3D evaluation of composite resin restoration at practical training using swept-source optical coherence tomography (SS-OCT)

Yasushi Shimada, Alireza Sadr, Amir Nazari, Hisaichi Nakagawa, Masayuki Otsuki, Junji Tagami, Yasunori Sumi

Research output: Contribution to journalArticle

19 Citations (Scopus)


Internal adaptation of restorations to the cavity wall is one of the important topics in clinical dentistry. The purpose of this study was to investigate the possibility to utilize the non-invasive tomographic imaging system for teaching the importance of cavity adaptation at dental school pre-clinical training. Swept-source optical coherence tomography (SS-OCT) was used for detection of marginal and internal defects in the composite resin restorations as an educational device. Class 1 and Class 2 composite restorations to melamine resin molar tooth were assigned to the students and prepared during the skill test, and SS-OCT imaging was performed to evaluate students' works. SS-OCT could detect the internal gaps and voids within the restorations in tomography images synthesized based on the backscatter signal from within the restoration. It is suggested that the SS-OCT is promising diagnostic modality, as well as educational imaging device for the detection of internal gaps in adhesive restorations.

Original languageEnglish
Pages (from-to)409-417
Number of pages9
JournalDental materials journal
Issue number3
Publication statusPublished - Jun 11 2012
Externally publishedYes



  • 3D evaluation
  • Composite resin
  • Internal adaptation
  • Practical training
  • SS-OCT

ASJC Scopus subject areas

  • Ceramics and Composites
  • Dentistry(all)

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