편측성 후방연장 국소의치의 의치상에 이탈력이 가해질 때 간접유지장치가 장착된 치아 주위조직에 발생하는 응력에 관한 광탄성 분석
A photoelastic stress anlysis in the surrounding tissues of teeth seated by indirect retainers when applied sidlodiging forces on unilateral distral extention partialldentures
손지영, 이청희, 조광헌,
소속 상세정보
손지영 ( Son Jee-Young ) - 경북대학교 치과대학 보철학교실
이청희 ( Lee Cheong-Hee ) - 경북대학교 치과대학 보철학교실
조광헌 ( Jo Kwang-Hun ) - 경북대학교 치과대학 보철학교실
KMID : 0362419960340030415
Abstract
The purpose of this study was to evaluate the stress distributions in the surrounding tissues of the teeth seated by indirect retainers in three different teeth of unilateral distal extension partial denture when the dislodging forces were
applied on denture bases. Three dimensional photoelastic models were made. The teeth on which indirect retainers were seated were mandibular left lateral incisor (Model I), canine (Model II), and first premolar (Model III). The dislodging force with 860gm at 45°angulation to occlusal plane was applied to each model. Three dimensional photoelastic stress analysis was done, and the records were diagramed and analysed. @ES The results were as follows : @EN The compressive stresses were shown the most on neck portions of buccal, mesial, and distal sides in all three models. Slight tensile stresses were shown on neck portions of lingual sides in all three models. The compressive stresses on buccal side were shown in strength in such order as model I, model II, and model III. The compressive stresses were shown on neck portion of mesial and distal sides of model I and mode II, with model I more than Model II. The compressive stresses were shown only on neck portion of mesial side on Model III. The general overall magnitude of compressive stresses were shown in strength in such order as Model I, Model II, and Model III.
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