Techniques to improve the accuracy of complete arch implant intraoral digital scans: A systematic review

Paratelli, Andrea; Vania, Stefano; Gómez‐Polo, C.; Ortega, Rocío; Revilla‐León, Marta; Gómez‐Polo, Miguel

doi:10.1016/j.prosdent.2021.08.018

Cited by 43 publications

(39 citation statements)

References 69 publications

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“…To increase the accuracy of the resulting scan image, specific scanner movements are needed to superimpose the individual image of each snap with congruent features with sufficient reliability. 9 10 Several studies showed that a straight or linear scan movement along the dental arch had higher accuracy than the zigzag scan movement. 11 12 13 During the progressive and consecutive straight scan movements, congruent areas between each captured image might be easily recognized and properly stitched to each other.…”

Section: Discussionmentioning

confidence: 99%

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Impact of scanning strategy on the accuracy of complete-arch intraoral scans: a preliminary study on segmental scans and merge methods

Mai

Lee

et al. 2022

J Adv Prosthodont

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PURPOSE This study investigated the accuracy of full-arch intraoral scans obtained by various scan strategies with the segmental scan and merge methods. MATERIALS AND METHODS Seventy intraoral scans (seven scans per group) were performed using 10 scan strategies that differed in the segmental scan (1, 2, or 3 segments) and the scanning motion (straight, zigzag, or combined). The three-dimensional (3D) geometric accuracy of scan images was evaluated by comparison with a reference image in an image analysis software program, in terms of the arch shape discrepancies. Measurement parameters were the intermolar distance, interpremolar distance, anteroposterior distance, and global surface deviation. One-way analysis of variance and Tukey honestly significance difference post hoc tests were carried out to compare differences among the scan strategy groups (α = .05). RESULTS The linear discrepancy values of intraoral scans were not different among scan strategies performed with the single scan and segmental scan methods. In general, differences in the scan motion did not show different accuracies, except for the intermolar distance measured under the scan conditions of a 3-segmental scan and zigzag motion. The global surface deviations were not different among all scan strategies. CONCLUSION The segmental scan and merge methods using two scan parts appear to be reliable as an alternative to the single scan method for full-arch intraoral scans. When three segmental scans are involved, the accuracy of complete arch scan can be negatively affected.

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Section: Discussionmentioning

confidence: 99%

“…The hardware and software of the intraoral scan system were highlighted as a conditioning factor for scanning performance. 9 18 It is thought that developments in imaging engineering have decreased the effect of scan motion on the accuracy of the scan.…”

Section: Discussionmentioning

confidence: 99%

Impact of scanning strategy on the accuracy of complete-arch intraoral scans: a preliminary study on segmental scans and merge methods

Mai

Lee

et al. 2022

J Adv Prosthodont

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“…[14,16] In addition to its role as superimposition landmarks, fiducial markers also improve the accuracy of intraoral scanning of edentulous areas. [17,18] However, their contribution to the accuracy of intraoral scanning of full-arch edentulous cases is yet to be verified. Although the use of fiducial markers constitutes a straightforward, effective, and inexpensive procedure for an accurate superimposition of scanned data, it cannot be applied in situations with a lack of stable keratinized mucosa, which is frequently the case in edentulous mandible.…”

Section: Difference From Conventional Methodsmentioning

confidence: 99%

Superimposition of intraoral scans of an edentulous arch with implants and implant-supported provisional restoration, implementing a novel implant prosthetic scan body

Ntovas¹,

Spanopoulou²,

Martin

et al. 2023

J Prosthodont Res

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To describe a technique utilizing a novel prosthetic scan body, that assists the accurate merging of multiple scans (intra-and extraoral) of the interim prosthesis and edentulous arch with dental implants, during rehabilitation with a fixed implant-supported prosthesis. Methods: Intraoral scanning (Trios 3, 3Shape) of an interim implant-supported prosthesis was performed, subsequently followed by another scan, using five scan bodies, placed onto the implant abutments (SRA, Bone level, Straumann AG). Successively, the newly designed prosthetic scan bodies were attached to the abutment copings of the interim prosthesis, for extraoral scanning. Utilizing an implant library designed for the prosthetic scan body, the three scans were merged, providing all the necessary information for the digital design and fabrication of the fixed implant-supported prosthesis. Conclusion:The described clinical technique enabled effective and accurate superimposition of intra-and extraoral scans of the implant prosthesis. Superimposed data, including that of the position of dental implants and anatomy of soft tissue, provided essential information for the fabrication of a definitive implant-supported prosthesis. The novel prosthetic scan bodies attached to the implant prosthesis, assisted in merging intra-and extraoral scans, thus facilitating the rehabilitation of maxillary and/or mandibular edentulous dental arches. Further research is required to assess the accuracy of the proposed technique.

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“…The distance between two adjacent implants, as well as implant position in the dental arch, implant angulation, and depth of the existing implants have been identified as variables that can decrease intraoral scanning accuracy. [41][42][43][44][45][46][47][48][49][50][51][52] However, inconsistencies are present in the dental literature regarding the influence of these variables on intraoral scanning accuracy. [41][42][43][44][45][46][47][48][49][50][51][52] Additional studies are needed to further assess the influence of implant related factors on scanning accuracy of IOSs.…”

Section: Edentulous Spacesmentioning

confidence: 99%

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

Revilla‐León

Kois

2023

J Esthet Restor Dent

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Objectives: To describe the factors related to patient intraoral conditions that impact the scanning accuracy of intraoral scanners (IOSs). A new classification for these influencing factors is proposed to facilitate dental professionals' decision-making and maximize the accuracy and reliability of intraoral digital scans.Overview: Variables related to intraoral conditions of the patient that can influence the scanning accuracy of IOSs include tooth type, presence of interdental spaces, arch width variations, palate characteristics, wetness, existing restorations, characteristics of the surface being digitized, edentulous areas, interimplant distance, position, angulation, and depth of existing implants, and implant scan body selection. Conclusions:The knowledge and understanding of the patient's intraoral conditions that can impact the scanning accuracy of IOSs is a fundamental element for maximizing the accuracy of IOSs.

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Techniques to improve the accuracy of complete arch implant intraoral digital scans: A systematic review

Cited by 43 publications

References 69 publications

Impact of scanning strategy on the accuracy of complete-arch intraoral scans: a preliminary study on segmental scans and merge methods

Impact of scanning strategy on the accuracy of complete-arch intraoral scans: a preliminary study on segmental scans and merge methods

Superimposition of intraoral scans of an edentulous arch with implants and implant-supported provisional restoration, implementing a novel implant prosthetic scan body

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

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