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KMID : 0352419930120020220
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Keimyung Medical Journal
1993 Volume.12 No. 2 p.220 ~ p.229
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Study on the Relapse after Surgical Correction of Mandibular Prognathism
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이용오
문선혜/서혜경/박노부/서연호
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Abstract
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This study was undertaken to examine relapse tendency after mandibular setback.
Seven cases were selected from patients who underwent orthodontic treatment and mandibular setback surgery in our department.
The serial lateral cephalogram of each patient were obtained and analyzed:
@ES The result were as follows:
@EN 1. By operation, Gn(H) moved backward (average 8.2mm), SNB angle decreased(average 4.4°).
2. When the long term follow-up measurement were compared with the immediate postop. mesurements.
SNB angle increased on average by 0.9°and relapse rate was 21.1%.
GN(H) returned forward on average by 1.3mm in 6 cases, moved backward by 4mm in 1 case.
SN-MP and gonial angle increased on average by 2.2°, 5.8°respectively.
Gn(V) stayed unchanged in 4 cases, increased in 2 cases, decreased in 1 case.
Upper and lower incisors slightly moved labially or lingually.
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KEYWORD
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FullTexts / Linksout information
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Listed journal information
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