No abstract available.
Herpes Simplex ; Herpes Zoster ; Humans ; Methylmethacrylates ; Polystyrenes

As a benign adnexal tumor, steatocystoma usually occurs as an autosomal dominant condition known as steatocystoma multiplex. Steatocystoma simplex, the noninherited solitary counterpart of steatocystoma multiplex,was first described by Brownstein in 1982, and is exceedingly rare. We report a case of steatocystoma simplex in a 27-years-old female, who presented with an asymptomatic soft, oval shaped mass on the lower anterior neck. The lesion was completely excised and confirmed as steatocystoma simplex on histopathological examination.
Female ; Humans ; Methylmethacrylates ; Neck ; Polystyrenes ; Steatocystoma Multiplex

No abstract available.
Encephalitis, Herpes Simplex ; Herpes Simplex ; Methylmethacrylates ; Neurosyphilis ; Polystyrenes

Steatocystoma is a benign adnexal tumor originating from the pilosebaceous duct junction which can be classified into two groups (steatocystoma simplex and steatocystoma multiplex). Steatocystoma simplex, which presents as a solitary lesion, is very rare. Steatocystoma simplex occurs most commonly on the face and the case reported herein involving the scalp is extremely rare. A 49-year-old man presented for evaluation and treatment of a solitary papule on the right parietal scalp which had persisted for a period of 1 year. The histopathologic examination revealed a thin-walled cyst consisting of stratified squamous epithelium with hyaline cuticle that lacked a stratum granulosum. Based on clinical and histologic findings, we diagnosed this case as steatocystoma simplex of the scalp and report this rare case.
Epithelium ; Humans ; Hyalin ; Methylmethacrylates ; Middle Aged ; Polystyrenes ; Scalp

STATEMENT OF PROBLEM: Volume stability, microstructure reproducibility and fluidity along with compatibility with dental stone must be in consideration in order to use tissue conditioner as a material for functional impression. There are few studies concerning the influence of time factor in oral condition on surface roughness of the stone and optimal retention period in the oral cavity considering such changes in surface roughness. PURPOSE: The purpose of this study was to find out the influence of various kinds of tissue conditioner, its powder/liquid ratio and immersion time on surface roughness of the stone. MATERIAL AND METHODS: Materials used in this study were the three kinds of tissue conditioners (Coe-Comfort, Visco-Gel, Soft-Liner) and were grouped into three: group R - mixed with standard powder/liquid ratio that was recommended by the manufacturers, group M - mixed with 20% more powder, group L - mixed with 20% less powder. Specimens were made with the size of 20 mm diameter and 2 mm width. Each tissue conditioner specimens were subdivided into 5 groups according to the immersion time (0 hour, 1 day, 3 days, 5 days, 7 days), completely immersed into artificial saliva and were stored under 37degrees C. Specimens of which the given immersion time elapsed were taken out and were poured with improved stone, making the stone specimens. Surface roughness of the stone specimens was measured by a profilometer. RESULTS: Within the limitation of this study, the following results were drawn. 1. Major influencing factor on surface roughness of the stone model made from tissue conditioner was the retention period (contribution ratio (rho) = 62.86%, P < .05) of the tissue conditioner in oral cavity to make functional impression. 2. In case of Coe-Comfort, higher mean surface roughness value of the stone model with statistical significance was observed compared to that of Soft-Liner and Visco-Gel as immersion time changes (P < .05). 3. In case of group L (less), higher mean surface roughness value of the stone model with statistical significance was observed compared to that of R (recommended) and M (more) group as immersion time changes (P < .05). CONCLUSION: We may conclude that as the retention period of time in oral cavity influences surface roughness of the stone model the most and as the kind of tissue conditioner and its P/L ratio may influence also, clinician should well understand the optimal retention period in oral cavity and choose the right tissue conditioner for the functional impression, thus making the functional impression with tissue conditioner usefully.
Immersion ; Methylmethacrylates ; Mouth ; Retention (Psychology) ; Saliva, Artificial ; Time Factors

PURPOSE: The aim of this study was to determine whether the push-out bond strengths between the radicular dentin and fiber reinforced-composite (FRC) posts with various resin cements decreased or not, according to the coronal, middle or apical level of the root. MATERIALS AND METHODS: FRC posts were cemented with one of five resin cement groups (RelyX Unicem: Uni, Contax with activator & LuxaCore-Dual: LuA, Contax & LuxaCore-Dual: Lu, Panavia F 2.0: PA, Super-Bond C&B: SB) into extracted human mandibular premolars. The roots were sliced into discs at the coronal, middle and apical levels. Push-out bond strength tests were performed with a universal testing machine at a crosshead speed of 0.5 mm/min, and the failure aspect was analyzed. RESULTS: There were no significant differences (P>.05) in the bond strengths of the different resin cements at the coronal level, but there were significant differences in the bond strengths at the middle and apical levels (P<.05). Only the Uni and LuA cements did not show any significant decrease in their bond strengths at all the root levels (P>.05); all other groups had a significant decrease in bond strength at the middle or apical level (P<.05). The failure aspect was dominantly cohesive at the coronal level of all resin cements (P<.05), whereas it was dominantly adhesive at the apical level. CONCLUSION: All resin cement groups showed decreases in bond strengths at the middle or apical level except LuA and Uni.
Adhesives ; Bicuspid ; Boron Compounds ; Collodion ; Composite Resins ; Dental Cements ; Dentin ; Humans ; Methacrylates ; Methylmethacrylates ; Resin Cements

PURPOSE: A new light curing urethane dimethacrylate and a cold curing resin with simpler and faster laboratory procedures may have even improved flexural properties. This study investigated the 3-point flexural strengths and flexural moduli of two alternate base materials. MATERIALS AND METHODS: A cold curing resin (Weropress) and a light curing urethane dimethacrylate base material (Eclipse). Along with Eclipse and Weropress, a high impact resin (Lucitone199) and three conventional base materials (QC 20, Meliodent and Paladent 20) were tested. A 3-point bending test was used to determine the flexural strengths and flexural moduli. The mean displacement, maximum load, flexural modulus and flexural strength values and standard deviations for each group were analyzed by means of one-way analysis of variance (ANOVA) (with mean difference significant at the 0.05 level). Post hoc analyses (Scheffe test) were carried out to determine the differences between the groups at a confidence level of 95%. RESULTS: Flexural strength, displacement and force maximum load values of Eclipse were significantly different from other base materials. Displacement values of QC 20 were significantly different from Lucitone 199 and Weropress. CONCLUSION: The flexural properties and simpler processing technique of Eclipse system presents an advantageous alternative to conventional base resins and Weropress offers another simple laboratory technique.
Acrylic Resins ; Cold Temperature ; Denture Bases ; Dentures ; Displacement (Psychology) ; Light ; Methacrylates ; Methylmethacrylates ; Polyurethanes ; Urethane

Herpes simplex encephalitis (HSE) is the most common form of encephalitis, with predilection for the temporal lobes and insular cortex. The presence of RBCs is a characteristic finding of CSF analysis and hemorrhagic transformation of the lesions on CT or MRI is not a rare, because the hemorrhagic necrosis is an important pathologic finding of HSE. However, intracerebral hematoma is rarely reported. We report a case of PCR proven HSE with hemotomas in both the medial temporal lobes, which has not been reported.
Encephalitis ; Encephalitis, Herpes Simplex ; Hematoma ; Herpesvirus 1, Human ; Methylmethacrylates ; Necrosis ; Polymerase Chain Reaction ; Polystyrenes ; Temporal Lobe

BACKGROUND: Poroid neoplasms consist of classic poroma, hidroacanthoma simplex, dermal duct tumor, and poroid hidradenoma. Poroid neoplasms are not rare tumors in dermatology. However, studies of the clinicopathologic characteristics of poroid neoplasms in Korea are very limited. OBJECTIVE: To investigate the clinicopathologic characteristics of poroid neoplasms in Korea. METHODS: The clinicopathologic characteristics of forty three cases of poroid neoplasms were retrospectively analyzed. RESULTS: Poroid neoplasms were diagnosed mostly in the sixth decade, without sex predominance. The most common site was the lower extremities, followed by the head & neck, the trunk, the sole, the palm, and the upper extremities. All cases were observed as a solitary lesion. Papule or nodule shape, verrucous surface, and erythmatous color were most common characteristics of poroid neoplasms. The two cases showed sebaceous differentiation. Some cases showed melanin pigmentations in the lesions or perilesional basal layer. CONCLUSION: Our study will be a resourceful data of poroid neoplasms for dermatologists and pathologists.
Acrospiroma ; Dermatology ; Head ; Korea ; Lower Extremity ; Melanins ; Methylmethacrylates ; Neck ; Pigmentation ; Polystyrenes ; Poroma ; Retrospective Studies ; Upper Extremity

Acupuncture and cupping have a public reputation as being safe even though these practices can lead to complications such as trauma or infection. We report here on a case of herpes simplex virus (HSV) infection secondary to acupuncture and cupping in a 56-year-old woman. The patient, who had a history of acupuncture and cupping on her left forearm for treating her myalgia, developed painful papules. Histologically, the biopsy specimen showed characteristic ballooning degeneration and inclusion bodies in the epidermis and mid-dermis. These clinical and histological findings were consistent with the diagnosis of HSV infection.
Acupuncture ; Biopsy ; Epidermis ; Female ; Forearm ; Herpes Simplex ; Humans ; Inclusion Bodies ; Methylmethacrylates ; Middle Aged ; Polystyrenes ; Simplexvirus