Wiskott H W, Nicholls J I, Belser U C
University of Geneva, Switzerland.
Int J Prosthodont. 1996 Mar-Apr;9(2):117-39.
This study investigated the relationship between abutment total occlusal convergence angle (taper) and the resistance of cemented crowns subjected to dynamic loading. Crown and abutment analogs were placed using zinc-oxide-eugenol, zinc-phosphate, glass-ionomer, or resin composite cement. Total occlusal convergence angles of 2.5, 5, 10, 15, 20, 30, and 40 degrees were used. Dynamic stresses were applied to the luted components until the bond failed or the components reached 10(6) load cycles. The data were analyzed using the staircase technique. The relationship between convergence and resistance was approximately linear for all the cements tested. Crowns luted with resin composite cement were more resistant to dynamic lateral loading than those placed using glass-ionomer or zinc-phosphate cements. Crowns luted with zinc-oxide-eugenol cement presented the least resistance to cyclic lateral stresses.
本研究调查了基牙全牙合面聚合角（锥度）与粘固冠在动态加载下的抗力之间的关系。使用氧化锌丁香酚水门汀、磷酸锌水门汀、玻璃离子水门汀或树脂复合水门汀来放置牙冠和基牙代型。采用了2.5度、5度、10度、15度、20度、30度和40度的全牙合面聚合角。对粘结部件施加动态应力，直至粘结失效或部件达到10⁶次加载循环。使用阶梯技术分析数据。对于所有测试的水门汀，聚合角与抗力之间的关系近似呈线性。用树脂复合水门汀粘结的牙冠比用玻璃离子水门汀或磷酸锌水门汀放置的牙冠更能抵抗动态侧向加载。用氧化锌丁香酚水门汀粘结的牙冠对循环侧向应力的抗力最小。
