牙周炎指标的作成方法、其作成装置、其作成程式、记录有该程式的记录媒体与牙周炎的诊断方法、其诊断装置、其诊断程式及记录有该程式的记录媒体;PERIODONTAL INDEX CREATION METHOD, PERIODONTAL INDEX CREATION APPARATUS, PERIODONTAL INDEX CREATION PROGRAM, AND RECORDING MEDIUM HAVING RECORDS OF PERIODONTAL INDEX CREATION PROGRAM, AND PERIODONTITIS DIAGNOSIS METHOD PERIODONTITIS DIAGNOSIS APPARATUS, PERIODONTITIS DIAGNOSIS PROGRAM, AND RECORDING MEDIUM HAVING RECORDS OF PERIODONTITIS DIAGNOSIS PROGRAM

摘要

本发明系将不能保留而被拔牙之复数根牙齿作为对象，依据依各牙齿种类分别抽出复数根所测定之各牙齿的样本附连高度(M)、及总齿根模面积(S)来算出丧失齿根模面积(SL)后，再将经反映各牙齿的咬合力之仅因各牙齿种类而相异之咬合力系数(B)、与各牙齿之丧失时的丧失齿根模面积(SLB)之间的关系依各牙齿种类进行统计处理，利用此时两者之间存有直线式关系之事实，以作成表示咬合力系数(B)、与牙齿之丧失时的丧失齿根模面积(SLB)之间的关系之直线的数式，将根据前述牙齿之丧失时的丧失齿根模面积(SLB)所求出之(掺加有咬合力之残存齿根模面积(SSB)/总齿根模面积(S))×100(%)，作为表示牙周炎的进行程度之牙周炎指标BPI加以算出。 The present invention includes calculating a lost periodontal membrane area (SL) based on a sample attachment level (M) and a total periodontal membrane area (S), wherein the sample attachment level (M) of each tooth is measured after a plurality of tooth are sampled for each tooth type , with respect to a plurality of teeth which can not be conserved and have been extracted . Furthermore, the relation between the bite force coefficient (B) which is different only due to tooth type and reflects the bite force of each tooth, and a lost periodontal membrane area (SLB) at the time of loss of each tooth is statistically processed for each tooth type, and a linear equation showing the relation between the bite force coefficient (B) and the lost periodontal membrane area (SLE) at the time of loss of each tooth is prepared by use of the presence of a linear relation between both parameters (remaining periodontal membrane area (SSB) /total periodontal membrane area (S)) ×