Shear Bond Strength of Three Auto-adhesive Resin Cements to Dentin
Farrokh
Asefzadeh
Assistant Professor, Dept of Restorative Dentistry, Dental School, Shahed University, Tehran, Iran
author
Mohsen
Merati
Postgraduate Student, Dept of Orthodontics, Dental School, Mashhad University of Medical Sciences, Mashhad, Iran
author
text
article
2009
per
Introduction: Today, much of the researches and innovations in dental materials are focused on simplification of the bonding procedures. The aim of this study was to assess shear bond strength (SBS) of three auto-adhesive dual-cured resin cements to dentin.
Materials & Methods: In this in vitro experimental study, 40 intact human Third molars were selected and randomly divided into 4 groups of 10 teeth. Group I (Control group): After 15 seconds of etching and application of Excite DSC Bond (Ex), Varilink II (Var II) composite was injected into the plastic ring and light cured. Group II: RelyX Unicem (RX) was injected into the plastic ring and light cured after 30 seconds (according to manufacturer's instruction). Group III: Maxcem (Mc) was injected into the plastic ring and light cured after 30 seconds (according to manufacturer's instruction). Group IV: Multilink Sprint (MS) was injected into the plastic ring and light cured after 30 seconds (according to manufacturer's instruction). After thermal cycling (1000 cycle, 5-55˚C), SBS were measured for each groups with a Zwick/Roell Universal Testing Machine. The data were analyzed by ANOVA and Scheffe tests.
Results: The mean SBS and Standard deviations for groups I, II, III and IV were 12.95±2.64, 6.73±0.79, 3.01±0.90 and 4.60±0.75 MPa respectively. Statistical analysis revealed that: 1. The mean SBS of Var II was significantly higher than the other groups (P<0.05). 2. The mean SBS of Mc and MS were significantly lower than RX (P<0.05).3. The mean SBS of Mc and MS were not significantly different (P>0.05).
Conclusion: Bond strength of the auto-adhesive dual-cured resin cements (RX, Mc, MS) to dentin was lower than Var II composite combined with Ex bond. Bond strength of RX was higher than Mc and MS.
Journal of Mashhad Dental School
Mashhad University of Medical Sciences, School of Dentistry
1560-9286
33
v.
3
no.
2009
183
190
https://jmds.mums.ac.ir/article_1263_1ef9c3a6c25165e88d2bc57f58315407.pdf
dx.doi.org/10.22038/jmds.2009.1263
Investigation of Serum Iron, Zinc and Ferritin Levels in Patients with Recurrent Aphthous Stomatitis Referring to Oral Medicine Department of Zahedan Dental School in 2006
Fatemeh
ArbabiKalati
Assistant Professor, Dept of Oral Medicine, Dental School, Zahedan University of Medical Sciences, Zahedan, Iran
author
AbbasAli
Niazi
Assistant Professor, Dept of General Pathology, Medical School, Zahedan University of Medical Sciences, Zahedan, Iran.
author
Javad
Sarabadani
Assistant Professor, Dept of Oral Medicine, School Of Dentistry and Dental Research Center of Mashhad University of Medical Sciences, Mashhad, Iran
author
Vahideh
Sajedi
Dentist
author
text
article
2009
per
Introduction: Hematologic deficiency appears to be an etiologic factor in some patients with recurrent aphthous stomatitis (RAS). The aim of this study was to investigate serum Iron, Zinc and Ferritin levels in patients with recurrent aphthous stomatitis referring to oral medicine department of Zahedan dental school. Materials & Methods: In this cross sectional analytical study, 30 individuals with aphthous lesions, 17 female and 13 male (case group) and 30 subjects without aphthous lesions, 17 female and 13 male (control group) were selected. All of patients referring to Oral Medicine Department of Zahedan Dental Faculty examined by Oral Medicine Specialist and diagnosis of recurrent aphthous stomatitis were conducted based on clinical criteria including round and symmetrical ulcers that covered by a yellowish white, removable membrane and are less than 1 cm in diameter and heal without scarring and encircled by an erythematous halo. 10 cc blood samples were taken from all the individuals and Iron, Zinc and Ferritin levels of them were measured. For statistical analysis we used Student t-test (P<0.05). Results: This study showed that the average serum Iron level in the case group was 90.92±31.8 mg/dl and in control group was 107.84±39.27 mg/dl. The average serum Ferritin level in the case group was 69.79±54.76 ng/dl and in control group was 87.82±83.92 n/dl. The average serum zinc level in the case group was l17.11±23.52 mg/dl and in the control group was 108.07±41.45 mg/dl. There was no significant difference between the two groups (P>0.05). Conclusion: According to the results, serum Iron, Zinc and Ferritin was not significantly different between the patient and control groups (P>0.05).
Journal of Mashhad Dental School
Mashhad University of Medical Sciences, School of Dentistry
1560-9286
33
v.
3
no.
2009
191
196
https://jmds.mums.ac.ir/article_1264_09e078493a4fe327c161751322a8a2ea.pdf
dx.doi.org/10.22038/jmds.2009.1264
A Comparison of Oral High Dose Amoxicillin with Parenteral Penicillin in Treatment of Acute Oral Infections
Abbas
JavadzadehBolouri
Associate Professor, Dept of Oral Medicine, School of Dentistry and Dental Research Center of Mashhad University of Medical Sciences, Mashhad, Iran
author
Faramrz
Babazadeh
Instructor, Dept of Oral & Maxillofacial Surgery, School of Dentistry & Dental Research Center of Mashhad University of Medical Sciences, Mashhad, Iran
author
Masoud
Shiehzadeh
Postgraduate Student, Dept of Prosthodontics, Dental School, Mashhad University of Medical Sciences, Mashhad, Iran
author
Zohreh
DalirSani
Assistant Professor, Dept of Oral Medicine, School of Dentistry & Dental Research Center of Mashhad University of Medical Sciences, Mashhad, Iran
author
text
article
2009
per
Introduction: Regarding to the difficulties and side effects of parenteral penicillin and considering the positive effects of high dose oral amoxicillin on acute odontogenic infections based on a previous pilot study, we decided to look for a practical and useful alternative treatment for parenteral penicillin. This study was planned to compare therapeutic effect of oral high dose amoxicillin with parenteral penicillin in treatment of acute odontogenic infections.
Materials & Methods: In this clinical trial study, approved by ethical committee of Mashhad University of Medical Sciences, 56 patients with acute odontogenic infection were randomly divided into 2 groups. After obtaining informed consents, Patients in control and case groups were treated, respectively, by parenteral penicillin G and oral amoxicillin (2g three times a day). All of the patients were visited after 24 hour, 48 hour and 1 week intervals and the body temperature, pain intensity, size of the swelling and skin redness were recorded. Our criteria for improvement and responding to the treatment in this study were absence of fever, pain and redness and maximum reduction of swelling. Data were analyzed by Mann-Whitney and Fisher's exact tests through SPSS software (P=0.05).
Results: 25 patients of control and 26 patients of case group were recovered (after 1 week) and no significant difference was found between the two groups (X2=0/0219, P=0.0639).
Conclusion: Our study showed that high dose oral amoxicillin was as effective as parenteral Penicillin G without its side effects such as pain and anaphylaxis and could be considered as an alternative treatment in acute odontogenic infection.
Journal of Mashhad Dental School
Mashhad University of Medical Sciences, School of Dentistry
1560-9286
33
v.
3
no.
2009
197
206
https://jmds.mums.ac.ir/article_1265_2398eeccecf96ce8b94f00ab9f54f0bd.pdf
dx.doi.org/10.22038/jmds.2009.1265
Comparison of Naproxen-Azithromycin Combination with Piroxicam-Azithromycin Combination in Prevention of Complications after Impacted Third Molar Extraction
Afshin
Haraji
Assistant Professor, Dept of Oral and Maxillofacial Surgery, School of Dentistry, Tehran Islamic Azad University, Tehran, Iran
author
Eshagh
Lasemi
Associate Professor, Dept of Oral and Maxillofacial Surgery, School of Dentistry, Tehran Islamic Azad University, Tehran, Iran
author
Reza
Zareh
Assistant Professor, Dept of Oral and Maxillofacial Surgery, School of Dentistry and Dental Research Center of Mashhad University of Medical Sciences, Mashhad, Iran
author
Zahra
Nateghi
Dentist
author
text
article
2009
per
Introduction: According to the large number of surgical removal of impacted third molar and prevalence of pain and side effects and importance of prevention to reduce these side effects and also presence of existing studies which show positive effects of prophylactic use of NSAIDs and antibiotics on healing after surgical removal of teeth and periodontal surgery, the present study was done to evaluate the effect of NSAIDs and antibiotics on pain and side effects after surgical removal of impacted third molar on patients referred to surgical Department of Tehran Azad university and two private surgical clinics in Tehran in 2008-2009.
Materials & Methods: In this double-blind clinical trial study, approved by ethical committee of Azad University of Medical Sciences, 31 patients at the age of 17-27 who were candidate for bilateral impacted third molar extraction with the same difficulty index were recruited. Effects of naproxen-azithromycin combination (case side) and piroxicam-azithromycin combination (control side) were evaluated on pain, edema, dry socket, infection and trismus in different times. Data were analyzed with "Mann Whitney"and "Student t-tests".
Results: From 60 evaluated samples, 24 were from maxilla and 36 were from mandible. Intensity of pain in study groups was lower in control group than the case group (P<0.001). Intensity of edema in study groups was also lower in control group than the case group (P<0.001). Intensity of maximum incisal opening in study groups was higher in control group than the case group (P<0.001). There was no sign of infection in patients but in one of them dry socket was observed.
Conclusion: The result of this study showed that prophylactic use of piroxicam reduced intensity of pain, edema and trismus and it was more effective than naproxen.
Journal of Mashhad Dental School
Mashhad University of Medical Sciences, School of Dentistry
1560-9286
33
v.
3
no.
2009
207
214
https://jmds.mums.ac.ir/article_1266_f5daabbb3f35250a9b428aeb88895ed1.pdf
dx.doi.org/10.22038/jmds.2009.1266
Comparison of Fissure Sealant Microleakage in Isolated State with Different Time Periods of In Vitro Saliva Contamination State
AliReza
Heidari
Assistant Professor, Dept of Pediatric Dentistry, Dental School, Tehran University of Medical Sciences, Tehran, Iran
author
Yaser
Safi
Assistant Professor, Dept of Oral & Maxillofacial Radiology, Dental School, Zahedan University of Medical Sciences, Zahedan, Iran
author
Hossein
Ansari
Instructor, Dept of Epidemiology & Statistics, Faculty of Health, Zahedan University of Medical Sciences, Zahedan, Iran
author
Sahar
Movahed
Dentist
author
text
article
2009
per
Introduction: Fissure sealant therapy is one of the effective methods to prevent dental caries but because of saliva contamination, this method is accompanied by some problems. The aim of this study was to investigate the microleakage of fissure sealant in isolated state in different time periods of contamination with saliva.
Materials & Methods: In this in vitro experimental study, Ninety-two extracted human premolars were investigated in this study. A vertical groove was prepared on the buccal surface of each tooth and then the teeth were divided into four groups with 23 teeth in each group. Sealant therapy was done in isolated condition in the first group. The groove of each tooth in the second group was contaminated with saliva for 5s after washing up acid and then was dried and filled by fissure sealant. The groove of each tooth in the third group was contaminated with saliva for 10s after washing up acid and then was dried and filled by fissure sealant. This process was done for the forth group as well except for the contamination time with saliva which was 15 seconds in this group. Next, the teeth were undergone thermocycling for 2000 cycles. After that, the teeth were immersed in a 0.5% basic fuchsine solution for 24h. Finally, the teeth were sectioned longitudinally in buccal-lingual direction and were examined and a ranked scale was used to score dye penetration. Mann-Whitney and Kruskal-Wallis tests were used for data analysis through SPSS 15 software.
Results: In this study, Group 1 with 60.9% grade 1 leakage (no leakage) showed better results than other groups but statistical analysis did not demonstrate any significant differences in the degree of microleakage of sealants between isolated state and 5 second contamination state (P=0.8).
Conclusion: According to the results of this study, saliva contamination after washing up acid for 5s did not induce any further microleakage.
Journal of Mashhad Dental School
Mashhad University of Medical Sciences, School of Dentistry
1560-9286
33
v.
3
no.
2009
215
222
https://jmds.mums.ac.ir/article_1267_72fe20fe2c1c71f480164c9453f23ca6.pdf
dx.doi.org/10.22038/jmds.2009.1267
Comparison of Flexural Strength of Conventional Brazing & Cast to Techniques in Fixed Partial Dentures Using Base Metal Alloys
Maryam
RezaeiDastjerdi
Assistant Professor, Dept of Prosthodontics, Dental School, Babol University of Medical Sciences, Babol, Iran
author
Jalil
Ghanbarzadeh
Associate Professor, Dept of Prosthodontics, School of Dentistry and Dental Research Center of Mashhad University of Medical Sciences, Mashhad, Iran
author
MohammadReza
Sabuni
Associate Professor, Dept of Prosthodontics, School of Dentistry and Dental Research Center of Mashhad University of Medical Sciences, Mashhad, Iran
author
Kamran
Amirian
Assistant Professor, Dept of Prosthodontics, Dental School, Babol University of Medical Sciences, Babol, Iran
author
Habibollah
Esmaili
Associate Professor, Dept of Biostatistics, School of Medicine and Neonatal Research Center of Mashhad University of Medical Sciences, Mashhad, Iran
author
text
article
2009
per
Introduction: Researches about conventional soldering of base metal alloys have shown that they are unpredictable and too technique sensitive. The objective of this study was the introduction of cast to technique (casting for second time) and comparison of its flexural strength with conventional soldering.
Materials & Methods: In this experimental in vitro study, 30 cylindrical metal patterns with 60mm length and 3mm diameter from base metal alloy "super cast" were prepared. Each was divided into two identical 30mm components by Cr-Co disc and subgrouped into two equal groups (N=30). In the first group, samples were placed on a plaster index with an interplaster distance of 0.3mm. Then this distance was filled with duralay acryl, and soldering process was accomplished on these 15 samples. In the second group, after creating an appropriate undercut at the end of each sample, specimens were attached with Duralay, a 10 gauge sprue with 12mm length was attached in the center of all samples and again the samples were burnout and cast with super cast alloy again. 3 point flexure test with zwick instron testing machine was accomplished and data were analyzed with F & T tests.
Results: The flexure strength comparison of conventional soldering and cast to technique showed that there was no statistical difference between them. According to coefficient of variation, dispersive investigation of flexure strength for both groups was accomplished and showed that in soldering group, it was 1.5 times greater than cast to group.
Conclusion: This study showed that flexural strength of cast to technique was comparable with conventional soldering. However, the results of cast to technique were more predictable than those of conventional soldering.
Journal of Mashhad Dental School
Mashhad University of Medical Sciences, School of Dentistry
1560-9286
33
v.
3
no.
2009
223
230
https://jmds.mums.ac.ir/article_1268_7594a53d79f53b736f9c669ebdeeccca.pdf
dx.doi.org/10.22038/jmds.2009.1268
Analysis of Proinflammatory Cytokines Gene Polymorphisms in Generalized Aggressive Periodontitis (GAgP)
AhmadReza
Ebadian
Dentist
author
Mehrdad
Radvar
Associate Professor, Dep of Periodontology, School of Dentistry and Dental Research Center of Mashhad University of Medical Sciences, Mashhad, Iran.
author
HamidReza
Arab
Associate Professor, Dep of Periodontology, School of Dentistry and Dental Research Center of Mashhad University of Medical Sciences, Mashhad, Iran.
author
Jalil
TavakkolAfshari
Associate Professor, Immunology Research Centre, Bu-Ali Research Institute, Mashhad University of Medical Sciences, Mashhad, Iran
author
Naser
Sargolzaei
Associate Professor, Dep of Periodontology, School of Dentistry and Dental Research Center of Mashhad University of Medical Sciences, Mashhad, Iran.
author
Salman
Gharegozloo
Postgraduate Student, Dep of Endodontics, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
author
Azam
Brook
Postgraduate Student, Master of Science in Biochemistry, Bu-Ali Research Institute, Mashhad University of Medical Sciences, Mashhad, Iran
author
Mojhgan
Shirkhani
Periodontist
author
text
article
2009
per
Introduction: GAgP is a multifactorial disease, which occurs in presence of bacteria and is influenced by genetic and environmental factors; leading to periodontal tissue dysfunction among subjects younger than 30 years. Proinflammatory cytokines are involved in immune response to periodontal pathogens through associating in inflammation phenomenon. It is supposed that gene polymorphisms of cytokines play a role in immune response and therefore in periodontal pathogenesis. In this study we assessed the gene polymorphisms of most important proinflammatory cytokines: Interleukin (IL)-1β +3954 C/T, IL-1α -889 C/T & Tumor necrosis factor-α (TNF-α) -308 G/A.
Materials & Methods: In this case-control study approved by ethical committee of Mashhad University of Medical Sciences, after obtaining arm venous blood samples from patients (n=65) and healthy individuals (n=60) referring to Mashhad dental school, the DNA was extracted in Bu-Ali Research Institute. Restriction fragment length polymorphism- polymerase chain reaction (PCR-RFLP) procedure was performed for determining polymorphisms. Data were analyzed by SPSS software V.15.
Results: IL1β: CT, CC & TT genotypes in patients were 39.6%, 60.4% & 0.0% and in healthy individuals 41.7%, 50% & 8.3%, respectively. IL1α: CT, CC & TT genotypes in patients were 44.6%, 46.2% & 9.2% and in healthy individuals were 46.5%, 51.2% & 2.3%, respectively. TNFα: GA, GG & AA genotypes in patients were 44.8%, 41.4% & 13.8% and in healthy individuals were 46.7%, 50% & 3.3%, respectively. None of the differences was statistically significant.
Conclusion: The lack of any association between the IL-1α, IL-1β, TNF-α polymorphisms and GAgP in the population presented here, brings into doubt the usefulness of these candidate genes as markers of susceptibility to this form of periodontitis.
Journal of Mashhad Dental School
Mashhad University of Medical Sciences, School of Dentistry
1560-9286
33
v.
3
no.
2009
231
240
https://jmds.mums.ac.ir/article_1269_5e3147b565a1f97a4087e18d33e43b4a.pdf
dx.doi.org/10.22038/jmds.2009.1269
Evaluation of the Relationship Between Periodontal Disease and Chronic Obstructive Pulmonary Disease
Kazem
Fatemi
Assistant Professor, Dept of Periodontics, School of Dentistry and Dental Research Center of Mashhad University of Medical Sciences, Mashhad, Iran
author
SayedAli
Banihashemrad
Assistant Professor, Dept of Periodontics, School of Dentistry and Dental Research Center of Mashhad University of Medical Sciences, Mashhad, Iran
author
Mohammad
Tovhidi
Professor, Dept of Respirotery Disease, Ghaem Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
author
SayedHossein
Hosseini
Dentist
author
text
article
2009
per
Introduction: Oral cavity has been recognized as a potential reservoir for respiratory pathogens; so it is necessary to determine the role of oral infections in the occurrence and progression of respiratory infections. Therefore, a study was carried out to evaluate the relationship between periodontal disease and chronic obstructive pulmonary disease (COPD).
Materials & Methods: In this study, 30 hospitalized patients with COPD (case group) were selected. The control group consisted of 30 individuals referred to Mashhad dental school at the same time who did not have any signs and symptoms of respiratory disease. The two groups matched in age, gender and smoking habit. After recording personal information of the patients, probing pocket depth (PPD), loss of attachment (LOA) and bleeding on probing (BOP) were determined in both groups. Finally, the data were compared and analyzed by Kruskal Wallis, Chi square and t-tests.
Results: The mean age of patients in case and control groups were 53±7 and 54±5 years respectively. The number of smokers in the case group was 18 (60%); while there were 19 smokers in the control group (63.3%). The average loss of attachment (LOA) in the case group was 5.72±0.8 mm but it was 3.92±0.5 mm in the control group. The difference was significant (P=0.04). BOP was 86±12 % in the case group and 71±16 % in the control group and there was a significant difference between the two groups (P<0.001). The average of PPD was 4±0.5 mm in the case group and 2.75±0.3 in the control group and there was a significant difference between the two groups (P=0.01).
Conclusion: The data showed that all of the periodontal indices were significantly higher in the case group; It could be concluded that there was a significant relationship between periodontal disease and COPD.
Journal of Mashhad Dental School
Mashhad University of Medical Sciences, School of Dentistry
1560-9286
33
v.
3
no.
2009
241
246
https://jmds.mums.ac.ir/article_1270_71373725558d0cc825f49c7cc704babb.pdf
dx.doi.org/10.22038/jmds.2009.1270
The effect of chewing gums on plaque index in the lack of oral hygiene measures
Maryam
KaramiNogourani
Assistant Professor, Dept of Pediatric Dentistry, Dental School, Khorasgan Islamic Azad University, Khorasgan, Iran
author
Vahid
Esfahanian
Assistant Professor, Dept of Periodontology, Dental School, Khorasgan Islamic Azad University, Khorasgan, Iran
author
MohammadReza
Soltani
Dentist
author
text
article
2009
per
Introduction: Nowadays, chewing gum is one of the frequent habits among people. The goal of this study was to compare the effect of two type chewing gums (with and without sucrose) on dental plaque accumulation in the lack of oral hygiene measures.
Materials & Methods: In this cross over design clinical trial, approved by ethical committee of Azad Khorasegan University of Medical Sciences, plaque accumulation during three 4-day periods (with two week interval) was recorded (Sillness & LÖe Index) in a group of 20 volunteer male dental students, in the absence of normal oral hygiene methods. The stuents were asked to chew sugar-free gum (orbit) during the first4-day period and sugar containing gum (olips) during the second 4-day period and stop chewing during the third period.Participants were asked to chew five gum sticks daily after meals for about twenty minutes. The data were statistically analyzed using One Way ANOVA and LSD tests.
Results: The results showed that both sugar free and sugar containing gums reduced the amount of plaque (P<0.000). The comparison of the mean dental plaque accumulation between the two groups indicated that the effect of the sugar free gum was significantly greater than that of the sugar containing one (P<0.001).
Conclusion: Although sugar free gum is more effective than sugared gum on reducing dental plaque accumulation, chewing sugar containing gum also decreases the level of dental plaque.
Journal of Mashhad Dental School
Mashhad University of Medical Sciences, School of Dentistry
1560-9286
33
v.
3
no.
2009
247
254
https://jmds.mums.ac.ir/article_1271_29598544339da5994050dee657b8e551.pdf
dx.doi.org/10.22038/jmds.2009.1271
Lower Lip Reconstruction with Tongue Flap: A Case Report
Amin
Rahpeima
Assistant Professor, Dept of Oral & Maxillofacial Surgery, School of Dentistry and Dental Research Center of Mashhad University of Medical Sciences, Mashhad, Iran
author
Majid
Eshghpour
Postgraduate Student, Dept of Oral & Maxillofacial Surgery, Dental School, Mashhad University of Medical Sciences, Mashhad, Iran
author
text
article
2009
per
Introduction: Lower lip is one of the most important structures in face aesthetics and function of oral cavity. This vital component is endangered due to trauma destruction caused by malignant lesions and therefore, it is important to restore function and beauty of this important part. The purpose of this study was to present the method of lower lip reconstruction with tongue flap.
Results: A 40 years old woman with large lower lip destruction as a result of car accident was brought to Shahid Kamyab hospital, and reconstruction was done in three phases with the use of a tongue flap.
Conclusion: It is important to be familiar with local flaps, especially tongue flap which has a good blood supply. Using tongue as a donor, it is expected to gain a high rate of success.
Journal of Mashhad Dental School
Mashhad University of Medical Sciences, School of Dentistry
1560-9286
33
v.
3
no.
2009
255
258
https://jmds.mums.ac.ir/article_1272_363cc0ca2839e8a86f0d72f8a8246937.pdf
dx.doi.org/10.22038/jmds.2009.1272