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A Case of von Recklinghausen Disease
Get PDFapplication/pdf今回,著者らは齲蝕を主訴としたvon Recklinghausen病の4歳6か月女児の歯科治療を経験したので報告する。1.頸部には広範囲にわたるカフェオレ斑がみられ後頸部が膨隆していた。2.頸椎脊柱管内には腫瘍が認められ,環軸椎亜脱臼により第2 ,3,4頸椎で後方凸の彎曲変形が認められた。3.患児のHellmanの咬合発育段階はIIA期に相当し,臼歯部では齲蝕による崩壊が著しく,前歯部で過蓋咬合を呈した。4.手根骨の化骨状態は骨核数が4個認められ,暦年齢とほぼ一致していた。5.側面頭部エックス線規格写真分析では異常はみられなかった。6.歯科治療に対し協力状態が悪く,頭位を安定にすることが不可能であるために,全身麻酔下で集中歯科治療を行った。journal articl
トライオートZXによる根管拡大・形成について
Get PDFapplication/pdfVarious electric contra-angle handpiece apparatuses for root canal filing have been clinically applied to root canal enlargement and preparation. By using Try-auto (TR-ZX, Morita Corp.) with a cordless handpiece incorporating an electric root canal length measurement apparatus, root canal enlargement and preparation can be performed utilizing the properties of nickel titanium files. In this study, 3 clinicians with different clinical experience (2, 8, and 18 years) performed root canal enlargement and preparation of the extracted human lower incisors using TR-ZX, and by manual method, and the time required for the root canal enlargement and preparation, degree of the reach of the instruments in the root canal, and root canal cleaning level, were evaluated by comparing the results by the use of TR-ZX and by the conventional manual method. The results obtained were as follows: 1. The clinician with 8 years' experience required shorter time to perform the root canal enlargement and preparation by manual method than by using TR-ZX, whereas the other clinicians showed no differences between the time required by manual method and that required by the use of TR-ZX. 2. With regard to the degree of the reach of the instruments, root canal enlargement was performed setting the measurements of the length up to the root apex indicated by the root canal length measurement apparatus incorporated in TR-ZX -0.5 mm as the working length, and the degree of the reach of guttapercha points inserted in the root canal was evaluated, setting the position of the anatomical apical foramen -0.5 mm as the reference point. Good results were obtained by both manual method and the use of TR-ZX, except in 1 tooth, in which poor results were obtained by manual method. By comparing the results based on the differences in clinical experience, clinicians with long clinical experience showed better results by manual method than by the use of TR-ZX, and the results were improved according to the increases in the experience period, whereas clinicians with short clinical experience showed better results by the use of TR-ZX. 3. With regard to root canal cleaning level, the root canal was observed classified into tooth crown side 1/3, middle area 1/3, and apical side 1/3, and the cleaning level was almost good in the tooth crown side area and middle area of the root canal, showing no differences in the level between by manual method and using TR-ZX, except in 2 middle areas, in which poor results were obtained by the use of TR-ZX. Concerning the cleaning level in the apical area, clinicians with long clinical experience showed better results by manual method than by the use of TR-ZX, and the results were improved according to the increases in the experience period, whereas clinicians with short clinical experience showed better results by the use of TR-ZX.journal articl
The Establishment of the Medical Insurance System for Children in Japan
No full textPdepartmental bulletin pape
歯科用小型コーンビームCT(3DX)運用1年における150症例の分析
Get PDFapplication/pdfThe conventional radiography is used for diagnosis of dental field. But those images cannot diagnose any cases because they are two-dimensional images. The conventional computed tomography can be used in some cases, but there are big problems about radiation dose, resolution of images and the cost of examinations. Therefore, the newly computed tomography for dental use was developed whose name was "3DX multi image micro CT" (3DX, J. Morita. MFG, Kyoto, Japan). The advantages of this system are very low dose, small in size and distinct tomographic images. The 3D sectional images by this system are very useful especially for dental use. The purpose of this study was to analyze these cases, and investigate the usefulness of 3DX. The first system was run in Matsumoto Dental University Hospital in May 2001. The cases investigated monthly and total number of cases, average, maximum and minimum ages of patients, gender and the condition of orders (objects, clinical, diagnosis etc) during one year. There were 150 cases from Jun 2001 to May 2002. The monthly number was 20 cases in Jun 2001. The maximum one was 43 cases in May 2002. The average age of patient was 34.4 years old (max.76, min.6). The gender was 70 females and 80 males. The distribution of clinical diagnosis was as follows; Impacted teeth 37 cases, apical periodontitis 35 cases, implant 15 cases, temporomandibular disorder 12 cases, supernumerary teeth 7 cases, fracture 4 cases and other diseases were 40 cases. According to the analysis of 150 cases, it is proved that 3DX is very useful for dental clinics. Since 3DX images cannot only present dental information of the disease in dental field but also this system can be effective for general practice and oral surgeons.journal articl
