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固定义齿(FPD)设计时基牙的选择及基牙数量的确定,按Ante氏原则要求基牙牙周膜总面积应等于或大于缺失牙牙周膜面积之和。但对于伴牙周缺损的基牙其实际存留的牙周膜面积难以确定。且Nyman研究表明只有8%的单端固定义齿(FPD)基牙满足Ante原则,而57%的FPD的病例中,基牙牙周膜面积小于所期望的桥体处失牙牙周膜常规面积的50%,仍可为成功修复体。单端FPD设计,一般主张多基牙,使应力
Fixed denture (FPD) design time abutment choice and determination of the number of abutments, according to Ante's principle requires the total area of the periodontal ligament should be equal to or greater than the total area of the missing periodontal ligament. However, it is difficult to determine the actual periodontal membrane area of abutment with periodontal defect. And the Nyman study showed that only 8% of FPD abutments satisfy Ante's principle, whereas in 57% of FPD cases, the abutment periodontal membrane area is less than the expected normal area of the lost tooth periodontal ligament 50%, still can be a successful restoration. Single-ended FPD design, generally advocated multi-abutment, so stress