• 대한치과보철학회지
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• 제29권2호
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• pp.285-294
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• 1991

The human temporomandibular joint as a ginglymoarthrodial one has much in common with the other synovial joints of the body, but it does possess an unique charachteristic in that it must accomodate the various occlusal relations of dentition during an end point of closure. For that reason, the movement of the condyle in the temporomandibular joint is susceptible to influences from the nature of occlusion. Undue loading to the temporomandibular joint can be applied on the occasion of premature contacts in centric relation, balancing side interferences, change of occlusal surfaces due to excessive attrition, loss of tooth. Such occlusal disharmonies in association with the systemic and emotional factors may give rise to the temporomandibular disorder. On the other hand, the changes of occlusal patterns in the growing body can also have an effect on the growth of the temporomandibular joint through the alterations of functional stresses. The purpose of this study was to observe histopathologic response of the temporomandibular joint in unilateral chewing on one side exclusively for 10 months. Three dogs showing normal masticatory function were chosen. One dog aged about 12 months was for control, two dogs for experimental specimens were about 12 and 18 months old respectively. For chewing on the left side only, unilateral lower right premolar and molar were extracted in two experimental specimens. And then three dogs were sacrificed 10 months later. Frontal histologic sectioning of joints were done for the observation of the effects of one-side chewing. 24 specimens from three dogs were obtained and fixed in 10% formalin and routinly processed with H-E staining for histologic examination. The light microscopic findings were interpretated as follows: 1. Experimental specimen 1 aged about 22 months: In comparison with control and right non-chewing side, the proliferative and hypertrophic zone were increased at the mesial and lateral part of left chewing side condyle. There was no change of the articular tissue of temporal bone. 2. Experimental specimen 2 aged about 28 months: The articular tissues of adult joint were observed. The differences between the chewing and non-chewing side were not seen in the articular tissues of condyle and temporal bone.

• 치위생과학회지
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• 제18권2호
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• pp.124-129
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• 2018

본 연구는 골관절염의 유병률이 증가하는 시기인 성인을 대상으로 악관절 증상과 요추질환의 관련성 분석을 통해 구강 건강 및 일반적인 건강 향상을 위한 보건정책개발에 도움이 되고자 수행하였다. 대표성이 있는 국민건강영양조사 자료 중 제5기 3차년도(2012년) 자료를 활용하였으며 연구목적에 적합한 만 50세 이상을 대상으로 건강설문 및 요추관절 방사선 검사를 완료한 3,017명을 연구대상으로 분석을 수행하였다. 악관절 증상의 여부는 16.1%가 최근 1년간 악관절 부위에서 이상 증상을 한 가지 이상 경험했다고 답하였다. 요통의 경우 20.6%가 최근 3개월 동안 요통이 있다고 답하였으며, 요추관절 방사선 영상 진단결과에 따른 요추 골관절염이 있는 사람은 30.6%로 나타났다. 악관절 증상을 경험한 사람의 경우 요통 유병위험률이 정상군에 비해 1.70배(95% CI, 1.30~2.22) 증가하는 것으로 나타났으며, 요추 골관절염 유병 위험률은 정상군에 비해 1.20배(95% CI, 0.86~1.68) 증가하는 것으로 나타났다. 본 연구결과 성인의 악관절 증상이 요추 골관절염 유병위험률과의 관련성에서는 유의하지는 않았지만 요추질환의 전형적인 증상인 요통에는 영향을 미치는 것을 알 수 있었다. 따라서 성인들의 악관절 증상에 대한 적절한 치료 및 예방을 한다면 요추질환 유병률을 낮추고, 삶의 질을 높이는 데 중요한 작용이 될 것으로 판단된다. 또한 향후 악관절 장애와 요추질환에 대한 적절한 관리프로그램 개발 및 체계적인 지원이 필요하다고 생각된다.

• PNF and Movement
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• 제14권1호
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• pp.53-57
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• 2016

Purpose: This study aimed to examine the correlation between the asymmetric ratio of occlusal force of the temporomandibular joint and the thickness of the middle scalene muscle. Methods: The study measured the occlusal force of the right and left temporomandibular joints in 30 subjects (12 males and 18 females). Pearson's correlation analysis was performed to examine the effect of occlusal force on the asymmetric ratio of the thickness of their middle scalene muscles by measuring the force using ultrasound after the break. Results: The correlation between the asymmetric ratio of occlusal force and muscle thickness is 0.41, according to Pearson's correlation coefficient. Therefore, the result shows a moderate correlation with the asymmetric ratio of the temporomandibular joint depending on differences in the thickness of the middle scalene muscle. Conclusion: Based on the above results, the asymmetric ratio of occlusal force was found to correlate with the thickness of the middle scalene muscle. Thus, therapeutic intervention is required for the middle scalene muscle in the case of temporomandibular joint disorder.

• 한국산학기술학회논문지
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• 제21권2호
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• pp.381-387
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• 2020

본 연구는 일부 성인의 정신건강 수준, 평소 구강 습관이 턱관절 증상에 미치는 영향을 살펴보고자 시행하였다. 연구 대상은 2019년 9월 1일부터 30일까지 청년기 성인을 대상으로 설문 조사를 시행하였으며 총 402명을 대상으로 하였다. 그 결과 불안, 우울, 사회적 부적응 영역의 정신건강 수준은 삶의 만족도(p<0.001)와 주관적 건강 상태(p<0.001), 외상 경험(p<0.01)과 유의한 차이를 나타냈다. 턱관절 치료 경험자는 사회적 부적응 영역(p<0.05)의 정신건강 수준에서 유의한 차이를 나타냈다. 턱관절 증상은 여성(p<0.05), 음주자(p<0.01), 외상(p<0.01)과 턱관절 치료 경험자(p<0.001)에서 높게 나타났으며, 통계적으로 유의한 차이를 나타냈다. 정신건강 수준(p<0.001), 구강 습관(p<0.001)과 턱관절 증상(p<0.001)은 모두 양의 상관성을 나타냈다. 구강 습관(p<0.001)이 턱관절 증상에 가장 큰 영향을 미쳤으며 외상(p<0.05)과 턱관절 치료 경험(p<0.001)도 턱관절 증상에 영향을 미치는 것으로 나타났다. 이상의 결과로 볼 때 턱관절 증상을 치료 시 구강 습관을 개선하는 것이 가장 중요하며, 정신건강 상담치료와 평소 생활습관의 개선 노력을 병행하여 턱관절 건강을 효과적으로 개선하고 적용할 수 있는 프로그램의 개발이 필요할 것으로 생각된다.

• Imaging Science in Dentistry
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• 제33권1호
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• pp.1-4
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• 2003

Purpose : The purpose of this study was to investigate the distribution and frequency of temporomandibular joint (TMJ) effusion in magnetic resonance (MR) images of patients with disc displacements. Materials and Methods: On T2 weighted MR images of 148 TMJs taken from 74 patients presenting with TMJ pain and dysfunction, we assessed the cases showing TMJ effusion, defined as an amount of fluid that exceeded the maximum amount seen in a control group of asymptomatic volunteers. The amount of TMJ fluid was graded as: I (none or minimal), II (moderate), III (marked), and IV (extensive), according to a standard set by a reference. Disc displacement categories were also recorded. Results: Of the 148 TMJs examined in this study, 52 joints (35.1%) presented with joint effusion, 24 (16.2%) showing bilateral joint effusion. 38 joints showed upper joint space effusion, 3 showed lower joint space effusion, and 11 showed both upper and lower joint space effusion. 96 joints (64.9%) had grade I joint fluid, 27 (18.2%) grade II, 15 (10.1 %) grade III, and 10 (6.8%) grade IV. 80.0% of the joints presenting with grade IV effusion showed disc displacement without reduction. Conclusion: Joint effusion was found not only in upper, but also in lower joint spaces. The higher the effusion grade, the greater the frequency of disc displacement without reduction.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제27권6호
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• pp.545-551
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• 2005

Purpose: The effect of orthognathic surgery on the temporomandibular dysfunction has been controversial. The purpose of this study is to prove statistically that early removal of fixation plate at postoperative 2 weeks with active exercise of mouth opening could relieve preoperative temporomandibular dysfunction and reposition of temporomandibular joint. Patients and Methods: All 28 subject patients underwent mandibular setback with BSSRO in Kyunghee medical center by one surgeon. The fixation plates used for rigid fixation were removed at postoperative 2 weeks and we had the patients excercise active mouth opening with intermaxillary rubber rings for the guiding proper postoperative occlusion. Temporomandibular symptoms were checked and radiographs were taken before surgery, within a month after surgery, six to twelve months after surgery respectively. Results: The temporomandibular dysfunction symptoms were relieved after the surgery and the condyle was displaced inferior-posteriorly immediate after surgery and repositioned toward its original position during follow-up periods. Conculusion: Orthognathic surgery may benefit temporomandibular joint dysfunction by obtaining a postoperative stable occlusion and more physiologic neuromuscular function. The early removal of fixation plates after BSSRO could reposition the temporomandibular joint to physiologic position and relieve the symptoms of temporomandibular dysfunction by permitting movement of proximal segment.

• Journal of Korean Dental Science
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• 제17권1호
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• pp.14-35
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• 2024

The temporomandibular joint (TMJ) is one of the most unique joints in the human body that orchestrates complex movements across different orthogonal planes and multiple axes of rotation. Comprising the articular eminence of the temporal bone and the condylar process of the mandible, the TMJ integrates five major ligaments, retrodiscal tissues, nerves, and blood and lymph systems to facilitate its function. Cooperation between the contralateral TMJ and masticatory muscles is essential for coordinated serial dynamic functions. During mouth opening, the TMJ exhibits a hinge movement, followed by gliding. The health of the masticatory system, which is intricately linked to chewing, energy intake, and communication, has become increasingly crucial with advancing age, exerting an impact on oral and systemic health and overall quality of life. For individuals to lead a healthy and pain-free life, a comprehensive understanding of the basic anatomy and functional aspects of the TMJ and masticatory muscles is imperative. Temporomandibular disorders (TMDs) encompass a spectrum of diseases and disorders associated with changes in the structure, function, or physiology of the TMJ and masticatory system. Functional and pathological alterations in the TMJ and masticatory muscles can be visualized using various imaging modalities, such as cone-beam computed tomography, magnetic resonance imaging, and bone scans. An exploration of potential pathophysiological mechanisms related to the TMJ anatomy contributes to a comprehensive understanding of TMD and informs targeted treatment strategies. Hence, this narrative review presents insights into the fundamental functional anatomy of the TMJ and pathological changes that evolve with TMD progression.

• Journal of Oral Medicine and Pain
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• 제23권2호
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• pp.127-141
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• 1998

This study was performed to investigate the clinical features of internal derangement of temporomandibular joint. For this study, 117 patients with temporomandibular disorders and 81 dental students without any signs and symptoms of temporomandibular disorders were selected as the patients group and as the control group, respectively. Preferred chewing side, Angle's classification, lateral guidance pattern, maximal mouth opening range, and affected side were recorded clinically. Head and shouldeer posture was measured in a groundplate on which square diagram of five centimeters each had been drawn, and cephalograph was also taken for measurement of head and neck posture. Sonopak of Biopak system (Bioresearch inc., USA) was used to record joint vibration for evaluation of internal healthy status of temporomandibular joint. The data collected were analyzed by SAS statistical program. The results of this study were as follows : 1. Frequency of left side chewing subjects was higher in patients than in control group, but there was no difference in distribution of subjects by Angle's classification. Other types was prvalent in patients whereas group function was more in control group for lateral guidance pattern. 2. As to lateral guidance pattern by clinical diagnosis, patients with internal derangement and/or degenerative joint disease showed higher frequency was consistent with the result by Sonopak impression. 3. There was no difference for shoulder height between the two groups, however, tilting of head and backward extension of cervical spine was more frequent in control group. 4. Acromion was positioned more anteriorly in patients with internal derangement and/or degenerative joint disease than in control group and angle between eye and tragus was larger in patients. Patients with degenerative joint disease showed more flexed head posture than control group did in cephalometric profile. 5. Maximal mouth opening range in patients with internal derangement was the least in all subgroups in patients classified by Sonopak impression.

• 턱관절균형의학회지
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• 제2권1호
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• pp.1-7
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• 2012

Objectives: The purpose of this review is to investigate the relationship between the extra meridians and the temporomandibular joint. Methods: Literature review on the eight extra meridians and theoretical considerations were performed with a focus on the relationship with the temporomandibular joint. Results: Extra meridians are crucial in the maintenance of the balance of the whole body, especially the structural balance of the anterior-posterior, left-right, superior-inferior, and interior-exterior regions. The foundation of extra meridians occurs in the lower abdominal area and the innate qi. Conclusions: Extra meridians are important players in the maintenance of the balance and harmony within the body, and may function cooperatively with the temporomandibula joint in its role to maintain the yinyang balance within the body.

• 대한치과의사협회지
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• 제10권2호
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• pp.121-128
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• 1972

14 patients, whose were attacked pain dysfunction syndrome of temporomandibular joint in Dental College Infirmary, Seoul National University from June 1970 to Dec. 1971, were examined regarding to clinical observation and electromyographical analysis. This paper established the followings: 1. Especially young female was more frequently attacked by pain dysfunction syndrome of Temporomandibular joint. 2. It is suggested that most of joint pain was occurred initially in opening mouth and forcible bite, and left side is more attacked than right side. 3. It was possible that this dysfunction can be occurred by open-bite, premature contact and ill-fitting prosthetic restoration. 4. Hoby, habit and bruxism as causal factors are not markedly related with this dysfunction. 5. Pain attacked regions, in most patients, are preauricular, joint itself, infra-auricular, cervical and external auditory meatus region. 6. In electromyographical studis, the musle activities of affected side of pain dysfunction syndrome are more strong than that of opposite side.