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Volume 27 (1989)
- Issue 4 Pages 821-
- Issue 3 Pages 587-
- Issue 2 Pages 313-
- Issue 1 Pages 1-
Volume 27, Issue 3
Displaying 1-17 of 17 articles from this issue
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Yukio Machida1989 Volume 27 Issue 3 Pages 587-594
Published: September 25, 1989
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThis paper is a description of the growth and development of the alveolar ridge after extraction of deciduous teeth for the purpose of handling the appliance for denture guidance and its clinical application.
The regions observed were regions of the maxillary and mandibular deciduous molars and maxillary deciduous incisors, frequently causing premature loss of deciduous teeth.
Changes of the alveolar ridge width after extraction in all regions can be divided into the following three phases; decreasing, stable, increasing. The decreasing phase finished about four months after the extraction. The increasing phase began from about eight months prior to the emergence of the succedaneous teeth.View full abstractDownload PDF (9009K) -
Shinichi Ikuno1989 Volume 27 Issue 3 Pages 595-606
Published: September 25, 1989
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe purpose of this study was to identify and to characterize the peripheral movement evoked by electrical stimulation given to the masticatory area of the cerebral cortex (Control group), and to clarify the development of the chewing center by examining the change in the peripheral movement when the tooth germs have been enucleated (Enucleation group). Puppies were used in the present study which were anesthetized with a 25% solution of Urethane (4 ml/kg, i. p. ). Their heads were then, fixed in a stereotaxic apparatus, and the surfaces of the orbital gyrus was surgically exposed. Electrical stimulation (Frequency: 25 c/sec, Duration: 2 msec) was given to the masticatory area. All of the tooth germs of the deciduous teeth were enucleated at 12-14 days of age in the enucleation group. After the enucleated wound healed, stimulation was similarly performed in the control.View full abstractDownload PDF (3120K) -
Mitsuro Tanaka, Keiko Kobayashi, Fujiko Okumura, Hiroshi Ono, Yoshinor ...1989 Volume 27 Issue 3 Pages 607-611
Published: September 25, 1989
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThere are many reports concerning the recovery phenomenon of acid-etched enamel surfaces of teeth. Many studies of surface hardness, acid resistant properties, radiolucency, and surface morphology suggest that orally the acid-etched enamel reverts to a state nearly similar to that of the intact enamel before the acid etching. This study was conducted in order to verify the existence of the recovery phenomenon of fluoride on acid-etched enamel, because the surface layer of a high fluoride concentration is removed from the surface enamel by the acid etching.View full abstractDownload PDF (982K) -
(III) A Study of the Etching TimesYumiko Hosoya, George Goto1989 Volume 27 Issue 3 Pages 612-620
Published: September 25, 1989
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe purpose of this study was to investigate the influence of etching times for the effect of acid etching on the primary enamel smooth surfaces.
Fifty labial surfaces of the extracted or exfoliated caries-free primary anterior teeth were used.
The cleaning and polishing pretreatment used in this study was polishing with a brush cone (Howe-Neos-Dental Co. ) with water at a low speed (600-6000 r. p. m. ).
The etchant used in this study was 40% phospholic acid gel and the etching times were 10,30,60,90 and 120 seconds. All specimens were washed with an air water spray for 30 seconds after etching.View full abstractDownload PDF (12549K) -
Part 1 Role of Prostaglandins as a Chemical Mediator on Resorption of Deciduous Teeth in RabbitsKenji Arita, Kuniko Kato, Tae Tojo, Mizuho Nishino1989 Volume 27 Issue 3 Pages 621-628
Published: September 25, 1989
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe aim of this study was to investigate the effects in the administration of indomethacin which is a specific inhibitor of prostaglandins (PGs) in order to understand the role of PGs in physiologic root resorption. For this study,24 young rabbits aged 7 days which had been in utero for 31-32 days were used. The experimental group (N=12) was injected with 5.0 mg/kg indomethacin every 12 h, and the control group (N =12) was injected with normal saline solution every 12 h.4 animals of each group were sacrificed at the 9th,11th and 13th day, respectively. Their maxillary deciduous incisors embedded in paraffin were sectioned serially 7μ in thickness. From each sample was counted the number of odontoclasts appearing on the root surface and measured the volume of the root in the maxillary deciduous incisor.View full abstractDownload PDF (4824K) -
Part 2 Dose-Response Effects of Indomethacin on Resorption of Deciduous Teeth in RabbitsKenji Arita, Noriko Abe, Akiko Kinouchi, Kuniko Kato, Mizuho Nishino1989 Volume 27 Issue 3 Pages 629-636
Published: September 25, 1989
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe aim of the present study was to confirm whether prostaglandin (PGs) had any connection with physiological root resorption.
16 young rabbits aged 7 days which had been in utero for 32 days were used and were divided into 4 groups. The control group was injected with normal saline solution, and the experimental groups were injected with indomethacin, a specific inhibitor of PGs synthetase, in doses of 0.1 mg/kg,1.0 mg/kg,10.0 mg/kg every 12 hours for 5 days, respectively. All animals were sacrified at 11 days postnatal. Their maxillary deciduous incisors were embedded in paraffin and sectioned serially in 7μ thickness. The number of odontoclasts appearing on the root surface were counted, and the volume of the maxillary deciduous incisor was measured.View full abstractDownload PDF (3782K) -
Part I: Relationship between mothers' behavior and child patients' factorsOsamu Fukuta, Hiromi Maruyama, Yoshiko Suzuki, Hiroshi Yanase, Nobuko ...1989 Volume 27 Issue 3 Pages 637-644
Published: September 25, 1989
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe purpose of this study was to find out factors which determine whether or not mothers of handicapped children chose to be with their children while receiving dental care. The subjects were 46 pairs consisting of a handicapped child and his or her mother who came to the pedodontic clinic of Aichi-Gakuin University Dental School.
Such factors of the patients as the various abilities of the patients, their behavior and other items were surveyed with a behavior evaluation. These factors are considered to be related to determining the behavior of the mothers.View full abstractDownload PDF (1576K) -
1. Prevalence of dental cariesHiroko Kuboyama, Kaori Ishii, Masao Ozaki, Mieko Tanaka, Keiko Onoue, ...1989 Volume 27 Issue 3 Pages 645-653
Published: September 25, 1989
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSAn epidemiological investigation on dental caries was undertaken with 810children of nursery school, kindergarten, elementary and junior high school age in the town of Fuji, saga prefecture which is a mountain village with less movement of the population. From this investigation the following results were obtained regarding the dental caries prevalence and the status of treatment:View full abstractDownload PDF (1703K) -
Masahito Nakashima, Hiroshi Nobuke, Yujiro Miyake, Masahiko Sunada, No ...1989 Volume 27 Issue 3 Pages 654-662
Published: September 25, 1989
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe purpose of this investigation was to evaluate direct pulp capping in primary teeth with calcium hydroxide agents. All utilized datas were selected from all the charts of the 3,675 patients at Pediatric Dentistry clinic of the School of Dentistry, Hiroshima University.View full abstractDownload PDF (2086K) -
Keiko Harada, Kenji Arita, Mizuho Nishino1989 Volume 27 Issue 3 Pages 663-671
Published: September 25, 1989
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSIn the permanent tooth, physiological root resorption does not occur, but inflammatory resorption occurs due to the orthodontic force, ectopic eruption of neighboring tooth and others. In this study, the morphological and histological investigation of the root resorption of the upper permanent incisors caused by the ectopic eruption of the canine was carried out. The left central incisor and lateral incisor from a 12year-old female were examined. The roots were resorbed almost completely, and in part the resorption extended into the enamel.View full abstractDownload PDF (20403K) -
Mieko Tanaka, Wataru Motokawa, Hiroaki Hayashida, Takamitsu Ogami, Yut ...1989 Volume 27 Issue 3 Pages 672-677
Published: September 25, 1989
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSA case is presented of a six-year-six-month-old boy with three impacted supernumerary teeth in the premaxillary region. The radiographic examination showed one mesiodens resorbing the root of the left primary central incisor and two inverted supernumerary teeth, also displacement of the unerupted permanent central incisors. Surgical treatment was performed to remove these supernumerary teeth.
The forms of the mesiodens exhibited tubercularly shaped crown with fourconical cusp and two inverted supernumerary teeth showed a conicalshaped crown with incomplete root.
According to the family history, a sibling had a supernumerary tooth in the same region which had been extracted in the past.View full abstractDownload PDF (6662K) -
Hiromi Takeuchi, Hiroko Hioki, Yuuka Ishikura, Mieko Tomizawa, Tadashi ...1989 Volume 27 Issue 3 Pages 678-691
Published: September 25, 1989
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSIdiopathic hypoparathyroidism is characterized by a deficiency of the parathyroid hormon, origin unknown, and causes a low serum calcium and a high serum inorganic phosphorus. This report concerns a clinical observation of a case of idiopathic hypoparathyroidism.
This case was examined from the dental point of view.View full abstractDownload PDF (24598K) -
Keiko Harada, Kenji Arita, Mizuho Nishino1989 Volume 27 Issue 3 Pages 692-699
Published: September 25, 1989
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSA 12-year-old female with severe root resorption in the maxillary left central and lateral incisors (Case 1) and a 27-years-old female with the maxillary left canine erupted in the position of the central incisor (Case 2) were examined and treated.View full abstractDownload PDF (13673K) -
Szu-Yu Hsiao, Tadashi Fukao, Masatoshi Koro, Yoshiyuki Funakoshi, Toyo ...1989 Volume 27 Issue 3 Pages 700-707
Published: September 25, 1989
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSPrader-Willi syndrome is characterized by hypotonia, hypomentia, hypogonadism and obesity. A case of a 10-year-5-month-old girl who was diagnosed to have the typical symptoms associated with the Prader-Willi syndrome is described in the present report.
The following are the dental findings.
1) Enamel hypoplasia, crowding over the anterior teeth and narrow dental arch were found. However there was no high palate in the maxilla.
2) The mesio-distal width of the present teeth were small compared with the national average.
3) According to X-ray cephalometric analysis, a retardation of the growth of the maxilla and mandible was found.
4) Because of hypomentia and the difficult management of the patient, dental treatment was performed under general anesthesia.View full abstractDownload PDF (8692K) -
-Part I: On Carious Dentitions, Anomalies of Occlusion and Ways of Eating-Noboru Takanashi, Ken-ichi Naya, Makio Masumori, Junzaburo Nakano, Aya ...1989 Volume 27 Issue 3 Pages 708-715
Published: September 25, 1989
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSIn September,1987, a survey on the nutrition of infants was conducted with 1,235 children from 3 to 6 years of age selected from six nurseries and six kindergartens in the metropolis of Tokyo. We compared the survey results with other similar survey reports with respect to three areas; 1, caries attack on primary teeth,2, anomalies of dentition and occlusion and 3, how foods are eaten, to observe the difference by age and also between children in nurseries and in kindergartens.View full abstractDownload PDF (1503K) -
Ryosuke Ishida, Yoshiaki Yasufuku, Atsuko Miyamoto, Takashi Ooshima, S ...1989 Volume 27 Issue 3 Pages 716-724
Published: September 25, 1989
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSThe caries incidence was clinically examined in 119 children with cleft lip and palate (CLP; 65 male and 54 female; 2 to 14 years of age). At the lower age, the CLP children had more dental caries in the upper teeth than normal children, and, the caries prevalence became higher, with the increase in the age. In both primary and permanent dentitions, the CLP children showed an extremely high caries incidence in the upper anterior teeth, which was related to the presence of cleft. The characteristic oral structures of CLP patients; such as abnormalities of tooth position and axis, the presence of scars, and the absence of vestibular oris, increased the area on the tooth surfaces which afforded the protection from the self-cleaning activity in the mouth, and consequently induced high caries prevalence.
These results indicated that it is necessary for the children with CLP to be instructed in oral hygiene procedures as soon as the primary tooth erupts.View full abstractDownload PDF (9985K) -
1989 Volume 27 Issue 3 Pages 725-817
Published: September 25, 1989
Released on J-STAGE: January 18, 2013
JOURNAL FREE ACCESSDownload PDF (27555K)
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