Marwa Abd El-Aziz Abd El-Wahab El-Sayed, Zeinab Ahmed Hussein El-Shorbagy And Manal Ahmed El-Ebiary And Emad Abd-Allah Mabrouk,

ABSTRACT


Purpose: The Aim Of This Study Is To Compare Acrylic, Acrylic Reinforced With Glass Fibers And Flexible Acrylic Denture Base For Single Implant Overdentures Retained By Ball And Socket Attachment.

Materials and Methods: It Was Classified Into 3 Equal Groups According To The Tested Materials. Fratigue Test Was Made For All Samples Of The Three Groups. The Dental Implant Was Embeded Vertically In The Middle Of A Cold Cured Acrylic Resin. Ball And Socket Attachment Was Used. Specimens 60 Mm Long, 1.5 Mm Thick, And 10 Mm Wide Was Fabricated From Baseplate Wax. Fabrication Of Conventional Acrylic Resin And Acrylic Resin Reinforced With Glass Fibers Samples: Chopped Glass Fibers Were Added In Concentration 5 % By Weight. Heat Polymerized Denture Base Resin Was Used According To The Manufacturer,s Instructions To Pack The Flasks. Fabrication Of Nylon Samples: Investment Is Done In A Special Flask. Deflasking Is Completed And Specimens Were Finished And Polished.

Results: It Was Found That Conventional Group Recorded The Highest Number Of Cycles Mean Value Followed By Flexible Group While Fiber-reinforced Acrylic Group Recorded The Lowest Number Of Cycles. It Was Found That Conventional Group Recorded The Highest Fatigue Strength Followed By Fiber-reinforced Acrylic Group While Flexible Group Recorded The Lowest Cyclic Flexure Strength Mean Value. The Result Of This Study Show That No Breakage Occurs To The Flexible Samples. Conclusion: Conventional Group Recorded The Highest Fatigue Strength Then Fiber-reinforced Acrylic Group Followed By Flexible Group.