ABSTRACT
Dental professional and their supporting staff daily handle many materials and chemicals with their uncovered hands. One of the most widely used chemical is methyl methacrylate monomer based dental material. Materials based on methacrylate and its polymer appear to be a significant reason for contact dermatitis in dental personnel. There may be other unfavourable effects on health. Objectives of the study was to see the effect of uncured polymeric resin composite material on the health of dental personnel. This survey based cross-sectional study was done on 330 dentists working in different areas of Karachi. Data were collected by interviews, telephonic conversations or by mailing questionnaire to the participants. The sampling area was the Karachi city and sampling method was non-random convenience sampling. The data were analyzed using SPSS version 17. Results showed that methyl methacrylate based resin composite material is a source of various allergic reactions among the dental personnel. It was concluded that the material can have adverse effects on dental practitioners and patients
ABSTRACT
To determine the sorption rate of flowable dental composites by using different photo-activation techniques. Ninety specimens of 3 different dental composites were used for study. 7mm in diameter and 2mm thick disc of each material were prepared in the laboratory by using brass moulds. 30 samples were polymerized each by Quartz Tungsten Halogen [QTH], Light Emitting Diode [LED] and Ultraviolet B [UVB] light curing units. Samples were taken out from mould and placed in clean glass tube, immersed in 2% methylene blue solution and placed in incubator for 24hrs. Absorbance was detected at 590nm by using Visible Spectrophotometer. The significant results were observed by using both Light Emitting Diode and Quartz Tungsten Halogen light units [*P< 0.01]. Ultraviolet B narrowband light found to be inappropriate for polymerization purpose. Similarly, composite Clinpro and Bioseal showed significant results in every photo-activation method [*P<0.01]. Light Emitting Diode units were as efficient in curing resin composite as Conventional Halogen lamps are. Ultraviolet B narrowband light was not appropriate in activation of dental composite while Clinpro and Bioseal are efficient flowable composites
Subject(s)
Ultraviolet Rays , Methylene Blue , Spectrum Analysis , SpectrophotometryABSTRACT
Objective: The aim was to estimate the prevalence of Insulin Resistance [IR] in Poly Cystic Ovary Syndrome [PCOS] and analyze its clinical parameters
Methodology: This observational study was conducted at Dow University Hospital during June 2011 till May 2012. Patients of PCOS were selected, an anthropometric measurement, examination and fasting blood test for sugar [FBS] and insulin was performed. Data was collected on pre designed questionnaire, was analyzed by SPSS version 16
Results: Forty-six cases of PCOS were included in the study. Prevalence of IR was 34.78%. Mean age of patients was 23.72 +/- 4.37 years. Waist Hip Ratio [WHR] was raised in 42 [91.30%], acanthosis was found in 26[56.50%], impaired FBS was seen in 9 [19.6%] and raised fasting insulin in 16 [34.8%] patients. There was significant association between acanthosis and WHR [0.044] and between acanthosis and FBS [0.008]. Correlation studies between parameters showed a significant correlation between Waist and Hips [0.93], similarly Waist and WHR showed positive correlation [0.59], at p < 0.01. Significant positive correlation was also found between waist and FBS [0.32] and FBS and WHR [0.378]
Conclusion: Acanthosis nigrican, raised WHR and FBS are significant parameters for insulin resistance in cases of Poly Cystic Ovary Syndrome [PCOS]