Because polymethylmethacrylate resin (PMMA) dentures are dried and shrunk by storage in air, the dentures must be stored in water. However, deformation by storage in air and the recovery of the deformation by water absorption is inaccurate. With polycarbonate resin (PC) and polysulfone resin (PSF), it is thought that storage in air and disinfection by boiling follow from their physical properties. In this research, we examined the deformation of PMMA, PC and PSF by storage in air, followed by water absorption and boiling.
Specimens were constructed with PMMA resin by microwave polymerization, and with PC resin and PSF resin by compression molding. After we stored specimens marked with measurement points or bonded strain gauges in the humidistat for 24 hours, we stored these specimens in 37°C warer for 42 days. We measured the changes of the specimen's size and weight, and the strain behavior during storage. Measurements were also taken during boiling and reboiling by the same method.
PMMA shrank greatly on storage in air. The amount of shrinkage decreased greatly by storage in water in water in one day, but did not recover completely 42 days later. Neither PC nor PSF were deformed into PMMA by storage in air. It was confirmed that PMMA could not be boiled, because PMMA greatly deformed by boiling. Both PC and PSF were not deformed by boiling.

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Flurbiprofen (FP), a nonsteroid anti-inflammatory drug, was orally administered to healthy adults for three days, and blood concentrations of the drug were measured to calculate pharmacokinetic parameters. The obtained plasma concentrations were fitted using a one-compartment model, and prediction values of blood concentration were calculated for the healthy adults, elderly outpatients, and bedridden elderly persons. Prediction performance was calculated from the prediction valuse and measured values of blood concentration. Moreover, the efficacy of the drug after tooth extraction was also assessed. The results obtained are as follows:
1. When FP was given to healthy adults days at a dose of 40mg, the elimination rate constant (kel), absorption rate constant (ka), and distribution volume (Vd) resulted in 0.25±0.06h^-1 (mean±SD), 0.98±0.67h^-1, and 4.29±1.05L, respectively; and the mean of t_1/2, T_max, and C_max were 2.7 hours, 1.9 hours, and 5.8μg/ml, respectively.
2. FP was administered to elderly outpatients and bed ridden elderly persons for comparison with the healthy adults. In the healthy adults, prediction values agreed closely with the measured values. On the other hand, prediction values were consistent with, higher than, or lower than the measured values among the elderly outpatients at almost equal ratios. In the bed ridden elderly persons, their measured values were generally higher than the prediction values, without marked variances.
3. None of the cases examined developed pain.

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We encountered a rare case of an impacted third molar at the medial side of the mandibular notch on the right side. The patient was 72-year-old female, and the impacted tooth was incidentally found by orthopantomography, which had initially been taken to investigate pericoronitis of the upper third molar on the left side. After inflammation subsided, the upper third molar on the left side was extracted. We will continue to observe the impacted tooth in the mandible on the right side, and if there is any infection, extraction may be an option.

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[in Japanese]

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High quality dental treatment and community dental service in neighborhoods where disabled, elderly, and medically compromised patients are recuperating is crucial for the improvement and lifelong maintenance of the oral health of community inhabitants.
The purpose of this study was to determine the present state of dental treatment and/or oral health needs of disabled, elderly, and medically compromised patients in the home environment.
Care Managers working for the municipality sent a systemic/dental health questionnaire to 120 people (35 male and 85 female, average age 80.0 years old, 7.7 SD) who had applied for Long-Term Care Insurance Benefit in Higashikurume City. We confirmed by telephone if the persons were certified as “need-for-care” and the level/category of care needed by each person as determined by the Long-Term Care Certification Committee in the municipality.
In our investigation of the relation between dental conditions and CNN (category of care needed) of the applicants for Long-Term Care Insurance Benefit; the results obtained were as follows.
1. The Relation between Dental Conditions and CNN.
a) The Oral/Denture condition of 50 of 120 individuals (41.7%) who applied for Long-Term Care Insurance Benefit had was normal, while 70 of 120 individuals (58.3 %) had problems.
b) Eighty-eight of 120 individuals (73.3%) were “I can eat normal food”, while 16 of 120 individuals (13.3%) were “I can eat soft food”. As the level of CNN decreased, the rate of “normal” tended to decrease and the rate of “soft” tended to increase.
c) Seventy of 120 individuals (58.3%) could swallow food and water ordinarily, and 33 of 120 individuals (27.5%) sometimes choked when trying to swallow. As the level of CNN decreased, the rate of “sometimes choked” tended to increase.
2. The Relation between CNN and the Dental Treatment Environment during recuperation.
a) During their period of recuperation, 71 of 120 individuals (59.2%) were “provided” with dental treatment. As the level of CNN decreased, the rate of “provided” tended to decrease.
b) Sixty of 120 individuals (50.0%) had “his/her (own) dentist”. As the level of CNN decreased, the number of individuals who had “his/her dentist” tended to decrease.
c) To receive their dental treatment, 48 of 74 respondents (64.9%) from 71 individuals were “went to a clinic in the city”, and 17 of 74 respondents (23.0%) were“went to a clinic outside the city or to a dental department in a hospital”. As the level of CNN decreased, the rate of “a clinic in the city” tended to decrease and the rate of “a clinic outside the city or a dental department in a hospital” tended to increase. Three respondents out of 74 (4.1%) received house calls from dentists “at home” or “at an establishment”. The results suggest that;
· It was possible to deduce that the level of care required (CNN) was often related to the patients'dysphagia and/or the dental treatment environment.
· Improvements in the dental treatment environment were required; it is very important that the patients and their families maintain relations with “his/her (OWN) dentist” over the lifetime of the patient.
· Especially it is necessary to have a more effective, multi-functional and costeffective system in the community. Even when the patients' level of care required (CNN) decreases, it is crucial to provide dental services in the neighborhoods where the patients are recuperating.

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