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Quintessence Publishing: Journals: QI
Quintessence International

Edited by Eli Eliav

ISSN 0033-6572 (print) • ISSN 1936-7163 (online)

May 2007
Volume 38 , Issue 5

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Retrospective study of the 10-year clinical performance of direct resin composite restorations placed with the acid-etch technique

Toru Nikaido, DDS, PhD / Tsunehiko Takada, DDS, PhD / Yuichi Kitasako, DDS, PhD / Miwako Ogata, DDS, PhD / Yasushi Shimada, DDS, PhD / Takako Yoshikawa, DDS, PhD / Masatoshi Nakajima, DDS, PhD / Masayuki Otsuki, DDS, PhD / Junji Tagami, DDS, PhD / Michael F. Burrow, DDS, PhD

PMID: 17568828

Objective: To assess the 10-year clinical performance of resin composite restorations placed using the acid-etch technique. Method and Materials: Clinical evaluation of 58 resin composite restorations was performed by 9 operators of the Operative Dentistry Clinic of the Dental Hospital, Tokyo Medical and Dental University. Conservative preparations had been made and a total-etch adhesive system used for the resin composite restorations, which were placed in 1992 in the Operative Dentistry Clinic. Restorations were scored using the following scale: Alfa—good; Bravo—clinically acceptable; Charlie—clinically unacceptable; Delta—already replaced. The scores were analyzed using the chi-square test and the expected cell frequency (P = .05). Results: The 58 restorations from 26 patients (13 men and 13 women) were identified in the treatment records and analyzed. Twenty-two restorations (37.9%) presented Alfa scores and 17 restorations (29.3%) were clinically acceptable (Bravo scores), while 3 restorations (5.2%) received Charlie scores and 16 restorations (27.6%) had already been replaced (Delta scores). The descending ranking of longevity by restoration type was Class 5 > Class 3 > Class 2 > Class 1 > Class 4 (P = .05). Conclusions: Of the restorations evaluated, 67.2% were ser-viceable (combined Alfa and Bravo scores) 10 years after placement. Longevity was significantly influenced by cavity type (Quintessence Int 2007;38:439.e240–246)

Key words: acid etching, clinical evaluation, dentin bonding system, longevity, resin composite, retrospective study

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