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Title: A prospective study to quantify the bone-retaining properties of para-immediate dental implants in the maxilla
Author: Wilson, Neil A.
ISNI:       0000 0001 3570 4284
Awarding Body: Manchester University
Current Institution: University of Manchester
Date of Award: 2008
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The study was split into two parts. Part one was a prospective study, 90 patients were treated between the ages of 17 and 71 years. The patients were split into two groups. Fifty one patients were placed into Group 1. These patients received a single tooth implant placed at the time of tooth extraction. There were 33 patients in Group 2. For these patients, the remains of the sockets were augmented with Tri-Calcium Phosphate and Calcium Sulphate and allowed to heal for six months before an implant was placed. Serial study casts were made every three months for one year to assess the change in the area of the residual alveolar ridge. Four patients were unable to have implants placed because there was insufficient bone available following augmentation. Of the remaining 86 patients who had implants placed, 5 (5.8%) of the implants failed. Measurement of the changes in the area of the ridge revealed a highly significant reduction in the ridge area over the 12 month period. In Group 1 the reduction in area was 2% with 1.5% occurring in the first 2-4 months, while in Group 2 there was a reduction of 16.9% over the observation period, with a 15% reduction in area occurring in the first 2-4 months. Group 1 utilised longer (15mm) and wider (4.5mm diameter) implants significantly more than group 2 in which significantly more 12mm long and 3.75mm diameter implants were used. Immediate implants were shown to maintain the ridge shape over the observation period. The patients in Group 2 lost 16.9% of area over the same period. However in all but four cases implants could be placed. Part 2 of the study was the development of an aesthetic index.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available