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Accuracy of 2 impression techniques for ITI implants.
1Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey. kivanc.akca@veezy.com
The International Journal of Oral & Maxillofacial Implants
|September 7, 2004
Summary
The snap-on vinyl polysiloxane indirect impression technique offers similar dimensional accuracy to the polyether direct technique for implant-supported prostheses, proving clinically convenient.
Area of Science:
- Dental prosthodontics
- Biomaterials science
- Implant dentistry
Background:
- Accurate casts are crucial for fabricating implant-supported fixed prostheses.
- Impression techniques and materials directly influence cast accuracy.
- Evaluating these factors is essential for predictable clinical outcomes.
Purpose of the Study:
- To compare the accuracy of casts from two impression techniques.
- To evaluate elastomeric impression materials used for implant prostheses.
- To determine the most accurate method for implant-supported fixed prostheses fabrication.
Main Methods:
- A master model with four synOcta ITI implants was used.
- Direct and indirect impression techniques were employed.
- Polyether and vinyl polysiloxane impression materials were tested with custom and stock trays.
Main Results:
- Significant linear dimensional differences were found between impression techniques (P < .05).
- The PE direct technique and PE indirect technique showed differences.
- The PE indirect technique and VPS indirect technique showed angular changes.
Conclusions:
- The snap-on VPS indirect impression technique with a stock tray demonstrated comparable dimensional accuracy to the PE direct technique.
- This technique offers clinical convenience and eliminates repositioning.
- It provides a viable option for accurate implant prosthesis fabrication.