ORIGINAL_ARTICLE
The Surface Hardness Value of a light cured Hybrid Composite Resin after 12 Hours Immersion in three alcohol-free mouthwashes
Introduction: Mouthwashes which prevent and control caries and periodontal diseases are commonly used even without professional prescription. Long-term use of mouth-washes may cause softening of restorative composites and lowering the longevity of restoration. The aim of this study was evaluation of surface hardness value of a microhybride composite (Filtek Z250) after 12 hours immersion in three kinds of alcohol-free mouthwashes.
Materials and Methods: 72 Cylinderical speci-mens of a microhybride composite 5mm wide were prepared, using drinking straw as a mold. Specimens were light-cured continuously for 40 seconds on each side with Elipar(3M,ESPE) curing light. The specimens were immersed in 50ml of distilled water for12 hours. After that, all of them were finished with silicone carbide papers under constant water as coolant. The specimens were divided into 4 groups, each with 18 samples, the first group immersed in Colgate plax , the second in Crest ( pro-health for me) , group3 in OraCare and group4 in water as the control group for 12 hours, which is equivalent to 1 year of daily mouthwash use at 2 minutes per day. Hardness measurement was taken by Vickers hardness tester with 1 kilogram load and 10 seconds loading time.
Result: Statistical analysis according to t-test and One-Way ANOVA test showed that there was no significant difference in surface hardness value of composite after 12 hours immersion between groups of mouthwashes and water( P value=0.353)
Conclusion: Based on the present study, alco-hol-free mouthwashes didn’t affect the surface hardness of Filtek(Z250) composite.
http://3dj.gums.ac.ir/article-1-69-en.pdf
2014-04-29
1
6
10.18869/acadpub.3dj.2.4.1
Mouthwashes
Composite Resins
Hardness Test
Reza
Davalloo
1
Department of Operative Denti stry, Guilan University of Medical Sciences, Dental School, Rasht, Iran
AUTHOR
Seyedeh Maryam
Tavangar
2
Department of Operative Denti stry, Guilan University of Medical Sciences, Dental School, Rasht, Iran
AUTHOR
https://orcid.org/0000-0001-8156-880X
Farideh
Darabi
3
Department of Operative Denti stry, Guilan University of Medical Sciences, Dental School, Rasht, Iran
AUTHOR
Zahra
pourhabibi
4
Guilan University of Medical Science, Dental School, Rasht, Iran.
AUTHOR
Niloufar
Alaei Alamouti
5
Guilan University of Medi cal Sciences, Dental School, Rasht, Iran
AUTHOR
ORIGINAL_ARTICLE
Color Stability of a Microhybrid Resin Composite Polymerized with LED and QTH Light Curing Units
Introduction: Discoloration of resin composites is a common reason for replacement of these restorations. The aim of this study was to eva-luate the influence of different light curing de-vices on color stability of a microhybrid resin composite.
Materials and Methods: 80 disc-shaped speci-mens (8 mm in diameter, 2-mm height) were fabricated from filtek Z250 resin composite. Specimens were divided into 4 groups (n=20) and cured with LED (Bluephase C5, Valo) or QTH (Astralis7 with two different light intensity) light curing devices. Baseline color of each specimen was measured with a spectrophotometer according to the CIE (L*a*b*) color scale. ( CIE L*a*b* is a color measurement system with dimension L for lightness and a and b for the color-opponent dimensions). Each subgroup (n=10) were immersed in tea or artificial saliva for 72h at 37°C. The color values of specimens were re-measured and the color change values (ΔE*ab) were calculated using One-Way ANOVA and Tukey test. A P value of <0.05 was considered significant.
Results: In groups immersed in tea, specimens cured with high power mode of Astralis7 (750mW/cm2), showed the statistically signifi-cant lowest color change. There was no statisti-cally significant difference between two types of Light Emitting Diode units.
Conclusion: Conventional halogen light (QTH) with high power mode showed the maximum color stability in tea.
http://3dj.gums.ac.ir/article-1-70-en.pdf
2014-04-29
7
14
10.18869/acadpub.3dj.2.4.7
Composite Resin
Surface Properties
Color
Halogen Dental Curing Lights
LED Dental Curing Lights
Shaghayegh
Razavi
1
Dental Materials Research Cen ter, Department of Operative Dentistry, Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran.
AUTHOR
Behnaz
Esmaeili
2
Dental Materials Research Cen ter, Department of Operative Dentistry, Faculty of Dentistry, Babol University of Medical Sciences, Babol-Iran.
AUTHOR
Hoda
Amiri
3
Babol-Iran
AUTHOR
Mahdiye
Pakdaman
4
Babol-Iran
AUTHOR
Ali
Bijani
5
Social Determinants of Health Research Center, Babol University of Medical Sciences, Babol-Iran.
AUTHOR
ORIGINAL_ARTICLE
Risk factors for severe early childhood caries in 2-3-year-old children in Rasht
Introduction: Severe early childhood caries is the presence of smooth-surface caries in children younger than three years of age. This rampant form of dental caries exerts a negative impact on the quality of life of both the child and the family .The purpose of this study was to investigate the risk factors for severe early childhood caries (S-ECC) among 2-3 year-old children in Rasht.
Materials and Methods: A retrospective, case control study was carried out on 267, 2-3 year-old-children, who were divided into two groups. The study group (cases) included 89 children who were diagnosed with S-ECC. The cases were compared with the control group including 178 children who were caries free. The mothers of children in two groups were asked to fill in a checklist containing the demographic data, dietary, sleep and oral hygiene habits of the children. Data were statistically analyzed using χ2 test and multiple logistic regression analysis.
Results: Statistical Significant variables associated with S-ECC were breast or bottle feeding to assist with falling asleep at night (P = 0.001), number of nights the child sleep through the night (P< 0.0001), on demand feeding (P < 0.0001), late start of brushing (P = 0.007), frequency of giving sugary snacks (P = 0.016) and the use of a bottle to drink sweetened liquids (P <0.0001). There was no significant relationship between S-ECC and the method, duration of feeding and educational level of parents.
Conclusion: Breast or bottle feeding to assist with falling asleep at night, number of nights the child sleep through the night, on demand feeding , late start of tooth brushing, frequency of giving sugary snacks and the use of a bottle to drink sweetened liquids were identified as risk factors for the development of dental caries in young children.
http://3dj.gums.ac.ir/article-1-71-en.pdf
2014-04-29
15
22
10.18869/acadpub.3dj.2.4.15
Child
Dental Caries
Risk Factors
Javaneh
Vejdani
1
Oro-Maxillofacial Developmental Disease Research Center, Department of Pediatric Dentistry, Faculty of Dentistry, Guilan University of Medical Sciences, Rasht, Iran.
AUTHOR
Zahra
Hadipoor
2
Rasht, Iran.
AUTHOR
Ehsan
Kazemnezhad Leyli
3
Social Determinants of Health ( SDH ) Research Center, Guilan University of Medical Sciences, Rasht, Iran.
AUTHOR
ORIGINAL_ARTICLE
Prevalence of Traumatic Injuries to the Anterior Primary Teeth in Preschool Children in Rasht, Guilan, 2012
Introduction: Dental trauma is a very significant problem in primary dentition. It has a physical, esthetic and psychological impact on the child and his/her parents. The purpose of this study was to assess the prevalence of traumatic injuries to the anterior primary teeth and determining factors in 2-5-year-old children in Rasht, 2012.
Materials and Methods: This research was a cross-sectional study. In order to examine for the signs of trauma to their anterior primary teeth, 748 two to five year-old children of kindergartens in the city of Rasht were chosen. A questionnaire regarding the demographic data of their children and history of the trauma were sent to the parents. The statistical analysis was chi-square test.
Results: The prevalence of traumatic injury to anterior primary teeth was 23.8%, with no significant differences between boys and girls. Enamel fractures were the most common traumatic injury (76.5%). The most common cause, location and seasonal variation of the trauma were respectively falling (95.6%), at home (59.8%) and summer (78.3%). There were more traumas in Children with increased over jet than those with normal or decreased over jet.
Conclusion: The dental trauma in primary dentition is an accident that occurs due to children’s development stage, even when they are cared for by mothers at home. There is a need for an educational program specifically directed at parents to inform them about the immediate dental treatment in case of traumatic dental injuries.
http://3dj.gums.ac.ir/article-1-72-en.pdf
2014-04-29
23
28
10.18869/acadpub.3dj.2.4.23
Child
Dentition
Primary
Prevalence
Injuries
Javaneh
Vejdani
1
Oro-Maxillofacial Develop mental Disease Research Center, Department of Pediatric Dentistry, Guilan University of Medical Sciences, Dental School, Rasht, Iran
AUTHOR
Somaye
Poor fathollah
2
Rasht, Iran
AUTHOR
Ehsan
Kazemnezhad Leyli
3
Ph.D in Biostatistics, Social Determinants Of Health ( SDH ) Research Center, Guilan University of Medical Sciences, Rasht, Iran.
AUTHOR
ORIGINAL_ARTICLE
Multiple Dental Anomalies in Primary and Permanent Dentition: A Case Report
Dental anomalies are rare findings that may affect development of occlusion and early intervention may be required. Here, a case of multiple anomalies in primary and permanent dentitions is reported.
The patient referred to the dental center with the chief complaint of multiple tooth decay. In the oral examination, the rare case of
triplication between the right geminated man-dibular A and right mandibular B was observed. A talon cusp on the maxillary deciduous lateral incisor was also noticed. In the panoramic radi-ograph view, two permanent supernumerary teeth were found at the region of primary tooth anomalies in both jaws. The article describes the management of the dentition during the dental transitory years of 5 to 7. Precise examination may reveal anomalies that require intervention. In some cases, presence of one anomaly in primary dentition, can suggest the possibility of further anomalies in both primary and permanent dentition. In this case, careful initial examination and dental panoramic radiographs led to early diagnosis and appropriate treatment plans in mixed dentition years.
http://3dj.gums.ac.ir/article-1-73-en.pdf
2014-04-30
29
33
10.18869/acadpub.3dj.2.4.29
Talon Cusp
Triplication
Supernumerary Tooth
Dental Anomaly
Anousheh
Rashed Mohassel
1
department of Pedodontics, Faculty of Dentistry, Birjand University of Medical Sciences, Birjand, Iran.
AUTHOR
Samir
Zahedpasha
2
department of Endodontics, Faculty of Dentistry, Birjand University of Medical Sciences, Birjand, Iran.
AUTHOR
Mahtab
Hamzeh
3
Department of Pediatric Dentistry, Guilan University of Medical Sciences, Rasht, Iran.
AUTHOR
ORIGINAL_ARTICLE
A Metal-Acrylic Bar for Splinting Implant Impression Copings
Precise transfer of three-dimensional position
of dental implants from oral cavity to the
cast needs special considerations in impression
making.
It has been suggested to splint the copings
by bars or acrylic resin material before making
impression. Some problems regarding to polymerization
shrinkage of acrylic resin have been
reported. In this study, we describe a metalacrylic
bar that has advantages of both acrylic
and metal bars.
http://3dj.gums.ac.ir/article-1-74-en.pdf
2014-04-30
34
36
10.18869/acadpub.3dj.2.4.34
Dental Implantation
Dental Impression Technique
Dental Materials
Acrylic Resins
Majid
Abolhasani
1
School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
AUTHOR
Amir Hossein
Shakibamehr
2
School of Dentistry, Guilan University of Medical Sciences, Guilan, Iran.
AUTHOR
Mahmoud
Sabouhi
3
Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
AUTHOR