Clinico-statistical Study on Orthognathic Surgery during Recent 10 Years.

概要

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Two hundred and thirty-one cases (223 patients) undergoing Orthognathic surgery were studied cinico-statistically between January 1985 and December 1994. The results were as follows: 1. The number of operations have increased recently, 85% of all operations were performed during 10 recent years. 2. The ratio of male to female was 1: 1.73. The age of the cases at operation ranged from 15 to 44 years, and 135 cases (61%) were under 21 years-old. 3. The number of mandibular protrusions was 191 (86%) cases, and 58 cases (26%) were complicated with cleft anomaly. 4. According to the classification of mandibular prognathism (modified Sanborn-Hanada's classification) showed high distribution of maxillary retrusion. 5. The mandibular osteotomy was performed in 182 cases (79%), maxillary osteotomy was performed in only 12 cases (5%), and simultaneous maxillomandibular osteotomy was performed in 37 cases (16%). 6. The blood loss was 621±353ml with bilateral sagittal split ramus osteotomy (SSRO) and 1, 360±471ml with Le Fort-I osteotomy and SSRO. The operating time was 274±78 min. with SSRO and 461±81 min. with Le Fort-I osteotomy and SSRO. 7. Autologous transfusion was applied from 1988, so homologous transfusion was needed in only 3% cases undergoing SSRO and 14% of those undergoing Le Fort-I osteotomy and SSRO.
特定非営利活動法人日本顎変形症学会の論文