The 16th International Dental Congress will be held from 5th to 8th November 2013 in interContinental City Stars Hotel, Cairo, Egypt

EFFECT OF TWO DIFFERENT BAR DESIGNS FOR MANDIBULAR IMPLANT OVERDENTURE: A CROSS OVER STUDY OF CHEWING EFFICIENCY AND ELECTROMYOGRAPHIC ACTIVITY

Author: 

Gilan Youssef Al-Tonbary; Moustafa Abdou El-Syad; Mohamed Al-Kenawy and Ahmed Ali Habib

 
Purpose: The aim of this study was to compare within subjects, the effect of two different bar designs for mandibular implant overdenture on the chewing efficiency and masticatory muscle activity. Material and methods: Six completely edentulous male patients received new maxillary and mandibular dentures. Four osseointegrated implants were inserted in the mandible using standardized 2- stage submerged surgical protocol 3 months thereafter. After 3 months of the osseointegeration period, the four implants were connected with quadrilateral bar and new mandibular overdenture was constructed (group I). Masseter muscles activity was evaluated by electromyography during clench on the right and left side to record the interference pattern and the chewing ability was evaluated using chewing gum. After another 3 months, the quadrilateral bar was sectioned and converted to linear bar (Group II) connecting the anterior two implants and the same evaluations were repeated. Results: The results of this study revealed a significant increase in the masseter muscle activity and chewing ability of the patients wearing implant overdenture supported by quadrilateral bar compared to their muscle activity with conventional complete denture or when the overdenture retained with linear bar. Conclusion: the quadrilateral bar design used for implant supported mandibular overdentures may influence the retention and stability of the prosthesis and, thus, in turns improved masticatory performance. Key words: implant overdenture, bar, chewing efficiency, electromyographic activity

Page Number: 
3335