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Results for “Denture, Partial”

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At least 703 records · Page 39Linked to original sources

PubMed1993

On functional strain in fixed and removable partial dentures. An experimental in vivo study.

Three rosette strain gauges were attached to a fixed bilateral cantilevered crossarch maxillary bridge and one linear strain gauge to an attachment-retained removable partial denture (RPD), to study the functional deformation pattern in this combined reconstruction. The deformation under clinical conditions at maximum habitual biting and at maximum unilateral loading was very complex, with both elongation and contraction in different parts of the fixed reconstruction. Even though this complexity in the functional deformation was found both with and without the RPD incorporated, the RPD seemed to provide a more even and favorable distribution of the masticatory forces in the fixed reconstruction.

Adult↗

PubMedDate not supplied

Fabricating a gold occlusal platform on a removable partial denture to help prevent extrusion of mandibular incisors.

A clinical procedure is presented in which a maxillary removable partial denture replacing anterior teeth was fabricated with a cast gold anterior occlusal platform. This treatment is indicated to correct abrasion caused by extruded mandibular anterior teeth on the maxillary removable partial denture. The advantages compared to prosthetic teeth supported by an acrylic resin base or metal-backed facings are discussed. This technique allows for development of optimal esthetics, strength, and durability while preventing further extrusion and excessive wear of the teeth occluding against prosthesis.

Denture Design↗

PubMed2003

Improved design of long-span resin-bonded fixed partial dentures: three case reports.

When single-tooth implants are not appropriate, the use of resin-bonded fixed partial dentures is a preferred treatment option when the abutments are relatively sound. However, the use of resin-bonded fixed partial dentures (RBFPDs) for replacing two or more missing teeth is considered to have a guarded prognosis, as long-span RBFPDs have been shown to be less successful than single pontic prostheses. The use of properly modified nonrigid connectors may well improve the success of long-span RBFPDs by reducing harmful interabutment stresses that appear to be responsible for retainer debonding in long-span RBFPDs. For such long-span prostheses, it is advised that the major retainer have wraparound on at least three surfaces of the abutment or have strategically placed opposing axial grooves or slots. It is considered essential that the connector allow interabutment movement in both the horizontal and vertical planes so that the retainer with the greater resistance and retention form does not stress and possibly debond the minor retainer. The upside-down positioning of the nonrigid connector and the matrix incorporated with the major retainer is considered important for successful maintenance, if a debond should occur due to greater loading on the major retainer, because it can be removed and recemented easily. Clinical cases are described that replace two or more missing teeth using fixed-movable RBFPDs with nonrigid connectors.

Dental Stress Analysis↗

PubMed2001

[A clinical and physiological evaluation of prosthodontic treatment by removable partial dentures with free-end saddles--a 3.5-year follow-up study].

The aim of this study was to evaluate the longitudinal clinical and physiological changes in jaw elevator muscle activity of partially edentulous patients, for approximately 3.5 years after treatment by removable partial dentures with free-end saddles. Seven patients (4 males and 3 females, aged 38-68 years) who visited a university dental hospital, and were found to have no signs and symptoms of TMJ disorders, participated in the follow-up study. The functional impression method with wax was used in the treatment process of these patients. At the follow-up times of 0.5, 1, 2, 3, and 3.5 years after denture deriverly, EMG activities using bipolar surface electrodes were recorded from masseter and anterior temporal muscle on both sides during maximal voluntary clenching and tapping, and at the same time the maximal bite force was also recorded using the Dental Prescale System. The integrated EMG, the correlation coefficient between muscle activities of both sides, bite force, and the location of the occlusal load center, were analyzed using repeated measured ANOVA. A comparison between each measuring session was carried out using Bonferroni's method. Results were as follows: i) The muscle function of partially edentulous patients was clearly activated by wearing a removable partial denture, and the activation was kept at the same level until 3.5 years after denture deriverly. ii) The activation of jaw elevator muscles by wearing a denture was greater in masseter muscle than in anterior temporal muscle. This finding reflected the effect of the recovered occlusal contact. iii) The occlusal load center of the recovered dentition by a removable partial denture shifted antero-posteriorly close to the end abutment teeth.

Adult↗

PubMedDate not supplied

Fixed partial dentures supported by natural teeth and Brånemark system implants: a 3-year report.

PURPOSE: To evaluate fixed partial dentures (FPDs) supported by a combination of natural teeth and implants in a variety of clinical situations. MATERIALS AND METHODS: In 30 patients, 86 teeth and 85 implants were used as supports for 30 FPDs of varying extension (mean = 8.6 units); 23 in the maxilla and 7 in the mandible. The prostheses had a removable section fastened with screws to both the implants and to a section cemented on the supporting teeth, and were thus functioning as rigid, fixed partial dentures. RESULTS: Five implants were lost prior to the placement of prostheses, 2 were lost after loading, giving survival rates of 91.0% in the maxilla and 95.5% in the mandible. Complications were predominantly soft tissue-related and were all amenable to treatments. One patient was lost to follow-up. The remaining 29 FPDs remained stable throughout the 3-year observation period. DISCUSSION: Changes in plaque accumulated, bleeding on probing, pocket depths, and marginal bone level were acceptable. The survival rate of implants was comparable to that of similar studies. Further investigations are needed with regard to design for such FPDs. CONCLUSION: These findings, together with the patient satisfaction experienced, indicated that the combined support of implants and teeth for fixed prostheses may be appropriate treatment for patients.

Adult↗

PubMed2004

Fixed partial denture supported by all-ceramic copings: a clinical report.

This clinical report describes the prosthodontic treatment of a partially edentulous patient who had a surgical closure of bilateral cleft of the lips, alveolar processes, and palate. The prosthodontic treatment included the fabrication of a "telescopic" fixed partial denture supported by reinforced all-ceramic primary copings. The use of all-ceramic primary copings, rather than gold copings, offers an alternative fixed partial denture and improves the esthetic result in certain clinical situations.

Adult↗

PubMed1994

Removable partial denture design: importance of clinical variables.

A study was conducted to ascertain the influence of clinical variables on removable partial denture design. Dentures were first designed using only the information usually available to technicians, namely, surveyed, articulated study casts. These designs were then modified using information available to the dentist, that is, clinical variables. Of the 208 dentures analysed, 80 (39%) needed modification to 171 components because of patient-related variables. This high number of modifications reinforces the position that removable partial denture design should be instigated and guided by the dentist.

Dental Occlusion, Traumatic↗

PubMed1991

Use of an implant in repair of a fixed partial denture. A clinical report.

A repair technique for a fractured solder joint in a multiple-unit fixed partial denture has been presented. The advantages of this technique include (1) retention of part of an existing restoration; (2) provision of additional support to minimize future fracture; (3) removal of the implant crown for periodic evaluation and/or treatment; and (4) retention of a fixed partial denture where a removable prosthesis might otherwise be needed. The primary disadvantage of this technique is the time and expense associated with implant placement.

Adult↗

PubMed1996

Comparison of the in vitro fatigue resistance of an acrylic resin removable partial denture reinforced with continuous glass fibers or metal wires.

PURPOSE: The fatigue resistance of heat-polymerized acrylic resin test specimens reinforced with continuous glass fibers or metal wire was investigated. MATERIALS AND METHODS: Test specimens in the shape of maxillary removable partial dentures were reinforced with one of the following: (1) circular steel wire (cross-sectional diameter, 1.0 mm); (2) semicircular steel wire (cross-sectional diameter, 1.0 x 2.0 mm); or (3) continuous unidirectional E-glass fibers. Ten specimens were fabricated for each test group. The specimens were tested by a constant force flexural fatigue test at a force of 180 N while immersed in 37 degrees C water. The number of loading cycles required to generate a fatigue fracture and the position of the fracture were measured. RESULTS: Results showed that the test specimens, which were either unreinforced or reinforced with metal wires, fractured after 13,197 to 39,237 loading cycles. For the glass fiber-reinforced test specimens, the fracture did not coincide with the region of the strengthener but with the opposite side of the test specimen after 1,239,298 loading cycles. The position of the fracture showed a statistically significant variation between the test groups (P < .001). CONCLUSIONS: This study suggests that the fatigue resistance of acrylic resin removable partial dentures reinforced with glass fibers are superior to those removable partial dentures reinforced with conventional metal wire.

Analysis of Variance↗

PubMed2002

Onlay partial denture technique for assessment of adequate occlusal vertical dimension: a clinical report.

Clinical treatments that require restoration of occlusal vertical dimension pose a challenge to prosthodontists. This article describes the modification of existing removable partial dentures into onlay interim prostheses. This process allowed the patient's tolerance to the restored occlusal vertical dimension, esthetics, and phonetics to be evaluated before irreversible changes were made to the dentition.

Acrylic Resins↗

PubMed1967