A longitudinal Study on Change of Mandibular Symphysis using metallic implants

Chang,  HyukJoon; Oh,  Min-Hee; Jung,  Charyong; Cho,  Jin-Hyoung

doi:2018.56.2.94

J Korean Dent Assoc > Volume 56(2); 2018 > Article

The Journal of The Korean Dental Association 2018;56(2):94-102.
DOI: https://doi.org/10.22974/jkda.2018.56.2.002 Published online February 28, 2018.

골내 임프란트를 이용한 하악 이부 성장 변화에 대한 종적 연구

장혁준¹, 오민희², 정채용³, 조진형⁴

^¹경기도 의료원
^²전남대학교 치의학전문대학원 치과교정학교실
^³전남대학교 의과대학 해부학교실
^⁴전남대학교 치의학전문대학원 치과교정학교실

A longitudinal Study on Change of Mandibular Symphysis using metallic implants

HyukJoon Chang¹, Min-Hee Oh², Charyong Jung³, Jin-Hyoung Cho⁴

¹Geonggi Provincial Medical Center
²Department of Orthodontics, Chonnam National University School of Dentistry
³Department of Anatomy, Chonnam National University Medical School
⁴Department of Orthodontics, Chonnam National University School of Dentistry

Abstract

The present study was conducted to assess the growth changes of human chin in childhood and adolescence at various stages of skeletal maturation using metallic implant installed in mandibular body. Lateral cephalographs including 23 subjects (9 males and 14 females) between 7-18 years old were used, which had been taken at University of California in San Francisco and kept at University of the Pacific. Three lateral cephalographs were chosen for each subject according to CVM (Cervical Vertebral Maturation) method (CVM stage 1 to 2, CVM stage 3 to 4, and CVM stage 5 to 6) which assess the extent of the skeletal maturation using the second, third, and fourth cervical vertebrae. V-ceph was used in order to mark the 8 landmarks (S, N, A, B, Pog, Me, Go, Imp) on lateral cephalographs and obtain 8 angular and linear measurements(ANB, SNPog, SN-GoMe, Imp-B, Imp-Pog, B-Pog//GoMe, GoMebotB, GoMebotPog). Among 8 measurements, ANB, SNPog, SN-GoMe, B-Pog//GoMe, GoMebotB showed statistically significant growth changes at various stages of skeletal maturation according to CVM method, while there were no significant differences on Imp-B, Imp-Pog, GoMebotPog. The results suggest that the increasing prominence of human chin is greatly influenced by the vertical growth of B point area, in addition to the change and growth in chin and mandible proper.

Key Words: metallic implant study;longitudinal study;chin;lateral cephalograph;