• Journal of Oral Medicine and Pain
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• v.18 no.2
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• pp.43-53
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• 1993

The aim of this study was to investigate the relationship between the presence or absence of anterior tooth contact and the changes in temporomandibular joint space. The study sample consisted of 32symptom-free dental students and 79 craniomandibular disorders patients with unilateral joint dysfunction. The two groups were categorized into control group or experimental group, respectively. Recordings of the number and distribution of occlusal contacts were made by T-Scan system. Transcranial radiographs were taken with using of accurad-100 head positioner. Measured items in transcranial radiographs were anterior, superior, posterior joint space and relative condylar position to deepest position of glenoid folla. According to the presence or absence of anterior tooth contact, each group was subdivided and compared with each other with respect to TM joint space. Data were processed and tested with SPSS/PC + package. The results of the study showed that the joint space in control group were wider than those of experimental group and the difference of the width of joint space was more remarkable in subjects with anterior contact between control group and experimental group. However, in same group whether the presence of anterior tooth contact could hardly affect the difference of the width of joint space. And anterior tooth contact in grouip are more frequent than in experimental group.

• Journal of Oral Medicine and Pain
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• v.18 no.2
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• pp.107-119
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• 1993

저자는 다양한 저작방법에 따른 전측두근과 교근의 좌우균형성을 규명하기 위하여 정상 성인 27명을 대상으로 습관성 저작시, 양측 규칙 저작시, 우측 규칙 저작시 및 좌측 규칙 저작시에 근활성도와 근전도 power spectrum을 컴퓨터를 이용한 근전도 시스템을 이용하여 분석한 결과 다음과 같은 결론을 얻었다. 1. 습관성 저작시 우측 전측두근 및 교근 모두 좌측에 비하여 높은 근활성도를 보였다. (p<0.05). 2. 양측 규칙 저작시 우측 교근은 좌측에 비하여 높은 근활성도를 보였으나 (p<0.05), 전측두근에서는 좌우측 근활성도의 유의한 차이가 없었다. 3. 우측 규칙 저작시 우측 전측두근 및 교근 모두 좌측에 비하여 높은 근활성도를 보였다. (p<0.05) 4. 좌측 규칙 저작시 좌측 교근은 우측에 비하여 높은 근활성도를 보였으나 (p<0.05), 전측두근에서는 좌우측 근활성도의 유의한 차이가 없었다. 5. 저작시 전측두근고 교근의 중간주파수 경사도는 좌우측에서 유의한 차이가 없었다.

• Journal of Oral Medicine and Pain
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• v.18 no.2
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• pp.131-147
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• 1993

To evaluate the contribution of head/neck posture to signs/symptoms of craniomandibular disorder(CMD), the author clinically, cephalo-metrically, analyzed craniomandibular index (CMI), clinical dysfunction index(CDI), occlusal index(OI) and head posture, cervical spine, cervicovertebral anatomy, craniofacial variables from 30 CMD patients and control. And the author analyzed difference between patients and control, and the correlation between CMI, CDI and head posture, cervical spine, cervicovertebral anatomy, craniofacial variables in CMD patients and control. The obtained results were as follows : 1. There was very high significant correlation between CMI and CDI(r=0.8969, p<0.01). 2. There was significant difference between patients and control in head/neck posture, head/neck anatomy(p<0.05). 3. There was significant correlation between CMI, CDI and head posture, cervical spine, cervicovertebral anatomy, craniofacial variables(p<0.05). 4. There was more significant correlation between DI and head/neck posture, head/neck anatomy than between PI and head/neck posture, head/neck anatomy in CMD patients(p<0.05)

• Journal of Oral Medicine and Pain
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• v.13 no.1
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• pp.71-84
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• 1988

The author examined 206 temporomandibular disorders patients, who visited department of Oral Diagnosis and Oral Medicine in Seoul National University Hospital during the period from May 1st 1987 to April 30th 1988, clinically and radiologically and with prepared questionnaire. By clinical and radiological examination, the patients were divided into 2 groups(the patients with temporomandibular joint internal derangement and myofacial pain dysfunction syndrome or with myofacial pain dysfunction syndrome: the patient with temporomandibular joint internal derangement only). The symptom severity index and contributing factors were examined with the questionnaire, and differences in 2 groups were studied. The conclusions are followings : 1. The symptom severity index presenting the severity of symptom was higher and the scope of symptom was wider in the patients with temporomandibular joint internal derangement and myofacial pain dysfunction syndrome or with myofacial pain dysfunction compared to the patients with temporomandibular joint internal derangement only. 2. Emotions, behaviors, cognitions, and social factors were more undesirable in the patients with temporomandibular joint internal derangement and myofacial pain dysfunction syndrome or with myofacial pain dysfunction syndrome than the patients with temporomandibular joint internal derangement only.

• Journal of Oral Medicine and Pain
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• v.13 no.1
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• pp.85-93
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• 1988

The author studied maximum clenching EMG activities of temporalis anterior and masseter muscle during canine guidance and centric occlusion. It was performed before and after anesthesia of maxillary and mandibular canines. The 22 normal subjects (15 males and 7 females) who had healthy maxillary and mandibular canines were selected. Their occlusal contact scheme was canine guidance during movement and they did not have temporomandibular disorder. The results were as follows : 1. The maximum clenching EMG activities of temporalis anterior and masseter muscle during guidance were less than those during centric occlusion. 2. After left maxillary and mandibular canines were anesthetized with 2% lidocanine with 1:100,000 epinephrine, the maximum clenching EMG acivities of temporalis anterior and masseter muscle during left canine guidance were greater than those before anesthesia of left maxillary and mandibular canines(p<0.01) 3. The maximum clenching EMG activities of temporalis anterior and masseter muscle during right guidance were not significantly different between before and after anesthesia of left maxillary and mandibular canines(p>0.05).

• Journal of Oral Medicine and Pain
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• v.14 no.1
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• pp.19-24
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• 1989

The purpose of this study was to investigate the reliability of electromyographic examination in a day and detect the objective measurement timing of electromyography. 18 normal students who were in dental collage of C national university were selected for this study. They had no symptoms on temporomandibular joint area, no restorations and missing tooth on dentition. Their molar relationship was normal or class I of Angle's classification. Electromyography had been taken every one hour from 9:00 A.M. to 5:00 P.M. in the state of clenching and rest by using Bioelectric processor EM2 interfaced with mandibular kinesiograph K-6 diagnostic system. We compared and analyzed the variances of electromyography values of each subjects. The obtained results were as follows : There were no significant differences on variability of electromyography values in each state clenching and rest. In the aspect of this circumstances, the use of electromyography could be a good objective procedure to diagnose the temporomandibular disorders and to detect the effect to the treatment of temporomandibular disorders at any time in a day from 9:00 A.M. to 5:00 P.M.

• Journal of Oral Medicine and Pain
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• v.25 no.1
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• pp.109-116
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• 2000

구강안면 동통중 가장 대표적인 측두하악장애를 치료하는데 있어 전기침 자극요법이 갖는 임상적 치료효과를 평가하기 위하여 측두하악장애 환자군을 환자에 대한 교육 및 온습포를 시행하는 자가치료 환자군, 전기침 자극요법을 시행하는 전기침 자극 환자군, 교합안정장치를 장착하는 구강내 장치장착 환자군, 총 3군으로 구분하였다. 이들 환자군에서 치료전과 치료 1주후 및 1개월 후에 visual analogue scale을 이용한 동통의 정도와 두경부의 근육촉진지수, 하악의 기능이상지수 및 저작근들의 압력통각역치를 측정하여 다음과 같은 결과를 얻었다. 1. 자가치료 환자군의 1주일 치료후 동통정도, 근육촉진지수 및 기능이상지수가 유의하게 감소되었다. 2. 전기침 자극환자군은 1주일 치료후 동통의 정도가 유의하게 감소하였으면 1개월 치료 후 동통의 정도와 근육촉진지수가 유의하게 감소되었다. 3. 구강내 장치장착환자군은 1주일 치료 후 동통의 정도가 유의하게 감소하고 심부교근의 압력통각역치가 유의하게 감소하였고 심부교근의 압력통각역치가 유의하게 증가되었다.

• Journal of Oral Medicine and Pain
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• v.19 no.2
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• pp.205-219
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• 1994

Cigarette butts from 5 smokers were gathered and then, placed in room temperature for 1, 3, 5, 7, 15 days. The possible use of the cigarette butts for individual identification was evaluated in sex determination, amplification of D1S80 locus, polymorphisms of HLA-DQA1 gene from the extracted DNA. 1. DNA extraction was possible in cigarette butts weree left in room temperature for 15days, so it can be applicatable to individual identification by polymerase chain reaction(PCR). 2. Amplification of X-Y homologous amelogenin gene by PCR made it possible to identify the sex in saliva stains (cigarette butts). 3. Amplification of D1S80 locus can be acquired from adding the boving serum albumin and hot start PCR procedures from forensic samples such as saliva stains (cigarette butts), so the AMP-FLPs examining is possible. 4. Genotype could be determined simply and rapidly using Amplitype$TM$ HLA-DQ$\alpha$ forensic kit in examining the HLA-DQA1 gene. From the investigation, DNA extraction, sex determination, amplification of D1S80 locus, polymorphisms of HLA-DQA1 gene was successfully done even though the cigarette butts were left for 15 days at room temperature. Therefore cigarette butts are highly reliable and applicatable as molecular biologic samples for individual identification.

• Journal of Oral Medicine and Pain
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• v.19 no.2
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• pp.99-110
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• 1994

저자는 저작 수준의 등척성 수축시 하악 폐구근에서의 근전도 스펙트럼의 특성을 규명하기 위하여, 정상 성인 25명을 대상으로 최대수의적 수축의 40% 수준으로 근활성을 2분간 유지하게 하고, 이때 전측두근과 교근에서 얻어진 근전기 신호를 컴퓨터를 이용한 근전도 시스템을 이용하여 분석한 결과 다음과 같은 결론을 얻었다. 1. 저작 수준의 등척성 수축 지속시 시작과 마지막 구간 모두에서 전측두근과 교근의 평균중간주파수와 중간주파수 기울기는 성별 및 연령의 영향을 받지 않았다. 2. 저작 수준의 등척성 수축 지속시 시작과 마지막 구간 모두에서 전측두근과 교근의 평균중간주파수와 중간주파수 기울기는 좌우사이에 통계적으로 유의한 차이가 없었다. 3. 저작 수준의 등척성 수축 지속시 전측두근과 교근의 마지막 구간 평균중간주파수는 시작 구간 평균 중간주파수보다 통계학적으로 유의하게 낮았다.(전측두근 : p<0.01, 교근 : p<0.01). 4. 전측두근과 교근에서 저작 수준의 등척성 수축이 지속됨에 따라 시작 구간과 마지막 구간 모두에서 power spectrum은 저주파 영역으로 이동하였으나, 중간주파수 기울기는 시작 구간과 마지막 구간 사이에 통계적으로 유의한 차이가 없었다.

• Journal of Oral Medicine and Pain
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• v.39 no.4
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• pp.146-151
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• 2014

Purpose: To determine whether a fatiguing clench significantly affects the changes in pressure pain threshold (PPT) in men compared to women. Methods: The changes of PPTs from before to after a sustained clench in 12 men and 12 women were obtained. We used a decrease in median frequencies of surface electromyography (EMG) power spectra from the start to the end of the sustained clench as evidence of fatigue. Endurance time for the clench was used as a covariate. Results: The median frequencies decreased after the clench in both the anterior temporalis and masseter muscles, did not differ with the muscle or the gender of the subjects, and none of the interaction terms were significant. The PPTs were lower for women for both muscles, were decreased after the sustained clench, but failed to show the hypothesized gender by time interaction. Conclusions: Our results show that women have lower PPTs than men, but do not respond differently than men to jaw muscle fatigue.