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At least 685 records · Page 38Linked to original sources
PubMed1990

Periodontal conditions following treatment with distally extending cantilever bridges or removable partial dentures in elderly patients. A 5-year study.

The aim of the present study was to evaluate the periodontal conditions following treatment with distally extending cantilever bridges or removable partial dentures (RPDs) in elderly patients. All participants had a complete denture in the maxilla and moderate-to-advanced bone loss around the teeth present in the mandible. After undergoing periodontal treatment, 27 patients were treated with distally extending cantilever bridges and 25 patients with a RPD. During the first 2 years following prosthetic treatment, the patients were recalled twice a year and during the last 3 years once a year for oral prophylaxis and assessment of the periodontal status. The patients treated with a RPD showed higher mean Plaque and Gingival Indexes than the patients treated with cantilever bridges. No change in probing pocket depths was observed in either group, and only a small decrease in radiographic alveolar bone height was revealed. In conclusion, only minor changes in the periodontal conditions were recorded during the 5 years of observation after treatment with cantilever bridges or RPDs.

Aged↗
PubMed1990

Cross-sectional study of patients fitted with fixed partial dentures with special reference to the caries situation.

The caries situation among 30 patients with fixed partial dentures was examined 3 yr after cementation of the constructions. The fit of the crowns on the abutment teeth, the size of the interproximal areas and the relation between the crown margin and the gingival margin were registered. Risk factors for caries development, such as salivary factors, microbiologic factors, oral hygiene and diet were evaluated for each patient. During the 3-yr period 54 caries lesions occurred in 25 patients. Eleven lesions were found on abutment teeth. Two were located on the root surfaces unconnected with the crown margin (greater than 2mm from the gingival margin), three were recurrent lesions, where the crown margin was located above the gingival margin but closer than 2 mm and six were recurrent lesions where the crown margin was located under the gingival margin. No single caries risk factor seemed to be so closely correlated to the number of caries lesions developed that it could be used alone to select of patients at risk. When the sum of the assumed negative factors was used, more caries was found among the patients with three or more factors with negative values in the group as a whole. However, predicting the development of caries in an individual case with a high degree of probability seems to be complicated. Generally speaking there was no indication that caries disease development was caused by the presence of the fixed partial denture per se.

Adult↗
PubMed1992

The effect of removable partial denture framework design on gingival inflammation: a clinical model.

A clinical trial using the experimental gingivitis model developed for periodontal clinical research was performed to evaluate the effect of a removable partial denture mandibular major connector design on the surrounding gingival tissues. A comparison of the state of health of adjacent gingival tissues was made between the linguoplate (control) and cingulum bar (test) major connectors. Clinical parameters were recorded in a single-blind crossover experimental gingivitis trial. Subjects were brought to a level of optimal gingival health and then randomly assigned to use one framework design while refraining from any oral hygiene. Measurements were made at 7-day intervals for 21 days. The subjects were returned to optimal oral health and repeated the experimental period with the alternate design. Results showed a greater increase in mean gingival inflammation with the control than with the test removable partial denture, suggesting that the cingulum bar has fewer detrimental effects on gingival tissues than the linguoplate major connector. Results of this study suggest that the experimental gingivitis model can be a useful and valid system for studying the potential effects of a removable partial denture design on surrounding oral tissues.

Adult↗
PubMed1994

Influence of water storage and thermal cycling on the fracture strength of all-porcelain, resin-bonded fixed partial dentures.

The purpose of this in vitro study was to evaluate the influence of water storage and thermal cycling on the fracture strength of two designs of all-porcelain, resin-bonded fixed partial dentures made with the glass-infiltrated alumina ceramic In-Ceram. Forty frameworks of In-Ceram ceramic veneered with Vitadur-N porcelain were made to replace an upper central incisor bonded to extracted natural teeth. In 20 of the restorations the pontic was veneered only labially with Vitadur-N porcelain and no proximal box preparations were made (design A). The other 20 restorations had additional box preparations proximal to the pontic and the In-Ceram ceramic pontic framework was shifted to the labial aspect and veneered circumferentially with Vitadur-N porcelain (design B). Subgroups of 10 restorations were stored for 7 days in thymol solution or alternatively for 150 days in artificial saliva with thermal cycling for 18,750 cycles between 5 degrees and 55 degrees C. Restorations with design B had a statistically significantly higher fracture strength than restorations with design A. Storage in artificial saliva with thermal cycling significantly reduced the fracture strength of the resin-bonded In-Ceram fixed partial dentures. Therefore, the long-term clinical behavior of resin-bonded In-Ceram fixed partial dentures must be evaluated before general clinical use can be recommended.

Aluminum Oxide↗
PubMed1990

[Partial denture components and principles of their design].

In comparison between acrylic and metal framework partial denture minor and reduced major connectors represent the main structural difference. Basic principles of design consider: an examination of the partially edentolous mouth, surveying of abutment teeth and analysing of forces, which act on the denture during its function. In the literature above all chewing (positive) forces and their leverage action upon partial denture are described. Beside positive, the article analyses also the problem of dislodging (negative) forces upon partial denture and design of stabilizing elements.

Dental Stress Analysis↗
PubMed1975

An adhesive technique for small anterior fixed partial dentures.

A technique for the fabrication of a resin anterior fixed partial denture of intermediate length has been described. This type of device offers an inexpensive, quick treatment for selected patients with two adjacent missing anterior teeth. The technique allows the postponement of a definitive treatment to a more favorable time. The total treatment can be completed in two relatively short appointments.

Acrylic Resins↗
PubMed1978

Laboratory procedures for fitting removable partial denture frameworks.

A technique has been described for fitting a removable partial denture framework to the master cast prior to adapting it in the mouth. Emphasis should be placed on maintaining the original contour of the framework throughout the procedure. The amount of metal removed should be only that necessary to seat the casting on the master cast without abrading the stone. When finishing the tooth-contacting surfaces on the casting, very light pressure should be used to burnish the rough surfaces, not reduce them. If these steps are accomplished carefully in the laboratory, the dentist should be able to fit the framework in the mouth in a minimum of time (Fig. 7).

Dental Alloys↗
PubMed1989

Remount casts for removable partial dentures made in a laboratory.

A remount cast for a removable partial denture can be made in the laboratory by making an elastomeric impression of the prosthesis on the cast after processing but before removing it from the cast. After the prosthesis is finished and polished it is placed in the impression, undercuts are blocked out, and a mounting cast is made.

Dental Occlusion↗
PubMed1991

Ulcerative lesions of the palate associated with removable partial denture castings.

Regions of inflammation with or without ulceration beneath removable partial dentures have been of concern to prosthodontists for many years. The etiology of these lesions has not been established, but potential factors are microbial infection, obstructive sialadenitis, and allergic-type reactions to the metal framework. A new etiological factor that may be involved is described. Focal pitting corrosion and by-products of corrosion in nickel-chromium alloys are discussed as toxic agents responsible for palatal lesions. Six patient reports that include results of tissue biopsy and EDAX analysis of casting are presented.

Adult↗
PubMed2007

Effect of implant support on distal extension removable partial dentures: in vitro assessment.

The implants in implant-supported removable partial dentures (RPDs) are placed in the edentulous ridge to stabilize the RPD and minimize the resultant rotational movement. This study investigated the effect of implant placement on RPD stability. A model simulating a mandibular bilateral distal extension missing was fabricated using epoxy resin and silicone impression material as thin (1 mm) and thick (2 mm) soft tissues. Five pressure sensors (PS-10K, Kyowa, Tokyo, Japan) were attached near the left and right first molars (#36 and #46), first premolars (#34 and #44) and medio-lingual alveolar crest. Five bilateral distal extension RPDs with Co-Cr frameworks were conventionally fabricated. After the implants were placed at the bilateral second molar areas, healing caps (4.5 mm high) were connected to the denture base with autopolymerized resin to support the RPD. As in a conventional RPD, sealing screws were placed without connecting them. Loads up to 5 kg were applied, and the pressure and displacement of the RPDs (n = 5) were simultaneously measured and analysed using the Wilcoxen test (alpha = 0.05). There was less pressure on both thin and thick soft tissues, the #36, #46 and the medio-lingual alveolar crest from the implant-supported RPD than from the conventional RPD (P < 0.05). There were no significant differences in pressure on #34 and #44 between the two RPDs (P > 0.05). There was significantly less denture displacement of the implant-supported RPD than of the conventional denture (P < 0.05). Implant support helped prevent the displacement of distal extension RPDs and decreased the pressure on soft tissues.

Denture Bases↗
PubMedDate not supplied

Esthetic removable partial dentures.

This article provides information regarding the many ways that removable partial dentures (RPDs) may be used to solve restorative problems in the esthetic zone without displaying metal components or conspicuous acrylic resin flanges. The esthetic zone is defined and described, as are methods for recording it. Six dental categories are presented that assist the dentist in choosing a variety of RPD design concepts that may be used to avoid metal display while still satisfying basic principles of RPDs. New materials that may be utilized for optimal esthetics are presented and techniques for contouring acrylic resin bases and tinting denture bases are described.

Cuspid↗
PubMed1991

Custom-made resin-bonded attachments supporting a removable partial denture using the spark erosion technique: a case report.

A removable partial denture supported by resin-bonded precision attachments was constructed for a patient with intraoral symptoms of a cleidocranial dysostosis. Because of the anatomic situation, the youth, and the preprosthetic orthodontic treatment of the patient, a conventional prosthetic solution seemed inappropriate. Custom-made attachments were constructed with the spark erosion technique. They were fixed to the abutment teeth with resin-bonded retainers. The combination of the resin-bonding technique with the modern technology of spark erosion thus allowed a conservative approach to the oral rehabilitation of a young patient.

Adolescent↗
PubMed2006

[Case report of enterobrosis and diffuse peritonitis caused by a swallowed removable partial denture].

A female patient, aged 62 years, unexpectedly swallowed a removable partial denture (RPD) during the supper. The doctor failed to take out the RPD from her stomach under the gastroscope during the emergency treatment at the first day. 2 days later, the PRD blocked the intestinal tract and its metal clasps penetrated the wall of the intestine near the ileocecal junction, it soon leaded to enterobrosis and diffuse peritonitis. At last, abdominal operation was conducted to take the RPD out from the intestine and enterobrosis was patched up successfully. Diffuse peritonitis was also cured by intravenous infusion of antibiotics for about 1 week.

Dental Clasps↗
PubMed1995

Advances in partial denture ceramics.

Two techniques for incorporating bonded porcelain facings within metal partial dentures are described. In the first technique, porcelain is bonded to a metal framework constructed of bonding alloy. In the second technique, separate components are combined in a cast-on procedure to incorporate the mechanical properties of both bonding and framework alloys in one prosthesis. These techniques have enabled the successful treatment of patients in whom limited interocclusal space or parafunctional activity had led to failure of previous prostheses.

Acrylic Resins↗
PubMed1997

Design sequence and mouth preparation for the removable partial denture.

This article discusses the procedure for designing the "best" removable partial denture. The best design will preserve the abutment teeth and the edentulous ridge. The restorative dentist's task in making an RPD is not to try to maintain function as it had been prior to tooth loss but rather to preserve what remains of the oral mechanism.

Denture Bases↗
PubMed1976

Frequency and location of artificial crowns and fixed partial dentures constructed at a dental school.

The material consists of patients who received single crowns and fixed partial dentures at the Department of Prosthetics, Dental Faculty, University of Oslo in the period 1967-73. Two-thirds of the patients were women, and about two-thirds of the restorations were made in the maxilla. A total of 3275 crowns were received by 2145 patients. On average, maxillary teeth were crowned 7 years earlier than mandibular teeth. A total of 1393 fixed partial dentures, consisting of 6835 units, were made for 1368 patients.

Adolescent↗