Ibrahim Ahmed Abdel-Khalek Dahb, Attiah Ali El-Gendy And Faten Ahmed Abu-Taleb,

ABSTRACT
Objective: To Compare Clinically And Radiographically Between The Polymethylmethacrylate (PMMA) And Thermoplastic Nylon As A Denture Base Material For Implant Assisted Overdenture.

Materials and Methods: Twenty Completely Edentulous Male Patients Were Selected For This Study. All Patients Received 2 Implants In The Canine Region Of The Mandible. After Healing Period, All Patients Were Received Ball Attachment And Randomly Classified Into Two Groups, Ten Patients Each. Group I (G I): Patients Received A Conventional Maxillary Denture And A Mandibular Implant Assisted Overdenture That Were Constructed From PMMA. Group II (G II): Patients Received A Maxillary Conventional Complete Denture And A Mandibular Implant Assisted Complete Overdenture That Were Constructed From Thermoplastic Nylon. In Each Group, All Patients Were Evaluated Clinically, Radiographically At Time Of Denture Insertion Then At 6 Months, 12 Months And 18 Months. At The End Of The Study The Data Were Collected, Tabulated And Statistically Analysed.

Results: All The Implants Of The Two Groups Were Successfully Osseointegrated. There Was No Statistically Significance Difference Between The Groups As Regards To Clinical Evaluation And Radiographic Evaluation By Digital Periapical And Panoramic Radiograph. On The Other Hand There Was Significant Difference Within The Same Group During The Follow Up Period. Conclusion: Polyamide Shows Promising Results As A Denture Base Material For Implant Assisted Overdenture That Appear In The Clinical And Radiographic Evaluation Results. Nylon Can Be Used As Alternative To PMMA As Denture Base Material For Implant Assisted Overdenture