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Biomedical subjects

M Kawanami

Publications and source records attributed to M Kawanami.

36 records · Page 2Linked to original sources
PubMed1989

[Clinical and histopathological observation of CaO-P2O5-MgO-SiO2-CaF system glass ceramic tooth implants in monkeys].

The present study was undertaken to determine the biocompatibility of a newly-developed CaO-P2O5-MgO-SiO2-CaF system glass ceramic tooth implant. Two adult male monkeys were selected and 12 weeks after extraction of M1 and P1, 8 glass ceramic teeth were implanted into alveolar bone. At 1 week after implantation, 6 teeth were allowed occlusal function, and 2 teeth were left free from occlusion as control teeth. The implants were observed for 4-12 weeks and examined histopathologically. The results were as follows: 1. Seven implanted teeth were well maintained clinically, and only one tooth was lost after 5 weeks. 2. In histopathological observation, implanted teeth were surrounded by bone, and connected by bonyankylosis. At cervix of dental implant, connective tissue as also attached firmly to implanted tooth surfaces and epithelial attachment was observed. 3. Although these implants were allowed occlusal function at an early stage (1 week after implantation), osteogenesis around implants was not disturbed. These results suggest that the new glass ceramic implant has good biocompatibility and is useful as an implant tooth.

Acrylic Resins↗
PubMed1989

[Objective examination and diagnosis of bruxism. 1. New device for recording muscle activity and tooth contacts during sleeping at home].

The purpose of this study was to make an objective diagnosis of bruxism using a new recording system by observation during sleeping at home. The system was composed of a portable recorder for monitoring bruxism at home and an analyzing device for recalling the data later in laboratory. Muscle activity as recorded by EMG, occlusal tooth contacts were monitored by microvibration pick-up, and grinding sounds were recorded by a small microphone, simultaneously. These were printed on the one recording paper by playing back the tape. Six subjects were selected and were monitored individually for five nights with this new system at home. Records were transcribed and analyzed in the laboratory. As a result, nocturnal muscle activity, occlusal tooth contacts, and grinding sounds were recorded and analyzed efficiently with system. This new system is considered in useful for the investigation and diagnosis of bruxism in periodontal disease.

Bruxism↗
PubMed1989

[Appropriate lymph node dissection in thyroid adenocarcinoma].

Thirty-four patients underwent thyroid surgery for papillary and follicular adenocarcinomas in the period from 1985 to 1989. Fourteen patients were treated with local neck dissection and 20 patients, with modified or radical neck dissection. Cervical lymph node metastasis was found in 25 patients (74%). Our recent policy for lymph node dissection is as follows: When deep cervical lymph node metastasis is clinically demonstrated, radical or modified neck dissection is performed. In patients without clinically demonstrated metastasis, local neck dissection and sampling of the internal jugular chain are performed. When microscopic metastasis is found in frozen sections, modified neck dissection is added. Thus we could select patients for modified neck dissection and choose appropriate neck dissection for more complete cancer clearance without losing postoperative functions.

Adenocarcinoma↗
PubMed1989

[Chronic neutrophilic leukemia associated with monoclonal gammopathy (IgA, kappa type)].

A 62-year-old woman with chronic neutrophilic leukemia (CNL) is described. She presented in February 1988 for evaluation of leukocytosis of 3 years' duration with no complaint. Physical examination was normal. The leukocyte count was 20,100/microliters with 70% segmented neutrophils and 12% band forms. A myelogram showed marked myeloid hyperplasia and plasmacytosis (5.9%). Neutrophil alkaline phosphatase score, serum lysozyme and vitamin B12 levels were elevated. Cytogenetic analysis of the marrow aspirate showed normal karyotype, with no Philadelphia chromosome. Total serum protein (TP) was 7.5 g/dl with increased beta-globulin (23.5%), identified as monoclonal IgA kappa (3.3 g/dl) on immunoelectrophoresis. No activity of G-CSF was detected in the serum. A retrospective study revealed that the beta-globulin level was normal (6.3%, TP 6.9 g/dl) in 1980 and that it was slightly increased (11.6%, TP 7.0 g/dl) without leukocytosis (5,900/microliter) in 1981. In 1985, when leukocytosis obviously existed (9,900/microliter), the percentage of beta-globulin was increased to 17.5% (TP 7.2 g/dl). The possibility that monoclonal gammopathy preceded the leukocytosis must be admitted. On the basis of our observation, it is assumed that CNL and monoclonal gammopathy may be blood dyscrasias derived from a common precursor cell or that the immunological abnormality associated with monoclonal gammopathy may be implicated in the development of CNL.

Female↗
PubMed1989

[A case of hypereosinophilic syndrome associated with eosinophilic endocarditis].

A 66-year-old woman, who had had bronchial asthma, was admitted to our hospital because she suffered from fever, productive cough, wheezing, dyspnea, and chest pressure sensation. Her chest X-ray showed migrating infiltration and marked cardiomegaly. Her ECG at the admission revealed abnormal Q wave and T wave inversion, though that of 3 years before had been almost normal. Hematology showed leukocytosis and eosinophilia of 8,000/mm3 without abnormal cells. All immunological tests were negative and the specific cause of the eosinophilia was unknown. 2 weeks after admission, she complained of severe chest pain suddenly and her ECG showed ST elevation on V1-4 and serum CPK level was elevated to 290 IU/l. By the thrombolytic agent and anticoagulant therapy, her symptom was lightened immediately. 2 months later, we made her cardiac catheterization and myocardial biopsy. Her LVG showed a small aneurysm of the apex, though her CAG was normal finding. The biopsy revealed moderate fibrosis and cellular infiltration including a few eosinophils. We thought that eosinophilic endocarditis had existed first, and secondary embolism continued led to the small infarction. The hypereosinophilia was spontaneously normalized 2 months after admission, but the patient complained of myalgia and sensory disturbance of extremities. The biopsy of quadriceps muscle could prove neither infiltration of eosinophils nor vasculitis. But we diagnosed mononeuritis multiplex due to hypereosinophilia. Judging from various symptoms and laboratory findings, this case was included to the hypereosinophilic syndrome. We also thought allergic granulomatosis and angitis as one of the differential diagnoses, but histologically vasculitis was not proved. In this case, eosinophilia was disappeared without using corticosteroids.(ABSTRACT TRUNCATED AT 250 WORDS)

Aged↗
PubMed1987

Detection of specific antibodies against fimbriae and membrane proteins from the oral anaerobe Bacteroides gingivalis in patients with periodontal diseases.

Sera from a number of patients with periodontal diseases were shown to have specific immunoglobulin G (IgG) antibodies against fimbriae and membrane proteins of Bacteroides gingivalis, a suspected pathogen, by using Western blottin analysis. The sera had a strong tendency to react with fimbriae, or exactly oligomeric structures of fimbriae with a native beta-structure rich-conformation. However, the sera did not react with fimbrilin, a constituent protein of fimbriae, which is denatured by sodium dodecyl sulfate.

Adult↗
PubMed1987

The concentration of lipopolysaccharide on individual root surfaces at varying times following in vivo root planing.

Material with endotoxin activity has been detected in extracts prepared from pooled, periodontally involved teeth, and it has been shown that root planing in vivo reduces the level of such material. However, questions concerning the concentration of endotoxin on the diseased surfaces of individual teeth and questions concerning how rapidly individual root planed tooth surfaces retoxify in vivo have not been addressed previously. Citric acid extracts were prepared from individual, periodontally diseased teeth that had been extracted either from the oral cavity without prior root planing or at varying times up to 12 weeks following root planing. Using a chromogenic Limulus Amebocyte Lysate (LAL) assay, we were able to quantitate the amount of endotoxin associated with diseased root surfaces of individual teeth. We concluded that the extracted material contained endotoxin since it activated LAL and since the LAL-activation was heat-stable, acid-stable and neutralizeable by polymyxin B. The levels of endotoxin found on the root surfaces of these individual, periodontally involved teeth at varying times following in vivo root planing support the following conclusions: the concentration of endotoxin present on diseased root surfaces is markedly reduced, but not eliminated, by in vivo root planing, significant retoxification of root planed surfaces occurs within a relatively short time period after root planing and biological responses to such toxification conceivably may lead to subsequent phases having reduced levels of endotoxin.

Adult↗