• Title/Summary/Keyword: 하악과두

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A STUDY OF CONDYLAR POSITIONAL CHANCES BEFORE & AFTER STABILIZATION SPLINT THERAPY (교합안정장치 사용 전, 후의 하악과두 위치 변화에 관한 연구)

  • Lee, Suk-Kyung;Yoon, Young-Jooh;Kim, Kwang-Won
    • The korean journal of orthodontics
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    • v.28 no.1 s.66
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    • pp.113-122
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    • 1998
  • Stabilization splint therapy Precedes orthodontic intervention to enable the operator to find a 'true' centric(which is stable and comfortable), to test the patient's response to a change in the occlusion, prior to embarking upon a complex course of occlusal therapy : and finally, to see if the centric relation position can be stabilized. For this study, 47 malocclusion Patients enrolled for orthodontic treatment at the Department of Orthodontics, College of Dentistry, Chosun University comprised the malocclusion group, little variation of growth factor by the second molar eruption. They had Cr-Co discrepancy beyond normal range. For each patients the stabilization splint with mutually protected type of occlusal scheme was applied for 3 months. Condylar positions in CR and CO were measured using Penadent articulators, Panadent condylar position indicator(CPI), and transcranial projection before & after stabilization splint therapy. On the basis of this study, the results of this study were as follows 1. In all samples using CPI, there were statistical significances in CR-CO discrepancy(p<0.001) both before 8t after stabilization splint therapy. 2. In Rt and Lt+Rt/2 of superior joint space using transcranial projection, there were statistical significances in CR-CO discrepancy({<0.05) before & after stabilization splint therapy. 3. In supero-inferior components using CPI, there were statistical significances in CR-CO discrepancy(p<0.01) before & after stabilization splint therapy. 4. In all components except Rt using transcranial projection, there were no statistical significances in CR-CO discrepancy(p>0.05) before & after stabilization splint therapy. To sum up, CPI might be more effective than transcranial projection to reveal the changes between CR-CO discrepancies and stabilization splint might be more useful appliance for displaying the vertical changes, than the antero-posterior changes, of condylar position.

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CASES OF THE SURGICAL CORRECTION OF FACIAL ASYMMERY (비대칭 안모의 외과적 치험례)

  • Huh, Hong Yell;Min, Sung Ki;Cho, Sang Ki;Jeong, In Won
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.13 no.2
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    • pp.191-198
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    • 1991
  • This is a case report and review of literature of the facial asymmetry corrected by various surgical methods. In case 1, facial asymmetry resulted from osteochondroma of condyle and corrected via condylectomy only. In case 2, unilateral condylar hyperplasia with compensatory maxillary growth resulted in severe facial asymmetry. Procedures used in case 2 are vertical ramus osteotomy, condylectomy, genioplasty, mandibular inferior border ostectomy and Le Fort I osteotomy.

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ULTRASTRUCTUAL ANALYSIS OF THE FIBROUS LAYER OF CONDYLE IN THE RAT TEMPOROMANDIBULAR JOINT WITH AGEING (가령에 따른 흰쥐 하악과두 섬유층의 미세구조 및 교원원섬유의 변화)

  • Byeon, Ki-Jeong
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.20 no.4
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    • pp.305-315
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    • 1998
  • The fibrous layer of mandibular condyle of the neonatal, 1-, 7-, 14-, 27-, 55-days and 1 year old rats were examined in the electron microscope with particular attention to the ultrastructure and diameter of collagen fibrils. In the 1-day rats, most of the cells of the fibrous layer were undifferentiated mesenchymal cells and fibroblasts with rough a little developed rough endoplasmic reticulum(RER) and golgi apparatus(GA). In 7-, 17 and 27-days old rats, most of the fibroblast showed well developed GA and RER with widely distended cisternae containing granular materials. In many of these cells contained intracytoplasmic filaments among the cytoplamic organelle. In 55-day and 1-year old rats, three types of cells were observed, ie, cells containing well developed cytoplasmic organelle presumed to be involved in the collagen fibril synthesis, cells showing well developed lysosomes, golgi apparatus, mitochondria and short cytoplasmic process presumed to be involved in the active resorption of the injured collagen fibrils or cellular debris, cells containing many intracytoplasmic filaments and a little organelle presumed to be cells of inactive state. The average diameters of collagen fibrils were similar in 1- and 7-day old rats as $38.48{\pm}3.81nm$, $38.06{\pm}3.86nm$. That was thickest in 14 days old rats as $50.21{\pm}3.93nm$ among experimental groups. They were gradually thinner in 27-, 55-day rats as $40.05{\pm}2.52nm$, $43.63{\pm}1.20nm$ and thinnest in 1-year old rats as $37.38{\pm}2.17nm$. The distribution pattern of diameters of collagen fibrils were unimordal with peak of 30-60nm in rats from 1-day to 17-day old. With aging from 27-day to 1 year old rats, collagen fibril diameters showed wide distribution pattern and percentage of thin collagen fibrils increased. These results may show the functional adaptation of fibrous layer of mandibular condyle to the increased mechanical forces with aging.

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RECONSTRUCTION OF UNILATERAL TMJ ANKYLOSIS WITH METALLIC CONDYLAR PROSTHESIS;REPORT OF A CASE (금속 이식물을 이용한 악관절 강직증의 치험례)

  • Lee, Dong-Keun;Yim, Chang-Joon;Kang, Moon-Jeong
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.11 no.2
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    • pp.40-46
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    • 1989
  • Destruction of normal temporomandibular joint architechture may produce serious functional and cosmetic deficiencies. The literature is well documented as to the etiology and pathogenesis of temporomandibular joints. Numorous surgical procedure have been advocated for temporomandibular joint ankylosis from condylectomy to arthroplasty, cartilage transplant, metallic prosthesis, interpositional implant. These were to able reconstruct the normal mandibular function, and any even procedure could obtain the satisfactory results. In this paper, we reviewed young adult patient with TMJ ankylosis and facial asymmetry who was treated with metallic condylar prosthesis and orthognathic surgery.

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Noninvasive Functional Therapy of Mandibular Condylar Fracture (기능적 처치에 의한 하악과두 골절의 치험 3례)

  • Park, Jin-Ho;Kim, Jong-Sup;Im, Nan-Hi;Yun, Hong-Sil;Chin, Byung-Rho;Lee, Hee-Kyung
    • Journal of Yeungnam Medical Science
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    • v.11 no.2
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    • pp.398-404
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    • 1994
  • Functional recovery after mandibular condyle fracture was a contradictory result of many authors. The treatment goal of condyle fracture has been directed primarily toward restoration of functional movement of the mandible. We selected some patients who requested functional therapy in many cases of condylar fracture, depend on pattern of fracture, patient's demand, occlusion, age. Without intermaxillary fixation, we induced the patients to rapid healing of temporomandibular function and normal mandibular protrusive, lateral movement as a result of early functional therapy by activator. So, the authors report the cases with review of concerned literature.

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