Accuracy of Scanning Endocrown Preparation
Cavity; Digital Impression; Intraoral Scanner; Precision; Tooth Preparation; Trueness
European Journal of Prosthodontics and Restorative Dentistry (2026) 34 (2), 53–59
Accuracy of Scanning Endocrown Preparation --------------------------------------------------------------------
AuthorABSTRACTLiterature lacked sufficient evidence on the accuracy of modern intraoral scanners (IOSs) in capturing Endocrown preparations. This study assessed and compared the precision and trueness of six IOSs in scanning Endocrown preparation. Methods: This in vitro study involved scanning five extracted human teeth with one molar tooth prepared for Endocrown restoration. A total of 36 scans were conducted, scans were compared, and the root mean square (RMS) values were calculated to assess precision and trueness (N=306). Descriptive and inferential non-parametric statistics were performed. Results: Statistical analysis revealed significant differences between IOSs (p < 0.05). One IOS exhibited the highest precision with a mean RMS value of 6.49 µm, but had the lowest trueness, with a mean value of 52.35 µm. The range of precision values across all IOSs was 6.49 µm to 16.65 µm, whereas trueness values ranged from 27.07 µm to 52.35 µm. Notably, the order of IOSs varied between precision and trueness assessments. Conclusion: Clinicians are required to weigh both accuracy parameters, trueness and precision. Primescan demonstrated superior precision but lagged in trueness, whereas Aoralscan 3 had the highest trueness but the lowest precision. Aoralscan Elite and TRIOS 5 demonstrated both strong precision and trueness.
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Received:14.11.2025 Revised:10.12.2025 Accepted:24.01.2026
INTRODUCTIONIntraoral scanning has revolutionized digital dentistry by offering a reliable alternative to conventional impression techniques. Traditional impression methods, while widely used, have notable disadvantages, such as patient discomfort due to the physical characteristics, taste, and odor of impression materials. These factors often lead to suboptimal patient experiences and treatment compliance.1, 2 In contrast, intraoral scanners (IOSs) provide digital, three-dimensional (3D) capture of dental structures, allowing for enhanced accuracy, reduced chair time, and increased patient satisfaction.3-5 With the advancement in computer-aided design/computer-aided manufacturing (CAD/CAM) technology, IOS has become integral to a fully digital workflow, enabling precise and efficient fabrication of dental prostheses.6-9 Endocrowns are a minimally invasive restorative option for endodontically treated teeth, prioritizing the preservation of natural tooth structure. Compared to traditional crowns, which often necessitate extensive tooth preparation and the placement of posts for retention, Endocrowns rely on the pulp chamber and surrounding walls for mechanical stability.10 This approach minimizes procedural complexity, reduces treatment time, and helps maintain the tooth's structural integrity, offering improved biomechanical performance and aesthetics.11, 12 Furthermore, the use of adhesive bonding techniques with Endocrowns enhances their retention and strength, making them a reliable choice for restoring structurally compromised teeth.13 The success of Endocrowns is further enhanced by advancements in digital fabrication methods, particularly CAD/CAM technology, which ensures high precision and efficiency in their production. One study demonstrated excellent marginal and internal fit using CAD/CAM systems, ensuring durability even with varying cavity depths.14 Moreover, two studies underscored the superior fit and performance of lithium disilicate and PEEK CAD/CAM materials for Endocrowns.15, 16 Additionally, It was confirmed that milling-based digital techniques outperform conventional methods like heat pressing in achieving superior marginal and internal fit.17 However, despite the precision offered by CAD/CAM technology, challenges persist in accurately scanning Endocrowns •••••••••••••••••••••••••••••••• ejprd.org - Published by Riset Publishing Services LLC.
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