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Clinical Evaluation of Retention of Metallic Versus Thermoplastic Resin Frameworks in Maxillary Distal Extension Cases


Affiliations
1 Assistant Lecturer; Prosthodontic Department, Minia, Abu Qurqas, Egypt
2 Assistant Professor of Prosthetic Dentistr, Egypt
3 Professor of Prosthetic Dentistry, and Vice Dean for Student Affairs, Egypt
4 Professor of Removable Prosthodontics Department, and previous Dean of the Faculty of Dentistry Minia University, Egypt
     

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Background and Objective: Acetal resin has been introduced as an esthetic partial denture material. However, the retention of this material when compared to cobalt-chromium (Co-cr) frame works still unclear when applied clinically. Purpose: To evaluate the retention of (acetal resin) as compared to (Co-cr)frame works and clasps. Materials and Method: The present study is a randomized controlled trial that included 24 healthy patients with Kennedy class I partially edentulous maxilla and dentulous mandibles. The patients were selected from the out-patient clinic (Dep. of Prosthetic Dentistry, Minia University) and divided randomly into two equal groups according to the used denture base material; Group 1 received maxillary partial denture with (Co-cr) clasps and frameworks. Group 2 received maxillary partial denture with acetal resin clasps and frameworks. Retention of the prosthesis was evaluated at partial denture insertion, after 3, 6 and 12 months. Paired t-test was used at p ≤ 0.05 to assess the changes in the above parameter in each group. Student t-test was used to compare between the two groups. Results: Retentive force mean values of thermoplastic group were significantly lower than metallic group at denture insertion and at all follow up intervals. Conclusion: Acetal resin frameworks and clasps provide lesser retention values when compared to chrome cobalt. Clinical Implications: Although there was lesser retention power of acetal resin than Co-cr, further study has to be done regarding various thicknesses and designs of clasps and framework for its successful dental application.

Keywords

Cobalt-chromium, Removal partial denture, Retention, Acetal resin
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  • Clinical Evaluation of Retention of Metallic Versus Thermoplastic Resin Frameworks in Maxillary Distal Extension Cases

Abstract Views: 102  |  PDF Views: 0

Authors

F. Mostafa Elsayed Abdel Haleem
Assistant Lecturer; Prosthodontic Department, Minia, Abu Qurqas, Egypt
Ahmed Gamal Ahmed Hassan
Assistant Professor of Prosthetic Dentistr, Egypt
Emad Mohamed Tolba M. Agamy
Professor of Prosthetic Dentistry, and Vice Dean for Student Affairs, Egypt
Gehan Fekry Mohammed
Professor of Removable Prosthodontics Department, and previous Dean of the Faculty of Dentistry Minia University, Egypt

Abstract


Background and Objective: Acetal resin has been introduced as an esthetic partial denture material. However, the retention of this material when compared to cobalt-chromium (Co-cr) frame works still unclear when applied clinically. Purpose: To evaluate the retention of (acetal resin) as compared to (Co-cr)frame works and clasps. Materials and Method: The present study is a randomized controlled trial that included 24 healthy patients with Kennedy class I partially edentulous maxilla and dentulous mandibles. The patients were selected from the out-patient clinic (Dep. of Prosthetic Dentistry, Minia University) and divided randomly into two equal groups according to the used denture base material; Group 1 received maxillary partial denture with (Co-cr) clasps and frameworks. Group 2 received maxillary partial denture with acetal resin clasps and frameworks. Retention of the prosthesis was evaluated at partial denture insertion, after 3, 6 and 12 months. Paired t-test was used at p ≤ 0.05 to assess the changes in the above parameter in each group. Student t-test was used to compare between the two groups. Results: Retentive force mean values of thermoplastic group were significantly lower than metallic group at denture insertion and at all follow up intervals. Conclusion: Acetal resin frameworks and clasps provide lesser retention values when compared to chrome cobalt. Clinical Implications: Although there was lesser retention power of acetal resin than Co-cr, further study has to be done regarding various thicknesses and designs of clasps and framework for its successful dental application.

Keywords


Cobalt-chromium, Removal partial denture, Retention, Acetal resin



DOI: https://doi.org/10.37506/v11%2Fi2%2F2020%2Fijphrd%2F195017