• Title/Summary/Keyword: 재건

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The Changes of Patellofemoral Alignment after Anterior Cruciate Ligament Reconstruction (전방 십자 인대 재건술후 슬개-대퇴 관절 선열의 변화)

  • Hahn Sung-Ho;Yang Bo-Kyu;Yi Seung-Rim;Chung Shun-Wook;Kwon Gi-Doo
    • Journal of the Korean Arthroscopy Society
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    • v.4 no.2
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    • pp.128-133
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    • 2000

  • Purpose : To compare the changes of the patellar height, patellofemoral alignment and subjective symptom and to compare the effects of patellar tendon harvest after anterior cruciate ligament(ACL) reconstruction using autograft and allograft. Materials and Method : ACL reconstruction was performed on 87 patients who were followed up for minimum 1 year. The group I was 52 patients who were operated with bone-patellar tendon-bone autograft and the group II was 35 patients who were operated with bone-patellar tendon-bone allograft and achilles tendon allograft. At the time of follow-up, the authors evaluated the patellar height by Blackburne-Peel method, Merchant congruence angle, Lateral patellofemoral angle and subjective symptoms were assessed. Results : The patellar heights were significantly decreased from 0.86 preoperatively to 0.80 postoperatively in the group I and from 0.87 preoperatively to 0.83 postoperatively in the group II. There were no significant differences in the lateral patellofemoral angles between the both groups but in the Merchant congruence angle, significant differences were observed in the both groups, from$-1.43^{\circ}$ preoperatively to-$5.43^{\circ}$ postoperalively in the group I and from$-1.53^{\circ}$ preoperatively to$-3.65^{\circ}$ postoperatively in the group II. Conclusion : After ACL reconstruction, the patellofemoral alignment was changed and this kind of changes may be caused by multiple factorials such as harvest of autografts, ACL reconstruction itself, and quadriceps muscle atrophy.

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Effect of fire - retardant treatment and redrying on the mechanical properties of radiata pine (내화처리(耐火處理) 및 재건조(再乾操)가 라디에타소나무의 역학적(力學的) 성질(性質)에 미치는 영향(影響))

  • Chung, Doo-Jin;Jo, Jae-Sung;Yun, Ki-Eon;Kim, Jae-Jin;Kim, Gyu-Hyeok
    • Journal of the Korean Wood Science and Technology
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    • v.27 no.1
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    • pp.37-49
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    • 1999

  • The effect of fire-retardant treatment and redrying on the mechanical properties of radiata pine sapwood were evaluated. Small, clear specimens were treated with three different fire-retardant(FR) chemicals, borax-boric acid(BRX), minalith(MIN), and pyresote(PYR), with target retentions of 30 and 60kg/$m^3$, and then redried at maximum dry-bulb temperature of $25^{\circ}C$, $60^{\circ}C$, $80^{\circ}C$ or $110^{\circ}C$. Each specimen, including untreated and water-treated controls, was tested in static bending and in compression parallel to grain. The extent of strength reduction was dependent on the type of FR chemicals, retention, and redrying temperature, and a highly significant interaction existed between FR treatment and redrying temperature. Modulus of rupture(MOR) and work to maximum load(WML) were significantly decreased by FR treatment and redrying. None of three FR chemicals adversely affect modulus of elasticity (MOE) and maximum crushing strength(MCS). MOE of BRX treatment and MCS of both BRX and PYR treatment increased significantly compared to untreated controls. No significant differences existed between retention levels except for MOE and MCS of some combinations of FR chemicals and redrying temperatures. Although MOE and MCS was not significantly affected by any of the redrying temperatures, these properties were generally decreased with the increase in redrying temperature. The significant reduction in MOR and WML was observed in BRX treatment when dried at temperatures of $60^{\circ}C$ and above, and in MIN and PYR treatment when dried at temperatures of $80^{\circ}C$ and above. Consequently, BRX-treated radiata pine should not be redried at temperatures >$60^{\circ}C$, and MIN- and PYR-treated radiata pine should not be redried at temperatures > $80^{\circ}C$ where bending strength and energy-related properties are important design considerations.

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조직공학을 이용한 골조직 재생 및 재건 연구 동향

  • 김석영
    • Ceramist
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    • v.7 no.1
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    • pp.41-46
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    • 2004

  • 우리나라에서 노령화가 급속히 진행됨에 따라 근골격계(뼈 및 관절부분)의 기능 장애는 개인의 삶의 질을 심각하게 저하시킬 뿐만 아니라 개인 및 국가 경제에도 큰 손실을 초래하고 있다. 현재 국내에서 사용되고 있는 근 골격계의 재생/재건/재활 관련 의료기기 대부분은 수입에 의존하고 있다. 고가의 수입제품의 사용은 심각한 경제적 손실 뿐 만 아니라 환자의 의료비 부담에 따른 양질의 의료혜택에도 지장을 주고 있다.(중략)

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