The Journal of Nihon University School of Dentistry
Online ISSN : 1884-2984
Print ISSN : 0029-0432
ISSN-L : 0029-0432
Current issue
Showing 1-7 articles out of 7 articles from the selected issue
  • Kok Han Ng, Chong Huat Siar
    1997 Volume 39 Issue 4 Pages 171-175
    Published: 1997
    Released: March 11, 2011
    JOURNALS FREE ACCESS
    This report reviews the clinicopathologic characteristics of 104 cases of odontomas diagnosed in the Division of Stomatology, Institute for Medical Research, Kuala Lumpur, over a 29-year period (1967-1995). The results showed no real predilection in terms of sex (M : F ratio, 1 : 1), race (45.2 % Malays, 40.4 % Chinese, 10.6 % Indians and 3.8 % other races) or site (maxilla : mandible ratio, 1 : 1.04) distribution. The mean age at presentation was 24.8 years and the age range was 3-74 years. There were 102 intraosseous and 2 extraosseous odontomas. Swelling was the most common presenting complaint. The majority of cases (81.9%) were clinically diagnosed as odontomas. The treatment of choice was surgical enucleation. Compound (43.3%) and complex (35.5%) odontomas were the two most common histological types encountered. The present findings correlate favorably with reported studies from other geographic areas.
    Download PDF (2556K)
  • Ricardo Della Coletta, Sílvio Sanches Veiga, Sergio Roberto Per ...
    1997 Volume 39 Issue 4 Pages 176-181
    Published: 1997
    Released: March 11, 2011
    JOURNALS FREE ACCESS
    Rabbit polyclonal antibody against mouse EHS laminin was used to investigate the distribution and composition of laminin in the rat first molar tooth germ. Immunohistochemical analysis showed that laminin is expressed in the inner and outer epithelia of the enamel organ and in small blood vessels in the dental papilla and strellate reticulum. Immunoblots revealed that tooth germ laminin differs from EHS laminin. Tooth germ laminin contains β chains, while the al chain is substituted by a 300-kDa chain. Two-dimensional electrophoresis analysis of tooth germ extract showed that β chains appeared as four spots with approximate pI values of 6.6, 7.5, 7.8 and 8.5. These results indicate that more than one type of laminin isoform is present in the first molar tooth germ. Additionally, we have shown that despite the early degradation of tooth germ basement membrane, the laminin molecule is still intact at the time of birth.
    Download PDF (3035K)
  • Kichibee Otsuka, Mitsuhiro Ohshima, Masamichi Kaku, Takaki Kajima, Mas ...
    1997 Volume 39 Issue 4 Pages 182-190
    Published: 1997
    Released: March 11, 2011
    JOURNALS FREE ACCESS
    A useful gelatinolytic enzyme assay for fibroblasts, utilizing a novel sample preparation method for collagenase with dithiothreitol (DTT) treatment to inactivate endogenous collagenase inhibitors, was developed using soluble fluorescein isothiocyanate (FITC) -labeled gelatin. The substrate, gelatin was prepared by heating commercially available FITC-labeled type I collagen. The denatured collagen was cleaved with purified trypsin and partially purified fibroblast gelatinase, and the digested FITC-fragments were measured fluorometrically. The intensity of the fluorescence was in proportion to the reaction time and enzyme concentration. Both enzyme activities were measurable within the nanogram range of enzyme preparations. The enzyme activity was detected after 4-aminophenylmercuric acetate (APMA) treatment which was completely inhibited by metalloproteinase inhibitors, but not by serine-and cysteine-proteinases' inhibitors. Conditioned media of human periodontal ligament fibroblasts (PLF) and gingival fibroblasts (GF) were separately treated with DTT prior to the enzyme assay, and then the assay was performed in the presence of APMA. The enzyme activities of PLF and GF were 106-and 55-fold higher than those of the conventional gelatinase assay which was carried out without DTT treatment. This assay method allowed the measurement of gelatinolytic enzyme activity when tissue inhibitors of metalloproteinases were present in the fibroblast culture medium.
    Download PDF (3031K)
  • Marcos K. Yamamoto, Moacyr D. Novelli, João Gualberto C. Luz
    1997 Volume 39 Issue 4 Pages 191-195
    Published: 1997
    Released: March 11, 2011
    JOURNALS FREE ACCESS
    The effects of unilateral extraction of the upper incisor (one tooth) on facial growth of young rats were studied. The remaining upper incisor showed deviation towards the opposite side, and there was regular dental wear of all the incisors. The effects were evident only in the mid-facial area. Cephalometric measurements showed significant shortening with deviation of the incisor bone on the extraction side. There was no significant disturbance of the growth of the rest of the maxilla and mandible. These results indicate that upper incisor extractions have a localized influence, leading to impairment of incisor bone growth.
    Download PDF (1941K)
  • Kazutaka Kasai, Eisaku Kanazawa, Hirofumi Aboshi, Lindsay C. Richards, ...
    1997 Volume 39 Issue 4 Pages 196-201
    Published: 1997
    Released: March 11, 2011
    JOURNALS FREE ACCESS
    The purpose of this study was to provide information about arch shape variations among South Pacific populations. The application of Fourier transforms, Y (0i) =ao/2+Σ (aicos φi + bisin0i) was used to separate two components of variation;size and shape. Dental arch size can be described by one coefficient (ao), while the shape can be summarized by the first three harmonics (ampl-3) in the Fourier series. The materials used in this study were dental casts of South Pacific populations (Fiji, Western Samoa and Kiribati), Australian Aboriginals and Japanese. Fijians, Western Samoans and Kiribati people have larger upper and lower dental arches than that of Japanese. These populations were separated by the arch size and first Fourier amplitudes which showed the arch depth/width ratio. The Fijian upper and lower dental arches were significantly larger than those found in other populations and was characte-rized by a wide posterior arch breadth. The Western Samoan and Kiribati arch shape was more similar to the Japanese arch shape than the Fijian. Distribution patterns of arch shape characteristics in these populations showed the same tendencies in the upper and lower arches.
    Download PDF (914K)
  • Kayo Kuyama, Hirotsugu Yamamoto
    1997 Volume 39 Issue 4 Pages 202-210
    Published: 1997
    Released: March 11, 2011
    JOURNALS FREE ACCESS
    In recent years, the use of mouthwash has become widespread as a part of routine oral hygiene. However, there have been no fundamental studies on the influence of mouthwashes on the human oral mucosae. One hundred and twenty-five subjects (50 males and 75 females) were selected for this study. The effects of mouthwash was assessed with the use of exfoliative cytological and cytomorphometric analyses of smears obtained from clinically normal upper labium and cheek mucosae before mouthwashing, 30 s, 10 min and 1 h after mouthwashing. The independent variables examined were oral site, sex and smoking (smokers versus never-smokers). In all subjects and sites, the appearance rate of exfoliated cells stained by light green SFY decreased just after mouthwashing, and the rate after 1 h was lower than that of the untreated controls. The oral mucosae of smokers were more irritated action by mouthwashing than that of the never-smokers. Even after 1 h, decreases in the nuclear and cytoplasmic areas of cells and increases in inflammatory cells were observed. In conclusion, the use of mouthwash was so inflamed the human oral mucosae that more attention should be paid when it is used daily in oral hygiene.
    Download PDF (8172K)
  • Masaaki Terakado, Tamotsu Uehara, Tomiyuki Takigawa, Masahiko Honda, H ...
    1997 Volume 39 Issue 4 Pages 211-215
    Published: 1997
    Released: March 11, 2011
    JOURNALS FREE ACCESS
    We report a 46-year-old woman who presented with a hemangiopericytoma in the buccal mucosa. At the 2-year postoperative examination, there was no evidence of recurrence or metastasis. The findings in the present case are compared with previous reports in the Japanese literature, with regard to patient age and sex, and lesion size, location, malignancy, local recurrence and metastasis.
    Download PDF (2582K)
feedback
Top