Cephalometric evaluation of artificial occlusal plane of complete dentures

An investigation was conducted to study the relationship and the angulation of the artificial occlusal plane as related to the maxillary plane, Cook's plane, Frankfort horizontal plane and the cephalometric occlusal plane. Twenty completely edentulous patients were selected for this study. Lateral cephalometric radiograph was taken for each patient and the cephalometric films were traced. The result obtained indicated that the cephalometric occlusal plane determined by the quadrilateral analysis was the only plane which tends to be parallel with the artificial occlusal plane. The statistical analysis showed that there was no significant correlation between the artificial occlusal Cook's plane angle and the artificial occlusal-Frankfort horizontal plane angle

Acrylic Denture base resins reinforced with glass fibers

This investigation was carried out to study the effect of incorporating different percentages of glass fibers on transverse strength, modulus of elasticity, deflection, and toughness of heat-cured and autopolymerizing acrylic denture base materials. Different percentages of loose, random and short cut glass fibers [0%,1%,2%,3%,5% and 10%] were incorporated into acrylic denture base resins. The results showed that the incorporation of 1% of glass fibers into the heat-cured acrylic resin increased transverse strength by some 31 percent. While the addition of 2% of glass fibers increased the transverse strength of the autopolymerizing acrylic resin by some 40 percent. The incorporation of more than 3% glass fibers into both types of acrylic resin had no significant effects on the transverse strength, modulus of elasticity, defection and toughness of both tasted materials [p>0.05]. The glass fibers had better effects on autopolymerizing acrylic resin rather than on heat-cured acrylic resin

Microwave disinfection of some acrylic denture base materials

The purpose of this study was to evaluate the disinfection of self and heat cured acrylic resins after the exposure to the microwave for different periods of time. The effect of microwave disinfection on transverse strength, modulus of elasticity and surface roughness of acrylic denture base resins was investigated. The results showed nonsignificant differences between transverse strength and modulus of elasticity of both tested materials upon the exposure to microwave for different periods of time. The self cured denture base material showed greater surface roughness than heat cured acrylic resin

Patient's individual skeletal pattern: a new concept in complete denture construction

From the data discussed, it was concluded that it would be well to consider the patient's individual skeletal pattern as the basic principle in determining the vertical height and occlusal plane of a complete denture. The use of the proposed technique, based on cephalometrics and quadrilateral analysis, is a precise scientific and clinically reliable method in this field

Using tissue conditioning material for functional contouring of the palatal vault for improving speech with complete dentures

A new method for using tissue conditioning material to physiologically contour the palatal vault of maxillary dentures was described. This study was carried out on 5 patients, 2 indentical maxillary complete dentures were constructed for every patient against mandibular one. The first denture had its palatal surface contoured functionally using tissue conditioning material, while the second denture was conventional with highly smooth and polished palatal surface. The speech of every patient was tested at one hour, one week, one month, and two months after insertion of each denture. The results showed that the immediate speech achieved by the modification of the palate was much more normal and the training period after its insertion was eliminated

Effect of diabetes mellitus on topographic changes in structure supporting maxillary complete denture

Several studies have been carried out on the histologic and mophologic changes in the structure supporting complete dentures. Nothing was reported in the literature about the effects of Diabetes Mellitus on the morphology of the structures supporting complete dentures. The aim of this work was to study the topographic changes in the denture bearing area in non-diabetic and diabetic patients. The results showed that complete dentures caused reduction in the heights of the ridges in diabetic and non-diabetic patients. However, than reduction in heights of the ridges in diabetic group was greater thar. that in the non-diabetic group. More reduction in the heights of the ridges took place in the premolar and first molar rather than in the second molar regions