Effect of Implant Divergence on the Accuracy of Definitive Casts Created from Traditional and Digital Implant-Level Impressions: An In Vitro Comparative Study

Lin, Wei‐Shao; Harris, Bryan T.; Elathamna, Eiad; Abdel‐Azim, Tamer; Morton, Dean

doi:10.11607/jomi.3592

Cited by 65 publications

(91 citation statements)

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“…compared the accuracy of definitive casts fabricated with digital and conventional techniques in a partially edentulous mandible with two implant analogs placed at different degrees of divergence (Lin et al. ). The results of this study showed that the degree of divergence did not affect the accuracy of the conventionally generated stone casts, but it had a significant impact on the accuracy of milled casts generated digitally.…”

Section: Discussionmentioning

confidence: 98%

“…The authors highlighted the importance of a verification jig even with a digital workflow, which may be unnecessary with future improvement and development of intra‐oral scanners and CAD/CAM systems (Lin et al. ). For edentulous scenario with multiple implants, no comparative study is available yet, assessing the accuracy of physical and digital casts.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Digital vs. conventional full‐arch implant impressions: a comparative study

Amin

Weber

Finkelman

et al. 2016

Clinical Oral Implants Res

192

184

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Digital vs. conventional full‐arch implant impressions: a comparative study

Amin

Weber

Finkelman

et al. 2016

Clinical Oral Implants Res

192

184

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show abstract

“…In addition, some patients dislike the smell and taste of various materials used for making impressions; they may also experience discomfort due to the gag reflex. Therefore, an IOS method can increase patient comfort during treatment …”

mentioning

confidence: 99%

Accuracy of Scanned Stock Abutments Using Different Intraoral Scanners: An In Vitro Study

Kim

Hong

Kang

et al. 2019

Journal of Prosthodontics

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Purpose To determine the accuracy of a digital manufacturing method for dental implant restorations on stock abutments using intraoral scanners and prefabricated stock‐abutment libraries. Materials and Methods Two dental implants with internal hexagonal connections were placed in the mandibular second premolar and second molar areas of a partially edentulous dentoform model; stock abutments with a diameter of 5 mm, abutment height of 5.5 mm, and gingival cuff height of 2 mm were connected. The study model was scanned 10 times using a reference tabletop scanner and 5 types of intraoral scanners (IOSs). The data collected by 5 types of IOSs were divided into 3 groups, based on the type and matching of stock abutment library data: no library, optical library, and contact library groups. A total of 160 data files were analyzed, including reference data. The resulting data were used to evaluate trueness and precision. Results Trueness and precision values in the group in which library data of the stock abutment were not used were 42.0 to 76.3 µm and 30.5 to 99.7 µm; corresponding values when the library data using an optical scanner were matched were 51.2 to 73.4 µm and 26.3 to 62.8 µm, and those when contact scanner library data were used were 30.1 to 62.4 µm and 15.5 to 55.9 µm. Thus, the accuracy of the contact library group was significantly higher than the accuracies of the no library (p < 0.001) and optical library groups (p < 0.001). Conclusion The application of prefabricated library data of stock abutments using a contact scanner improved the accuracy of scan data. Scan accuracy of the stock abutments differed significantly based on the type of scanner.

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“…Previous studies investigated the effect of angulation between implants on accuracy of impressions and restorations . Several authors have researched the impact of implant angulation on impression accuracy.…”

Section: Discussionmentioning

confidence: 99%

“…Several authors have researched the impact of implant angulation on impression accuracy. Lin et al investigated parallel, 15°, 30°, and 45° divergence between dental implants situations and claimed that the divergence between implants significantly affected the accuracy of impressions and that the conventional method was more accurate than a digital one . Similarly, Flugge et al found that increased inter‐implant distance and angulation negatively affected the accuracy of dental implant impressions .…”

Section: Discussionmentioning

confidence: 99%

Clinical and laboratory passive fit assessment of implant‐supported zirconia restorations fabricated using conventional and digital workflow

Rutkūnas

Larsson

Steyern

et al. 2020

Clin Implant Dent Rel Res

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Background Long‐term success of implant‐supported restorations can be affected by the accuracy of the prosthodontic workflow which may differ between conventional and digital techniques. Purpose The purpose was to compare the fit of two‐implant‐supported restorations, fabricated using conventional and digital workflows and to assess the influence of distance and angulation between the implants on the passive fit of the prosthesis. The SR test was selected to evaluate the fit of two‐implant‐supported zirconia restorations. Materials and Methods Forty‐eight zirconia two‐implant‐supported restorations were fabricated according to conventional (group C, n = 24) and digital (group D, n = 24) workflows. The SR parameter was calculated as a difference of rotation angles of each screw in passive and nonpassive situations. SR values between groups C and D were compared by performing measurements intraorally, on master and control casts. Results SR intraorally in group C (16.25 ± 15.52°) was higher than it was in group D (13.85 ± 10.78°), but the difference was not statistically significant (P = .557). While measuring SR on the master cast, group C SR (6.04 ± 7.43°) had lower values than group D (13.12 ± 13.86°) (P = .0039). No statistically significant correlations were found between SR measurements and inter‐implant distance or angulation. Restorations with inter‐implant angle higher than 10° differed significantly from those with less than 10° angulation. Conclusions Digital restorations had a better fit on the control cast, which was used as a reference in this study. Angulation of more than 10° between the implants could negatively affect the passive fit of the digitally fabricated restorations intraorally.

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Effect of Implant Divergence on the Accuracy of Definitive Casts Created from Traditional and Digital Implant-Level Impressions: An In Vitro Comparative Study

Cited by 65 publications

References 0 publications

Digital vs. conventional full‐arch implant impressions: a comparative study

Digital vs. conventional full‐arch implant impressions: a comparative study

Accuracy of Scanned Stock Abutments Using Different Intraoral Scanners: An In Vitro Study

Clinical and laboratory passive fit assessment of implant‐supported zirconia restorations fabricated using conventional and digital workflow

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