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Bond strengths between elastomeric impression materials and disinfected preliminary impressions
J P DeWald1, H Nakajima, L J Bell
1Department of Restorative Sciences, Baylor College of Dentistry, Dallas, Tex.
The Journal of Prosthetic Dentistry
|April 1, 1994
Summary
Disinfecting dental impression materials can weaken bond strengths between layers, impacting clinical techniques. Specific material and disinfectant combinations showed significant bond strength reductions.
Area of Science:
- Dental Materials Science
- Biomaterials
- Adhesion Science
Background:
- Dental impressions are crucial for prosthodontic restorations.
- Disinfection protocols are necessary but may affect material integrity.
- Understanding disinfection effects on impression material bonding is vital for clinical success.
Purpose of the Study:
- To evaluate the impact of disinfection on bond strengths in simulated dental impression techniques.
- To assess bond strength reductions between disinfected putty-wash and wash-wash impression layers.
Main Methods:
- Simulated two-step impression techniques using vinyl polysiloxane and polyether materials.
- Specimens were disinfected using iodine and glutaraldehyde solutions.
- Tensile testing was performed to measure bond strengths between impression layers.
Main Results:
- Significant decreases in bond strengths were observed in both simulated techniques.
- The reduction in bond strength varied depending on the specific impression material and disinfectant used.
- Certain combinations of impression materials and disinfectants showed substantial bond weakening.
Conclusions:
- Disinfection protocols can compromise the integrity of multi-layered dental impressions.
- Clinicians must consider the compatibility of disinfectants with specific impression materials to avoid bond strength issues.
- Further research is needed to identify optimal disinfection strategies that preserve bond strength.