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Comparison of occlusal contacts in maximum intercuspation for two impression techniques
M H Parker1, S M Cameron, J C Hughbanks
1U.S. Army Dental Activity, Fort Gordon, Ga., USA.
The Journal of Prosthetic Dentistry
|September 23, 1997
Summary
The quadrant dual-arch impression technique provides significantly more accurate mounted casts for maximum intercuspation than traditional full-arch methods. This improves the precision of fixed prostheses by reducing occlusal interferences.
Area of Science:
- Dental materials science
- Prosthodontics
- Biomaterials
Background:
- Occlusal interferences in maximum intercuspation are common issues with fixed prostheses.
- Accurate mounting of casts is crucial for successful prosthesis fabrication.
Purpose of the Study:
- To compare the accuracy of interocclusal relationships in maximum intercuspation.
- To evaluate casts mounted using quadrant dual-arch versus conventional full-arch impression techniques.
Main Methods:
- Evaluated accuracy of interocclusal records from mounted casts versus intraoral records.
- Utilized various impression materials for full-arch techniques (irreversible hydrocolloid, reversible hydrocolloid, polysulfide, polyether, polyvinyl siloxane).
- Employed rigid and light-body polyvinyl siloxane for quadrant dual-arch impressions.
Main Results:
- A statistically significant difference (p = 0.0017) was found in median values among treatment groups.
- Quadrant dual-arch records showed significantly less average error (5 +/- 5 microns) compared to full-arch records (72 +/- 33 microns).
- No significant differences were found among the various full-arch impression techniques.
Conclusions:
- The quadrant dual-arch impression technique yields superior accuracy for maximal intercuspal relationships on mounted casts.
- This technique offers a more precise method for achieving accurate occlusal relationships in prosthodontics.