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At least 361 records · Page 20Linked to original sources
PubMed1992

Comparative implant research in dogs: a prosthodontic model.

One-hundred twenty endosteal dental implants were inserted bilaterally in the mandibles of 30 adult mongrel dogs after bilateral extraction of all premolars. The 120 implants were evenly divided into one- and two-stage systems and included ceramic and titanium cylindrical root-form implants and titanium blade implants. The research design of this investigation divided the 30 animals into 10 groups of three dogs. This article describes an animal model that is useful in evaluating dental implant designs and compares the results with those from humans. In particular, this article delineates the prosthodontic approach appropriate for this model using one- and two-stage titanium implants. Rexillium alloy fixed prostheses were placed on 32 endosteal implants and 16 natural mandibular molar teeth. The implants and prosthetic components of the Sterio-Oss implant system were used. All prostheses are functional with minimal maintenance. To date, after 1-year of follow-up, none of the implants have been lost and none of the fixed prostheses have required recementation or maintenance other than normal hygiene. Histologic and survival data as well as results with other implant systems will be presented in other reports.

Animals↗
PubMed1993

Biocompatibility: its future in prosthodontic research.

The future of prosthodontic research will involve replacing lost tissues by using scientific methods that evaluate biomaterials and treatment designs based on desired biologic outcomes. The present concept of a biocompatible material is one that elicits an appropriate host response in a specific application. To design optimal biomaterials, three interactive components should be considered: the chemical nature of the surface, the mediating pellicle layer, and microbial and host response. Surface chemistry determines which molecules are selectively absorbed onto a surface from oral fluids. The pellicle-coated surface should be designed to elicit a more desirable host response. Pellicle composition can be altered by chemically changing the surface, precoating surfaces with biological molecules, or using synthetic materials designed to mimic natural tissues. Several surface-sensitive techniques are available to assess these modifications, including vibrational spectroscopy, electron microscopy for chemical analysis, and bioanalytical methods. To develop more biocompatible materials, a further understanding of pellicle formation as a function of surface composition, microbial adhesion to biomaterials, and cellular reaction to implant biomaterials is necessary. This knowledge will facilitate development of new biologically based rationales for treatment modalities in restorative dentistry.

Biocompatible Materials↗
PubMed1993

Comparison of the performance on prosthodontic criteria of several alternative alloys used for fixed crown and partial denture restorations: Department of Veterans Affairs Cooperative Studies project 147.

In a 10-year, multicenter, double-blind clinical trial, comparisons of the clinical behavior of crown and fixed partial denture restorations were made between a gold alloy and four less costly alternative alloys. The endpoints of interest were (1) the development of unacceptable ratings on any of 11 individual prosthodontic criteria and an overall rating, (2) the removal of the restoration, and (3) an event combining unacceptable overall rating and restoration removal. Each of 630 patients had two restorations completed, one from gold-palladium alloy and the other from one of four alternative alloys. The patients were enrolled during a period of 3 1/2 years, with some patients followed up as long as 10 years after restoration. Analysis of the endpoints showed that one of the alternative alloys was significantly poorer than the other materials for certain criteria.

Adult↗
PubMed1994

Biocompatibility of visible light-cured resin systems in prosthodontics.

Frequently dental products are introduced that have had little or no biologic testing. Cell culture systems that traditionally have been used for the study of cellular responses have recently been used to assess biocompatibility. This article reviews various cellular toxicity assays and their application to the resin systems used in clinical prosthodontics.

Acrylic Resins↗
PubMed1994

Clinical epidemiologic concerns and the geriatric prosthodontic patient.

Investigations of the oral health of the elderly leave little doubt that disease and dysfunction are plentiful, although there is some debate on how the clinical observations translate into treatment needs. The problems appear to be greatest among the disabled and the institutionalized, whereas dentists generally show little enthusiasm for offering their services outside the confines of the traditional dental practice. Consequently the oral health concerns in the older population, and especially as they relate to prosthodontic treatment, remain substantially unanswered.

Aged↗
PubMed2004

The use of lasers in fixed prosthodontics.

The delivery of fixed prosthodontics demands of the clinician a responsible level of skill, accuracy, and predictability commensurate with previous experience and ability. The patient often demands speed and cosmetics. The appropriate employment of laser wavelengths, when indicated and supported by scientific evidence, can enhance the applicable factors favorable to the clinician and patient.

Adult↗
PubMed2004

Prosthodontic application for implant carriers.

This article describes and illustrates clinical and laboratory prosthodontic procedures for the use of an implant carrier as surgical guide, positional index, impression coping, verification device, provisional abutment, implant-supported record base, and occlusal registration stop.

Dental Abutments↗
PubMed2005

A clinical trial of patient satisfaction and prosthodontic needs with ball and bar attachments for implant-retained complete overdentures: three-year results.

STATEMENT OF PROBLEM: Few prospective trials of implant-retained mandibular dentures have evaluated the increase and duration of patient satisfaction, costs of denture maintenance in relation to different methods of attaching overdentures to implants, or the use of a reinforced framework. PURPOSE: This report evaluates subjects' satisfaction and prosthodontic maintenance during a 3-year randomized clinical trial of implant-retained mandibular complete dentures, whether reinforced or not with a cast framework, and attached by bar-clip or 2.25-mm ball-spring matrices to endosteal dental implants. MATERIALS AND METHODS: One hundred edentulous subjects, each having at least 1 year's experience with conventional complete dentures, were selected from respondents to a university dental clinic's request for volunteers. Candidates were examined to verify adequate mandibular bone and medical suitability for implants. Subjects then received 2 implants in the anterior mandible before being stratified by mandibular bone height and gender and assigned randomly to 1 of 4 treatment groups. Every subject received a new maxillary complete denture in addition to an implant-supported mandibular complete denture, with or without a reinforcing framework, connected to implants by either a bar-clip or a ball-spring patrix and matrix. The dentures were adjusted and repaired as needed. Subjects indicated on a visual analogue scale (VAS) satisfaction with conventional dentures prior to the study and then with new dentures at 1 month, 1 year, and 2 years. The results reported here are from the first 68 subjects observed for 3 years after receiving new dentures (19 subjects received new dentures less than 3 years before this analysis, and another 13 subjects were lost to follow-up). VAS scores are presented in simple tables and graphs, and results for different groups were compared using 2-sided nonparametric rank tests and repeated measures ANOVA. With respect to costs and maintenance, t tests were used to compare group means. Sample size and other design considerations used a .05 significance level. RESULTS: After receiving new dentures with mandibular implant supports, improved satisfaction "within subject" was prompt, durable, substantial, and statistically significant, regardless of the attachment mechanism, and with or without a reinforcing framework. In contrast, there were no notable satisfaction differences between the 2 attachment mechanisms, or with the presence or absence of a reinforcing framework, either at specific intervals after receiving the new dentures, or in repeated measures ANOVA. For both attachment groups, most denture adjustments occurred during the first year. This accounted for 81% of total adjustments during 3 years, when the 34 subjects in the ball-spring group and the 34 in the bar-clip group were combined. The mean numbers of adjustments per subject and associated clinical times did not differ significantly between the 2 groups. Conversely, denture repairs declined more slowly than adjustments. Almost all repairs (90%) occurred in the ball-spring group to correct problems with the attachments, 39% in the first year, and tapering off only slightly in the following 2 years. Over 3 years of follow-up, mean numbers of repairs per subject differed significantly between groups: 6.7 repairs per person in the ball-spring group, compared to 0.8 in the bar-clip group ( P<.001), and mean time per appointment was greater for repairs in the ball-spring group: 18.9 minutes compared to 16.9 ( P<.01). The cast framework had no influence on the satisfaction expressed or on adjustments and repairs. CONCLUSION: Subjects were very satisfied with the new dentures, although the ball-spring attachment tested in this trial required substantially more repairs.

Analysis of Variance↗
PubMed2006

Prosthodontic treatment of a patient with hemimandibular elongation: a clinical report.

This clinical report describes prosthodontic treatment of a patient with hemimandibular elongation that resulted in significant dentofacial asymmetry. A maxillary metal-ceramic fixed dental prosthesis and crowns were fabricated. To eliminate the negative horizontal overlap, 3 mandibular teeth were reduced to the gingival level. The mandibular prosthetic restoration was completed with metal and composite resin using an electroforming technique.

Adult↗
PubMed1989

Principles governing the prosthodontic treatment of patients with cardiac transplants.

As the survival rate of patients with cardiac transplants improves, it is more likely that dentists will have to provide extensive dental care and it is important to know the special precautions that must be taken when treating these patients. In this report on the prosthodontic treatment of a patient with a cardiac transplant and an unstable medical history, specific dental management guidelines are proposed. The treatment illustrates an alternative to complex and prolonged restorative treatment for patients with compromised post-transplant recovery.

Anti-Bacterial Agents↗
PubMed2003

Surgical and prosthodontic rehabilitation for a patient with aggressive florid cemento-osseous dysplasia: a clinical report.

Florid cemento-osseous dysplasia is an extensive form of periapical cemental dysplasia, which usually involves 1 to 4 posterior areas of the maxilla and mandible. The affected area undergoes changes from normal vascular bone into an avascular cementum-like lesion. The lesion is usually benign; however, treatment of a secondary infection of this lesion can be difficult and complicated. This clinical report describes a rare but aggressive secondary infection of this type, which was successfully treated by a combination of complex surgical and prosthodontic procedures, including dental implant therapy.

Bone Plates↗
PubMed1995

A procedure for making fixed prosthodontic impressions with the use of preformed crown shells.

Void-free impressions of tooth preparations for fixed prosthodontics are essential for accurately fitting restorations; however, commonly used impression methods are arduous and time-consuming. A procedure has been developed in which an impression is made in a preformed temporary crown shell for each tooth preparation and then a final over impression is made. The result is an atraumatic and uncomplicated complete-arch impression that incorporates an accurate impression of each prepared tooth.

Crowns↗
PubMed1982

In vitro tarnish measurements on fixed prosthodontic alloys.

This presentation describes a battery of quantitative in vitro tarnish tests for cast dental alloys. Eleven commercial alloys representing the available nobility range in precious fixed prosthodontic alloys were used to establish typical responses to the tests. Below approximately 55 at.% noble metal content, microstructure plays a dominant role in determining tarnish resistance. Thus, through proper alloy design and heat treatment, low nobility alloys can be designed with acceptably low tarnish susceptibility. The availability of these quantitative tests will allow determination of relative tarnish resistance and aid in establishing criteria for dental alloys. Furthermore, the data and test criteria developed in this study will provide a method for comparing alloys and designing improved lower cost alloys.

Ammonium Sulfate↗
PubMed1983

Surgical and prosthodontic reconstruction of the severely handicapped edentulous patient.

There is among some prosthodontists a negative attitude toward preprosthetic reconstructive surgery because of previous poor experience with reconstructive or preprosthetic surgical procedures. Such experiences may have resulted from the limitations of techniques previously used; and, therefore, the prosthodontist may resort to conventional prosthodontic techniques. There are, however, limits to what can be achieved with special impression techniques, tooth form and placement, and so forth. This article was written not only to present the rationale of current techniques but to encourage the prosthodontist to consider and present to the severely handicapped edentulous patient the choice of preprosthetic reconstructive surgery.

Alveolar Process↗
PubMed1996

Resin-bonded fixed partial dentures. II. Clinical findings related to prosthodontic characteristics after approximately 10 years.

A clinical study was conducted for patients who were functioning with resin-bonded fixed partial dentures for approximately 10 years. The purpose of this study was to evaluate the periodontal health and determine the prosthodontic characteristics of the fixed partial dentures. Results indicated that plaque indexes, probing, recession, and loss of attachment were greater for abutments than for control teeth. The differences were statistically significant but clinically small. The bonded restorations were generally well adapted and contoured for case of cleaning.

Chi-Square Distribution↗
PubMed1998

Prosthodontic profiles relating to economic status, social network, and social support in an elderly population living independently in Canada.

STATEMENT OF PROBLEM: Previous evaluations of life satisfaction and health have not completely explained the impact of social network, social support, and economics on the oral health-related behavior of elderly patients, particularly in relation to missing teeth. PURPOSE: This study measured the strength of associations between social network/support/class and the use of complete and removable partial dentures in elderly patients living independently. MATERIAL AND METHODS: A multiple stepwise logistic regression was used to contrast data from previous studies relating to the subject and to explore the influence of these social variables. RESULTS: The results substantiated the links observed in a previous study between some social features and oral fitness. More frequent use of complete dentures was identified among participants who reported higher incomes and among those who thought their incomes were sufficient for their needs. Unreplaced missing anterior teeth were associated more commonly with subjects less willing or able to leave their homes. CONCLUSIONS: Some salient features of prosthodontic care and oral health status were common to 2, comparable social environments. A minority within the elderly population may not see a need to make use of clinical dental services, regardless of how accessible these services are to them. Social network and social support issues may be important determinants in this perceived need to use clinical services.

Activities of Daily Living↗