Comparison of the Internal and Marginal Adaptation of Implant-Supported Restorations on Titanium Base Using Various...

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Prosthodontics

Background:

• The fit of dental restorations to titanium base (TiBase) abutments is critical for implant and prosthetic success.
• Material choice and fabrication methods significantly influence restoration adaptation.
• CAD-CAM (Computer-Aided Design/Computer-Aided Manufacturing) technology is widely used for implant-supported crowns.

Purpose of the Study:

• To compare the internal and marginal fit of CAD-CAM milled restorations using doped graphene PMMA, single-density zirconia, and dual-density zirconia.
• To evaluate the adaptation of these materials to titanium base abutments for single implant-supported crowns.

Main Methods:

• An in vitro study utilizing a digital method based on the silicone replica technique.
• Fabrication of implant-supported single crowns from three different milled materials.
• Digital alignment of silicone replicas to titanium bases to measure interfacial space at basal, middle, and superior planes.

Main Results:

• Doped graphene PMMA exhibited the best overall adaptation (0.06 ± 0.02 mm), outperforming single-density zirconia (0.09 ± 0.03 mm) and dual-density zirconia (0.1 ± 0.03 mm).
• No significant differences in internal fit (middle and superior planes) were found among the materials (p > 0.05).
• Doped graphene PMMA showed statistically superior marginal fit compared to both zirconia types (p < 0.05), with no difference between single and dual-density zirconia.

Conclusions:

• Doped graphene PMMA offers superior marginal adaptation for implant-supported single crowns compared to zirconia.
• Material selection impacts the marginal fit of CAD-CAM restorations on TiBase abutments.
• Further research may explore long-term clinical performance and other properties of these materials.