Comparison of changes in vertical dimension between compression and injection molded complete dentures

Area of Science:

• Dental prosthetics
• Materials science in dentistry

Background:

• Conventional compression molding is a widely used technique for complete denture fabrication.
• Processing errors, such as changes in vertical dimension, can occur during conventional denture processing.
• The SR-Ivocap injection system offers an alternative processing method for complete dentures.

Purpose of the Study:

• To compare the accuracy of vertical dimension maintenance between conventional compression molding and the SR-Ivocap injection system for complete dentures.
• To evaluate the impact of processing methods on dimensional stability in complete denture fabrication.

Main Methods:

• Thirty patients received complete dentures, with 15 processed via conventional compression molding and 15 via the SR-Ivocap injection system.
• Changes in vertical dimension were measured using a dial indicator at the incisal guide pin before and after processing.
• Statistical analysis was performed using t-tests to determine significant differences between the two methods.

Main Results:

• A highly significant difference in vertical dimension changes was observed between the two processing methods.
• Conventional compression molding showed processing changes consistent with previous studies.
• The SR-Ivocap injection system resulted in minimal to no change in vertical dimension (pin opening).

Conclusions:

• The SR-Ivocap injection system demonstrates superior accuracy in maintaining vertical dimension during complete denture processing compared to conventional methods.
• The minimal dimensional changes associated with the injection system suggest that laboratory remount procedures may be rendered unnecessary, potentially streamlining the fabrication process.