Nichidai koku kagaku = Nihon University journal of oral science最新文献

{"title":"[Relationship between muscular palpation and three dimensional incisal path at border movement of mandible].","authors":"G Udagawa","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Temporomandibular arthrosis was diversified phases of its development as well as complicated mode of its crisis, due to which no concrete clinical diagnostic procedure has been established yet. However, a close relation of occlusal disturbance with the crisis factor is suggested, and assessments have been made in the prosthetic dentistry, setting a viewpoint at the phases of mandibular movement. Particularly, incisal path at border movement of mandible is made the object for basic assessment since it exhibits intensified condition. On the other hand, importance is attached to Krogh-Poulsen's muscular palpation for diagnosis of the pain and contraction of the masticatory muscle which occur in temporomandibular arthrosis. However, though there is a close relation between the pain or abnormal contraction of the masticatory muscle and the phases of mandibular movement, these diagnostic procedures have been the studies which have dealt with the subjects separately. And no report is seen on the study made of the relation between the phases of incisal path at border movement of the mandible and Krogh-Poulsen's muscular palpation. Accordingly, with the purpose of investigating these relationships, the author has made assessment of the relationship between the result by Krogh-Poulsen's muscular palpation and the form (analogue form) of three-dimensional incisal path at border movement of the mandible summarized and standardized by TMJ gnathological instrument which is evaluated as a recording method with high clinical efficiency as a method with excellent reproducibility of mandibular movement and favorable manipulability. The subjects enrolled were patients with temporomandibular arthrosis and the so-called normal healthy subjects with normally functioning occlusion who are not conscious clinically of the abnormality of the stomatognathic system nor had similar anamnesis. And the following results have been obtained. 1. Results by Krogh-Poulsen's muscular palpation; 1) The 59 so-called normal healthy subjects were classified into 2 groups by Krogh-Poulsen's muscular palpation, and of these, the cases in whom no abnormality was observed were only 5, being 8.5%, and the cases in whom single or multiple test items showed abnormality were 54, being so high rate as 91.5%. The occurring frequency of 5 test symptoms in the 54 cases were; 22 cases with trismus-40.7%; 34 cases with temporomandibular sounds -63.0%; 20 cases with pain -37.0%; 36 cases with tenderness of the lateral pterygoid muscle -66.7%; and 25 cases with disturbance of lateral mandibular movement -46.3%.(ABSTRACT TRUNCATED AT 400 WORDS)</p>","PeriodicalId":77579,"journal":{"name":"Nichidai koku kagaku = Nihon University journal of oral science","volume":"15 2","pages":"111-20"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13768255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Dentin after dentinal exposure in dog teeth].","authors":"K Kubota,&nbsp;T Ozaki","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The teeth of dogs in which the root dentin was incompletely formed were prepared so that dentin was exposed. Tetracycline was then injected and the teeth were studied for dentin formation after the periods of 18, 20, 48 and 76 weeks. After the dentin was exposed slightly, reparative secondary dentin was not formed in the pulp horn area; However, a considerable amount of dentin was formed at the walls of the pulp chambers and the root canals. No changes were noted in the pulp horn area in the prepared teeth in comparison with unprepared teeth. The results imply that dentinal changes in the pulp horn area caused by dentinal cutting are more closely related to the depth of dentinal preparation than to the age of the tooth and to the elapsed time after preparation.</p>","PeriodicalId":77579,"journal":{"name":"Nichidai koku kagaku = Nihon University journal of oral science","volume":"15 2","pages":"145-52"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13768902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Metrical study on teeth and mandible in Macaca fuscata fuscata. 2. Principal component analysis].","authors":"E Kanazawa,&nbsp;M Sekikawa,&nbsp;Y Kamiakito,&nbsp;T Ozaki","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Metrical investigation on teeth and mandible together was performed to understand the morphological relationship between these two components in Macaca fuscata fuscata. Measurements are 9 items from the mandible, 2 items from dental arch, and 8 mesiodistal diameters from teeth. Correlation matrix composed of 19 items, in total, was examined in males and females, respectively. Significant correlation coefficients were frequently seen among mandibular measurements and also among tooth measurements, but rarely seen between mandibular and tooth measurements. The only exception was a mesiodistal diameter of P3 which has a few significant correlations with mandibular measurements. Principal component analysis was also carried out based on the correlation matrix of 19 measurements. The first component was a size factor in which factor loadings were all positive. The second component was thought to be a factor of the mandibular size in which factor loadings were highly positive on the mandibular measurements and contrarily low on the dental measurements. It is concluded that there is no obvious correlation between general sizes of the mandible and the teeth in Macaca fuscata fuscata.</p>","PeriodicalId":77579,"journal":{"name":"Nichidai koku kagaku = Nihon University journal of oral science","volume":"15 2","pages":"138-44"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13768901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Horizontal stress of abutment. Particularly regarding difference in removable partial denture design].","authors":"S Kuwashima","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Prosthesis with removable partial denture is a daily clinical procedure for compensating the morphological loss and hypofunction of teeth and various gnathostomatic system. The removable partial denture not only comprises of many elements such as denture base, abutment and clasp but accordingly has to undergo morphologically complicated operative process, thus posing many factors concerning the functional stability coping with diverse masticatory motions. However, from the fact that retention and stability of the denture at it's functioning are obtained basically from it's connection with abutment, assessments in multiple aspects have been made regarding the influence exerted on abutment by difference in the structural elements, i. e. clasps, which transmit the movement of denture directly. There were the assessments by means of the displacement, measuring system by the use of microdial gage, stereoscopic camera, eddy currents transfer, and magnetic resistant element, and deformation measuring systems such as photoelasticity method, holography, moiré method and strain gage method. However, these systems are the methods for assessing abutment as subject but not the assessing system including all the basic structural elements of denture. Therefore, the author has made observation of the influence exerted on the dynamics of abutment by the difference between clasps in 2 kinds and by cross arch stabilization by designing aker's clasp and RPI clasp for the abutment by the use of cast frame standardized.(ABSTRACT TRUNCATED AT 250 WORDS)</p>","PeriodicalId":77579,"journal":{"name":"Nichidai koku kagaku = Nihon University journal of oral science","volume":"15 2","pages":"121-9"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13838247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Effects of aging on respiratory function: with special reference to timed vital capacity].","authors":"Y Matsumoto","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In order to study the effects of aging on the respiratory function, the examinations were made on the forced vital capacity (FVC), % forced vital capacity (%FVC), peak expiratory flow (PF), and forced expiratory volume in 1 second (FEV1.0%). A total of 427 healthy male ranging in age from 22 to 59 years served as the subjects of the present study. The following were the results of this investigations. 1. The results of the measured values for FVC, %FVC, PF and FEV1.0% by age group showed a decrease in accordance with becoming older, thus showing a negative correlation with aging. 2. The major component analysis and the discriminant analysis were made for each of the above measurement items and the discriminant function Z was obtained by the following formula: Z = 0.177 x (age) + 0.0001 x (FVC) - 0.006 x (% FVC) - 0.009 x (FEV1.0%) - 0.023 x (PF) - 5.238. The discriminant border value Z was 0.244, which divided the subjects into two groups; the young (22-37 years of age, N = 245) and the middle aged (38-59 years of age, N = 182). 3. Some discriminant features were also observed within the middle-aged group between the younger (38-49 years of age) and the older (50-59 years of age) sub-groups. In evaluating the effects of aging on the respiratory function, three age-groups rather than two (young and middle-aged) maybe useful in many respects. 4. With the young group, there observed no correlations between the aged and each of the measurement items.(ABSTRACT TRUNCATED AT 250 WORDS)</p>","PeriodicalId":77579,"journal":{"name":"Nichidai koku kagaku = Nihon University journal of oral science","volume":"15 1","pages":"12-9"},"PeriodicalIF":0.0,"publicationDate":"1989-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13765109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Energy dispersive X-ray analysis of human deciduous teeth dentin].","authors":"H Mishima","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Human deciduous molars were ground and polished in order to be examined by an analytical electron microscopy. An energy dispersive X-ray analysis system attached with a scanning electron microscope was used to analyze the teeth dentin both qualitatively and quantitatively. Calcium and phosphorus and also magnesium could be detected in the intertubular dentin of their teeth. The calcium content of the interglobular dentin was lower than those of the other part of dentin. The magnesium content was almost 4% (atomic %). The magnesium content in the dentin was higher than those in the enamel and cementum of the same specimen. It was suggested that some magnesium was contained in the dentin crystal structure.</p>","PeriodicalId":77579,"journal":{"name":"Nichidai koku kagaku = Nihon University journal of oral science","volume":"15 1","pages":"43-6"},"PeriodicalIF":0.0,"publicationDate":"1989-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13765047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Number and frequency of upper anterior artificial teeth].","authors":"Y Sakai","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>By this study, a survey has been made of the number and frequency (percentage) of the selections made by form of Trubyte Bioblend artificial teeth applied to 1,507 cases of removable denture fitted for 17 years from Number, 1971, to November, 1988, at Department of Prosthodontics, Dental hospital in Nihon Univ. School of Dentistry at Matsudo. As a result, significantly high selecting frequency was observed of all forms as: 2 forms of Square Tapering in 548 cases (36.4%) and Tapering Ovoid in 270 cases (17.9%); and by sex, single form of Square Tapering in 253 male cases (48.8%) and 2 forms of Square Tapering in 295 cases (29.9%) and Tapering Ovoid in 234 cases (23.7%).</p>","PeriodicalId":77579,"journal":{"name":"Nichidai koku kagaku = Nihon University journal of oral science","volume":"15 1","pages":"34-7"},"PeriodicalIF":0.0,"publicationDate":"1989-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13836370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Effect of driftodontics in which the method of the Vari-Simplex discipline (straight arch wire technique) was used].","authors":"O Aoshima","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In 1979, Dr. R.G. Wick Alexander visited Japan at the invitation of the Japan Orthodontics Society to introduce the fundamental concepts and techniques of The Vari-Simplex Discipline. Since then, this method had arcused keen attention in Japan. This author attended a course of this method and has applied it clinically. The paper also examines the case of 32 male and female patients from 7 to 24 years age, to validate the effect of Driftodontics stressed by this method. As a result, regarding the upper jaw, in all 8 cases of (Formula: see text) extraction in the permanent dentition, the upper infraversional canines physiologically moved to the spaces after extraction. Regarding the lower jaw, in all 6 cases of (formula; see text) extraction in the permanent dentition, the teeth moved physiologically in desirable directions of correcting crowding in lower anterior teeth. However, in all 11 cases of non extraction in the permanent dentition, there was no tendency toward such movement (Driftodontics). On the other hand, 7 cases were observed in mixed dentition, although no teeth were extracted, teeth moved in desirable directions of correcting crowding in lower anterior teeth in 6 cases, except one case. The author believes Driftodontics to become very important principles in the orthodontic treatment.</p>","PeriodicalId":77579,"journal":{"name":"Nichidai koku kagaku = Nihon University journal of oral science","volume":"15 1","pages":"25-33"},"PeriodicalIF":0.0,"publicationDate":"1989-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13765046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Survey of postgraduate education by questionnaire].","authors":"K Sibutani","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The dentists are expected to keep up with the progress of medico-dental knowledges and techniques through continuing education and practice, and to contribute to the health of the nation. In order to investigate the status quo of the dentists, a questionnaire relating to their view on postgraduate or continuing education was sent to a total of 200 dentists. The following were the results of the questionnaire. 1. Some popular ways of self-study by the dentists were to attend lectures and seminars sponsored by the dental association and to read dental journals and books at home, which comprised more than 60 percent. 2. Some topics for continuing education favored by the dentists were anesthesiology in its broad sense including emergency relief and the study of systemic control, anesthesiology in its restricted sense, oriental medicine, and other topics such as injection, medical dispute, questioning, and clinical inspection. It is noteworthy that the topics related to anesthesiology were most favored. 3. Audio-visual aids like video-tapes, which enable the dentists study by themselves at their leisure hours at home, will be a favourable ways of continuing education for busy dentists.</p>","PeriodicalId":77579,"journal":{"name":"Nichidai koku kagaku = Nihon University journal of oral science","volume":"15 1","pages":"20-4"},"PeriodicalIF":0.0,"publicationDate":"1989-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13765110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Cross sectional study of removable partial denture design in general practitioners].","authors":"S Kuwashima,&nbsp;M Nagao,&nbsp;S Ikeda","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Many reports have been made on statistical observation on prostheses, among which removable partial denture frequently becomes the subject of investigation from the two sides of cross- and longitudinal- sectional surveys, because its constituent factors are divergent. However, many of such reports used, as subject, the removable partial dentures fitted at clinical practices at the hospitals affiliated to dentistry universities (dentistry departments), and it is hard to say that these reports have grasped the actual circumstances in which removable partial denture is involved since each therapeutic principle as educational hospital constitutes its own specific environment, if the fact that difference occurs in the selecting criteria for each constituent factor according to the operators' designing conception and medical environment is taken into consideration. Then, we have made investigation of edentulous pattern and kinds of denture base material and retainers in 141 cases with removable partial denture fitted at general practitioners, and the following conclusions have been reached. 1. Among the direct retainers of free-end denture, those of clasp with distal rest (Aker's clasp) were the largest in number. 2. By base material, among the direct retainers of free-end denture, many of those of Bar type which has mesial rest (RPI clasp) were observed, in case of metal base, compared with resin base, but difference was observed in the frequency of use of the other retainers. 3. Free-end denture held a majority both in the upper and lower jaws. 4. As base material, resin base was overwhelmingly large in number, compared with metal base.</p>","PeriodicalId":77579,"journal":{"name":"Nichidai koku kagaku = Nihon University journal of oral science","volume":"15 1","pages":"38-42"},"PeriodicalIF":0.0,"publicationDate":"1989-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13836373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}