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At least 541 records · Page 30Linked to original sources
PubMed2006

Acceptability of maxillary major connectors in removable partial dentures.

BACKGROUND: The choice of connector lies between plate, a bar or a combination of bars, which may cross the palate in various positions. Many opinions have been expressed concerning the acceptability to the patients of the various forms of palatal connectors but there have been few investigations. OBJECTIVES: The aim of this study is to compare subjective patients' reactions to three maxillary major connectors: metal bar, metal plate, and acrylic connectors and to establish the most acceptable and the least acceptable maxillary major connectors. METHODS: Fifteen consecutive patients attending the prosthetic out-patient clinic of Dental Center, University College Hospital, Ibadan who had never worn dentures were recruited into the study. Three dentures each with a different maxillary major connector design were fabricated for each patient. A questionnaire was administered to ascertain their reactions to each of the three denture designs. RESULTS: Fourteen patients (93.3%) preferred the denture with metal palatal bar major connector whereas only one patient preferred the denture with acrylic plate major connector design. No patient preferred the palatal metal plate connector design. CONCLUSIONS: The metal bar major connector was the most acceptable maxillary major connector while acrylic resin plate was more acceptable than metal plate maxillary major connector. It also confirmed the influence of connector design on patient acceptance of removable partial denture.

Acrylic Resins↗
PubMed2006

[Case report of a patient with bounded missing, treated with removable partial denture].

PATIENT: The patient was a 60-year-old male with the chief complaint of loosening of the bridge on the upper right side. The diagnoses of the patient were detachment of the bridge (7 6 5 4 3 2 1 | 1) and root fracture (5|). A cobalt chromium plate with Mini-SG attachment was used at 4 3 2| to fix the bridge. The course of the patient was uneventful five years after the treatment. DISCUSSION: Judging from the condition of the detached bridge, the same type of fixed bridge was considered too weak to withstand the lateral force. Stabilization of the functional occlusion was achieved by using the attachment, followed by good clinical results. CONCLUSION: The patient was satisfied with the comfort of the removable partial denture with attachment, and good functional results were obtained.

Denture Design↗
PubMed1996

The acquisition and validation of removable partial denture design knowledge. I. Methodology and overview.

The authors report on the eliciting of the partial denture design expertise of teachers of prosthetic dentistry. Their approach was to identify 125 design rules and then to sample expert reaction by surveying 10 experts individually and by surveying the prosthetic departments in all 17 dental schools in the British Isles. The surveys achieved a return of 100% and revealed an unsuspected consensus concerning the rules. A majority of schools were in agreement on whether or not 111 (89%) of the rules could be supported. This design expertise will be disseminated through RaPiD, a knowledge-based assistant for the design of removable partial dentures. It is expected that by incorporating into this design assistant rules which have been shown to be widely supported, the acceptability and usefulness of RaPiD for clinical education and practice will be increased.

Artificial Intelligence↗
PubMed1992

Keratinization of palatal mucosa beneath metal-based removable partial dentures.

Exfoliative cytology provides a non-invasive method of examining changes in epithelial differentiation beneath dentures. Cell sampling by mechanical scraping may introduce errors due to collection of deeper epithelial cells, therefore an alternative sampling method was evaluated. Cells collected from the hard palates of 24 dentate subjects using either a wooden tongue depressor or transparent, adhesive-coated tape were fixed and stained by Papanicolaou's technique. The percentage of the total epithelial cells counted that were anucleate (the orthokeratinization index) was 99.95 per cent using the tape technique but 15 per cent lower using the smear technique. It appears that the tape technique gives a more accurate representation of the orthokeratinization of superficial cell layers. The tape technique was used to examine epithelial changes beneath tooth-supported removable partial dentures (RPDs). In 26 subjects, who had worn cobalt chromium based RPDs for at least 6 months, samples taken from beneath the metal denture base had a 50 per cent lower orthokeratinization index than those from uncovered areas of the palate.

Adolescent↗
PubMed1987

[Relation of the major connector of a removable partial denture (RPD) with mandibular mucosal tissue; clinical case].

When the performance of removable partial prosthesis is analyzed, it can be seen that failures outnumber the successes. These failures, however, should not be imputed to the prostheses themselves, but rather to the fact that proper biomechanical principles were not observed in the planning of these devices. Each component of a prosthesis should be carefully planned in order to obtain maximum stability with respect to the supporting tissues. One of these principles is concevued to the relieve that must be established between major connectors and mandibular mucosae. It is important to remember that mandibular mucosae is fine, moveable, very sensitive and weak, so that this mucosae be considered very susceptible to mechanical aggression. In this work the authors emphasize the necessity of relieve in the mandibular major connector in order not to pressure the investing tissues. Otherwise serious periodontal damage can occur.

Denture Design↗
PubMed2002

Removable partial denture design: a study of a selected population in Saudi Arabia.

Determination of the incidence of various classes of removable partial dentures (RPDs) including their designs and their comparison with previous studies provide clinically useful information for dental training and continuing education. The purpose of this study is to determine the pattern of partial edentulism, the major connector, clasping, and design of 740 cobalt chromium RPD frameworks constructed for a selected population in Saudi Arabia. RPD framework design information and patient personal data were obtained from the work authorization form and the dental records respectively. The relationship among age, sex, nationality, and various Kennedy classes of the RPDs was determined by chi-square statistical analysis. Results indicate that Kennedy Class III removable partial dentures were the most frequently constructed. Although gender had no significant relationship, age and nationality had statistically significant relationship with the distribution of various Kennedy classes of removable partial dentures. Lingual bars and anterior posterior palatal straps were the most commonly used mandibular and maxillary major connectors. Lingual and palatal plates, however, were more frequently used than any major connectors for distal extension RPDs. Comparison with previous findings confirms the established variation in designing RPDs. The distribution of partially edentulousness revealed the influence of the general pattern of tooth loss, which could be modified by patient's demands and socio-economic status. Practitioners need to avail themselves fully of basic RPD design principles concerning the most commonly encountered classes of RPDs.

Adolescent↗
PubMed2002

Internal porosity of cast titanium removable partial dentures: Influence of sprue direction on porosity in circumferential clasps of a clinical framework design.

STATEMENT OF PROBLEM: Although internal porosity is a potential risk factor for clasp fracture, little is known about its frequency in the clasps of titanium removable partial dentures. PURPOSE: This study investigated the influence of the direction of auxiliary sprues on porosity in the circumferential clasps of a pressure-cast titanium removable partial denture. MATERIAL AND METHODS: Wax patterns of a removable partial denture framework were made on 10 identical refractory casts of a Kennedy class II, modification 1, mandibular partially edentulous arch. For the auxiliary sprues directed to the circumferential clasps, 2 designs were used: straight and curved. Casting was performed in a 1-chamber pressure casting machine. Pore number and size were assessed on radiographs of the castings. The data were analyzed with the 2-tailed Student t test (P <.05). Randomly selected specimens were sectioned for morphologic observation of the internal surface of the pores. RESULTS: The number of pores >or=0.5 mm diameter and the total number of pores were significantly lower in the molar lingual arms of the curved sprue group than in the corresponding clasp arms of the straight sprue group (P =.03 and P =.009, respectively). No significant differences between the 2 groups were found for pores of any size in other locations. The pores had smooth internal surfaces. CONCLUSION: Within the limitations of this study, the curved sprue design produced significantly less porosity in the circumferential clasp arms of a cast titanium removable partial denture than the conventional straight design. The results suggest that internal porosity in titanium castings can be controlled through sprue design.

Dental Casting Technique↗
PubMedDate not supplied

[State of periodontium in patients using partial removable dentures].

The authors have examined 63 patients whom 86 partial removable dentures: functionally unstable dentures and supported ones in all have been made. The state of paradontium basing on G-I gingival index and Pl-I plaque index has been estimated. It has been found that the state of paradontium in the group of supported dentures irrespective of the utilization life was better than in the group of functionally unstable dentures.

Denture, Partial, Removable↗
PubMed2003

Esthetic considerations with removable partial dentures.

The reduction in partial edentulism that has occurred due to successful preventive procedures and the predictable use of osseointegrated implants has reduced the need for removable partial dentures. However, for a variety of reasons, many patients can continue to benefit from partial denture therapy; and these patients deserve the best esthetic result possible. The primary esthetic objection to removable partial denture therapy is the unsightly display of the clasp assemblies. This article describes three strategies that can be used by the discriminating clinician to eliminate the display of the clasp assembly and provide an esthetic and functional removable prosthesis.

Dental Clasps↗
PubMed1989

[Photoelastic stress analysis of fixed-removable partial denture which had bar and Ceka-Anchor attachment].

In our study, we constructed fixed-removable partial prosthesis, which are supported by teeth and tissue for patients who exhibited extensive tissue loss. In these prosthesis the localization of the precision attachments on the bar and the stress conducted to the abutment teeth by changing the number of splinted teeth and inclination of the bar were compared with photoelastic analyses and the results were evaluated. The photoelastic material used was Araldite/B and its catalyst was HT 901 fitalic anhydrate. The models constructed with these materials were examined in photoelastic polariscope and fringes occurred due to the force applied were photographed and analyzed.

Dental Stress Analysis↗