No abstract available.
Female ; Humans ; Student Health Services*

No abstract available.

No abstract available.
Child* ; Humans ; Stomatognathic Diseases*

No abstract available.
Antiviral Agents*

No abstract available.
Nutrition Policy*

STATEMENT OF PROBLEM: Adhesives in dentistry play a major role in the success of restorative treatments. In the treatment of all ceramic restoration it is needed to find the adequate bond strength between enamel and dentin. PURPOSE: The purpose of this study was to evaluate shear bond strength of resin cement bonded to extracted human uncut enamel, cut enamel, and dentin in vitro. MATERIAL AND METHODS: Ten freshly extracted anterior teeth without any previous restorative treatments were chosen. The extracted teeth were embedded in PMMA cold acrylic in the shape of a cylinder, 25 mm in diameter by 25 mm in height. The bonding system used was as follow: Uni-Etch (32 % phosphoric acid), One-Step adhesive, Duolink resin cement. The specimens were acid etched and rinsed with water. Two layers of One-Step adhesive were coated with a disposable brush on the uncut enamel. VIP curing light at 500 mV/cm2 was used to cure the adhesive. For cut enamel shear bond test, the specimen used for uncut enamel was further reduced approximately 0.3 - 0.5 mm using a laminate preparation diamond bur (0.3 mm in depth). The specimens were subsequently treated with 320-grit SiC paper followed by 600-grit SiC paper and cleaned with distilled water. The bonding procedure on the cut enamel was same as uncut enamel bonding procedure. For dentin bonding test, the specimen used for cut enamel was further reduced approximately 0.5 mm ~ 1.0 mm using a laminate preparation diamond bur (0.5 mm in depth of diamond cutting). The amount of reduction was evaluated with the silicone mold. The specimens were subsequently treated with 320-grit SiC paper followed by 600-grit silicon carbon paper and cleaned in distilled water. The bonding procedure on the dentin was same as uncut enamel bonding procedure. All samples were mounted and secured on the Ultradent shear bond test sample holder, and Ultradent restricted shear bond testing device was used with Universal Instron machine until fracture. Analysis of variance (ANOVA) test was performed comparing the result at P<0.05. Multiple comparison (Tukey) was used to compare each groups. RESULT: The result showed that the mean value in shear bond strength of resin cement bonded to uncut enamel, cut enamel and dentin were 27.04 Mpa, 30.25 Mpa and 26.39 Mpa with respect. CONCLUSION: Within the limitation of this study, the mean value of the shear bond strength of cut enamel was higher than those of uncut enamel or dentin. However there existed no statistical differences between three different human dentition substrates due to increased adhesive characteristics.
Adhesives ; Carbon ; Ceramics ; Dental Enamel* ; Dental Instruments ; Dentin* ; Dentistry ; Dentition ; Diamond ; Fungi ; Humans* ; Polymethyl Methacrylate ; Resin Cements* ; Silicones ; Tooth ; Water

No abstract available.

Postcoital contraception or emergency contraception(EC), commonly known as the "morning after pills", prevents pregnancy after unprotected intercourse. A comprehensive definition of EC is as follows : "specific contraceptive methods that can be used as emergency measures to prevent pregnancy after unproteted intercourse". Both drugs and certain devices can be used for emergency contraception. The best-studied regimen(Yuzpe) consists of an ordinary combination of oral contraceptives containing ethinyl estradiol and norgestrel. Conventional clinical guidelines recommend a first dose within 72 hours after unprotected intercourse and a second dose 12 hours thereafter. These drugs are most effective when taken as soon as possible after the intercourse. The Yuzpe regimen reduced the risk of unintended pregnancy by at least 75% in clinical trials. The most common side effects of the Yuzpe method are nausea and vomiting. Levonorgestrel is the synthetic progesterone. The major benefits of levonorgestrel are the decreased side effects and greater contraceptive efficacy than Yuzpe regimen. Mifepristone (RU486) is a synthetic steroid that prevents progesterone from binding to the progesterone receptors and glucocorticoid receptors. It has been used extensively in Europe as an abortifacient and also has been used as an effective EC. Its common side effect is a delay in the onset of menses, leading to anxiety for the user. The intrauterine contraceptive device(IUCD) is the only method of emergency contraception available to women presenting beyond 72 h and within 5 days from unprotected intercourse. EC is not protective against infections such as STD(sexually transmitted diseases). There are many situations where EC is indicated, including condom rupture or slip, unplanned unprotected intercourse, incidental misuse of regular contraceptive methods, and sexual assault. Emergency contraceptive pills can prevent ovulation, but an alternative major mechanism of action is to prevent uterine implantation of the embryo at the endometrial level. A 3-week follow-up visit should be scheduled to assess the result and to counsel for regular contraception. EC provides a second chance at preventing undesired pregnancies. but it should not be used as a routine birth control method, because it is actually less effective and needs a higher dose at preventing pregnancies than most types of oral contraceptives. Widespread and appropriate use of EC will provide a promising means to reduce the incidence of unplanned pregnancy and to contribute to the women's health.
Anxiety ; Condoms ; Contraception ; Contraception, Postcoital ; Contraceptives, Oral ; Embryonic Structures ; Emergencies ; Ethinyl Estradiol ; Europe ; Female ; Follow-Up Studies ; Humans ; Incidence ; Levonorgestrel ; Methods ; Mifepristone ; Nausea ; Norgestrel ; Ovulation ; Pregnancy ; Pregnancy, Unplanned ; Progesterone ; Receptors, Glucocorticoid ; Receptors, Progesterone ; Rupture ; Vomiting ; Women's Health

No abstract available.
Vibration*

No abstract available.