study on the effect of lower denture weight on the action potential of masseter and temporalis muscles

To study the effect of increasing the weight of the lower denture on the action potential of the masseter and temporalis muscles, 10 complete denture wearers were selected complaining of unstable lower denture. Electromyographic recording in different functional situations were done for each patient with their original denture. The weight of the lower denture was doubled and delivered to the patient to use it for three weeks. Another electromyographic recordings in the same functional situations were recorded with modified denture. From the obtained results it was concluded that, increasing weight of the lower denture affects the action potential of the masseter and temporalis muscles. Besides, increasing weight of lower denture increases muscular activity of temporalis and masseter muscles. Finally, increasing weight of the lower denture improves denture service and patient's comfort

Effect of glazing of fitting surface on retention of upper complete dentures

Poor denture hygiene was found to be one of the local predisposing factors in the pathogenesis of denture stomatitis. Denture plaque accumulation on the fitting surface of the denture was found to be a significant cause of that condition. Moreover, it was documented that rough palatal fitting surface of dentures favors plaque formation and accumulation, and makes it difficult to clean. The control of denture plaque using hygienic measures was emphasized to obtain and maintain a healthy oral mucosa in denture wearers. It was also emphasized that clinical and laboratory procedures during prosthodontic treatment and denture fabrication should be directed to provide a denture with smooth and homogeneous fitting surface to facilitate denture cleaning as one of the hygienic measures. Several trials were carried out to smooth the fitting surface of maxillary complete denture, either by s and plasting the fitting surface or by adapting a thin layer of tin foil over the cast before processing the resin material. These trials minimize plaque formation, but with varying degree of success because polishing the fitting surface may affect retention efficiency of the denture. No one up till now tried to glaze the fitting surface of complete dentures and study its effect on denture plaque accumulation and retention efficiency of complete denture. The aim of this investigation was to study the effect of glazing the fitting surface on retention efficiency of upper complete denture

study of the effect of two impression materials on loading of the soft tissues underlying tooth supported partial denture bases

The pressure exerted by tooth supported partial denture bases on the underlying soft tissues as well as the histologic changes of these tissues were investigated when alginate and silicon rubber base impression materials were used for denture construction. The mean pressure values exerted by alginate and silicon impression materials on the underlying soft tissues were 13.21 g and 23.43 g, respectively. The difference was statistically highly significant [P <0.01]. This increased pressure, however, did not induce pathological changes in the mucosal tissues underlying denture bases. On the contrary, better tissue stimulation was evident