Cementation of vented crowns with low deformation

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Prosthodontics

Background:

• Accurate seating of dental restorations is crucial for long-term success.
• Cementation forces and material properties can influence crown deformation and fit.
• Understanding these factors is essential for optimizing clinical procedures.

Purpose of the Study:

• To investigate the impact of seating forces, cements, and venting on crown deformation.
• To evaluate the effect of these variables on seating discrepancy in dental restorations.
• To identify optimal conditions for minimizing deformation and achieving accurate crown seating.

Main Methods:

• Crown deformation was measured using a circumferential strain gauge.
• Experiments involved varying seating forces (3, 10, 25 N), cements (Phosphacap, Ketac-cem Applicap, Fuji-cap I), and venting.
• A consistent 40-micron cement space was maintained throughout the study.

Main Results:

• Venting increased deformation but reduced seating discrepancy.
• Increased seating force led to greater deformation and reduced discrepancy.
• Ketac-cem Applicap exhibited the lowest seating discrepancy with moderate deformation.

Conclusions:

• A combination of venting, low forces (10 N), and Ketac-cem Applicap minimizes both crown deformation and marginal discrepancy.
• Venting can reduce seating discrepancy to acceptable levels even with higher forces (25 N) when using Phosphacap.
• Optimizing cementation parameters is key to achieving precise fit and reducing clinical complications.