Prediction of mandibular growth rotation. Am J Orthod. 1969;55:585–599.
4. Aki T, Nanda RS, Currier GF, Nanda SK. Assessment of symphysis morphology as a predictor of the direction of mandibular growth. Am J Orthod Dentofacial Orthop.1994;106:60-9.
5.von Bremen J, Pancherz H. Association between Björk’s structural signs of mandibular growth rotation and skeletofacial morphology. Angle Orthod.2005;75:506-9
6. Skieller V, Björk A, Linde-Hansen T. Prediction of mandibular growth rotation evaluated from a longitudinal implant sample. Am J Orthod. 1984;86:359-70.
7. Arnett GW, Jelic JS, Kim J, Cummings DR, Beress A, Worley CM Jr et al. Soft tissue cephalometric analysis: diagnosis and treatment planning of dentofacial deformity.Am J Orthod Dentofacial Orthop. 1999;116:239-53.
8.Batista KBSL, Paiva JB, Rinoneto J, Queiroz GV, Bozzini MF, Farias B. Avaliações tegumentares, esqueléticas e dentárias do perfil facial. Rev Clin Ortodon Dental Press. 2007;5:95-105.
9. Martins AN. Inclinação da sínfise em relação aos padrões faciais em pacientes leucodermas, sul-brasileiros, portadores de má-oclusão de Classe I, de Classe II (divisão I) e de Classe III de Angle. Ortodontia Paranaense. 1991;12:1-19.
10.Tweed CH. The Frankfort-mandibular incisor angle (FMIA) in orthodontic diagnosis, treatment planning and prognosis. Angle Orthod. 1954;24:121-9.
11. Diedrich P. Problems and risks in the movement of the mandibular anterior teeth.
12. Artun J, Krogstad O. Periodontal status of mandibular incisors following excessive proclination. A study in adults with surgically treated mandibular prognathism. Am J Orthod Dentofacial Orthop. 1987;91:225-32.
13. Bimstein E, Crevoisier RA, King DL. Changes in the morphology of the buccal alveolar bone of protruded mandibular permanent incisors secondary of orthodontic alignment. Am J Orthod Dentofacial Orthop. 1990;97:427-30.
14. Dorfman HS. Mucogingival changes resulting from mandibular incisor tooth
15. Engelking G, Zachrisson BU. Effects of incisor repositioning on monkey periodontium after expansion through the cortical plate. Am J Orthod.1982;82:23-32.
16. Melsen B, Allais D. Factors of importance for the development of dehiscences during labial movement of mandibular incisors: a retrospective study of adult orthodontic patients. Am J Orthod Dentofacial Orthop. 2005;127:552-61.
17.Steiner GG, Pearson JK, Ainamo J. Changes of the marginal periodontium as a result of labial tooth movement in monkeys. J. Periodontol. 1981;52:314-20.
18.Wehrbein H, Bauer W, Diedrich P. Mandibular incisors, alveolar bone and symphysis after orthodontic treatment. A retrospective study. Am J Orthod Dentofacial Orthop. 1996;110:239-46.
19. Yared KF, Zenobio EG, Pacheco W. Periodontal status of mandibular central incisors after orthodontic proclination in adults. Am J Orthod Dentofacial Orthop.2006;130:6.e1-8.








31. Mulie RM, Hoeve AT. The limitations of tooth movement within the symphysi,studied with laminography and standardized occlusal films. J Clin Orthod.1976;10:882-93.
32. Sarikaya S, Haydar B, Ciger S, Ariyürek M. Changes in alveolar bone thickness due to retraction of anterior teeth. Am J Orthod Dentofacial Orthop. 2002;122:15-26.
33. Engelking G, Zachrisson BU. Effects of incisor repositioning on monkey periodontium after expansion through the cortical plate. Am J Orthod.1982;82:23-32.
34. Steiner GG, Pearson JK, Ainamo J. Changes of the marginal periodontium as a result of labial tooth movement in monkeys. J. Periodontol. 1981;52:314-20.
34. Ichim I, Swain M, Kieser JA. Mandibular biomechanics and the development of the human chin. J Dent Res. 2006;85:638-42.
36 Aki T, Nanda RS, Currier GF, Nanda SK. Assessment of symphysis morphology as a predictor of the direction of mandibular growth. Am J Orthod Dentofacial Orthop.1994;106:60-9.
37.von Bremen J, Pancherz H. Association between Björk’s structural signs of mandibular growth rotation and skeletofacial morphology. Angle Orthod.2005;75:506-9
38. Skieller V, Björk A, Linde-Hansen T. Prediction of mandibular growth rotation evaluated from a longitudinal implant sample. Am J Orthod. 1984;86:359-70.
39. Arnett GW, Jelic JS, Kim J, Cummings DR, Beress A, Worley CM Jr et al. Soft tissue cephalometric analysis: diagnosis and treatment planning of dentofacial deformity.Am J Orthod Dentofacial Orthop. 1999;116:239-53.
40.Batista KBSL, Paiva JB, Rinoneto J, Queiroz GV, Bozzini MF, Farias B. Avaliações tegumentares, esqueléticas e dentárias do perfil facial. Rev Clin Ortodon Dental Press. 2007;5:95-105.

Downloads

Published

2019-05-31

How to Cite

Rajagopal, A. (2019). Evaluation and Comparison the Morphological Dimension of Mandibular Symphysis in Skeletal Class i and Class ii Individuals with Different Growth Patterns: A Cephalometric Study. International Journal For Research In Biology & Pharmacy, 4(7), 01–12. https://doi.org/10.53555/bp.v4i7.653