Different Implant Subgingival Depth Affects the Trueness and Precision of the 3D Dental Implant Position: A Comparative in Vitro Study Among Five Digital Scanners and a Conventional Technique

A guide for maximizing the accuracy of intraoral digital scans: Part 2—Patient factors

“…Implant depth is related to clinical implant scan body height 43–45 . Studies have analyzed the influence of the implant depth on intraoral scanning accuracy with contradictory results reported 43–45 .…”

“…45 In a laboratory study, G omez-Polo et al 44 assessed the influence of the implant depth and implant angulation on the accuracy of complete-arch implant digital scans captured by using an IOS (Trios 3 from 3Shape A/S) and found that implant angulation and clinical scan body height influenced scanning accuracy. 44 When implants were parallel, no significant difference was computed between the different clinical implant scan body heights tested. However, in angulated implants, the shortest clinical implant scan body height resulted in the lowest scanning accuracy measured.…”

“…[41][42][43][44][45][46][47][48][49][50] Some studies have reported that implant angulation decreased the accuracy of the digital scans compared to the conventional impressions, or that implant angulation decreased the scanning accuracy of IOSs. 41,44,46,47,50 However, other studies have shown that implant angulation had no effect on intraoral scanning accuracy. 42 Implant depth is related to clinical implant scan body height.…”

“…[43][44][45] Studies have analyzed the influence of the implant depth on intraoral scanning accuracy with contradictory results reported. [43][44][45] In an in vitro study, Laohverapanich et al 43 when obtaining a half-arch scan on a partially edentulous cast with 1 implant scan body. The best accuracy values were obtained when implants had up to 6-mm depth.…”

“…[36][37][38][39][40] Implants Interimplant distance Implant position, angulation, and depth Inconsistencies are present in the literature regarding the influence of interimplant distance, implant position in the dental arch, and implant angulation and depth on intraoral scanning accuracy. [36][37][38][39][40][41][42][43][44][45][46][47] • In general, scanning discrepancies increases as interimplant distance increases. 46,47 • The implant positioned in the dental arch at the end of the intraoral digital scan obtains significantly higher distortion than the contralateral implant.…”