Osseointegration and restoration of a new implant :
Date
1989
DOI
Authors
Akhavan-Safa, Saadat
Version
OA Version
Citation
Abstract
This clinical study was conducted to assess the efficacy of a two-stage cylindrical implant and is one of the initial clinical trials of a finned two-stage cylinder called the DB implant, currently known as the Stryker Precision [TM] root form dental implant.
The Driskell Bioengineering (DB) implant is a new dental implant introduced in 1985. It is designed and precision made for free standing single tooth replacement and as an abutment for fixed partial denture and overdenture support.
Two groups of patients were selected for this study. The first group involved denture-wearing patients suffering from unstable and poorly retained dentures. The second group involved patients with a single missing tooth and a desire to replace it without altering the adjacent teeth.
Clinical as well as radiographic examinations of candidates were performed. A total of twelve patients were selected for the study.
Overdenture application: Eight patients were selected. Two DB implants were placed in the canine sites. The implants were buried and healed unloaded for a period of four (mandibular) to six (maxillary) months while the patient was wearing his/her denture. The implant condition was evaluated after surgical insertion at one week, two weeks, one month, two months, three months and four months. After this healing phase implants were exposed, abutment heads attached, and retrofitted to the patient's existing denture by making a space inside the denture and relining it with a resilient lining material.
A total of twenty implants were placed for overdenture patients. Seven patients received bilateral implants in their lower jaw and one of these patients also received bilateral implant in the upper jaw; one patient received a single implant in the lower left side to be used with a natural root with coping in the opposite side. Three osseointegration failures occurred, all mandibular, demonstrating perimplant radiolucency at two, two and three months after insertion, two of them were reinserted* and one underwent substitution.**
Single tooth application: Four patients were selected for this application.
A DB implant was inserted in a single tooth edentulous space and left buried for four to six months while the patient wore a transitional denture. The same periodic clinical and radiographic examinations used for overdenture patients were performed. After the primary healing phase, the implant was exposed surgically and a taper-lock head inserted into the implant and restored temporarily with an acrylic crown. Six weeks after exposure and head insertion, the periodontal condition was evaluated and, if healthy, final preparation and final impression for a ceramic metal crown followed. The finished crown was cemented with zinc phosphate cement. A total of four single implants were placed. Two patients received implants to replace their upper central incisors, and two, their upper premolars. All implants placed for a single missing tooth were well integrated.
* Replacement same site.
** Replacement different site.
Description
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Includes colored photographs.
Thesis (M.Sc.D.)--Boston University, Henry M. Goldman School of Graduate Dentistry, 1989 (Prosthodontics)
Bibliography : leaves 69-77.
Includes colored photographs.
Thesis (M.Sc.D.)--Boston University, Henry M. Goldman School of Graduate Dentistry, 1989 (Prosthodontics)
Bibliography : leaves 69-77.
License
This work is protected by copyright. Downloading is restricted to the BU community. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.