Comparison of shear, tensile and shear/tensile combined bonding strengths in bracket base configurations / 대한치과교정학회지

The purpose of this study was to evaluate shear, tensile and shear/tensile combined bond strengths(SBS, TBS, S/TBS) in various orthodontic brackets bonded to human teeth with chemically cured adhesive (Ortho-one, Bisco, USA). Five types of metal brackets with various bracket base configurations (Micro-Loc base(Tomy, Japan), Chessboard base(Daesung, Korea), Non-etched Foil Mesh base(Dentarum, Germany), Micro-Etched foil Mesh base(Ortho Organiners, USA). Integral base(Unitek, USA)) were used in this study. Shear, tensile and shear/tensile combined bond strengths according to the direction of force were measured by universal testing machine. The bracket base surface after bond strength test were examined by stereoscope and scanning electron microscope. The assessment of remnant on bracket base surface was carried out by ARI(adhesive remnant index). The results obtained were summarized as follows ; 1. In all brackets, SBS was in the greatest value(p0.05). Non-Etched Foil Mesh base and Micro-Etched Foil Mesh base bracket were similar in SBS and TBS(p>0.05), But Micro-Etched Foil Mesh base bracket was greater than Non-Etched Foil Mesh base bracket in S/TBS(p<0.05). 4. Bond failure sites were mainly between bracket base and adhesive, therefore ARI scores were low.

Comparison of Doses of the Epidural Buprenorphine for Postoperative Pain Control after Lower Abdominal Surgery / 대한마취과학회지

Since the first use of epidural morphine in man, a number of other opiates have been studied including fentanyl, pethidine, methadone, diamorphine and buprenorphine. Among them buprenorphine is a relatively new synthetic opiate that is known to be highly lipophilic and to have an affmity for the opiate receptor approximately twice that of morphin:, It is produced in a preservative free solution, and would seem a logical choice for epidural analgesia. But there was no data on the adequate dose for the. postoperative pain control after lower abdominal surgery. Current study was designed to investigate the efficacy of three doses of epidural buprenorphine for postoperative pain control with the checking the pain score. Fifty seven female patients undergoing elective lower abdominal surgery were randomly assigncd to receive epidural buprenorphine as a rate of 0.3 (group A, initial dose 0.15 mg + maintenance dose O.l5 mg), 0.45 (group B, 0.15 mg + 0.3 mg), or 0.6 mg (group C, 0.3 mg + 0.3 mg) utilizing the Two-Day TI4l Infusor during the two days after cessation of operation. Authors compared the efficacy of three doses with checking the pain scale (Facial expression pain scale, Prince Henry pain scale) at 6, 12, 24, and 48 hour postoperatively. Side-effects were recorded. There were no significant difference among three groups with respects to mean age. Analgesic effects for patients receiving 0.6 mg (group C) were superior to those of group A but were not significantly different from analgesic effects of group B except 6 hour postoperatively. Side-effects (nausea and vomiting) of group C were significantly more than group B. The dose of epidural buprenorphine in Group B (initial dose 0.15 mg+maintenance dose 0 3 mg) may be recommended for postoperative analgesia following lower abdominal surgery.

A Case of Familiar Benign Chronic Pemphigus / 대한피부과학회지

A 25-year-old man with familial benign chronic pemphigus presented with a one-year history of a localized pruritic recurrent eruption on his perianal area, Physical examination showed moist, macerated, fissured and scaly patches on erythematous base, A biopsy specimen showed extensive intraepidermal separation containing acantholytic cells. Electron microscopic observation showed widened intercellular space, detachment of the tonofilaments from the desmosomes, and subsequent concentration of the tono filaments around the nucleus. Microvilli were elorigated, thinned and branehed. 1)esmosomes were reduced in number. This case is unique in its clinical location, showing no family tendency.

A Case of Epidermodysplasia Verruciformis Associated with Bowen's Disease / 대한피부과학회지

We present a case of epidermodysplasia verruciformis a.ssociated with Bowen's disease. Patient was 33 year-old male and his skin lesions showed diffuse flat papules on face and neck, many brownish papules on trunk and papillomatous tumors also appeared un scalp and post auricular area, Skin biopsy findings from the flat papular lesion showed histopathologic features of verruca plana and from the papillomatous lesion showed the feature of Bowen's disease. Electron microscopic finding from the flat papular lesion showed marked aggregates of viral particles around the nuclei of epidermal keratinocytes.