Local anesthetics produce pain during infiltration into skin. The relationship between local anesthetic-induced pain and pH of the local anesthetic solution has not been fully investigated. Commercial preparation of local anesthetics are prepared as acidic solutions of the salts to promote solubility and stability. And the acidity of local anesthetic solition may be related with the pain during infiltration of the solutione. So, we tried to neutralize the lidocaine hydrochloride solution which is one of the most frequently used local anesthetic agent. Sodium bicarbonate was used for neutralization. Sodium bicarbonate was mixed with lidocaine hydrochloride until the resulting pH of the solution become 7.4 which is identical to the acidity of body fluid. To identify the effect of neutralized lidocaine solution, we had a course of double blind test to 6 volunteers. Both forearm of each volunteer were injected with neutralized lidocaine and plain one and the degree of pain was estimated by each volunteers. According to subjective description by the volinteers, everyone felt neutralized lidocaine injection site was less painful than plain lidocaine. We concluded that we could reduce pain from infiltration of lidocaine hydrochloride by neutralization of the anesthetic solution with sodium bicarbonate.
Anesthetics, Local ; Body Fluids ; Forearm ; Hydrogen-Ion Concentration ; Lidocaine* ; Salts ; Skin ; Sodium Bicarbonate ; Solubility ; Volunteers

No abstract available.
Cell Proliferation* ; Cytomegalovirus* ; Humans*

Paget's disease is classified, according to location, as mammary or extramammary disease. Extramammary Paget's disease especially in the vulva is extremely rare. Several hundred cases have been described worldwide. Patients with Paget's disease of the vulva are usually white and postmenopausal. The cause of which remains elusive. A case of vulva Paget's disease is presented with brief review of literature.
Humans ; Paget Disease, Extramammary ; Vulva

No abstract available.
Bartter Syndrome*

OBJECTIVE: To evaluate whether the rate of early mouse embryonal development could be enhanced by cumulus cell coculture in vitro. METHODS: Ham's F-10 culture media supplemented with 0.4% bovine serum albumin were used. Two-cell F1 mouse embryos were cultured in media with or without cumulus cells of female ICR mouse embryo for 96 hours, and the rates of embryonal development were observed and compared. RESULTS: The percentage of hatched blastocyst in the coculture group was significantly higher than that in the control group by 87.3% vs 64.8% respectively (p< 0.05). CONCLUSION: This study provides confirmative information that cumulus cell coculture will be useful in enhancing early mouse embryonal development.
Animals ; Blastocyst ; Coculture Techniques* ; Culture Media ; Cumulus Cells* ; Embryonic Structures ; Female ; Humans ; Mice* ; Mice, Inbred ICR ; Serum Albumin, Bovine

No abstract available.
Biopsy* ; Child* ; Humans

The ideal restorative material should mimic the properties of the tissues it replaces. Dental composite resins have been used widely as restorative materials due to its advantages such as excellent esthetics and ease of manipulation. But inadequate wear resistance has been a major factor limiting the use of composite restorative materials. Improved manufacturing techniques have allowed the development of hybrid composites, with a greater percentage volume filler loading, which have improved physical an mechanical properties. However they are lacking the study wear resistance. The purpose of this study was to evaluate the wear of human enamel against ceromer by the use of a pin-on-disk type wear testers. Discs of ceromer(Targis : Ivoclar, Vivadent, Amherst. NY) and discs of type III gold alloy as a control were used for test specimens. Intact cusp of premolar and molar were used for enamel specimens. The wear of enamel was determined by weighing the cusp before and after each test, and the weight converted to volumes by average density of enamel. Surface profilometer was used to quantify wear of the ceromer and gold specimens. Vicker's hardness tester was used to evaluate the surface hardness of test specimens. The SEM was used to evaluate the wear surfaces. The results were as follows; 1. Ceromer produced less enamel wear than gold(p<0.05). 2. The wear volume of ceromer was greater than that of gold(p<0.01). 3. The hardess of ceromer was lower than that of gold, but there was no correlation between the hardness and wear of the ceromer and gold. 4. SEM analysis revealed that there were many voids and microcracks in the wear tract of ceromer. in gold group, many minute V-shaped grooves were examined.
Alloys ; Bicuspid ; Composite Resins ; Dental Enamel* ; Esthetics ; Hardness ; Hardness Tests ; Humans* ; Molar

No abstract available.
Animals ; Cyclophosphamide* ; Food Deprivation* ; Mice*

No abstract available.
Animals ; Cyclophosphamide* ; Food Deprivation* ; Mice*

Fifty-six patients with tinea versicolor were studied clinically and therapeutically, from July 1984 to August 1985, at the Department of Dermatology, Hanyang University. L atients were treated with 20g sodium thiosulfate solution, 1g isoconazole nitrate cream, lg bifonazole cream and. oral ketoconazole. The result obtained were as follows: 1. The average age of all patients at visit was RO. 1 years, the oldest patient was 72 year-old and the youngest patient was 13 year-old. The male to female ratio was 3. 7: 1. 2. Distribution of lesions were anterior chest(26.8%), back(23.9%), abdomen (19%), axilla (17%), neck(6. 3%), pubic area(4. 2%), upper extremities(1. 4%), hip(0.7%) and lower extremities(0.7%). The incidence of hyperpigmented lesions was 76. 8%, and that of hypopigmented lesions was 23. 2g. 3. Average of treatment duration in each trial group indicated 3. 71-I--0 83 weeks (M+SD) in 20g sodium thiosulfate regimen group, 3. 07+ 0. 73 weeks in 1g isoconazole nitrate, 3.29+1.14 weeks in bifonazole, R. 00+0. 68 weeks in oral ketoconazole. No treatment results show statistically significant differences among the trial groups.
Abdomen ; Adolescent ; Aged ; Axilla ; Dermatology ; Female ; Humans ; Incidence ; Ketoconazole ; Male ; Sodium ; Tinea Versicolor* ; Tinea*