Ragi A. Alemam, Mohamed M. Elsheikh, Nahed A. Kashef And Azza M. Hassan,

ABSTRACT
Objective: The Objective Of This Study Was To Evaluate The Effect Of Two Different Flexible Denture Base Materials (Flexiplast And Versacryl) On Retention And Microbial Changes In Completely Edentulous Patients With A Bilateral Maxillary Buccal Undercut.

Materials and Methods: Twenty Completely Edentulous Patients With Bilateral Maxillary Buccal Undercut Were Selected For This Study. Patients Were Divided Into Two Groups: Group I Received Their Dentures Constructed From Flexiplast, While Group II Received Their Dentures Constructed From Versacryl. Patients Were Recalled For Follow Up At Delivery, 1 Week, 3 Months And 6 Months To Measure Denture Retention Using A Digital Force Gauge In Newton. Microbiological Changes Were Evaluated Using Standard Isolation And Identification Techniques At Different Time Intervals. The Data Of This Study Were Collected, Tabulated And Statistically Analyzed Using SPSS 20 And Student?s T-test To Compare Between The Two Groups.

Results: Flexiplast Has A Higher Retention Value Than Versacryl During The Six Month Periods. Flexiplast Showed A Slightly Higher Number Of Microorganisms Than The Versacryl In The First Week. However, Both Groups Reported The Same Number Of Microorganisms After Three And Six Month Periods. Conclusion: Flexiplast Denture Retention Was Higher Than Versacryl Denture. Retention Of Versacryl Denture Was Increasing With Time. Both Groups Showed Microorganisms Growth With Time.