1.Change of Longitudinal Axis of Radius and Ulna in Cubitus Varus Deformity.
In Young OK ; In Tak CHU ; Kwang Jae RYU
The Journal of the Korean Orthopaedic Association 1997;32(1):101-106
Cubitus varus, which includes deformities of varus, hyperextension and internal rotation, is the most common complication of supracondylar fracture of the humerus in children. For correction of cubitus varus deformity, many operative methods have been reported but postoperative results are not always satifactory. For the purpose of detection of the reason of postoperative residual deformity, we reviewed AP roentgenography of 22 patients of cubitus varus deformity in the view point that change of longitudinal axis of forearm contribute the residual deformity. The results are summerized as follows: 1. Degree of cubitus varus deformity was more severe in the patients whose interval between the injured time and visiting hospital for cubitus varus was longer. 2. Average proximal radial shaft angle was 10.99degrees +/-3.48degrees in normal limb and 15.72degrees+/-4.03degrees in affected limb and average ulnar shaft angle was 7.86degrees+/-3.60degrees, 10.54degrees +/-4.02degrees (P<0.05), respectively which were all significant value statistically (P<0.05). Average distal radial shaft angle was 10.21degrees 2.37 in normal limb and 11.21degrees +/-1.51degrees in affected limb and statistically insignificant (P>0.05). 3. More severe cubitus varus deformity revealed more change of proximal radial shaft angle of attected limb compare to normal limb. Based on these results, we concluded that correction of the cubitus varus deformity should not be delayed in order to minimize the secondary change of longitudinal axis of foream bones and to obtain satisfacotry cosmetic outcome.
Axis, Cervical Vertebra*
;
Child
;
Congenital Abnormalities*
;
Extremities
;
Forearm
;
Humans
;
Humerus
;
Radiography
;
Radius*
;
Ulna*
2.Fracture of the Capitellum Humeri: A report of two cases.
Young Bok JUNG ; Jae Kwang YUM ; Young Jae BAE ; Ho Sung RYU ; Tae Yeul YOO
The Journal of the Korean Orthopaedic Association 1998;33(6):1607-1610
Fractures of the capitellum humeri are rare and the recommendations for treatment vary. It can involve a significant portion of the articular surface, rendering the elbow joint unstable. In this situation, it is desirable to reduce and internally fix the capitellar fragment, because this restores the articular surface and augments joint stability. We experienced two cases of capitellar fractures which one case was spontaneously anatomical reduced and the other case was treated by open reduction. In one case the capitellar fragment was spontaneous reduced to a stable position although it was noticed radiographically as an unstable displaced fracture preoperatively. The other case was treated by open reduction and internal fixation with 3.5mm, small, AO, cannulated screw and K-wire. Both cases are reported here with references.
Elbow Joint
;
Joints
3.The Production and Evaluation of the Tissue-equivalent Phantom for the Magnetic Resonance Imaging.
Young Hoon RYU ; Jae Hyun CHO ; Jin Suck SUH ; Jae Myun LEE ; Eun Kee JEONG
Journal of the Korean Radiological Society 1994;30(6):1151-1155
PURPOSE: For the production and evaluation of the tissue-equivalent phantom. MATERIALS AND METHODS: We used agarous gel and oil as a basic component of the mixture and added Tween 80 for the stabilization of phantoms. We did the test for homogeneity and measured T1 and T2 relexation times of each phantom tube. RESULTS: T1 relaxation time ranged from 642 to 2781 msec and T2 relaxation times from 42 to 157 msec. Each phantom was significantly different in T1 relaxation time and T2 relaxation time (p < .0001). CONCLUSION: Tissue equivalent phantom may provide good information on the optimal sequence before MR imaging of patients and may be valuable if it is used with the patients' MR imaging.
Agar
;
Humans
;
Magnetic Resonance Imaging*
;
Polysorbates
;
Relaxation
4.Excretory-Secretory Products of Trichomonas vaginalis Cause Apoptosis in Mouse Sperm in Vitro
Jihyun KEUM ; Jaesook ROH ; Jae-Sook RYU ; Ki-Young RYU
The Korean Journal of Parasitology 2022;60(5):357-360
Excretory-secretory products (ESP) of T. vaginalis have been shown to inhibit sperm motility, viability, and functional integrity, leading to a decreased fertilization rate in vitro. This study investigated whether T. vaginalis induce apoptosis and ultrastructural changes of sperm using flow cytometry and electron microscopy. Incubation of sperm with T. vaginalis ESP increased phosphatidylserine externalization and DNA fragmentation, and decreased mitochondrial membrane potential. Transmission electron microscopy of sperm incubated with ESP revealed abnormal features such as distorted heads, broken necks, and acrosomes exocytosis. This is the first report that demonstrates a direct impact of T. vaginalis ESP on sperm apoptosis and architecture in vitro.
5.Usefulness of acellular dermal matrix graft on the tissue regeneration in rabbits.
Jong Hak CHOI ; Jae Young RYU ; Sun Youl RYU
Journal of the Korean Association of Oral and Maxillofacial Surgeons 2008;34(2):220-229
PURPOSE: The present study was aimed to examine the effect of acellular dermal matrix (AlloDerm(R)) grafted to the experimental tissue defect on tissue regeneration. MATERIALS AND METHODS: Male albino rabbits were used. Soft tissue defects were prepared in the external abdominal oblique muscle. The animals were then divided into 3 groups by the graft material used: no graft, autogenous dermis graft, and AlloDerm(R) graft. The healing sites were histologically examined at weeks 4 and 8 after the graft. In another series, critical sized defects with 8-mm diameter were prepared in the right and left iliac bones. The animals were then divided into 5 groups: no graft, grafted with autogenous iliac bone, AlloDerm(R) graft, AlloDerm(R) graft impregnated with rhBMP-2, and AlloDerm(R) graft with rhTGF-beta(1). The healing sites of bone defect were investigated with radiologic densitometry and histological evaluation at weeks 4 and 8 after the graft. RESULTS: In the soft tissue defect, normal healing was seen in the group of no graft. Inflammatory cells and foreign body reactions were observed in the group of autogenous dermis graft, and the migration of fibroblasts and the formation of vessels into the collagen fibers were observed in the group of AlloDerm(R) graft. In the bone defect, the site of bone defect was healed by fibrous tissues in the group of no graft. The marked radiopacity and good regeneration were seen in the group of autogenous bone graft. There remained the traces of AlloDerm(R) with no satisfactory results in the group of AlloDerm(R) graft. In the groups of the AlloDerm(R) graft with rhBMP-2 or rhTGF-beta(1), there were numerous osteoblasts in the boundary of the adjacent bone which was closely approximated to the AlloDerm(R) with regeneration features. However, the fibrous capsule also remained as in the group of AlloDerm(R) graft, which separated the AlloDerm(R) and the adjacent bone. CONCLUSIONS: These results suggest that AlloDerm(R) can be useful to substitute the autogenous dermis in the soft tissue defect. However, it may not be useful as a bone graft material or a carrier, since the bone defect was not completely healed by the bony tissue, regardless of the presence of osteogenic factors like rhBMP-2 or rhTGF-beta(1).
Acellular Dermis
;
Animals
;
Collagen
;
Densitometry
;
Dermis
;
Durapatite
;
Fibroblasts
;
Foreign Bodies
;
Humans
;
Male
;
Muscles
;
Osteoblasts
;
Rabbits
;
Regeneration
;
Transplants
6.Usefulness of acellular dermal matrix graft on the tissue regeneration in rabbits.
Jong Hak CHOI ; Jae Young RYU ; Sun Youl RYU
Journal of the Korean Association of Oral and Maxillofacial Surgeons 2008;34(2):220-229
PURPOSE: The present study was aimed to examine the effect of acellular dermal matrix (AlloDerm(R)) grafted to the experimental tissue defect on tissue regeneration. MATERIALS AND METHODS: Male albino rabbits were used. Soft tissue defects were prepared in the external abdominal oblique muscle. The animals were then divided into 3 groups by the graft material used: no graft, autogenous dermis graft, and AlloDerm(R) graft. The healing sites were histologically examined at weeks 4 and 8 after the graft. In another series, critical sized defects with 8-mm diameter were prepared in the right and left iliac bones. The animals were then divided into 5 groups: no graft, grafted with autogenous iliac bone, AlloDerm(R) graft, AlloDerm(R) graft impregnated with rhBMP-2, and AlloDerm(R) graft with rhTGF-beta(1). The healing sites of bone defect were investigated with radiologic densitometry and histological evaluation at weeks 4 and 8 after the graft. RESULTS: In the soft tissue defect, normal healing was seen in the group of no graft. Inflammatory cells and foreign body reactions were observed in the group of autogenous dermis graft, and the migration of fibroblasts and the formation of vessels into the collagen fibers were observed in the group of AlloDerm(R) graft. In the bone defect, the site of bone defect was healed by fibrous tissues in the group of no graft. The marked radiopacity and good regeneration were seen in the group of autogenous bone graft. There remained the traces of AlloDerm(R) with no satisfactory results in the group of AlloDerm(R) graft. In the groups of the AlloDerm(R) graft with rhBMP-2 or rhTGF-beta(1), there were numerous osteoblasts in the boundary of the adjacent bone which was closely approximated to the AlloDerm(R) with regeneration features. However, the fibrous capsule also remained as in the group of AlloDerm(R) graft, which separated the AlloDerm(R) and the adjacent bone. CONCLUSIONS: These results suggest that AlloDerm(R) can be useful to substitute the autogenous dermis in the soft tissue defect. However, it may not be useful as a bone graft material or a carrier, since the bone defect was not completely healed by the bony tissue, regardless of the presence of osteogenic factors like rhBMP-2 or rhTGF-beta(1).
Acellular Dermis
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Animals
;
Collagen
;
Densitometry
;
Dermis
;
Durapatite
;
Fibroblasts
;
Foreign Bodies
;
Humans
;
Male
;
Muscles
;
Osteoblasts
;
Rabbits
;
Regeneration
;
Transplants
8.An experimental study and case analysis of acellular dermal matrix implantation for restoration of soft tissue defects
Journal of the Korean Association of Maxillofacial Plastic and Reconstructive Surgeons 2008;30(1):1-10
Absorption
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Acellular Dermis
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Congenital Abnormalities
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Dermis
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Dislocations
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Ear
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Fascia
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Fibroblasts
;
Humans
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Inflammation
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Muscles
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Nose
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Rabbits
;
Rejection (Psychology)
;
Skin
;
Transplants
9.Healing patterns of the acellular dermal matrix depend on graft method in the rabbit ears
Journal of the Korean Association of Maxillofacial Plastic and Reconstructive Surgeons 2009;31(3):216-221
Acellular Dermis
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Basement Membrane
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Ear
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Inflammation
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Light
;
Microscopy
;
Rabbits
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Retention (Psychology)
;
Skin
;
Transplants
;
Wound Healing
10.A human infection of Echinostoma hortense in duodenal bulb diagnosed by endoscopy.
Young Doo CHANG ; Woon Mok SOHN ; Jae Hwa RYU ; Shin Yong KANG ; Sung Jong HONG
The Korean Journal of Parasitology 2005;43(2):57-60
As gastroduodenoscopy performed more frequently, case reports of human echinostomiasis are increasing in Korea. A Korean woman presented at a local clinic with complaints of abdominal pain and discomfort that had persisted for 2 weeks. Under gastroduodenoscopy, two motile flukes were found attached on the duodenal bulb, and retrieved with endoscopic forceps. She had history of eating raw frog meat. The two flukes were identified as Echinostoma hortense by egg morphology, 27 collar spines with 4 end-group spines, and surface ultrastructural characters. This report may prove frogs to be a source of human echinostome infections.
Animals
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Duodenal Diseases/*parasitology
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Duodenum/*parasitology
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Echinostoma/*isolation & purification
;
Echinostomiasis/*diagnosis
;
Endoscopy
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Female
;
Humans
;
Korea
;
Middle Aged