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Ahmed Ibrahim Mahrous

Ahmed Ibrahim Mahrous

Al-Farabi Medical Colleges, KSA

Title: Influence of Attachment Type on Stress Distribution in Mandibular Implant-Retained Overdentures

Biography

Biography: Ahmed Ibrahim Mahrous

Abstract

Objective: to evaluate the stresses transmitted to the supporting structures of implant retained mandibular over-denture with different types of attachment.

Materials & methods: An acrylic model resembling the  edentulous mandibular arch was manufactured with simulated mucosa covering the residual ridge. Two implants were installed in the canine region one on each side. Complete lower overdenture was constructed on the model. Three different types of attachments were used successively; ball and socket, magnet and bar clip system.

Eight strain gauges were attached to the lingual and labial/buccal aspects of the two implants and first molar area on the right and left side of the model.

Microstrain readings were collected from the digital strain meter and statistically analyzed.

Results: When the load was applied anterioly: there was significant difference between the three types of attachments regarding stress distributions (a) on the implants with the highest stresses produced by the bar/clip attachment, (b) on the first molars with the highest stresses produced by the magnet attachment. When the load was applied posteriorly: there was significant difference between the three types of attachments regarding stress distributions (a) on the implants (loaded and none loaded) with the highest stresses produced by the bar/clip attachment, (b) on the first molars (loaded and non- loaded) with the highest stresses produced by the magnet attachment.