الفهرس 
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Abstract
Aim: This RCT is to evaluate the activity of masticatory muscles beside patient
satisfaction of implant supported mandibular overdentures using two different types of
attachments (ball and socket versus locator) in completely edentulous patients after insertion
of attachments by two weeks, three months and six months.
Methodology: The proposed number of the patients was 24, 12 per each
The patients were divided into two groups:
group A: patients receive mandibular overdenture with ball & socket attachments
group B: patients receive mandibular overdenture with locator attachments
Results: Implant retained mandibular overdentures with locator attachment system
provide high muscle activity in comparison with implant retained mandibular overdentures
with ball and socket attachment system.
Conclusions: The muscle activity of masseter is higher than temporalis muscle and the
activity of masseter and temporalis muscles increase with time. Patient satisfaction in the present
study with locator attachments system was superior to ball and socket.
Keywords: Edentulism, implants supported overdenture, ball-attachments, locatorattachments, muscle activity, electromyography, patient satisfaction.