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純チタンの鋳造性に関する研究(第2報) : 埋没材と鋳型温度の違いが鋳込率に及ぼす影響について
Get PDFapplication/pdfThe purpose of this study was to evaluate titanium castability with a vacuum-pressure type casting machine under different mold temperatures. We employed two types of cement bonded investments in this study. One of the casting molds was "Titavest MZ" for metal frame work, and the other was "Titavest CB" for crown and bridge work. The molds temperature were prepared at room temperature, 300℃, 600℃, and 900℃ for each, respectively. When the mold temperature was set at a high range with "Titavest MZ", high percentage of castability was gained. Mold temperature at "Titavest MZ" showed a statistically significant correlation on the castability (p<0.1). On the other hand, "Titavest CB" showed high percentage of castability under every condition. Above results were not quitely explained only by this present study. But, it was realized that at least two different types of investing materials were present; one which had a positive relation to the mold temperature, and the other which had a negative one in relation to the pure titanium castsbility.journal articl
再治療を行った片側性唇顎口蓋裂の一例
Get PDFapplication/pdfAfter orthodontic treatment, a patient with cleft lip jaw and palate was treated with a bone graft and prosthetic treatment by using crown bridge work. However, she had a relapse of the orthodontic problem because of an error from the first prosthetic design and diagnosis. She received orthodontic retreatment and was given a removable partial denture by means of conus crown telescopic systems. As of April 1995, one year and four months since treatment, the patient is satisfied with the results and continues to show good occlusion and facial profile.journal articl
Mini-Plate Fracture
Get PDFapplication/pdfMini-plate fracture was found in a case of the bone grafting after the segmental mandibular excision, and a case of osteomyelitis in the radiographic follow-up examinations. It was emphasized that usefulness of mini-plate would be evaluated by modification in shape and number of mini-plate used for fixation or reconstruction.journal articl
Children's Behavior to Toothbrushing by Parents
Get PDFapplication/pdfClarification of the normal developmental stages with regard to recumbent-position brushing is considered important for the purpose of giving appropriate guidance in teeth cleaning infants. In order to identify the ages at which children may accept recumbent-position brushing, we had a number of mothers perform recumbent-position brushing upon normal preschool children (ages 0-6 years), and observed the children's behavior. 79 children (79.0%), classified as the adaptive group, were seen to have no negative reaction or behavior whatsoever to recumber-position brushing. However, 21 children (21.0%) composed an unadaptive group in which some rejective behavior was observed. As a result of analyses by AIC, the calender age which thus distinguishes the adaptive group from the unadaptive group was 2 years and 6 months. It was concluded that children 2 years and 6 months or older are adaptive to recumbent-position brushing while those less than 2 years and 6 months are unadaptive.journal articl
純チタンの鋳造性に関する研究(第1報) : 鋳造圧が鋳込率に及ぼす影響について
Get PDFapplication/pdfThe purpose of this study was to evaluate titanium castability with all-direction pressure type casting machine, under different casting pressures. A phosphate bonded investing material "T-INVEST C&B" for crown & bridge work was used in this study. Casting pressure was set as 2, 4, 6 and 8kgf/cm^2. When the casting pressure was increased, high percentage of castability was gained. The casting pressure had significant (p<0.05) correlation on the castability. These results indicate that high performance of castability on the titanium was achieved when the casting pressure was increased in an all-direction pressure type casting machine.journal articl
総頸動脈の枝の異常起始
Get PDFapplication/pdfThe following result is found out by observing the Japanese one right internal carotid artery which is very thin and form the intero-occipital trunk. The common carotid artery are covered by the stylohyoid muscle and are divided into two branches ; the intero-occipital and the external carotid. This separating position is for the occipital artery in normal case, and the course is same as one for normal internal carotid artery. The superior thyroid artery, lingual artery and facial artery arise from the common carotid artery. The ascending pharyngeal artery originates from the intero-occipital trunk. After the ascending palatine artery and the posterior auricular artery arise from the external carotid artery, the external carotid artery is divided into the superficial temporal and maxillary artery. The internal carotid artery and the external carotid artery are 1.6mm and 4.5mm in width respectively.journal articl
