Effect of ferrule placement on the fracture strength of cyclically loaded bovine teeth restored with cemented cast post-cores and crowns.
This experiment investigated the effect of a ferrule on the strength and fracture resistance of bovine teeth restored with cemented cast post-cores and crowns, compared to crowns alone or to crowns over non-ferrule cores. Thirty restored bovine teeth were subjected to 4 x 1095) cycles from 20 N to 120 N at 10 Hz, followed by fracture testing. Crowns alone were weaker than post restored teeth. There was no difference in fracture strength between ferrule and non ferrule teeth restored with crowns. All of the fractured teeth were subsequently unrestorable.


CONCLUSIONS
Fracture resistance was not enhanced by 2 mm ferrule height.
School of Dentistry and Oral Health, La Trobe University, Bendigo, Victoria 3552, Australia.
Abdul Aziz
AA
Al-Amro
Peter Robert
PR
Wilson
D000818:Animals; D002417:Cattle; D003442:Crowns; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis; D016876:Metal Ceramic Alloys; D011176:Post and Core Technique; D014082:Tooth Fractures / Q000517:prevention & control*; D019231:Tooth Preparation, Prosthodontic / Q000379:methods*
D016876:Metal Ceramic Alloys