Prospective clinical evaluation of mandibular overdenture utilizing two prefabricated post stud attachments (intraradicular and extraradicular)‎

Abstract EN

Among the problems of edentulous patient are a lack of stability and a lack of retention plus diminished chewing ability.

The preservation of at least two abutments in the arch to retain the prosthesis has been proposed as a solution to these difficulties.

The aim of this study was to evaluate clinically the mandibular over denture utilizing two prefabricated posts, one intraradicular, (Reverse ball OT), and other extra radicular (pivot block ball OT) stud attachments.

The evaluations were done through measuring the electromyography activity of the muscle, the occlusal bite-force and the retention of the over denture for week, 1, 3, 6 months follow-up period.

Denture adjustments / complications and patient satisfaction with both designs of the attachment systems were also evaluated.

Twelve male patients were selected with two remaining canines in the mandibular arch and a completely edentulous maxillary arch.

Patients were randomized divided into two equal groups to receive either sequence I, two pivot ball OT over denture attachment followed by two reverse balls OT over denture attachments or sequence 2, and the pivot ball OT followed by the Reverse ball OT attachment.

Statistically, non-significant effects were seen between the two attachment designs with respect to muscle activity, denture adjustments / complications and patient satisfaction.

By time, the muscle activity significantly decreased in both attachment designs.

Retention showed a significant difference between the attachment designs in favor to reverse ball OT.

Also, their values significantly decreased by time in both attachment designs.

Additionally, the occlusal bite force showed significant values between the attachments in favor to pivot ball OT and it was significantly increased by time for both attachments.

There was a moderate negative correlation between the retention and bite force at the early period of follow-up.

It was concluded that both attachments had a nearly uniform positive results.

Ball OT had a better patient satisfaction, moderate muscle activity and high bite force.

Reverse ball OT had a good retention and little denture adjustments / complications.

Therefore, the patient condition and preference play a major role in the attachment selection.