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Marginal adaptation of a sintered ceramic inlay system before and after cementation
D Gemalmaz1, M Ozcan, A B Yoruç
1Faculty of Dentistry, University of Marmara, Istanbul, Turkey.
Journal of Oral Rehabilitation
|November 14, 1997
Summary
This study evaluated porcelain inlay marginal integrity using a sintered inlay technique. Results show that while occlusal margins were initially better adapted, both occlusal and approximal margins worsened after cementation.
Area of Science:
- Dental Materials Science
- Restorative Dentistry
Background:
- Long-term clinical success of porcelain inlays is influenced by marginal adaptation.
- Evaluating marginal integrity is crucial for understanding inlay performance.
Purpose of the Study:
- To assess the marginal integrity of a sintered porcelain inlay technique (Ducera).
- To compare inlay adaptation before and after cementation.
Main Methods:
- Porcelain inlays fabricated using a sintered technique on human mandibular molars.
- Microscopic evaluation of marginal adaptation using a replica technique.
- Cementation with dual-cured hybrid composite luting material and subsequent sectioning for gap measurement.
Main Results:
- Before cementation, occlusal margins (71.83 ± 8.93 µm) showed significantly better adaptation than approximal margins (105.6 ± 39.33 µm).
- After cementation, marginal gaps increased at both occlusal (6.94 µm) and approximal (23.25 µm) margins.
- Excess luting material was observed post-cementation, increasing exposed cement width.
Conclusions:
- The sintered inlay technique demonstrated varying marginal adaptation between occlusal and approximal surfaces.
- Cementation process negatively impacts marginal integrity, with greater deterioration at approximal margins.
- Further refinement of cementation protocols may be needed to optimize long-term clinical performance.