Retention of Milled Removable Partial Frameworks (PEEK) Against Zircon Crowns in Mandibular Kennedy Class I Cases : An In-Vitro Study
sayed, H., mohsen, H., Salah-Eldin, A., Ismail, A. (2025). Retention of Milled Removable Partial Frameworks (PEEK) Against Zircon Crowns in Mandibular Kennedy Class I Cases : An In-Vitro Study. EKB Journal Management System, (), -. doi: 10.21608/mjmr.2025.360362.1907
haitham bakry sayed; haitham mohsen; Amr Salah-Eldin; Amr Ismail. "Retention of Milled Removable Partial Frameworks (PEEK) Against Zircon Crowns in Mandibular Kennedy Class I Cases : An In-Vitro Study". EKB Journal Management System, , , 2025, -. doi: 10.21608/mjmr.2025.360362.1907
sayed, H., mohsen, H., Salah-Eldin, A., Ismail, A. (2025). 'Retention of Milled Removable Partial Frameworks (PEEK) Against Zircon Crowns in Mandibular Kennedy Class I Cases : An In-Vitro Study', EKB Journal Management System, (), pp. -. doi: 10.21608/mjmr.2025.360362.1907
sayed, H., mohsen, H., Salah-Eldin, A., Ismail, A. Retention of Milled Removable Partial Frameworks (PEEK) Against Zircon Crowns in Mandibular Kennedy Class I Cases : An In-Vitro Study. EKB Journal Management System, 2025; (): -. doi: 10.21608/mjmr.2025.360362.1907

Retention of Milled Removable Partial Frameworks (PEEK) Against Zircon Crowns in Mandibular Kennedy Class I Cases : An In-Vitro Study

Minia Journal of Medical Research
Articles in Press, Accepted Manuscript, Available Online from 24 February 2025  XML
Document Type: Original Article
DOI: 10.21608/mjmr.2025.360362.1907
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Authors
haitham bakry sayed email 1; haitham mohsenorcid 2; Amr Salah-Eldinorcid 3; Amr Ismail4
1Prosthetic Dentistry Department , Faculty Of Dentistry , Minia University
2faculty of dentistry/Prosthetic Dentistry Department/Minia university
3Prosthetic Dentistry Department, Faculty of Dentistry, Fayoum University
4Prosthetic Dentistry Department, Faculty of Dentistry, Minia University
Abstract
Aim: Retention Evaluation of a CAD- CAM Milled Removable Partial Frameworks (PEEK) Against zircon Crowns in Mandibular Kennedy Class I Cases

Methods: Six frameworks were constructed from polyetheretherketone (PEEK) material were used on a model; simulating a mandibular Kennedy class I situation; was used. Retention was tested, recorded and the mean was calculated at the time of insertion (T zero) then after 120 (T1), 360 (T2), 720 (T3), 1080 (T4) and 1440 (T5) cycles.

Results: The retention at baseline (1.02 ± 0.2) was significantly the highest, then after 3 months significantly decreased to (0.70 ± 0.11), and after 12 months significantly decreased to (0.49 ± 0.01). There was insignificant difference between baseline (1.02 ± 0.2) and after 1 month (0.95± 0.03). There was insignificant difference between after 3months (0.7± 0.11), after 6 months (0.6± 0.11), and after 9 months (0.56 ± 0.12). There was insignificant difference between after 6 months (0.6± 0.11), after 9 months (0.56 ± 0.12), and after 12 months (0.49 ± 0.01).

Conclusion: Within the limitations of this study the retention at baseline was significantly the highest as the retention decreased from baseline, then after 3 months, and after 12 months.
Keywords
Removable Partial Frameworks; Retention; Polyetheretherketone
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