THE JOURNAL OF THE STOMATOLOGICAL SOCIETY,JAPAN

[title in Japanese]

[in Japanese]

1982 Volume 49 Issue 3 Pages 407
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.407

JOURNAL FREE ACCESS

Download PDF (216K)
[title in Japanese]

[in Japanese], [in Japanese]

1982 Volume 49 Issue 3 Pages 408
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.408

JOURNAL FREE ACCESS

Download PDF (192K)
[title in Japanese]

[in Japanese]

1982 Volume 49 Issue 3 Pages 409
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.409

JOURNAL FREE ACCESS

Download PDF (255K)
[title in Japanese]

[in Japanese]

1982 Volume 49 Issue 3 Pages 410
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.410

JOURNAL FREE ACCESS

Download PDF (1732K)
[title in Japanese]

[in Japanese]

1982 Volume 49 Issue 3 Pages 411
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.411

JOURNAL FREE ACCESS

Download PDF (184K)
[title in Japanese]

[in Japanese]

1982 Volume 49 Issue 3 Pages 412
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.412

JOURNAL FREE ACCESS

Download PDF (199K)
[title in Japanese]

[in Japanese]

1982 Volume 49 Issue 3 Pages 413
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.413

JOURNAL FREE ACCESS

Download PDF (184K)
Functional Analysis for Orthodontic Diagnosis Through EMG Pattern of Masticatory Muscle and Jaw Movement Pattern

Ryoji Nakamura

1982 Volume 49 Issue 3 Pages 415-442
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.415

JOURNAL FREE ACCESS

Show abstractHide abstract

The purpose of this study is to establish the exact functional analysis used for orthodontic diagnosis. Electromyogram (EMG) of the masticatory muscle and sagital path of habitual jaw movement were recorded simultaneously. The subjects consisted of 25 orthodontic patients (11 subjects with anterior reversed occlusion including Angle Class I or Class III, 14 with upper protrusion including Angle Class I or II). The recording of the EMG and jaw movement of the subjects were analyzed using the functional pattern.
The results obtained are as follows:
1. There 2 types in EMG pattern.
Type I: The activity gradually increased from the beginning of the closing phase to the occlusal phase.
Type II: There was a sudden spurt from the beginning of the closing phase.
2. There were 2 patterns of jaw movement; one that didn't have a large discrepancy between the path of opening and closing (J1), and another which did (J2). The former could by divided into 2 types (Pa), (Jib). The latter also could be done (J2a), (J2b).
3. The jaw movement pattern in EMG pattern Type I corresponded to (Da) or (Jib). That in Type II corresponded to (J2a) or (J2b).
4. EMG pattern and the pattern of jaw movement form were made regardless of the type of malocclusion.
5. The patients with skeletal malocclusion were of the EMG Type I pettern.
6. It became functionally possible to analyze the malocclusion through the EMG pattern of the masticatory muscle and jaw movement pattern.

View full abstract

Download PDF (8549K)
Change with Time of Acid-Etched Enamel Surfaces in the Mouth

Yukimasa Hachiya

1982 Volume 49 Issue 3 Pages 443-451
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.443

JOURNAL FREE ACCESS

Show abstractHide abstract

In order to investigate the change of the acidetched enamel surface with time, the halves of the facial surface of the intraoral and extraoral human teeth were acid-etched and observed by the naked eyes and the SEM after leaving them in the mouth or in the artificial saliva. The findings were as follows:
1. Acid-etching produced microcrevices due to the rod structure on the enamel surfaces without the prismless layer. Even when the surface looked fully covered by the prismless layer, some microcrevices were always found in the discontinuities of the layer.
2. The etched surface gradually loses the chalky appearance showing no microcrevices under the SEM after one month. The microcrevices were, however, disclosed when the organic deposit was removed by cleansing with NaOC1 solution.
3. When the etched surface was stored in the artificial saliva with periodicall brushing, the prominencies were somewhat abraded but the microcrevices did not disappear.

View full abstract

Download PDF (7831K)
Effect of Tannin-Fluorido Preparations on the Vital Teeth Preparation

Especially Effect on the Hypersensitivity of Pulp

Yoshimi Tachibana, Tadashi Takeshita, Haruo Kato, Ayako Kubota, Mitsur ...

1982 Volume 49 Issue 3 Pages 452-457
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.452

JOURNAL FREE ACCESS

Show abstractHide abstract

Tannin-fluoride preparations were applied on to the dentin surface exposed by the preparation of the vital teeth for artificial crowns or inlays and the decrease in the sensibility of the dentin was observed clinically. The results obtained were as follows:
1) In the case of the crown preparation, tannin-fluoride preparations were markedly effective in reducing the dentin hyperesthesia in 50.0% of the cases, effective in 31. 3% and not effective in 18.7%. In the cases of the inlay preparation, the preparations were markedly effective in 57.1% of the cases, effective in 32.8% and not effective in 10.1%.
2) The effect of tannin-fluoride preparations on the hypoesthesia of the dentin was more distinct to the mechanical stimulation than to the thermal stimulation
3) Reapplication of the tannin-fluoride preparations showed a considerable hypoesthetic effect on the non-effective cases of the first application of the mixture.
4) There was no significant difference between the two tannin-fluoride preparations mixed with water and with glycerin.

View full abstract

Download PDF (1229K)
Adhesion of the Subsequently Added Composite Resin

Kazuo Chiba

1982 Volume 49 Issue 3 Pages 458-470
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.458

JOURNAL FREE ACCESS

Show abstractHide abstract

The feasibility and the optimum conditions for the subsequent addition of two types of composite resin were investigated by determining the bond strength under various conditions. The substrates were observed by SEM. The findings were as follows:
1. When the subsequent resin mix was placed on the uncontaminated restoration surface, its bond strength to the surface which had set in contact withthe celluloid matrix or while exposed to air was approximately 300kg/cm² with Clearfil and 250kg/cm² with Adaptic, being much higher than the tooth substance. That to the surface reduced by a finishing carbide bur was of the above figure. Treatment with the etching or bonding agent did not increase the strength.
2. When the subsequent resin mix was placed on the saliva-contaminated restoration surface after spray-washing and drying, the treatment with the bonding agent increased the bond strength. Reducing the surface decreased the strength.
3. The bond strength of the subsequent resin mix to the resin surface stored in saliva for 1 week or 3 months was very low and did not return to its former strength by treatment with the etching or bonding agent. Reduction of this surface resulted in strength values near that of the resin surface reduced immediately after placement without contamination. Treatment whit the bonding agent slightly increased the strength.

View full abstract

Download PDF (7386K)
Topological Distribution of the Masticatory Muscle Spindles in Some Ungulates and the Proprioceptive Significance in Mastication

Shigeru Komatsu

1982 Volume 49 Issue 3 Pages 471-490
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.471

JOURNAL FREE ACCESS

Show abstractHide abstract

Using the heads of the fetuses before parturition of the horses, bovines and pigs, which were collected at an abattoir, this study dealt with the comparison of the muscle differentiation and muscle spindle formation in the masticatory muscles between the three species and with the discussion on the movement mode of the jaw during mastication of the food peculiar to each kind of animal from the point of the distribution pattern of the muscle spindles in the muscle.
The results obtained were as follows: 1. An advanced prenatal growth of the muscle spindles was observed in the masticatory muscles of every specimen examined. This suggests the functional adaptation to the complete ability to suck and masticate after birth. 2. The well-developed masseter and medial pterygoid muscles contained in the bovines 63% of the muscle spimdles, in the pigs 58% and in the horses 55%. This suggests a functional adaptation to mastication of the herbivorous animals by the wide side-to-side swinging movement of the mandible to chew and grind grass. 3. The involuted temporalis muscle contained in the bovines 37% of the muscle spindles, in the pigs 36% and in the horses 39%. This suggests a functional adaptation to the side-to-side swinging movement of the lower jaw by the masseter and pterygoids to stabilize the condyle during the side-to-side grinding movement when masticating. 4. The small zygomaticomandibularis muscle contained 5 to 6% of the muscle spindles in the pigs and horses but no spindles in the bovines. This suggests a functional adaptation to control the side-to-side movement of the condyle during the grinding movement when masticating. 5. The lateral pterygoid muscle contained a few muscle spindles in the bovines and horses but no spindles in the pigs. It suggests some differences among the three species in the muscular contribution to the condylar grinding movement. 6. The jaw-opening muscles had no spindles in the three species.

View full abstract

Download PDF (9747K)
Some Contributions to the Study on the Neurons Innervating Tooth Pulp in Tupaias and Monkeys by HRP Method

Kazutomo Takada

1982 Volume 49 Issue 3 Pages 491-506
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.491

JOURNAL FREE ACCESS

Show abstractHide abstract

In order to obtain further information on tooth pulp innervation in the mammals, the horseradish peroxidase method was applied to the molar tooth pulp in 24 tupaias (common tree shrews) and 10 monkeys (8 Japanese monkey, one Yaku monkey and one crab-eating monkey) .
The tooth pulp of the molars or deciduous molars was exposed to the HRP solution. Twentyfour and/or 48 hours after the injection of HRP into the pulp, the trigeminal ganglia, brain stem and 3 cervical sympathetic ganglia (superior, middle and inferior) were removed. Frozen sections (50 to 70 micron meters thick) were made from each specimen and, after mounting on the slide glass, the DAB and TMB reaction technique was applied to each preparation. Then, the HRPcontaining cells were examined microscopically. The results obtained were as follows: 1) The HRP-containing cells were located sparsely, sometimes in a small cluster, in a given part of the trigeminal ganglion corresponding to the tooth pulp exposed to HRP. 2) The number of HRPcontaining cells in the ganglion correlates nearly to the number of myelinated nerve fibers of the pulp. 3) The HRP-containing cells were labelled abundantly in the three sympathetic ganglia superior, middle andinferior . 4) The number of HRP-containing cells was far larger tha n that of unmyelinated nerve fibers in the tooth pulp exposed to HRP.
From these results, it is clear that the pulpal innervation has a close relation with the innervation of the different areas of the body through the cervical sympathetic ganglia. In other words, from the clinical point of view, it is suggestive that a pulpal dysfunction may cause a dysfunctionary status in the various areas of the body.

View full abstract

Download PDF (8464K)
Responses of Two-cell Mouse Embryos to U. V. -light Irradiation

Hideki Endoh

1982 Volume 49 Issue 3 Pages 507-523
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.507

JOURNAL FREE ACCESS

Show abstractHide abstract

The present study aims to elucidate the radiobiological differences between embryos and somatic cells in mammals. The radiobiological responses of U. V. -irradiated cells are contrasted to those of X-ray-irradiated cells, in terms of 1) cell cycle-dependent radiosensitivity variation, 2) the number of cell divisions of irradiated cells, 3) the delay in progression through G₂ phase. Thus, these three responses of two-cell mouse embryos were analyzed after U. V. -irradiation and compared to those of somatic cells.
The normal two-cell embryos from superovulated 8-week-old mouse B6 D2 F₁ females were collected into phosphate-buffered saline and irradiated with various fluences of U. V. during the cell cycle. After irradiation, the embryos were culutured for a few hours to 3 days and analyzed for their radiobiological responses. The results are as follows: 1) The embryos were the most U. V. -resistant in S phase and the most U. V. -sensitive in late G₂ and M phase. 2) Several cleavage divisions occurred in the dead embryos. 3) The embryos showed a delay in their progression through G₂ phase.
Thus, the responses of X-ray and U. V. -irradiated mouse embryos are rather parallel, which are contrary to those of somatic cells. We conclude that the risk on human embryos by diagnostic X-ray examination cannot be estimated from the study on somatic cells.

View full abstract

Download PDF (4343K)
Oral Manifestations of Leukemia

Minoru Takagi, Goro Ishikawa

1982 Volume 49 Issue 3 Pages 524-534
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.524

JOURNAL FREE ACCESS

Show abstractHide abstract

The oral manifestations of leukemia were studied on a total of 148 autopsy cases. The case materials were obtained from the Department of Pathology, Tokoy Medical and Dental University. The cases were subclassified into acute myelogenous leukemia (AML, 47 cases), acute promyelocytic leukemia (AProL, 14 cases), acute monocytic leukemia (AMoL, 11 cases), acute lymphatic leukemia (ALL, 10 cases), chronic myelogenous leukemia (CML, 17 cases), acute leukemia (AL, 24 cases) and erythroleukemia (EL, 5 cases) . The results were as follows:
1. Gingival bleeding from the oral mucosa and the gingival swelling were frequently the initial symptoms of AML, AProL and AMoL. Twelve patients with AML (26%), seven with AProL (44%) and two with AMoL (18%) consulted the dentist first.
2. The other oral manifestations were oral ulcer, stomatitis, osteitis and disturbances of the cranial nerves.
3. Almost all patients with AProL had gingival bleeding and bleeding from the oral mucosa.
4. The patients with AMoL had gingival swelling more frequently than gingival bleeding, occasionally accompanied by a necrotizing lesion.
5. The patients with ALL, CML and AL showed oral symptoms only at times. 6. The gingival bleeding or bleeding from the oral mucosa occurred as a symptom of systemic hemorrhagic tendency. The presence of marginal periodontitis accelerated gingival bleeding. The gingival swelling, which was especially seen in AMoL, was caused mainly by leukemia cell infiltration. However, only the non-specific margial periodontitis was seen in some patients. The oral ulcer might be due to oral infection, sometimes caused by fungus. The inflammatory cell infiltration was seen occasionally.

View full abstract

Download PDF (7616K)
Primary Carcinoma of the Sphenoid Sinus-Report of an Autopsy Case-

Minoru Takagi, Goro Ishikawa, Hideo Hiratsuka

1982 Volume 49 Issue 3 Pages 535-538
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.535

JOURNAL FREE ACCESS

Download PDF (1539K)
Application of Fluoride-releasing Polymers as Dental Materials

Yoshinori Kadoma, Eiichi Masuhara

1982 Volume 49 Issue 3 Pages 539-546
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.539

JOURNAL FREE ACCESS

Download PDF (1888K)
[title in Japanese]

[in Japanese], [in Japanese]

1982 Volume 49 Issue 3 Pages 547
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.547

JOURNAL FREE ACCESS

Download PDF (247K)
[title in Japanese]

[in Japanese], [in Japanese]

1982 Volume 49 Issue 3 Pages 548
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.548

JOURNAL FREE ACCESS

Download PDF (1970K)
[title in Japanese]

[in Japanese]

1982 Volume 49 Issue 3 Pages 549
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.549

JOURNAL FREE ACCESS

Download PDF (658K)
[title in Japanese]

[in Japanese]

1982 Volume 49 Issue 3 Pages 550
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.550

JOURNAL FREE ACCESS

Download PDF (211K)
[title in Japanese]

[in Japanese]

1982 Volume 49 Issue 3 Pages 551
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.551

JOURNAL FREE ACCESS

Download PDF (202K)
[title in Japanese]

[in Japanese], [in Japanese]

1982 Volume 49 Issue 3 Pages 552
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.552

JOURNAL FREE ACCESS

Download PDF (242K)
[title in Japanese]

[in Japanese]

1982 Volume 49 Issue 3 Pages 553
Published: 1982
Released on J-STAGE: October 27, 2010

DOIhttps://doi.org/10.5357/koubyou.49.553

JOURNAL FREE ACCESS

Download PDF (240K)

Register with J-STAGE for free!