• Journal of Korean Neurosurgical Society
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• v.48 no.2
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• pp.177-180
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• 2010

Giant serpentine aneurysms are rare and have distinct angiographic findings. The rarity, large size, complex anatomy and hemodynamic characteristics of giant serpentine aneurysms make treatment difficult. We report a case of a giant serpentine aneurysm of the right middle cerebral artery (MCA) that presented as headache. Treatment involved a superficial temporal artery (STA)-MCA bypass followed by aneurysm resection. The patient was discharged without neurological deficits, and early and late follow-up angiography disclosed successful removal of the aneurysm and a patent bypass graft. We conclude that STA-MCA bypass and aneurysm excision is a successful treatment method for a giant serpentine aneurysm.

• Journal of Veterinary Clinics
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• v.16 no.2
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• pp.478-481
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• 1999

A 8 years old male Pomeranian weighing 4 kg was referred because of coughing of 4 months' duration. Heart sounds and cardiac apex beat were showed more intense on the right side. On radiographic views, loss of normal line of the diaphragm, gas-containing intestines and stomach in thoracic cavity, and right displacement of heart were observed. Ultrasonography revealed that liver located adjacent to the heart. Although the dog died due to severe respiratory disorder in surgical procedure, in thoracic and abdominal surgery, a large defect was found in the left and right ventral muscular portion and left central tendon of the diaphragm, extending from the esophageal hiatus to rib. Left and right cranial lobe of liver, small intestines, stomach and spleen were herniated in the thoracic cavity. Because of the size and chronicity of the defect in the diaphragm, closure was impossible with an abdominal muscle graft.

• Archives of Plastic Surgery
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• v.33 no.2
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• pp.252-254
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• 2006

The dermoid cyst is the one of common space occupying orbital lesion. This lesion is regarded as a non-invasive tumor, but infrequently causes destruction of adjacent bony structure and displacement of adjacent tissue. We experienced a characteristic ovoid orbital dermoid cyst that occupied in the frontal sinus and causes displacement of the eyeball with well-defined lining. This 55-year-old male presented a mass in left orbit, which rapidly increased in size for past 12 months, and patient could not open left eyelid. We removed this tumor totally then reconstructed the orbital roof and frontal sinus with an iliac bone graft and polyethylene sheet(Medpor Newnan, USA). This patient was followed up for 12 months and patient obtained satisfactory result without any complication suck as recurrence or infection.

• Elastomers and Composites
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• v.29 no.1
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• pp.9-17
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• 1994

Methylmetharylate grafted latex(MGL) was prepared by emulsion graft copolymerization of methyl methacrylate onto natural rubber latex(NRL) by using t-butyl hydroperoxide and tetraethylene pentamine in an aqueous medium. Blending of MGL and NRL with different mixing ratio carried out and viscosity and particle size distribution of blend latex were determined. It was found that the optimum condition of mature time, vulcanizing temperature and time for preparation of blend latex films were investigated. latex films prepared by dipping process were meaured. As the reuslt, blend latex(NR-d-MG) films obtained from two-dipping system were more excellent than NR and MG film obtained from one-dipping system.

• Journal of Korean Foot and Ankle Society
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• v.19 no.1
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• pp.7-10
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• 2015

Microfracture as a reparative strategy is the treatment of choice for an osteochondral lesion of talus. Although the results of microfracture are generally excellent, at least 30% of patients who received microfracture have acute or chronic ankle pain with several or unknown causes. The most important factor for unsatisfactory outcome after microfracture is the size of the lesion. For failed osteochondral lesion of talus, the second options are autologous osteochondral graft, autologous chondrocyte implantation, or re-microfracture. In this article, we present the autologous chondrocyte implantation as a second procedure for failed microfracture and compare its clinical outcome with other methods based on a literature review.

• Proceedings of the KOSOMBE Conference
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• v.1996 no.05
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• pp.130-132
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• 1996

It is well known when porous calcium phosphate ceramics are used as a bone graft substitute, new tissues or blood vessels are grown into the porous implant due to their excellent biocompatibility. In this study, the ${\beta}$-crystalline form of calcium metaphosphate, $Ca(PO_{3})_{2}$ is prepared by the controlled thermolysis of monocalcium phosphate, $Ca(H_{2}PO_{4})_{2}$. The diameter of cylindrical pores formed during cooling was controlled by a holding time at the melting point of a monocalcium phosphate and by the change of a recrystallization temperature, to obtained the most appropriate size (about $200{\mu}m$) of pores. It was observed that the increasing holding time at the melting point of monocalcium phosphate results in the decreases of pore sizes.

• Archives of Craniofacial Surgery
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• v.23 no.3
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• pp.134-138
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• 2022

The scalp is the thickest skin in the body and protects the intracranial structures. The coverage of a large scalp defect is a difficult surgical procedure, the full details of which must be considered prior to the procedure, such as defect size and depth, and various factors related to the patient's general condition. Although a free flap is the recommended surgical procedure to cover large scalp defects, it is a high-risk operation that is not appropriate for all patients. As such, other surgical options must be explored. We present the case of a patient with an ulcer on the scalp after wide excision and split-thickness skin graft for squamous cell cancer. We successfully performed a reverse temporalis muscle flap for this patient.

• Journal of the Korean Arthroscopy Society
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• v.5 no.2
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• pp.99-103
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• 2001

Purpose : The purpose of this prospective study was to evaluate second look arthroscopic finding after osteochondral autograft transfer(OAT) for the treatment of the chondral defect of the knee. Materials & Methods : Fourteen out of forty cases underwent second look arthroscopy after the OAT for the treatment of the chondral defect of the knee. The average age of patients was 34 years. Preoperatively, magnetic resonance imaging was performed in eleven cases and chondral defect was confirmed in nine cases. The site of the chondral defect located at medial femoral condyle at seven, trochlea in four, and lateral fomoral condyle in three cases. The average size of the condral defect was $13\times10mm$, maximum $22\times20mm$. The number of graft was one in eight, two in three, three in two, and five in one case. The average follow-up period was twenty-one months. Second look arthroscopy was performed at six months in almost cases. Results : After the OAT, $86\%$ of cases showed that the consistency of grafted cartilage was firm and $93\%$ of cases showed that grafted cartilage was well incorporated with surrounding cartilage. Conclusion : The results of this study suggest that OAT can be one of treatment modality in the chondral defect of the knee.

• Journal of Periodontal and Implant Science
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• v.24 no.3
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• pp.671-689
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• 1994

The purpose of this study was to compare effects of various bone grafts on periodontal regeneration of alveolar bone defects in dogs. Seven adult dogs aged 12 to 18 months were used in this study. Experimental alveolar bone defects were created surgically with a #1/2 round bur at the furcation area of the buccal surface of the mandibular 3rd, 4th premolars and 1st molar. Each experimental alveolar bone defects were grafted with dense hydroxyapatite, natural coral, and decalcified freeze-dried bone, and respectively divided into DHA, NC, DFDB group. An area without bone graft was divided into control group. At 1,2,4,6, and 12 weeks, dogs were serially sacrificed and specimens were prepared with Hematoxylin-Eosin stain and Mallory stain for light microscopic evaluation. The results of this study were as follows : 1. In control group, the matrix change of granulation tissue was observed at 1 week. And in experimental groups, the appearance of connective tissue around graft materials was loosely formed at 1 week, but densely formed at 2 weeks. 2. In every group, the slight formation of new trabecular bone was seen from remaining bone at 1 week. 3. The DHA and NC particles were gradually encapsulated by new trabecular bone from remaining bone, and the osteoid tissue was directly induced from DFDB particles. 4. The presence of osteoblasts was first observed at 1 week in control group and at 2 weeks in NC group, but at 6 weeks in DHA group. 5. In DHA group, the resorption of particles was not observed until 12 weeks. But in NC and DFDB group, the particles were resorbed at 6 weeks and replaced by new bone. And the amount and size of particles were reduced, and their border represented irregular form. In summary, in three experimental groups the inflammatory or foreign body reaction were slight, but the regeneration of new osteoid tissue and the matrix change of dense connective tissue fiber were observed. Especially, NC and DFDB materials were considered as the biocompatible graft materials which were effective in the regenertion of new bone.

• Archives of Plastic Surgery
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• v.39 no.5
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• pp.477-482
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• 2012

Background The bone graft for the alveolar cleft has been accepted as one of the essential treatments for cleft lip patients. Precise preoperative measurement of the architecture and size of the bone defect in alveolar cleft has been considered helpful for increasing the success rate of bone grafting because those features may vary with the cleft type. Recently, some studies have reported on the usefulness of three-dimensional (3D) computed tomography (CT) assessment of alveolar bone defect; however, no study on the possible implication of the cleft type on the difference between the presumed and actual value has been conducted yet. We aimed to evaluate the clinical predictability of such measurement using 3D CT assessment according to the cleft type. Methods The study consisted of 47 pediatric patients. The subjects were divided according to the cleft type. CT was performed before the graft operation and assessed using image analysis software. The statistical significance of the difference between the preoperative estimation and intraoperative measurement was analyzed. Results The difference between the preoperative and intraoperative values were $-0.1{\pm}0.3cm^3$ (P=0.084). There was no significant intergroup difference, but the groups with a cleft palate showed a significant difference of $-0.2{\pm}0.3cm^3$ (P<0.05). Conclusions Assessment of the alveolar cleft volume using 3D CT scan data and image analysis software can help in selecting the optimal graft procedure and extracting the correct volume of cancellous bone for grafting. Considering the cleft type, it would be helpful to extract an additional volume of $0.2cm^3$ in the presence of a cleft palate.