title: [The comparison of retention of diferent post and core systems].
abstract: 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.
authors.affiliation: Chongqing Beibei TCM Hospital, Chongqing 400700, China.
authors.forename: Nianbin
authors.initials: N
authors.lastname: Wang
authors.forename: Xinmin
authors.initials: X
authors.lastname: Chen
authors.forename: Tao
authors.initials: T
authors.lastname: He
authors.forename: Yan
authors.initials: Y
authors.lastname: Yang
authors.forename: Guiju
authors.initials: G
authors.lastname: Zhang
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Wu
authors.forename: Pingping
authors.initials: P
authors.lastname: Li
authors.forename: Lin
authors.initials: L
authors.lastname: Niu
mesh_terms: 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
chemical_list: D000180:Acrylic Resins; C029012:Composite Dental Resin; D003188:Composite Resins; D003764:Dental Materials; D011140:Polyurethanes