Precision and Accuracy of a Digital Impression Scanner in Full-Arch Implant Rehabilitation.
Purpose: To evaluate the accuracy and precision of a digital scanner used to scan four implants positioned according to an immediate loading implant protocol and to assess the accuracy of an aluminum framework fabricated from a digital impression.Materials and Methods: Five master casts reproducing...
| Publicado en: | International Journal of Prosthodontics Vol. 31; no. 2; pp. 171 - 176 |
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| Autores principales: | , , , |
| Formato: | pictorial research tables/charts Journal Article |
| Publicado: |
Quintessence Publishing Company Inc.
Mar/Apr2018
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=128618419&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 128618419 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 08932174 GQZ jtl: International Journal of Prosthodontics issn: 08932174 maglogo: N pubinfo: dt: Mar/Apr2018 vid: 31 iid: 2 pid: 1935 pub: Quintessence Publishing Company Inc. place: Batavia, Illinois artinfo: ui: 128618419 128618419 NLM29518813 128618419 10.11607/ijp.5535 NLM29518813 128618419 ppf: 171 ppct: 5 formats: tig: atl: Precision and Accuracy of a Digital Impression Scanner in Full-Arch Implant Rehabilitation. aug: au: Pesce, Paolo Pera, Francesco Setti, Paolo Menini, Maria affil: Research Fellow, Department of Surgical Sciences (DISC), Implant and Prosthetic Dentistry Unit, University of Genoa, Genoa, Italy sug: subj: Dental Implants Computer-Aided Design Dental Prosthesis, Implant-Supported Jaw, Edentulous Rehabilitation Technology, Dental Dental Models Dental Impression Materials ab: Purpose: To evaluate the accuracy and precision of a digital scanner used to scan four implants positioned according to an immediate loading implant protocol and to assess the accuracy of an aluminum framework fabricated from a digital impression.Materials and Methods: Five master casts reproducing different edentulous maxillae with four tilted implants were used. Four scan bodies were screwed onto the low-profile abutments, and a digital intraoral scanner was used to perform five digital impressions of each master cast. To assess trueness, a metal framework of the best digital impression was produced with computer-aided design/computer-assisted manufacture (CAD/CAM) technology and passive fit was assessed with the Sheffield test. Gaps between the frameworks and the implant analogs were measured with a stereomicroscope. To assess precision, three-dimensional (3D) point cloud processing software was used to measure the deviations between the five digital impressions of each cast by producing a color map. The deviation values were grouped in three classes, and differences were assessed between class 2 (representing lower discrepancies) and the assembled classes 1 and 3 (representing the higher negative and positive discrepancies, respectively).Results: The frameworks showed a mean gap of < 30 μm (range: 2 to 47 μm). A statistically significant difference was found between the two groups by the 3D point cloud software, with higher frequencies of points in class 2 than in grouped classes 1 and 3 (P < .001).Conclusion: Within the limits of this in vitro study, it appears that a digital impression may represent a reliable method for fabricating full-arch implant frameworks with good passive fit when tilted implants are present. pubtype: Academic Journal doctype: pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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