论文部分内容阅读
为了保存全口义齿下的支持骨,而保留一些牙根是一项已被接受的治疗方法。保留牙根也有利于活动部分义齿,但却出现了支点位置发生改变以及与此相关的杠杆作用问题。为保存远中游离活动部分义齿基托下的牙槽骨,而在基牙远中端保留一些牙根。在这种情况下,支点不在基牙上,而是在基牙远中的保留牙根上,在行使功能期间,义齿则围绕该支点旋转。这种支点关系可以得到逻辑上推理,本研究的目的是证实这种推理。于双侧远中游离缺牙的下颌模型上,用3毫米厚的硅橡胶置于牙嵴区以模拟粘膜,
In order to preserve the supporting bone under a complete denture, retaining some roots is an accepted treatment. Retaining the root of the tooth also favors the moving part of the denture, but there is a shift in the position of the fulcrum and the associated leverage problem. In order to preserve the alveolar bone under the free-standing part of the denture base, some roots remain at the distal end of the abutment. In this case, the fulcrum does not lie on the abutment, but rather on the remaining root in the abutment, around which the denture rotates during functioning. This pivot relationship can be logically reasoned, the purpose of this study is to confirm this reasoning. On both sides of the mandibular model of distant tooth loss, with 3 mm thick silicone rubber placed in the ridge area to simulate the mucosa,