Bulletin of Tokyo Dental College最新文献_第7页

Periodontal Regenerative Therapy with Recombinant Human Fibroblast Growth Factor-2 and Deproteinized Bovine Bone Mineral in Patient with Chronic Periodontitis: An 18-month Follow-up Report. 重组人成纤维细胞生长因子-2和脱蛋白牛骨矿物质对慢性牙周炎患者牙周再生治疗:18个月的随访报告。

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Bulletin of Tokyo Dental College Pub Date : 2021-06-04 Epub Date: 2021-05-14 DOI: 10.2209/tdcpublication.2020-0034

Takahiro Bizenjima, Daisuke Irokawa, Kobun Tanaka, Atsushi Saito, Sachiyo Tomita

{"title":"Periodontal Regenerative Therapy with Recombinant Human Fibroblast Growth Factor-2 and Deproteinized Bovine Bone Mineral in Patient with Chronic Periodontitis: An 18-month Follow-up Report.","authors":"Takahiro Bizenjima, Daisuke Irokawa, Kobun Tanaka, Atsushi Saito, Sachiyo Tomita","doi":"10.2209/tdcpublication.2020-0034","DOIUrl":"https://doi.org/10.2209/tdcpublication.2020-0034","url":null,"abstract":"This report describes a case of generalized chronic periodontitis requiring periodontal regenerative therapy. The patient was a 62-year-old man who presented with the chief complaint of gingival swelling in the molar region. An initial examination revealed that 31.6% of sites had a probing depth of ≥4 mm and 18.5% bleeding on probing. Radiographic examination revealed vertical bone resorption in #14, 25, 26, 27, 32, 37, 45, and 47, and horizontal resorption in other regions. Based on a clinical diagnosis of moderate chronic periodontitis, initial periodontal therapy consisting of plaque control and scaling and root planing was performed. Occlusal adjustment of premature contact sites was performed after inflammation was suppressed. Surgical periodontal therapy was subsequently performed at selected sites. Periodontal regenerative therapy using recombinant human fibroblast growth factor (rhFGF)-2 was performed on #14, 25, 26, 32, and 37. Combination therapy with rhFGF-2 and deproteinized bovine bone mineral (DBBM) was performed on #45 and 47. Other sites with residual periodontal pockets were treated by open flap debridement, and #27 was extracted due to a bone defect exceeding the root apex. Progress was then reevaluated and the patient placed on supportive periodontal therapy. Periodontal regenerative therapy using rhFGF-2 in combination with DBBM resulted in an improvement in clinical parameters and vertical bone resorption. This improvement has been adequately maintained over an 18-month period. The periodontal treatment provided resulted in a marked improvement in the patient's oral health-related quality of life.","PeriodicalId":45490,"journal":{"name":"Bulletin of Tokyo Dental College","volume":"62 2","pages":"107-117"},"PeriodicalIF":0.5,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38998061","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

Role of Hyalin-like Protein in Gliding and Biofilm Formation by Capnocytophaga Ochracea. 透明蛋白样蛋白在碳吞噬菌滑翔和生物膜形成中的作用。

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Bulletin of Tokyo Dental College Pub Date : 2021-06-04 Epub Date: 2021-05-14 DOI: 10.2209/tdcpublication.2020-0051

Kazuko Okamoto-Shibayama, Takenobu Warita, Eitoyo Kokubu, Daichi Kita, Yuichiro Kikuchi, Kazuyuki Ishihara

{"title":"Role of Hyalin-like Protein in Gliding and Biofilm Formation by Capnocytophaga Ochracea.","authors":"Kazuko Okamoto-Shibayama, Takenobu Warita, Eitoyo Kokubu, Daichi Kita, Yuichiro Kikuchi, Kazuyuki Ishihara","doi":"10.2209/tdcpublication.2020-0051","DOIUrl":"https://doi.org/10.2209/tdcpublication.2020-0051","url":null,"abstract":"Capnocytophaga ochracea possesses a type-IX secretion system that exports proteins which have a gliding motility-associated C-terminal (CTD) domain. This system is found in several species of the Bacteroidetes phylum. Hyalin, a large protein encoded by Coch_0033 in C. ochracea ATCC 27872, has a CTD domain and is posited to be involved in quorum sensing according to the database of the Kyoto Encyclopedia of Genes and Genomes. This suggests that it plays a role in biofilm formation via interbacterial communication. The aim of this study was to investigate the potential role of the hyalin-like protein coded by the Coch_0033 gene in gliding and biofilm formation of C. ochracea. A hyalin-like protein-deficient mutant strain of C. ochracea, designated mutant WR-1, was constructed through insertion of the ermF-ermAM cassette into the target gene. The spreading feature at the edge of the colony was lost in the mutant strain. Crystal violet and confocal laser scanning microscopy revealed no difference between the quantity of biofilm organized by the mutant and that organized by the wild-type strain. These data suggest that the hyalin-like protein encoded by the Coch_0033 gene is indeed involved in C. ochracea gliding activity.","PeriodicalId":45490,"journal":{"name":"Bulletin of Tokyo Dental College","volume":"62 2","pages":"89-98"},"PeriodicalIF":0.5,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38987439","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

Evaluation of Public Health Expenditure by Number of Teeth among Outpatients with Diabetes Mellitus. 门诊糖尿病患者牙数对公共卫生支出的评价

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Bulletin of Tokyo Dental College Pub Date : 2021-03-13 Epub Date: 2021-02-15 DOI: 10.2209/tdcpublication.2020-0035

Seitaro Suzuki, Tatsuya Noda, Yuichi Nishioka, Tomoya Myojin, Shinichiro Kubo, Tomoaki Imamura, Hideyuki Kamijo, Naoki Sugihara

{"title":"Evaluation of Public Health Expenditure by Number of Teeth among Outpatients with Diabetes Mellitus.","authors":"Seitaro Suzuki, Tatsuya Noda, Yuichi Nishioka, Tomoya Myojin, Shinichiro Kubo, Tomoaki Imamura, Hideyuki Kamijo, Naoki Sugihara","doi":"10.2209/tdcpublication.2020-0035","DOIUrl":"https://doi.org/10.2209/tdcpublication.2020-0035","url":null,"abstract":"The relationship between public health expenditure and number of teeth was investigated in patients with diabetes mellitus using data obtained from the Japanese National Database of Health Insurance Claims and Specific Health Checkups. Data on medical, dental, and pharmacy claims generated between April 2015 and March 2016 were analyzed in patients with diabetes mellitus aged 50-74 years who used outpatient services during this period. Patients initiating medical and pharmacy claims related to diabetes mellitus were defined as having diabetes mellitus. Number of teeth was defined as number of teeth in conjunction with periodontitis due to the nature of the data source. Descriptive statistics were used to investigate the association between number of teeth and public health expenditure. Data on a total of 1,017,758 patients with diabetes mellitus were analyzed. Patients with the fewest teeth incurred higher medical expenses. The largest mean difference in medical expenditure was observed between patients with 5-9 teeth and those with over 28 teeth. The results of this study suggest that public health expenditure on patients with diabetes mellitus differs based on number of teeth.","PeriodicalId":45490,"journal":{"name":"Bulletin of Tokyo Dental College","volume":"62 1","pages":"55-60"},"PeriodicalIF":0.5,"publicationDate":"2021-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25370955","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

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Bulletin of Tokyo Dental College Pub Date : 2021-03-13 Epub Date: 2021-02-15 DOI: 10.2209/tdcpublication.2020-0002

Masayasu Yoshida, Akira Baba, Kazuhiko Hashimoto, Yuriko Nakamura, Yasutaka Itou, Yoshifumi Yoshida, Kazumichi Sato, Takeshi Nomura

引用次数: 0

Influence of Tooth Mold Materials in Composite Resin CAD/CAM Crown Destructive Test. 复合树脂CAD/CAM齿冠破坏试验中牙模材料的影响

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Bulletin of Tokyo Dental College Pub Date : 2021-03-13 Epub Date: 2021-02-15 DOI: 10.2209/tdcpublication.2020-0028

Syuntaro Nomoto, Tomotoshi Masuda, Toru Sato, Mariko Yumoto, Gen Kuroishi, Yosuke Maeda, Mizuho Hirano, Hideshi Sekine

{"title":"Influence of Tooth Mold Materials in Composite Resin CAD/CAM Crown Destructive Test.","authors":"Syuntaro Nomoto, Tomotoshi Masuda, Toru Sato, Mariko Yumoto, Gen Kuroishi, Yosuke Maeda, Mizuho Hirano, Hideshi Sekine","doi":"10.2209/tdcpublication.2020-0028","DOIUrl":"https://doi.org/10.2209/tdcpublication.2020-0028","url":null,"abstract":"A range of experimental designs have been used in destructive testing of composite resin CAD/CAM crowns. Various materials have been adopted for the abutment in such tests, including human or bovine dentin, stainless steel, PMMA, and composite resin, the selection of which is made in accordance with study objective or preference of the researcher. The purpose of this study was to determine how the material selected for the abutment material affected fracture load and maximum displacement. Destructive tests were conducted on composite resin crowns of the same design. Three types of material were used for the abutments together with 2 types of adhesive material. Images of each sample were acquired before destruction using a microfocus X-ray CT scanner to confirm the feasibility of a non-destructive test.The load required to fracture the composite CAD/CAM resin crowns depended on the abutment material used, with a decrease being observed in the order of composite resin, stainless steel, and PMMA. Maximum displacement decreased in the order of PMMA, composite resin, and stainless steel. Differences in the material used for setting (adhesive resin or polycarboxylate cement) showed no effect on fracture load. These results indicate that the load required to achieve destruction of resin CAD/CAM crowns varies according to the abutment material used.","PeriodicalId":45490,"journal":{"name":"Bulletin of Tokyo Dental College","volume":"62 1","pages":"15-26"},"PeriodicalIF":0.5,"publicationDate":"2021-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25370953","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

Inhibitory Effect of Resveratrol on Candida albicans Biofilm Formation. 白藜芦醇对白色念珠菌生物膜形成的抑制作用。

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Bulletin of Tokyo Dental College Pub Date : 2021-03-13 Epub Date: 2021-02-15 DOI: 10.2209/tdcpublication.2020-0023

Kazuko Okamoto-Shibayama, Ayumi Yoshida, Kazuyuki Ishihara

{"title":"Inhibitory Effect of Resveratrol on Candida albicans Biofilm Formation.","authors":"Kazuko Okamoto-Shibayama, Ayumi Yoshida, Kazuyuki Ishihara","doi":"10.2209/tdcpublication.2020-0023","DOIUrl":"https://doi.org/10.2209/tdcpublication.2020-0023","url":null,"abstract":"Candida albicans is the primary candidiasis-causing fungal pathogen in humans, and one of its most important virulence factors is the ability to form biofilms. Moreover, these biofilms are often resistant to antifungal agents, so there is a need to develop alternative elimination strategies and therapeutic agents for such infections. The antifungal activity of resveratrol, a phytoalexin polyphenolic compound, impairs the morphological transition of C. albicans under various hypha-inducing conditions and inhibits growth of the yeast-form and mycelia. The purpose of this study was to investigate the effect of resveratrol against C. albicans biofilm formation. The developmental, sustained, and mature stages of biofilm formation were affected or inhibited by resveratrol. Exposure to resveratrol at the developmental stage inhibited growth of C. albicans in a dose-dependent manner. A >30% reduction was observed in sustained biofilm growth in the presence of 200 μg/ml resveratrol in comparison with in its absence. In terms of disruption of matured biofilm, 6.25-100 μg/ml resveratrol significantly reduced cell viability of C. albicans compared with in a control sample (p<0.05). The present results indicate that resveratrol has the potential to serve as an anti-Candida treatment and preventive tool which functions by inhibiting existing or under-forming C. albicans biofilms.","PeriodicalId":45490,"journal":{"name":"Bulletin of Tokyo Dental College","volume":"62 1","pages":"1-6"},"PeriodicalIF":0.5,"publicationDate":"2021-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25370952","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: 6

Ameloblastic Fibroma in Mandibular Anterior Tooth Region: A Case Report. 下颌前牙区成釉纤维瘤1例。

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Bulletin of Tokyo Dental College Pub Date : 2021-03-13 Epub Date: 2021-02-15 DOI: 10.2209/tdcpublication.2020-0031

Takeshi Onda, Azusa Yamazaki, Kamichika Hayashi, Takahiro Iwasaki, Kazuhiko Hashimoto, Masayuki Takano

{"title":"Ameloblastic Fibroma in Mandibular Anterior Tooth Region: A Case Report.","authors":"Takeshi Onda, Azusa Yamazaki, Kamichika Hayashi, Takahiro Iwasaki, Kazuhiko Hashimoto, Masayuki Takano","doi":"10.2209/tdcpublication.2020-0031","DOIUrl":"https://doi.org/10.2209/tdcpublication.2020-0031","url":null,"abstract":"An ameloblastic fibroma (AF) is a proliferative mixed tumor which includes components of both odontogenic epithelium and mesenchymal tissue. It is a relatively rare neoplasm, accounting for approximately only 1.5－4.5% of odontogenic tumors. This case report describes an AF that occurred in the mandibular anterior tooth region in a 9-year-old girl who presented with the chief complaint of swelling in the left mandibular anterior tooth region. Intraoral examination revealed a swelling along the labial gingiva, extending from the left mandibular lateral incisor region to the left mandibular canine. Upon palpation, the swelling appeared to comprise a hard tissue. Computed tomography revealed a supernumerary impacted tooth; soft tissue density in the bone surrounding the region extending from the left mandibular lateral incisor to the left mandibular canine; labial bone expansion; and thinning of the labial cortical bone. A biopsy was performed under local anesthesia and the lesion subsequently diagnosed as an AF. Tumor resection and extraction of the supernumerary impacted tooth were carried out under general anesthesia. At 2 years postoperatively the prognosis is good. Although relapse with an AF is rarer than that with an ameloblastoma, strict follow-up is required, as malignant transformation to an ameloblastic fibrosarcoma has been reported in relapsed cases.","PeriodicalId":45490,"journal":{"name":"Bulletin of Tokyo Dental College","volume":"62 1","pages":"49-54"},"PeriodicalIF":0.5,"publicationDate":"2021-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25370954","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: 2

Effects of Chewing Gum Base on Oral Hygiene and Mental Health: A Pilot Study. 口香糖碱对口腔卫生和心理健康的影响:一项初步研究。

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Bulletin of Tokyo Dental College Pub Date : 2021-03-13 Epub Date: 2021-02-15 DOI: 10.2209/tdcpublication.2020-0009

Akane Takenouchi, Yoji Saeki, Etsuyo Otani, Minji Kim, Asami Fushimi, Yukiko Satoh, Yumiko Kakegawa, Hiroe Arai, Nanako Taguchi, Takashi Matsukubo

{"title":"Effects of Chewing Gum Base on Oral Hygiene and Mental Health: A Pilot Study.","authors":"Akane Takenouchi, Yoji Saeki, Etsuyo Otani, Minji Kim, Asami Fushimi, Yukiko Satoh, Yumiko Kakegawa, Hiroe Arai, Nanako Taguchi, Takashi Matsukubo","doi":"10.2209/tdcpublication.2020-0009","DOIUrl":"https://doi.org/10.2209/tdcpublication.2020-0009","url":null,"abstract":"The purpose of the present study was to clarify the long-term effects of frequent chewing of unflavored and odorless gum (hereafter, gum base) on oral hygiene and mental health. This single-arm study, which started with a 4-week control and ended with a 4-week intervention period, was conducted in two phases: one in 2017 and one in 2018. The participants comprised 36 dental hygiene students (17 in 2017, 19 in 2018). During the intervention period, all participants were required to chew a piece of gum base 7 times a day for 10 min each time. The unstimulated salivary flow rate and masticatory efficiency were measured and chewing number counted. Two questionnaires －the Profile of Mood States, second edition (POMS2) and the 30-item General Health Questionnaire (GHQ-30)－ were administered to assess mental health. In both phases, the unstimulated salivary flow rate showed a significant increase after the intervention period (p<0.05). In 2017, the GHQ-30 scores and masticatory efficiency showed a tendency toward a negative correlation after the intervention period (r=－0.4647, p=0.06). In 2018, a significant negative correlation was observed between chewing number and the POMS2 scores after the intervention period (r=－0.6296, p<0.01). These findings suggest that frequent chewing of gum base increases unstimulated salivary flow rate. However, no significant change was observed in the mental health.","PeriodicalId":45490,"journal":{"name":"Bulletin of Tokyo Dental College","volume":"62 1","pages":"7-14"},"PeriodicalIF":0.5,"publicationDate":"2021-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25367688","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: 2

A Case of Mandibular Prognathism with Generalized Aggressive Periodontitis and Crowding. 下颌前突合并广泛性侵袭性牙周炎及拥挤1例。

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Bulletin of Tokyo Dental College Pub Date : 2021-03-13 Epub Date: 2021-02-15 DOI: 10.2209/tdcpublication.2020-0012

Takenobu Ishii, Hiroaki Goto, Akira Watanabe, Shigeki Yamamoto, Hiroko Onodera, Shuji Yoshida, Yasushi Nishii

{"title":"A Case of Mandibular Prognathism with Generalized Aggressive Periodontitis and Crowding.","authors":"Takenobu Ishii, Hiroaki Goto, Akira Watanabe, Shigeki Yamamoto, Hiroko Onodera, Shuji Yoshida, Yasushi Nishii","doi":"10.2209/tdcpublication.2020-0012","DOIUrl":"https://doi.org/10.2209/tdcpublication.2020-0012","url":null,"abstract":"Aggressive periodontitis during adolescence has a poor prognosis due to rapid alveolar bone resorption. Few studies have investigated long-term follow-up after surgical orthodontic treatment performed in conjunction with that for invasive periodontitis. Here, we report a case of mandibular prognathism accompanied by generalized aggressive periodontitis and crowding. A 31-year-old woman was referred to our department for treatment of masticatory dysfunction due to reverse overjet. The patient exhibited a class III molar relationship, protrusion of the ANB of －6.0°, and severe maxillary crowding. Initial periodontal examination revealed deep periodontal pockets and extensive inflammation. Mandibular prognathism accompanied by generalized aggressive periodontitis and crowding was diagnosed. Therefore, it was necessary to adopt an interdisciplinary approach involving surgical, orthodontic, and periodontal treatment. Prior to commencement of orthodontic treatment, plaque control, scaling, and root planing of all teeth were performed by a periodontist to suppress inflammation and reduce probing depth. During pre-surgical orthodontic treatment, the maxillary first premolars were extracted to reduce crowding of the maxillary incisors. To correct the mandibular prognathism, the mandible was repositioned by sagittal split ramus osteotomy. Proper occlusion of the incisors and maximum intercuspation were achieved by post-surgical orthodontic treatment. After completion of active orthodontic treatment, acceleration of inflammation was observed together with aggravated resorption of the alveolar bone surrounding the molars. However, reduction of probing depth and inflammation were observed after scaling and root planing. The surgical-orthodontic treatment time was 1 year and 11 months, which was followed by a 2-year retention period. There was no tooth loss due to periodontitis, and an overall satisfactory outcome was achieved.","PeriodicalId":45490,"journal":{"name":"Bulletin of Tokyo Dental College","volume":"62 1","pages":"27-39"},"PeriodicalIF":0.5,"publicationDate":"2021-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"25367689","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 Orthodontic Treatment in Case of Severe High Angle Skeletal Class II Malocclusion and Mandibular Retrusion. 严重高角骨ⅱ类错颌后缩的外科正畸治疗。

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Bulletin of Tokyo Dental College Pub Date : 2020-12-16 Epub Date: 2020-11-10 DOI: 10.2209/tdcpublication.2020-0022

Chie Tachiki, Masae Yamamoto, Takashi Takaki, Yasushi Nishii

{"title":"Surgical Orthodontic Treatment in Case of Severe High Angle Skeletal Class II Malocclusion and Mandibular Retrusion.","authors":"Chie Tachiki, Masae Yamamoto, Takashi Takaki, Yasushi Nishii","doi":"10.2209/tdcpublication.2020-0022","DOIUrl":"https://doi.org/10.2209/tdcpublication.2020-0022","url":null,"abstract":"This report describes a patient with severe high angle class II malocclusion and mandibular retrusion in whom surgical orthodontic treatment to prevent an increase in ramus height resulted in a significant improvement in esthetics and long-term stability. The patient was a woman aged 30 years 5 months who presented with the chief complaint of maxillary protrusion. She had a convex facial type, a chin button on lip sealing, and a gummy smile. Cephalometric analysis revealed a normal maxilla anterior-posterior position, but significant mandibular retrusion with pronounced clockwise rotation. The anterior maxillary tooth axis was standard, but labially inclined in the mandible. Based on these findings, the diagnosis was skeletal class II high angle malocclusion and mandibular retrusion. The proposed treatment plan comprised 2-jaw surgery with premolar extraction. Le Fort I osteotomy, in particular, was planned in the maxilla to move the ANS upward by 3.0 mm and the PNS downward by 3.0 mm. Sagittal split ramus osteotomy (SSRO) was planned to adjust the mandible and move the mandible forward by 10.0 mm. To prevent postoperative relapse, the short lingual split method was used in performing the SSRO. The mandible was split to minimize stretching of the median pterygoid muscle. Postoperatively, the ANS, PNS, and pogonion showed movement of 2.0 mm upward, 3.0 mm downward, and 8.0 mm forward, respectively. Additionally, lip closure was now natural, and the gummy smile had markedly improved. At 6 years postoperatively, there has been no change skeletally or dentally. Follow-up is being continued to monitor further progress.","PeriodicalId":45490,"journal":{"name":"Bulletin of Tokyo Dental College","volume":"61 4","pages":"243-253"},"PeriodicalIF":0.5,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38589765","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