Effect of Different Materials of Primary Telescopic Crowns on The Frictional Fit of Pekkton Partial Denture Frameworks in Kennedy Class I | ||
| Ain Shams Dental Journal | ||
| Article 15, Volume 22, Issue 2, June 2021, Pages 105-111 PDF (552.96 K) | ||
| Document Type: Original articles | ||
| DOI: 10.21608/asdj.2021.71094.1038 | ||
| Authors | ||
| Nehal Abdelmageed Mostafa* 1; Shimaa Lotfy Mohammed2; Yasmin Galal Eldin Thabet2 | ||
| 1Teaching assistant of removable prosthodontics, Faculty of dentistry, Egyptian Russian University. | ||
| 2Assistant professor of removable prosthodontics, Faculty of Dentistry, Ain Shams University. | ||
| Abstract | ||
| Abstract Objectives: This research was carried out to evaluate the friction fit (FF) of secondary telescopic crowns made of polyetherketone ketone (PEKK) in combination with primary crowns made of two different dental materials. Materials and methods: It is an in-vitro study where (6) Removable partial denture frameworks together with secondary crowns were milled from polyetherketone ketone (PEKK). Afterwards, (48) primary crowns were fabricated group (A): (24) PEKK-crowns were milled from Pekkton® blank, group (B): (24) zirconia-crowns were milled from a pre-sintered zirconium-dioxide blank. Friction fit (FF) was measured in a pull-off test (6 pull-off/specimen). Maximum tensile loads needed to dislodge the framework from the cast were calculated in Newtons. The acquired data were then tabulated and statistically analysed. Results: It was found that group (A) recorded statistically significant higher friction fit mean value (10.40±1.49) than group (B) (6.78±1.05) as indicated by t-test (P ≤ 0.05). Conclusion: PEKK primary crowns showed better friction fit than zirconia one in conjunction with PEKK framework in kennedy class I telescopic partial denture. | ||
| Keywords | ||
| PEKK; telescopic crowns; zirconia | ||
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