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改良型電気的根管長測定器の測定精度について
Get PDFapplication/pdfRoot ZX (ZX), a newly manufactured electric root canal length measuring device, has been recently introduced to the market. The manufacturer claims that it can accurately measure the root canal length in existence of electrolytes such as pulp tissue, blood or necrotic tissue in the root canal. This study was done in the clinic of Matsumoto Dental College to determine whether or not ZX had the properties claimed by the manufacturer, using Root Canal Meter (RCM) as control. The results obtained were as follows: 1. When the root canal length measured by a small size reamer (#25 or 30) was compared with that measured by a finally used reamer, in 12 of 20 pulpectomy cases (60.0%) the latter was 0.26±0.18mm longer than the former. On the other hand, in 9 of 13 infected root canal treatment cases (69.2%) at the root canal enlargement, the root canal length measured by a finally used reamer was 0.41±0.29mm longer than that measured by a small size reamer. 2. The differences between the root canal length remeasured at the time of root canal filling and that at the first appointment were examined. In 15 of 20 pulpectomy cases (75.0%), the root canal length of root canal filling was 0.67±0.78mm shorter than that measured at the first appointment. On the other hand, in 9 of 13 infected root canal treatment cases (69.2%), the root canal length at root canal filling was 0.52±0.37mm shorter than that measured at the first appointment. In either case, the root canal length of the first appointment tended to be shorter than that at root canal filling. 3. When a reamer tip was inserted into the root canal until the ZX meter pointed to 0.5 manufacture's the apical constriction reading according to the manual, the RCM reading was also examined. In the case of root canal enlargement, 10 pulpectomy cases (50.0%) and 5 infected root canal treatment cases (38.5%) indicated 40μA or greater of RCM. At the time of root canal filling, 8 pulpectomy cases (40.0%) and 7 infected root canal treatment cases (53.8%) were 40μA or greater. In approximately half of the cases, it was recognized that the reamer tips overextended beyond the apical foramen. 4. The location of the tip of gutta-percha point was examined using a dental X-ray taken immediately after root canal filling was performed. In 11 pulpectomy cases (61.1%) and 5 infected root canal treatment cases (41.7%), the master corn tips extruded from the radiographic root apex. 5. It may be concluded that ZX can measure the root canal length in existence of electrolytes but is somewhat affected by electrolytes.journal articl
Dentistry for Special Patients in Japan
Get PDFapplication/pdf在来の歯科診療システムでは十分な対応が困難な一群の患者がいる.低年齢の幼児や重度の精神遅滞者には,治療処置への協力は期待できない.脳性麻痺などの肢体不自由者のなかには,安定した姿勢の保持や開口が困難な者がいる.重篤な全身疾患を合併した者や内部障害者では,不用意な治療侵襲は重大な危険を招きかねない.人口の高齢化の進行によって,寝たきり老人の口腔ケアも大きな問題となってきた.スペシャル・ペイシェントと呼ばれるこうした人たちの歯科的健康は,健常な人たち以上に重要な意義がある.そこで近年では小児歯科学,障害者歯科学,高齢者歯科学など,新しい臨床歯科医学の領域が発展しつつある.個人開業医を主体とした第一線医療と病院歯科との有機的連携による地域医療の組織化も,この分野へ取り組みを通じて進行しはじめた.各歯科大学での学部教育にも積極的に取り入れられるようになり,めざましい成果が挙がっている.journal articl
下顎右側第一大臼歯の欠損を伴う3症例
Get PDFapplication/pdfIn the treatment of a missing lower first molar, various methods may be considered. Among these are orthodontic methods, prosthetic ones, or a combination of both. This case report describes the successful use of orthodontic technique, which was the uprighting of the second molar and space-closure between the second premolar and the second molar. The treatment results showed improvement of the occlusion and periodontal tissue condition in mesial area of second molar. The usefulness of the orthodontic technique in these cases was recognized.journal articl
上顎洞アスペルギルス症の1例
Get PDFapplication/pdfAspergillus, which is a fungus of the Ascomycetes class, is most commonly encountered in sites including the human paranasal sinuses, liver, spleen, bone, meninges, and especially in the lung. Whereas fungal infection of the paranasal sinuses has been increasing, aspergillosis of the maxillary sinus is rare. However, in recent years, reports of aspergillosis in the field of maxillofacial sugery have been increasing. In this report, we presented a case of aspergillosis appearing in the maxillary sinus of a 71-year-old female. She was referred to our Department with the chief complaint of left cheek pain. X-ray and CT examinations showed a diffuse radio-opacity and calcified materials in the left maxillary sinus. Under clinical diagnosis of sinusitis or supposed aspergillosis, the radical Caldwell-Luc operation was carried out. Histopathological examination of removed materials revealed this lesion to be aspergillosis. Subsequently, the patient has been free from recurrence during the six month period following the operation.journal articl
Local Drug Delivery Systemを用いた高度広汎型若年性歯周炎の一例
Get PDFapplication/pdfPeriocline^[○!R] has been widely used for several years to treat periodontitis by means of the Local Drug Delivery System (LDDS), because of its high susceptibility to the bacteria causing periodontitis. Systemic administration of antibiotics (Tetracycline) for GJP creates a problem. However, our initial preparation of advanced GJP did not clinical improvement. Thus, we have taked pus discharged from the periodontal pocket of a patient with gingival abscess, separated main bacteria (P. intermedia, A. actinomycetemcomitans and Capnocytophaga sp.), and investigated the effect of Periocline^[○!R] on these main bacteria by applying it to the patient clinically. A case of a 24 year-old, male: first visit May 22, 1992-chief complaint, tooth mobility. The patient had gingival abscess with periodontal pocket (6～8mm) 521 1 1246 1246 Growth inhibitory zones obtained by MIC test were 32-52mm in diameter. Periocline^[○!R] (50 mg/tooth) applied eight times weekly reduced the level of GI and pocket depth (2～4mm).journal articl
Held by "Organization of the Education Process in A Higher Mdedical Educational Institution"
Get PDFapplication/pdfThe first international symposium for the academic exchange between Matsumoto Dental College and Moscow Medical Stomatological Institute was held in Moscow on March 24 and 25, 1993. One of the main discussions in this symposium was the dental education in Japan, Russia and Finland. The participants did positively discuss for the dental education in each country and they did carefully listen to each participant's statement as well as his/her opinion. It was a very meaningful and successful symposium for the first step of academic exchange. I have a confidence for the further development of academic exchange between two institutes.journal articl
Clinical Dental Science Education
Get PDFapplication/pdf松本歯科大学において歯科臨床科目に含まれるのは,保存修復学,歯内療法学,歯周病学,全部床義歯学,部分床義歯学,冠・架工義歯学,口腔外科学,口腔診断学,歯科麻酔学,歯科放射線学,歯科矯正学,小児歯科学,障害者歯科学の13科目である.教育目的は,一般臨床歯科医師として必要な基本的な知識と技術を与えることにある.多くの科目での教育方法は,講義,臨床基礎実習,臨床実習の3つに分けて行われている.期間は講義は3年前期より5年前期,臨床基礎実習は4年前期より5年前期,臨床実習は5年の10月より6年の10月までである.実施方法は保存修復学を例にとると,講義は教科書やスライドなどを用いて行われ,臨床基礎実習はマネキンに装着した人工歯顎模型を用いて行われる.臨床実習は,1年間各科に一定期間配属されることによって教育される.いずれの科も,卒業後直ちに臨床に携われるようになるまでに教育することを目標としている.journal articl
『Hunter's Lectures of Anatomy』(1972年刊)について
Get PDFapplication/pdfWilliam Hunter (1717-1783), ten years older than his brother John, was a famous obstetrician and eminent teacher of anatomy in London. He gave private anatomy lectures in the mid-eighteenth century. In 1959, notes of his lectures written by his student, were put up for sale in Adelaide. In 1972, the facsimiles of those notes were published as a book, because those notes have value as historical materials of anatomy, I reviewed this book. Miss Nell Dowd who owns those notes says, "The originals of the lectures reproduced in this book are in two vellum-covered notebooks. The first contains 185 leaves, numbered on the recto side 1-185. There is writing on the recto side only, the verso side bing blank, except for a note on the page opposite the asterisk on page 1, "Sharp is not of this Opinion". The second notebook consists of 114 leaves with writing on the recto side only, followed by several blank leaves. Twenty of the 114 leaves are numbered on the recto side 1-20. The page opposite page 2 has the date 1752 written on it. The manuscripts contain forty-eight lectures under the title "Hunter's Lectures of Anatomy". My on those manuscripts I have come to the conclusion that the lecture notes were taken down in some form of shorthand by Charles White of Manchester, in William Hunter's course which started on January 20, 1752. Were transcribed later, either by Dr White or by a member of his family". 1-11 Lectures are of a general nature, 12-48 Lectures are more detailed. The general lectures consist and of Anatomy, Blood, Artery, Vein, Lymphatick, Gland, Nerve, Muscle, Bone, Skeleton, Cranium discussion. The detailed lectures discuss Bones of the Cranium, Bones of the face, Os Hyoides, Larynx, Muscles of the Head & Face, Muscles of Os Hyoides & Tongue, Salivary Glands, Nose, and so on. I quated above-mentioned le.journal articl