Seven-year clinical evaluation of indirect restorations made of the Estenia composite

Hideaki Shiono, DDS, PhD,(a) Hiroyasu Koizumi, DDS, PhD,(a),(b) Masakazu Hirata, DDS,(a) Michiya Ayano, DDS,(a) Daisuke Nakayama, DDS,(a) and Hideo Matsumura, DDS, PhD,(a),(b)

(a)Department of Fixed Prosthodontics, and (b)Division of Advanced Dental Treatment, Dental Research Center, Nihon University School of Dentistry, Tokyo, Japan

Purpose: The aim of this study was to evaluate the clinical performance of tooth-colored crown restorations made of a highly loaded indirect composite material.
Materials and Methods: A total of 17 restorations made of the Estenia indirect composite were clinically evaluated on the basis of the modified USPHS criteria. Color match, marginal integrity, surface texture, wear of restoration as well as antagonist, recurrent dental caries, fracture/detachment, and gingivitis around the abutments were examined. The observation period varied from 50 to 125 months with an average of 87.5 months.
Results: All restorations were judged as Alfa for all categories at baseline. After an average observation period of 87.5 months, the following cases were judged as Bravo; eight for surface texture, one for wear, five for wear of the metallic antagonists, and one for gingival inflammation. Fracture of the restoration was detected in one case. Problems associated with color match, marginal integrity, wear of enamel antagonists, and recurrent dental caries were not observed in any patients.
Conclusion: Within the limitation of current evaluation, it can be concluded that the expected service period of the indirect restorations made of the Estenia composite is five years or more.(Int Chin J Dent 2009; 9: 39-43.)

Key Words: clinical evaluation, composite, indirect restoration.