Nihon Kyosei Shika Gakkai zasshi = The journal of Japan Orthodontic Society最新文献

{"title":"[Case of skeletal open bite treated with orthognathic surgery, with special reference to morphological and functional analysis of the tongue].","authors":"Y Koh,&nbsp;M Tsuchiya,&nbsp;S Adachi,&nbsp;K Yoshida,&nbsp;M Sakuda","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Malfunction and abnormal posture of the tongue has been thought to be one of etiological factors for skeletal open-bite at length. In this study, an adult female patient with anterior open-bite is reported, who has been treated by means of posterior maxillary osteotomy and has obtained a good occlusion and profile, which is stable throughout the retention period. Electromyography was obtained from the tongue muscles by surface electrodes and the tongue muscle activity during deglutition was measured before and after surgery. The tongue posture was also analyzed on the basis of the roentgen cephalogram with the mandible at the rest position. Larger tongue muscle activities during swallowing was revealed compared to the control subjects. In addition, anteriorly and superiorly positioned tongue was seen in the initial stage. The amplitudes of the tongue muscle had decreased and tongue posture had shifted posteriorly and inferiorly following surgery, which approximated to the those observed in the control subjects. These improvements of the abnormal activity and posture of the tongue and the stability of occlusion after surgery confirmed that posterior maxillary osteotomy is an effective surgical operation for the anterior open-bite patients in terms of prognosis.</p>","PeriodicalId":76235,"journal":{"name":"Nihon Kyosei Shika Gakkai zasshi = The journal of Japan Orthodontic Society","volume":"48 6","pages":"623-34"},"PeriodicalIF":0.0,"publicationDate":"1989-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13782672","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":"[Study of bone remodeling mechanism induced by mechanical stress. Differentiation of osteoclasts induced by compressive force in newborn rat cultured long bone].","authors":"M Chiba","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The purpose of this investigation was to reveal the mechanism of differentiation of osteoclast (OC) induced by mechanical stress in long bone cultivation of new born rats. A long bone was loaded with 30 gf of continuous compressive force and cultured for 5 days in CO2 incubator. Numbers of OC increased in the long bone were counted after H-E staining and compared with the control. The study was dealt with the effects of recombinant tumor necrosis factor alpha (rTNF alpha), recombinant interleukin-1 beta (rIL-1 beta), prostaglandin E2 (PGE2) and the co-cultivation of osteoblast (OB) originated from new born rat calvariae, as to differentiation of OC. Since the bone remodeling was interacted with OB and bone marrow (BM) cells, the activity of alkaline phosphatase (ALPase) was also investigated for OB in co-cultivation with BM cells originated from new born rat long bones. In the region of diaphysis of a long bone loaded with compressive force, the bend of trabecular bones was noticed after 3 days incubation. Also, the enrichment of monocyte-macrophage (Mo-M phi) lineage cells was noticed along the trabecular bones. After 5 days incubation, the increase of the number of OC was specifically recognized. The increase of the number of OC was shown in medullary cavity of the long bone by addition of rTNF alpha to the culture medium, but any synergistic effect was not shown with the treatment of rTNF alpha and compressive force to the increase of the number of OC. Furthermore, the increase of the number of OC induced by compressive force did not suppressed by addition of anti-TNF serum. Under the treatment of rIL-1 beta or PGE2, OC slightly increased in the long bone when loaded by compressive force, but the treatment of indomethacin did not suppress it completely. However, the increase of OC in the long bone loaded by compressive force was clearly inhibited in co-cultivation with OB. On the other hand, the activity of ALPase of OB was markedly abated in co-cultivation with BM cells. These results indicated that the mechanism of differentiation of OC induced by mechanical stress was different from that induced by the general inflammation. Results also indicated that it was controlled mainly by the factor(s) or interaction between BM cells and OB and was associated with Mo-M phi lineage cells.(ABSTRACT TRUNCATED AT 400 WORDS)</p>","PeriodicalId":76235,"journal":{"name":"Nihon Kyosei Shika Gakkai zasshi = The journal of Japan Orthodontic Society","volume":"48 6","pages":"585-600"},"PeriodicalIF":0.0,"publicationDate":"1989-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13782669","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":"[Application of the finite element method to craniofacial growth analysis. 4. Three-dimensional application of tensor analysis].","authors":"M Motoyoshi,&nbsp;T Yamazaki,&nbsp;K Inoue,&nbsp;Y Akano,&nbsp;M Lin,&nbsp;S Namura","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The purpose of this study is the 3-dimensional application of finite element method to analyze the craniofacial growth. In our previous studies, 2-dimensional finite element method was applied to analyze and to predict the craniofacial growth. In case of 2-dimensional application, the normal and shear strains were given by the displacements u, v that were linear functions of coordinates x, y. In the 3-dimensional case, six strain components are required to obtain the extension ratio and the directions of three-principal axes. In this study, for the 3-dimensional application, four-noded, pyramidal elements were used and twelve 3-dimensional elements were constructed. Materials were longitudinal frontal and lateral cephalometric X-rays of 4 males and 4 females from 7 to 10 years with normal occlusions. 3-dimensional coordinates of each nodal points were calculated by transforming 2-dimensional coordinates on the frontal and lateral cephalometric X-ray films. Coordinates of the nodal points at 7 years were standards against that results of the finite element method from 8 to 10 years were obtained. They were subjects of the analysis that elements equivalent to the cranial base, the maxillary portion, the maxillary alveolar portion and the posterior pharyngeal portion. Summarized results were as follows. 1. It was observed that the similar figured extension of the anterior cranial base element. 2. The posterior cranial base element extended to right, anterior and upwards direction. 3. On the maxillaly elements, especially, lateral extensions appeared. 4. The element of the posterior pharyngeal portion extended to left and downwards direction. 5. The elements of the maxillary alveolar portion extended to downwards directions. From the above, the directions of transformation of the elements that are selected with voluntary nodal points can be observed. Therefore, 3-dimensional tensor analysis is a method of great significance for obtaining new findings of the craniofacial growth.</p>","PeriodicalId":76235,"journal":{"name":"Nihon Kyosei Shika Gakkai zasshi = The journal of Japan Orthodontic Society","volume":"48 5","pages":"521-34"},"PeriodicalIF":0.0,"publicationDate":"1989-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13784325","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":"[Follow-up study of bone grafts to the alveolar clefts].","authors":"K Yamauchi,&nbsp;Y Maruta,&nbsp;K Uemura,&nbsp;G Ito","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Clinical follow-up study after the grafting with fresh autogenous iliac bone to the alveolar clefts in cleft lip and palate patients was carried out up to 2 years post operation. Twenty two patients were examined, to whom grafts of iliac cortical or iliac marrow bone was carried out by the First or the Second Department of Oral Surgery, Kagoshima University Dental School from July, 1985 to April, 1988. Their cleft types were classified as 18 unilateral and 4 bilateral cleft lips and palates. The ages at bone grafting were ranged from 8 years 9 months to 17 years 6 months, and the average of which was 12 years 3 months. Nine of these patients were grafted with the cortical bone, and the other 13 were grafted with the marrow bone. The perforations at alveolar clefts were covered with the tongue flap in 10 clefts of 10 patients, while they were covered with the local mucous flap in 15 clefts of 12 patients. Among these patients, dental casts, X-ray radiograms and oral pictures of 15 patients were surveyed postoperatively. Results were as follows: 1) Contours of the alveolar clefts were well corrected in 9 patients, especially in those cases of pre-operatively expanded unilateral clefts, grafted with the marrow bone and covered with the local mucous flaps. 2) The viable rate of grafted bone was 100.0% for the marrow bone, while it was 62.5% for the cortical bone.(ABSTRACT TRUNCATED AT 250 WORDS)</p>","PeriodicalId":76235,"journal":{"name":"Nihon Kyosei Shika Gakkai zasshi = The journal of Japan Orthodontic Society","volume":"48 5","pages":"546-52"},"PeriodicalIF":0.0,"publicationDate":"1989-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13842001","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 two stage corticotomy on maxillary protraction].","authors":"Y Matsuda","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>For the purpose of clarifying the effects of two stage corticotomy on maxillary protraction, experimental studies by using of 5 male Japanese monkeys (Macaca fuscata) were performed. Results from cast analysis, roentgenographic cephalometry and histological examinations were as follows. I. In experimental groups that received two stage corticotomy with maxillary protraction, apical base of maxillary bone protruded markedly. II. In control groups that maxillary protraction was applied without corticotomy, sutured area around maxilla seemed to be influenced by orthopedic force. However, hardly any influence from orthopedic force was seen in experimental groups. III. In both groups individual teeth of upper dental arch hardly moved. IV. After two stage corticotomy, no circulatory disturbance in maxillary bone except for reactive inflammation of pulp in anterior teeth and vacuolar degeneration in anterior teeth and posterior teeth was seen, and periodontal tissue remained almost unaffected. This suggested that corticotomy should be performed carefully, especially in anterior apical base of maxillary bone.</p>","PeriodicalId":76235,"journal":{"name":"Nihon Kyosei Shika Gakkai zasshi = The journal of Japan Orthodontic Society","volume":"48 5","pages":"506-20"},"PeriodicalIF":0.0,"publicationDate":"1989-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13784324","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":"[Biodegradable ceramic as a bone graft substitute followed by orthodontic tooth movement].","authors":"M Z Hossain,&nbsp;T Yamada,&nbsp;K Yamauchi","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>This study was performed to evaluate the histological changes during remodelling of autogenous PMCB (particulate marrow and cancellous bone) and TCPC (beta-tricalcium phosphate ceramic) when transplanted into the jaw bone defects, and also to investigate the possibility of orthodontic tooth movement on them. Twenty dogs were used in this study. Following extraction of the upper 2nd and 3rd incisors, or only the 2nd incisor, maxillary alveolar bones were resected bilaterally. Autogenous PMCB obtained from the ilium and TCPC (Synthograft, Miter, Inc. U.S.A.) were grafted in each resected area. Nine dogs were sacrificed without applying the orthodontic force, whereas the rest of dogs were sacrificed after applying orthodontic force. Sectional arch wire with open coil spring was placed between the upper 1st incisors for tooth movement. Applications of orthodontic force were started anywhere from the 2nd to the 8th week following the grafting and continued for different experimental periods. Sections of maxillary bone including the grafted areas were prepared for light microscopy. It was observed that Synthograft area showed better organization than the bone graft area initially. However, later around the 8th week, both graft materials were well organized. The Synthograft was well accepted by the host tissue. The Synthograft filled area reconstructed the bony architecture more similar to the alveolar bone than the bone graft area. In addition, the radiological findings also showed orthodontic tooth movement through the PMCB and the Synthograft areas. Capability of orthodontic tooth movement at the Synthograft areas without any undue result is of significant clinical value. Thus in view of above points in conclusion it is suggested that, TCPC is a competent substitute for PMCB in filling up alveolar bone defects, even, in cases where orthodontic tooth movement is desirable.</p>","PeriodicalId":76235,"journal":{"name":"Nihon Kyosei Shika Gakkai zasshi = The journal of Japan Orthodontic Society","volume":"48 5","pages":"483-95"},"PeriodicalIF":0.0,"publicationDate":"1989-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13784322","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":"[Apical root resorption of maxillary central incisors following orthodontic treatment].","authors":"A Togari","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>This research shows the relationship between orthodontic treatment and apical root resorption. The latest edgewise appliance with a pre-adjusted bracket (Alexander method) was used in the present experimentation. Examination by roentgen cephalometry and intraoral radiography was performed before and after the maxillary central incisors had been moved orthodontically. The conclusion is that there was no significant difference among the grade 0, 1, 2 and 3 of apical root resorption in the change of long axis inclination of the maxillary central incisors. But there was a significant difference among the grade 0, 1, 2 and 3 of root resorption in the distance of the apical root movement. The most apical root resorption was observed when the apical root was moved lingually.</p>","PeriodicalId":76235,"journal":{"name":"Nihon Kyosei Shika Gakkai zasshi = The journal of Japan Orthodontic Society","volume":"48 5","pages":"535-45"},"PeriodicalIF":0.0,"publicationDate":"1989-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13784326","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":"[Morphological study on open bite patients].","authors":"T Tsuchida,&nbsp;T Morimoto,&nbsp;N Inoue,&nbsp;S Hayashi,&nbsp;T Imai,&nbsp;M Takeuchi,&nbsp;S Nakamura","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The purpose of the present study is to investigate the morphological features of open bite patients who have also disharmony of anteroposterior relations between maxilla and mandible. Lateral head films of 40 adult females with open bite were used. The samples were classified into three groups by ANB angle. Three groups were as follows. 1. Type I open bite (12 subjects, 1 degree less than or equal to ANB less than or equal to 4.5 degrees). 2. Type II open bite (13 subjects, ANB less than 4.5 degrees). 3. Type III open bite (15 subjects, ANB less than 1 degree) The normal samples was the longitudinal data of females in our department. Skeletal and dental variables were calculated and compared norm versus type I open bite, type I open bite versus type II open bite and type I open bite versus type III open bite, respectively. The following results were obtained. 1. Disharmony of the vertical dimensions in type I open bite was mainly due to long anterior lower facial height which was accompanied by large gonial angle as compared with norm. 2. There were no difference in anteroposterior position of the maxilla and nasal floor in all three open bite groups. 3. There were no difference in anterior and posterior facial height between type I and type II open bite. However, type II open bite showed the backward rotation of the mandible accompanied by over eruption of upper first molars. 4. Type III open bite showed longer anterior lower facial height which was caused by excessive mandibular growth than type I open bite. 5. Upper incisors showed labial inclination as compared with norm in all three open bite groups. However, lower incisors showed labial inclination in type II open bite and lingual inclination in type III open bite as compared with type I open bite. As a result, the inter-incisal angle was small in type II open bite and large in type III open bite as compared with type I open bite. These results suggested that the dentoalveolar factors were large in type II open bite and the skeletal factors were large in type III open bite as compared with type I open bite.</p>","PeriodicalId":76235,"journal":{"name":"Nihon Kyosei Shika Gakkai zasshi = The journal of Japan Orthodontic Society","volume":"48 5","pages":"496-505"},"PeriodicalIF":0.0,"publicationDate":"1989-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13784323","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":"[Repositioner of external fragment of mandibular ramus (ramus repositioner) in sagittal split ramus osteotomy of mandible].","authors":"S Koubayashi,&nbsp;M Nakagawa,&nbsp;T Shimomura,&nbsp;R Susami","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In sagittal ramus split osteotomy of the mandible, rigid internal fixation of the fragments with screws has become one of the main fixation techniques. This screw-fixation has the advantages to reduce the period of intermaxillary fixation which is unpleasant for patients. On the other hand, it is necessary that the condyles are exactly positioned to the glenoid fossa after surgical correction. Incorrect repositioning of the mandibular ramus will induce serious problems, e.g. relapse caused by mandibular movement, pain of temporomandibular joint, occlusal dysfunction, etc. Some surgeons make efforts to avoid the problems by various methods. Postoperative radiographs are one of the procedures, which taken while the patient is on the operating table. Various appliances are also used for the purpose of repositioning ramus at operation. We have devised a simple appliance that allows the surgeon to be sure that the position of the external fragments of the mandibular ramus will be precisely established. We named this appliance \"ramus repositioner\". It consists of 1.2 mm orthodontic wire in diameter, cold-cure acrylic resin and titanium mini-plates. It is fabricated and tried to fit prior to the operation. At operation, both ends of its orthodontic wire are inserted into the tubes on the buccal surfaces of the maxillary first molars. The positions of the mandibular ramus involved condyles are recorded by mini-plates on this appliance with its exclusive self-tapping screws preoperatively. Then the appliance is removed and mandible is splitted. After splitting, the appliance is replaced with the screw hole landmarks that tapped before.(ABSTRACT TRUNCATED AT 250 WORDS)</p>","PeriodicalId":76235,"journal":{"name":"Nihon Kyosei Shika Gakkai zasshi = The journal of Japan Orthodontic Society","volume":"48 5","pages":"553-9"},"PeriodicalIF":0.0,"publicationDate":"1989-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13782668","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":"[Dentofacial morphology of obstructive sleep apnea syndrome patients].","authors":"S Koubayashi,&nbsp;A Nishida,&nbsp;M Nakagawa,&nbsp;Shoda,&nbsp;K Wada,&nbsp;R Susami","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Sleep apnea syndrome is a condition characterized by recurrent interruption of breathing during sleep. Triad of symptoms for the disease are insomnia, daytime sleepiness and snoring. Recently, the patients complained of these symptoms have progressively increased. And so serious attention has been given to investigate the entity of this new clinical syndrome in medical and dental aspects. Three types of sleep apnea are classified; central, obstructive and mixed type. Most of patients identified this syndrome include obstructive or mixed types of sleep apnea. Obstructive sleep apnea has been presumed to have close relationships with obesity, micrognathia, retrognathia, tonsillary hypertrophy, tongue hypertrophy and so on. This study was designed to evaluate the characteristics of the dentofacial morphology in the obstructive, included mixed, sleep apnea syndrome (OSA) patients. The samples consisted of 25 adult male patients (average age of 48 years 2 months) with OSA as diagnosed by the division of respiratory disease, department of internal medicine, Kanazawa Medical University Hospital. One lateral radiographic cephalogram with the teeth in occlusion and the recording of somatic measurements, body weight and height, were obtained for each patient at visiting our orthodontic clinic. On the lateral cephalograms of whole samples, 10 angular and 6 linear measurements were carried out. Simultaneously, the body mass index (BMI) was assessed for each patient. Based on the cephalometric and somatometric measurements, the pathogenesis of obstructive sleep apnea was discussed in association with the obesity and dentofacial morphology. Results were summarized as follows: 1. The body mass index (kg/m2) ranged between 21.0 to 45.7, with a mean value of 31.0 for OSA patients. Of whom, 3 patients were mildly obese (25 or more of BMI) and 12 patients severely obese (exceeding 30 of BMI). 2. Compared with normal control samples, the means of cephalometric variables of whole samples showed the tendency of micrognathia, large gonial angle, protruded maxilla and large cranial base. 3. By principal component analysis, it was revealed that the components for the shape and position of the mandible were of more importance in OSA patients than controls. 4. Discriminatory analysis clarified significant differences in dentofacial morphology between 12 obese and 13 non-obese patients. 5. The dentofacial morphology in non-obese patients were characterized by retrognathia, micrognathia, large gonial angle and small maxilla. In accordance with previous reports, the patients with OSA were presented the tendency of obesity and micrognathia. Furthermore it was revealed that particularly in non-obese OSA patients the morphological abnormalities might be the major contributor to the pathogenesis of sleep apnea.</p>","PeriodicalId":76235,"journal":{"name":"Nihon Kyosei Shika Gakkai zasshi = The journal of Japan Orthodontic Society","volume":"48 4","pages":"391-403"},"PeriodicalIF":0.0,"publicationDate":"1989-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13783662","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}