Publications by authors named "Masanobu Wakami"
Article Synopsis
- Jaw and neck muscles are activated differently during chewing depending on the hardness of the gum, but the exact effects on their coordination are not fully understood.
- This study analyzed how chewing soft vs. hard gum affects jaw and neck muscle activities using advanced EMG techniques in 18 healthy participants.
- Results showed that while the power of muscle activity increased with hard gum, the coordination and rhythmic patterns of jaw and neck muscles remained unchanged between soft and hard chewing.
Article Synopsis
- - An 83-year-old man with bleeding gums was thought to have a benign tumor in his upper gingiva, leading to surgical removal of the lesion.
- - The removed tissue was analyzed and found to contain ulcerative granuloma and bacterial colonies, indicating an unusual case of orofacial actinomycosis.
- - DNA testing (PCR) confirmed the presence of actinomycosis, which helped in accurately diagnosing the condition as a pyogenic granuloma associated with the infection.
In the application of lasers in dentistry, there is a delicate balance between the benefits gained from laser treatment and the heat-related damage arising from laser irradiation. Hence, it is necessary to understand the different processes associated with the irradiation of lasers on dental materials. To obtain insight for the development of a safe and general-purpose laser for dentistry, the present study examines the physical effects associated with the irradiation of a near-infrared free-electron laser (FEL) on the surface of a commonly used silver dental alloy.
View Article and Find Full Text PDFThis study examined the effects on the bond durability of resins arising from the application of adhesive agent on porcelain surface, silanated by a ceramic primer consisting of gamma-methacryloxypropyltrimethoxysilane (gamma-MPTS), by comparing shear bond strengths before and after thermocycling. When an adhesive agent was applied to a porcelain surface which had been silanated by a ceramic primer for 10 seconds, a significant reduction in resin bonding durability was observed. Extending the silanating period of the ceramic primer to 60 minutes resulted in an increase in resin bonding durability to the porcelain surface.
View Article and Find Full Text PDFPurpose: The effects of bleaching times, types of etching agent and storage period of bleached bovine tooth on the shear bond strength of resin cement to the enamel were examined.
Materials And Methods: Bovine teeth were repeatedly bleached 0, 1, 3, and 5 times then stored in 37 degrees C water for 1 week. The effect of bleaching number of the bovine tooth on the bond strength of resin cement to the enamel was investigated using 40% phosphoric acid (EG) etching technique.
[Improvement of aesthetics by porcelain laminate veneers].
Nihon Hotetsu Shika Gakkai Zasshi
January 2006
Patient: The patient consulted our department with a chief complaint of aesthetic problems due to anterior tooth discoloration. Since improvement by bleaching was considered impossible, porcelain laminate veneer restorations were performed.
Discussion: Insertion took too long for the patient's satisfaction due to the repetition of color adjustment and recontouring.