Roland Frankenberger1, Christian Reinelt, Norbert Krämer. 1. Department of Operative Dentistry and Endodontics, Medical Center for Dentistry, University Medical Center Giessen and Marburg, Campus Marburg, Georg-Voigt-Str 3, 35039, Marburg, Germany, frankbg@med.uni-marburg.de.
Abstract
OBJECTIVE: In a controlled prospective split-mouth study, clinical behavior of two different resin composites in extended class II cavities was observed over 8 years. MATERIALS AND METHODS: Thirty patients received 68 direct resin composite restorations (Solobond M/Grandio, Voco--n = 36; Syntac/Tetric Ceram, Ivoclar Vivadent--n = 32) by one dentist in a private practice. Thirty-five percent of cavities revealed no enamel at the bottom of the proximal box, 48% of cavities provided <0.5 mm remaining proximal enamel width. Restorations were examined according to modified US Public Health Service criteria at baseline, after 6 months, and 1, 2, 4, 6, and 8 years. RESULTS: All patients attended the 8-year recall. The overall success rate of all restorations was 98.5% (Kaplan-Meier survival algorithm). One Grandio restoration was lost due to bulk fracture. One Tetric Ceram restoration suffered drop out due to cusp fracture having been not related to the restoration itself. Neither restorative materials nor localization of the restorations had a significant influence on any criterion except color (darker for Grandio). Restorations in molars performed inferior compared with premolars regarding marginal integrity (4 years), restoration integrity (6, 12, 24, 48, and 96 months), and tooth integrity (12, 48, 72, and 96 months). Irrespective of the resin composite used, significant changes over time were found for all criteria evaluated in clinical examinations. Beyond the 4-year recall, marginal staining increased. Both phenomena were found earlier in molars compared with premolars. Tooth integrity significantly deteriorated because of increasing enamel cracks and chippings over time. CONCLUSIONS: Both materials performed satisfactorily over the 8-year observation period. Due to the extension of the restorations, wear was clearly visible after 8 years of clinical service. CLINICAL RELEVANCE: Hybrid and nanohybrid resin composites show an acceptable clinical performance after 8 years of service.
OBJECTIVE: In a controlled prospective split-mouth study, clinical behavior of two different resin composites in extended class II cavities was observed over 8 years. MATERIALS AND METHODS: Thirty patients received 68 direct resin composite restorations (Solobond M/Grandio, Voco--n = 36; Syntac/Tetric Ceram, Ivoclar Vivadent--n = 32) by one dentist in a private practice. Thirty-five percent of cavities revealed no enamel at the bottom of the proximal box, 48% of cavities provided <0.5 mm remaining proximal enamel width. Restorations were examined according to modified US Public Health Service criteria at baseline, after 6 months, and 1, 2, 4, 6, and 8 years. RESULTS: All patients attended the 8-year recall. The overall success rate of all restorations was 98.5% (Kaplan-Meier survival algorithm). One Grandio restoration was lost due to bulk fracture. One Tetric Ceram restoration suffered drop out due to cusp fracture having been not related to the restoration itself. Neither restorative materials nor localization of the restorations had a significant influence on any criterion except color (darker for Grandio). Restorations in molars performed inferior compared with premolars regarding marginal integrity (4 years), restoration integrity (6, 12, 24, 48, and 96 months), and tooth integrity (12, 48, 72, and 96 months). Irrespective of the resin composite used, significant changes over time were found for all criteria evaluated in clinical examinations. Beyond the 4-year recall, marginal staining increased. Both phenomena were found earlier in molars compared with premolars. Tooth integrity significantly deteriorated because of increasing enamel cracks and chippings over time. CONCLUSIONS: Both materials performed satisfactorily over the 8-year observation period. Due to the extension of the restorations, wear was clearly visible after 8 years of clinical service. CLINICAL RELEVANCE: Hybrid and nanohybrid resin composites show an acceptable clinical performance after 8 years of service.
Authors: Norbert Krämer; Mandy Möhwald; Susanne Lücker; Eugen Domann; José I Zorzin; Martin Rosentritt; Roland Frankenberger Journal: Clin Oral Investig Date: 2015-01-24 Impact factor: 3.573
Authors: Akimasa Tsujimoto; Wayne W Barkmeier; Nicholas G Fischer; Kie Nojiri; Yuko Nagura; Toshiki Takamizawa; Mark A Latta; Masashi Miazaki Journal: Jpn Dent Sci Rev Date: 2017-12-11