PubMed Health⌕ Search

SEARCH · PubMed Health

Results for “Denture, Overlay”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 73 records · Page 4Linked to original sources
PubMed1999

Flexural and thermal cycling of resins for veneering removable overlay dentures.

OBJECTIVES: This investigation compared the effect of flexural and thermal cycling upon resins, bonded via adhesive primers to cobalt-chromium alloy to identify appropriate materials for veneering overlay dentures which may flex in function. METHODS: The resins investigated were an acrylic resin, a crown and bridge resin, a urethane dimethacrylate and a hybrid composite resin systems. The first three were bonded via an adhesive primer/opaque system based upon 4-methacryloxyethyl trimellitate anhydride (4-META) and the last via one based on 10-methacryloxyldecyl dihydrogen phosphate (MDP). Cast alloy beams 30 x 4 x 0.8 mm with 2 mm resin veneers were stored in H2O for three days or three months, and subjected to 1000 thermo-cycles between 4 and 60 degrees C, and/or 5000 flexural cycles to a displacement of 0.1 mm. Three-point bend testing was carried out in an Instron 4505 UTM. The increase in the flexural moduli of the cast beams, due to the addition of the resin spines, together with the displacements and loads at yield were recorded. RESULTS: The adhesive resin systems varied in their abilities to withstand conditioning stresses, this appeared to reflect the rigidity of the resin component as well as the performance of the adhesive bond. CONCLUSIONS: While the composite/MDP system maintained the highest bond strength throughout the conditioning, its low displacement at yield indicates that it may be more suitable for rigid areas of a removable partial denture. Acrylic resin, with its high load and displacement at yield, make it the material of choice for veneering the more flexible saddle areas of partial dentures.

Acrylic Resins↗
PubMed2005

Cast titanium overlay denture for a geriatric patient with a reduced vertical dimension.

An older patient reporting to the dental surgery for his/her dental treatment is becoming a common occurrence. Improved oral hygiene has meant that teeth are retained for a longer time, along with the potential problems of attrition, decreased vertical dimension, temporomandibular joint discomfort/strain, and poor aesthetics. The case in question is that of a 65-year-old male patient who had severe attrition in the lower arch, temporomandibular joint pain and reduced vertical dimension. The maxillary arch had previously been restored with a fixed partial prosthesis. For restoration of the lower teeth, a removable cast titanium overlay denture was fabricated incorporating an increased vertical dimension. Porcelain facings were placed to restore the aesthetics of the anterior teeth. The titanium was cast in a semi-automatic electric arc, pressure type casting machine. A titanium overlay denture with porcelain facing on the anterior teeth may provide a means of restoring a patient's concerns regarding aesthetics and function.

Aged↗
PubMed1996

Treatment of temporomandibular joint dysfunction with a visible light-cured resin overlay denture: a case report.

A woman presented with temporomandibular dysfunction caused by a marked overclosure of her mandible. She complained of pain and clicking noises in her temporomandibular joint. After initial assessment and treatment with a provisional occlusal acrylic resin splint, the patient was provided with a definitive overlay denture with visible light-cured resin as occlusal overlays. The denture was stable in the mouth and the occlusal resin material showed some occlusal wear at the 2-year examination.

Acrylic Resins↗
PubMed1975

Selection of retainers in lower overlay denture-in relation to the abutment tooth mobility--(a laboratory study).

This study was done to evaluate the art of retaining the lower sub/complete, overlay denture, in relation to the abutment tooth mobility while the force was applied to the denture. The lower overlay denture was placed on a simulated model which was constructed of methylmethacrylate and silicone rubber. The author developed and used the special devices for measuring the tooth mobility. Results obtained were as follows: 1. When a force is applied directly to the abutment, the tooth mobility, i.e. the lateral excursion of the tooth, is markedly reduced according to the favorable ratio of the clinical crown to the root length. Splinting by the bar is effective to reduce the lateral excursion. 2. When a force is applied to the denture indirectly to the abutment tooth, the lateral excursion changes greatly according to the retainer selected. 3. The clasp retainer shows the greatest change in the lateral excursion against every loading on the denture. 4. All three types of bar attachment show the least value of lateral excursion.

Dental Abutments↗
PubMed1975

Occlusal force discrimination by denture patients.

A study was conducted on subjects with conventional dentures and with overlay dentures to compare their abilities to discriminate between occlusal forces. Perpendicular forces were applied to the dynamic center of the occlusal table of the mandibular denture. Each subject's ability to distinguish differences in values of force was observed and recorded. All subjects with dentures showed sensory threshold values close to those reported for natural teeth. A graphic plotting showed that the responses of subjects with overlay-type dentures were more closely correlated with the psychophysical law as expressed by Stevens as a power function. Since this phenomenon holds true for natural teeth, the overlay denture more closely resembles natural teeth in this type of sensory function than does the conventional denture. In addition to recognized advantages, such as preservation of the ridge and improved retention and stability, the overlay denture provides more typical sensory function than is provided by the conventional denture. This advantage should further motivate dentists and patients to consider the retention and utilization of at least two suitable teeth in an overlay-type denture service.

Adult↗
PubMed1976

Considerations in dental treatment of children with ectodermal dysplasia.

Characteristics of ectodermal dysplasia and agammaglobulinemia have been presented and a case in a 6 1/2-year-old boy having both genetic diseases is reported. The child had been mocked by his peers at school. A maxillary overlay denture and mandibular cast denture were constructed using a Baker bar and cast gold thimble crowns. The parents reported that the patients personality changed favorably after dental treatment was completed. He is now 13 years of age, has had his dentures replaced once, and enjous a rather active life with the aid of antibiotics and supplemental globulins.

Agammaglobulinemia↗
PubMed1989

Partial anodontia: a case report.

This article describes the multidisciplinary rehabilitation of a 20-year-old white man with partial anodontia. The patient presented with only three adult teeth; the remaining dentition was deciduous. The mandibular arch was restored with a tooth-supported overlay denture, while the maxillary arch received a fixed prosthesis.

Adult↗
PubMed1991

A composite resin veneer occlusal surface on an overlay partial denture.

The purpose of this article is to illustrate a technique adapting a light-curing composite resin veneer and an opaquing medium with chemical adhesion properties to a partial denture framework in a patient with severely worn dentition. Composite resin veneers with favorable wear properties and esthetics are useful materials for restoring occlusions for overlay removable partial dentures.

Aged↗
PubMed1994

Properties of acrylic resins incorporating 4META for bonding to cobalt-chromium alloys.

Polymer substitution into proprietary 4-methacryloxyethyltrimellitate anhydride (4META) resins creates tooth coloured veneers for cobalt-chromium overlay dentures. The elastic moduli and shear-bond strengths of proprietary resins (matched) and resins polymerised from 4META monomers and substituted polymers (unmatched) were determined. Bond strengths were similar for matched and unmatched heat curing resins (mean 14.1 (SD 1.6 MPa)) but differed for matched (6.9 (SD 1.3) MPa) and unmatched self-curing resins (5.7 (SD 0.9) MPa). Preparation of the alloy surface immediately before packing with resin dough provided significantly higher bond strengths. Structural examination in a scanning electron microscope suggested that bonds developed by unmatched resins may provide less satisfactory clinical performance.

Acrylic Resins↗