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Accuracy of a digital impression system based on active wavefront sampling technology for implants considering operator experience, implant angulation, and depth


Giménez, Beatriz; Özcan, Mutlu; Martínez-Rus, Francisco; Pradíes, Guillermo (2015). Accuracy of a digital impression system based on active wavefront sampling technology for implants considering operator experience, implant angulation, and depth. Clinical Implant Dentistry and Related Research, 17 Suppl:e54-e64.

Abstract

BACKGROUND There is a scarce knowledge on the accuracy of intraoral digital impression systems for dental implants. PURPOSE The purpose of this study is to evaluate the accuracy of a digital impression system considering clinical parameters. MATERIALS AND METHODS A master model with six implants (27, 25, 22, 12, 15, 17) was fitted with polyether ether ketone scan bodies. Implant no. 25 was placed with 30° mesial angulation in relation to the vertical plane (y axis), and implant no. 15 was positioned with 30° distal angulation. Implant no. 22 was placed 2 mm and no. 12, 4 mm below the gingiva. Experienced (n = 2) and inexperienced operators (n = 2) performed scanning (Lava Chairside Oral Scanner; 3 M ESPE, St Paul, MN, USA) at standard and high accuracy mode. Measurements involved five distances (27-25, 27-22, 27-12, 27-15, 27-17). Measurements with high accuracy three-dimensional coordinated measuring machine (CMM) of the master model acted as the true values. The data obtained were subtracted from those of the CMM values. RESULTS Experience of the operator significantly influenced the results (p = .000). Angulation (p = .195) and depth of implant (p = .399) did not show significant deviation from the true values. The mean difference between standard and high accuracy mode was 90 μm. CONCLUSIONS With the active wavefront sampling, technology-based digital impression system training seems to be compulsory. Impressions of angulated implants may diminish the accuracy of the impression, yet the results were not significant.

Abstract

BACKGROUND There is a scarce knowledge on the accuracy of intraoral digital impression systems for dental implants. PURPOSE The purpose of this study is to evaluate the accuracy of a digital impression system considering clinical parameters. MATERIALS AND METHODS A master model with six implants (27, 25, 22, 12, 15, 17) was fitted with polyether ether ketone scan bodies. Implant no. 25 was placed with 30° mesial angulation in relation to the vertical plane (y axis), and implant no. 15 was positioned with 30° distal angulation. Implant no. 22 was placed 2 mm and no. 12, 4 mm below the gingiva. Experienced (n = 2) and inexperienced operators (n = 2) performed scanning (Lava Chairside Oral Scanner; 3 M ESPE, St Paul, MN, USA) at standard and high accuracy mode. Measurements involved five distances (27-25, 27-22, 27-12, 27-15, 27-17). Measurements with high accuracy three-dimensional coordinated measuring machine (CMM) of the master model acted as the true values. The data obtained were subtracted from those of the CMM values. RESULTS Experience of the operator significantly influenced the results (p = .000). Angulation (p = .195) and depth of implant (p = .399) did not show significant deviation from the true values. The mean difference between standard and high accuracy mode was 90 μm. CONCLUSIONS With the active wavefront sampling, technology-based digital impression system training seems to be compulsory. Impressions of angulated implants may diminish the accuracy of the impression, yet the results were not significant.

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7 citations in Web of Science®
3 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Center for Dental Medicine > Clinic for Fixed and Removable Prosthodontics
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:January 2015
Deposited On:10 Dec 2015 13:53
Last Modified:05 Apr 2016 19:36
Publisher:Wiley-Blackwell Publishing, Inc.
ISSN:1523-0899
Publisher DOI:https://doi.org/10.1111/cid.12124
PubMed ID:23879869

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