Session 1 Chair: Tetsuo Ohyama (Nihon University)

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#7

Retention of Magnetic Attachments Using Soft Lining Material and Photopolymerization Denture Base Resin

 

S. Okayama, H. Shimpo, Y. Suzuki, C. Ohkubo

 

Department of Removable Prosthodontics, Tsurumi University School of Dental Medicine

 

 

Abstract      

 Introduction:
Special care should be taken when magnetic attachment is mounted to denture base using auto-polymerized resin. In this study, the retentive force between modified magnetic attachments and denture base resins were evaluated using soft lining material and photopolymerization acrylic resin.
Materials and Method:
Magnetic attachments with three different undercuts were prepared in this study. Two surface treatments (adhesive resin cement and metal adhesive primer) were applied on the magnetic attachments. As the materials for retention magnetic attachment to denture base, two types of soft lining material (conventional type and adding of PMMA resin polymer type) and two photopolymerization denture base resins were prepared. After magnetic structure was attached exclusive jig, the tensile strengths were measured using an autography at a crosshead speed of 1.0 mm/min as retentive forces. Obtained data (n=5) were analyzed using a one-way ANOVA, Tukeyfs multiple comparison and t-test (ƒ¿=0.05).
Results and Discussion:
Modified magnetic attachments were showed the higher retentive force than conventional magnetic attachment (p<0.05). Surface treatments and retaining materials were indicated did not significant differences. All modified magnet attachments can be retained in denture base using soft lining materials and photopolymerization acrylic resins.