Skeletal structure of asymmetric mandibular prognathism and retrognathism

Maxillofacial Plastic and Reconstructive Surgery

Research

Thomas Maal¹  Shankeeth Vinayahalingam²  Tong Xi²  Stefaan Bergé²  Tae-Geon Kwon³ 

[1]3D Imaging Lab, Radboud University Nijmegen Medical Centre, Geert Grooteplein 10, 6525 GA, Nijmegen, The Netherlands

[2]Department of Oral and Maxillofacial Surgery, Radboud University Nijmegen Medical Centre, Geert Grooteplein 10, 6525 GA, Nijmegen, The Netherlands

[3]Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyungpook National University, 2177 Dalgubeol-Daero, Jung-Gu, 41940, Daegu, Republic of Korea

关键词: Asymmetry;    Condyle;    Ramus;    Mandibular prognathism;    Retrognathism;   

DOI  :  10.1186/s40902-023-00393-7

 received in 2023-06-16, accepted in 2023-07-17,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundThis study aimed to compare the skeletal structures between mandibular prognathism and retrognathism among patients with facial asymmetry.ResultsPatients who had mandibular asymmetry with retrognathism (Group A) in The Netherlands were compared with those with deviated mandibular prognathism (Group B) in Korea. All the data were obtained from 3D-reformatted cone-beam computed tomography images from each institute. The right and left condylar heads were located more posteriorly, inferiorly, and medially in Group B than in Group A. The deviated side of Group A and the contralateral side of Group B showed similar condylar width and height, ramus-proper height, and ramus height. Interestingly, there were no inter-group differences in the ramus-proper heights. Asymmetric mandibular body length was the most significantly correlated with chin asymmetry in retrognathic asymmetry patients whereas asymmetric elongation of condylar process was the most important factor for chin asymmetry in deviated mandibular prognathism.ConclusionConsidering the 3D positional difference of gonion and large individual variations of frontal ramal inclination, significant structural deformation in deviated mandibular prognathism need to be considered in asymmetric prognathism patients. Therefore, Individually planned surgical procedures that also correct the malpositioning of the mandibular ramus are recommended especially in patients with asymmetric prognathism.

【 授权许可】

CC BY   
© Korean Association of Maxillofacial Plastic and Reconstructive Surgeons 2023

【 图 表 】

Fig. 1

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