著者

和田 邦子

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.59, no.2, pp.518-540, 1992 (Released:2010-10-27)

参考文献数

31

被引用文献数

3 2

---

The purpose of this research was to evaluate the clinical acceptability of various impression thechniques by comparing the dimensional accuracy of their working casts. An original metallic model was designed for this experiment. It has reference points to overlap and compare the master model and the working casts for measuring their dimensional accuracy under the same condition. The amount of distortion in each area of the working casts was examined by the measuring points within the model. The master model simulated an abutment for a full veneer crown with undercuts between the adjacent teeth. It was planned so that the amount of undercuts and distances between the adjacent teeth could be changed. As a result, a small distortion of the working casts due to the undercuts was observed by the technique using an individual tooth tray and polysulfide rubber base impression material. There was no significant dimensional change in the working casts made with silicone rubber base material. For the working casts made by hydrocolloid-alginate combination technique, the dimensional change was greater and distortion was observed in the abutment cast when the undercuts of the adjacent teeth were great. However, the distortion was less when the undercuts were small.

著者

布施 貞夫 松田 登 松井 忠男

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.25, no.4, pp.644-646_1, 1958 (Released:2010-10-08)

参考文献数

16

著者

吉野 敏明

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.63, no.1, pp.70-87, 1996-03-31 (Released:2010-10-08)

参考文献数

35

被引用文献数

2 1

---

The investigation of the physiological response of masticatory muscle which is associated with the perception of the mandibular lateral deviation is clinically important. Therefore, the effects of various lateral mandibular deviation on the masseter muscle function were investigated on five healthy subjects. The mandibular position was deviated 0.5, 1.0, 1.5, 2.0 and 3.0 mm to the right and left from a reference position corresponding to the rest position. The mandible was passively retained in each test position by means of a bite block. Electromyographic activity (background activity) was recorded with bipolar surface electrodes applied to the right and left masseter muscles. Jaw-jerk reflex was evoked by a reflex hammer, and motoneuron activity was indirectly examined.The background activity as well as the amplitude of the jaw-jerk reflex on the mediotrusive side mainly increased in proportion to the mandibular deviation. However, most subjects showed no significant change about 3 mm from the reference position in the background activity and about 2 mm in the range of muscle activity evoked by the jaw-jerk reflex. These results suggested that the masseter jaw-jerk reflex may assist clinical examination of small mandibular deviations.

著者

田中 晟策

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.28, no.1, pp.14-19, 1961 (Released:2010-10-08)

参考文献数

30

被引用文献数

1 1

著者

植松 宏

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.66, no.2, pp.165-169, 1999-06-30 (Released:2010-10-08)

参考文献数

11

著者

平田 康 木野 孔司 長岡 俊哉 宮本 亮三 吉増 秀實 天笠 光雄

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.68, no.3, pp.249-253, 2001-09-30 (Released:2010-10-08)

参考文献数

10

被引用文献数

19 20

---

Oro-maxillary sinus perforation occurs occasionally at the extraction of a maxillary tooth, and it may be a cause of maxillary sinusitis or antro-oral fistula. Our purpose was to investigate the most frequent site of perforation, and to understand the clinical course of patients after perforation.We examined 2, 038 maxillary teeth extracted from 1, 337 patients (473 males and 864 females) at the First Department of Oral and Maxillofacial Surgery, Tokyo Medical and Dental University, from January 1991 to December 1993.Perforation occurred in 77 of all 2, 038 teeth (3.8%) . Of these, 38 teeth were from males (38/733 ; 5.2%), and 39 were from females (39/1, 305 ; 3.0%) . The perforation rate was significantly higher in males.Perforation occurred most often with extraction of an upper first molar, and in the third decade of life. The perforation rate gradually decreased with higher age.We classified 38 cases into 3 categories according to panorama X-P : 1) The tip of the root crossed over the bottom line of the maxillary sinus (29 cases), 2) Not crossed over distinctly (4 cases), 3) Just lie on, or whether the tip of the root crossed over the bottom line of the maxillary sinus was not distinct (5 cases) .As to treatment, 30 perforations (39.0%) closed spontaneously in the course of observation, irrigation with physiological saline was used in 43 cases (55.8%), radical sinusotomy accompanied by closure of the perforation was performed in 4 cases, and only flap closure was used in 7 cases. There were no cases of relapse.

著者

奥瀬 孝一

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.31, no.4, pp.187-200, 1964 (Released:2010-10-27)

参考文献数

59

被引用文献数

6 3

著者

小野 博志

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.63, no.3, pp.448-458, 1996-09-30 (Released:2010-10-08)

参考文献数

21

被引用文献数

2 1

著者

豊福 明

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.74, no.3, pp.161-168, 2007-10-31

参考文献数

59

被引用文献数

3 1

著者

永田 尚弘

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.35, no.3, pp.441-448, 1968 (Released:2010-10-08)

参考文献数

21

被引用文献数

2 2

著者

土田 信夫

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.52, no.4, pp.607-616, 1985 (Released:2010-10-27)

参考文献数

38

著者

上野 俊明

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.62, no.2, pp.212-253, 1995-06-30 (Released:2010-12-08)

参考文献数

181

被引用文献数

7 6

---

To investigate the relationship between teeth clenching in Intercuspal position and isometric shoulder adduction movement in 12 normal subjects, the muscle strength and electromyogram (EMG) of the seven muscles concerned were measured by using Cybex 6000 Extremity Testing and Rehabilitation System and surface EMG analyzing system. Normalized peak torque (n-PT) and normalized average torque (n-AT) were analyzed to find muscle strength. Normalized integrated EMG (n-iEMG) was analyzed to find muscle activity.The results were as follows :1. For n-AT, the value in 100 %MVC significantly increased by 5.4% as compared with that in the rest position (RP) .2. There was a significant positive correlation between biting force of intercuspal position (ICP), 20%MVC, 50%MVC and 100%MVC and muscle strength of n-PT and n-AT.3. For n-iEMG, the value of latissimus dorsi, teres major, triceps brachii and forearm extensor muscles in 100%MVC significantly increased by 8.4%, 13.0%, 9.3% and 18.9% respectively as compared with that in RP.4. There was a significant positive correlation between biting force of intercuspal position (ICP), 20%MVC, 50%MVC and 100%MVC and muscle activity of pectralis major, latissimus dorsi, teres major, biceps brachii, triceps brachii, forearm extensor and forearm flexor muscles.

著者

三浦 維四 桜井 実

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.23, no.2, pp.136-142, 1956

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In dental practice, whether brazing is easy or not is important. A brazing process for titanium in air was studied using town-gas as a heat-source.<BR>Due to the gas-active properties of titanium, it seems to be necessary to braze it at a low temperature.<BR>The alloys and the fluxes for low temperature brazing were studied by us and it was found that some alloys in Table 1 and 2, and fluxes in Fig, 3-7 were satisfactory for this purpose.

著者

鈴木 長明

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.68, no.1, pp.1-7, 2001-03-31 (Released:2010-10-08)

参考文献数

33

著者

大森 郁朗 川瀬 美知子

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.29, no.3, pp.140-147, 1962 (Released:2010-10-08)

参考文献数

16

被引用文献数

13

著者

加藤 〓

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.35, no.1, pp.58-81, 1968 (Released:2010-10-08)

参考文献数

54

被引用文献数

11 4

著者

三浦 康次郎 木野 孔司 渋谷 寿久 平田 康 渋谷 智明 佐々木 英一郎 小宮山 高之 吉増 秀實 天笠 光雄

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.65, no.1, pp.1-5, 1998-03-31 (Released:2010-10-08)

参考文献数

18

被引用文献数

10 8

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This paper described the incidence of inferior alveolar nerve paralysis following surgical removal of impacted third molars. The investigated cases were 789 patients with 1, 299 teeth that were surgically extracted. Eight (0.6%) patients had the inferior alveolar nerve paralysis and one (0.08%) had lingual nerve paralysis. As for the patients with inferior alveolar nerve paralysis, the incidence was 0.4% in those aged 20 to 29 years, 0.6% in those aged 30 to 39 years, and 3.5% in those aged over 40 years. This study showed that the incidence of inferior alveolar nerve paralysis occurred more frequently in older age cases and in the cases in which the root splitting or the removing the surrounding bone was needed.

著者

菅原 規子

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.67, no.3, pp.251-263, 2000-09-30 (Released:2010-10-08)

参考文献数

19

被引用文献数

1

---

The purpose of this study is to clarify the occlusal contact mode between the upper and lower molars on the working side of group function occlusion during lateral excursion.After the intercuspal position (IP) and two lateral positions (Ll, the middle point between IP and L2 ; L2, the edge-to-edge occlusal position of the molars) on the Gothic arch were defined, occlusal contactrelations in these three occlusal positions were recorded, using black silicone. Digital data of real occlusal contacts and visualized data of close (less than 3opm) occlusal areas, by computer image processing, were analyzed.The conclusions are as follows1. Although the numbers of real occlusal contacts and the visualized occlusal area tend to decrease toward L2 during lateral excursion, the former, in some cases, goes up and down.2. Functional cusps play an important part in occlusal contact at the intercuspal position.3. Occlusal contact points are on the functional cusps of the upper and lower molars, which can be clinically regarded as certain points, and these points slide on the inclining non-functional cusps of antagonistic teeth during lateral excursion.4. Each upper and lower molar has 2 to 6 occlusal contact points near the top functional cusps at the intercuspal position, and some of them contact continuously during lateral excursion.

著者

山本 肇 鈴木 進

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.24, no.1, pp.72-76, 1957 (Released:2010-10-08)

参考文献数

23

---

Recently the anthors experienced two autopsy cases of the suspected lead poisoning and decided it's diagnosis by demonstration of clear lead line at hard tissues, especially dentin. The other findings of the oral tissues were gingivitis ulcerosa and lead line about 1 mm wide at the labial gingiva of the lower incisor and buccal gingiva of the upper left second premolar and first molar in the first case and slight gingivitis in the second case. Moreover in polarogram, the anthors proved existence of lead at the liver of the first case and at the liver, bone and brain of the second case.

著者

高田 典孝

出版者

口腔病学会

雑誌

口腔病学会雑誌 (ISSN:03009149)

巻号頁・発行日

vol.65, no.1, pp.64-73, 1998-03-31 (Released:2010-10-08)

参考文献数

38

被引用文献数

6 3

---

Modulation of the tibialis anterior (T.A.) H reflex and the reciprocal Ia inhibition from the ankle flexor to the extensor were studied during voluntary teeth-clenching in 7 healthy adult volunteers to investigate the correlation between the oral motor activity and the somatic motor function.The TA. H reflex was significantly facilitated during voluntary teeth-clenching, and the amount of this facilitation increased with the level of masseter EMG activity. Furthermore, the reciprocal Ia inhibition of the soleus H reflex, induced by stimulation of the common peroneal nerve at a subthreshold intensity for evoking the T.A.M wave, was significantly depressed during voluntary teeth-clenching.It was concluded that 1) the TA. H reflex is facilitated during voluntary teeth-clenching, 2) there is a positive correlation between the amount of facilitation of the TA. H reflex and the level of teeth-clenching force, and 3) the reciprocal Ia inhibition of the crural muscle is reduced during voluntary teeth- clenching. It was suggested that teethclenching contributes to stability of body stance by increasing the stiffness of the ankle joint.