Clinical performance and marginal adaptation of class II direct and semidirect composite restorations over 3.5 years in vivo.
OBJECTIVE
The study evaluated the clinical performance and marginal adaptation of direct and semi-direct class II composite restorations in a split-mouth design over 3.5 years.


METHODS
44 upper posterior teeth in 11 adults with primary carious lesions were treated with 22 direct and 22 semi-direct restorations. Conventional cavities were prepared for both types of restorations. A fine fine hybrid composite (APH) and a multifunctional adhesive system (Prisma universal bond 3) were used for all restorations. The incremental "3-sited light curing" technique was applied to direct restorations. Semi-direct inlays were prefabricated on silicone casts and post-cured using light and heat. Clinical performance was evaluated using modified USPHS parameters, while marginal adaptation was judged on replicas, using SEM and a standardized evaluation technique.


RESULTS
Clinical results after 3.5 years revealed a 100% retention rate with no fractures, sensitivity or recurrent caries for both types of restorations. SEM-evaluation of the occlusal margins showed at the tooth-restoration interface relatively low rates of marginal openings over the observation period (4-8%). Marginal restoration fractures ranged between 1 and 2%, marginal tooth fractures between 3 and 9%. Differences between the restorative techniques and after the different time observation periods were not statistically significant. Proportions of marginal fractures and openings at the restoration-luting composite interface were less than 10% after 3.5 years.


CONCLUSIONS
The results indicated no significant differences for direct and semi-direct fine hybrid composite restorations in medium size cavities in posterior teeth with respect to clinical performance and marginal adaptation over 3.5 years.
Spreafico
Roberto C
RC
Department of Cariology and Endodontology, School of Dentistry, University of Geneva, 19 Rue Barthélémy Menn, 1205 Geneva, Switzerland.
Krejci
Ivo
I
Dietschi
Didier
D
D000180:Acrylic Resins / Q000737:chemistry*; D000293:Adolescent; D000328:Adult; D003188:Composite Resins / Q000737:chemistry*; D003731:Dental Caries / Q000628:therapy*; D018772:Dental Marginal Adaptation; D019232:Dental Restoration Failure; D005260:Female; D006801:Humans; D007284:Inlays; D008137:Longitudinal Studies; D008297:Male; D011140:Polyurethanes / Q000737:chemistry*; D011446:Prospective Studies; D018709:Statistics, Nonparametric
D000180:Acrylic Resins; C029012:Composite Dental Resin; D003188:Composite Resins; D011140:Polyurethanes