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토끼에서 후방십자인대 손상 후 후방십자인대의 기계적 수용기의 변화
정영복,이재성,김경환,Jung Young Bok,Lee Jae sung,Kim Kyoung Hwan 대한정형외과스포츠의학회 2002 대한정형외과스포츠의학회지 Vol.1 No.1
Purpose : To assess the change in the number of mechanoreceptors of posterior cruciate ligament(PCL) after transecting posterior cruciate ligament of the rabbit. Materials and Methods : We selected 10 skeletally-matured New Zealand white rabbits and one of the two posterior cruciate ligaments was transected and the other underwent sham-operation on each rabbit. Afterward, PCLs with synovium were obtained at femoral attach area in both knees in 20 weeks postoperatively, but in one of the cases, the transected PCL did not heal and had to be excluded from this study. Consequently, histologic examination of the ligament for the remaining 9 cases was done after being prepared with modified gold chloride stain. Results : The study showed a little bit more decrease in the number of mechanoreceptors in the transected group compared with that in the sham-operated group, but the number was statistically negligible. Conclusions : It is considered that the knee joint with injured PCL may still maintain proprioception since the decrease in the number of mechanoreceptors is not considerable, but further study on biomechanical role and function of mechanoreceptor of healed PCL is required. 목적 : 토끼후방십자인대의절단뒤후방십자인대의치유와기계적수용기의수적변화에대해관찰하고자하였다. 대상및방법 : 골성숙이완료된열마리의뉴질랜드산흰토끼를 이용하여각각에서양측슬관절중한쪽슬관절에서는후방십자인대를절단하고, 다른한쪽에는샴술기를시행한후20주후에생검하여후방십자인대의치유가이루어진9례에서조직학적검사를시행하여후방십자인대를절단한슬관절과샴술기를시행한슬관절을비교하였다. 결과 : 후방십자인대절단후치유가이루어진조직들에서샴술기를시행하였던조직보다기계적수용기가약간감소한것으로관찰되었으나통계적유의성은없었다. 결론 : 후방십자인대가손상된슬관절에서비록기계적수용기가감소한다할지라도고유감각이유지될수있을것으로사료되나기계수용기의손상된후방십자인대에대한작용과생역학적기능에대해서는좀더연구가이루어져야될것으로사료된다.
기능성 막 제조를 위한 DPPC 지질막과 탄수화물 혼합막에 관한 연구
정택서,이재성,이기창,홍장후 ( Teak Suh Jeong,Jae Seong Rhee,Ki Chang Lee,Jang Hoo Hong ) 한국공업화학회 1996 공업화학 Vol.7 No.2
막의 기능설계를 하기 위하여 DPPC(dipalmitoylphosphatidylcholine)인 지질로 제조한 liposome과 DPPC와 DTAB(dodecyltrimethylammonium bromide)를 혼합하여 liposome을 제조하여 그 구조변화를 조사하였다. 막 구조의 변화는 CF(carboxylfluorescein)를 이용하여 DPPC의 상전이 온도(t_c=41℃) 이상과 이하에서 측정하여 평가하였다. DPPC liposome에 함유된 CF의 유출에 의한 형광강도는 45℃에서 증가되었지만 20℃에서는 그 변화는 관측되지 않았다. 동등한 조건에서 DPPC/DTAB liposome에서 CF 유출에 의한 형광강도의 변화는 DPPC liposome에 비하여 큰 것이 관측되었다. 이 결과는 DPPC/DTAB liposome이 불규칙한 배열을 하고 있다는 것을 시사한다. 한편 Ca^(2+) 존재하에서 DPPC liposome과 DTAB/DPPC liposome에서 Quin 2의 형광강도는 45℃에서 현저히 증가되었지만 20℃에서는 거의 변화하지 않았다. 그리고 형광강도의 변화는 DPPC/DTAB liposome보다 DPPC liposome 쪽이 더 크게 나타났다. 이것은 DPPC/DTAB liposome의 구조가 DPPC liposome보다 더 안정하다는 것을 의미한다. 또한 형광물질인 ANS를 이용하여 막 표면의 양상을 조사한 결과 DPPC liposome과 DPPC/DTAB liposome에서 ANS의 형광강도는 45℃와 20℃에서 다른 양상을 보였다. 이 양상은 상전이 온도의 이상과 이하에서 DPPC liposome과 DPPC/DTAB liposome의 막유동성을 의미하고 그 변화랑은 DPPC liposome이 DPPC/DTAB liposome보다 더 컸다. 또한 DSC에 의해 측정된 상전이 온도는 DPPC liposome의 경우 41℃이었으며 DPPC/DTAB liposome의 경우에는 32℃이었다. 이상의 결과로 DPPC/DTAB liposome의 분자배열 상태가 불규칙한 것을 의미한다. 그러므로 DPPC/DTAB liposome은 불규칙하게 배열되어 있지만 안정된 구조를 갖고 있다고 생각된다. In this article, we investigate into the structural changes of liposome to design its functional membranes by the synthesis of two types of liposomes, DPPC liposome and DTAB of hydrocarbon substance/DPPC liposome. The changes of membrane structures are evaluated by the CF fluorescent intensity measured above and below the phase transition temperature of the membrane, t_c=41℃. CF fluorescent intensities are enhanced by the CF leakage from DPPC liposome at 45℃, while no changes are observed at 20℃. Under the same conditions, it is observed that the intensity enhanced by CF leakage from DPPC/DTAB liposome is larger than that of DPPC liposome alone, which suggests that DPPC/DTAB liposome has irregular arrangement. Under the presence of Ca^(2+), Quin 2 fluorescent intensity in either DPPC liposome or DPPC/DTAB liposome is significantly increasing at 45℃, while almost none of the changes are observed at 20℃. The fluorescent intensity of DPPC liposome turns out to be larger than that of DPPC/DTAB liposome, which suggests that the DPPC/DTAB liposome is structurally more stable than the DPPC liposome. Additionally, when the analysis is done to observe changes in the shapes of membrane surfaces with ANS fluorescent, ANS fluorescent under DPPC or DPPC/DTAB liposome shows each of different appearances at 45℃ and 20℃ respectively. This result indicates that its respective membrane fluidity is changing above and below of the designated temperatures in phase transition. As to the magnitude of change of its membrane fluidity, DPPC liposome is much larger than DPPC/DTAB liposome. As far as the temperatures in phase transition measured by DSC are concerned, it is 41℃ and 32℃ for DPPC and DPPC/DTAB liposome respectively, which suggests that DPPC/DTAB liposome has an irregular molecular arrangement in its structure. That is, it is summed up that DPPC/DTAB turns out to be structurally stable, even so, its structure is irregularly arranged.
슬관절 전 치환술시 후방십자인대 보존형과 절제형간의 임상적 비교
정영복(Young Bok Jung),태석기(Suk Kee Tae),진휘재(Whui Jae Jin),송광섭(Kwang Sup Song),이재성(Jae Sung Lee) 대한슬관절학회 2000 대한슬관절학회지 Vol.12 No.1
Purpose : To evaluate the effect of posterior cruciate ligament retaining on clinical results in tota] knee arthroplasty Materials and Methods: Ninety-nine cases(80 patienis) of osteoarthritis were evaluated average 39 months(range 25-98 months) after total knee arthroplasty with LCS. the cases was divided into posterior cruciate retained group I(54 knees) and sacrificed group Il(45 knees). Results: There was no statistically significant difference in H.S.S. knee score(I:87.4±6.3, II:86.1±5.7), range of motion(l:113.7°±19.8°, II:111.9°±10.9°), stability and roent- genographic findings, however, the functional score of the H.S.S. score was higher in group I(l: l8.2±5.6, II:15.3±4.5. p<0.05) and 6 patients with preoperative range of motion below 50 were in group II. 4 patients of 5 bilateral paired patients who ascended and descended stairs with one leg at a time prefer PCL retained side subjectively. Conclusion : We found no significant difference between group I and II in clinical results, however, might be that subjective symptom is excellent in group I and PCL sacrificed design seems to be effective in severely deformed knees and too tight PCL tension.