{"title":"Evaluation of the influence of gingival retraction width on the optical impression of the subgingival region using a 3D printed abutment tooth model.","authors":"Takahiro Nishiyama, Kazumichi Wakabayashi, Miyu Tanaka, Shingo Tamiya, Takashi Nakamura, Shoichi Ishigaki","doi":"10.4012/dmj.2024-269","DOIUrl":null,"url":null,"abstract":"<p><p>This study aimed to evaluate the conditions for the finish line position and gingival retraction width that allow for taking optical impressions using three-dimensional (3D) printed models. Taking an impression using an intraoral scanner (IOS) is widely performed in fabricating crown prostheses. Measuring the subgingival finish line using an IOS is difficult; to obtain optical impressions of the subgingival finish line, the gingival retraction has been recommended. However, no study has evaluated the amount of gingival retraction width and the depth of the finish line. In this study, the measurement limits of the subgingival finish line using an IOS and models fabricated by a 3D printer were investigated. The results of this study revealed that TRIOS3 could not measure the finish line when the gingival retraction width was <0.25 mm, and the finish line was located >0.50 mm below the gingival margin.</p>","PeriodicalId":11065,"journal":{"name":"Dental materials journal","volume":" ","pages":"627-633"},"PeriodicalIF":1.8000,"publicationDate":"2025-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Dental materials journal","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.4012/dmj.2024-269","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/10/10 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"DENTISTRY, ORAL SURGERY & MEDICINE","Score":null,"Total":0}
引用次数: 0
Abstract
This study aimed to evaluate the conditions for the finish line position and gingival retraction width that allow for taking optical impressions using three-dimensional (3D) printed models. Taking an impression using an intraoral scanner (IOS) is widely performed in fabricating crown prostheses. Measuring the subgingival finish line using an IOS is difficult; to obtain optical impressions of the subgingival finish line, the gingival retraction has been recommended. However, no study has evaluated the amount of gingival retraction width and the depth of the finish line. In this study, the measurement limits of the subgingival finish line using an IOS and models fabricated by a 3D printer were investigated. The results of this study revealed that TRIOS3 could not measure the finish line when the gingival retraction width was <0.25 mm, and the finish line was located >0.50 mm below the gingival margin.
期刊介绍：
Dental Materials Journal is a peer review journal published by the Japanese Society for Dental Materials and Devises aiming to introduce the progress of the basic and applied sciences in dental materials and biomaterials. The dental materials-related clinical science and instrumental technologies are also within the scope of this journal. The materials dealt include synthetic polymers, ceramics, metals and tissue-derived biomaterials. Forefront dental materials and biomaterials used in developing filed, such as tissue engineering, bioengineering and artificial intelligence, are positively considered for the review as well. Recent acceptance rate of the submitted manuscript in the journal is around 30%.
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