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Results for “Denture, Complete, Upper”

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At least 19 recordsLinked to original sources
PubMed1979

Structural changes for speech improvement in complete upper denture fabrication.

In the absence of any clearly identifiable pathologic condition, the prosthodontic patient demonstrating speech problems after insertion of complete dentures is having difficulty with loss of turbulence, because of the diminution of tactile location skills in speaking, or both. Potential aids to speech improvement are a nonanatomic papilla placed on the oral surface of the denture just posterior to the location of the incisive papilla, a transversely elongated rugae-like papilla at about the same location, a roughened region at that spot, or an identation sufficient for the patient's tongue to identify. The location and effectiveness of such structural changes can be planned and judged with the cooperation of a qualified speech pathologist.

Alveolar Process↗
PubMed1992

[The causes of longitudinal fracture of the upper complete denture base].

Laying the strain gauge on the design areas of palatal base and frenum labiorum of complete dentures and simulating the different shapes of notch of frenums by the photoelastic mould. The test of the base condition under static and dynamic load by electrical measurement method was carried out. The longitudinal breaking line on the front part of the palatal base was first observed. The causes of breaking may be due to: the weak effect of notch of frenum labiorum; stress concentration on the front part of the base; material fatigue caused by the repeated alternate force and the strength of base material reduced by unsuitable processing.

Dental Stress Analysis↗
PubMed1975

The effects of variations in the opposing dentition on changes in the partially edentulous mandible. Part II. Densitometric measurements.

Distal-extension lower removable partial dentures were used to study the effects of various types of opposing dentitions on the residual mandibular ridge. The opposing-dentition groups included complete upper dentures, removable partial upper dentures, and natural teeth. Changes in the bone of the lower residual ridge were measured by means of densitometry. A significant densitometric difference was found in the bone of the partially edentulous mandible between the group of subjects wearing complete upper dentures and the group with natural upper teeth. The reason for this difference is uncertain; however, several theories can be offered. These are (1) an inherent bone difference between the subjects in the two groups, implying a difference in the bone of the group that retained their natural upper teeth longer than did the complete denture group, (2) an increased frequency and/or duration of muscle pull on the mandible due to clenching of the teeth to stabilize the upper complete denture, and (3) the possibility of coincidence. None of the densitometric changes measured at +18 months was significant.

Absorptiometry, Photon↗
PubMed1979

[Studies on the thinning of the upper acrylic resin complete denture with the reinforced palate. (Part 1). Thinning of the resin denture base with the standard shape (author's transl)].

The acrylic denture bases are most commonly used as compared with metallic denture bases at present. For this reason, it is due to many excellent properties, for example, simple processing, easy repair, cheapness and so on. But an inherent disadvantage is liability of an acrylic denture base to make thick so as to maintain stiffness and strength and it makes patients uncomfortable. Therefore, the purpose of this paper is to make the palatal region of the upper complete denture thin with about 0.7 mm in thickness, and to keep the same mechanical properties as the normal resin dentures using the composites materials with carbon cloth. Tensils test of the plate test-piece and uniform bending test of the upper complete denture with steel wings were respectively performed. The results obtained in this investigation are as follows: 1) The acrylic composites reinforced with carbon cloth have shown the superior mechanical properties to be compared with the acrylic resin to be generally used. 2) The thickness of the reinforced thin denture is decreased to 0.7 mm (its thickness is 60% of the normal thickness of the one), nevertheless, the stiffness and strength are increased with the using of the composite materials. 3) The region of highest surface tensile stress in the denture was on the polished surface of the palatal aspect of the denture in the area immediately behind the anteriors, but at this region, the strain of the reinforced thin denture base decreased its strain 10% in comparison with the non-reinforced normal thick one.

Acrylic Resins↗