Accuracy of a Digital Impression System Based on Active Wavefront Sampling Technology for Implants Considering Operator Experience, Implant Angulation, and Depth

作者：Gimenez Beatriz^*; Oezcan Mutlu; Martinez Rus Francisco; Pradies Guillermo

来源：Clinical Implant Dentistry and Related Research, 2015, 17(S1): E54-E64.

DOI：10.1111/cid.12124

• accuracy
• dental implant
• digital impression
• implant angulation
• implant depth
• intraoral scanner

BackgroundThere is a scarce knowledge on the accuracy of intraoral digital impression systems for dental implants.
PurposeThe purpose of this study is to evaluate the accuracy of a digital impression system considering clinical parameters.
Materials and MethodsA 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 degrees mesial angulation in relation to the vertical plane (y axis), and implant no. 15 was positioned with 30 degrees distal angulation. Implant no. 22 was placed 2mm and no. 12, 4mm below the gingiva. Experienced (n=2) and inexperienced operators (n=2) performed scanning (Lava Chairside Oral Scanner; 3M 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.
ResultsExperience 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 90m.
ConclusionsWith 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.

• 出版日期2015-1