European Journal of Prosthodontics and Restorative Dentistry

cover art

Cover Date:
June 2013
Print ISSN:
0965-7452
Vol:
21
Issue:
2

The Effect of Denture Design and Fixatives on the Retention of Mandibular Complete Dentures Tested on a Novel In-vitro Edentulous Model

doi:10.1922/EJPRD_1145Johnson11

Abstract - The aim of this study was to evaluate the effect of the design (extension and adaptation) of a mandibular complete acrylic denture and the use of denture adhesives using a novel in-vitro edentulous model. The model is a highly anatomically accurate replica based on a moderately resorbed human mandibular edentulous arch. The model has been designed and fabricated by means of an elaborate clinical and technical process that employs synthetic elastomeric materials with properties that attempts to reproduce in-vitro characteristics of the soft tissues overlying the ridges and immediate reflected tissues. This model was used to measure and compare the retention of mandibular dentures of varying designs (well-fitting, over- and under-extended) with and without the aid of denture fixatives. Retention tests were conducted with different volumes of artificial saliva at a cross head speed of 50 mm/min with 4 equidistant holding points on the denture occlusal surface, using a universal tensile testing machine in an axial pull direction. The effect of three denture adhesives on denture retention was also tested on the same denture types at different times over a period of 5 hours and beyond. The in-vitro model presented can be effectively used to test the retention of mandibular complete dentures. The speed of dislodgement force and amount of saliva are important variables in mandibular denture retention. The retention of well-fitting dentures was statistically higher than that of ill-fitting dentures. A significantly higher retention force was needed to dislodge mandibular dentures (well and ill-fitting dentures) when using a denture adhesive.

KEYWORDS: In-vitro testing, artificial edentulous mandibular model, denture adhesive, denture retention, saliva volume

Article Price
£15.00
Institution Article Price
£
Page Start
64
Page End
74
Authors
A. Johnson, N. Al-Kaisy, C.A. Miller, N. Martin

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  1. The Quality of Impressions for Crowns and Bridges: An Assessment of the Work Received at Three Commercial Dental Laboratories. Assessing the Quality of the Impressions of Prepared Teeth.
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  1. Frechette Awards 2013
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  1. Comparison of the Flexural Strength of Two Dual Cure Adhesive Resin Cements Under Oral Simulated Conditions: An In-Vitro Study
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  1. Comparison of Elastomeric Impression Materials’ Thixotropic Behavior
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