Journal of the Korean Association of Oral and Maxillofacial Surgeons

The Korean Association of Oral and Maxillofacial Surgeons (대한구강악안면외과학회)
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Soft tissue changes in skeletal class II patients treated with bilateral sagittal split osteotomy advancement surgery

골격성 II 급 부정교합 환자의 하악골 전진술 후 연조직 변화 분석

  • Shin, Hee-Jin (Department of Oral and Maxillofacial Surgery, Seoul St. Mary's Dental Hospital) ;
  • Kim, Jin-Wook (Graduate school of clinical dental science, the Catholic University) ;
  • Park, Je-Uk (Department of Oral and Maxillofacial Surgery, Seoul St. Mary's Dental Hospital)
  • 신희진 (가톨릭대학교 서울성모치과병원 구강악안면외과학교실) ;
  • 김진욱 (가톨릭대학교 임상치과학대학원) ;
  • 박재억 (가톨릭대학교 서울성모치과병원 구강악안면외과학교실)
  • Received : 2010.02.18
  • Accepted : 2010.03.30
  • Published : 2010.04.30
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Abstract

The purpose of this study was to examine the soft tissue changes in skeletal class II patients after mandibular advancement by bilateral sagittal split ramus osteotomy (BSSRO). In Asian population, the incidence of skeletal class II malocclusion is lower than that of skeletal class III malocclusion unlike the caucasians. This study was conducted to figure out the ratio at which hard tissue and soft tissue changes after mandibular advancement by analyzing cephalograms of 13 patients that have undergone the mandibular advancement surgery. As a result, change ratios of Li, B', Pog' according to the movement of li, B, Pog were found to be 0.59, 1.06, 0.82. Also, vertical height of vermilion zone (Si-Vb) and lower lip and chin (Si-Me') were measured to evaluate vertical changes. Vermilion zone showed tendency to decrease by 1.02 mm on the average postoperatively, whereas vertical length of lower lip and chin showed tendency to increase by 3.57 mm on the average.

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References

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