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At least 271 records · Page 15Linked to original sources
PubMedDate not supplied

Stress fatigue: basic principles and prosthodontic implications.

Clinical evidence indicates that the majority of fractures that occur in prosthodontic structures do so after a period of many years. Such failures generally are not related to an episode of acute overload but result from fatigue failure. This paper reviews the current knowledge of fatigue failure and test methods. An overview of published studies is given, and the authors suggest guidelines for future prosthodontic studies of this nature.

Chemical Phenomena↗
PubMed1995

The clinical significance of distortion in implant prosthodontics: is there such a thing as passive fit?

Passive fit of the implant prosthesis onto osseointegrated and functional fixtures intraorally is the "Holy Grail" of the discerning implant prosthodontist. There is growing recognition that the old and "tried" clinical procedures and laboratory fabrication methods transferred from traditional fixed and removable partial denture prosthodontics, fall short of achieving true passivity of fit. The stages of impression making, master cast, resin verification jig, waxing, investing, casting, veneer addition and finishing can all add to the final distortion of the prosthesis. Studies are emerging that report the possible distortion associated with each stage. Alternative strategies have also been suggested to by-pass these traditional stages, for example laser welding or the elimination of the impression using optical digitising and CAD-CAM. In the final analysis, totally "passive" fit is probably unachievable. The challenge is to determine a minimum level of distortion and associated stress that is acceptable and that confers adequate clinical longevity to the prosthesis. Developing clinical tests that measure stress levels intraorally as the prosthesis is fitted would be the ideal gold standard by which to judge the accuracy of fabrication procedures. This paper summarises and rationalises the growing body of literature dealing with accuracy of implant prosthodontic procedures.

Biomechanical Phenomena↗
PubMed1994

Implant prosthodontic procedures for a completely edentulous patient with cleft palate.

Prosthodontic treatment of the edentulous cleft palate patient presents the dentist with numerous challenges for achieving a satisfactory result for the patient. A technique is described for prosthodontic rehabilitation of a completely edentulous cleft palate patient using bone augmentation procedures, root-form dental implants, and a removable maxillofacial prosthesis. Dental implants may improve prosthesis retention, stability, and occlusal function when used in carefully selected cases.

Adult↗
PubMedDate not supplied

Prosthodontic complications in osseointegrated dental implant treatment.

Complications were recorded in consecutive patients with osseointegrated implant-supported prostheses visiting prosthodontic specialist clinics during October and November 1991. Patients at regular follow-ups and emergency visits were included. Of the 600 prostheses examined, 28% needed some prosthodontic treatment. Complications varied widely--from simple adjustment to complete remaking of the prosthesis. The most common complications observed were related to the acrylic resin part of the prostheses. The frequency was higher in maxillary than in mandibular prostheses, and in full-arch removable and fixed prostheses than in single-tooth replacements and fixed partial dentures. Implant losses were rare (0.3% of all 2,709 implants placed) and occurred in 1% of the patients examined.

Adolescent↗
PubMed1996

Titanium for prosthodontic applications: a review of the literature.

Titanium has become a material of great interest in prosthodontics in recent years. A growing trend involves the use of titanium as an economical and biocompatible replacement for existing alloys for fixed and removable prostheses. However, long-term results of titanium casting, joining, and porcelain bonding have to be evaluated before this wonder metal can be used routinely in clinical dentistry. This article describes the development and properties of titanium and reviews the literature related to the use of titanium in prosthodontics, for the purpose of evaluating the present status and future trends in its use.

Chromium Alloys↗
PubMedDate not supplied

Changes of masticatory movement characteristics after prosthodontic rehabilitation of individuals with extensive tooth wear.

The masticatory cycles of 11 men (mean age 51.5 years) with extensive tooth wear were investigated before and after rehabilitation with fixed partial dentures. Parameters such as the tooth wear index (IA) and masticatory mandibular movement were recorded. Before treatment, the patients were also given a questionnaire related to possible background factors of importance to tooth wear. At baseline a mean score of 48.6 (range 0 to 100) for the tooth wear index (IA) was found. The clinical recall examination 3 years after prosthodontic rehabilitation displayed obvious wear of restorative material for two patients, and, in another patient, one of the fixed partial dentures had to be remade because of fracture of abutment teeth. Following rehabilitation, the duration of the masticatory mandibular opening movement increased and mandibular movement velocity decreased. The mandibular closing angle, near to occlusal contact, became steeper after prosthodontic treatment, indicating a changed mandibular movement pattern.

Adult↗
PubMed1997

Prosthodontic considerations for the older patient.

The elderly have both the greatest level of need for prosthodontic services of any age group, and the greatest degree of complicating dental, medical, and behavioral factors. Issues arise in daily practice of whether or not to replace a missing tooth or teeth for a patient of advanced age and a wide variety of challenges-dental/oral and others-face the dentist who is considering replacing some or all of an older person's teeth. This article focuses on clinical approaches and techniques that have proven particularly important and useful for providing prosthodontic care to the older adult.

Adult↗
PubMedDate not supplied

Post and core reconstruction for fixed prosthodontic restoration.

If the previous restorative therapy or dental caries has resulted in substantial loss of tooth structure, the abutment teeth for fixed prosthodontic restorations require a core reconstruction or a post and core. Small dentin defects can be restored with bonded cores; more extensive dentin defects that are often accompanied by previous endodontic treatment generally require additional support for the core material. A direct procedure with a bonded post is a viable treatment method. The decision to use either light-conducting all-ceramic zirconium or titanium as a post material depends on the aesthetic requirements present. The indications for a cast post and core as an indirect procedure for prosthodontic reconstructions appear to be decreasing. The learning objective of this article is to review the past and current post and core materials and techniques. Indications for core reconstruction with vital teeth and posts and cores for pulpless teeth are discussed.

Aged↗
PubMed1998

Vertical dimension and freeway space in implant prosthodontics: components of macroaesthetics.

The concept of prosthesis-directed implant-supported restorations in now fully recognized, increasing the importance of prosthodontics in the initial treatment planning. This article reviews the role of prosthodontics in planning and execution of the restoration, with focus on the vertical dimension and freeway space--the major components of macroaesthetics. The signs of ridge resorption and ridge extrusion are identified, and the methods of ridge correction are presented, including alveolectomy prior to fabrication of the prosthesis and the adjustment of the abutment height to the modified ridge.

Alveolectomy↗
PubMed2000

Improving the quality of fixed prosthodontic services.

I have discussed only the three problems most frequently mentioned by laboratory technicians in the Lab Management Today survey. In my opinion, there are many more areas in fixed prosthodontics that need attention. To achieve this, we must improve the quality of the procedures we use in creating fixed prostheses. Laboratory technicians observe the quality of impressions, tooth preparations and interocclusal records that are sent to them by the dentists with whom they work. Their statements about the need for improvement on several of the aspects of the clinical procedure are of concern. It is dentists' professional responsibility to upgrade their clinical techniques so that they produce high-quality impressions of adequate tooth preparations and transfer information about the proper interocclusal relationship to the dental technician.

Dental Impression Technique↗
PubMed1976

In-service teacher training in removable prosthodontics.

A partial review of educational literature with respect to in-service education has been presented. The design and evaluation of an in-service teacher training or staff development program in removable prosthodontics have been described. Measurement instruments necessary for the program were also included. In such a program, various educational principles and methodology are presented to dental faculty members who, for the most part, have never before had this type of training.

California↗
PubMed1977

Prosthodontic techniques and the timing of complete denture procedures--a survey.

This survey has attempted to show some of the differences in techniques and materials used by three groups of dentists involved in prosthodontic work in the United States. Some contrasting features between dentistry performed by the NHS and that in the United States have been illustrated, but fair comparisons between the two systems could not be made because of the basic difference in the number of patients and completed treatments and the fee schedules.

Dental Impression Technique↗
PubMed1978

Performance criteria in preclinical denture prosthodontics.

This article has reported on a preliminary study of selected criteria used by The University of Michigan, School of Dentistry Complete Denture Department. Self-evaluation opportunities by students and assessment of performance by instructors using objective criteria have been developed for each phase of complete denture prosthodontics and placed within a text illustrating methods to reach the desired standards. Agreement between all evaluations of the selected criteria studied occurred on 75% of the responses, while agreement by instructors experienced with criteria evaluations occurred on 81%. Further, extensive study into quality assessment must be initiated within the educational setting before valid and reliable criteria can be developed for the private sector. Additional research will be critical to peer-review mechanisms which attempt to be more than grievance committees.

Acrylic Resins↗
PubMed1985

An evaluation system for teaching clinical removable prosthodontics.

The continuous assessment and updating of clinical evaluations are integral aspects of dental education. The purpose of this article was to describe the development, implementation, and assessment of an evaluation system for clinical removable prosthodontics. A system based on a three-point scale (RST) was adopted and implemented with the intent of maximizing evaluation effectiveness while minimizing stress on students and faculty members. To date, the RST system has improved both the quality of clinical evaluation and the level of clinical learning. The RST clinical evaluation system appears to be defusing students' ardent quests for grades while promoting the teaching potential within the evaluation process. The system also stimulates student self-evaluation, improves the consistency of faculty grading, facilitates student counseling, and permits an in-depth analysis of the evaluation system at regular intervals.

Clinical Competence↗
PubMed1987

Perceived or actual overlap between the scope of prosthodontics and other recognized dental specialties.

Prosthodontics does not overlap with other specialties but is integrated with them. This essential difference between "overlap" and "integration" should be made abundantly clear. No one denies that most of the population's dental needs must be served by the general practitioner, and no specialist can be completely capable within even his or her own specialty. Nevertheless, the prosthodontist, as all specialists, must assume the role of treating patients who require unusual care. It is the prosthodontist who most frequently assumes the primary role in the management of patients who require complex, demanding restorative care, and it is the prosthodontist who has the most intimate understanding of the proper diagnosis, treatment planning, integration of therapy, patient management, and aftercare for these patients.

Attitude of Health Personnel↗
PubMed1992

Evaluation of the accuracy of cast reorientation to a surveyor by prosthodontic residents.

This study investigated the accuracy of a group of evaluators in reestablishing the orientation of a tripoded master cast to a surveyor instrument. Three prosthodontic residents served as evaluators to reestablish the tilt of a previously tripoded cast with three known reference coordinates. The distance from the known to the reference point was recorded for the three points in four trials by a judge with a machinist height gauge. Analysis of variance revealed a significant difference between the evaluator cast position and the known reference position. The investigation demonstrated +/- 0.2 mm errors at each of the three locations; 0.3-degree angulation errors occurred in reestablishing the tilt of the master cast in relation to the surveyor.

Analysis of Variance↗
PubMed1993

Prosthodontic treatment activities in the Canadian Forces Dental Services.

Prosthetic treatment activities and dental laboratory support are profiled to characterize the influence that a structured, publicly funded military program has on the delivery and practice of prosthetic dentistry. Changing oral health trends and advances in techniques and materials have had quantitative and qualitative impacts on the practice of prosthodontics in the Canadian Forces Dental Services over the past 25 years.

Canada↗
PubMed1993

Prosthodontic management of temporomandibular disorders and orofacial pain.

Guidelines for advanced education in prosthodontics describe specific competency levels. The complex nature of temporomandibular disorders (TMD) and oral facial pain requires a multidisciplinary team. However, the multifactorial nature of this malady places some aspects of this disease beyond the traditional education of a prosthodontist. The management goals for the prosthodontist as a member of a TMD team are patient comfort, occlusal stability, and/or the complex restoration of teeth.

Dental Prosthesis↗