Marginal Gap and Screw Loosening in CAD/CAM Materials for Implant-Supported Fixed Partial Dentures: An In Vitro Study.
Purpose: To assess and compare the marginal gap and screw loosening, and their relationship, in three-unit implantsupported fixed partial dentures (ISFPDs). Materials and Methods: Fifty frameworks were fabricated from zirconia (Zir), cobalt-chromium (CoCr), titanium (Ti), polyetheretherketone (PEEK)...
| Publicado en: | International Journal of Oral & Maxillofacial Implants Vol. 41; no. 4; pp. 467 - 475 |
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| Autores principales: | , , , , , , |
| Formato: | equations & formulas pictorial research tables/charts Journal Article |
| Publicado: |
Quintessence Publishing Company Inc.
2026
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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=195912570&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 195912570 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 08822786 GR1 jtl: International Journal of Oral & Maxillofacial Implants issn: 08822786 maglogo: N pubinfo: dt: 2026 vid: 41 iid: 4 pid: 1935 pub: Quintessence Publishing Company Inc. place: Batavia, Illinois artinfo: ui: 195912570 195912570 195912570 10.11607/jomi.11390 195912570 ppf: 467 ppct: 8 formats: tig: atl: Marginal Gap and Screw Loosening in CAD/CAM Materials for Implant-Supported Fixed Partial Dentures: An In Vitro Study. aug: au: Aldakhili, Abdulrahman S. Alotaibi, Majd A. Alsalman, Abdulmohsen Al-Dulaijan, Yousif A. Alalawi, Haidar A. Shetty, Ashwin C. Al-Thobity, Ahmad M. affil: Fellowship of Prosthodontics Program, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia. sug: subj: Dental Prosthesis, Implant-Supported Denture, Partial, Fixed Computer-Aided Design Dental Prosthesis Design Dental Materials Materials Testing Human In Vitro Studies Chromium Titanium Prosthesis Failure Descriptive Statistics Microscopy, Electron, Scanning Dental Abutments Data Analysis Software Molar Bicuspid Biocompatible Materials ab: Purpose: To assess and compare the marginal gap and screw loosening, and their relationship, in three-unit implantsupported fixed partial dentures (ISFPDs). Materials and Methods: Fifty frameworks were fabricated from zirconia (Zir), cobalt-chromium (CoCr), titanium (Ti), polyetheretherketone (PEEK), and polyetherketoneketone (PEKK) (n = 10 each) using CAD/CAM technology on a standardized two-implant model. Vertical marginal discrepancies were measured using scanning electron microscopy at four points per framework/abutment interface. Screw loosening was assessed using a digital torque device. Data were analyzed using IBM SPSS software with a significance level of P < .05. Results: The marginal mean gap differed significantly between the groups across all four surfaces (P < .001). Overall, PEEK had the smallest marginal mean gap (67.22 ± 15.55 μm), followed by Ti (105.65 ± 30.52 μm), PEKK (106.80 ± 34.58 μm), and Zir (115.62 ± 22.02 μm), with CoCr showing the largest gap (176.87 ± 88.34 μm). In screw loosening tests, PEKK demonstrated the lowest values in both molar (0.44% ± 0.73%) and premolar (0.06% ± 1.40%) abutments, whereas PEEK showed the highest values in molar abutments (1.03% ± 1.21%) and CoCr showed the highest values in premolar abutments (2.15% ± 1.29%). No significant correlation was observed between the marginal gap and screw loosening (P > .05). Conclusions: The findings of this study emphasize the critical role of material selection in the clinical performance of ISFPDs. PEEK offers superior marginal adaptation, potentially reducing microleakage, whereas PEKK enhances screw stability, minimizing prosthetic complications pubtype: Academic Journal doctype: equations & formulas pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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