per
دانشگاه ازاد اسلامی-واحد دندانپزشکی
Res Dent Sci
2008-4676
2228-7353
2018-07
15
2
56
62
article
Evaluation of Orthokin toothpaste and mouthwash effects on periodontal indexes in fixed orthodontic patients
SH Aghayan
shabnamaghayan@yahoo.com
1
S Hemmatpoor
2
S Sadat Mansori
3
Z Mahmoudi
4
Faculty of Dentistry, Islamic Azad University
Assistant ProfessorFaculty of Dentistry, Islamic Azad University
Faculty of Dentistry, Islamic Azad University
Background & Aim: Although it is shown that chlorhexidine can have a positive effect on periodontal indices, the resulting stains, prevent it to be prescribed for long term use. Therefore, we studied the effect of low concentration chlorhexidine on the periodontal indices and the level of staining in orthodontic patients.
Methods & materials: This study was conducted in a single blind randomized clinical trial with 20 patients (aged 14-30) undergoing fixed orthodontic treatment. Subjects were divided into two groups of 10, with group 1 on the Orthokin 0.06% chx mouthwash, and group 2 on the Orthokin 0.08% chx mouthwash.This three month study was divided into two phases.In each session, PI, GBI, GI and SI indices were measured. The cross over between the groups took place after 3 weeks wash out. Wilcoxon sign Rank test, Mann-Whitney test, Paired T-test and Independent T-test were performed for statistical analyzing.
Result: A significant decrease in both GI and GBI compared to baseline was observed in both phases. (p<0.005) In case of PI, in phase I, a significant decrease compared to baseline was observed in both groups. (p<0.005) In case of SI، In phase II, both products showed a significant increase in staining (p<0.005).
Conclusion: The results of this study suggest that Orthokin oral health products with low concentration of chlorhexidine play an important role in reducing PI, GI and GBI indicators in patients undergoing fixed orthodontic treatment. However, further studies with larger patient populations are recommended.
http://jrds.ir/article-1-906-en.pdf
toothpaste
mouthwash
gingivitis
periodontal index
orthodontics
per
دانشگاه ازاد اسلامی-واحد دندانپزشکی
Res Dent Sci
2008-4676
2228-7353
2018-07
15
2
63
67
article
comparison of articaine and lidocaine on pain during inferior alveolar nerve block
E Lasemi
1
M Sezavar
2
AR Moddaresi
m_s7605@yahoo.com
3
A Taghvaee
4
M Nazari
5
P KHodadadzadeh
6
Abstract
Background and Objectives: Injection is common in almost all patients. Considering the limited study in this field, this research was conducted for comparison of articaine and lidocaine on pain during inferior alveolar nerve block on patients referred to the facial and maxillofacial surgery department of Islamic Azad University dentistry in Tehran, 2017.
Methods and Materials: A randomized, single blind split-blind clinical trial was conducted. All patients requiring double-sided jaw injection were studied. Each side of the jaw was randomly assigned to control (lidocaine 2%) and case (Articaine 4%). An injection was performed for each person and the pain level during injection was measured with a 10-point VAS scale, in which zero means as no pain and ten as most pain, with a patient questionnaire. Then, in the next week, injection was performed on the other side of the jaw and the pain was recorded through the above. The solutions used were lidocaine 2% with epinephrine 1/80000, manufactured by the Pharmaceutical Company and Articaine 4% with epinephrine 1/100000, made of septodent factory in France. The needle used was 27-gauge long-shaft manufactured by the NRK factory in Iran. Each cartridge was injected during 60 seconds and was performed by one person on both sides of the anesthetic. Finally the results were evaluated by MANN_U_WHITNEY test.
Results: This study were conducted on 20 subjects (40 specimens) with lidocaine (1.9± 0.85) and articaine (1.1±0.71), respectively. The pain was 0.8 scale or 42% lower than that of lidocaine.(p<0.05)
Conclusion: Articaine seems to have less pain during inferior alveolar nerve block.
http://jrds.ir/article-1-886-en.pdf
inferior alveolar nerve block
Articaine
Lidocaine
local anesthesia
per
دانشگاه ازاد اسلامی-واحد دندانپزشکی
Res Dent Sci
2008-4676
2228-7353
2018-07
15
2
68
74
article
Effect of Two Oral Hygiene Learning Methods on Knowledge Among The Last Elementary Class Students
F Sayar
sayar_f@yahoo.com
1
Bahare Hatamy
bahare.hatamy@gmail.com
2
N Akhondi
akhondinasrin@gmail.com
3
MS Nazari
msn.dentist@yahoo.com
4
S Mehralizadeh
sandramehr@yahoo.com
5
N Valaee
naser.valaei2016@gmail.com
6
M Tavousi
7
Islamic azad University of Medical Sciences, School of Dentistry
private practice
Islamic Azad University, Tehran south branch
Islamic azad University of Medical Sciences, School of Dentistry
Mazandaran University of Medical Sciences
Abstract:
Background & Aim: oral hygiene instruction is usually done by hygienist mentors at schools via artificial models. Today, use of animation films is considered. The goal of this research was to compare new method with the traditional method to assess knowledge among students at the last elementary class in one of the schools in Tehran.
Materials and Methods: a multiple choice questionnaire with 6 questions was given to the students and the score was recorded as “pre-test” score. Then the students were randomly divided to the control and test groups (learning by educational film or artificial models). After 3 weeks of teaching, the questionnaire was answered again by the students and the score was recorded as “post-test” score. Mcnemar and Chi-squared statistical analysis were used to interpret the results.
Results: Knowledge before learning in the artificial models & animation film was 48.2% and 33.3% respectively and after learning these percentage changed to 64.3% & 59.7%. Both learning methods showed positive result to promote knowledge (P<0.01), although there was no significant difference between these two methods(P<0.6).
Conclusion: the two learning methods showed the same improved knowledge among the test groups. It could be suggested the animation film could be assumed as a good method due to its repeatability and cost effective advantage.
http://jrds.ir/article-1-903-en.pdf
education
oral hygiene
animation
primary school
student
per
دانشگاه ازاد اسلامی-واحد دندانپزشکی
Res Dent Sci
2008-4676
2228-7353
2018-07
15
2
75
83
article
H Ansari lari
1
MR Mobayyeni
Mrmobayeni@yahoo.com
2
SH Dehghani
3
Y Rostami
4
P Bolandeian
5
http://jrds.ir/article-1-998-en.pdf
per
دانشگاه ازاد اسلامی-واحد دندانپزشکی
Res Dent Sci
2008-4676
2228-7353
2018-07
15
2
84
92
article
Effect of CPP-ACPF on Microhardness of Enamel before and after exposure to energy drink (in vitro)
S Banava
1
S Akhoundan
baran85_ss@yahoo.com
2
Background: One of the most regular extrinsic factors that decreases microhardness of the enamel is acidic beverages such as energy drinks. These beverages reduce the pH of the oral environment and could solve dental enamel. This in vitro study demonstrates the effect of CPP-ACPF paste on enamel microhardness, demineralized by energy drinks.
Materials and methods: In this experimental study, 30 intact enamel pieces of human premolars were selected and primary microhardness was measured and recorded on all samples by Microhardness Tester (Vickers). Then divided into three groups. Control group was immersed in 30 ml Red Bull drink and artificial saliva. This procedure was for 7 days. Group 2 were immersed in Red Bull drink like group1, but samples were coated with 0.3 gr CPP-ACPF for 3 minutes after immersing in energy drink. Then the paste was mixed with artificial saliva for 2 minutes. In group 3, first, CPP-ACPF was applied similar group 2, then after one hour, the samples were immersed in Red Bull drink as mentioned before. At the end of 7 days, the secondary microhardness was measured. The data were analyzed with repeated-measure ANOVA and Post Hoc analysis.
Results: The microhardness was significantly different before and after the interventions in each group (P< 0.001). Groups 2(secondary microhardness: 316) and 3 (secondary microhardness: 318) were significantly different from group 1(secondary microhardness: 277.2). (P<0.001) But, there was no significant difference between groups 2 and 3(P=0.326). It shows that application of the CPP-ACPF before or after energy drink can increase microhardness of samples or remineralization of them comparing to group1.
Conclusion: According to this study, Red Bull energy drink decreases enamel hardness. Using CPP-ACPF paste before or after drinking energy beverages could increase the hardness and improve remineralization.
http://jrds.ir/article-1-923-en.pdf
erosion
energy drink
microhardness
CPP-ACPF paste
artificial saliva
per
دانشگاه ازاد اسلامی-واحد دندانپزشکی
Res Dent Sci
2008-4676
2228-7353
2018-07
15
2
93
98
article
Comparison of debris extrusion in Xp-endo-Shaper and One-Shape rotary systems: in vitro study
S Savadkouhi
s_savadkouhi@yahoo.com
1
E Esnaashari
ehsan_dmd@yahoo.com
2
A SHahzaidi
3
M Fazlyab
4
AA Moshari
amirabbas.moshari@gmail.com
5
Assistant Prof, Endodontics Dept, Dental Branch, Islamic Azad University,Tehran, Iran
Assistant Prof, Endodontics Dept, Dental Branch, Islamic Azad University,Tehran, Iran
Background & AIM:
Extrusion of debris from apex is one of the main factors of flare up (inflammation, pain or combination of both). Various studies have been conducted toward the amount of debris extrusion but no one compared this drawback on one – shape and xp-shaper system in curved root canals. So, this study aimed to determine the amount of apical debris extrusion following preparation of canal by one-shape or xp-shaper in curved canals of mesiobuccal root in mandibular first molars.
Method & Matherial:
This experimental study was done on 34 mandibular first molars with 30 to 40 degree curved mesiobuccal root canal. The samples were randomly divided in two groups. First group had one – shape for root canal preparation while the other had xp-shaper. Roots of the teeth were fixed in pre weighted fluxes till cervical area so that all apical debris were collected in vials. After desiccation process, the vials were weighted again. The difference between original and secondary weight of vials containing debris is considered as weight of debris extrusion .Data were analyzed using T-test.
Results:
Amount of debris extrusion in one – shape group was 0/018±0/014 and in xp-shaper group was 0/01±0/007 and the difference was statistically significant ( 0/01).
Conclusions:
Considering the situation and limitation of this in vitro study, xp-shaper rotary system was associated with less debris extrusion compared to one – shape systems.
Key words:Extrusion debris, One – Shape, Xp-endo-Shaper, full rotation
http://jrds.ir/article-1-905-en.pdf
Extrusion debris
One – Shape
Xp-endo-Shaper
full rotation
per
دانشگاه ازاد اسلامی-واحد دندانپزشکی
Res Dent Sci
2008-4676
2228-7353
2018-07
15
2
99
104
article
Effect of timing for core preparation in the tooth fabricated with post and core casting on the tensile strength
e jalalian
1
Kimia atar
2
nazanin samiee
3
Marjan golmirzaee
4
hadi kasebghane
5
Abstract:
Background &Aim: Several factors are affect retention of post and core. One of the most common problem is time of core preparation after post cementation. The purpose of this in vitro study was evaluate the influence of timing of coronal preparation on the tensile strength of cast post and cores cemented.
Methods &Materials: In this in vitro study 30 extracted intact human premolars were selected. Each tooth was sectioned 16 mm from the root apex. After endodontic treatment of teeth the root canals were prepared for post fabrication. post and cores were cast in Ni-Cr alloy and cemented with zinc phosphate cement then divided into 3 groups: 1) core preparation immediately after cementation 2) core preparation 24 hours after cementation 3)control (without preparation).The tensile strength test was performed by a universal testing machine (zwick roell) with speed of 0.5 mm/min .The obtained data statically analyzed using one-way ANOVA test.
Results: Significant differences were found in tensile strength between 3 groups. Tensile strength were, 176.83±43.15 for group1, 120.06±24.27 for group2 and 186.76±44.61 for group3. There is no significant difference between groups 1 and 2.(p=1.000)
Conclusion : It concluded that core preparation immediately after setting and cementation with zinc phosphate has significant influence the tensile strength of post and cores but core preparation 24 hours after setting has not significant effect on the tensile strength of post and cores.
http://jrds.ir/article-1-1278-en.pdf
Key words: Cast post and cores¸ tensile strength¸ zinc phosphate cement
time
per
دانشگاه ازاد اسلامی-واحد دندانپزشکی
Res Dent Sci
2008-4676
2228-7353
2018-07
15
2
105
111
article
Evaluation of association between asthmatic children and molar-incisor hypomineralization lesion and caries
K Salem
1
SH Hamidiaval
2
P Etezadkeyhani
pardis_keyhani70@yahoo.com
3
G Lotfi
4
S Aghaee
5
Abstract:
Backgroundand aim: Hypomineralization of the molar incisor (MIH) is a malformation with a systemic background whose etiology is not well defined. One of the factors contributing to the development of this lesion is the likelihood of its association with respiratory problems and asthma in the first years of life. The purpose of this study was to investigate the association between MIH and asthma.
Materials and Methods: This historical cohort study was conducted on 73 six to twelve years old children with asthma and the control group in Rasht. Dental examinations were carried out by a practitioner at the site of asthma clinic and schools, with the use of mirrors and syringes without drying the dental surfaces. Presence and intensity of MIH were determined due to Pedodontics standard criteria. Chi-square test, Mann-Whitney test and were used to analyze the relationship between different factors.
Results: 29.3% of asthmatic children had MIH, while only 17.1% of the control group had it.
(P<0.001) The Mean DMFS index was 0.87±0.34 and 0.87±0.32 in asthmotics and controls respecting (p<0.9).
Conclusion: Based on the results of this study, children who had symptoms of asthma before the age of three have a high risk of having MIH and should be gone under early dental care.
http://jrds.ir/article-1-894-en.pdf
Asthma
Molar incisor Hypomineralization
Children
per
دانشگاه ازاد اسلامی-واحد دندانپزشکی
Res Dent Sci
2008-4676
2228-7353
2018-07
15
2
112
118
article
Evaluation of mandibular canine roots and canals symmetry and related factors in CBCT images of patients referred to Radiology department of Dental branch, Islamic Azad University at 2016.
L Hafezi
1
SH Sakhtari
2
N Valaee
3
H Zamani
H_zamani94@yahoo.com
4
Background & aim: Knowledge about tooth anatomy and root canal morphology is necessary for success of endodontic treatment and present complexity of root canals during endodontic treatments and periapical surgery. The aim of this study was to evaluate the mandibular canine roots and canals symmetry and related factors in CBCT images of Iranian patients.
Materials and Methods: This descriptive study was performed on 200 CBCT scans of the Mandible of patients with sound bilateral mandibular canines . The files with acceptable quality and contain bilateral mandibular canines with mature and normal apexes and without internal and external resorption and filling of roots and crowns were chosen. Then, they are evaluated through three plans of coronal, sagittal and axial due to symmetry of canal and root numbers and morphology, foramen and orifice numbers and also related factors as age and sex. Data was analyzed using K square test.
Results : Symmetry of roots and canals was present in 176 samples (88%) and not appeared in 12%. 17 samples (70.8%) without root symmetry and 93 ones (53.8%) with root symmetry were female. (p<0.09) symmetry of roots was not significantly correlated with age. (p<0.9). The evaluated canines had single canal for 87% and two canals for 13% cases. 99.2% had single orifice and 0.8 cases had two orifices. The number of foramen was single for 97% and double for 3% cases and that was similar for left and right sides. (p<0.9)
Conclusion: It seems, symmetry of mandibular canine roots are notable. So, in cases with complex anatomical challenges during endodontic treatments, dentists should be approached for tooth treatment leading to another side.
http://jrds.ir/article-1-883-en.pdf
Cone Beam Computed Tomography
Mandibli
Root Canal Morphology
Cannine tooth mandible
per
دانشگاه ازاد اسلامی-واحد دندانپزشکی
Res Dent Sci
2008-4676
2228-7353
2018-07
15
2
119
124
article
Awareness, use and Satisfaction of Dental Assistants of Iranian Medical Digital Library
SJ GHazimirsaeed
ghazi37@gmail.com
1
M Esmaeelpourbandini
2
M Lotfi
3
A Ghamgosar
a-ghamgosar@gums.ac.ir
4
Medical Library and Information Science, Guilan
Medical Library and Information Science, Guilan
Abstract
Back ground and Aim: Digital libraries provide suitable substrates for use in the field of electronic information resources. Obtain and introduce of electronic resources to targets may be challenging for operators. Thus, the objective of this study is to determine awareness, use and Satisfaction of dental assistants of Iranian Medical Digital Library.
Materials & Methods: This is a descriptive study conducted among 267 dental assistants at Tehran, Shahid Beheshti and Shahed Universities of Medical Sciences used census to recruit participants used a self-designed questionnaire to collect data. Validity of the study instrument was investigated by faculty members in Medical Information Sciences and its reliability was assessed by Cronbach's alpha of.88.
Results: 180 (80%) of dental assistants were aware of Iranian Medical Digital Library. A majority of respondents used it from home and the library of college. Most of them used Iranian Medical Digital Library for their research work. The largest number of them studied 1-2 resources per week. The level of satisfaction was moderate.
Conclusion: Level of awareness from Iranian Medical Digital Library was suitable. Educational courses in clinical dentistry could be accelerate to achievement of articles and digital sources. Also, encourage students to use these resources for those did not aware and use them. Level of usage and satisfaction were lower than moderate.
http://jrds.ir/article-1-902-en.pdf
Awareness
Dental Assistants
Iranian Medical Digital Library
Use
Satisfaction