Accuracy of marginal adaptation of posterior fixed dental prosthesis made from digital impression technique: A systematic review

Abstract

Aim: The aim of this systematic review was to investigate the marginal adaptation of three or four unit fixed dental prosthesis (FDP) fabricated with digital impression techniques to those fabricated using any other impression technique. Settings and Design: Database/electronic searches were conducted till August 2019 in PUBMED-MEDLINE, SCOPUS, and Cochrane library. To identify published articles, multiple keywords were used to develop a search strategy in various combinations. Manual searching of articles was also done. Clinicaltrials.gov.in WHOICTRP and CTRI websites were also searched. Two independent reviewers (TP and VK) assessed eligibility for inclusion, extracted data, and assessed quality using the Cochrane risk of bias tool. Results: Database search identified 497 citations and four citations through manual search. After removing duplicates and going through abstracts, 23 articles were perused for full-text screening. Two articles met the inclusion criteria; characteristics were described qualitatively, with two studies having overall low risk of bias. Conclusions: Marginal adaptation of FDPs fabricated using the digital and conventional impressions method was within the clinically acceptable limits. However, more robust clinical trials need to be conducted with large sample size to validate the conclusions.

Evaluation of marginal/internal fit of fixed dental prostheses after digital, conventional, and combination impression techniques: A systematic review

“…Figure 3 depicts the publication dates of the 35 included studies and the already published systematic reviews [5, 6, 52–61, 44, 62, 63, 45–51] on this topic of digital impression making. It is obvious that there is a cutoff in the literature in 2016, while most reviews have been published in the last six years.…”

Effect of Different CAD/CAM Milling and 3D Printing Digital Fabrication Techniques on the Accuracy of PMMA Working Models and Vertical Marginal Fit of PMMA Provisional Dental Prosthesis: An In Vitro Study

“…Many researchers investigated the difference in accuracy between conventional physical impressions and optical impressions for a properly fitting restoration [ 16 ]. Studies [ 17 , 18 ] showed that optical impressions are more time-efficient and lead to higher operator and clinician satisfaction. They also concluded that optical impressions could produce acceptable FDPs with marginal gap of less than 120 µm, especially for single units and short FDPs [ 18 ].…”

“…Studies [ 17 , 18 ] showed that optical impressions are more time-efficient and lead to higher operator and clinician satisfaction. They also concluded that optical impressions could produce acceptable FDPs with marginal gap of less than 120 µm, especially for single units and short FDPs [ 18 ].…”

Marginal and internal fit of five‐unit zirconia‐based fixed dental prostheses fabricated with digital scans and conventional impressions: A comparative in vitro study

“…Few systematic reviews and meta‐analyses have compared the accuracy of DS methods with CI techniques by evaluating the marginal and internal fit of zirconia‐based FDP restorations 7,15–23 . Some authors concluded that digital scanning provides significantly better marginal and internal fit than CI 15,23 .…”

“…Some authors concluded that digital scanning provides significantly better marginal and internal fit than CI 15,23 . Other authors have argued that the two impression techniques are comparable, and both achieve clinically acceptable marginal and internal thicknesses (39–120 μm) 7,16–22 . However, the in vitro and in vivo studies included in these reviews are only for single crowns or three‐unit FDPs 15 .…”