{"title":"A case of chronic periodontitis with drug-induced gingival overgrowth that improved with non-surgical periodontal treatment","authors":"R. Tanaka, T. Kaneko","doi":"10.2329/perio.62.96","DOIUrl":"https://doi.org/10.2329/perio.62.96","url":null,"abstract":"","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86482861","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}
关于牙周病病理的思考方式，迄今为止有过数次的paradimshift，现在定义为多因素的慢性炎症性疾病。我们常从“牙周病”这一“结果”来推测“因”，但时间轴长，很难区分“因果关系”和“前后关系”，科学证明也很困难。因此，在进行临床推论时经常存在不确定性。另外，即使是盖然性较高的推论，如果不下功夫进行流行病学评估并加以科学证明，就无法成为现在evidence based medicine(EBM)的知识基础。2017年牙周疾病和牙菌斑周围疾病World Workshop Proceedings中写道:“咬合性创伤不会引起牙菌斑诱导性牙周病或牙菌斑。”的共识报告，但从目前为止的研究论文来看，很难说已经获得了充分的证据。过去曾基于“咬合力vs炎症”的二元论进行过动物实验，但从证据等级的角度来看，动物实验的可信度很低。在本小论中，重新考虑了有关咬合性外伤(结果)和外伤性咬合(原因)的研究和讨论。
{"title":"Reconsideration of occlusal trauma in the pathogenesis of periodontal diseases","authors":"Keiso Takahashi, K. Yamazaki, M. Yamazaki","doi":"10.2329/perio.62.47","DOIUrl":"https://doi.org/10.2329/perio.62.47","url":null,"abstract":"歯周病病態の考え方にはこれまでに数回のパラダイ ムシフトがあり,現在は多因子性で慢性の炎症性疾患 と定義されている。我々は常に「歯周病」という「結 果」から「原因」を推測するが,時間軸が長いと「因 果関係」と「前後関係」を見分けることは難しく科学 的に証明することは困難である。そのため,臨床推論 を行う際には常に不確実性が残る。また,蓋然性の高 い推論であっても疫学的評価を工夫して科学的に証明 しなければ現在の evidence based medicine(EBM)の 知識基盤になり得ない。2017年の歯周疾患とインプラ ント周囲疾患のWorld Workshop Proceedingsには 「咬合性外傷はプラーク誘導性の歯周病あるいはア タッチメントロスを引き起こさない。」というコンセン サスが報告されたが,これまでの研究論文を読む限り, 十分なエビデンスが得られているとは言い難い。かつ て,「咬合力 vs炎症」の二元論に基づいて動物実験が 行われたが,エビデンスのヒエラルキーの観点からは 動物実験の信頼性は低い。本小論では,咬合性外傷(結 果)と外傷性咬合(原因)に関する研究および議論に ついて再考した。","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88551020","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}
Masaya Yoshimine, R. Yamasaki, Kanako Okazaki, Remi Ogiso, H. Kamoi, Eri Asaki
{"title":"Effect on oral hygiene of a tooth brush equipped with a built-in titanium oxide (TiO2) electrode and solar cell","authors":"Masaya Yoshimine, R. Yamasaki, Kanako Okazaki, Remi Ogiso, H. Kamoi, Eri Asaki","doi":"10.2329/perio.62.58","DOIUrl":"https://doi.org/10.2329/perio.62.58","url":null,"abstract":"","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89698699","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":"Assessment of human gingival inflammation based on measurements of tissue oxygen saturation and local blood flow","authors":"Takafumi Suto, M. Ikawa, S. Yamada","doi":"10.2329/perio.62.82","DOIUrl":"https://doi.org/10.2329/perio.62.82","url":null,"abstract":"","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84485499","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}
Masahi Yamaguchi, M. Mizoguchi, Saori Ishiyama, Yuka Shinoda, H. Kato
: We report the case of a patient with periodontitis complicated by occlusal trauma who re-ceived initial therapy using a psychological approach, which was reinforced at every follow-up visit, regenerative therapy with enamel matrix derivative (EMD) and autogenous bone, and supportive periodontal therapy (SPT), and has been followed up for 11 years. The patient, a 55-year-old woman, visited the dental office complaining of inter-dental spaces in the anterior teeth. Examination revealed the following: bleeding on probing (BOP): 97%; probing depth (PD): 7 mm or more in 9 teeth; vertical bone resorption in the maxillary anterior teeth. Tooth mobility was ob-served for many teeth and the patient reported having a habit of clenching her teeth while working. We diagnosed the patient as having periodontitis with inflammation and occlusal trauma. Focusing on removal of the cause for periodontal treatment, we adopted a psychological approach for the initial therapy, a motivational approach, followed by Otaniʼs guidance and cognitive behavioral therapy for bruxism, and counseling about work-related stress reduction. After re-evaluation, periodontal surgery and oral rehabilitation were carried out, and an occlusal splint was provided as a countermeasure for bruxism, and self-implicit therapy under Ikedaʼs guidance as an-other psychological treatment. We have recalled the patient every 3 months after the transition to SPT, the psychological treatment was strengthened at every visit, and 11 years have passed favorably. From these results, introduction of a psychological approach to periodontal treatment seems ef-fective in improving the patientʼs motivation for treatment and enhancing the effects of treatment.
{"title":"A case of generalized periodontitis who was successfully treated using a psychological approach followed up for 11 years","authors":"Masahi Yamaguchi, M. Mizoguchi, Saori Ishiyama, Yuka Shinoda, H. Kato","doi":"10.2329/perio.62.107","DOIUrl":"https://doi.org/10.2329/perio.62.107","url":null,"abstract":": We report the case of a patient with periodontitis complicated by occlusal trauma who re-ceived initial therapy using a psychological approach, which was reinforced at every follow-up visit, regenerative therapy with enamel matrix derivative (EMD) and autogenous bone, and supportive periodontal therapy (SPT), and has been followed up for 11 years. The patient, a 55-year-old woman, visited the dental office complaining of inter-dental spaces in the anterior teeth. Examination revealed the following: bleeding on probing (BOP): 97%; probing depth (PD): 7 mm or more in 9 teeth; vertical bone resorption in the maxillary anterior teeth. Tooth mobility was ob-served for many teeth and the patient reported having a habit of clenching her teeth while working. We diagnosed the patient as having periodontitis with inflammation and occlusal trauma. Focusing on removal of the cause for periodontal treatment, we adopted a psychological approach for the initial therapy, a motivational approach, followed by Otaniʼs guidance and cognitive behavioral therapy for bruxism, and counseling about work-related stress reduction. After re-evaluation, periodontal surgery and oral rehabilitation were carried out, and an occlusal splint was provided as a countermeasure for bruxism, and self-implicit therapy under Ikedaʼs guidance as an-other psychological treatment. We have recalled the patient every 3 months after the transition to SPT, the psychological treatment was strengthened at every visit, and 11 years have passed favorably. From these results, introduction of a psychological approach to periodontal treatment seems ef-fective in improving the patientʼs motivation for treatment and enhancing the effects of treatment.","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84388217","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":"病態から見えてくる歯周病の修飾因子―歯科衛生士として知っておきたい臨床所見―","authors":"","doi":"10.2329/perio.62.121","DOIUrl":"https://doi.org/10.2329/perio.62.121","url":null,"abstract":"","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75773084","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}
Masae Nakazawa, Tatsuo Yamamoto, Emiko Muto, H. Seino, S. Sasaki, Tomoko Kakugawa, Y. Shirai, Y. Mochida, Shinya Fuchida, M. Minabe
{"title":"Association of Glycosylated Hemoglobin A1c with the Masticatory Function and Periodontitis in Type 2 Diabetes Patients Hospitalized for an Education Program: A Cross-sectional Study","authors":"Masae Nakazawa, Tatsuo Yamamoto, Emiko Muto, H. Seino, S. Sasaki, Tomoko Kakugawa, Y. Shirai, Y. Mochida, Shinya Fuchida, M. Minabe","doi":"10.2329/perio.62.74","DOIUrl":"https://doi.org/10.2329/perio.62.74","url":null,"abstract":"","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82561490","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}
Chihiro Kano, H. Kobayashi, K. Nozaki, Yuka Tsumanuma, T. Sudo, Thatawee Khemwong, Ryo Mikami, Y. Izumi
: Periodontal treatment is performed to achieve a biologically acceptable exposed root surface. Root planing removes the part of the root surface that contains inflammation-inducing substances. Previous studies reported that lipopolysaccharide (LPS) existed on superficial exposed root surfaces and deep root planing was not necessary for periodontal treatment. However, recently, it was reported that not only LPS but also various pathogen-associated molecular pattern molecules (PAMPs) and damage-associated molecular pattern molecules (DAMPs) cause biological immune responses. Advanced thera-pies, such as periodontal tissue regeneration, use periodontal ligament stem cells (PDL-MSCs), but the influence of substances on the PDL-MSCs on the root surface is unclear. In this study, we analyzed the permeability of the inflammation-inducing substance on the root surface to determine a suitable root surface for optimal periodontal regeneration. Extracted teeth were planed, and the shaving extracts from root surfaces were used to measure the bacterial genome. The IL-1 β expression in THP-1 cells stimulated by the shavings was measured and the production pathway of IL-1 β was investigated using inhibitors. PDL-MSCs were used to examine cell attachment and proliferation on the planed root surface. By laser microscope, the root planed depth of the periodontitis-affected exposed root surface was 32.2 ±3.86 μ m after the first stroke, 51.9±9.31 μ m after the second, 85.4±10.2 μ m after the third, and 96.2± 4.64 μ m after the fourth stroke. Bacterial genome and IL-1 β mRNA expression were detected from all shaving extracts up to 8 strokes. The 3-stroke planing showed a significantly high number of PDL-MSCs on the planed root surface. PAMPs and DAMPs in the shaving extracts were involved in the IL-1 β production pathway. These results indicated that bacterial penetration was observed up to at least the eighth stroke and 3-stroke root planing was necessary for the adherence of the PDL-MSCs. Our research highlights the need for further studies by setting a standard for the ideal preparation of a root surface to receive periodontal stem cells for regenerative procedures.
{"title":"Effective root planing for biologically acceptable root surfaces: an experimental study","authors":"Chihiro Kano, H. Kobayashi, K. Nozaki, Yuka Tsumanuma, T. Sudo, Thatawee Khemwong, Ryo Mikami, Y. Izumi","doi":"10.2329/perio.62.1","DOIUrl":"https://doi.org/10.2329/perio.62.1","url":null,"abstract":": Periodontal treatment is performed to achieve a biologically acceptable exposed root surface. Root planing removes the part of the root surface that contains inflammation-inducing substances. Previous studies reported that lipopolysaccharide (LPS) existed on superficial exposed root surfaces and deep root planing was not necessary for periodontal treatment. However, recently, it was reported that not only LPS but also various pathogen-associated molecular pattern molecules (PAMPs) and damage-associated molecular pattern molecules (DAMPs) cause biological immune responses. Advanced thera-pies, such as periodontal tissue regeneration, use periodontal ligament stem cells (PDL-MSCs), but the influence of substances on the PDL-MSCs on the root surface is unclear. In this study, we analyzed the permeability of the inflammation-inducing substance on the root surface to determine a suitable root surface for optimal periodontal regeneration. Extracted teeth were planed, and the shaving extracts from root surfaces were used to measure the bacterial genome. The IL-1 β expression in THP-1 cells stimulated by the shavings was measured and the production pathway of IL-1 β was investigated using inhibitors. PDL-MSCs were used to examine cell attachment and proliferation on the planed root surface. By laser microscope, the root planed depth of the periodontitis-affected exposed root surface was 32.2 ±3.86 μ m after the first stroke, 51.9±9.31 μ m after the second, 85.4±10.2 μ m after the third, and 96.2± 4.64 μ m after the fourth stroke. Bacterial genome and IL-1 β mRNA expression were detected from all shaving extracts up to 8 strokes. The 3-stroke planing showed a significantly high number of PDL-MSCs on the planed root surface. PAMPs and DAMPs in the shaving extracts were involved in the IL-1 β production pathway. These results indicated that bacterial penetration was observed up to at least the eighth stroke and 3-stroke root planing was necessary for the adherence of the PDL-MSCs. Our research highlights the need for further studies by setting a standard for the ideal preparation of a root surface to receive periodontal stem cells for regenerative procedures.","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76977252","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}
A. Aoki, Y. Takeuchi, T. Akizuki, K. Mizutani, Sayaka Katagiri, Y. Ikeda, Shogo Maekawa, Kazuki Watanabe, A. Ebihara, M. Hideshima, T. Nikaido, S. Oda, K. Araki, T. Iwata, Y. Izumi
: During the fifth and sixth year of Dental School at Tokyo Medical and Dental University (TMDU), predoctoral dental students participate in comprehensive clinical practice at the Dental Hospital. The student clinical practice experience is organized into three phases. Phase I consists of clinical simulation practice at each of the Dental Hospitalʼs clinics from September to October of year 5 (6 weeks). This occurs just prior to the start of actual clinical practice. Phase II consists of comprehensive clinical practice at the Student Clinic from November of year 5 to October of year 6 (47 weeks). Phase III involves advanced clinical simulation practice or lectures, where students gain advanced exposure to an area of their interest (5 weeks). This starts after the National Exams held in February of year 6. Regarding the clinical practice of periodontal therapy, every student practices periodontal examination, oral hygiene instruction, initial treatment, and assists with surgical treatment. During Phase II, the clinical practice is supervised by Dental Faculty members. A credit system is employed for the evalu-ation with points awarded for successful completion of training in each clinical procedure. The graduating class of 2018 (51 students) had periodontal therapy experiences totaling 51 examination cases (one case/student), 129 general cases (on average 2.5±1.9 cases/student), and 615 supportive periodontal therapy (SPT)/maintenance cases (on average 12.1±4.0 cases/student). All the students passed the oral examinations based on one examination case (“Main Case”), achieved the essential requirements for administering periodontal therapy, and completed the requirements for clinical practice. The system of student clinical practice is also evaluated by the students using a Course Evaluation. Findings from the studentsʼ Course Evaluations are used when considering modifications to the system of predoctoral dental clinical practice at TMDU. In this article, the present status of clinical practice of periodontal therapy by predoctoral dental students at TMDU is reported based on the schedule and performance of students of the graduating class of 2018.
{"title":"Current Status of Clinical Practice of Periodontal Therapy by Predoctoral Dental Students at Tokyo Medical and Dental University (TMDU)","authors":"A. Aoki, Y. Takeuchi, T. Akizuki, K. Mizutani, Sayaka Katagiri, Y. Ikeda, Shogo Maekawa, Kazuki Watanabe, A. Ebihara, M. Hideshima, T. Nikaido, S. Oda, K. Araki, T. Iwata, Y. Izumi","doi":"10.2329/perio.62.38","DOIUrl":"https://doi.org/10.2329/perio.62.38","url":null,"abstract":": During the fifth and sixth year of Dental School at Tokyo Medical and Dental University (TMDU), predoctoral dental students participate in comprehensive clinical practice at the Dental Hospital. The student clinical practice experience is organized into three phases. Phase I consists of clinical simulation practice at each of the Dental Hospitalʼs clinics from September to October of year 5 (6 weeks). This occurs just prior to the start of actual clinical practice. Phase II consists of comprehensive clinical practice at the Student Clinic from November of year 5 to October of year 6 (47 weeks). Phase III involves advanced clinical simulation practice or lectures, where students gain advanced exposure to an area of their interest (5 weeks). This starts after the National Exams held in February of year 6. Regarding the clinical practice of periodontal therapy, every student practices periodontal examination, oral hygiene instruction, initial treatment, and assists with surgical treatment. During Phase II, the clinical practice is supervised by Dental Faculty members. A credit system is employed for the evalu-ation with points awarded for successful completion of training in each clinical procedure. The graduating class of 2018 (51 students) had periodontal therapy experiences totaling 51 examination cases (one case/student), 129 general cases (on average 2.5±1.9 cases/student), and 615 supportive periodontal therapy (SPT)/maintenance cases (on average 12.1±4.0 cases/student). All the students passed the oral examinations based on one examination case (“Main Case”), achieved the essential requirements for administering periodontal therapy, and completed the requirements for clinical practice. The system of student clinical practice is also evaluated by the students using a Course Evaluation. Findings from the studentsʼ Course Evaluations are used when considering modifications to the system of predoctoral dental clinical practice at TMDU. In this article, the present status of clinical practice of periodontal therapy by predoctoral dental students at TMDU is reported based on the schedule and performance of students of the graduating class of 2018.","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87164953","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":"A 10-year follow-up case of comprehensive periodontal treatment for generalized aggressive periodontitis patient with type-1 diabetes","authors":"Yumi Matsumoto, H. Arai","doi":"10.2329/perio.62.16","DOIUrl":"https://doi.org/10.2329/perio.62.16","url":null,"abstract":"","PeriodicalId":19230,"journal":{"name":"Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84394119","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}
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