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Biomedical subjects

C de Putter

Publications and source records attributed to C de Putter.

34 records · Page 2Linked to original sources
PubMed1995

[Implant-retained overdentures. Part 1. Clinical findings from an evaluation study].

A total of 429 patients who had received implant overdenture treatment, were clinically investigated by two dentists. Implant survival was high, especially for implants placed in the mandible. Results for the maxilla appeared far less promising. Complications that were observed predominantly concerned inflammation of the peri-implant tissues and poor oral hygiene. No statistically significant correlation could be found between patient and treatment characteristics at baseline and the clinical treatment outcome.

Dental Health Surveys↗
PubMed1994

Treatment outcome with implant-retained overdentures: Part I--Clinical findings and predictability of clinical treatment outcome.

This nationwide study was conducted to clinically evaluate treatment with implant-retained overdentures when applied on a large scale and to determine to what degree treatment results could be predicted from patient and treatment characteristics at baseline. A total of 429 patients who had received implant overdenture treatment were clinically investigated by two dentists. Implant survival was high, especially for implants placed in the mandible. Results for the maxilla appeared far less promising. Complications that were observed predominantly concerned inflammation of the peri-implant tissues and poor oral hygiene. The quality of the overdentures, as assessed on three conventional prosthetic parameters, was generally good. Nevertheless, overdentures on oral implants appear to require considerable maintenance. No statistically significant correlation could be found between patient and treatment characteristics at baseline and the clinical treatment outcome. So, although treatment outcome with implant-retained overdentures appeared favorable, clinical results were not individually predictable.

Dental Health Surveys↗
PubMed1994

Treatment outcome with implant-retained overdentures: Part II--Patient satisfaction and predictability of subjective treatment outcome.

The purpose of this study was to determine the effects of implant-overdenture treatment (IOT) on patients' complaints about dentures and the degree to which subjective treatment outcome could be predicted from baseline patient and treatment characteristics. Four groups of patients were distinguished: one pretreatment group, two posttreatment groups (1 year after treatment) and one reference group of denture wearers, who had not applied for any kind of treatment. They finished a questionnaire with 20 statements on denture complaints. Four scales concerning denture complaints could be distinguished and named after their underlying variables. Differences between the groups were analyzed. IOT treatment was shown to be very effective on a wide range of denture complaints. Little change was seen in patient satisfaction with regard to maxillary dentures when measured on the scales, although many patients wanted improvement in retention and stability for the maxillary denture after IOT treatment in the mandible. Sixteen percent of the denture wearers who had not applied for IOT expressed complaints regarding their mandibular dentures that matched or were more severe than those of the patients that had applied for IOT, before the actual start of treatment. Although generally the subjective treatment outcome of IOT was favorable, it could not be individually predicted from baseline patient and treatment characteristics.

Analysis of Variance↗
PubMed1994

[Implants in combination with an overdenture. Indications for the number of implants needed].

Considerations regarding the choice of the number of implants to be placed in combination with an implant-retained overdenture are discussed. Primarily, the characteristics of the chosen retention mechanism should be considered, as well as the magnitude and direction of forces on the implant-bone interface delivered through the suprastructure and implant, and the expected effects on the antagonist denture and/or jaw.

Bone Resorption↗
PubMed1994

[Dental implants under overlay dentures: an assessment].

In the treatment of edentulous patients endosseous implants play an increasingly important role. This paper discusses treatment and treatment results from a nationwide study among 429 edentulous patients who received implant-retained complete overdentures. In this particular treatment concept the denture derives retention and support from the implants that are placed in the edentulous part of the jaw. In terms of implant survival and patient satisfaction treatment results can be considered satisfactory, especially for the mandible. Of those patients who had an implant supported denture in the mandible, 95% considered the new mandibular denture to function better than the previously constructed denture. The chance on implant survival, three years postoperatively, is approximately 97%. It is concluded that oral rehabilitation in the mandible by means of endosseous implants in combination with a complete overdenture is a reliable and effective treatment alternative.

Aged↗
PubMed1993

Local residual ridge augmentation with solid hydroxyapatite blocks: Part I--An animal experiment.

Twenty-four implants were placed in the jaws of five dogs for evaluation of the possibility of correcting local resorption. Implants and surrounding tissues were evaluated clinically, radiographically, and histologically for periods of 3 to 24 months. The implants were clinically and radiographically stable. Some were surrounded by connective tissue fibers and others were bonded to underlying cortical bone.

Alveolar Bone Loss↗
PubMed1993

Local residual ridge augmentation with solid hydroxyapatite blocks: Part II--Correction of local resorption defects in 50 patients.

Replacement of anterior teeth with fixed or removable prostheses is often a compromise, because the resorbed residual ridge in the area of missing teeth cannot be ideally restored functionally and esthetically at the same time. To address this problem, 67 blocks of hydroxyapatite were placed subperiosteally to improve residual ridge resorption defects subsequent to loss of anterior teeth in 50 patients. The implants were evaluated clinically and radiographically for 6 months to 7 years after implantation. Results indicate that the suggested approach improves the esthetic results and the prognosis of fixed prostheses.

Adolescent↗
PubMed1990

Stress-absorbing elements in dental implants.

By means of finite element analysis, calculations, were made of the stress-distribution in bone around implants with and without stress-absorbing elements. A freestanding implant and an implant, it was concluded the variation in the E-modulus of the stress-absorbing element had no effect on the stresses in bone. Changing the shape of the stress-absorbing element had little effect on the stresses in cortical bone. For the implant connected with a natural tooth, it was concluded that a more uniform stress was obtained around the implant with a low E-modulus of the stress-absorbing element. It was also concluded that the bone surrounding the natural tooth showed a decrease in the height of the peak stresses.

Computer Simulation↗
PubMed1984

Reaction of surrounding gingiva to permucosal implants of dense hydroxyapatite in dogs.

Experimental and histological studies on the reaction of surrounding gingiva to permucosal implants of dense calcium hydroxyapatite were carried out in dogs. Epithelial attachment and connection of supra-alveolar collagen fibres to the implant surface seemed to form a biological seal around implants similar to that around natural teeth. However, excellent oral hygiene is very important for the maintenance of this biological seal.

Animals↗
PubMed1983

Transmucosal implants of dense hydroxylapatite.

Transmucosal application of implants of dense hydroxylapatite has been studied in a long-term animal experiment. Implants were loaded with crowns or removable restorations. It appeared that transmucosal implants adhered to bone similarly as in the submucosal application. The clinical aspect of gingival tissues around the implants was the same as that around the adjacent natural teeth. Histologically, there were indications for a good attachment of gingival tissues to the implants. Implants fractured due to fatigue failure of the ceramic material. Prestressing of the implants may be the solution to this problem. Failing implants can clinically be treated by submerging, removal, or substitution.

Alveolar Process↗