Matsumoto Dental University Repository
Not a member yet
2206 research outputs found
Sort by
音声周波数の3次元表示とその評価
Get PDFapplication/pdfThe correlation between the quality of speech and denture morphology is of importance in phonetic research in prosthodontics. Speech spectrograms contain significant information about the quality of speech, and thus together with computer analysis can be used for making an objective diagnosis of the phonetic qualities of dentures. It is important, however, that such spectrographic analysis is backed up by auditory and articulatory informati on. The purpose of this study is to analyze the effects on speech sounds caused by alterations of the oral cavity environment with an experimental maxillary complete coverage resin plate. Using three-dimensional spectrogram of laryngeal sound waves, the duration of consonant sounds with and without the plate were compared.journal articl
本学小児歯科外来患者の実態調査
Get PDFapplication/pdfIn order to improve the quality of regional pedodontic care in the future, a total of 8,295 children (4,252 male and 4,043 female) out of the 10,576 new patients who visited the Pedodontics Clinic of Matsumoto Dental College Hospital during the ll years from 1976 to 1987 were investigated with regard to changes in nursery environment, daily habits, and incidence of caries. The results are as follows. 1) The annual number of new patients, using 1976 as an index of 100, reached a peak of 108.7 in 1978, but thereafter decreased overall with a significant drop to 39.8 observed in 1987. 2) The share of patients coming from the immediate region of Shiojiri city was uniformly high, and the distribution of the age at first visit was stable, over the entire 11-year period. 3) Whereas the highest proportion of new patients each year came for treatment of caries as the chief complaint, the visits by such children accompanied by pain decreased annually. 4) The ratio of patients who visited for regular oral checkups increased over time. 5) The incidence of caries peaked in 1980, followed by a marked decrease and lessening of symptoms. 6) With regards to the nursery environment, the ratios of breast-feeding and regulated intake of snacks were observed to increase. Brushing twice daily or before bedtime also increased. 7) The experience of topical application of fluoride significantly increased over time.journal articl
Oral Findings in Severely Handicapped Patients Participating in the Periodic Dental Check-up System for Five Years Dental Caries, Gingival Recessions and Hyperplasias,
Get PDFapplication/pdf重症心身障害者に対する適切な歯科的健康管理の確立を目的とし,国立療養所に入院中の重症心身障害者140名について,歯科的管理を5年間にわたって行った後の翻蝕と歯周疾患について調査を行った.1.全面介助による1日2回のブラッシングが習慣化されていた.介助する時の職員のブラッシング方法は,64.3%が横磨きであった.2.介助によるブラッシングにおおむね適応している者は85.0%であった.しかし2.1%の者は,ひどく嫌がって前歯も磨かせなかった.3.平均OHI-Sは1.53で,部位別に清掃状態をみると,上顎前歯部唇面が最も良く,下顎左側臼歯部舌面が最も不良であった.4.1人平均DMF歯数は,12.51歯,DMF歯率48.2%であった.そのうち1人平均の未処置齲蝕歯は,2.07歯であり,歯科治療体制を含む歯科的健康管理の確立によって,齲蝕の問題はほぼ解決できていると思われた.5.歯肉増殖・肥大は,19.3%の者に認められた.そのうちフェニトイン服用者の歯肉増殖発現率は,38.5%であった.6.限局型歯肉退縮は,10.7%の者に認められ,下顎前歯部唇側歯肉に最も多く,介助者の横磨きとの関連が示唆された.7.歯周治療の要求度(CPITN)をみると,全く歯周治療の必要のない者は10.8%で,なんらかの治療が必要となる者は89.2%であった.journal articl
河北省における地方性弗素中毒の疫学的調査分析
Get PDFapplication/pdfEndemic fluorosis is prevalent in many areas of Hebei Province, China, and represents a considerable health hazard for the local population. An investigation was accordingly conducted from 1980 to 1982 to determine the fluoride concentration in the drinking water, soil, crops, and atmosphere, as well as the fluoride level in human urine and the prevalence of mottled enamel and osteosclerosis, Patients with endemic fluorosis numbered 5,672,539 persons living in 126 cities, 1,200 communes, and 10,727 villages throughout the province. These patients represent 10% of the total resident population. The high incidence areas divide geographically into plateaus, mountains, basins, plains, and coastal regions, Most of the sources of drinking water showing high fluoride levels were shallow wells, although some deep wells, springs, and rivers were similarly contaminated. Fluoride concentrations were generally higher in the northern part of the province and lower in the south. No significant relation obtained between the prevalence of fluorosis and the fluoride levels in grain and vegetable crops or the atmosphere. Although atmospheric fluoride levels were higher in areas of high prevalence of fluorosis, its source was attributed to smoke from coal burned as fuel. The prevalence mottled teeth was found to increase sharply when the fluoride level in the drinking water rose above. 1.0 mg/1, and accounted for 100% of the population when the fluoride level was greater than 4.0 mg/1. In patients from areas of relatively low concentrations, the tooth enamel showed an opaque whiteness. Patients from areas of high concentrations exhibited pitted enamel. Osteosclerosis was also found to increase in severity with higher concentrations of fluoride in the drinking water. As result of this investigation, we conclude that endemic fluorosis in Hebei province is caused by high fluoride in the drinking water. Accordingly, lowering the fluoride concentra-tion in drinking water is the primary measure for preventing this condition.journal articl