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At least 307 records · Page 17Linked to original sources
PubMed1987

Endodontic and restorative management of a resorbed eight-unit fixed partial denture abutment tooth: report of case.

Treating internal resorption is one of dentistry's most difficult challenges. This pathological process is difficult to manage in an advanced stage. The usual treatment involves surgery or, in many cases, extraction of the resorbed tooth. It is often difficult for the patient to understand and accept such a radical treatment approach. This report of case illustrates severe internal resorption that destroyed a major portion of a key abutment tooth supporting an eight-unit fixed partial denture. The resorptive pathosis was treated by a nonsurgical endodontic approach. The severely damaged abutment was reinforced and restored so that the existing eight-unit fixed partial denture could be preserved. The patient was pleased with the method of treatment and was commended for seeking regular recall professional care. It would have been easy to postpone treatment as the problem was asymptomatic. However, to do so probably would have resulted in loss of the resorbed abutment tooth, thus creating a complex restorative situation. The original prosthesis is currently 14 years old, functioning well, and showing no apparent evidence of pathosis. Costly and time-consuming remake procedures were avoided and patient satisfaction was maintained.

Dental Abutments↗
PubMed1991

A comparison of impression materials for complete-arch fixed partial dentures.

This study compared the marginal fit of complete-arch fixed prostheses under simulated clinical conditions. Prostheses were made on casts constructed from three commonly used impression materials; polyether, polyvinyl siloxane (medium-viscosity and putty-wash), and reversible hydrocolloid. A maxillary dentoform with four abutment teeth was used as the master cast and six impressions were made with each material. Individual castings for each abutment were made on the stone casts. The abutment castings were luted together on the casts to provide a complete-arch fixed partial denture using a ticonium framework and acrylic resin. The marginal fit of the abutment castings was measured on the master cast before and after the prostheses were luted together. The polyether and both addition silicone impression materials were significantly more accurate than the reversible hydrocolloid in both situations. All of the single castings were clinically acceptable, but the luted restorations made from reversible hydrocolloids were not.

Analysis of Variance↗
PubMedDate not supplied

Two-year clinical trial of resin-bonded fixed partial dentures incorporating novel attachments.

PURPOSE: This controlled clinical trial evaluated the clinical performance of a new resin-bonded fixed partial denture (FPD) system and compared the clinical performance with that of conventional FPDs. MATERIALS AND METHODS: Resin-bonded FPDs replaced 12 single anterior and 9 premolar missing teeth in 20 healthy patients. Conventional three-unit FPDs (metal-ceramic crowns or complete cast-metal crowns) replaced 10 single anterior and 10 single posterior missing teeth in 20 age-matched controls. Retention, marginal integrity, periodontal condition of the FPDs, esthetics and hygiene of pontics, and secondary caries were clinically evaluated immediately, 1 month, and 2 years after cementation. RESULTS: After 2 years, no failure was observed in the resin-bonded or conventional FPDs because of debonding from the abutment teeth. All clinical results evaluated for both groups were satisfactory or acceptable. No secondary caries was found in either group. Fisher's exact test and/or continuity-corrected chi-square test showed no significant differences of satisfactory rates between the resin-bonded and conventional FPDs for all variables evaluated. CONCLUSION: Short-term clinical results indicate that resin-bonded FPDs may be used as fixed prostheses to replace lost single anterior or premolar teeth with minimum preparation of abutment teeth. This restoration did not adversely influence pulpal or periodontal health. However, a 2-year clinical trial for a new FPD can only provide preliminary data, and longer term observations are clearly necessary.

Adult↗
PubMed1990

Hyperostosis and fixed partial denture pontics: report of 16 patients and review of literature.

A total of 19 hyperostoses underlying mandibular posterior fixed partial dentures were observed in 16 patients. In three patients the lesions were bilateral. Histologic examination of hyperostoses from eight patients showed that they were composed essentially of hyperplastic lamellar bone. Radiographic and clinical evidence suggested that subpontic hyperostoses are chronic, slow growing lesions with an exclusive predilection for the mandibular molar-premolar site. They appear to have variable growth rates and attain widely variable maximum size. The etiology of subpontic hyperostoses is unknown, but it is possible that inflammation, trauma, mandibular and occlusal function, and genetic factors, either individually or in combination, play a role in the initiation and development of these lesions. Subpontic hyperostoses have potential periodontal and restorative implications that may require their surgical removal.

Adult↗
PubMed1991

Pin-retained, resin-bonded fixed partial dentures.

This article describes a technique to enhance resistance form in the construction of anterior resin-bonded fixed partial dentures. The technique is simple and conserves tooth structure. It uses a cingulum pin when an opposing axial groove cannot be adequately incorporated into the preparation.

Dental Bonding↗
PubMed1995

Long-term clinical performance of resin-bonded fixed partial dentures placed in a developing country.

PURPOSE: This study assesses the clinical performance of 92 resin-bonded fixed partial dentures (FPDs) placed at four private practices in Karachi, Pakistan, between 1982 and 1991. MATERIALS AND METHODS: The distribution of the FPDs was 9 perforated, 45 electrolytically etched, and 38 silicoated. Twenty-five FPDs replaced anterior teeth and 67 replaced posterior teeth. There were 66 FPDs with single pontics and 26 with multiple pontics. The perforated designs used a restorative composite for cementation, whereas the electrolytically etched and silicoated designs used a composite luting cement. The observation periods for the perforated, electrolytically etched and silicoated FPDs were 114, 99, and 30 months respectively. RESULTS: During the evaluation period, 27 FPDs (29%) failed; of these, 4 were perforated, 18 were electrolytically etched, and 5 were silicoated. The mean (+/-SD) duration of the successful clinical service for all FPDs was 41 +/- 26 months. The mean time to failure for the FPDs that did not survive was 35 +/- 23 months. The silicoated FPDs tended to have early failure, as did the FPDs with multiple pontics and those in the mandibular arch. Anterior and posterior FPDs performed equally well. CONCLUSIONS: These findings, in conjunction with those from Europe and North America, show that resin-bonded FPD technology is as successful in a developing country as in industrialized areas of the world.

Adolescent↗
PubMed2005

Color stability of provisional crown and fixed partial denture resins.

STATEMENT OF PROBLEM: Provisional resins are used extensively during fixed prosthodontic treatment and exhibit varying degrees of color change/discoloration over time. Data are needed to help predict color stability of provisional resins. PURPOSE: The purpose of this in vitro study was to measure the color change of 12 provisional prosthodontic materials after immersion in artificial saliva and artificial saliva-coffee solutions for 1, 2, and 4 weeks. MATERIAL AND METHODS: Twelve provisional materials were studied. Methacrylates consisted of Alike, Jet, Temporary Bridge Resin, Unifast, and Zeta CC. Bis-acryl resins included Instatemp, Integrity, Luxatemp, Protemp Garant, Provipont, Provitec, and Temphase. Ten specimens (25.4 mm x 25.4 mm x 2.4 mm) of each material were fabricated. Five specimens were stored at 37 degrees C in artificial saliva and 5 were stored in a solution of artificial saliva (400 cc) and coffee (800 cc). Baseline color was measured using a colorimeter. Further color measurements were made after 1, 2, and 4 weeks of immersion. CIE L *a *b * values were recorded and color differences (DeltaE) between baseline and each storage interval were calculated using a 2-way ANOVA with Bonferroni adjustment for multiple comparisons in conjunction with an overall alpha=.05. RESULTS: Results indicated the presence of strong interaction between material and storage solution regardless of the aspect of color considered (P<.0001 for DeltaE, DeltaL *, Deltaa *, and Deltab *). Coffee solution relative to saliva solution had the most significant impact on color change for Luxatemp, Protemp, and Temphase materials at 4 weeks, but the greatest overall color change for both coffee and saliva solutions was found for Provipont (DeltaE=9.40 coffee; 8.51 saliva) and the least overall color change for both solutions was found for Zeta CC (DeltaE=0.31 coffee; 0.23 saliva). CONCLUSIONS: Under the conditions of this study, 12 provisional crown and fixed partial denture resins demonstrated varying tendency to discolor over a range of time periods when immersed in artificial saliva and artificial saliva-coffee solutions.

Acrylic Resins↗
PubMed2005

Effects of cantilever design and material on stress distribution in fixed partial dentures--a finite element analysis.

The purpose of this study was to examine the stress distribution in distal cantilevered fixed partial dentures (FPDs) that are designed with different cantilever morphology and made from different restorative materials. The finite element (FE) method was used to create models of two restoration types; metal-ceramic and an all-ceramic FPDs. Both models were designed with distal cantilevers involving the first and second premolars as abutments and cantilever extension involving at the premolar or molar. The width of connector between the cantilever and the primary abutment restoration was 2.25 mm. The load applied during the FE analysis was positioned at the cusp tips of all teeth. The FE analysis of the models revealed that Von Mises stress values with maximum stress concentrations were observed on connectors of distal cantilevers. Stress concentration sites were also observed at the distal cervical area of the second premolar tooth. Models with premolar cantilever extensions restored with all-ceramic induced lower Von Mises stress values than metal-ceramic restorations, however models with molar cantilever extensions restored with all-ceramic restorations induced higher Von Misses stress values than metal-ceramic restorations. If the distal cantilever length and restorative material is appropriately chosen, the failure frequency may be reduced. All ceramic can be used as restorative material, when the cantilevers length is not more than the mesiodistal dimension of a premolar tooth and metal-ceramic restorations can be used in longer situations.

Bicuspid↗
PubMed2006

Loading of bone surrounding implants through three-unit fixed partial denture fixation: a finite-element analysis based on in vitro and in vivo strain measurements.

Implant-borne fixed partial dentures (FPDs), whether cementable or screwable superstructures, ought to display a true passive fit. The objective of this in vivo-based finite-element analysis is, therefore, to quantify the degree of stress which occurs in the bone around the implants as a result of the fixation of cemented and screw-retained FPDs. On the basis of a simulated patient situation with two implants, six groups of implant-supported superstructures containing 10 samples each were fabricated. Strain gauges which were mounted on the pontics of the restorations were subsequently used to take in vivo measurements (Ethics Commission Approval No. 2315). Taking the values obtained as a basis, the von Mises equivalent stress was chosen to illustrate bone loading in three-dimensional finite-element models. Superstructure fixation caused residual interface stress as high as 30 MPa. Similar stress magnitudes can be observed for axial implant loading of 200 N. Assuming that the axial loading of a single implant with 200 N is within the bone's physiological range, it can be concluded that the degree of stress resulting from the fixation of superstructures alone does not constitute a risk.

Cementation↗
PubMed2002

Evaluation of a glass-fiber-reinforced, bonded, inlay-supported fixed partial denture--4-year results.

Glass-fiber-reinforced composite resin systems may be used as conservative alternatives to conventional fixed partial dentures (FPDs) for the replacement of a single missing tooth. This article describes a clinical technique and 4-year evaluation of an inlay bonded FPD. The patient presented with a missing maxillary right second premolar. A high-caries risk and moderate-to-advanced attachment loss around the abutment teeth, which were clinically stable, were noted. The patient had a strong desire to maintain his remaining dentition. Advantages of supragingival margins and minimal tooth structure removal made the bonded inlay bridge a viable alternative to a conventional FPD for this compromised restorative situation. The clinical performance of this glass-fiber-reinforced resin inlay FPD at the 4-year follow-up is provided. The restoration has served satisfactorily for more than 4 years and holds promise as a conservative, esthetic alternative to the conventional FPD in certain clinical cases.

Acid Etching, Dental↗
PubMed2005

Patient satisfaction with fixed partial dentures: a 5-year retrospective study.

OBJECTIVE: The aims of this retrospective study were to evaluate patient satisfaction with fixed partial dentures (FPDs) 5-8 years following placement and to assess their awareness of oral health and oral hygiene practices using a survey questionnaire. METHODS: The questionnaire consisted of 15 statements on patients' subjective perception of treatment with FPDs. Patients' perceptions of clinical outcome in terms of aesthetics, masticatory efficiency, speech, and comfort of the FPD were scored on a 4-point ordinal scale. Another group of questions looked into patients' attitudes regarding oral hygiene measures; these responses were measured on a binary scale. A third group of questions determined patients' awareness of bleeding gingivae, and the final group of questions assessed if patients' expectations had been met, willingness to undergo the same treatment again and recommend it to others. RESULTS: Eighty-five patients with 99 FPDs, treated between 5 and 8 years previously (mean, 6.1 years; median, 6.2 years), participated in the study. Mean follow-up time was 6.1 years. There were 87.9% of FPDs that were 3-4 units in design and 44% included anterior teeth. The 5-year survival of the FPDs was 92.3%. Patient satisfaction with the functional aspects of the FPDs was generally very high; 95% were definitely or somewhat satisfied with the aesthetic appearance, 96% with chewing comfort, and 100% with the ability to speak normally. Ninety-one percent found the costs to be definitely or somewhat reasonable. Ninety-nine percent felt that the treatment had definitely or somewhat turned out as they had expected, 95% would definitely or somewhat be willing to recommend the same treatment to friends, and 92% would undergo the same treatment again. Fifty-six percent of patients reported using some form of interdental aid and 86% reported being able to clean their prostheses without problems. However, 35% reported some bleeding around their prostheses during cleaning, and 74-78% of patients felt that bleeding around natural teeth and bridges during cleaning was only a minor problem or not a problem. CONCLUSION: More than 90% of patients were satisfied with having missing teeth replaced with FPDs from a functional and aesthetic point of view. Costs were considered to be reasonable by the majority of patients and most would undergo the same treatment again and also recommend the treatment to others. Only about half of patients used some form of interdental cleaning and most were unaware of the significance of bleeding around the gingiva of natural teeth and FPDs.

Adult↗
PubMed2005

Achieving optimal esthetics in a patient with severe trauma: using a multidisciplinary approach and an all-ceramic fixed partial denture.

UNLABELLED: The treatment of traumatic injuries can be difficult, especially when the patient's expectations are too high or unreasonable. Such cases require extremely clear communication with the patient before beginning the case, including an explanation of the final results, based on the patient's goals. Taking over a case from another colleague adds more complications and requires that close attention is paid to the reason for the original dissatisfaction between the former dentist and patient to avoid repeating the same mistakes. Clinically, patients with thin, fragile gingiva are extremely challenging if they require a fixed partial denture in the esthetic zone since the most common material, a ceramometal bridge, requires infragingival margins; if any recession occurs, a catastrophic esthetic failure will result. The case presented here underscores all these special issues. Proper multidisciplinary management, good patient communication, and the use of an all-ceramic fixed partial denture system can provide an excellent final result. CLINICAL SIGNIFICANCE: Replacing teeth in the esthetic zone is complicated, especially when trauma has caused severe damage to the surrounding bone and gingiva. Satisfying a demanding patient requires a multidisciplinary approach and psychological management, as are exemplified in this article.

Adult↗
PubMed1975

The provisional fixed partial denture.

A discussion of the rationale and requirements of the provisional restoration in fixed prosthetic dentistry has been presented. The imporatnce of this phase of restorative densitry and a survey of techniques for making interim restorations were gleaned from a review of the literature. A method for the fabrication of a provisional fixed partial denture using an acrylic resin interocclusal record was described and illustrated.

Dental Restoration, Temporary↗