著者
河野 雅臣 福田 治久 藤久保 美紀 佐伯 康弘 菅原 えりさ 木村 哲
出版者
一般社団法人 日本歯内療法学会
雑誌
日本歯内療法学会雑誌 (ISSN:13478672)
巻号頁・発行日
vol.41, no.2, pp.91-102, 2020 (Released:2020-06-15)
参考文献数
71

Abstract : Background : Aseptic root-canal treatment (aRCT), in which a bacteria-free protocol is used, results in a high success rate of approximately 90%. However, most Japanese patients do not receive aRCT due to unsuitable procedures that put emphasis on saving cost. Purpose : The aim of this study was to estimate the cost-effectiveness of aRCT in Japan with a cost-utility analysis (CUA). Methods : We used CUA to estimate the cost-effectiveness of aRCT against septic RCT (sRCT) which is thought to be commonly performed in Japan, and evaluated CUA using the incremental cost-effectiveness ratio (ICER). The ICERs were compared with criteria. The expected costs of aRCT were estimated using the fees of Medicaid in the United States and the scheduled fees of the Swedish medical insurance system. The expected cost of sRCT and endodontic surgery (ES) were estimated using the fees of the Japanese reimbursement system. The utility of RCT and ES were quantified with quality-adjusted life years (QALY) calculated by the QOL value of one tooth loss, the rate of RCT failure, and the life expectancy of the median age of the Japanese population. Results : In Japan, the ICERs of aRCT compared with sRCT were lower than the smallest criterion, 5,000,000 yen. Conclusion : The results of this study revealed that aRCT may be a cost-effective procedure in Japan.
著者
石井 信之 浜田 信城 渡辺 清子
出版者
一般社団法人 日本歯内療法学会
雑誌
日本歯内療法学会雑誌 (ISSN:13478672)
巻号頁・発行日
vol.29, no.1, pp.26-29, 2008 (Released:2017-12-30)
参考文献数
10

Abstract : Hypochlorous acid is a weak acid with the chemical formula HClO. It forms when chlorine dissolves in water. HClO is an acid involving a polyatomic ion. HClO is used as a bleach, oxidizer, deodorant, and disinfectant. CampherTM contains 80% HClO and is used as a food disinfectant, deodorant, air cleaner, and in instrument and package cleaner systems. The purpose of this study was to examine the efficacy of CampherTM as a root canal irrigant in endodontics. Both pH 6.5 and pH 7.0 CampherTM were examined for bactericidal effect and cytotoxicity. Obligative anaerobic bacteria were completely inhibited by applying CampherTM for 1 minute, and facultative bacteria was inhibited 10−2~10−3 by CampherTM for 1 minute in bactericidal effect. The growth of oral epithelial cells was not affected by CampherTM for 48 hours. Both bactericidal effect and cytotoxicity did not vary with the different pH of CampherTM. These results suggested that CampherTM has a bactericidal effect and no cytotoxicity, and could be useful as a root canal irrigant.
著者
中村 裕子 杉山 僚 小此木 雄 関根 慧 牛込 瑛子 高橋 慶壮 小谷 依子 中村 幸生
出版者
一般社団法人 日本歯内療法学会
雑誌
日本歯内療法学会雑誌 (ISSN:13478672)
巻号頁・発行日
vol.31, no.1, pp.29-35, 2010 (Released:2017-11-30)
参考文献数
35

Abstract : The aim of this study was to investigate the antimicrobial effects of electrolyzed neutral water (Perfect Perio®) (PPW) on Enterococcus faecalis formed biofilm. This PPW contained hypochlorous acid concentrations at 600-700 ppm in pH 7.5. The effects of PPW were compared with those of NaClO and sterilized water (DW). Biofilms of E. faecalis were induced on tissue-culture plates. An overnight culture of E. faecalis grown in brain-heart-infusion broth was seeded (initial concentration of 107-8 cells/mL) with trypticase soy broth (with 0.25% glucose), which was incubated under aerobic conditions for 48h to allow biofilm formation. After incubation, the biofilms were irrigated with PBS and treated as irrigants. The remaining biofilms were stained with crystal violet to gratify the amounts of biofilm, which were determined using a microplate reader. Morphological changes of E. faecalis biofilm by NaClO, PPW or DW were investigated by SEM. NaClO can disaggregate and remove biofilm at all times, and treatment with PPW can cause a high degree of biofilm disaggregation. SEM analysis showed that 5% NaClO eliminated the bacteria completely, PPW was capable of disrupting and removing the biofilm, but not eliminating the bacteria. According to the results, PPW showed the highest eliminatory effect on the E. faecalis-derived biofilm.
著者
澤田 則宏 的場 一成
出版者
一般社団法人 日本歯内療法学会
雑誌
日本歯内療法学会雑誌 (ISSN:13478672)
巻号頁・発行日
vol.38, no.2, pp.107-113, 2017 (Released:2017-06-20)
参考文献数
6

Abstract : Nickel-titanium files can be used to prepare curved canals, but cannot penetrate the original canals if a previous dentist modified the root canal morphology. Negotiation, patency, and glide path before nickel-titanium instrumentation are important for success. This case report introduces a novel technique for negotiating root canals. Negotiation was performed by the novel technique using clockwise and counter-clockwise motion of the engine in three cases. This technique was effective in cases of a ledge in retreatment, a canal not easy to access, and challenging anatomy.
著者
角竹 功次 吉岡 隆知 北島 佳代子 五十嵐 勝
出版者
一般社団法人 日本歯内療法学会
雑誌
日本歯内療法学会雑誌 (ISSN:13478672)
巻号頁・発行日
vol.36, no.3, pp.126-129, 2015 (Released:2017-09-30)
参考文献数
20

Abstract : We experienced a case of accidental ingestion of a root canal instrument. At first, surgical extraction was suggested by a medical doctor, however, the therapeutic strategy was changed upon presentation of a previously published paper. After ingesting fibrous foods, the patient excreted the instrument naturally on the seventh day. The maintenance of guidelines on accidental ingestion would enable treatment policies to be shared with other medical departments.
出版者
一般社団法人 日本歯内療法学会
雑誌
日本歯内療法学会雑誌 (ISSN:13478672)
巻号頁・発行日
vol.25, no.1, pp.27-35, 2004 (Released:2018-02-28)
参考文献数
12

Abstract : Before the acceptance of endodontic treatment, a huge caries tooth has been often left without any treatment for a long time. A few patients first visit a dental office due to the appearance of intolerable strong toothache. In these cases, the biologic width of tooth is frequently invaded by subgingival caries. These caries cause various troubles for attaining the final prosthesis after root canal treatment. Furthermore these teeth took not only dental movement (inclination, extrusion) but also inadequate occlusal plane. In this case report, we reported a patient who was treated with a comprehensive approach in a narrow sense, where MTM, periodontal surgical treatment and implant were performed for preservation to arrange the periodontal environment and occlusal plane from the root canal treatment until the final prosthesis. These treatment recovered the purpose of esthetic and the occlusal reconstruction on a oral unit.
著者
田口 正博
出版者
一般社団法人 日本歯内療法学会
雑誌
日本歯内療法学会雑誌 (ISSN:13478672)
巻号頁・発行日
vol.34, no.3, pp.135-139, 2013 (Released:2017-10-31)
参考文献数
14

Abstract : In daily dental practice, hand hygiene is performed before putting on gloves to carry out medical treatment. However, if the glove is in contact with an unsanitized area and when there is not sufficient time to change the gloves, an alternative disinfection procedure involving antiseptic hand rub (AHR) or washing under running water while wearing the gloves may be unavoidable. This study examined the risks of this disinfection procedure, to check whether or not the gloves might be perforated. Three types of gloves were used in the tests : two latex gloves (powdered and unpowdered) and unpowdered nitrile gloves. As a hand disinfectant, an ethanol-based formulation containing 0.2% benzalkonium chloride was used. The procedure employed for the three different types of gloves was : 1) to conduct AHR or 1-minute hand washing under running water after wearing gloves, and 2) to repeat a “rock-scissors-paper” movement five times as a medical simulation. The gloves were then examined for perforations using the water-proof test according to Japanese Industrial Standards (JIS), by repeating the procedure once, then five times, and finally ten times. As a result, there were no significant differences among the three types of gloves in the occurrence of perforation by the hand hygiene methods described above, or by the number of times that hand hygiene was conducted (Fisher’s exact test : p>0.05). The potential occurrence of perforations of gloves is low even when washing the hands with water or AHR while wearing the gloves.
著者
藤井 理絵 関根 智之 山田 雅司 八ッ橋 孝彰 柏木 勢 森永 一喜 中川 寛一
出版者
一般社団法人 日本歯内療法学会
雑誌
日本歯内療法学会雑誌 (ISSN:13478672)
巻号頁・発行日
vol.31, no.2, pp.108-112, 2010 (Released:2017-11-30)
参考文献数
12

Abstract : The implant periapical lesion (IPL), which is a possible cause of implant failure, may occur due to the presence of a pre-existing microbial pathology such as endodontic/periodontal lesions. A 27-year-old female patient underwent the placement of a screw-shaped submergible titanium dental implant in the maxillary anterior region. Six months after implant insertion, the patient visited our hospital and presented with a persistent pain resistant to analgesics. A periapical x-ray showed the presence of a radiolucency at the apical portion of the implant ; this image was confirmed by cone beam CT. Root canal treatment was performed to restore the bone defect in the neighborhood of the fixture. This paper presents a case history related to IPL, which was caused by a pre-existing endodontic lesion.
著者
新井 恭子 赤松 俊嗣 長谷川 有紀 北島 佳代子 五十嵐 勝
出版者
一般社団法人 日本歯内療法学会
雑誌
日本歯内療法学会雑誌 (ISSN:13478672)
巻号頁・発行日
vol.30, no.1, pp.30-35, 2009 (Released:2017-11-30)
参考文献数
30

Abstract : This case report describes the root development following apexification of an immature tooth. The patient was a 9-year-old girl. The upper right central incisor suffered apical periodontitis with gingival abscess after rapid orthodontic treatment with a removable appliance. The root canal was cleaned by both biomechanical preparation and biochemical preparation with 6% sodium hypochlorite and 3% hydrogen peroxide. After disinfection of the root canal, calcium hydroxide paste was applied. The medicaments were replaced several times during the follow-up term. After five years and six months, radiographic images showed disappearance of the apical lesion and continuous root development. The shape of the root-end was an irregular, sharp-pointed outline with narrow canal. Following confirmation of the calcified apical barrier at the root end by palpation with a K-file, the lateral condensation procedure with a custom cone and canal sealer was done. This report suggests that root development after apexification occurs because of the existence of apical vital tissue even if the tooth is a non-vital tooth with open apex.
著者
内田 雄士 柴 秀樹 河口 浩之 栗原 英見
出版者
一般社団法人 日本歯内療法学会
雑誌
日本歯内療法学会雑誌 (ISSN:13478672)
巻号頁・発行日
vol.32, no.3, pp.226-231, 2011 (Released:2017-10-31)
参考文献数
15

Abstract : Cone-beam computed tomography (CBCT) and dental microscope are useful for diagnosis and treatment in endodontic therapy. CBCT is designed to produce three-dimensional information about undistorted tooth root canals and the shape of periapical lesions. A dental microscope is effective for identifying the subvisible narrow root canal orifice, location of root perforation and fractured instrument in the root canal. This report describes the treatment by CBCT and microscope of an endodontic lesion caused by perforation. The patient was a 49-year-old woman. X-ray photographs of the mandibular right first molar showed a periapical lesion and a perforation near the intracanal post on the middle of the distal surface of the distal root. The closed orifice of the distal root canal was searched for on CBCT images, and located under a dental microscope. The root canals and perforation area were filled by gutta-percha after checking sterilization with a bacterial examination. The prognosis was good 18 months after the root canal filling. This case suggests that an exact diagnosis with CBCT and fine treatment under a dental microscope improve the success rate of complex cases of infected root canal and infected root perforation.