Cohen B I, Deutsch A S, Condos S, Musikant B L
Essential Dental Laboratories, South Hackensack, N.J.
J Prosthet Dent. 1992 Jul;68(1):63-8. doi: 10.1016/0022-3913(92)90287-k.
The retention of the crown to the core substructure is of great importance for a successful restoration. The aim of this study was to compare the retentive values of the Flexi-Cast post and its sleeve crown/core complex with that of a crown cemented to a conventional cast post. Forty single-rooted teeth divided equally into four groups were used. Flexi-Cast crown and cores were cemented to Flexi-Cast posts in groups 1 through 3. Group 4, the control group, comprised crowns cemented to conventional cast cores. Groups 1 through 4 had retentive values of 126.2, 135.5, 185.0, and 79.3 lb, respectively. Statistically, the increase in retention for all sizes of the Flexi-Cast crown and cores when compared with the control cast post and crown was found to be significant (p less than or equal to 0.0001).
对于成功修复而言，牙冠与核子结构的固位至关重要。本研究的目的是比较Flexi-Cast桩及其套筒冠/核复合体与粘结在传统铸造桩上的牙冠的固位值。使用40颗单根牙，平均分为四组。第1至3组中，Flexi-Cast冠和核粘结在Flexi-Cast桩上。第4组为对照组，包括粘结在传统铸造核上的牙冠。第1至4组的固位值分别为126.2、135.5、185.0和79.3磅。统计学上，与对照铸造桩和牙冠相比，所有尺寸的Flexi-Cast冠和核的固位增加均具有显著性（p小于或等于0.0001）。
