Ryuichi Hisanaga

Learn More
The occurrence of accidental ingestion/aspiration and preventive measures were investigated at Tokyo Dental College Chiba Hospital. In addition, the characteristics of accidents at our hospital were analyzed by surveying the awareness of accidental ingestion/aspiration to utilize the data for prevention. Accidental ingestion accounted for about 30% of(More)
We used porous sapphire dental implants made of alumina clinically for 4 years 1 month, commencing September, 1984 until September, 1988. Subjects consisted of 18 men and 42 women 20-71 years old (mean age: 35 years). Sixty-five implants were inserted in 60 patients. Of these, 20 were clinical cases of an implant connected with natural teeth and 45 were(More)
Bioceram Porous Implants using alumina are manufactured by Kyocera Corp. We started to use this implant in September of 1984. The subjects were 18 men and 42 women 20 to 70 years of age. We have followed up 65 implants in 60 patients for up to 13 years and 6 months. One implant in 1 patient had to be removed because of post-operative infection and 4(More)
The technology of physicochemical surface modification is available for enhancing the bioactivity and osseointegration capability of tetragonal zirconia polycrystal (TZP). Hydrophobicity index and electrical charge play important roles in protein adsorption. We previously studied the mechanism underlying the adsorption of bovine serum albumin (BSA) on the(More)
The goal of the present study was to clarify the status of training in clinical dentistry at training facilities belonging to Tokyo Dental College by investigating trainee quota fill rates and analyzing the relationship between selection of training program and subsequent career pathway. The trainees were divided into 4 groups based on career pathway after(More)
The purpose of the present study was to investigate the relationship between mastication and head posture using foods with different degrees of hardness. A total of 12 healthy, dentulous volunteers participated in the study. Each participant was required to chew two types of gummy candy with two levels of hardness while sitting upright. Measurements were(More)
The patient was a 46-year-old woman requesting oral hygiene control. She had been treated for Parkinson's disease at the neurology department of another university hospital for 9 years. When the drugs were effective (drug efficacy), she could get out of bed and change clothes without assistance, albeit slowly. When the drugs were ineffective (no drug(More)
The purpose of this study was to investigate the influence of anteroposterior postural change on electromyography (EMG) activity in the lateral pterygoid muscle. Subjects consisted of 7 patients attending this hospital for close examination. The inferior heads of the lateral pterygoid and masseter muscles were chosen as evaluation sites. For the EMG(More)
The aim of this study was to investigate cases of accidental ingestion or aspiration occurring at Tokyo Dental College Chiba Hospital over the last 4 years in order to determine how the incidence of such events could be reduced. Forty cases of accidents occurring at our hospital over a 4-year period commencing in 2008 (representing 27% of the total number(More)
  • 1