巻号一覧
67 巻 (2000)
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67 巻, 1 号
選択された号の論文の17件中1～17を表示しています
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三浦 宏之2000 年 67 巻 1 号 p. 1-10
発行日: 2000/03/31
公開日: 2010/10/08
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谷口 尚2000 年 67 巻 1 号 p. 11-17
発行日: 2000/03/31
公開日: 2010/10/08
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―第1報 当科における有病者に関する臨床統計学的研究―長尾 浩史, 立川 敬子, 内田 亘, 平 健人, 塩田 真, 榎本 昭二2000 年 67 巻 1 号 p. 18-22
発行日: 2000/03/31
公開日: 2010/10/08
ジャーナル フリーA retrospective study on medically compromised patients was made using 1, 000 outpatients who visited the Clinic for Oral Implant, University Hospital, Faculty of Dentistry, Tokyo Medical and Dental University between April 1995 and June 1998.
The results were as follows:
1. 35.3% (353 patients ; 140 males and 213 females) of the outpatients were medically compromised.
2. The greatest number of medically compromised patients was in the 50-59 age group (118 cases), followed by those in the 40-49 and 60-69 age groups.
3. The highest ratio of medically compromised patients was in the 60-69 age group (48.2%), followed by those in the 70-79 and 50-59 age groups.
4. Among the 353 patients, 96 (27.2%) underwent surgical treatment such as insertion of implant (68 cases), removal of implant, extraction of tooth, and free gingival graft.
5. Among the 68 patients who underwent insertion of implant, in a classification by type of disease, the patients with cardiovascular diseases were the most numerous (33.9%), followed by metabolic and digestive tract diseases.
6. All surgical treatments of implant insertion were performed under local anesthesia, while monitoring cardiac and respiratory function, and SpO2. Among the 68 patients, 9 underwent operation under intravenous sedation and 2 under nitrous oxide inhalation sedation. All 11 patients had hypertension.
The results suggested that identification of preoperative risk factors, precise recognition of general condition, and establishment of control system are important to manage medically compromised patients for dental implant treatment.抄録全体を表示PDF形式でダウンロード (714K) -
伊藤 公一2000 年 67 巻 1 号 p. 23-37
発行日: 2000/03/31
公開日: 2010/12/08
ジャーナル フリーThe purpose of this study was to investigate the effect of early fixation of the coronal suture on the skeletal growth pattern of maxillary complex in rat. Rats were sacrificed at 2, 4, 6, and 8 weeks after operation and their dryskulls were prepared. Computerized images of dorsoventral cephalograms were measured and analyzed statistically.
The left coronal suture in the experimental group was fixed with cyanoacrylate adhesive at 4 days old, and the rats were fed with hard diet after weaning. Their snout bent towards the operated side 4 weeks after operation and then had a tendency to grow back towards the mid line. The left palatine bone was the most affected in the maxillary complex. There were no specific findings in the maxilla. Catch up growth of the left palatine and premaxillary bone was found 4 weeks after operation.
On the other hand, this catch up growth was hardly found in another experimental group, which upper and lower incisor edges were trimmed every other day and received a soft diet.
A number of direct measurements on the palatine and the premaxillary bone indicated compensatory growth following the changing masticatory function such as incisor edges trimming and diet difference.
It was concluded that functional effects of incisal occlusion might suppress skeletal deformity formed with unilateral coronal synostosis.抄録全体を表示PDF形式でダウンロード (7523K) -
磯部 知巳, 下山 和弘, 植松 宏, 寺岡 加代2000 年 67 巻 1 号 p. 38-45
発行日: 2000/03/31
公開日: 2010/10/08
ジャーナル フリーThe purpose of this study was to investigate the level of oral health awareness and oral health care activities of home helper for dependent elderly.
A questionnaire was mailed to persons who took the profession course of care worker training and education (second and third grade) for home helper and short term course (special subject) at care worker support center foundation (33 branches) . Responses were obtained from 220 persons qualified as home helpers. Of 220 home helpers, 104 (47.3%) had worked as a home helper for fewer than six years. One hundred forty two (64.5%) were trained and educated for a home helper as a second grade. The results were as follows:
1. One hundred eleven ( 50.5%) had used a dental floss and an interdental brush.
2. Two hundred eighteen (99.1%) thought it was necessary to perform oral cleaning of dependent elderly.
3. Two hundred fifteen (97.7%) hoped to perform the oral cleaning of dependent elderly.
4. Two hundred nine (95.0%) considered oral cleaning distasteful.
5. Two hundred three (92.3%) recognized food debris between natural teeth and the denture of dependent elderly who could perform oral cleaning themselves.
6. Two hundred three (92.3%) recognized food debris between natural teeth and the denture of dependent elderly who could not perform oral cleaning themselves.
7. One hundred twenty (54.5%) had been trained in oral cleaning for dependent elderly.
8. Two hundred twelve (96.4%) hoped to receive training in oral cleaning for dependent elderly.抄録全体を表示PDF形式でダウンロード (1257K) -
田中 光郎, 増田 美奈子2000 年 67 巻 1 号 p. 46-51
発行日: 2000/03/31
公開日: 2010/10/08
ジャーナル フリーThe purpose of this study was to know the range of fluctuation of inorganic ion concentrations and pH in the unstimulated whole saliva and also to know if there is individual difference between subjects which surpasses this fluctuation. Whole saliva was collected seven times between 9 AM and 4 PM at one- or two- hour intervals from ten subjects aged 24 to 27 years. The inorganic ion concentrations and pH were analyzed using an ion chromatogram and a pH electrode respectively. The coefficients of variation of the inorganic ion concentrations were between 24% to 43%, indicating that it is misleading to interpret only one data obtained as the true value of the subject. However, statistical analysis showed that the pH value and inorganic ion concentrations were significantly different among many of the subjects, in spite of the fluctua tion within individual subjects. On the other hand, most of the correlations were statistically significant among pH and each of the inorganic ions. Above all, the correlation coefficient between potassium and phosphate ion concentrations was high. In contrast, the sodium ion did not have any significant correlation with most of the other ions. The results were discussed in reference to the salivary secretion mechanism.抄録全体を表示PDF形式でダウンロード (670K) -
―鋳造用合金による影響―杉田 拓也, 高久田 和夫, 宮入 裕夫2000 年 67 巻 1 号 p. 52-57
発行日: 2000/03/31
公開日: 2010/10/08
ジャーナル フリーExperimental crowns with uniform thickness at their axial surfaces were made of dental casting goldsilver-palladium alloy (12 % gold) and dental casting gold alloy (Type IV) . They were cemented on model teeth for abutment and their deformations under applied loads were measured with strain gages. The effect of axial metal thickness on the crown's rigidity and the cement fracture strength were examined. Among the structures of cemented crowns and abutment teeth, that of the axial metal thickness of 0.3 mm had cement failure at the smallest loads. As the metal thickness was increased, the crown's deformation decreased and the cement failure load increased. For a thickness greater than 0.7 mm, however, the increase in failure load was not obvious. The difference of the casting alloy had no significant effect on the cement fracture. Accordingly, the rigidity of dental prostheses should be one of the most important design factors for preventing failure under occlusal load, and it is recommended that the thickness of the axial surface should be more than 0.7mm.抄録全体を表示PDF形式でダウンロード (872K) -
飯島 英世, 宮新 美智世, 片野 尚子, 江橋 美穂, 松村 木綿子, 三輪 全三, 高木 裕三2000 年 67 巻 1 号 p. 58-62
発行日: 2000/03/31
公開日: 2010/10/08
ジャーナル フリーIt is very important to examine fine cracks on the crown surface of traumatized tooth in the dental clinic because the presence of these cracks may cause discomfort or hypersensitivity of the tooth. By the emission of routinely used light, it is difficult to illuminate cracks, and the usual intraoral photography using strobe light emission is not useful to make records of cracks in most cases.
In the present study, a method for taking pictures to record tooth crown cracks was newly developed using LED as a light source, and applied to patients with traumatized teeth in the dental clinic.
The results were as follows:
1. Cracks on the tooth surface could be confirmed with the LEDs of all the colors used in this study. However, the blue LED enabled cracks in the incisal edge part to be more easily confirmed, and the white LED enabled cracks in the cervical part to be more easily confirmed.
2. Cracks of multiple modalities on the tooth surface was illuminated more often when the LED light was emitted at 45°C to the axis of the tooth than 90°C .
3. The light exposure field became wider by the use of the LED of diameter 5 mm than that of diameter 3 mm. However, the LED of diameter 3 mm was more favorable than that of diameter 5 mm for the observation of the cracks because the former could more easily change the direction of light emission.抄録全体を表示PDF形式でダウンロード (5112K) -
小山 富久2000 年 67 巻 1 号 p. 63-69
発行日: 2000/03/31
公開日: 2010/10/08
ジャーナル フリーGuided bone regeneration (GBR) has attracted much attention as a means to treat bone defects and congenital malformation. However, presently available materials are not ideal and further improvements are necessary. Hence we have been developing a novel bioabsorbable composite materialβ-TCP/CPLA for the GBR technique. The polymeric matrix is a copolymer of poly-L-lactide acid and fatty polyester (CPLA) that is biodegradable by hydrolysis, and the ceramic filler is β-tricalcium phosphate (β-TCP) that is bioabsorbable and has good osteoconductivity. The materials were evaluated by in vivo and in vitro experiments. Furthermore, animal experiments with mandibular bones defects in dogs were carried out. Good bone regeneration was observed in the case of the treatment with β-TCP/CPLA membrane whereas almost no bone regenerated in the cases without the membrane. β-TCP/CPLA membranes were suggsted to have promising properties for bone defect treatment.抄録全体を表示PDF形式でダウンロード (9607K) -
―第2報 筋放電持続時間からの咀嚼効率の解析―田中 義浩2000 年 67 巻 1 号 p. 70-80
発行日: 2000/03/31
公開日: 2010/10/08
ジャーナル フリーFor analysis of parameters, which can represent stomatognathic function, a possibility for the estimation of masticatory efficiency without analyzing food comminution was shown in Part I. Since there is a necessity for more precise estimation of masticatory efficiency to enable comparison with other parameters, the variance from the central value of food particle size was quantified and a new evaluation of masticatory efficiency, which can be adapted to any comminuted foods and has a good reproducibility was devised. The relationship between the masticatory efficiency originating from the side of comminuted food and the parameters that represent a variance of electromyogram (EMG) duration was analyzed. Then, the total variances of EMG duration, originating from working side masseter, corresponding to the task, which is consumed by food comminution, were calculated. That is the masticatory efficiency, which can be found from the side of EMG. A negative correlation between masticatory efficiencies, originating from the sides of food comminution and power supply was found. Therefore, estimation of masticatory efficiency using EMG measurements from the side of EMG may be possible.抄録全体を表示PDF形式でダウンロード (3746K) -
佐藤 多加夫2000 年 67 巻 1 号 p. 81-89
発行日: 2000/03/31
公開日: 2010/10/08
ジャーナル フリーIt has been demonstrated that palatal shelf epithelium transforms into mesenchymal cells during fusion of the secondary palate. However, the fate of epithelial cells in primary palate formation is still unclear. To specify the presumptive fusion area of the primary palate, focal labeling of epithelial cells of medial nasal prominence (MNP), lateral nasal prominence (LNP) and maxillary prominence (Mx) of gestational day 12.0 rat embryos was initially done with fluorescent DiI, and they were cultured for 24 h. As a result, the presumptive fusion area was identified and it was found that there was a difference of the fusion process between MNP-Mx and MNP-LNP. Next, in order to elucidate the fate of epithelial cells in the fusion areas, facial epithelium was labeled with a recombinant adenovirus, Adex-LacZ in the whole embryo culture system and they were observed over time (12h, 24h, 36h and 48h) . LacZ positive cells were observed in the fused region of MNP-Mx and MNP-LNP. Moreover, it was found that there were not only double positive cells of LacZ and TUNEL staining of apoptosis but also some TUNEL nonpositive cells. These findings indicated that a number of epithelial cells in the fusion area become apoptosis, but some cells survive by epithelialmesenchymal transformation during primary palate formation.抄録全体を表示PDF形式でダウンロード (8988K) -
岩佐 康行, 下山 和弘, 植松 宏, 大谷 啓一2000 年 67 巻 1 号 p. 90
発行日: 2000/03/31
公開日: 2010/10/08
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東中川 真木子, 朝比奈 泉, 榎本 昭二2000 年 67 巻 1 号 p. 91
発行日: 2000/03/31
公開日: 2010/10/08
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桔梗 知明, 齊藤 美紀, 石川 雅章, 高木 裕三2000 年 67 巻 1 号 p. 92
発行日: 2000/03/31
公開日: 2011/03/22
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鳥居 秀平, 柴田 俊一, 鹿野 俊一, 野沢 亜希子, 山下 靖雄2000 年 67 巻 1 号 p. 93
発行日: 2000/03/31
公開日: 2010/10/08
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池田 美子, 柳下 正樹2000 年 67 巻 1 号 p. 94
発行日: 2000/03/31
公開日: 2010/10/08
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2000 年 67 巻 1 号 p. 97-114
発行日: 2000/03/31
公開日: 2010/10/08
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