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PubMed1994

Fixed prosthodontic failure. A review and discussion of important aspects.

In order to justify the time and expense involved in complex restorative treatment there is an expectation of a favourable result and long-term success. Longevity in fixed prosthodontics is not only dependent upon the precision and skill with which the work is carried out, but also to a large degree upon a proper assessment and diagnosis and the utilization and implementation of valid principles of design. This paper reviews the literature in an attempt to determine the incidence of failure and the reasons for, and types of, failures that occur. There is a consideration of some factors important in preoperative assessment and a detailed discussion of various aspects of design for fixed prosthodontic restorations.

Crowns↗
PubMed1995

Fixed prosthodontics--state of the art.

Fixed prosthodontics has increased in need and demand significantly over the past 40 years. This increase is related to an ageing population with more teeth retained. Diagnosis and treatment planning is more complex and requires help from qualified auxiliary persons to educate an older population, many of whom have not had major oral treatment in the past. Building-up teeth is necessary for many, and bonded composite and amalgam are commonly used. Prefabricated posts and cores comprise a growing majority of restorations when such therapy is needed. Bonded resin cement, holding titanium or titanium alloy posts, and supporting composite cores are very popular. Proper tissue management provides excellent impressions. Pre-operative anti-inflammatory rinses, and the double-cord tissue management technique, can provide excellent impressions. Addition reaction silicones are often the impression materials of choice. Dentists are encouraged to use all types of crowns including metal, porcelain-fused-to-metal, and all-ceramic. Glass ionomer cements are used most frequently, but hybrid glass ionomers are challenging actively and may eventually replace straight glass ionomers. Fixed prosthodontics deserves increasing dental and continuing education time because of the increased need.

Crowns↗
PubMed2003

The comparison of wear characteristics of prosthodontic restorative materials.

AIM: To assess the mutual wear characteristics of various prosthodontic restorative materials. MATERIALS AND METHODS: Samples were prepared using base metal alloy, ceramics and aesthetic methyl metacrylate resin materials in cylinders with a diameter of 30 mm, height 4 mm, and a spherical shape with a diameter of 5 mm and length of 6 mm. The mutual wearing process of samples on each other in groups was tested using a pin-on disc wear tester machine. RESULTS: The data obtained were evaluated by means of variance analysis and T-test. It was determined that the percentages of the mutual wearing of the restorative materials were statistically significant (p<0.001), but whether the samples were in the upper or lower position had no statistical significance. CONCLUSION: Various prosthodontic restorative materials had wear characteristics affecting each other.

Analysis of Variance↗
PubMed1999

The influence of alveolar bone grafting on the orthodontic and prosthodontic treatment of patients with cleft lip and palate.

The introduction of mixed dentition bone grafting of alveolar clefts means that the alveolar process can be fully restored, permitting adjacent teeth to migrate or be orthodontically moved into the grafted bone. Thus a complete dental arch can be obtained without prosthodontics in the great majority of patients. In addition, oral-nasal fistulae are closed, mucosal recesses eliminated (facilitating oral hygiene) and the long-term periodontal health of the teeth adjacent to the former cleft is improved. Alveolar bone grafting with subsequent orthodontic treatment, together with advances in dental materials, have contributed substantially to the care of patients with alveolar clefts, reducing the need for prosthodontic procedures and allowing completion of the dental treatment at an earlier age.

Alveolar Ridge Augmentation↗
PubMed1983

Prosthodontic considerations for patients undergoing cancer chemotherapy.

Dentures for the patient receiving cancer chemotherapy must be constructed and maintained carefully, using sound basic principles of denture construction and tissue management inherent in the highest level of prosthodontic treatment. The objective of removable prosthodontic therapy is to improve the patient's quality of life, enhance nutrition by reducing oral irritation and ulceration, and control the oral microbial populations associated with chemotherapy and the wearing of a denture.

Antineoplastic Agents↗
PubMed1990

Implant prosthodontics contribute to restorative dentistry.

This paper is directed toward dental practitioners who accomplish the prosthodontic procedures for dental implants. It includes a discussion of most of the major steps in current implant dentistry. Several implant systems are compared with a look at the future of implant prosthodontics.

Dental Implantation, Endosseous↗
PubMed1997

An update on fixed prosthodontics.

The practice of fixed prosthodontics has continually evolved as a result of progress in laboratory and biomaterials science, clinical technologies and adjunctive multidisciplinary treatment advancements. This brief review describes those enhancements and how they affect the state-of-the-art practice of fixed prosthodontics.

Dental Abutments↗
PubMed2003

Have fixed-prosthodontic impressions become easier?

Excellent fixed-prosthodontic impressions are ensured with the presence of healthy soft tissue, atraumatic tooth and soft-tissue preparation, use of packing cords when indicated, routine use of astringents and taking enough time to accomplish the preimpression procedures thoroughly. Currently advertised products that supposedly eliminate the difficulty of fixed-prosthodontic impressions and the need for cords have decreased some of the frustrations of impression making, but the challenge remains. Excellent impressions require accurate and stable impression materials, time, conscientious and thorough techniques, attention to every detail, good support staff and a working knowledge of all aspects of the concepts involved.

Dental Impression Materials↗
PubMed2004

Improving quality and speed in providing fixed prosthodontics.

American dentists should be pleased with the level of care they provide to their patients in the area of fixed prosthodontics. The American public is served with good, competent care at a moderate cost. However, this article has addressed the potential for increasing the quality level of care, increasing the speed of treatment and maintaining the moderate cost by delegating some of the clinical tasks to qualified staff members. In my opinion and experience, these results are achievable by delegating up to one-half of the time involved in fixed prosthodontic clinical tasks to qualified, educated, supervised non-dentist staff members, where such delegation is legal.

Crowns↗
PubMed2004

A case of oculo-facio-cardio-dental syndrome with integrated orthodontic-prosthodontic treatment.

OBJECTIVE: Oculo-facio-cardio-dental (OFCD) syndrome is a very rare condition that requires comprehensive dental management because of associated multiple dental anomalies such as canine radiculomegaly, delayed dentition, oligodontia, persistent primary teeth, microdontia, and macrodontia. This report presents a case of OFCD in a Japanese girl (13 years 1 month old). We analyzed cephalograms, panoramic roentgenograms, and dental casts and discuss our integrated orthodontic-prosthodontic treatment. DESIGN: The sizes of the tooth crown and root as well as lateral cephalograms were compared with those from a Japanese control group. The outcome of orthodontic treatment was evaluated by comparing cephalograms taken before and after treatment. RESULTS: Radiculomegaly was found not only in the upper and lower canines but also the upper central incisors and lower first premolars. Macrodontia was found in the upper central incisors, upper canines, lower canines, and lower first premolars. Microdontia was found in the upper lateral incisor. Lateral cephalometric analysis showed a remarkable hypoplastic midface in both the sagittal and vertical dimensions, coupled with a significantly decreased cranial base length and an increased gonial angle. Serial lateral cephalograms during orthodontic treatment from 13 to 23 years of age demonstrated only slight maxillary growth and significant downward mandibular growth with clockwise rotation in addition to pronounced labial tipping of the upper central incisors. CONCLUSIONS: Characteristic dental anomalies together with a unique craniofacial dysmorphology were clarified. Successful oral rehabilitation was achieved by integrated orthodontic-prosthodontic treatment.

Abnormalities, Multiple↗
PubMed2004

[The effectiveness of prosthodontic mandibular advancement for obstructive sleep apnea syndrome].

PURPOSE: This study investigated the hypothesis of a direct association between the shift of incisal point and the diameter of the oropharynx space, and nocturnal oximetry with and without prosthodontic mandibular advancement (PMA) which is one type of oral appliance used to treat obstructive sleep apnea syndrome (OSAS), and to indicate the effects of PMA. METHODS: A total of 19 patients with OSAS were subjected to finger pulse oximetry recording and lateral cephalometric radiography: with and without PMA. The distance of the oropharynx space (PNS-AS, SPAS, MAS, and IAS) and the shift of incisal point with PMA were measured. The oxygen desaturation index (ODI 4%) and the cumulative percentages of time spent at saturations below 90% (CT(90)) during sleeping were calculated. Spearman's rank correlation test was used to measure the relationship between the increase of the velopharyngeal space and the distance of the mandible. The ODI 4%, CT(90) and distance of the velopharyngeal space were compared for all subjects with and without PMA by Wilcoxon's linking test. RESULTS: There was a strong relationship between the increase of the lower part (IAS) and the distance of anterior shift of incisal point (r=0.61, p=0.01). ODI 4% and CT(90) significantly decreased (p<0.01) and the three liners of the oropharynx(SPAS, MAS, IAS) significantly increased with PMA (p<0.01). CONCLUSIONS: It was shown that prosthodontic mandibular advancement could reduce the ODI 4% and CT(90) value in patients with OSAS, by enlarging the oropharynx space.

English Abstract↗
PubMed1990

Fixed restorations produced for recipients of dental prosthodontic treatment. A comparison between general dental practice and a dental school.

Fixed prosthodontic work ordered by general dental practitioners was examined through registrations made in commercial dental laboratories. A comparison was made with similar data from student files on fixed prosthodontic treatment at the University Clinic in Bergen, Norway, which is located in the same geographic area. The results indicated that the distributional pattern of fixed restorations within the dentition was much the same in the individuals attending the general dental practitioners as in those treated at the dental school. While the practicing dentists preferred metal-ceramics in most cases, most of the restorations inserted at the dental school were based on the metal-resin technique.

Crowns↗
PubMed1992

Prosthodontic claims in the Swedish Patient Insurance Scheme.

The Swedish Patient Insurance Scheme includes a guarantee insurance for prosthetic treatment. Retreatments of failures, up to 2 years after cementation of fixed prosthodontics and 1 year after delivery of removable prosthodontics, are covered by the guarantee insurance scheme. Almost all private practitioners were included in this scheme at the time of the study in 1989. During a specific period all claims were studied at the time of reporting, when annexed radiographs and so forth could be analyzed. One hundred and thirty-six claims were recorded with regard to treatment injury, reasons for remake, latency times from cementation or delivery to diagnosis, and details about the teeth or constructions involved in the claim. The dentist's opinion of the cause of the failure was also recorded. The reports covered treatment injuries, most of them root perforations during preparation for a post. The guarantee claims for single crowns concerned porcelain fractures, loss of retention, and root fractures as the most frequent failures. For fixed partial dentures the failures were recorded as loss of retention, porcelain fractures, tooth or root fractures, and metal framework fractures in that order. The dentist gave information about his/her opinion of the reason for the failure in only 38.5% of the claims. There were, however, no clear findings about the reasons for the failures.

Crowns↗
PubMed1998

Evaluation of prosthodontic treatment by occlusal force distribution: a methodological study.

This study describes a new method to apply bite force measurement as an objective evaluation prosthodontic treatment. The occlusal load centre, i.e. the centre of balance of distributed occlusal force on the dentition is used as an index of bite force. The digitised image of the occlusal load centre was superimposed on the digitised image of a standardised maxillary cast. The measurement error for superimposition was small and the method was found to be useful to record and store an objective evaluation of prosthodontic treatment and masticatory function.

Adult↗
PubMed1997

[Determination on the electric-mate order of prosthodontic materials in artificial saliva].

Electric-mate corrosion of the different prosthodontic materials has been noticed in oral cavity. The aim of this investigation was to determine corrosion potential of prosthodontic materials, and to acquire the electric-mate order in artificial saliva. That will conduct us to select the materials of resistance corrosion. For resistance electric-mate corrosion, it's better to use same materials, or to use close materials of the electric-mate order.

Chromium Alloys↗
PubMedDate not supplied

Brånemark Novum: prosthodontic and dental laboratory procedures for fabrication of a fixed prosthesis on the day of surgery.

PURPOSE: The purpose of this report is to describe a new technique to fabricate and deliver an implant-supported fixed prosthesis to the patient on the day of surgery, and to propose a protocol for the prosthodontic and dental laboratory procedures. MATERIALS AND METHODS: The development of the Brånemark Novum prosthodontic protocol is reviewed, and clinical and dental laboratory assessments and methods are described. RESULTS: The total treatment time to fabricate a permanent implant-supported fixed prosthesis in the mandible can be reduced to 1 day with the Brånemark Novum technique. The new method includes a precise surgical technique using drilling templates for predetermined implant positions, a rigid splinting of the implants immediately after placement, the use of a prefabricated titanium framework, and elimination of implant impression procedures. CONCLUSION: With the technique described in this report, it is possible to provide patients with a permanent implant-supported fixed prosthesis in the mandible on the day of implant surgery. Patient benefits are obvious, with drastically reduced total treatment time, lower cost, and fewer clinical visits.

Dental Implantation, Endosseous↗
PubMed2002

Implant prosthodontic management of anterior partial edentulism: long-term follow-up of a prospective study.

OBJECTIVE: This paper reports on the long-term outcome of patients with Kennedy Class IV partial edentulism treated in the Implant Prosthodontic Unit (IPU) at the University of Toronto, Toronto, Ontario. METHODS: The information for this paper was gathered from the charts of the first 30 consecutive, partially edentulous patients treated at the IPU. These patients all had Class IV edentulism and formed part of the original prospective clinical studies that were initiated in 1983. The patients' dental history suggested maladaptive experiences with traditional removable prostheses or a reluctance to have intact or quasi-intact teeth prepared as retainers for fixed prostheses. Fifteen men and 15 women treated with 94 Br nemark dental implants, supporting 34 prostheses, were followed until June 2000 (25 patients) or until they were lost to follow-up (5 patients). The multiple missing teeth occurred in 19 maxillae and 15 mandibles. RESULTS: The original prosthodontic treatments were intended to result in 33 fixed partial prostheses and 1 overdenture. At the time of this report, 25 patients with 86 implants supporting 31 fixed prostheses and 3 overdentures had been followed for an average of 12 years (range 7 16 years). The overall survival of implants was 92%. The difference between men (94%) and women (89%) was not statistically significant. CONCLUSIONS: This report is an interim update on an ongoing long-term prospective study. The results so far demonstrate a high survival rate for Br nemark implants supporting tissue-integrated prostheses for the management of anterior partial edentulism.

Adolescent↗