Tensile bond strength between custom tray and elastomeric impression material.

Current dental practices require stable adhesion between impression trays and materials. While prior research has shown that tray surface preparation influences bonding, no prior work had resolved how specific preparation methods interact with different impression materials. This gap motivated the need to evaluate how tray storage time, adhesive drying time, and surface roughness affect bond strength. Established knowledge includes the role of surface roughness in enhancing adhesion, but uncertainty remained about how this applies to various impression materials. No prior work had resolved the impact of drying time on different adhesive systems. This paper's contribution lies in systematically testing these variables across multiple materials and tray conditions. The study addresses a practical need in dental laboratories to optimize tray preparation for different impression materials. It builds on prior work but introduces new variables specific to tray storage and drying time. This approach allows for a more precise understanding of adhesive behavior under controlled conditions.

The study aimed to determine optimal adhesive strength between impression trays and materials. It focused on evaluating how tray storage time, adhesive drying time, and surface roughness affect bond strength. The specific problem addressed was the lack of standardized guidelines for tray preparation depending on material type. Motivation came from the need to improve consistency in dental impressions. The study sought to clarify how different variables influence adhesion across various impression materials. It aimed to provide a framework for selecting appropriate tray preparation methods. The goal was to identify which factors most significantly impact bond strength. This work sought to bridge a practical gap in dental material application.

Impression materials were tested between autopolymerizing resin columns. Tensile bond strength was measured as a function of tray storage time, adhesive drying time, and surface roughness. Variables included storage times of 1 to 10 days and drying times of 0 to 15 minutes. Surface roughness was evaluated using air abrasion, bur-produced roughness, and no treatment. The study design involved controlled testing of each variable across multiple materials. No prior work had resolved the comparative effects of these variables. The approach allowed for isolation of each factor's impact on bond strength. The study used a systematic method to assess interactions between preparation techniques and materials.

Tensile bond strength was not affected by tray storage time over 10 days. Drying time had significant effects on Reprosil and Exaimplant but not on Imprint II or Impregum. Vinyl polysiloxane showed highest strength with bur-produced roughness (P<0.05). Polyether had lowest strength with bur-produced roughness (P<0.05). Air abrasion yielded lower strength than bur-produced roughness for vinyl polysiloxane. No treatment resulted in the lowest bond strength for polyether. These findings suggest material-specific responses to surface preparation. The results highlight the importance of matching tray preparation to material type.

The study concluded that tray surface treatment should be adapted to the impression material used. Vinyl polysiloxane benefits most from bur-produced roughness (P<0.05). Polyether achieves lowest strength with the same treatment (P<0.05). Drying time affects Reprosil and Exaimplant but not other materials. These findings suggest that preparation methods must be material-specific. The authors propose that optimal bond strength requires tailored tray preparation. No prior work had resolved these material-specific effects. The study provides a basis for selecting appropriate tray preparation techniques.