Journal article
Accuracy of digitally fabricated drilling guide to form screw-access channels in cement-retained implant prostheses: A randomized clinical trial
The Journal of prosthetic dentistry, Vol.128(6), pp.1282.e1-1282.e8
12/01/2022
DOI: 10.1016/j.prosdent.2022.07.015
PMID: 36123185
Abstract
Statement of problem. Accurate intraoral preparation of screw channels in cement-retained implant prostheses could be a treatment challenge for tilted or badly positioned implants.Purpose. The purpose of this randomized clinical trial was to evaluate screw channel accuracy for retrieving cement-retained implant prostheses by using a digitally fabricated drilling guide.Material and methods. Twenty-four participants requiring removal of cement-retained implant prostheses were recruited and consecutively assigned to 1 of 2 groups. In the first group, drilling guides were fabricated by using an intraoral scan, computer-aided design (CAD), and 3D printing to facilitate screw channel preparation (guide group). In the second group, screw channel preparation was based on panoramic radiographs without a drilling guide (freehand group). Screw channel accuracy was evaluated with a 3D analysis and subsequently compared with the ideal shape of the screw channel for linear deviation at coronal and apical levels, angular deviation, surface loss deviation, and volume loss deviation. The ideal shape of the screw-access channel was based on the O2.2-mm cylinder image marked along the long axis of the implant. The Mann-Whitney U and Kruskal-Wallis tests were used for statistical analyses (a=.05).Results. The drilling guide group showed higher dimensional accuracy than the freehand group for angular deviation (9.45 degrees versus 15.69 degrees; P=.014) and surface loss deviation (7.40 mm versus 9.53 mm; P=.001), especially when the implant was tilted more than 30 degrees. The deviation values of the screw channels were not significantly different according to implant tilt in either group (P>.05).Conclusions. Digitally fabricated drilling guides for intraoral preparation of screw channels in cement-retained implant prostheses can improve accuracy and provide a less-destructive screw channel. (J Prosthet Dent 2022;128:1282.e1-e8)
Details
- Title: Subtitle
- Accuracy of digitally fabricated drilling guide to form screw-access channels in cement-retained implant prostheses: A randomized clinical trial
- Creators
- Soohyun Bae - Kyungpook National UniversityHang-Nga Mai - Kyungpook Natl Univ, Inst Translat Res Dent, Daegu, South KoreaDu-Hyeong Lee - Kyungpook Natl Univ, Inst Translat Res Dent, Sch Dent, Dept Prosthodont, Daegu, South Korea
- Resource Type
- Journal article
- Publication Details
- The Journal of prosthetic dentistry, Vol.128(6), pp.1282.e1-1282.e8
- DOI
- 10.1016/j.prosdent.2022.07.015
- PMID
- 36123185
- NLM abbreviation
- J Prosthet Dent
- ISSN
- 0022-3913
- eISSN
- 1097-6841
- Publisher
- Elsevier
- Number of pages
- 8
- Grant note
- Korea Medical Device Development Fund - Korea government (the Ministry of Science and ICT); Ministry of Science, ICT & Future Planning, Republic of Korea Ministry of Trade, Industry and Energy (Ministry of Food and Drug Safety); Ministry of Food & Drug Safety (MFDS), Republic of Korea 202011A02 / Ministry of Health & Welfare, Republic of Korea (Ministry of Food and Drug Safety) 2020R1I1A1A01062967 / Bio & Medical Technology Development Program of the National Research Foundation (NRF) - Korean government (MSIT); National Research Foundation of Korea; Ministry of Science & ICT (MSIT), Republic of Korea
- Language
- English
- Date published
- 12/01/2022
- Academic Unit
- Prosthodontics
- Record Identifier
- 9984914021202771
Metrics
1 Record Views