• Title, Summary, Keyword: 조직복원

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Reconstruction of Midfacial Defect Using Various Free Flap (중안면부 복합조직결손부의 재건을 위한 다양한 유리피판술의 선택)

  • Cho, Jae Hyun;Lee, Won Jai;Lew, Dae Hyun;Rah, Dong Kun;Tark, Kwan Chul
    • Archives of Plastic Surgery
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    • v.33 no.3
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    • pp.283-288
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    • 2006
  • Various vascularized free flaps have been used for midfacial reconstruction after ablative head and neck cancer surgery. The most common donor sites for free flap include latissimus dorsi, rectus abdominis, and radial forearm. Between 1994 and 2004, 14 patients underwent free flap operation after head and neck cancer ablation, and were reviewed retrospectively. Among 14 free flaps, 8 were latissimus dorsi myocutaneous flaps, 3 rectus abdominis myocutaneous flaps and 3 radial forearm flaps, respectively. The overall survival rate of the flap was 100%. Complications were wound dehiscence(5 cases) and ptosis(1 case). We designed multiple dimensionally folded free flap for midfacial reconstruction. For 3-dimensional flap needs, we used latissimus dorsi myocutaneous flap. 2-Dimensional flap was latissimus dorsi or rectus abdominis myocutaneous flap and 1-dimensional flap was radial forearm flap. In this study we produced an algorithm for midfacial reconstruction. Large volume with many skin paddle defects were best reconstructed with latissimus dorsi myocutaneous flap or rectus abdominis myocutaneous flap. Radial forearm flap was used for reconstruction of small volume and little skin paddle defects.

Restoration and Scientific Analysis of Casting Bronze Type in Joseon Dynasty (조선왕실 주조 청동활자의 복원과 과학적 분석)

  • Yun, Yong-Hyun;Cho, Nam-Chul;Lee, Seung-Cheol
    • Journal of Conservation Science
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    • v.25 no.2
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    • pp.207-217
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    • 2009
  • After replicating 10 bronze types such as Gyemija, Gyeongjaja, Eulhaeja, etc. before the Imjin war, we studied the change of microstructure from each casting process, method, and alloy ratio by Gyechukja replicated from "Donggukyeojiseungnam". We selected the average of compositions of Eulhaeja in the National Museum of Korea as the standard(Cu 86.7%, Sn: 9.7%, Pb: 2.3%) of bronze types, so we decided on the alloy's composition of Cu 87%, Sn 15%, Pb 8% added to 5% Sn and Pb contents because of evaporating the Sn and the Pb. Before replicating major metal types, we made master-alloy first, melting it again, and then replicated metal types. The composition of the 1'st replicated Gyechukja showed the range of Cu 85.81~87.63%, Sn 9.27~10.51%, Pb 3.05~3.19%. The 2'nd replicated Gyechukja made using the branch metal left after casting the 1st replica. The 2nd replicated Gyechukja showed the composition range of Cu 87.21~88.09%, Sn 9.06~9.36%, Pb 2.80~3.05%. This result decreases a little contents of Sn and Pb as compared with metal types of the 1st replica. However, it's almost the same as the Eulhaeja's average composition ratio in the National Museum of Korea. As a result of observing the microstructure of restored Gyechukja, it showed the dendrite structure of the typical casting structure and the segregation of Pb. There is no big difference of microstructure between the 1st and the 2nd restored metal types, even though the 2nd restored types partially decreases the eutectoid region in comparison with the 1st types. The systematic and scientific restoration experiment of metal types using Joseon period will be showed the casting method and alloy ratio, and this will be of great help to the study of restoration metal types in the future.

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Optic Nerve Decompression for Traumatic Optic Neuropathy: A Case Report (외상성 시신경병증의 시신경 감압술을 통한 치험례)

  • Hyun, Kyung Bae;Kim, Sun Ho;Choi, Jong Woo;Kim, Yong Oock;Park, Beyoung Yun
    • Archives of Plastic Surgery
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    • v.32 no.3
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    • pp.389-392
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    • 2005
  • A case of visual loss following cranio-maxillofacial trauma is reported. The patient had acute optic nerve injury associated with a fracture of the right zygomaticomaxillary and fronto-naso-ethmoido-orbital bone and epidural hematoma on the right temporal lobe of brain. Bony fragments compressing the optic nerve on lateral side was identified on computed tomography. Decompression of the optic nerve combined with evacuation of epidural hematoma has been performed via transfrontal craniotomy. The patient had complete recovery of visual acuity without any complications. The role of optic nerve decompression in the management of patients with traumatic optic neuropathy is discussed. Surgical indication is controversial and the procedure should be considered only within the context of the specific indication of the individual patient.

Measurement Method of the Masseter Muscle Volume Using 3D Computed Tomography (3D CT를 이용한 교근의 부피측정)

  • Baek, Jung Hwan;Choi, Jong Woo;Yoo, Sun Kuk;Kim, Yong Oock;Park, Beyoung Yun
    • Archives of Plastic Surgery
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    • v.32 no.5
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    • pp.589-592
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    • 2005
  • Since G.N. Hounsfield's clinical use of computed tomography in 1971, digital imaging technique using computers has shown an eye opening progress. Progress has made 3-dimensional understanding of not only facial bones but muscles and other connective tissues possible through 3-dimensional reconstruction of preexisting tomographical images. Also, quantitative analysis of density, distance, volume has become possible, allowing objective analysis of preoperative and postoperative states through imaging. The authors measured the masseter muscle volume of 20 normal individuals and 8 female patients through 3-D reconstructive CT imaging and made a statistical analysis of the measurements. The method used in our study may be applied to the diagnosis of disease causing the change of the facial volume and presurgical design as a useful tool to provide objective information on the evaluation of surgery outcome.

Partial Eyebrow Reconstruction with Bilateral Advancement Flap and Tattooing (양측 전진피판과 문신을 이용한 부분 눈썹 결손의 치험례)

  • Yoon, Jung Ho;Hong, Jong Won;Kim, Young Seok;Roh, Tai Suk;Rah, Dong Kyun
    • Archives of Craniofacial Surgery
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    • v.11 no.1
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    • pp.37-40
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    • 2010
  • Purpose: Reconstruction of eyebrow defects after wide excision of the benign and malignant tumors present a cosmetic challenge to the plastic surgeon. There were several methods for reconstruction of partial eyebrow defect with local flaps except hair bearing composite graft. We introduce simple eyebrow reconstruction with bilateral advancement flap and tattooing on the idea that eyebrow tattooing is popular permanent eyebrow makeup among elderly Korean women. Methods: The flaps were designed on both ends of the eyebrow defect along the upper and lower margin of the eyebrow. Both flaps were cut, undermined and were moved centrally to cover the defect. Both flaps were attached along the vertical suturing line. The rest of each flap was sown with dog-ears revised minimally. Scar lines would be hidden along the natural borders of the eyebrow if possible. The resulting vertical scar finally was covered with hair. After 8 months, eyebrow tattooing would be done to camouflage eyebrow shortening and scar. Results: Partial eyebrow defect was reconstructed successfully with bilateral advancement flap and tattooing. The postoperative scar was inconspicuous and eyebrow looked symmetric. Conclusion: We recommend partial eyebrow reconstruction with bilateral advancement flap and tattooing for the elderly Korean female patients after excision of small tumor in and around eyebrow region.

Transverse Cervical Artery and Appropriate Veins as Recipient Vessels in Head and Neck Reconstruction (두경부재건 시 수용부 혈관으로서 목가로동맥의 유용성과 적절한 정맥의 선택)

  • Lee, Dong Won;Lee, Won Jai;Lew, Dae Hyun;Rah, Dong Kyun;Tark, Kwan Chul
    • Archives of Plastic Surgery
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    • v.35 no.3
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    • pp.283-288
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    • 2008
  • Purpose: The purpose of this study is to evaluate the transverse cervical artery of those who received preoperative radiotherapy or radical neck dissection and those who are unable to utilize the branch of external carotid artery system, which are most commonly used as recipient artery in head and neck reconstruction. Methods: 10 patients were selected as head and neck cancer candidates for study. 8 patients received radical neck dissection or modified radical neck dissection and 3 patients underwent preoperative radiotheraphy. In call cases, reconstruction using free flap was performed with transverse cervical artery as recipient artery and posterolateral cervical vein or transverse cervical vein as recipient vein. Results: Partial necrosis of flap due to wound infection was noted in one case and successful microsurgery was achieved in all other cases. The average pedicle length was 9.3 cm and all arteries underwent end to-end anastomosis. In 7 patients, posterolateral cervical vein was used as recipient artery and transverse cervical vein was utilized in 3 patients. Conclusion: In cases where recipient artery from external carotid system cannot be utilized due to preoperative radiotherapy or radical neck dissection, the transverse cervical artery can be an alternative option of choice. Due to diverse variations of transverse cervical vein as a recipient vein, the posterolateral cervical vein may be considered in such cases.

2D Microwave Image Reconstruction of Breast Cancer Detection for Breast Types (유방 조직형태에 따른 유방암 진단 2차원 마이크로파 영상복원)

  • Kim, Ki-Chai;Kim, Tae-Hong;Lee, Jong-Moon;Jeon, Soon-Ik;Pack, Jeong-Ki
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.27 no.7
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    • pp.646-652
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    • 2016
  • This paper presents a tumor detection for breast cancer that utilizes two-dimensional(2D) image reconstruction with microwave tomographic imaging. The breast cancer detection system under development consists of 16 transmit/receive antennas, and the microwave tomography system operates at 1,700 MHz. The four types of breast(ED-, HD-, SC-, and FT-type) are used for image reconstruction. To solve a 2D inverse scattering problem, the method of moments(MoM) is employed for forward problem solving, and the simplex method employed as an optimization algorithm. The results of the reconstructed image show that the ED- and HD-types of breasts are well reconstructed, but SC- and FT-type breasts are not well because of the error including.

Effect of Human Follicular Fluid and Bovine Oviductal Tissue Extract on the Mouse Oocyte-Cumulus Complex (사람 난포액과 소의 수란관 조직추출액이 생쥐 난구세포에 미치는 영향)

  • 홍민정;김지수;심명선;김해권
    • Development and Reproduction
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    • v.6 no.2
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    • pp.97-104
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    • 2002
  • In most mammals, mature oocyte-cumulus complexer(OCCs) ovulate into the oviduct where fertilization by sperm takes place. However, the complex that fail to fertilize eventually undergoes degeneration while they reside in the oviduct. Yet there is no blown mechanism how both oocyte and cumulus cells degenerate. Using human follicular fluid (hFF), bovine oviductal tissue extract (BOX) and mouse OCC, the present study aimed to find how the oviduct influence the viability of the oocyte and cumulus cells in vitro. There was no difference of oocyte maturation rate between the control and BOX-treated groups. However, there was a significant difference in the survival of cumulus cells between two groups. Cumulus cells cultured in the presence of hFF alone underwent initially expansion and then they formed monolayer in the culture dish. Even after 72 hr, they proliferated well and showed fibroblast-like morphology. Cumulus cells cultured in the presence of both hFF and BOX also expanded after 24 hr, however, after 72 hr culture, they eventually detached and degenerated. Cumulus cells cultured in the BOX alone gave a similar drastic result. When the cumulus cells cultured in the presence of BOX were stained with DAPI, their nuclei showed partial condensation and fragmentation. After detailed analysis of these cells by TUNEL assay, many nuclei of them exhibited well stained spots indicating the signs of apoptosis. Based upon these observations, it is suggested that BOX might possess a factor that leads mouse cumulus cells to undergo apoptosis in vitro.

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Effect of Relaxin Expressing Adenovirus for Rat Skin Flap Viability (Relaxin을 분비하는 아데노바이러스가 피판의 생존에 미치는 영향)

  • Yun, In-Sik;Park, Yong-Sun;Cheon, Young-Woo;Jeon, Yeo-Reum;Lee, Won-Jai;Yun, Chae-Ok;Rah, Dong-Kyun
    • Archives of Plastic Surgery
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    • v.37 no.5
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    • pp.519-525
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    • 2010
  • Purpose: Of various effects of relaxin, we assumed that anti-fibrotic effects, neovascularization effects and vasodilatation effects of relaxin might enhance the survival rate of skin flap. In the current study, we used adenovirus expressing relaxin genes to examine whether these genes could enhance the survival rate of a skin flap. Methods: A total of 30 Sprangue-Dawley rats were divided into three groups: RLX group (10; relaxin virus injected group), CTR group (10; no gene coded virus injection group), and PBS group (10; PBS injected group). Each group was intradermally injected with the virus ($10^7$ PFU) and PBS 48 hours before and immediately before the flap elevation. A distally based flap $3{\times}9\;cm$ in size was elevated on the dorsal aspect of each rat. Following this, a flap was placed in the original location and then sutured using a #4-0 Nylon. A surviving area of the flap was measured and then compared on postoperative days 3, 7 and 10. Using a laser Doppler, the amount of blood flow was measured. On postoperative day 10, tissues were harvested for histologic examination and the number of blood vessels was counted. Results: There was a significant increase in the area of the flap survival in the RLX group on postoperative days 3 and 7. The Doppler measurement also showed significantly increased blood flow immediately after the operation and on postoperative days 7 and 10. The number of blood vessels was significantly greater in the RLX group in the tissue harvested on postoperative day 10. The VEGF concentration was significantly higher in the RLX group than others in the tissues harvested on postoperative day 10. Conclusion: Following an analysis of the effects of relaxin-secreting adenovirus on the survival of a flap, the surviving area of the flap and the blood flow also increased. A histopathology also showed an increase in the number of blood vessels and the concentration of VEGF.