Objective To determine the influence of the clasp design on abutment tooth of the partial denture. 目的探讨可摘局部义齿基牙的应力分布及新的测试装置。
There was no change in maximum stress when the thickness of periodontal membrane of fixed abutment tooth was less than 0.1 mm. 当固定桥基牙牙周膜厚度小于0.
A female patient, aged 59 years old, underwent immediate implantation of the abutment tooth attached by a magnet in an overdenture. 摘要报告1例59岁女性患者，下颌永磁体同位的覆盖义齿基牙脱位后即刻再植。
Results It was shown that periodontal support loss results in increased stress of the terminal abutment tooth without sudden changes. 结果基牙牙周组织吸收导致支持组织应力增加，但其分布形式没有改变。
Methods Casting process was adopted for the preparation of the clasp, which was fixed at the points on the mesial and distal surfaces of the abutment tooth. 方法采用铸造法制作卡环,固位点在基牙的近远中面,与基牙呈点状接触。
The modified RPI clasp could provide adequate retention with the minimum undercut of the most distal part of abutment tooth and gain good esthetical effect. 改良RPI卡环的I杆固位尖端只需进入基牙颊面最远中的较小倒凹则可获得足够的固位，而且更美观。