[The comparison of retention of diferent post and core systems].
To study the effects of different post design on retention. 27 simulated tooth roots made of PMMA were divided into three groups, then manufactured the cement-expanded composite screw post-core system (CECSP), cement screw post-core system (CSP) and cast metal post-core system (CMP). The root and post-core system was tensiled by the speed of 10 mm/min on the Instron 4302 and recorded the retention force. It appeared significantly different between retention force of CECSP and CSP and CAM (P < 0.05). As a result, the retention mechanical properties of CECSP was much better than those of cement screw post-core system and cast metal post-core system. Therefore, it is possible to find a new way for restoration of endodontically treated teeth.
Wang
Nianbin
N
Chongqing Beibei TCM Hospital, Chongqing 400700, China.
Chen
Xinmin
X
He
Tao
T
Yang
Yan
Y
Zhang
Guiju
G
Wu
Xiaohong
X
Li
Pingping
P
Niu
Lin
L
D000180:Acrylic Resins; D002484:Cementation; D003188:Composite Resins; D003442:Crowns; D003764:Dental Materials / Q000737:chemistry*; D017268:Dental Prosthesis Retention; D003799:Dental Stress Analysis; D006801:Humans; D011140:Polyurethanes; D011176:Post and Core Technique; D013718:Tensile Strength
D000180:Acrylic Resins; C029012:Composite Dental Resin; D003188:Composite Resins; D003764:Dental Materials; D011140:Polyurethanes