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At least 469 records · Page 26Linked to original sources
PubMed1997

Prosthodontic and periodontal considerations for implant-supported dental restorations.

In the past two years, many reports concerning the outcome of treatment using dental implants have included more detailed data which allow insight into prosthodontic and periodontal considerations that affect success. It has become evident that unique biomechanical sequelae reflect the screw-joint character of the dental implant prosthesis. The relative stability of the screw joint and the biomechanical integrity of the components and prostheses themselves are new issues to contend with for restorative dentistry. The biologic sequelae of maintaining the implant-supported prostheses are revealed by bone maintenance and peri-implant mucosal health. The microbiologic similarity of tooth and implant-associated plaque at inflamed sites suggests that infected teeth are sources of potentially pathogenic bacteria at implants. However, the pathogenesis of inflammatory disease at implants is not fully defined. The evaluation and prognostic criteria of peri-implant inflammation remain controversial topics. The present aggregate data indicate that the long-term evaluation of implant-supported dental prosthesis must be performed with cautious optimism and attention to general biomechanical and biologic factors.

Dental Implants↗
PubMedDate not supplied

Adjustments and complications of mandibular overdentures retained by four implants. A comparison between superstructures with and without cantilever extensions.

PURPOSE: The aims of the study were to evaluate the postinsertion care needed by patients treated with four implants to retain mandibular overdentures and to compare two types of superstructures. MATERIALS AND METHODS: The study consisted of 54 patients who had been treated with conventional maxillary dentures and mandibular overdentures retained by four implants and a triple-bar superstructure with cantilever extensions (28 patients) or without cantilever extensions (26 patients). Differences between both groups with regard to age, gender, length, and diameter of the implants and preoperative mandibular bone height were tested by means of Student's t and chi-square tests with a probability level of 0.05. No significant differences were found. Both groups were retrospectively compared on adjustments and complications. The follow-up period after insertion of the dentures was 2 years. RESULTS: During the 2-year follow-up, 17 patients of the cantilever-extension group and 20 patients of the group without cantilever extensions needed adjustments, and 17 patients of the cantilever group and 12 patients of the group without cantilever extensions had to be treated because of complications. Significantly more (P < 0.05, chi-square test) superstructure fractures were present in the cantilever group (14 occasions in 7 patients) than in the group without cantilever extensions (1 occasion). All superstructure fractures in the cantilever group involved the cantilever extensions. CONCLUSION: This study demonstrated a considerable need for postinsertion care, confirming the necessity of routine follow-up services for patients restored with implant-retained overdentures. Furthermore, the results of this study suggest restriction of the use of cantilever extensions.

Chi-Square Distribution↗
PubMed1998

A new twist on single screw-retained implant restorations.

Several laboratories have stopped accepting implant cases because of the technical demands and the additional labor time required to process them. This article will discuss the IMPAC PDQ abutment (Vident, Brea CA). This abutment offers technicians a simple, reliable method for producing a strong, high quality implant substructure ready for porcelain application in a matter of minutes.

Crowns↗
PubMed1998

The Spline implant interface: analysis and initial clinical experiences.

A new implant with a spline-shaped interface (Spline) was recently introduced. A common and preferred method of connecting two cylinders in many fields of industry, the Spline offers implant dentistry improved strength and precision compared to earlier and current implant connection designs. A comparative engineering analysis of the Spline and the major implant interfaces is offered, including the possible clinical implications. Initial surgical and restorative experiences with cement and screw-retained prostheses are presented in case reports.

Adult↗
PubMedDate not supplied

Development and manufacture of prosthodontic components: do we need changes?

PURPOSE: Prosthodontic components for implant treatment have been developed with minimal reported scientific investigation. This paper aims to highlight a number of problems caused by this approach to the development and marketing of prosthodontic components and to suggest solutions. CONCLUSION: Prosthodontic components must be developed with a scientific approach that involves both laboratory and clinical testing so as to optimize treatment outcomes in the future.

Dental Abutments↗
PubMed1999

Tooth stabilization and splinting before and after periodontal therapy with fixed partial dentures.

The design and use of fixed partial dentures as a definitive restoration to stabilize and splint teeth have been reviewed. The provisionalization of the splinted patient has been described as it is incorporated into the treatment plan of patients with a weakened periodontium. The current controversy of incorporating implants in the patient requiring splinting was discussed, and recommendations are made. Dentists are encouraged to explain all potential ramifications of splinting with fixed partial dentures, including cost, frequency of office visits, and potential alterations or remakes of the prosthesis should physiologic demands surpass the capabilities of the remaining teeth.

Dental Implantation, Endosseous↗
PubMed1990

[Mechanism of retention of a complete prosthesis].

Patients with full dentures often experience some problems with their dentures, one of them is retention. The retention of a full denture is a result of many factors. Some factors are of a physical nature, others of a physiological nature. The dentist has to take these factors into account while modelling the borders, flanks and basis of the prosthesis. In obtaining the best shape of those borders, flanks and basis a special emphasis is put on the border and flank modelling and the individual impression.

Dental Impression Technique↗
PubMed1997

The reliability of implant-retained hinging overdentures for the fully edentulous mandible. An up to 9-year longitudinal study.

The treatment of fully edentulous mandibles by means of implant-supported hinging overdentures has become a routine therapy, although long-term data on the success rate of implants and prostheses are lacking. This longitudinal study examined 207 consecutively treated patients who received, during the past 10 years, 449 Brånemark implants to retain a mandibular hinging overdenture, mainly on a Dolder bar. Clinical parameters and standardized radiographs taken at every recall visit with an interval of 6-12 months were used to judge the implant rigidity in the jawbone, the marginal bone level, and attachment level changes. The cumulative implant failure rate at 9 years was 3%. After loading, implant loss was concentrated during the first 12 months, with only one failure observed at 22 months. A radiographically determined bone loss of 0.7 mm was observed during the first year. From the second year, a mean annual bone loss of 0.05 mm occurred. The attachment loss, calculated as the sum of probing pocket depth plus the recession, was 0.07 mm/year and paralleled the changes in marginal bone level over time. The rigidity of the implant-bone interface revealed an increase over time, as shown by a decrease in Periotest values. The bar-overdenture complications were related to relining (23%), untightening of the retention clip (10%), and renewal of the prosthesis (7%). When magnets or ball attachments were used, more aftercare was needed. Fracture of the antagonistic full denture occurred in 7% of patients. The present data indicate that the mandibular overdenture therapy on two (Brånemark) implants is a very reliable and cost-effective treatment, even in a long-term perspective for the fixed full mandibular prosthesis and especially in elderly patients.

Adult↗
PubMed1993

Adding retentive features in the rebonding of cast metal resin-bonded prostheses.

Many methods have been used to improve retention in resin-retained fixed prostheses, such as electrolytic etching of the retainer, the labial wrap design, proximal grooves, cast pin retention, and the use of improved adhesive resins such as Panavia EX (Kuraray Co, Osaka, Japan). Insufficient retentive features often lead to debonding of resin-retained fixed prostheses. Debonded prostheses may occasionally be recemented and successfully retained by the addition of retentive features to the prosthesis and abutment teeth. When recementing a debonded prosthesis with questionable retention, additional retention may be added to the retentive wings of the prosthesis by using a Rochette retentive hole in combination with pin retention or enamel/dentinal slots in the abutment teeth.

Dental Pins↗