Article Dans Une Revue Journal of Dentistry Année : 2023

Assessment of guide fitting using an intra-oral scanner: An in vitro study

Résumé

Objectives: The aim of this study was to evaluate the capacity of an intra-oral scanner (IOS) to assess the position of an endodontic guide in vitro.Methods: Fourteen extracted human teeth were placed into a maxillary model and scanned using computed tomography and a reference laboratory scanner. An ideal endodontic guide was then created and modified by adding defects of different thicknesses to simulate incorrect positions: 50 & mu;m, 150 & mu;m, 400 & mu;m, and 1000 & mu;m. For each thickness, guides were printed three times and each guide was scanned by three experimented operators using a Trios 4 IOS (3Shape, Copenhagen, Denmark). The 36 scans were compared using a best-fit alignment to the master model without defect to define the accuracy of the method and the positioning error.Results: The IOS presented a mean trueness of 1.28 & mu;m (SD= 12.70) and a mean precision of 11.52 & mu;m (SD= 62.17). Considering all sizes of defect, the mean measured position of the endodontic guide was highly correlated (R>0.99) with the expected position. Compared to the ideal guide, there was a mean linear deviation of 46.11 & mu;m (SD= 23.21) and a mean angular deviation of 5.9 degrees (SD= 1.2); this deviation was not influenced by the operator.Conclusion: The present study found that an IOS had good performance to detect a positioning error of the endodontic guide in vitro.Clinical Significance: This new application of IOS has a promising potential in clinical practice to assist practitioners during the fitting of guides.

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hal-04661816 , version 1 (09-07-2025)

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Elias Bittar, Pauline Binvignat, Cyril Villat, Jean-Christophe Maurin, Maxime Ducret, et al.. Assessment of guide fitting using an intra-oral scanner: An in vitro study. Journal of Dentistry, 2023, 135, ⟨10.1016/j.jdent.2023.104590⟩. ⟨hal-04661816⟩
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