Fatigue Behavior of Computer-Aided Design/Computer-Assisted Manufacture Ceramic Abutments as a Function of Design and Ceramics Processing

Kelly,; Rungruanganunt, Patchanee

doi:10.11607/jomi.4698

Cited by 26 publications

(22 citation statements)

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“…The FEA results indicated that the maximum von Mises stress was higher in the aftermarket screws than it was in the OEM screws. This finding is in agreement with those of previous studies regarding aftermarket abutments 9 , 13 , 48 , 49 . Therefore, additional research and long-term clinical studies on the performance of aftermarket CAD/CAM screws are required to verify their reliability in clinical use.…”

Section: Discussionsupporting

confidence: 94%

“…Jarman et al 9 confirmed that the maximum load capacity of aftermarket Zr abutments was significantly lower than that of OEM Zr abutments. Kelly and Rungruanganunt 49 reported that OEM abutments (Straumann) outperformed aftermarket abutments (Atlantis) under cyclic loading, and they concluded that the differences in abutment design and fabrication between aftermarket and OEM manufacturers can significantly influence the clinical performance of the abutments. The aforementioned results raise concerns regarding the use of aftermarket CAD/CAM prosthesis components.…”

Section: Discussionmentioning

confidence: 99%

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Biomechanical effects of original equipment manufacturer and aftermarket abutment screws in zirconia abutment on dental implant assembly

Chen

Chang

et al. 2020

Sci Rep

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The use of aftermarket computer-aided design/computer-assisted manufacturing (CAD/CAM) prosthesis components in dental implants has become popular. This study aimed to (1) compare the accuracy of aftermarket CAD/CAM screws with that of original equipment manufacturer (OEM) abutment screws and (2) examine the biomechanical effects of different abutment screws used with zirconia abutment in an implant fixture by using three-dimensional finite element analysis (FEA). Significantly different measurements were obtained for the aftermarket CAD/CAM and OEM screws. The FEA results indicated that under the same loading condition, the maximum stress of the aftermarket CAD/CAM screws was 15.9% higher than that of the OEM screws. Moreover, the maximum stress position occurred in a wide section of the OEM screws but in the narrowest section of the aftermarket screws. The stress of the OEM zirconia abutment was 14.9% higher when using the aftermarket screws than when using the OEM screws. The effect of the manufacturing differences between aftermarket and OEM screws on the clinical effect of aftermarket screws is unpredictable. Therefore, aftermarket screws should be cautiously used clinically.

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Section: Discussionsupporting

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Biomechanical effects of original equipment manufacturer and aftermarket abutment screws in zirconia abutment on dental implant assembly

Chen

Chang

et al. 2020

Sci Rep

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“…Stimmelmayr and colleagues found that zirconia implant abutments connected to titanium cores showed higher fracture strength compared with one‐piece zirconia abutments and, for that reason, a bonded titanium abutment interface may be preferable. On the other hand, Kelly and colleagues tested titanium‐based and full zirconia abutments and found neither one to be superior in terms of fracture resistance. In another study by Gehrke and colleagues, the dislodging force of CAD/CAM zirconia copings that were resin‐bonded to titanium inserts exceeded the general limits of fracture resistance of the two‐piece abutments.…”

Section: A Comparison Of Current Options For Screw‐ and Cement‐retentionmentioning

confidence: 99%

A Current Perspective on Screw‐Retained Single‐Implant Restorations: A Review of Pertinent Literature

Priest

2017

J Esthet Restor Dent

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Screw-retained single-implant crowns should be reconsidered for many clinical situations for the following reasons: Predictable retention and retrievability No potential for the biologic consequences associated with residual cement As with cement-retained restorations, the choice between metal ceramics or all ceramics Only one margin, at the implant/abutment interface A single abutment/crown ceramic margin that can extend gingivally to the implant interface Nearly imperceptible blend of a composite resin in ceramic abutment access openings One component instead of two, which may simplify the restorative process CLINICAL SIGNIFICANCE: Innovations in implant and ceramic technology now give screw-retained prostheses the potential for esthetic, functional, and biologic outcomes that are comparable to those for cement-retained prostheses, while providing the advantages of predictable retrievability and avoidance of residual cement. Angled implants, however, remain a major indication for cement-retained single-implant prostheses. (J Esthet Restor Dent 29:161-171, 2017).

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“…Few in vitro studies have looked at the use of hybrid abutments and their influence on the fracture resistance of all-ceramic crown. 20 21 22 23 24 Stimmelmayr et al 24 reported that titanium abutments and hybrid abutments exhibited comparable mechanical properties. On the other hand, other studies showed that crown structure, 22 all-ceramic crown material 22 and the abutment material, 20 and manufacturer and design 23 all have proven to have an influence on the fracture resistance of all-ceramic crowns.…”

Section: Introductionmentioning

confidence: 99%

Fracture resistance of implant-supported monolithic crowns cemented to zirconia hybrid-abutments: zirconia-based crowns vs. lithium disilicate crowns

et al. 2018

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PURPOSEThe aim of this in vitro study was to investigate the fracture resistance under chewing simulation of implant-supported posterior restorations (crowns cemented to hybrid-abutments) made of different all-ceramic materials.MATERIALS AND METHODSMonolithic zirconia (MZr) and monolithic lithium disilicate (MLD) crowns for mandibular first molar were fabricated using computer-aided design/computer-aided manufacturing technology and then cemented to zirconia hybrid-abutments (Ti-based). Each group was divided into two subgroups (n=10): (A) control group, crowns were subjected to single load to fracture; (B) test group, crowns underwent chewing simulation using multiple loads for 1.2 million cycles at 1.2 Hz with simultaneous thermocycling between 5℃ and 55℃. Data was statistically analyzed with one-way ANOVA and a Post-Hoc test.RESULTSAll tested crowns survived chewing simulation resulting in 100% survival rate. However, wear facets were observed on all the crowns at the occlusal contact point. Fracture load of monolithic lithium disilicate crowns was statistically significantly lower than that of monolithic zirconia crowns. Also, fracture load was significantly reduced in both of the all-ceramic materials after exposure to chewing simulation and thermocycling. Crowns of all test groups exhibited cohesive fracture within the monolithic crown structure only, and no abutment fractures or screw loosening were observed.CONCLUSIONWhen supported by implants, monolithic zirconia restorations cemented to hybrid abutments withstand masticatory forces. Also, fatigue loading accompanied by simultaneous thermocycling significantly reduces the strength of both of the all-ceramic materials. Moreover, further research is needed to define potentials, limits, and long-term serviceability of the materials and hybrid abutments.

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Fatigue Behavior of Computer-Aided Design/Computer-Assisted Manufacture Ceramic Abutments as a Function of Design and Ceramics Processing

Cited by 26 publications

References 0 publications

Biomechanical effects of original equipment manufacturer and aftermarket abutment screws in zirconia abutment on dental implant assembly

Biomechanical effects of original equipment manufacturer and aftermarket abutment screws in zirconia abutment on dental implant assembly

A Current Perspective on Screw‐Retained Single‐Implant Restorations: A Review of Pertinent Literature

Fracture resistance of implant-supported monolithic crowns cemented to zirconia hybrid-abutments: zirconia-based crowns vs. lithium disilicate crowns

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