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Volume 42 (1992)
- Issue 5 Pages 610-
- Issue 3 Pages 258-
- Issue 2 Pages 164-
- Issue 1 Pages 2-
Volume 42, Issue 2
Displaying 1-13 of 13 articles from this issue
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Tyuya KITAMURA, Hideki SAWA, Fumio MATSUDAIRA, Shohei SANO, Toru SEKIN ...1992 Volume 42 Issue 2 Pages 164-169
Published: April 30, 1992
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSThe following survey was conducted for the purpose of determining the overall attitude of dental school graduates toward their practice. This involves an investigation of on site medical ethics. Eight hundred and forty eight randomly chosen graduates were asked to complete our questionnaire.
Thus the following results were obtained:
1. Over 90% of the graduates feel that both “Dependability” and “Kindness” are equally important concerns during patient care.
2. Over 50% of the graduates indicated that empathy is most important for patient satisfaction.
3. “One's own morality” indicated the highest percentage and “selfrespect of being professional” and “the law followed”. Personal morality is the largest factor determining professional behavior. Professionalism and legal regulations are also of significant influence.
4. Over 90 percent of those surveyed are dissatisfied with the current system.
5. A majority said that they engaged in some self-study of medical ethics.
6. Most graduates indicated that medical ethics should be included in the curriculum, however not as a separate course. It should be covered in various classes throughout a student's training.View full abstractDownload PDF (1111K) -
Yukie YOSHIDA, Yukiko OGAWA, Yoshiko HATANAKA, Ayami KOUNO, Fumiaki SH ...1992 Volume 42 Issue 2 Pages 170-175
Published: April 30, 1992
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSIndividual tooth brushing instruction was given once a year to male workers voluntarily selected in 5 factories in Osaka from 1981 to 1989.
To evaluate the effect of instruction, participants were divided into two groups. Group A was 265 males who were given the instruction twice or more. Group B was 198 males who were given the instruction only once. Changes in oral health conditions were compared in these groups.
Statistically significant differences were observed in rate of persons with the change of debris score and frequency of tooth brushing between the two groups. The average number of teeth lost per year was 0.042 in group A and 0.078 in group B. The mortality of teeth was significantly lower in group A than in group B. These results show how tooth brushig instruction to the factory workers can improve oral health and prevent tooth loss.View full abstractDownload PDF (1184K) -
Hiroshi SEGAWA, Setsuo HAMADA, Cyuzo MIYAZAWA, Tokio SHIMIZU1992 Volume 42 Issue 2 Pages 176-183
Published: April 30, 1992
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESS -
Masami MORIOKA, Reiko KIDO, Atsushi NAGATA, Daisuke HINODE, Seiko ICHI ...1992 Volume 42 Issue 2 Pages 184-190
Published: April 30, 1992
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSDirect cytotoxicity of black-pigmented Bacteroides was studied in the confluent monolayer of human gingival fibroblasts (HGF) in vitro. Only strains from Porphyromonas gingivalis caused morphological alteration (cell-rounding) and notable depression of viability of fibroblasts. This cytotoxicities were remarkably reduced by treating bacterial cells with acidic buffer (pH 3.5) at 37°C for 30 min. To determine the location of the cytotoxicity, bacterial surface components, i. e., outer membrane (OM), lipopolysaccharide (LPS) and outer membrane vesicles (OM-V) from P. gingivalis 381 were prepared and their cytotoxicity was assessed. The cytotoxicity of OM-V was found to be much stronger than that of the other two components, and this cytotoxic factor seemed to consist largely of protein and to be associated with the enzyme activity of OM-V. The effects of some protease inhibitors and L-cysteine on the cytotoxicity of OM-V suggest that the mechanism of cell-rounding is different from that of cell death.View full abstractDownload PDF (1769K) -
Caries of Permanent TeethReiko IWATSUBO, Keizo SUZUKI, Hideaki IMANISHI1992 Volume 42 Issue 2 Pages 191-203
Published: April 30, 1992
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSa comparative study was made in Karakoram (Goma village, 1974), northwest Nepal (Simikot village, 1983) and Yunnan province (Sinong village, 1989). Japanese data (1987) was used for comparison.
1) In Goma and Simikot, the number of cases of permanent tooth caries was extremely small. On the other hand, it was very great in Sinong and Japan.
2) The patterns of DFT can be divided into two groups: one group includes Sinong and Japan, the other Goma and Simikot.
3) The DFT rate according to the location of teeth. The patterns can be divided into two groups, Sinong and Japan, Goma and Simikot.
4) Caries surfaces: in Simikot, there was not a great difference between the number of cases of occlusal, proximal or distal and labiolingual surface caries. In Sinong, both upper and lower jaws had a great number of cases of occlusal surface caries, but the difference between the surfaces decreased according to age.
5) The transition of caries grade: in the three Tibetan areas, the ratio of C4 to all carious teeth was quite similar.
6) Missing teeth: in Goma, where the number of caries cases was extremely small, the number of missing teeth was the greatest after 35 years of age, probably because of severe attrition.
7) Caries ratio of three molar teeth:
Second and third molars: caries increase patterns were similar in the three Tibetan areas and in Japan.
First molar: in Sinong, caries increased rapidly after eruption, Goma and Japan followed Sinong and in Simikot, caries increased very slowly.View full abstractDownload PDF (1984K) -
Toshikazu YASUI, Susumu TANAKA, Hirohiko ONOZAWA, Sonoji TANAKA, Masar ...1992 Volume 42 Issue 2 Pages 204-210
Published: April 30, 1992
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSHypersensitive dentin is an important problem that should be controlled in the clinical fields of preventive dentistry, prosthodontics, and fillings, and especially in patient care in periodontal surgery cases. According to hydrodynamic theory of Brännström, several therapeutic methods have been applied, such as glassionomer cement filling, fluoride application, and protein coagulation. However, such treatments do not sufficiently relieve a patient's various discomforts derived from hypersensitivity of dentin.
We carried out a clinical study on the effect of jelly containing zinc sulfate and aluminum chloride for these discomforts in comparison with that of a control jelly containing NaF.
The reaction towards cold water was improved to 81.8 % for persons and 86.4% for individual teeth (P<0.05). The effects were also observed in the reactions towards cold air and scratching, without any side effects.View full abstractDownload PDF (1482K) -
Tadashi YOSHIKAWA1992 Volume 42 Issue 2 Pages 211-218
Published: April 30, 1992
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSThe aim of this study was to evaluate the effect of the laser irradiation and the presence of fluoride in the remineralizing solution on the remineralization of deminalized enamel. The enamel of ninety human premolars was demineralized artificially. This was then irradiated with a Q-switch Nd-YAG laser and remineralized with two remineralizing solutions, one with and the other without fluoride. To evaluate the mineralized enamel, the mineral content of the enamel was calculated and two acid resistance tests (1. mineral content evaluation after HClO4 immersion, 2. dissolved Ca2+ measurement after lactic acid immersion) were performed.
The results were as follows:
1. In the acid resitance test with HClO4, the presence of fluoride in the remineralizing solution increased the acid resistance of the demineralized enamel.
2. In the acid resistance test with lactic acid,
1) laser irradiation increased the acid resistance of the demineralized enamel,
2) the acid resistance effect of laser irradiation was the same as that of the presence of fluoride in the remineralizing solution, and
3) the highest acid resistance was found in the combined treatment of laser irradiation and remineralization with fluoride.View full abstractDownload PDF (2050K) -
Quantitative Observation of the Decalcified Portion Using Image Analysis at the Site of Initial DecalcificationHiroyoshi TERAJIMA1992 Volume 42 Issue 2 Pages 219-232
Published: April 30, 1992
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSThirty-four molar teeth with decalcification of 37 pits and fissures were utilized to evaluate and clarify the initial changes in the enamel surrounding these sites. Image analyses of photomicrograms, microradiograms, and iso-concentration curves were utilized to evaluate the shape and width of the sites, as well as the frequency of initial decalcification at various locations for each of four pit and fissure shapes.
The results were as follows.
1) Initial decalcification occurred 81.1% of the time in pit regions compared to 18.9% of the time in fissure regions.
2) The frequency of initial decalcification by location was 51.4% in the wall region, 35.1% in the entrance region, and 13.5% in the bottom region.
3) The frequency of initial decalcification by shape of the pits and fissures was 64.9% in type I-2, 13.5% in type I-1, 10.8% in type T, and 10.8% in type I-3.
4) The frequency of initial decalcification by location and shape of pits and fissures was higher on the wall region of type I-2, followed by the entrance region of types I-1, T, and I-2. The frequency was lower in the bottom region of types I-3 and I-2, and the wall region of type I-3.
5) No initial decalcification was noted in the wall region or the bottom region of types T and I-1, or in the entrance region of type I-3.
6) The mean width of the pits and fissures at the site of initial decalcification was approximately 150μm, with most sites wider than 100μm.View full abstractDownload PDF (4946K) -
Fumio MATSUDAIRA, Tyuya KITAMURA, Shohei SANO, Hideki SAWA, Toru SEKIN ...1992 Volume 42 Issue 2 Pages 233-238
Published: April 30, 1992
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSAn opininon survey was made with a questionnaire on medical ethics and social responsibility, and then a comparison was made between dental students and dentists who had graduated from same dental college.
The survey revealed the following opinions. The best policy in dental practice is to get the patient's trust, and to be kind to the patient. Dentists give more attention to attitudes of trust, kindness, and social responsibility than dental students.
In the dentist's opininon, medical ethics should be taught in various departments of the university.View full abstractDownload PDF (1040K) -
Moriyo HINOIDE, Hiroshi KOGA, Kazuhiko INOUE, Susumu IMAI, Yoshinori T ...1992 Volume 42 Issue 2 Pages 239-245
Published: April 30, 1992
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESS -
Takashi HANIOKA, Katsuko IWAKURA, Satoshi SHIZUKUISHI1992 Volume 42 Issue 2 Pages 246-248
Published: April 30, 1992
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSDownload PDF (1129K) -
1992 Volume 42 Issue 2 Pages 255a
Published: 1992
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSDownload PDF (200K) -
1992 Volume 42 Issue 2 Pages 255b
Published: 1992
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSDownload PDF (200K)
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