Bone changes under osseointegrated implants supporting complete overdenture with and without attachments

Abstract

The purpose of this 18 months clinical study was to evaluate radiographically the bone density and bone height changes under osseointegrated implants supporting mandibular complete overdenture supported with resilient ball and socket attachment, rigid telescopic crown attachments and dome shape supports without attachments.

Fifteen male completely edentulous patients were selected to take part in this clinical study. When this study started, the patient's age ranged between 50 and 65 years.

Before placement of implants, patients underwent a thorough examination including medical history and radiographic reports by the aid of preconstructed radiographic stents to clarifY the patient condition whether he can be a candidate for implants or not. Patients, also, underwent an extensive introduction to implant treatment designed to inform them of procedure, risks, benefits, follow-up and required maintenance. All selected patients demonstrated that they are motivated to persue treatment and that they will cooperate with recommendations made by the clinician.

Before implant surgery took place, all patients had received new acrylic complete dentures, typical features of these dentures were semianatomic teeth • and bilaterally balanced occlusion. Each patient, then, has received surgically, two screw endosseous Calcitek hydroxyapatite coated implants, one in each

mandibular canine region following two stage surgical technique.

After a healing phase of four months, the dentures were modified to receive three types of supports, and patients were denuded into three groups, five for each: • Grcc;jJ I: Whom received overdentures provided with ball and socket attachments.

Group II: Whom received overdentures provided with telescopic crown attachments.