Previous studies using gram-positive and -negative bacteria demonstrated that hydrolysis of silicon nitride (Si3N4) in aqueous suspensions elutes nitrogen produces gaseous ammonia while buffering pH. According to immunochemistry assays, fluorescence imaging, situ Raman spectroscopy, we demonstrate here the antipathogenic surface chemistry Si3N4 can be extended polymethylmethacrylate (PMMA) by c...

This clinical report describes a comprehensive prosthodontic treatment of young patient diagnosed with squamous cell carcinoma in hard palate. The procedures included surgical removal the tumor, immediate plate and interim obturator. prosthesis were fabricated using conventional polymethyl methacrylate resin material retention derived from wrought wire clasps to remaining natural teeth. follow-...

statement of problem: as a physical property, wear resistance of the materials used in the fabrication of orthodontic retainers play a significant role in the stability and long term use of the appliances. objectives: to evaluate the wear resistance of two commonly used materials for orthodontic retainers: acropars op, i.e. a polymethyl methacrylate based material, and 3a-gs060, i.e. a polyethy...

Squamous cell carcinoma of the eyelid is the second most common malignant neoplasm of the eye with the incidence of 0.09 and 2.42 cases/100 000 people. Orbital invasion is a rare complication but, if recognized early, can be treated effectively with exenteration. Although with advancements in technology such as computer-aided design and computer-aided manufacturing, material science, and retent...