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.
Abdominoplasty*

An axial-pattern flap can be transferred as the free-flap and has many merits over a random-pattern local flap. However, this has limitations of available vascular architecture and donor site. To overcome these problems, many types of prefabricated flaps have been designed using vascular bundles. It is possible to convert a random-pattern flap to a neovascularized axial-pattern flap by transferring a vascular pedicle. In an attempt to study the effects of prefabrication using vascular bundles, the survival rate between random-pattern flap and prefabricated axial-pattern flap was compared in this study. The rabbits were divided into two groups. The control group was consisted of the random-pattern flap and the prefabricated group was consisted of the prefabricated axial-pattern flap using femoral vascular pericles of rabbits. Femoral vascular pedicles were transferred under the 5x5cm lower abdominal flaps without any perivascular tissue. Three weeks later, random-pattern flaps were elevated without any axial vascular pedicle and prefabricated flaps were elevated based on the transferred femoral vascular pericles. The survival rate of the flaps in the control group and experimental group was 67.37% and 98.87% respectively. Based on the result of t-test there was significant difference between two groups. According to these results, it is concluded that prefabricated flap using transferred vascular pedicle was more effective than random-pattern flap. We think that this technique is versatile for wound repair and for use in other aspects of plastic and reconstructive surgery.
Humans ; Plastics ; Rabbits* ; Survival Rate ; Tissue Donors ; Wounds and Injuries

Augumentation rhinoplasty using autogenous cranial bone graft (outer table) can be used more successfully than other methods. In patients with congenital or posttraumatic severe saddle nose deformity and lateral deviation, cranial bone graft is an excellent method of augumentation. The advantages of cranial bone graft compared with traditional method of bone graft are summarized as follows; 1. Easy to reach donor site 2. Abundance of material 3. Little pain and functional disability 4. Shorter hospitalization period 5. Inconspicuous donor scar 6. No secondary deformity of donor site 7.Appropriate curvature can be obtained by proper selection of donor site. With the above advantages, we conclude that augumentation rhinoplasty using split cranial bone graft is a good method in correction of congenital or posttraumatic deformity of nose.
Cicatrix ; Congenital Abnormalities ; Hospitalization ; Humans ; Methods ; Nose ; Rhinoplasty* ; Tissue Donors ; Transplants*

No abstract available.
Animals ; Capsaicin* ; Macrophages, Peritoneal* ; Mice*

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

BACKGROUND: The purpose of this study was to survey hygiene behavior of healthcare personnel according to the Hygiene Inventory 23 (HI23) and to use the results in education and research for promoting hygiene behaviors. METHODS: We sampled a total of 400 people with 50 from each job category. The sample was obtained through convenient sampling among 8,200 employees working at a tertiary-care hospital with 2,600 beds in Seoul. The HI23 consisted of 5 subscales and 8 questions on general hygiene, 3 on household hygiene, 3 on food-related hygiene, 5 on hand hygiene methods, and 4 on personal hygiene, resulting in a total of 23 questions. The researcher also added 14 questions on the general characteristics of the subjects. The self-administered questionnaires were distributed on October 2009 and analyzed blindly. RESULTS: The average total score for hygiene behavior was 3.04+/-0.44 (maximum of 4). In the subcategory of hygiene behavior, the mean score was 3.20+/-4.24 for general hygiene, 3.07+/-0.68 for household hygiene, 3.07+/-0.68 for food-related hygiene, 2.91+/-0.69 for hand hygiene methods, and 2.97+/-0.48 for personal hygiene. When factors affecting the level of hygiene behavior were identified through multivariate regression analysis, independent factors were found to be gender (female), job category (food-related job), experience in hand hygiene education, and experience in teaching hand hygiene or general hygiene. CONCLUSION: Programs and education adapted to the characteristics of each job category in hospitals are needed to promote hygiene behaviors such as general hygiene, hand hygiene methods, household hygiene, food-related hygiene, and personal hygiene.
Delivery of Health Care ; Family Characteristics ; Hand Disinfection ; Hand Hygiene ; Humans ; Hygiene ; Surveys and Questionnaires

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

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

No abstract available.
Masticatory Muscles* ; Spasm* ; Tetanus*