Strain gauges's analysis on implant-retained prosthesis' cast accuracy

Area of Science:

• Dental prosthodontics
• Biomaterials engineering
• Implant dentistry

Background:

• Accurate casts are crucial for successful implant prosthesis rehabilitation.
• Proper casting minimizes strain on implants and improves structural integrity.

Purpose of the Study:

• To assess the precision of four distinct mold filling techniques.
• To validate a precise method for evaluating these techniques.

Main Methods:

• Forty casts were created using a metallic matrix for three-unit implant-retained prostheses.
• Four techniques were tested: single-portion, two-step, latex cylinder, and analog joining.
• Marginal misfit and strain forces were evaluated using optical microscopy and strain gauges.

Main Results:

• No statistically significant difference was found in misfit values across the four techniques (P = 0.979).
• Significant differences in strain were observed between the latex cylinder and analog joining techniques (P = 0.027).

Conclusions:

• The analog joining technique demonstrated comparable efficiency to conventional methods.
• Strain gauge methodology proved accurate for evaluating cast distortion and strain.
• No correlation was established between strain and marginal misfit.