Articles Vol. 67 No. CĐ7-Trường ĐH Y Dược Hải Phòng 06/07/2026

ASSESSMENT OF FINISH LINE PREPARED FOR FULLCOVERAGE CROWN USING INTRAORAL SCANNER MEDIT I700 AND MEDIT LINK SOFTWARE AT HAI PHONG UNIVERSITY HOSPITAL

Dang Tuan Anh1,2,3,4, Pham Thanh Hai1,2,3,4, Nguyen Minh Tuan1,2,3,4
1 Faculty of Dentistry, Hai Phong University of Medicine and Pharmacy
2 Department of OdontoStomatology, Hai Phong Medical University Hospital
3 Khoa Răng Hàm Mặt, Trường Đại học Y Dược Hải Phòng
4 Khoa Răng Hàm Mặt, Bệnh viện Đại học Y Hải Phòng
DOI: 10.52163/yhc.v67iCD7.5578
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Keywords
Finish line, abutment tooth, full-coverage crown, intra-oral scan, Medit i700.
Abstract

Objective: To describe the characteristics of finish lines obtained using an intraoral scanner and to analyze associated factors at Hai Phong University of Medicine and Pharmacy Hospital. Methods: A cross-sectional descriptive study was conducted on 207 abutment teeth from 48 patients requiring crown restorations (October 2025 – March 2026). Impressions were taken using a Medit i700 intraoral scanner and analyzed with Medit Link software. Associated factors included tooth position, jaw location, and clinician’s clinical experience (< 5 years vs. ≥ 5 years). Data were analyzed using Chi-square (χ²) and ANOVA tests (p < 0.05).

Results: The chamfer finish line was most prevalent (58.0%), followed by shoulder (25.6%) and sloped (knife‑edge) finish lines (16.4%). Mean finish line width was 0.83 ± 0.24 mm, and mean emergence angle was 128.5 ± 9.2°. Subgingival finish lines accounted for the highest proportion (35.7%). Finish line position relative to the gingiva was significantly associated with tooth group (p < 0.001) and finish line type (p = 0.042). The choice of finish line type was not significantly associated with clinician experience (p > 0.05).

Conclusion: Scan data revealed that chamfer finish lines and subgingival margins predominated, particularly in anterior teeth.

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