Bulletin of Tokyo Dental College最新文献_第6页

Characteristic Distribution of Hematopoietic Cells in Bone Marrow of Xenopus Laevis. 非洲爪蟾骨髓中造血细胞的特征分布。

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Bulletin of Tokyo Dental College Pub Date : 2021-09-08 Epub Date: 2021-08-15 DOI: 10.2209/tdcpublication.2020-0053

Sumiharu Morita, Takeshi Moriishi, Satoru Matsunaga, Kei Kitamura, Shin-Ichi Abe, Akira Yamaguchi

{"title":"Characteristic Distribution of Hematopoietic Cells in Bone Marrow of Xenopus Laevis.","authors":"Sumiharu Morita, Takeshi Moriishi, Satoru Matsunaga, Kei Kitamura, Shin-Ichi Abe, Akira Yamaguchi","doi":"10.2209/tdcpublication.2020-0053","DOIUrl":"https://doi.org/10.2209/tdcpublication.2020-0053","url":null,"abstract":"Bone marrow is the principal site of hematopoiesis in mammals. Amphibians were the first phylogenetic group in vertebrates to acquire bone marrow, but the distribution of hematopoietic cells in the bone marrow of the primitive frog, Xenopus laevis (X. laevis) has not been well documented. The purpose of this study was to perform a histological investigation of the distribution of hematopoietic cells in femoral bone marrow at various stages of development in X. laevis. Hematopoietic cells showed preferential distribution on the endosteal surface of cortical bone throughout all stages of development, from tadpole to aged frog. In mature frogs, hematopoietic cells appeared at the boundary between the epiphysis and the bone marrow. The distribution of hematopoietic cells around the blood vessels was limited to a small number of vessels in the bone marrow. Abundant adipose tissue was observed in the bone marrow cavity from the tadpole stage to the mature frog stage. Hematopoietic cells showed preferential distribution in a belt-like fashion on the surface of newly-formed bones in a bone regeneration model in the diaphysis of X. laevis. These results indicate that the distribution of hematopoietic cells in bone marrow in X. laevis differs from that in mammals, and that the bone marrow of X. laevis constitutes a useful model for exploring the mechanism underlying the phylogenetic differentiation of bone marrow hematopoiesis.","PeriodicalId":45490,"journal":{"name":"Bulletin of Tokyo Dental College","volume":"62 3","pages":"171-180"},"PeriodicalIF":0.5,"publicationDate":"2021-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39311574","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}

引用次数: 1

Effect of Lip-seal Resistance Training on Lip-seal Strength in Young Adults. 封唇阻力训练对青少年封唇力量的影响。

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Bulletin of Tokyo Dental College Pub Date : 2021-09-08 Epub Date: 2021-08-15 DOI: 10.2209/tdcpublication.2020-0058

Masahiro Ryu, Takeshi Oki, Midori Ohta, Kaoru Sakurai, Takayuki Ueda

{"title":"Effect of Lip-seal Resistance Training on Lip-seal Strength in Young Adults.","authors":"Masahiro Ryu, Takeshi Oki, Midori Ohta, Kaoru Sakurai, Takayuki Ueda","doi":"10.2209/tdcpublication.2020-0058","DOIUrl":"https://doi.org/10.2209/tdcpublication.2020-0058","url":null,"abstract":"Lip-seal strength is important for articulating bilabials, capturing food during eating, maintaining fluid within the oral cavity before swallowing, and achieving swallowing pressure. The objective of this study was to investigate the effect of lip-seal resistance training on lip-seal strength in young adults. The participants comprised 15 young healthy adults aged 26-34 years, all with complete dentition. Each was required to perform lip-seal resistance training 5 weekdays a week for 4 weeks with a commercially available instrument for that purpose. The instrument was placed on the midline, left corner, and right corner of the mouth, and pulled forward, leftward, and rightward, respectively. The participants were required to pull the training instrument forcefully while resisting by closing the lips together as strongly as possible until the instrument exited the lips. Lip-seal strength was measured at before and after training using a measurement device. Change in lip-seal strength between before and after training was analyzed using the Wilcoxon signed rank test. The mean lip-seal strength was 8.9±1.5 N before training and 10.4±1.8 N after. A significant difference was observed in lip-seal strength between before and after training (p=0.003), and the mean increase during the training period was 18.1±17.6%. The results showed that lip-seal resistance training for 4 weeks increased lip-seal strength in young adults. These findings suggest that training that involves pulling not only in a forward direction, but also in bilateral directions strongly stimulates the orbicularis oris muscle, resulting in an increase in lip-seal strength.","PeriodicalId":45490,"journal":{"name":"Bulletin of Tokyo Dental College","volume":"62 3","pages":"163-170"},"PeriodicalIF":0.5,"publicationDate":"2021-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39311575","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}

引用次数: 3

Three-Dimensional Analysis of Soft and Hard Tissue Changes following Orthognathic Surgery. 正颌手术后软硬组织变化的三维分析。

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Bulletin of Tokyo Dental College Pub Date : 2021-09-08 Epub Date: 2021-08-15 DOI: 10.2209/tdcpublication.2020-0021

Yoshiko Onaga, Takashi Kamio, Takashi Takaki, Takahiko Shibahara

{"title":"Three-Dimensional Analysis of Soft and Hard Tissue Changes following Orthognathic Surgery.","authors":"Yoshiko Onaga, Takashi Kamio, Takashi Takaki, Takahiko Shibahara","doi":"10.2209/tdcpublication.2020-0021","DOIUrl":"https://doi.org/10.2209/tdcpublication.2020-0021","url":null,"abstract":"Change in soft tissue in relation to that in hard tissue following orthognathic surgery was evaluated. Twenty-five patients were enrolled in the study. The diagnosis in all was jaw deformity (maxillary retrusion and mandibular protrusion) and all underwent a Le Fort I osteotomy and bilateral sagittal splitting ramus osteotomy. Three-dimensional (3D) computer-aided design (CAD) models (polygon models) of the hard and soft tissue of the maxilla and mandible were constructed and superimposed. Reference points were established on the pre- and postoperative hard and soft tissues. Specific elements of each reference point were divided into X, Y, and Z components, respectively, and the distances in each direction and 3D distance (normal distance) measured. The Wilcoxon signed-rank test was used to determine differences in the mean values for the distance moved of each element as the error between pre- and postoperatively. The results revealed statistically significant differences in the Y-direction in the maxilla and the X- and Z-directions in the mandible. A significant difference was also observed in the 3D distances of the maxilla and mandible. Little evidence was found of linearity between the amount of hard and soft tissue movement in the X- and Z-directions in the maxilla. This means that 3D movement in the maxilla was masked more by changes in the morphology of the soft tissue than in the mandible, making it less evident. The results of this study suggest that the 3D analysis method used enables changes in hard and soft tissues to be understood qualitatively, and that it can be used in diagnosis and treatment in orthognathic surgery. It may also be useful in simulation of morphological change in soft tissue.","PeriodicalId":45490,"journal":{"name":"Bulletin of Tokyo Dental College","volume":"62 3","pages":"151-161"},"PeriodicalIF":0.5,"publicationDate":"2021-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39311621","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}

引用次数: 1

A Case of Orthodontic Treatment for Generalized Aggressive Periodontitis. 正畸治疗广泛性侵袭性牙周炎1例。

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Bulletin of Tokyo Dental College Pub Date : 2021-09-08 Epub Date: 2021-08-15 DOI: 10.2209/tdcpublication.2020-0050

Taiki Morikawa, Takenobu Ishii, Hiroaki Goto, Etsuko Motegi, Yasushi Nishii

{"title":"A Case of Orthodontic Treatment for Generalized Aggressive Periodontitis.","authors":"Taiki Morikawa, Takenobu Ishii, Hiroaki Goto, Etsuko Motegi, Yasushi Nishii","doi":"10.2209/tdcpublication.2020-0050","DOIUrl":"https://doi.org/10.2209/tdcpublication.2020-0050","url":null,"abstract":"Aggressive periodontitis mostly affects young people, causing rapid destruction of periodontal tissue and loss of supporting alveolar bone. The destruction of periodontal tissue induces pathological tooth movement, resulting in various types of malocclusion such as crowding or spacing in the dentition. This report describes orthodontic treatment for malocclusion due to generalized aggressive periodontitis. The patient was a 31-year-old woman who presented with the chief complaint of displacement in the anterior teeth. An oral examination revealed pathological tooth mobility throughout the entire oral cavity due to severe loss of periodontal support. Many gaps in the displaced maxillary anterior teeth and crowding in the mandibular anterior teeth were also observed. The goal of subsequent treatment was to achieve ideal overjet and overbite by aligning the teeth and closing the spaces via non-extraction orthodontic treatment with stripping. The periodontal disease was managed by a periodontist who provided guidance on oral hygiene and periodontal disease control throughout the course of orthodontic treatment. Appropriate occlusion and a good oral environment were achieved. The condition of the periodontal tissue stabilized during and after orthodontic treatment, and favourable occlusal stability was observed at the 2-year follow-up examination.","PeriodicalId":45490,"journal":{"name":"Bulletin of Tokyo Dental College","volume":"62 3","pages":"181-192"},"PeriodicalIF":0.5,"publicationDate":"2021-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39311572","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}

引用次数: 3

Implant Body Displacement into Medullary Cavity of Mandible: A Case Report. 下颌骨髓腔内种植体移位1例。

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Bulletin of Tokyo Dental College Pub Date : 2021-09-08 Epub Date: 2021-08-15 DOI: 10.2209/tdcpublication.2021-0001

Yoshitaka Furuya, Takafumi Kobayashi, Kei Sakamoto, Taichi Ito, Masaro Matsuura, Yasutomo Yajima

{"title":"Implant Body Displacement into Medullary Cavity of Mandible: A Case Report.","authors":"Yoshitaka Furuya, Takafumi Kobayashi, Kei Sakamoto, Taichi Ito, Masaro Matsuura, Yasutomo Yajima","doi":"10.2209/tdcpublication.2021-0001","DOIUrl":"https://doi.org/10.2209/tdcpublication.2021-0001","url":null,"abstract":"One serious complication in implant surgery is displacement of the implant body into the surrounding tissue. This occurs only rarely in the mandible, however. This report describes a case of an implant body displacing into the medullary cavity of the mandible and discusses this in reference to the literature. The patient was a 72-year-old woman who was referred to our department at Tokyo Dental College Chiba Hospital (now Chiba Dental Center) by her regular dentist after an implant inserted in the left mandible in 2010 showed loosening in October 2016. Panoramic X-rays obtained at the initial examination revealed that 2 implants had been inserted into the left mandible, one on top of the other. Removal of both was recommended to prevent infection at the implant site and any potential effects on the alveolar nerve. In the absence of subjective symptoms other than implant loosening, however, the patient did not consent to this proposal. Therefore, only the broken abutment was removed. The patient was instructed to contact us immediately should infection or any other symptoms appear once the mucosa had healed, and the dental clinic that had referred her to us was requested to make her a set of dentures. To our knowledge, only 11 reports have been published to date describing displacement of an implant body into the mandible, and these address a total of just 20 cases. The possibility that an implant body in the mandible may become displaced must be kept in mind during treatment.","PeriodicalId":45490,"journal":{"name":"Bulletin of Tokyo Dental College","volume":"62 3","pages":"193-200"},"PeriodicalIF":0.5,"publicationDate":"2021-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39311576","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}

引用次数: 0

Surgical Periodontal Therapy with Recombinant Human Fibroblast Growth Factor-2 in Treatment of Chronic Periodontitis: A Case Report with 2-year Follow-up. 重组人成纤维细胞生长因子-2牙周外科治疗治疗慢性牙周炎:1例2年随访报告。

IF 0.5

Bulletin of Tokyo Dental College Pub Date : 2021-06-04 Epub Date: 2021-05-14 DOI: 10.2209/tdcpublication.2020-0045

Daisuke Matsugami, Hideto Aoki, Atsushi Saito

{"title":"Surgical Periodontal Therapy with Recombinant Human Fibroblast Growth Factor-2 in Treatment of Chronic Periodontitis: A Case Report with 2-year Follow-up.","authors":"Daisuke Matsugami, Hideto Aoki, Atsushi Saito","doi":"10.2209/tdcpublication.2020-0045","DOIUrl":"https://doi.org/10.2209/tdcpublication.2020-0045","url":null,"abstract":"We report a case of generalized chronic periodontitis requiring periodontal regenerative therapy. The patient was a 53-year-old woman who presented with the chief complaint of gingival swelling. An initial examination revealed 31.5% of sites with a probing depth of ≥4 mm and 46.3% with bleeding on probing. Radiographic examination showed vertical bone resorption in tooth #33. Horizontal adsorption was also observed in other areas. Based on a clinical diagnosis of severe generalized chronic periodontitis, initial periodontal therapy consisting of plaque control, scaling and root planing, occlusal adjustment, caries treatment, and splint placement was performed. After re-evaluation, surgical periodontal treatment was performed at selected sites. Periodontal regeneration therapy with recombinant human fibroblast growth factor (rhFGF)-2 was performed at #33. Two other sites (#14, 15), which had residual periodontal pockets, were treated by open-flap debridement. After re-evaluation, the patient was placed on a maintenance program. Periodontal regenerative therapy with rhFGF-2 resulted in an improvement in angular bone resorption, which has been properly maintained for 2 years. Continued care is needed to maintain stable periodontal conditions.","PeriodicalId":45490,"journal":{"name":"Bulletin of Tokyo Dental College","volume":"62 2","pages":"127-134"},"PeriodicalIF":0.5,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38987437","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}

引用次数: 0

Arteriovenous Anastomosis in Human Hand Digital Skin. 人手指皮肤动静脉吻合。

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Bulletin of Tokyo Dental College Pub Date : 2021-06-04 Epub Date: 2021-05-14 DOI: 10.2209/tdcpublication.2020-0036

Takanori Ishibashi, Masahito Yamamoto, Ichiro Morimoto, Michitake Ishii, Hsiu-Kuo Chen, Gen Murakami, Shinichi Abe

{"title":"Arteriovenous Anastomosis in Human Hand Digital Skin.","authors":"Takanori Ishibashi, Masahito Yamamoto, Ichiro Morimoto, Michitake Ishii, Hsiu-Kuo Chen, Gen Murakami, Shinichi Abe","doi":"10.2209/tdcpublication.2020-0036","DOIUrl":"https://doi.org/10.2209/tdcpublication.2020-0036","url":null,"abstract":"While a digital arteriovenous anastomosis (Hoyer-Grosser's organ, Masson's glomus) is a well-known structure, photographic evidence of communication between arterial and venous lumens might not be demonstrated in routine histological or immunohistochemical analysis. Abundant clusters of so-called glomera were found in semi-serial sections of the distal aspect of 14 fingers obtained from 7 donated elderly cadavers. Two to six round or oval clusters were observed in each longitudinal section (over 0.3-0.6 mm in maximum diameter) in subcutaneous tissue 0.5-1.5 mm below the basal layer of the skin, whereas none were often observed in transverse sections. Lumen-to-lumen communication between arteriole and venule at 8 sites in 2 cadavers was identified in these clusters of glomera. The opening in the arteriole was large (50 μm in diameter) at 3 sites in specimens from an 80-year-old man, whereas it was small (10-30 μm) at 5 sites in those from a 91-year-old man. The arterial aspect was tightly surrounded by abundant nerve fibers expressing tyrosine hydroxylase immunoreactivity, whereas the venous part was not. No or little expression of S100 protein immunoreactivity suggested that these nerve fibers were unmyelinated. The morphology at the lumen-to-lumen communication was simple - possibly an end-to-end anastomosis - rather than a sinuous curve of arteriole opening on to a short funnel-shaped venule as seen in the standard textbooks.","PeriodicalId":45490,"journal":{"name":"Bulletin of Tokyo Dental College","volume":"62 2","pages":"63-70"},"PeriodicalIF":0.5,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38998062","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}

引用次数: 0

Patient with Poor Esthetic Anterior Tooth Position Treated with Lithium Disilicate Mesial Cantilever Single-retainer Fixed Partial Denture: A Case Report. 二硅酸锂近端悬臂单固位固定义齿治疗前牙美观不良1例。

IF 0.5

Bulletin of Tokyo Dental College Pub Date : 2021-06-04 Epub Date: 2021-05-14 DOI: 10.2209/tdcpublication.2020-0038

Syuntaro Nomoto, Akina Sugiuchi, Tomohiro Asai, Toru Sato, Hideshi Sekine

{"title":"Patient with Poor Esthetic Anterior Tooth Position Treated with Lithium Disilicate Mesial Cantilever Single-retainer Fixed Partial Denture: A Case Report.","authors":"Syuntaro Nomoto, Akina Sugiuchi, Tomohiro Asai, Toru Sato, Hideshi Sekine","doi":"10.2209/tdcpublication.2020-0038","DOIUrl":"https://doi.org/10.2209/tdcpublication.2020-0038","url":null,"abstract":"We report a case of fixed prosthetic treatment for poor esthetics due to the position of the maxillary left lateral incisor in a 43-year-old woman. Initial examination revealed no carious lesions, but the tooth axis of the maxillary right canine showed mesial inclination of approximately 15°. Orthodontic treatment was first proposed but was declined by the patient as they did not wish to undergo a prolonged period of therapy. Therefore, recovery by extraction of the maxillary right lateral incisor and prosthetic treatment was proposed as an alternative. The method to be used for application of a 3-unit fixed partial denture and implant treatment was explained to the patient. She refused to give consent to this plan as well, however, due to concerns regarding the need to cut a lot from a non-problematic tooth and the length of time such treatment would require. Therefore, the problem was finally treated by application of a cantilever single-retainer fixed partial denture while giving sufficient consideration to extraction and occlusal contact. Lithium disilicate was used for the material of the prothesis. At 1 year after completion of treatment, no problem was observed with either the prosthetic appliance or the abutment teeth.","PeriodicalId":45490,"journal":{"name":"Bulletin of Tokyo Dental College","volume":"62 2","pages":"119-125"},"PeriodicalIF":0.5,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38998063","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}

引用次数: 1

Caries and Its Association with Infant Feeding and Oral Health-related Behavior in 18-month and 3-year-old Japanese Children. 日本18个月和3岁儿童龋齿及其与婴儿喂养和口腔健康行为的关系

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Bulletin of Tokyo Dental College Pub Date : 2021-06-04 Epub Date: 2021-05-14 DOI: 10.2209/tdcpublication.2020-0033

Ayako Tashiro, Takuro Yonezu, Kaido Kumazawa, Atsuo Sakurai, Seikou Shintani

{"title":"Caries and Its Association with Infant Feeding and Oral Health-related Behavior in 18-month and 3-year-old Japanese Children.","authors":"Ayako Tashiro, Takuro Yonezu, Kaido Kumazawa, Atsuo Sakurai, Seikou Shintani","doi":"10.2209/tdcpublication.2020-0033","DOIUrl":"https://doi.org/10.2209/tdcpublication.2020-0033","url":null,"abstract":"The primary aim of this study was to determine the prevalence of dental caries and its association with infant feeding and oral health-related behavior in Japanese children between the ages of 18 months and 3 years. A total of 387 infants were initially examined at the age of 18 months (or 19 months in some cases) and then again at 3 years (or at 3 years 1 month in some cases). The primary objective was to identify factors contributing to the prevalence of caries in children aged 18 months. The secondary objective was to follow up children with no caries at the age of 18 months to seek potential correlations between background factors and the increment of caries by the age of 3 years. In an adjusted multivariate logistic regression model, children who continued breastfeeding were approximately 7 times more likely to have dental caries at 18 months of age than those who did not. Infants brought in for an oral examination and consultation at around 12 months of age were less likely to develop dental caries at 18 months of age than those who were not. Multivariate logistic regression analysis revealed that infants who did not receive a dental check-up at 12 months of age showed a significantly higher incidence of dental caries at 3 years of age. The present results suggest that prolonged breastfeeding is a risk factor for early childhood caries at 18 months of age, and that infants in whom a regular oral care program is implemented from the age of 12 months are less likely to develop early childhood caries at 18 months or 3 years.","PeriodicalId":45490,"journal":{"name":"Bulletin of Tokyo Dental College","volume":"62 2","pages":"71-87"},"PeriodicalIF":0.5,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38998060","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}

引用次数: 1

Comparative Study of Morphology and Distribution of Valves in Human Retromandibular Vein. 人下颌后静脉瓣膜形态及分布的比较研究。

IF 0.5

Bulletin of Tokyo Dental College Pub Date : 2021-06-04 Epub Date: 2021-05-14 DOI: 10.2209/tdcpublication.2020-0046

Norio Kasahara, Satoru Matsunaga, Masahito Yamamoto, Sumiharu Morita, Kento Odaka, Shinichi Abe, Hitoshi Yamamoto

{"title":"Comparative Study of Morphology and Distribution of Valves in Human Retromandibular Vein.","authors":"Norio Kasahara, Satoru Matsunaga, Masahito Yamamoto, Sumiharu Morita, Kento Odaka, Shinichi Abe, Hitoshi Yamamoto","doi":"10.2209/tdcpublication.2020-0046","DOIUrl":"https://doi.org/10.2209/tdcpublication.2020-0046","url":null,"abstract":"The objective of this study was to analyze the distribution and morphology of the valves in the human retromandibular vein. The retromandibular, internal thoracic, azygos, femoral, and brachial veins were harvested from 46 cadavers donated to the Department of Anatomy at Tokyo Dental College for dissection. The frequency of the valves in each vein, the length of the cusps, and the thickness of the vein itself were measured. Valves were present at high frequency (92.1%) in the veins of the limbs and had cusps at least twice as long as the internal diameter of the vein. Veins in the trunk contained a lower frequency of valves, with cusps that tended to be shorter (1.60±0.77) than those of the venous valves in the limbs (2.12±0.60). The valves of the retromandibular vein tended to resemble venous valves in the trunk in terms of both frequency and morphology. The main function of venous valves in the limbs is to prevent retrograde flow. Conversely, valves in the veins of the trunk and retromandibular vein play a role in retaining blood in the veins, and their relationship to other veins means that they can cause major hemorrhage.","PeriodicalId":45490,"journal":{"name":"Bulletin of Tokyo Dental College","volume":"62 2","pages":"99-106"},"PeriodicalIF":0.5,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38987438","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}

引用次数: 1