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

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

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


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 chisquare 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 serviceable (combined Alfa and Bravo scores) 10 years after placement. Longevity was significantly influenced by cavity type.

Original languageEnglish
Pages (from-to)240-246
Number of pages7
JournalQuintessence International
Issue number5
Publication statusPublished - Jan 1 2007
Externally publishedYes


  • Acid etching
  • Clinical evaluation
  • Dentin bonding system
  • Longevity
  • Resin composite
  • Retrospective study

ASJC Scopus subject areas

  • Dentistry(all)


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