1.Effect of surface treatment on bond strength of porcelain laminate veneer to enamel.
Yong Seok BAN ; Hyun Gon CHUNG ; Soon Ho HONG
The Journal of Korean Academy of Prosthodontics 1991;29(1):255-264
No abstract available.
Dental Enamel*
;
Dental Porcelain*
2.Depression in Parkinsonian patients.
Sung Kil MIN ; Ho Seok LEE ; Sang Sup CHUNG
Journal of Korean Neuropsychiatric Association 1993;32(2):188-194
No abstract available.
Depression*
;
Humans
3.Effects of Power Output and Energy Density on the Histologic Change of Guinea pig Skin Following Copper Vapor Laser Irradiation.
Woo Seok KOH ; Jin Ho CHUNG ; Jai Il YOUN
Korean Journal of Dermatology 1994;32(4):591-598
BACKGROUND: Recentliy copper vapor laser(CVL) has been applied with encouraging results in the treatment of port wine stain. The CVL emits yellow light(578nm) in a sequence of about 10,000 to 15,000 pulses/second(10-15kHz) with a pulse duration of 15-50 cases. One of the basic methods of evaluationg the effects of laser lights is to study histologic changes after laser irradiation. OBJECTIVE: The effects of power output and energy density on the histologic change of guinea pig skin following CVL irradiation was evaluted to suggest a way of deciding parameters of CVL to achieve the best clinical results. METHODS: After setting the power output for one of 0.8W, 1.6W and 2.4W, the laser was irradiated with an energy density of 10, 12, 14, 16, 18, 20J/cm. A biopsy was done 15 minutes after irradiation and the biopsy specimens was stained with H&E and NBTC histocberr ical method. RESULTS: 1. At the power of 0.8W, specimens irradiated with an energy density above 14J/cm showed diffuse nonspecific coagulation necrosis of the epidermis and upper dermis. 2. At the power of 1.6W, specimens irradiated with energy density of 14, 16J/cm showed coagulation necrosis of dermal vessel and perivascular collagen. With energe density of 18, 20J/cm, diffuse nonspecific coagulat,ion necrosis of epidermis and upper dermis were observed. 3. At the power of 2.4W, specimens irradiated with an anergy density of 12, 14, 16, 18J/cm showed coagulation necrosis of the dermal vessel and perivascular collagen. With an energy density of 20J/cm, diffuse nonspecific coagulation necrosis of the epidermis and upper dermis was observed. CONCLUSIONS : With the above results it was found that t,he higher power output of CVL enlarged the range of energy density confining thermal damage to the dermal v-ssels and perivascular collagen. Additionally the higher power raised the upper limit of energy density with which t,he epidermis was viable.
Animals
;
Biopsy
;
Collagen
;
Copper*
;
Dermis
;
Epidermis
;
Guinea Pigs*
;
Guinea*
;
Herpes Zoster
;
Humans
;
Inpatients
;
Lasers, Gas*
;
Necrosis
;
Port-Wine Stain
;
Skin*
4.Effects of Power Output and Energy Density on the Histologic Change of Guinea pig Skin Following Copper Vapor Laser Irradiation.
Woo Seok KOH ; Jin Ho CHUNG ; Jai Il YOUN
Korean Journal of Dermatology 1994;32(4):591-598
BACKGROUND: Recentliy copper vapor laser(CVL) has been applied with encouraging results in the treatment of port wine stain. The CVL emits yellow light(578nm) in a sequence of about 10,000 to 15,000 pulses/second(10-15kHz) with a pulse duration of 15-50 cases. One of the basic methods of evaluationg the effects of laser lights is to study histologic changes after laser irradiation. OBJECTIVE: The effects of power output and energy density on the histologic change of guinea pig skin following CVL irradiation was evaluted to suggest a way of deciding parameters of CVL to achieve the best clinical results. METHODS: After setting the power output for one of 0.8W, 1.6W and 2.4W, the laser was irradiated with an energy density of 10, 12, 14, 16, 18, 20J/cm. A biopsy was done 15 minutes after irradiation and the biopsy specimens was stained with H&E and NBTC histocberr ical method. RESULTS: 1. At the power of 0.8W, specimens irradiated with an energy density above 14J/cm showed diffuse nonspecific coagulation necrosis of the epidermis and upper dermis. 2. At the power of 1.6W, specimens irradiated with energy density of 14, 16J/cm showed coagulation necrosis of dermal vessel and perivascular collagen. With energe density of 18, 20J/cm, diffuse nonspecific coagulat,ion necrosis of epidermis and upper dermis were observed. 3. At the power of 2.4W, specimens irradiated with an anergy density of 12, 14, 16, 18J/cm showed coagulation necrosis of the dermal vessel and perivascular collagen. With an energy density of 20J/cm, diffuse nonspecific coagulation necrosis of the epidermis and upper dermis was observed. CONCLUSIONS : With the above results it was found that t,he higher power output of CVL enlarged the range of energy density confining thermal damage to the dermal v-ssels and perivascular collagen. Additionally the higher power raised the upper limit of energy density with which t,he epidermis was viable.
Animals
;
Biopsy
;
Collagen
;
Copper*
;
Dermis
;
Epidermis
;
Guinea Pigs*
;
Guinea*
;
Herpes Zoster
;
Humans
;
Inpatients
;
Lasers, Gas*
;
Necrosis
;
Port-Wine Stain
;
Skin*
5.Coexistence of Bullous Pemphigoid and Psoriasis: A Case Report and Review of the Literature.
Seok Beom PARK ; Jin Ho CHUNG ; Jai il YOUN
Annals of Dermatology 1999;11(1):23-26
There have been several reports in the literature of coexistent psoriasis and bullous pemphigoid. In most cases, the bullous pemphigoid lesions have been considered to be induced by antipsoriatic treatments. We describe a patient with psoriasis in whom bullous pemphigoid developed during psoriasis treatment, but the exact etiologic factor was not identified. Recently, some reports have suggested that an immunologic or biochemical association between the two diseases plays a role in the pathogenesis.
Humans
;
Pemphigoid, Bullous*
;
Psoriasis*
6.A Clinical Analysis of Pediatric Cardiopulmonary Resuscitation.
Sang Weon CHUNG ; Sung Pil CHUNG ; Sung Wook CHOI ; Seok Joon CHANG ; Seung Ho KIM
Journal of the Korean Society of Emergency Medicine 1997;8(3):347-352
BACKGROUND: The pediatric CPR is rather uncommon practice than adult CPR in emergency room. Therefore, few interest and studies were focused in pediatric CPR. The object of this study is to make an analysis about pediatric CPR performed within hospital setting. METHOD: From January 1. 1990 to December 31. 1996, a total of 59 patients, less than 15-year-old, who received cardiopulmonary resuscitation were subject of this study. The study was done retrospective chart analysis for sex, age, weight, the place of cardiac arrest, initial EKG rhythms, endotracheal tube size, the causes of arrest, CPR time, ROSC, the amount and types of CPR drugs used during resuscitation. Wilcoxon rank sum test and chi2 test were used to compare the dose of drugs during CPR in each group. RESULTS: There were no statistical difference between ROSC and non-ROSC group in place of arrest, initial EKG rhythms, CPR time, dosage of CPR drugs. CONCLUSION: The uniform reporting guideline of pediatric advanced life support should be used for future pediatric CPR study, such as Utstein style guideline in pediatric CPR.
Adolescent
;
Adult
;
Cardiopulmonary Resuscitation*
;
Electrocardiography
;
Emergency Service, Hospital
;
Heart Arrest
;
Humans
;
Resuscitation
;
Retrospective Studies
7.Compostion of Triglycerides of Sebaceous Glands in Patients with Osmidrosis and Hyperhidrotic Patients.
Dae Sik SEOK ; Joon Young SONG ; Chung Chul KIM ; Tao Ho CHUNG
Korean Journal of Dermatology 1985;23(3):355-360
The composition of triglycerides of the axillary sebaceous glands in 10 patient, with osmidrosis and 10 patients with hyperhidrosis was analyzed by high pressure liquid chromatography. Sebaceous glands were isolated and dissected by Kellum's method, and lipids were extracted by Folchs method. Individual triglycerides were separated by high pressure liquid chromatography and fatty acid composition of triglycerides was analyzed by gas-liquid chromatography. A number of individual triglycerides were identified: Fraction 1 consisted of dimyristoarachidonin, dilinoleioarachidonin, and myristol inoleioarachidonin, fraction 2 was trilinolein, fraction 3 was dilinoleioolein, fraction 4 was dilinoleiopalmitin, fraction 5 consisted of dioleiolinolein, dipalmitolinoleiri, and palmitooleilinolein. In osmidrosis patients, cornpositions of fraction 1, 2, 3, 4, and 5 were 5, 4%. 18.5% 29.5% 32.0% 14.1% of total triglycerides, respectively. In hyperhidrosis patients, cornpositions of fraction 1, 2, '3, 4, and 5 were,5, 9%, 20. 6%, 30. 9% 32. 1%, 14. 5% of total triglycericles, resectively. There were no differences in composition of triglycerides of sekaceous glands between osmidrosis patients and hyperhidrosis patients and hyperhi.frosis patients.
Chromatography, Gas
;
Chromatography, Liquid
;
Humans
;
Hyperhidrosis
;
Sebaceous Glands*
;
Soil*
;
Triglycerides*
8.Inhibition of Contact Hypersensitivity by PUVA Treatment.
Sung Ho BAE ; Yun Shin CHUNG ; Seok Don PARK ; Hyang Suk YOON ; Hun Taeg CHUNG
Annals of Dermatology 1990;2(1):1-8
Normal C3WHeN strain mice exposed to topical 8inethoxypsomlen plus long wave ultraviolet (PUVA) showed a reduction in contact hypersensitivity, (CH) which was localized to the skin in the area of PUVA treatment (local suppression), whereas systemic PUVA treatment caused diffuse suppression of CH reaction, regardless of the application site of 2,4-dinitro-1-fluorobenzene (DNFB). There seem to be two different mechanisms responsible for CH reduction by PUVA. Local suppression by topical PUVA treatment was thought to be a result of blocking the afferent phase of immune response, it was associated with a lack of CH effector cells in the peripheral lymph nodes and could not be reversed by indomethacin treatment. Diffuse suppression induced by systemic PUVA treatment seemed to be associated with blocking of egress of effector cells from the regional lymph nodes, this depressed CH response was prevented when indomethacin was administered before PUVA treatment.
Animals
;
Dermatitis, Contact*
;
Indomethacin
;
Lymph Nodes
;
Mice
;
Skin
10.A Case of Acute Rhenmatic Fever Associated with Acute Poststreptococcal Glomerulonepheitis.
Ho Kyung CHOI ; Dong Seok CHOI ; Jae Ho LEE ; Young Hun CHUNG ; Hyon Soon LEE
Journal of the Korean Pediatric Society 1989;32(12):1744-1748
No abstract available.
Fever*