Retention of overdenture posts cemented with self-adhesive resin cements.
This study investigated the effects of two self-adhesive resin cements on the retention of overdenture anchor posts after 30 days of aging in water. Forty caries-free human canines were randomly assigned to four test groups. Uni-Anchor posts were cemented to specimens in groups A and B with Breeze and Maxcem self-adhesive resin cements, respectively. In groups C and D, Fuji glass-ionomer cement and Fleck's zinc phosphate cement were used, respectively. Specimens were stored in distilled water at 37 degrees C for 30 days. Each specimen was loaded in tension in an Instron universal testing machine. The maximum force required to dislodge each post was recorded. Means and standard deviations (SDs) were calculated and data were statistically analyzed with analysis of variance (ANOVA). Means and SDs were 706.5 +/- 204.6 N for Breeze, 585.1 +/- 213.5 N for Maxcem, 449.2 +/- 181.1 N for Fuji, and 330.4 +/- 120.6 N for Fleck's. ANOVA revealed significant differences among the means (P < .0003). Adhesive failure was observed with all groups except group A, in which eight specimens underwent a cohesive fracture of the dentin. Breeze cement (group A) resulted in the highest retention force and most frequent cohesive failure and thus would be expected to clinically perform in a superior manner.
Elsayed
Mohamed Ezzat
ME
Department of Removable Prosthodontics, Faculty of Dentistry, Suez Canal University, Ismailia, Egypt.
El-Mowafy
Omar
O
Fenton
Aaron
A
D000268:Adhesiveness; D002484:Cementation / Q000379:methods; D017268:Dental Prosthesis Retention; D003799:Dental Stress Analysis / Q000295:instrumentation; D003804:Dentin / Q000293:injuries; D003781:Denture Retention / Q000295:instrumentation; D003828:Denture, Overlay; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D011176:Post and Core Technique / Q000295:instrumentation*; D019279:Resin Cements / Q000737:chemistry*; D013314:Stress, Mechanical; D013696:Temperature; D013718:Tensile Strength; D013997:Time Factors; D014867:Water / Q000737:chemistry; D015036:Zinc Phosphate Cement / Q000737:chemistry
D005899:Glass Ionomer Cements; C515955:Maxcem; D019279:Resin Cements; C584659:breeze cement; D014867:Water; D015036:Zinc Phosphate Cement