The Journal of the Korean dental association (대한치과의사협회지)

The Korean Dental Association (대한치과의사협회)
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A longitudinal Study on Change of Mandibular Symphysis using metallic implants

골내 임프란트를 이용한 하악 이부 성장 변화에 대한 종적 연구

  • Chang, HyukJoon (Geonggi Provincial Medical Center) ;
  • Oh, Min-Hee (Department of Orthodontics, Chonnam National University School of Dentistry) ;
  • Jung, Charyong (Department of Anatomy, Chonnam National University Medical School) ;
  • Cho, Jin-Hyoung (Department of Orthodontics, Chonnam National University School of Dentistry)
  • 장혁준 (경기도 의료원) ;
  • 오민희 (전남대학교 치의학전문대학원 치과교정학교실) ;
  • 정채용 (전남대학교 의과대학 해부학교실) ;
  • 조진형 (전남대학교 치의학전문대학원 치과교정학교실)
  • Received : 2017.10.11
  • Accepted : 2017.12.22
  • Published : 2018.02.01
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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, $GoMe{\bot}B$, $GoMe{\bot}Pog$). Among 8 measurements, ANB, SNPog, SN-GoMe, B-Pog//GoMe, $GoMe{\bot}B$ 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, $GoMe{\bot}Pog$. 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.

Keywords

References

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