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Restoring cervical lesions with flexible composites.

M Peumans¹, J De Munck, K L Van Landuyt

¹Department of Conservative Dentistry, School of Dentistry, Oral Pathology and Maxillo-facial Surgery, Catholic University of Leuven, Kapucijnenvoer 7, B-3000 Leuven, Belgium. marleen.peumans@med.kuleuven.ac.be

Dental Materials : Official Publication of the Academy of Dental Materials

|September 5, 2006

Summary

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This study found that composite flexibility does not impact the longevity of cervical restorations over seven years. Dental composite stiffness did not significantly affect clinical performance or failure rates in this trial.

Area of Science:

Restorative Dentistry
Dental Materials Science
Clinical Trials

Background:

Tooth cervix flexure can accelerate cervical restoration dislodgement.
Composite material properties, specifically flexibility, are hypothesized to influence restoration longevity.

Purpose of the Study:

To evaluate the hypothesis that increased composite flexibility enhances resistance to tooth flexure stress.
To compare the clinical performance of composites with contrasting stiffness in non-carious cervical lesions.

Main Methods:

A 7-year randomized controlled clinical trial involving 142 non-carious cervical lesions.
Restorations were placed using three experimental groups combining different etch-and-rinse adhesives and composites of varying stiffness (stiff micro-hybrid, flexible micro-filled).

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Main Results:

No statistically significant differences in clinical performance were observed between adhesives or composites.
Failure rates varied, with some restorations requiring repair or replacement due to loss of retention, marginal discoloration, or margin defects.

Conclusions:

All tested adhesive/composite combinations demonstrated good and reliable clinical performance over 7 years.
Composite stiffness was found to have no significant effect on the clinical longevity of cervical composite restorations.