• Journal of Oral Medicine and Pain
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• 제35권2호
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• pp.149-154
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• 2010

측두하악관절부위에 발생하는 양성 외방성 증식은 골종, 연골종, 골연골종 및 활액성 연골종증 등이 있으며 증상으로는 통증, 개구제한 등을 보이며 때때로 교합변화 하악정중선변위등을 수반한다. 이러한 양성 외방성 증식은 측두하악장애와 비슷한 증상으로 인해 임상 증상만으로 진단 하는 것은 어려우며, 단층촬영, 자기공명영상을 포함한 방사선 사진을 평가하여야 하며, 확진을 위해서는 생검을 필요로 한다. 활액성 연골종증과 골연골증은 인체의 장골에 흔한 양성 종양이며 구강안면부위에 있어 발생이 비교적 드물다. 본 연구는 측두하악관절에 비교적 드물게 발생하는 활액성 연골종증과 골연골종에 대하여 보고하고 진단에 대해 다소의 지견을 얻었기에 문헌 고찰과 함께 보고하고자 한다.

• 치과방사선
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• 제24권2호
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• pp.291-304
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• 1994

The purpose of this study was to analyze the facial asymmetry of the patients with the craniomandibular disorder. In this study, 50 patients, who have joint clicking and pain, mouth opening limitation, and 40 dental students, Chosun University, who did not posses any restoration and orthodontic treatment, joint clicking and pain, mouth opening limitation, were selected as the control group. Both the control group and the patient group were takened skull P-A, submento-vertex radiogram by standized methods. After that, the deviation and facial asymmetry were measured and analyzed. The results of the this study were as follows: 1. In the Skull P-A radiogram, the width difference of control group and patient group measured that the △ Cg-Go-Cl: control group were 3.35㎜, patient group were 4.51㎜ (P<0.05), the △Cg-Zy-Go: control group were 1.83㎜, patient group were 3.27㎜(P<0.001). 2. In the Skull P-A radiogram, the height difference of control group and patient group measured that the △ Cg-Go-Cl: control group were 131.85㎜, patient group were 188.45㎜(P<0.05), the △Cg-Zy-Go: control group were 1.58㎜, patient group were 2.68㎜(P<0.00l). 3. In the Skull P-A radiogram, the area difference of control group and patient group measured that the △ Cg-Go-Cl: control group were 120.76㎟, patient group were 185.49㎟(P<0.05), the △Cg-Zy-Go: control group were 2.29㎟, patient group were 3.37㎟(p<0.05). 4. In the submento-vertex radiogram, the width difference of control group and patient group measured that the △Mr-Cl-Ia: control group were 1.50㎜, patient group were 2.35㎜(P<0.05), the △Mr-Cm-Ia: control group were 1.75㎜, patient group were 3.17㎜(P<0.05), the △Mr-Go-Ia: control group were 1.96㎜, patient group were 3.24㎜(P<0.001), the △Mr-Cp-Co: control group were 1.74㎜, patient group were 2.73㎜(P<0.05). 5. In the submento-vertex radiogram, the height difference of control group and patient group measured that the △Mr-Cp-Ia: control group were 1.68㎜, patient group were 2.46㎜P<0.05), the △Mr-CI-Ia: control group were 2.38㎜, patient group were 3.74㎜(P<0.05), the △Mr-Co-Ia: control group were 1.63㎜, patient group were 2.80㎜(P<0.05), the △Mr-Cm-Ia: control group were 1.45㎜, patient group were 3.12㎜(P<0.001). 6. In the submento-vertex radiogram, the area difference of control group and patient group measured that the △ Mr-Cp-Ia: control group were 73.17㎟, patient group were 110.16㎟(P<0.05), the △Mr-Cl-Ia: control group were 105.09㎟, patient group were 180.87㎟(P<0.001), the △Mr-Co-Ia: control group were 103.31㎟, patient group were 148.48㎟(P<0.05), the △Mr-Cm-Ia: control group were 97.01㎟, patient group were 167.83㎟(P<0.05), the △Mr-Go-Ia: control group were 104.24㎟, patient group were 205.90㎟(P<0.05).

• 콘크리트학회논문집
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• 제24권2호
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• pp.205-214
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• 2012

균열폭은 콘크리트 구조물의 사용성을 평가하는 측면에서는 매우 중요하다. 균열폭을 일정값 이하로 유지할 수 있다면 낮은 투수성을 유지할 수 있으므로 콘크리트의 피복만으로도 염소이온에 의한 부식을 방지할 수 있다. 따라서 내구적인 구조물을 설계하기 위해서는 인장 균열에 대한 충분한 정보가 필요하다. 그러나 균열폭을 정확하게 계측하는 데는 몇 가지 어려움이 있다. 먼저, 균열의 생성 위치를 미리 알기 어렵다. 또한 변형률 게이지 등 탄성영역에서 사용되는 게이지는 사용할 수 없다. 이러한 문제를 극복하기 위해서 화상상관기법 및 고해상도 CCD를 이용한 균열 및 변위계측 시스템을 개발하였다. 이를 통해서 임의의 위치에 생성되는 인장균열폭을 측정하는 방법을 제시하였다. 변위계측 정밀도 검증을 실시한 결과 평균오차는 0.069 픽셀, 표준편차는 0.050 픽셀이었다. UHPC를 이용하여 직접인장 실험을 수행하였다. 노치 구역과 비노치 구역에서 각각 균열을 측정하는 방법을 제시하고, 하중단계에 따라서 클립인 게이지의 결과와 비교하여 설명하였다. 시편의 전면에서 변위벡터를 구성하고, 등변위도 및 변형률도를 작성하였다. 다양한 실험에 적용할 수 있는 범용의 기법이기 때문에 임의의 균열폭 혹은 전면변위 측정 분야에서 많이 활용될 수 있을 것이다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제23권1호
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• pp.95-102
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• 2001

Temporomandibular ankylosis is defined as a situation in which the condyle is fused to the fossa by bone or fibrous tissue. Conditons such as trauma, infection, or systemic disease may predispose to various types of ankylosis, bringing about different levels of limitation in mandibular movement. Most patients with temporomandibular ankylosis are associated with limitation of maximal mouth opening, deviation of the chin toward the affected side, impaired occlusion, chronic pain, compromised oral hygiene, severe facial asymmetry & impeded mandibular molar eruption occurring in childhood. Several techniques to release ankylosis have been described in the literature, showing variable and often unsatisfactory results. The most frequently used operations are gap arthroplasty, interpositional arthroplasty, and exicision and joint reconstruction with autogenous or alloplastic materials. We have managed the two patients of TMJ ankylosis. They had previously TMJ surgery and we treated with gap arthroplasty & active physial therapy. We have obtained favorable results and report these cases with literatures review.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제26권1호
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• pp.109-113
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• 2000

Synovial chondromatosis is an uncommon disease of cartilage transformation of synovial membrane with formation of loose bodies within the joint space. The knee and elbow are the most commonly involved sites and involvement of temporomandibular joint is very rare. Symtoms include swelling, pain, stiffness of the jaw, and inability to close the jaw. A case involving the temporomandibular joint(TMJ) is presented. A 28-year-old women had experienced pain of the left TMJ area and limitation of mouth opening. Radiographs of the left TMJ revealed calcified mass surrounding over the mandibular condyle and under the glenoid fossa. Treatment consisted of removal of calcified mass, reshaping of affected condyle and reconstruction with a auricular cartilage. After surgery, the patient's range of motion improved although deviation to the affected side. Until present after surgery there have been no recurrence of symtoms. We think that findings of this patitent agree with those of synovial synchondrmatosis in many aspects.

• 대한치과교정학회지
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• 제50권3호
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• pp.206-215
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• 2020

Osteochondroma is a common benign tumor of bones, but it is rare in the mandibular condyle. With its outgrowth it manifests clinically as deviation of the mandible limitation of mouth opening, and facial asymmetry. After the tumor is diagnosed on the basis of clinical symptoms and radiographic examination including cone-beam computed tomography (CBCT) analysis, an appropriate surgery and treatment plan should be formulated. Herein, we present the case of a 44-year-old female patient who visited our dental hospital because her chin point had been deviating to the left side slowly but progressively over the last 3 years and she had difficulty masticating. Based on CBCT, she was diagnosed with skeletal Class III malocclusion accompanied by osteochondroma of the right mandibular condyle. Maxillary occlusal cant with the right side down was observed, but it was confirmed to be an extrusion of the molars associated with dental compensation. Therefore, after intrusion of the right molars with the use of temporary anchorage devices, sagittal split ramus osteotomy was used to remove the tumor and perform orthognathic surgery simultaneously. During 6 months after the surgery, continuous bone resorption and remodeling were observed in the condyle of the affected side, which led to a change in occlusion. During the postoperative orthodontic treatment, intrusive force and buccal torque were applied to the molars on the affected side, and a proper buccal overjet was created. After 18 months, CBCT revealed that the rate of bone absorption was continuously reduced, bone corticalization appeared, and good occlusion and a satisfying facial profile were achieved.

• 치과방사선
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• 제25권2호
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• pp.471-482
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• 1995

Bony remodeling pattern of condyle fractures in children are different from in adult for growing of condyle, also might affect treatment and prognosis of the condyle fracture. Subjects of this clinical and radiologic study were 26 temporomandibular joints diagnosed as condyle fracture in 23 patients under 15 years old age. They were treated with conservative method at Dental Hospital of Yonsei University from Jan., 1986 to Oct., 1994. Bony remodeling related with fracture pattern was evaluated. The results obtained are as follows: 1. The ratio of male to female in patients with condyle fracture was 1 : 0.9 and the difference of sex ratio was not noted. Comparing with preschool-age group and school-age group, age frequency was higher in preschool-age group(83％). 2. Fallen down(54％) was the most frequent cause of condyle fractures. Traffic accident and slip down were followed. 3. The most common clinical sign of condyle fractures was tenderness to paipation09 cases). Mouth opening limitation07 cases), swelling(7 cases), malocclusion(3 cases) were next in order. 4. According to sites of condyle fractures, unilateral fractures were in 20 patients and bilateral fractures in 3 patients, therefore total 23 patients-26 cases of condyle fracture were observed. According to fracture distribution, condyle fractures were in 10 patients(44％). Condyle fractures with symphysis fracture(9 patients, 39％), condyle fractures with ascending ramus fracture(2 patients, 9％), condyle fracture with mandibular body fracture(1 patient, 4％), and condyle fractures with mandibular angle fracture(1 patient, 4％) were followed. 5. In displacement pattern of fractured fragment of mandibular condyle, dispiacement(17 cases, 66％) was most common. Dislocation(5 cases, 19％) and deviation (4 cases, 15％) were next in order. 6. During the observation period of fractured condyles, remodeling patterns of fracture sites related with articular fossa were observed with usual condylar shape in 23 cases and with prominently different shape in 3 cases.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제44권3호
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• pp.112-119
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• 2018

Objectives: Temporomandibular joint ankylosis (TMJA) is a joint pathology caused by bony and/or fibrous adhesion of the joint apparatus, resulting in partial or total loss of function. Materials and Methods: This is a retrospective study conducted between 2012 and 2016 in the northwest region of Nigeria. The data retrieved includes gender, age, etiology of ankylosis, duration of ankylosis, laterality of ankylosis, type of imaging technique, type of airway management, types of incision, surgical procedure, mouth opening, interpositional materials used, and complications. Results were presented as simple frequencies and descriptive statistics. Results: Thirty-six patients with TMJA were evaluated during the study period. There were 21 males (58.3%) and 15 females (41.7%), yielding a male:female ratio of 1.4:1. The patients' age ranged from 5 to 33 years with $mean{\pm}standard$ deviation ($13.8{\pm}6.6years$). Thirty-five cases (97.2%) were determined to be true/bony ankylosis, while only 1 case (2.8%) was false/fibrous ankylosis. Most of the TMJA cases (16 cases, 44.4%) were secondary to a fall. In our series, the most commonly utilized incision was the Bramley-Al-Kayat (15 cases, 41.7%). The mostly commonly performed procedures were condylectomies and upper ramus ostectomies (12 cases each, 33.3%), while the most commonly used interpositional material was temporalis fascia (14 cases, 38.9%). The complications that developed included 4 cases (11.1%) of severe hemorrhage, 1 case (2.8%) of facial nerve palsy, and 1 case (2.8%) of re-ankylosis. Conclusion: Plain radiographs, with their shortcomings, still have significant roles in investigating TMJA. Aggressive postoperative physiotherapy for a minimum of 6 months is paramount for successful treatment.