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A clinical evaluation of Class II composites placed using a decoupling technique
N H Wilson1, A J Cowan, G Unterbrink
1Department of Restorative Dentistry, University Dental Hospital of Manchester, Higher Cambridge Street, Manchester M15 6FH, UK. Nairn.H.F.Wilson@man.ac.uk
The Journal of Adhesive Dentistry
|April 25, 2001
Summary
This study evaluated a new composite material for Class II restorations, finding it performed well over three years with minimal issues. The decoupling placement technique effectively reduced postoperative sensitivity and improved restoration longevity.
Area of Science:
- Dentistry
- Dental Materials Science
- Restorative Dentistry
Background:
- Class II restorations are common dental procedures.
- Polymerization shrinkage of composite materials can lead to stress at the tooth-restoration interface.
- Minimizing shrinkage stress is crucial for long-term restoration success.
Purpose of the Study:
- To evaluate the three-year clinical performance of Class II restorations using a fine particle hybrid composite.
- To assess the efficacy of a decoupling placement technique in minimizing polymerization shrinkage stresses.
- To determine the impact of this technique on cervical tooth-restoration interface integrity.
Main Methods:
- A practice-based, single-center clinical trial involving Class II restorations (Tetric composite) in molar teeth.
- Utilized a decoupling incremental placement technique with Syntac and Heliobond bonding agents.
- Restorations were assessed at baseline, 18 months, two years, and three to four years using clinical criteria and records.
Main Results:
- Of 43 restorations, 74% were reviewed at 3-4 years; none showed significant deterioration.
- No secondary caries or postoperative sensitivity were recorded in the evaluated restorations.
- Three restorations were lost due to reasons unrelated to material failure.
Conclusions:
- The fine particle hybrid composite and decoupling technique are suitable for moderate-to-large Class II preparations in selected patients.
- The decoupling placement technique appears effective in reducing postoperative sensitivity and enhancing restoration performance.
- Further multicenter randomized controlled trials are recommended to validate these findings in everyday practice.