A randomized clinical trial on proximal contacts of posterior composites

Loomans, B.A.C.; Opdam, N.J.M.; Roeters, F.J.M.; Bronkhorst, E.M.; Burgersdijk, R.C.W.; Dörfer, C.E.

doi:10.1016/j.jdent.2005.07.008

« Previous Next »Journal of Dentistry
Volume 34, Issue 4 , Pages 292-297, April 2006

A randomized clinical trial on proximal contacts of posterior composites

B.A.C. Loomans
- Department of Preventive and Restorative Dentistry, Radboud University Nijmegen Medical Centre, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands
- Corresponding author. Tel.: +31 24 3616410; fax: +31 243540265.
N.J.M. Opdam
- Department of Preventive and Restorative Dentistry, Radboud University Nijmegen Medical Centre, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands
F.J.M. Roeters
- Department of Preventive and Restorative Dentistry, Radboud University Nijmegen Medical Centre, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands
E.M. Bronkhorst
- Department of Preventive and Restorative Dentistry, Radboud University Nijmegen Medical Centre, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands
R.C.W. Burgersdijk
- Department of Preventive and Restorative Dentistry, Radboud University Nijmegen Medical Centre, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands
C.E. Dörfer
- Clinic for Conservative Dentistry, School of Medicine, University of Heidelberg, Germany

Received 21 February 2005; received in revised form 12 July 2005; accepted 18 July 2005.

Abstract

Objective

The objective of this study was to investigate clinical changes in proximal contact strength inserting Class II composite resin restorations according to one of three randomly assigned protocols.

Materials and methods

Seventy-one Class II restorations (MO/DO) were placed by two calibrated operators. Restorations were randomly assigned to one of three groups: one using a circumferential and two a sectional matrix system with separation rings. Proximal contacts were measured by one independent observer with a Tooth Pressure Meter immediately before treatment, and directly after finishing the restoration.

Results

Compared to the situation before treatment groups with a sectional matrix system resulted in a statistical significant stronger mean proximal contact strengths (p<0.05), whereas the use of a circumferential matrix system with hand-instrument resulted in a lower proximal contact strength (p<0.05).

Conclusion

Class II posterior composite resin restorations placed with a combination of sectional matrices and separation rings resulted in a stronger proximal contact than when a circumferential matrix system was used.

Keywords: Randomized clinical trial, Class II composite resin restorations, Tooth pressure meter (TPM), Matrix systems, Separation rings