Three-year clinical evaluation of posterior inlay restorations made of three different composite materials

Amal Abd El-Samad Sakrana, DDS, PhD,(a) Hiroyasu Koizumi, DDS, PhD,(b) Hideo Matsumura, DDS, PhD,(b) Naomi Tanoue, DDS, PhD,(c) and Ossama Badie Abouelatta, BSc, MSc, PhD(d)

(a)Department of Crown and Bridge Prosthodontics, Mansoura University Faculty of Dentistry, Mansoura, Egypt, (b)Department of Crown and Bridge Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan, (c)Department of General Dentistry, Nagasaki University Hospital of Medicine and Dentistry, Nagasaki, Japan, and (d)Department of Production Engineering and Mechanical Design, Mansoura University Faculty of Engineering, Mansoura, Egypt.

Purpose: The purpose of this study was to evaluate clinical performance of posterior inlay restorations made of different three composite materials.
Materials and Methods: A total of 156 posterior cavities were restored with inlay restorations made of different brands of composite (Filtek Supreme, Z250, and Pertac II, n=52 each). These teeth were restored according to the universal methodology of inlay restorations. Surface texture, anatomic form, marginal integrity, discoloration, occlusion, and pulp sensitivity were evaluated on the basis of the modified United States Public Health Service (USPHS) criteria immediately after insertion and after three years. The data were analyzed by Kruskal-Wallis test.
Results: Restorations made of the Filtek Supreme composite overall exhibited better clinical performance than those made of the other two composites especially after 3-year service period.
Conclusion: It can be concluded that the Filtek Supreme nanocomposite is clinically improved and reliable material for use as indirect composite restoratives. (Int Chin J Dent 2005; 5: 43-46.)

Key Words: hybrid composite, indirect composite, nanocomposite.