The distribution and trend of surgical-orthodontic patients in dental college hospital of Yonsei University

Abstract

The number of patients undergoing surgical-orthodontic treatment has been increasing. This change is due to development of surgical-orthodontic techniques and efforts of orthodontists and oral and maxillofacial surgeons to recommend orthognathic surgery for better balanced esthetics other than camouflage treatment. But there has not been enough epidemiological study on distribution and trend of surgical-orthodontic cases.In this study, trends and distributions of patients undergoing surgical-orthodontic treatment in Dental College Hospital of Yonsei University between 2001 and 2010, were evaluated by age, sex and other characteristics.1.The number of surgical-orthodontic patients has increased, and comparing 2001 with 2010, the number of patients doubled.2.Sex distribution of surgical-orthodontic patients did not have significant changes over a decade, showing mean ratio of 1.05:1 (female: male).3.Age distribution had shown 20-24 year-old group being the largest (53.9%), followed by 25-29 year-old group (19.3%), under 19 year-old group (18.4%), 30-34 year old group (5.6%), 35-39 year-old group (2.1%) and over 40 year old group (0.6%).4.Distributions in the types of malocclusion had shown: 4.2% for Class l, 12.8% for Class ll, and 83.0% for Class lll. Class lll group constantly comprised outstandingly most prevalent group over the time. 5.2-Jaw surgery cases (81.1%) had outnumbered 1-Jaw surgery cases (18.9%), with a general trend toward 2-Jaw surgery over the 10 year period. In 1-Jaw surgery cases, mandibular surgery only outnumbered maxillary surgery only cases. For techniques on mandibular surgery, percentage of sagittal split ramus osteotomy was 24.1% whereas that of intraoral vertical ramus osteotomy was 76.2%.6.Geographic distributions showed majority of patients from the nearby areas: 55.7% from within the same city, Seoul, 34.1% of the patients were from the same province, Kyounggi-Do, and 10.2% from other district of the country.From this study we could take adequate informations regarding the characteristics of surgical-orthodontic patients, and the changing trend about treatment modality.