ASSESSMENT OF VARIOUS SURFACE TREATMENTS ON PULL OFF OF POLYETHERETHERKETONE ANTERIOR CROWN | ||
| Egyptian Dental Journal | ||
| Article 14, Volume 66, Issue 2 - April (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics), April 2020, Pages 1253-1259 PDF (898.98 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/edj.2020.28293.1105 | ||
| Authors | ||
| shams waz* 1; Ahmed Ziada2 | ||
| 1Lecturer of Fixed Prosthodontics, Faculty of Dentistry, Minia University, Minia, Egypt. | ||
| 2Lecturer of Fixed Prosthodontics, Faculty of Dentistry, Beni suef University, Beni suef Egypt | ||
| Abstract | ||
| ABSTRACT Objectives: to assess the pull off of Polyetheretherketone (PEEK) anterior crown after various surface treatments. Materials& Methods: Twenty Polyetheretherketone (PEEK) full coverage crown were constructed on prepared human maxillary central incisors. All of the crowns (n=20) were divided into four groups according to the surface treatment used group I ) Control , 2) 98% Sulphric acid, 3) 9.5% Hydrofluoric acid (HF ) 4) Air Abrasion with 50 μm AL2 O3 .( n=5 in each ) Afterwards, each crown specimens were cementeded to corresponding abutments using self-adhesive resin cement RelyX U200. Then, subjected to thermo cycling (5°C - 55°C,5000 cycles,). A universal testing machine was used to assess pull-off test. Data were collected, tabulated and statistically evaluated. Results: The mean pull off values were ranked as follows: group II (253.81±7.67 N) > group IV (221.18±3.91N) ≥ group III (203.20±8.23N) > group I (135.91±9.92N). The highest and lowest Pull off values was obtained in group II (253.81±7.67 N) and group I (135.91±9.92N), respectively. Conclusions: 98% sulphric acid PEEK surface treatment is recommended to achieve high retentive strength. | ||
| Keywords | ||
| Keywords: Anterior crown; Polyetheretherketone (PEEK); surface treatments; Pull Off test | ||
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