Shika Hoshasen
Online ISSN : 2185-6311
Print ISSN : 0389-9705
ISSN-L : 0389-9705
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Volume 11, Issue 2
Displaying 1-10 of 10 articles from this issue
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  • THE CONSECUTIVE ROENTGENOGRAPHIC SURVEY ON THE DEVELOPMFNTAL PROCESS OF A CALCIFYING ODONTOGENIC CYST
    Shoichi OSHIMA, Yoshiki NAKAMURA, Akio SATO, Yoshihiko SUZUKI, Koichi ...
    1971 Volume 11 Issue 2 Pages 57-60
    Published: December 30, 1971
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11242/dentalradiology1960.11.57
    JOURNAL FREE ACCESS
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    We have hold a consecutive survey data and its serial radiogram of about 300 children one every year among 10 year duration.
    While in the examination, we came across the development of a odontogenic cyst on the left upper canine one of the children and were fortunate enough traced its behaviour. Her intra-oral radiogram taken at 6 years and 2 months as well as 7 years and 2 months reveiled no abnormaly, but those of 8 years and 2 months showed a fairly clear state of expansion crypt around crown of 3.
    Since that time, this cystic behaviour are not accompanied any searious condition. After its recognizing, the cystic development has kept simillar large of finger-tip size among the duration of 8 years and half.
    Its excision was done under surgical way at 16 years and 11 months of age. This cyst has contained some scattered radiopaque spots, but its appearances are not violency in histologically and clinically.
    Clinical finding of this cystic condition was a calcifying odontogenic cyst.
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  • COMBINING EFFECT OF FILM AND INTENSIFYING SCREEN IN ORTHOPANTOMOGRAPHY
    Masao TAMOGAMI, Takanari YOSHIOKA, Seimei SATO, Toshio NISHIOKA
    1971 Volume 11 Issue 2 Pages 61-65
    Published: December 30, 1971
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11242/dentalradiology1960.11.61
    JOURNAL FREE ACCESS
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    The effective range of a film density in orthopantomographic interpretation is wider than that of routinal radiogram. Its distributing range of their diagnostic informations was found from 0.4 to 2.6 linearly.
    The excellent image quality for diagnostic aid will be obtained from suitable combining with the different film and intensifying screen. We have detected on the different effect of image quality in orthopantomogram used by six types of film and four types of intensifying screen.
    Authors found as follows:
    1. The best effect has obtained from the combining HI-Plus screen (Dupont) and M type film (Sakura) in their image quality.
    2. Better effect has obtained in lower sensitivity screen (Piomex) combining with highest sensitivity film like as Q type (Sakura) or KXL type (Fuji).
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  • CHROMOSOMAL RADIOSENSITIVITY IN LYMPHOCYTES OF RABBIT INDUCED BY 60Co-GAMMA RAYS IRRADIATION IN VITRO
    Fumihiro Sutoh, Tadashi Nakamura
    1971 Volume 11 Issue 2 Pages 66-78
    Published: December 30, 1971
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11242/dentalradiology1960.11.66
    JOURNAL FREE ACCESS
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    Many investigations have been reported for the radiation induced chromosome aberration in circulating lymphocytes of man who recieved the exposure of the various kinds of ionizing radiations through medical use or accidental exposure. For the quantitative study of these chromosome aberrations, a preliminary experiment was carried out, in which the lymphocytes of rabbit was chosen as experimental material and slight modification of human peripheral blood culture technique by Moorhead et al. was introduced. In this report, the dose response relationship of radiation induced chromosome abberations of circulating lympho-cytes of rabbit was studied and the effect of anesthesia, on this relationship was investigated because it was necessary to anesthetize the rabbit in this study for obtaining of enough amount of blood. The results of the present experiments were as follows: 1) the effect of anesthesia on the chromosomal radiosensitivity was negligible, 2) chromosomal dose response relationships of blood lymphocytes of rabbit in vitro was expresed as
    Y=0.6×10-3+1.11×10-3D0.18+9.14×10-5D1.5
    ((Y: incidence of chromosome aberations, D: radiation dose (rads)))
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  • STUDY ON RADIATION STERILIZATION OF SMALL DENTAL INSTRUMENT
    Hiroshi INOMATA, TAKEO MURAI, Daisuke SANJYO, Michio KAWAKAMI, Naoyuki ...
    1971 Volume 11 Issue 2 Pages 79-85
    Published: December 30, 1971
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11242/dentalradiology1960.11.79
    JOURNAL FREE ACCESS
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    Some small dental instruments such as hand piece can not be sterilized with steam, and the complete sterilizing method for them has not been established. However, such instruments as cannot be sterilized by heat may be sufficiently sterilized by means of radiation, and thus, utilization of radiation sterilization in the dental clinic was studied. Results
    1. It was found out that the dose necessary for sterilization was 2.5 MR.
    2. When exposing to radiation of 20 MR, an engine oil for hand piece used in the, dental clinic could be satisfactorily used in the clinic, though the viscosity was slightly changed.
    3. It was found out that rubber dam sheet sterilized with radiation could be used in the clinic.
    Consequently, radiation sterilization may be employed for a wide range of small dental instruments.
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  • THE STUDY OF INTRA-ORAL RADIOGRAPHY PART II, THE INVESTIGATION OF DENTAL X-RAY MACHINES IN JAPAN
    Akira YAMAMOTO
    1971 Volume 11 Issue 2 Pages 86-94
    Published: December 30, 1971
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11242/dentalradiology1960.11.86
    JOURNAL FREE ACCESS
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    Twenty-four dental X-ray machines manufactured by nine manufacturers were investigated on a questionnaire method.
    1) These machines have X-ray tube potential from 60 to 70 kVp.
    2) None of the machines has the diameter of X-ray beam more than 8 cm at the tip of the cone.
    3) The sizes of focal spots were 0.8×0.8mm in all cases.
    4) The target-skin distances were from 15 cm to 20 cm. Only one machine was converted with 30 cm long cone.
    5) The filtrations were adequate.
    6) Only two manufacturer's machines were fitted on Kikuchi's requirments for tube head movement.
    7) Several problems to be solved in future were discussed.
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  • [title in Japanese]
    1971 Volume 11 Issue 2 Pages 95-139
    Published: December 30, 1971
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11242/dentalradiology1960.11.95
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1971 Volume 11 Issue 2 Pages 142-143
    Published: December 30, 1971
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11242/dentalradiology1960.11.142
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1971 Volume 11 Issue 2 Pages 144
    Published: December 30, 1971
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11242/dentalradiology1960.11.144
    JOURNAL FREE ACCESS
    Download PDF (161K)
  • [title in Japanese]
    1971 Volume 11 Issue 2 Pages 145-149
    Published: December 30, 1971
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11242/dentalradiology1960.11.145
    JOURNAL FREE ACCESS
    Download PDF (580K)
  • [title in Japanese]
    [in Japanese]
    1971 Volume 11 Issue 2 Pages 150-151
    Published: December 30, 1971
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11242/dentalradiology1960.11.150
    JOURNAL FREE ACCESS
    Download PDF (170K)
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