A Comparitive Study on the Tensile Bond Strength of Conventional Denture Base Resin to Cross Linked Acrylic Tooth using two Different Curing Cycles - an invitro Study
Raza Mohamed1, Noufal P. K2, Deepa Shenoy3, P. Sesha Reddy4, ACU. Varma4 and Ashish R. Jain51Department of Prosthodontics, Pariyaram dental college, Pariyaram, Kannur(Dt), kerala, India.
2Department of Prosthodontics, Al Azhar Dental College, Perumpillichira, Thodupuzha, Kerela, India.
3Department of Prosthodontics, Asan Memorial Dental College and Hospitals,Chennai, India.
4Department of Prosthodontics, Goverment Dental College, RIMS, Putlampali, Kadapa, India.
5Department of Prosthodontics, Saveetha Dental College and Hospitals,Chennai, India.
Corresponding Author E-mail: dr.ashishjain_r@yahoo.com
Abstract: The fractures and debonding of acrylic resin teeth from acrylic denture base is a common clinical problem. This bond may be further enhanced by removing the glossy ridge lap surfaces of these teeth, or by providing mechanical retention grooves.The purpose of this study was to compare the tensile bond strength of a conventional denture base resin to a cross-linked acrylic teeth processed under two different curing cycles, having three variables in each group. Fourty eight specimens were prepared for tensile bond strength testing using Instron Universal testing machine under two different curing cycles. Group I: Glossy surface of the ridge-lap area of the acrylic teeth unmodified, Group II: Glossy surface of the ridge-lap area of the acrylic teeth abraded, Group III: Preparation of retentive grooves on the lap area of the acrylic teeth.The tensile bond strength of specimens cured using slow curing cycle gave a better result when compared to the short Curing cycle and the slow curing cycle with retentive grooves was found to have the highest tensile bond strength among the other variables.Overall, higher bond strength of denture base resin to the denture teeth tested were obtained with the slow curing cycle rather than short curing cycle. The bond between the acrylic teeth and denture base was improved significantly by the preparation of retentive grooves on the ridge lap area compared to the ridge lap area abraded and when left untreated. The strongest bond was with the specimens processed under the slow curing cycle with retentive grooves placed on the ridge lap area of the tooth.
Keywords: Artificial Teeth; Bond Strength; Curing; Denture Base Back to TOC