PubMed Health⌕ Search

Biomedical subjects

P V Reitz

Publications and source records attributed to P V Reitz.

16 recordsLinked to original sources
PubMed1991

Comparison of the adaptation of acrylic resin cured by microwave energy and conventional water bath.

Acrylic resin record bases made from three commercial resins were processed by water bath curing and by microwave energy. The adaptation of the record bases to a standard cast was measured to determine if there were any statistically significant differences in the fit that could be attributed to the differences in curing methods and the brands of resin. The results indicated a small statistically significant difference in favor of the water bath cure overall, but clinically there were no appreciable differences in the adaptation of the record bases with either curing method or the resins used. The adaptation of artificial dentures made from acrylic resin is clinically acceptable with either microwave curing or the water bath method.

Acrylic Resins↗
PubMed1989

The use of microwave energy for processing acrylic resins.

Test strips of five different resins were processed with (1) microwaves by using a kitchen-type microwave oven, and (2) a conventional water bath. The strips were tested for hardness, porosity, and transverse strength. The results showed no significant difference between resin strips cured by either method. Maxillary dentures were waxed on stone casts of an aluminum model in another study. The dentures were processed with the same five resins, half by using microwave energy and the remainder with the water bath. The adaptation of the processed dentures to the aluminum cast was measured with feeler gauges. The results showed no statistically significant differences between dentures cured by either method. These studies demonstrated that the important physical characteristics of microwave-cured resin are approximately the same as resin cured in a conventional water bath. Curing dentures by microwave energy has the advantages of reduced curing time, ease, and cleanliness.

Acrylic Resins↗
PubMed1985

A photoelastic study of stress distribution by a mandibular split major connector.

This investigation evaluated the stress patterns in a photoelastic model produced by three different mandibular major connectors. The results were as follows. There were minimal differences in stress generated by the rigid and the short split frameworks. When the split extended to the midline, the stress on the distal-extension abutment was in a more vertical direction and decreased in magnitude. The stress in the edentulous portion of the distal-extension side was increased with the long split when force was applied. When force was applied to the tooth-supported side of the removable partial denture, the difference in stress among the three frameworks was insignificant. The long split major connector is a viable, inexpensive alternative to manufactured stress breakers for distal-extension removable partial dentures.

Dental Abutments↗
PubMed1984

A photoelastic study of a split palatal major connector.

A study was made to determine if the split palatal design of maxillary major connectors used on distal-extension removable partial dentures would result in a reduction of torquing stresses on the abutment teeth when the bases were loaded. A photoelastic model to simulate the maxillary arch, abutment teeth with their periodontal ligaments, edentulous ridges, and mucoperiosteum of the palate and ridges was constructed. Two Kennedy Class II removable partial denture frameworks of chrome-nickel alloy were constructed to fit the photoelastic model. One framework had an intact palatal major connector, and the other had a split in the major connector to separate the base from the abutment tooth as a stress-breaker. The frameworks were placed on the model, loaded, and photographed with polarized light to record the stress pattern in the model. The results of this study showed that the split palatal major connector did reduce the stress delivered to the distal-extension abutment when the base was loaded on the experimental model. A significant amount of stress from loading of the framework was removed from the abutment tooth and transferred to the regions of the model underlying the base.

Acrylic Resins↗
PubMed1981

Hinge for a unilateral maxillary arch prosthesis.

This article describes a technique for the fabrication of a hinge that may be incorporated into a maxillary removable partial denture with a unilateral distal-extension denture base. The hinge breaks the stress that would be transmitted to the dentulous arch segment through the retentive portion. Figs. 7 and 8 show a typical arch situation where the Palatar hinge may be incorporated.

Dental Stress Analysis↗
PubMed1978

Fabrication of interim acrylic resin removable partial dentures with clasps.

An orderly sequence of steps for construction of an interim acrylic resin partial denture has been presented. The technique allows the dentist to fabricate an effective restoration that has a definite path of insertion and removal that can be placed in the patient's mouth with little time spent on adjustment and correction. This technique may be used with heat- or cold-curing acrylic resin.

Acrylic Resins↗
PubMed1977

An overdenture survey: preliminary report.

The preliminary conclusions from this survey are listed: 1. The exceedingly high incidence of periodontal pathology seems to be the major problem in the long-term use of overdentures. 2. The incidence of caries is fairly low, but it remains a potential problem. 3. Subjective evaluations by the patients are favorable. 4. The overdenture technique as described by Lord and Teel seems to be practical and advantageous. 5. Additional research to find the most effective agent for inhibiting caries in overdenture support roots should be initiated. 6. Need exists for more surveys by other schools, institutions, or prosthodontists. 7. The overdenture is a valid alternative to complete denture therapy.

Adult↗