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Retention of cemented implant-supported restorations
D K Kent1, S Koka, M L Froeschle
1Department of Dental Practice Management, University of Nebraska Medical Center College of Dentistry, Lincoln 68583-0740, USA.
Summary
Zinc phosphate cement demonstrated superior cement failure loads for gold cylinders on titanium abutments compared to Tempbond and Tempbond NE. Filling the access opening did not significantly impact failure loads for zinc phosphate or Tempbond NE.
Area of Science:
- Dental materials science
- Biomaterials engineering
- Prosthodontics
Background:
- Dental cement selection is critical for the longevity of indirect restorations.
- Titanium abutments are commonly used in implant dentistry due to their biocompatibility and strength.
- Understanding cement failure loads is essential for predicting clinical performance.
Purpose of the Study:
- To compare the cement failure loads (CFLs) of gold cylinders luted to CeraOne titanium abutments using zinc phosphate, Tempbond NE, or Tempbond luting agents.
- To evaluate the effect of filling the gold screw access opening on CFLs.
Main Methods:
- Gold cylinders were luted to 5-mm CeraOne titanium abutments with three different luting agents.
- Specimens were stored in controlled humidity and temperature for 24 hours.
- Uniaxial tensile force was applied to determine the cement failure load (CFL) in kilograms.
Main Results:
- Zinc phosphate exhibited significantly higher mean CFLs compared to Tempbond and Tempbond NE (p < .05).
- Filling the access opening did not significantly affect CFLs for zinc phosphate and Tempbond NE.
- Tempbond with a filled access opening showed significantly higher CFLs than with an unfilled opening.
Conclusions:
- Zinc phosphate luting cement significantly enhances the cement failure load of gold cylinders on titanium abutments after 24 hours.
- Filling the access opening only increased CFLs when Tempbond was used; it had no significant effect with Tempbond NE or zinc phosphate.