• Title, Summary, Keyword: Meniscus

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RADIOLOGIC STUDY OF MENISCUS PERFORATIONS IN THE TEMPOROMANDIBUlAR JOINT (악관절원판 천공의 방사선학적 연구)

  • Kim Kee-Deog;Park Chang-Seo
    • The Journal of Korean Academy of Maxillofacial Radiology
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    • v.20 no.2
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    • pp.235-250
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    • 1990
  • Thirty-nine patients (forty-four joints) who had been diagnosed as having meniscus perforation of the temporomandibular joint by inferior joint space arthrography and had been treated by surgical procedures were evaluated retrospectively. Information of clinical findings, arthrotomographic findings and surgical findings was collected on a standardized form and evaluated. The results were as follows: 1. On the 34 patients of 38 joints which were surgically confirmed perforation of meniscus or its attachments of the temporomandibular joint, there were 29 females and 5 males (5.8:1). The average age was 36 years (range 17 to 70). 2. The common clinical findings of group that had meniscus displacement without reduction and with perforation were pain on the affected joint and limitation of mouth opening. In the group showing meniscus displacement with reduction and with perforation the common clinical findings were pain and clicking on the affected joint. 3. 32 joints (84.2%) were arthrotomographically anterior meniscus displacement without reduction and with perforation, 6 joints (15.8%) showed anterior meniscus displacement with reduction and with perforation. 4. Joints categorized arthrotomographically as having meniscus displacement without reduction and with perforation were less likely to have full translation of the condyle in comparison with the normal or meniscus displacement with reduction and with perforation groups. (p<0.05) 5.The arthrographic findings of 44 joints having meniscus perforation were compared with surgical findings, there were 6 false positive findings of meniscus perforation, the reliability of arthrographic findings of meniscus perforation was a 86.4% correlation with surgical findings. 6. On the site of perforations of 38 joints which were surgically confirmed perforation of meniscus or its attachments, twenty-three of perforations (60.5%) were in location at the junction of the meniscus and posterior attachment, forteen (36.9%) were located at the posterior attachment and one (2.6%) was at the meniscus itself.

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Displaced Double-Layered Lateral Meniscus That Mimicked the Bucket-Handle Tear: a Case Report

  • Kwak, Min Jee;Kim, Sun Ki;Kim, Ki Jun;Lee, Bum-Sik;Kang, Jun
    • Investigative Magnetic Resonance Imaging
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    • v.20 no.3
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    • pp.191-195
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    • 2016
  • Among the various types of congenital meniscal anomalies, the double-layered lateral meniscus is extremely rare. The double-layered meniscus consists of both the upper additional and the lower normal meniscus. As the upper additional meniscus is mobile, it can be easily displaced, while the lower lateral meniscus is usually normal in shape and volume. A 42-year-old woman suffering from pain and locking of her left knee underwent Magnetic resonance imaging (MRI) examination and an arthroscopic surgery. A rare meniscal abnormality was seen in her left knee, which presented as a double-layered lateral meniscus with displacement. It was remarkable that the upper additional meniscus was displaced over the intercondylar eminence of the tibia and it mimicked a bucket-handle tear. Even though it is rare, it is necessary to consider the possibility of displaced double-layered meniscus in the differential diagnosis of a bucket-handle tear. Here, we report the MRI and arthroscopic findings of a displaced double-layered lateral meniscus, which was similar to the bucket-handle tear.

Discoid Medial Meniscus - A Case Report - (내측 원판형 연골 - 증례 보고 -)

  • Nha, Kyung-Wook;Kim, Dong-Hwan;Kim, Young-Ju
    • Journal of the Korean Arthroscopy Society
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    • v.9 no.2
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    • pp.218-221
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    • 2005
  • The most of discoid meniscus is located in lateral side. Medial discoid meniscus is rare. The medial discoid meniscus was reported by Cave and Staples at first in 1941 but rarely reported since then. A 8 year's old boy was diagnosed as having a complete medial discoid meniscus by means of MRI and arthroscopy. Authors performed the arthroscopic partial menisectomy for medial discoid meniscus. For confirmation of the bilaterality, arthroscopic examination on contralateral knee was performed but we did not find a medial discoid meniscus. We report 1 case of a medial discoid meniscus with a brief review of literatures.

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Meniscus Repair using Meniscus Arrow with Anterior Cruciate Ligament Reconstruction (전방 십자 인대 재건술시 동반된 반월상 연골 파열에 대한 meniscus arrow를 이용한 봉합)

  • Cho Sung-Do;Park Tae-Woo;Hwang Su-Yeon
    • Journal of the Korean Arthroscopy Society
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    • v.6 no.2
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    • pp.156-160
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    • 2002
  • Purpose : To evaluate the results and usefulness of meniscal repair using meniscal arrows with ACL reconstruction. Material and Methods : Among cases of the simultaneous meniscal arrow fixation and ACL recontruction performed between May, 1997 and September, 2000, 17 cases could be evaluated. The average follow-up were 18.5 months. Twelve cases were medial meniscus, 5 cases, lateral meniscus. All cases were longitudinal tear. Meniscal tear were seen at red-red zone in 13 cases, red-white zone in 5 cases. The results were analyzed by pain, joint line tenderness, locking, McMurray test, the Marshall knee scoring scale and complications. Results : Postoperatively two patients had mild joint line tenderness without pain on joint motion or weight bearing. No patient had locking or positive McMurray test. At last follow-up, 15 cases $(88\%)$ were 'excellent' or 'good' according to the Marshall knee score scale. There were two complications which are soft tissue irritation sign on active knee motion and a femoral chondral injury due to protruded T-shaped head of meniscus arrow. Conclusion : Meniscus arrow can be one of the options in repairing the associated meniscus tear, especially the posterior horn of medial meniscus, during ACL reconstruction. However, surgeons using meniscus arrow should be aware of its potential complications such as pain due to soft tissue irritation and chondral damage of the femoral condyle.

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X-ray Significance in Discoid Meniscus (원판형 연골에서 단순 방사선 검사의 의의)

  • Ahn Jin Hwan;Ha Kwon Ick;Kim Hyung Kook;Kim Ho
    • Journal of the Korean Arthroscopy Society
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    • v.1 no.1
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    • pp.102-107
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    • 1997
  • Discoid meniscus has been well known to a frequent anomaly of meniscus and much reported in diagnosis and treatment. But, associated X-ray findings have not been known well. We reported its significance of X-ray findings in discoid meniscus. From May 1995 to May 1997, 31 cases of discoid meniscus were compared with 51 cases of nondiseoid meniscus both confirmed by arthroscopy, with simple X-my findings. Both groups were evaluated by X-ray findings in view of lateral joint space widening, peripheral spur of lateral joint space, sclerotic change of lateral tibial plateau, concave lateral tibial plateau, flattening of lateral femoral condyle, hypoplasia of lateral femoral condyle and high riding fibula. The results of analysis were as follows: 1. Widening of lateral joint space, sclerotic change of lateral tibial plateau and cupping of lateral tibial plateau were statistically significant in discoid meniscus. 2. X-ray findings in discoid meniscus were not associated with patient's injury history and symptom duration. 3. Other X-ray findings were not related in discoid meniscus significantly. X-ray findings with patient's history and physical examination arc helpful in the diagnosis of discoid meniscus.

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조직공학을 이용한 반월판 연골의 재생

  • Son, Seon-Mi;Gang, Seon-Ung;Park, Jeong-Ho;Choe, Cha-Yong;Kim, Byeong-Su
    • 한국생물공학회:학술대회논문집
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    • pp.59-61
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    • 2002
  • The injury of meniscus, integral components of the knee joint, is a common sports-related problem and the most frequent injurγ to the knee joint.$^1$ This study was aimed to tissue-engineer meniscus in rabbit models. Cells isolated from rabbit meniscus were seeded onto meniscus-shaped, biodegradable polymer matrices and implanted to rabbit knee joints The tissue-engineered meniscus explanted at 6 and 10 weeks showed gross and histologic evidences similar to those of native meniscus. This study may lead to the development of tissue-engineered meniscus appropriate for clinical applications.

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Discoid Medial Meniscus - case report - (내측 원판형 연골 1례 보고 - 증례 보고 -)

  • Bae, Dae Kyung;Yim, Chang Moo;Chun, Young Soo
    • Journal of the Korean Arthroscopy Society
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    • v.2 no.2
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    • pp.177-180
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    • 1998
  • Discoid meniscus is an uncommon cause of internal derangement of the knee joint. The discoid medial meniscus is much less common than the discoid lateral meniscus. A 15-year-old male student had a incomplete discoid medial meniscus of right knee combined with a horizontal tear. This was confirmed by magnetic resonance imaging(MRI) and arthroscopic procedure. Partial meniscectomy was performed arthroscopically. An unevenful recovery followed. We report a case of discoid medial meniscus with brief review of literature.

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Flow and Heat Transfer Characteristics of the Evaporating Extended Meniscus in a Micro Parallel Plate (마이크로 평판내 증발에 의한 확장초승달영역의 열/유동특성)

  • Park, Kyong-Woo;Noh, Kwan-Joong;Lee, Kwan-Soo
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.27 no.4
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    • pp.476-483
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    • 2003
  • A mathematical model is presented to predict the two-phase flow and heat transfer phenomena of the evaporating extended meniscus region in a micro-channel. The pressure difference at the liquid-vapor interface can be obtained by the augmented Laplace-Young equation. The correlative equations for film thickness, pressure, and velocity in the meniscus region are derived by applying the mass, momentum, and energy equations into the control volume. The results show that increasing the heat flux and the liquid inlet velocity cause the length and liquid film thickness of the extended meniscus region to decrease. The variation, however, of the heat flux and liquid inlet velocity has no effect on the profile of film thickness. The majority of heat is transferred through the thin film region that is a very small region in the extended meniscus region. It is also found that the vapor velocity increases gradually in the meniscus region. However, it increases sharply at the junction of the meniscus and thin film regions.

Discoid Medial Meniscus Rupture - Case report - (원판형 내측 연골판 파열 - 1 예 보고 -)

  • Kim, Dong-Hui;Kim, Bae-Gyun;Kim, Jung-Man
    • Journal of the Korean Arthroscopy Society
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    • v.8 no.1
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    • pp.51-53
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    • 2004
  • Although the lateral discoid meniscus of the knee has been observed frequently, the discoid medial meniscus has rarely been reported in the literature. A discoid medial meniscus with the horizontal tear and the peripheral tear of upper lip were observed. This tear pattern is not usual in the lateral discoid meniscus as well as in the normal meniscus. A plausible mechanism of the tear pattern compared with the normal shape and the discoid lateral meniscus was discussed in the following.

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Anomalous Insertion of the Anterior horn of the Discoid Lateral Meniscus into the Anterior ACL - A Case Report - (외측 원판형 연골 전각부의 전방십자인대 전방부로의 부착변형에 관한 증례보고)

  • Lee, Sang-Hoon;Yi, Seung-Rim;Noh, Jung-Ho;Ryu, Ho-Kwang
    • Journal of the Korean Arthroscopy Society
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    • v.13 no.2
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    • pp.165-169
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    • 2009
  • The lateral meniscus is morphologically more variable than the medial meniscus. An abnormal lateral meniscus also varies with respect to its size, shape and stability, and such variations can occur in any patient of any age. The most common variant is a discoid lateral meniscus. We recently encountered a patient with a discoid lateral meniscus for which the anterior horn of the meniscus was anomalously inserted into the anterior ACL. The patient was forty five years old women who had persistent pain for three to four years without any specific trauma history. She was preoperatively diagnosed as having discoid lateral meniscus by MRI, and was confirmed the presence of the complex tear and anomalous insertion of the anterior horn of the discoid lateral meniscus into the anterior ACL by arthroscopic examination. Arthroscopic subtotal meniscectomy was performed and the symptoms were improved after surgery.

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