EDJ

COMPARISON OF THE RETENTION BETWEEN TWO TYPES OF THE FLEXIBLE UPPER PARTIAL DENTURE (ACETAL VERSUS BRE-FLEX 2ND EDITION) USING DIGITAL GAUGE FORCE (IN VITRO STUDY)

Ahmed N. Elbolaty, Nadia A. Abbas And Nora M. Sheta,

ABSTRACT
Objective: In-vitro Study Was To Compare The Retention Between Two Types Of Esthetic Flexible Clasps. Acetal Versus Bre-flex2nd Edition Was Used In Bilateral Bounded Maxillary Removable Partial Denture Cases.

Materials and Methods: Standard Experimental Metal Model Of Maxillary Edentulous Case (Kennedy Class III With Modification I) Missing Right And Left Second Premolars And First Molars Was Fabricated To Be Used As Master Model To Simulate The Oral Cavity.Fourteen RPD Frameworks Were Fabricated Using Thermopress 400.Seven RPDs For Each Group,which Group (A) Acetal RPD And Group (B) Breflex 2nd Edition Each .Aker Clasp Design Was Engaged 0.02 Inch Undercut For All Clasps, Loop Was Centralized In The Major Connector. Digital Force Gauge Was Used For Both Groups To Measure The Retention.

Results: The Highest Mean Value Of Retention Was Found In Bre-flex2nd Edition (7.20 � 0.77), The Lowest Mean Value Of Retention Was Found In Acetal (5.97 � 0.75). Conclusion: It Was Concluded That The Mean Retentive Force Required To Remove The Acetal Clasp Was Found To Be Statistically Significant Lower Than This Required To Remove Bre-flex 2nd Edition Clasp.

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