1 2251-9890 Babol University of Medical Sciences 106 Oral Medicine Salivary superoxide dismutase activity in the consumers of paan containing tobacco Farhadmollashahi Leila b Nakhaie Alireza c Honarmand Marieh d Arbabi-Kalati Fateme e Ghahari Payam f b ,Dental Research Center, Department of Oral Medicine, Faculty of Dentistry, Zahedan University of Medical Sciences, Zahedan-Iran. c ,Department of Biochemistry, Faculty of Medicine, Zahedan University of Medical Sciences, Zahedan-Iran. d ,Dental Research Center, Department of Oral Medicine, Faculty of Dentistry, Zahedan University of Medical Sciences, Zahedan-Iran. e Department of Oral Medicine, Faculty of Dentistry, Zahedan University of Medical Sciences,Zahedan-Iran. f ,none 1 3 2014 3 1 8 13 28 10 2013 22 12 2013 Introduction:The habit of smokeless tobacco chewing is one of the known risk factors for oral cancer among the residents of southeast of Iran. Most likely, the antioxidant defense system in dealing with free radicals induced paan and prevention of oral cancer is important. In this study, the activity of superoxide dismutase is compared in the saliva of paan consumers and non-consumers. Methods:In this study , Unstimulated saliva of 87 subjects (47paan consumers and 40 non-consumers) who referred to the Oral Medicine Department of Dentistry School of Zahedan was collected. The activity of superoxide dismutase enzyme was measured by standard biochemical methods (Mc Cord and Fridovich) and the obtained data were analyzed by statistical software SPSS-15 through non-parametric Mann-Whitney test. Results:The mean activity of superoxide dismutase was significantly higher in the paan consumers group( 4.4±1.6 u/mg ) compared to non-consumers (3.59±1.8 u/mg,p=0.027). Conclusion:The results of this study demonstrate that consumption of paan leads to increased activity of salivary superoxide dismutase.
103 General Dentistry Hearing threshold evaluation of dentistsin Babol (North of Iran) Ehsani Maryam g Monadi Mohsen h Ranjbar Shooka i Bijani Ali j Ghasemi Nafiseh k g ,Dental Materials Research Center, Department of Endodontics, Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. h ,Department of Audiology, Faculty of Medicine, Babol University of Medical Sciences, Babol-Iran. i ,Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. j ,Non-Communicable Pediatrics Diseases Research Center, Babol University of Medical Sciences, Babol-Iran. k ,none 1 3 2014 3 1 14 20 31 08 2013 07 12 2013 Introduction:Noise in dental offices is one of the risk factors in the workplace. One of the major effects of noise is hearing loss. This study aimed to determine the effects of noise on hearing thresholds of dentists of Babol city. Methods:This descriptive analytical cross-sectional study was performed on 40 dentists in Babol City (as case group) and 40 office workers (as control group). Hearing thresholdswere measured from all the subjects. The mean hearing threshold was calculated at different frequencies in each group and compared with the number 15 db. The data were analyzed by statistical software SPSS17and p≤0.05was considered significant. Results:The mean and standard deviation of hearing thresholds for the right ear of dentists and the control group without considering the different frequencies were 13.6156±9.14210db and10.0156±5.4488db (P=0.036),respectively and for the left ear were12.5115± 8.7609db and 10.059 ± 5.9254db respectively. Hearing threshold of right and left ear of young and middle age dentists was not significant. The hearing thresholds of the dentists with work experience of 15 years or less were not significant for the right and left ear. Auditory thresholds were significant between male and female only for the left ear (P=0.02). Conclusion:There was a change in hearing thresholds at all frequencies. A clear difference was in the left ear of men and women and hearing loss was higher in men. Also, age and working experience were not among the contributing factors to the incidence of noise-induced hearing loss. 90 Periodontics Correlation between caries prevalence and chronic perodontitis Entezari Sara l Amoian Babak m Fereidooni Majid n Esmi Fateme o Bijani Ali p l ,Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. m ,Dental Materials Research Center, Department of Periodontics, Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. n ,Dental Materials Research Center, Department of Periodontics, Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. o ,Department of Operative Dentistry, Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. p ,Non-Communicable Pediatrics Diseases Research Center, Babol University of Medical Sciences, Babol-Iran. 1 3 2014 3 1 21 27 08 06 2013 10 11 2013 Introduction : Periodontitis and dental caries may be synergistically associated, negatively associated, or completely independent.The aim of this study was to evaluate the correlation between these two diseases and investigate the prevalence of dental caries in periodontitis. Methods: This cross- sectional study has been performed in 180 samples in two groups: periodontal and control group during 2012-2013 in Babol Dental School.All 180 patients were divided into two groups, including 90 cases with chronic periodontitis as the periodontal group (PG) and 90 cases with healthy gums as the control group ( probing depth between 2- 3 mm) (HG).Clinical measurments including Gingival Index ( GI), Bleeding Index( BI), Clinical Attachment Loss (CAL), Periodontal Pocket Depth (PPD) were used to assess the severity of periodontal disease . The clinical features of control group were healthy gums , probing less than 3 mm in depth, and CAL< 1mm . The examination to measure AL was conducted using a Williams’s periodontal probe .In chronic periodontitis group , the patients had GI≥1 and CAL ≥ 1 .The assessment of caries of patients was conducted using bitewing radiography for proximal caries detection , dent on the use of explorer and direct observation. A p-value≤0.05 is considered as significant. Results: The results of this study showed that the mean number of decayed and filled teeth (DFT) in periodontal group was 4.32 ± 0.17, and in healthy group was 2.16 ± 0.17.DFT in males with periodontitis was 4.85 ± 0.17 and in females was 4.3 ± 0.17 ,while the healthy males was 2.54 ± 0.17, and females was 2.25 ± 0.17 therefore, the mean DFT in the periodontal group was more than the healthy group (p≤0.05) . Conclusion : Based on our findings, in patients with periodontitis, more dental carries were more significant than the healthy group. 85 Prosthodontics Comparative study of digital radiopacity of dental cements Alhavaz Abdolhamid Haghanifar Sina Vakili Yashar Poorsattar-Bejehmir Arash ,Dental Materials Research Center, Department of Prosthodontics, Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. ,Department of Oral & Maxillofacial Radiology, Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. ,none ,Dental Materials Research Center, Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. 1 3 2014 3 1 28 34 22 05 2013 27 11 2013 Introduction: Radiopacity is a necessary property for luting cements . The aim of this study was to investigate the radiopacity of some luting dental cements used in prosthetic dentistry. Methods: Five disclike samples of each material (6 x 1 mm) were prepared from panavia F2.0(Pa), Chioce2 (Ch.2), Glass ionomer GC (GI GC), zinc phosphate Hoffmann’s (ZP hof), zinc polycarboxylate Hoffmann’s (ZPC hof), Glass ionomer ariadent( GI ari), zinc phosphate ariadent(ZP ari) and zinc polycarboxylate ariadent (ZPC ari). The radiopacity of each material along with aluminium step wedge were measured from radiographic images using a digital radiography. The average measured radiopacities from five areas were taken into account, which were measured by Digora for windows (DFW) software using a PSP digital sensor. Results: There was a significant difference between radiopacity value of all luting materials (P≤0.001). ZP ari had the highest radiopacity with 7.7±0.55 mm aluminium. The Glass ionomer ariadent ari dent showed the lowest radiopacity value with 0.82±0.31 mm aluminium. Conclusion: All dental cements showed radiopacity values equivalent to or greater than the ISO 4049:2000(E)standard except ariadent Glass ionomer and this could be considered suitable for use in restoration cementation. 84 Endodontics A comparative evaluation of apical microleakage of MTA fillapex and AH26 sealers in the presence of blood in the canal space of the teeth Soleymani Ali Mirzairad Sina Mesgarani Abbas Harandi Azadeh khafri Soraya Feizi Farideh Bahmannia Mahyar ,Department of Endodontics, Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. ,Department of Endodontics, Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. ,Department of Endodontics, Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. ,Department of Endodontics, Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. ,Department of Social Medicine and Health, Faculty of Medicine, Babol University of Medical Sciences, Babol-Iran. ,Department of Anatomy Embryology and Histology, Faculty of Medicine, Babol University of Medical Sciences, Babol-Iran. ,Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. 1 3 2014 3 1 35 40 22 05 2013 10 11 2013 Introduction: Apical seal in blood or dry root canal is a problem in endodontic treatment. Failure of apical seal causes inflammatory reaction and failure root canal treatment. Because of the sealer properties, root canal should be dry for obturation. But hydrophilic sealers can adhere to root canal walls nowadays and this problem is still controversial. This study aimed at determining the apical microleakage of AH26 and MTA Fillapex sealers in dry and bloody condition. Methods: This experimental in vitro study was done on 48 extracted central teeth. The researchers used the Mtwo rotary files for root canal instrumentation. In this process, the teeth were divided into four groups (2 dry groups and 2 bloody groups) and two groups as positive and negative control (each group of 4 teeth). All sealers were prepared according to the factory instruction and the obturation was done with gutta-percha and sealer. After 7 days in 100% moisture condition, the teeth were placed in the ink for 3 days and then were cut across longitudinal axis and the level of microleakage was measured by stereomicroscope.Finally, the data were analyzed by SPSS software, ANOVA, Chi-Square and t-test statistical tests. Results:The mean of MTA Fillapex and AH26 apical microleakage in blood groups were (448.61± 34.67) Mm and (429.84± 31.63) Mm respectively. The minimum microleakage belonged to AH26 sealer, but it was not significant. Conclusion: AH26 sealer is a better barrier against microleakage in comparison with MTA Fillapx, although it is not significant. Also, the evidence suggests drying the canal leads to a better apical seal and the blood significantly increases apical microleakage.  98 Restorative Dentistry Comparative evaluation of the effect of Light Emitting Diode (LED) and Quartz Tungsten Halogen (QTH) light curing units on color stability of Filtek Z350 XT Esmaeili Behnaz Razavi Shaghayegh Pakdaman Mahdie Bijani Ali Amiri Hoda ,Dental Materials Research Center, Department of Operative Dentistry, Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. ,Department of Operative Dentistry, Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. ,Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. ,Non-Communicable Pediatric Diseases Research Center, Babol University of Medical Sciences, Babol-Iran. ,Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. 1 3 2014 3 1 41 46 24 07 2013 21 12 2013 Introduction:Discoloration of the resin-based composites is a common problem in restorative dentistry. There are many factors associated with the discoloration of dental materials in the oral environment. The purpose of this study was to evaluate the color changes in a nano-composite cured with a quartz-tungsten-halogen (QTH) and light emitting diode (LED) unit. Methods:80 disk-shaped specimens were prepared using Filtek Z350 XT.The specimens were cured with two LED units (Valo and BluephaseC5) and QTH ) Astralis7 ( with two different energy density (400 & 750 mW/Cm²). The color of the materials was measured before and after immersing in tea and artificial saliva. Color change value (ΔE) were calculated and analyzed by 2-way ANOVA and Tukey’s test. Results: In artificial saliva group, the composites cured with Astralis7 and BluephaseC5 showed significantly more color stability. In tea group, the composites cured with BluephaseC5 significantly had the least color change. Conclusions: The type of light curing unit does not affect the color stability. Exposure time and interaction between light source and photo initiator content in composite may be the most important factors affecting color stability. 104 Oral & Maxillofacial Pathology A case report of neurofibromatosis Nafarzadeh Shimae Motallebnejad Mina Ghorbani Anahita Jamaatlou Naghmeh ,Department of Oral & Maxillofacial Pathology, Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. ,Cellular; Molecular Biology Research Center, Department of Oral Medicine, Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. ,Department of Oral Medicine, Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. ,Department of Oral & Maxillofacial Pathology, Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran. 1 3 2014 3 1 47 51 17 09 2013 08 01 2014 Introduction:Neurofibromatosis is a genetic disease characterized by multifocal benign tumors of peripheral nerves, called neurofibromas, and pigmented spots on the skin which inherited as autosomal-dominant. The most common form of the disease is neurofibromatosis type 1, also known as von Recklinghausen's disease of the skin. When an individual has small number of lesions in a limited region of the his body, it could be missed by the patient or not acknowledged by the clinicians as a form of neurofibromatosis.We present here, a case of an 18-year-old male with neurofibromatosis type 1who referred to Babol Dental School for a routine dental examination. 116 Oral & Maxillofacial Radiology Langerhans' cell histiocytosis with multiple radiolucent lesions in the body of the mandible,report of a case Pazhutan Maryam Sakhdari Shirin Mashhadiabbas Fatemeh Afghahi Mahsa Khodaei Fatemeh ,none ,Department of Oral and Maxillofacial Radiology, Islamic Azad University, Dental Branch,Tehran–Iran. ,Department of Oral & Maxillofacial Pathology, Faculty of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran–Iran. ,Department of Oral & Maxillofacial Radiology, Faculty of Dentistry,Tehran University of Medical Sciences, International Campus, Tehran–Iran. ,none 1 3 2014 3 1 52 56 20 12 2013 25 02 2014 Introduction:Langerhans cell histiocytosis (LCH) refers to a group of rare reticuloendothelial system disorders and it occurs most often in young adults and children. A 57-year-old edentulous female patient who complained of dull pain in the posterior region of the mandible referred to the dental office, with a complaint of dull pain in the posterior region of the mandible. The lesion was diagnosed as LCH . Oral manifestations could be the first signs of Langerhans' cell histiocytosis . Therefore, t he dentist must be aware of the oral symptoms so in order that the disease is not overlooked .