Higher prevalence of crown fractures was shown for LD and screw/implant platform fractures for TZ groups. The experimental results demonstrated that, by replacing an aerospace structural adhesive with surface-treated CF/PEEK tapes for the co-curing bonding of composite joints, the lap-shear strength of the joints had been increased by 47 and 68 at 22 ☌ and 130 ☌, respectively the fatigue life had been extended by 3. YZ and PEEK hybrid abutments promoted similar fatigue levels regardless of the crown materials, TZ crowns promoted a higher fatigue level than LD ones when associated with YZ abutments, and LD crowns promoted a similar fatigue level to TZ ones when associated with PEEK custom abutments. process occurs which enhanced the low stress level fatigue resistance of. Key properties of PEEK are: High mechanical strength at continuous-use temperatures up to 240C (464F) Best-in-class fatigue resistance Excellent wear and. Failure pattern analysis revealed a higher prevalence of crown fracture for LD groups, while screw/implant platform fractures were shown for TZ groups. In the PEEK abutment, the values obtained in the LD and TZ crowns showed no statistical difference however, in the YZ abutment, the TZ crown presented a load at failure value that was statistically higher than that for LD. Commercial plates of PEEK composites reinforced with PAN short carbon fibers 30 in weight, named CF30 PEEK, and unfilled PEEK plates of general purpose grade were purchased measuring 130 × 130 × 3 mm 3.Both materials are produced with injection molding technology. The failure pattern was evaluated, and the Weibull modulus was obtained for each condition.įatigue of both types of crowns was not influenced by the abutment material (LD-PEEK = LD-YZ TZ-PEEK = TZ-YZ). fatigue test set-up, the effect of the testing conditions and the effect of the material annealing was intensively done in 8. The load at failure and number of cycles until failure were recorded survival probabilities and specimen displacement were calculated for each step. In this study, the effects of microstructural inclusions on fatigue life of polyether ether ketone (PEEK) was investigated. The specimens were subjected to a mechanical fatigue test (step-stress analysis) by means of an initial 200-N load for 5,000 cycles and subsequent increase of 50 N (step-size) at each 10,000 cycles, until failure occurred. The effects of crystallinity on the mechanical properties on PEEK polymer and. Titanium intermediary abutments were placed, and the specimens were randomly allocated into four groups (n = 10) according to the customized hybrid abutment material (PEEK or YZ) and the monolithic crowns (TZ or LD) representing a maxillary central incisor crown. DIAO X, YEL and MAI Y - W ( 1997 ), ' Fatigue behaviour of CF / PEEK. The aim of this study was to inspect the mechanical fatigue behavior of an implant-supported restorative system using polyether ether ketone (PEEK) and yttria partially stabilized zirconia polycrystals (YZ) as materials for customized definitive implant-supported hybrid abutments, supporting two types of all-ceramic restorations: translucent zirconia (TZ) and lithium disilicate (LD) monolithic crowns.įorty Morse taper implants were included in epoxy resin.
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