ORIGINAL_ARTICLE
Shear Bond Strength of Orthodontic Brackets to Composite Restorations Using Universal Adhesive
Statement of the Problem: The dental adhesives may have the potential to increase the bond strength of orthodontic brackets to composite resin and it would be highly desirable if adequate bracket-composite bond strength could be yielded by using these adhesives without the need for surface roughening.Purpose: The purpose of this study was to measure the shear bond strength (SBS) of metal brackets to composite restorations by use of a universal adhesive compared with a conventional adhesive.Materials and Method: In this in vitro, experimental study, 45 composite discs measuring 6 mm in diameter and 4 mm in thickness were fabricated and assigned to three groups (n=15). In the group 1, discs were etched with 37% phosphoric acid for 15 seconds and Scotchbond Universal was then applied. Discs were roughened by diamond bur in the group 2 and were subjected to the application of Scotchbond Universal. In the group 3, conventional adhesive (Single Bond 2) was applied after roughening the discs by diamond bur. Metal brackets were then bonded to discs and after thermocycling, the SBS was measured by an Instron machine. The mode of failure and adhesive remnant index (ARI) score were determined using stereomicroscope. Data were analyzed by SPSS version 18, one-way ANOVA, and the Kruskal Wallis test.Results: The surface roughening plus universal adhesive group showed the highest SBS (11.90 MPa) but according to one-way ANOVA, the difference in this regard among the three groups was not statistically significant (p= 0.94). Most samples showed ARI score of 4.Conclusion: Universal adhesive can provide sufficient bond strength as high as that provided by conventional adhesives for orthodontic bracket bonding to composite restorations even in absence of surface roughening by bur.Key Words ● Adhesives ● Composite Resins ● Dental Bonding ● Orthodontic Brackets
https://dentjods.sums.ac.ir/article_44927_88a6d0cce9d4e3cedec60f1ed54252de.pdf
2019-06-01
75
82
10.30476/dentjods.2019.44927
Adhesives
Composite Resins
Dental Bonding
Orthodontic Brackets
Soodeh
Tahmasbi
tahmasbisoodeh@gmail.com
1
Dept. of Orthodontics, Dentofacial Deformities Research Center, Research Institute of Dental Sciences, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
AUTHOR
Mohammadreza
Badiee
mohammadreza.badiee@yahoo.com
2
Dentofacial Deformities Research Center, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
AUTHOR
Maryam
Modarresi
mrmosalla@yahoo.com
3
Dental Student, Dental Research Committee, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
LEAD_AUTHOR
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ORIGINAL_ARTICLE
Relation between Periodontitis and Prediabetic Condition
Statement of the Problem: Prediabetic condition, which is characterized by impaired glucose tolerance, impaired fasting blood glucose, and hemoglobin A1c (HbA1c) higher than normal might be associated with periodontitis. Early diagnosis of this condition might decrease consequent tissue damage caused by periodontitis.Purpose: The present study aimed to evaluate the association between prediabetes and periodontitis.Materials and Method: This cross-sectional study was conducted on 108 prediabetic patients screened by primary fasting blood sugar (FBS) test (100-125 mg/dL). Three subsequent blood tests including FBS, HbA1C, and oral glucose tolerance test (GTT) were performed for ultimate diagnosis of these patients. The periodontal health was evaluated by employing bleeding on probing (BOP), clinical attachment loss (CAL), and plaque index (PI), Löe-Silness gingival index (GI), and pocket depth (PD). Data were analyzed by SPSS version 16, using t-test, ANOVA, and chi-square tests.Results: The sample included 20 (19%) male and 88 (81%) female individuals with mean age of 49 years and mean BMI of 27.5. The mean FBS, GTT, and HbA1C were 107 MG/DL, 137MG/DL, and 5.9%, respectively. Clinical evaluation showed 33% of patients involved with periodontitis. The mean CAL, BOP, PI, PD, GI was 3.7, 0.62, 1.9, 2.1, 1.5, respectively (p < 0.05). A significant difference in periodontal index was found among patients with prediabetes. Moreover, in the patients with periodontitis, a statistically significant relationship between FBS and BMI, BOP and GTT, and finally between CAL and HbA1C was detected.Conclusion: Periodontitis is associated with prediabetic condition. While diabetes is an important risk factor for periodontitis, the risk of periodontitis would be greater if glycemic control is poor. Glycemic control in prediabetic patients can reduce the severity of periodontal disease. Early diagnosis and prevention is crucial to avoid the largely irreversible tissue damage that occurs in periodontitis.Key Words ● Association ● Periodontitis ● Prediabetes ● Diabetes mellitus
https://dentjods.sums.ac.ir/article_44928_06bf70d8321ef9be35ec52953a580a18.pdf
2019-06-01
83
89
10.30476/dentjods.2019.44928
Association
Periodontitis
Prediabetes
diabetes mellitus
Avideh
Maboudi
1
Dept. of Periodontology, School of Dentistry, Diabetes Research Centre, Mazandaran University of Medical Sciences, Sari, Iran.
AUTHOR
Ozra
Akha
2
Diabetes Research Centre, Mazandaran University of Medical Sciences, Sari, Iran.
AUTHOR
Mohadese
Heydari
3
Assistant professor,Dental Implant Research Center,Dentistry Research Institute,Tehran University of Medical Science,Tehran,Iran.
AUTHOR
Reza Ali
Mohammadpour
4
Biostatistics Department, Health Faculty, Diabetes Research Centre, Mazandaran University of Medical Sciences, Sari, Iran.
AUTHOR
Parisa
Gheblehnama
5
General Dentist, Student Research Committee, Mazandaran University of Medical Sciences, Sari, Iran.
AUTHOR
Atena
Shiva
atenashiva@yahoo.com
6
Dept. of Oral and Maxillofacial Pathology, School of Dentistry, Mazandaran University of Medical Sciences, Sari, Iran.
LEAD_AUTHOR
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ORIGINAL_ARTICLE
Radiographic Evaluation of Dental Anomaly Prevalence in a Selected Iranian Population
Statement of the Problem: Many studies have explored the prevalence of dental anomalies, with conflicting results, possibly attributed to differences in the ethnicities of the populations evaluated. Purpose: The aim of this study was to investigate the prevalence of dental anomalies, using panoramic images, in an Iranian population.Materials and Method: In this cross-sectional study, panoramic radiographs of patients aged 18 years or more, between 2015 and 2017 from three private clinics in Babol and Sari, were evaluated for presence or absence of anomalies (tooth shape, number, structure, and position). Data were analyzed using the chi square test, Student’s t-test, and analyses of variance. In this study, p ≤ 0.05 was considered significant.Results: Of 8018 cases examined, anomalies were found in 2250 cases (28.06%), with 95% confidence intervals of 27.08 - 29.0; one, two, and more than two types of anomalies were observed in 1968 (24.5%), 267 (3.3%), and 15 (0.2%) cases, respectively. Root dilaceration was the most prevalent anomaly (7.7%), followed by dens invaginatus (3.8%). Impaction was observed with a prevalence of 15.2%. Impaction, dens invaginatus, and missing teeth were significantly more prevalent in women than in men, whilst supernumerary teeth and hypercementosis were more common in men than in women (p < 0.05).Conclusion: Regarding the relatively high prevalence of dental anomalies such as root dilacerations and dens invaginatus, it is essential to consider these anomalies carefully in treatment decision-making.Key Words ● Radiography ● Anomalies ● Teeth ● Prevalence ● Root
https://dentjods.sums.ac.ir/article_44929_dc9e11464ea4f2f9f3bb025fcd6d94fd.pdf
2019-06-01
90
94
10.30476/dentjods.2019.44929
Radiography
Anomalies
Teeth
Prevalence Root
Sina
Haghanifar
dr_haghanifar@yahoo.com
1
Dept. of Oral & Maxillofacial Radiology, School of Dentistry, Babol University of Medical Sciences, Babol, Iran
LEAD_AUTHOR
Ehsan
Moudi
emoudi@yahoo.com
2
Dept. of Oral and Maxillofacial Radiology, College of Dentistry, Babol University of Medical Sciences, Mazandaran, Iran.
AUTHOR
Farida
Abesi
faridaabesi@yahoo.fr
3
Dept. of Oral and Maxillofacial Radiology, College of Dentistry, Babol University of Medical Sciences, Mazandaran, Iran.
AUTHOR
Farzaneh
Kheirkhah
farizaneh.kh@yahoo.com
4
Dept. of Oral and Maxillofacial Radiology, College of Dentistry, Babol University of Medical Sciences, Mazandaran, Iran.
AUTHOR
Nazanin
Arbabzadegan
n.arbabzadegan@gmail.com
5
Dept. of Oral and Maxillofacial Radiology, College of Dentistry, Babol University of Medical Sciences, Mazandaran, Iran.
AUTHOR
Ali
Bijani
alibijani@yahoo.com
6
Communicable Pediatric Disease Research Center, Babol University of Medical Sciences, Mazandaran, Iran.
AUTHOR
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ORIGINAL_ARTICLE
Orthodontic Treatment Need and Complexity among 13-15 Year-Old Schoolchildren in Kerman, Iran
Statement of the Problem: Effective and informed planning for orthodontic services in any population requires assessment of the orthodontic treatment need and complexity.Purpose: The present cross-sectional study was conducted to assess these parameters using index of complexity, outcome, and need (ICON) in an Iranian schoolchildren population. Materials and Method: In total, 600 randomly selected individuals (300 girls, 300 boys; aged 13-15 years) participated in this study. The treatment need (ICON score>43) and the grades of complexity were compared between two genders and in different age groups. Descriptive statistics and Chi-square test were applied for data analysis considering p < 0.05.Results: Out of 45% of the population found in need for orthodontic treatment, there was no significant difference between the two genders, but the 15-year-old individuals needed treatment significantly more than the individuals with 13 and 14 years of age. The mean ICON score was 44.3±20.28, which showed no significant difference between the two genders. The majority of the cases (34%) were categorized in the easy compartment in terms of complexity and 18% had difficult or very difficult grades of complexity. The genders and age groups exhibited no significant difference in terms of the complexity grade.Conclusion: Although half of the studied cases needed treatment, nearly one-fifth had difficult or very difficult complexity grade, which indicates the need for specialist care.Key Words ● Orthodontic treatment needs ● Complexity ● Index of Complexity Outcome and Need (ICON)
https://dentjods.sums.ac.ir/article_44930_657a576f7cafa8507354fb89ab06a312.pdf
2019-06-01
95
101
10.30476/dentjods.2019.44930
Orthodontic treatment needs
Complexity
Index of Complexity Outcome and Need (ICON)
Mahsa
Kalantari
1
Oral and Dental Diseases Research Center, Dept. of Oral and Maxillofacial Pathology, School of Dentistry, Kerman University of Medical Sciences, Kerman, Iran.
AUTHOR
Hosnieh
Ziaalddini
2
Oral and Dental Diseases Research Center, Dept. of Orthodontics, School of Dentistry, Kerman University of Medical Sciences, Ker-man, Iran.
AUTHOR
Mohammadreza
Jaffari
3
Dentist, Kerman, Iran.
AUTHOR
Parisa
Kalantari
4
Postgraduate student, Dept. of Orthodontics, School of Dentistry, Kerman University of Medical Sciences, Kerman, Iran.
LEAD_AUTHOR
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ORIGINAL_ARTICLE
Effect of the of Zeolite Containing Silver-Zinc Nanoparticles on the Push out Bond Strength of Mineral Trioxide Aggregate in Simulated Furcation Perforation
Statement of the Problem: Recently, zeolite has been regarded to improve the properties of dental materials such as mineral trioxide aggregate (MTA).Purpose: The aim of the present study was to evaluate the effect of incorporating zeolite/silver/zinc (Ze/Ag/Zn) composite at 2 wt% to MTA powder on the push-out bond strength in simulated furcation perforations.Materials and Method: Furcal perforations, measuring 1.3 mm in diameter and 2 mm in height, were simulated in 40 human mandibular first molars. The samples were allocated to two groups (n=20) based on the material used for the repair of perforations. In the group 1, MTA and in the group 2, MTA plus Ze/Ag/Zn (2%) was used. The samples were incubated at 37°C for 1 week. Then the universal testing machine was employed to measure bond strength. The resistance of materials to dislodgment was recorded in MPa. Data were analyzed using t-test. Statistical significance was set at p < 0.05.Results: The push-out bond strength in the group 1 (6.40±1.98 MPa) was significantly higher than that in the group 2 (2.1±0.6 MPa) with p= 0.001.Conclusion: Under the limitations of the present study, it can be concluded that incorporation of Ze/Ag/Zn at 2 wt% to MTA powder had a negative effect on the push-out bond strength. Key Words ● Bond strength ● MTA ● Nanoparticles ● Push out ● Zeolite
https://dentjods.sums.ac.ir/article_44919_f710c589085393c2af273a7c11e9e9b6.pdf
2019-06-01
102
106
10.30476/dentjods.2019.44919
Bond Strength
MTA
Nanoparticles
Push out
Zeolite
Negin
Ghasemi
neginghasemi64@gmail.com
1
Dept. of Endodontics, Dental and Periodontal Research Center, Dental Faculty, Golgasht Street, Tabriz University of Medical Sciences, Tabriz, Iran.
AUTHOR
Saeed
Rahimi
rahimidarehchi@yahoo.com
2
Dept. of Endodontics, Dental and Periodontal Research Center, Dental Faculty, Golgasht Street, Tabriz University of Medical Sciences, Tabriz, Iran.
AUTHOR
Mohamad
Samiei
samiei.moh@gmail.com
3
Dept. of Endodontics, Dental and Periodontal Research Center, Dental Faculty, Golgasht Street, Tabriz University of Medical Sciences, Tabriz, Iran.
AUTHOR
Mehrnoosh
Mohamadi
mehrnushmohamadi111@gmail.com
4
Dept. of Endodontics, Dental and Periodontal Research Center, Dental Faculty, Golgasht Street, Tabriz University of Medical Sciences, Tabriz, Iran.
LEAD_AUTHOR
Yashar
Rezaei
dr.yrezaei@yahoo.com
5
Dept. of Dental Biomaterials, Dental Faculty, Tabriz University of Medical Sciences, Golgasht Street, Tabriz, Iran.
AUTHOR
Baharak
Divband
baharakdivband@yahoo.com
6
Dept. of Chemistry, Tabriz University, Tabriz, Iran.
AUTHOR
Negin
Farhangi
neginfarhangi@gmail.com
7
Student of Dentistry, Dental Faculty, Tabriz University of Medical Sciences, Golgasht Street, Tabriz, Iran.
AUTHOR
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20
ORIGINAL_ARTICLE
Oro-Antral Fistula Repair With Different Surgical Methods: a Retrospective Analysis of 147 Cases
Statement of the Problem: An oro-antral fistula (OAF) creates a passage for oral microbes into maxillary sinus with numerous possible complications.Purpose: This retrospective study evaluates the success of three different surgical techniques of OAF repair.Materials and Method: Records of patients that were treated for OAF repair were retrieved and reviewed. Data recorded were patients’ age, gender, etiology, size, location, duration, and method of repair. According to the surgical technique used to repair the OAF, patients were divided into three groups including buccal flap, palatal flap, and buccal fat pad. All of the patients were locally anesthetized with 2% lidocaine and 1/100000 or 1/80000 epinephrine. Then the edges of the fistula were excised and fistula wall was dissected in a stitched layer by three surgical methods. The three groups were compared concerning the success or failure of surgical technique based on complete closure of OAF after three months postoperatively.Results: 147 patients (116 males and 31 females) with adequate records were included in the study. The surgical methods used in patients were, buccal flap in 59 (40.1%), buccal fat pad in 42 (40.8%), and palatal flap in 28 (19%) individuals. Success rates of these techniques were significantly different. Buccal fat pad was the most successful flap (98.3%), followed by buccal flap (89.8%), and palatal flap (85.7%). The most common cause of OAF in this group of patients was dental extraction.Conclusion: Buccal fat pad flap seems to be one of the best treatments for the closure of OAF lager than 5 mm.Key Words ● Fat Pad ● Maxillary Sinus ● Oroantral Fistula ● Surgical Flaps
https://dentjods.sums.ac.ir/article_44920_99d72c51ff5313cbb6e6fca6cd2aa49b.pdf
2019-06-01
107
112
10.30476/dentjods.2019.44920
fat pad
Maxillary sinus
Oroantral Fistula
Surgical flaps
Rasoul
Gheisari
gheisari_r@yahoo.com
1
Dept. of Oral and Maxillofacial Surgery, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
AUTHOR
Hesam
Hosein Zadeh
2
Dental Student, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
AUTHOR
Saeid
Tavanafar
s.tavanafar@gmail.com
3
Postgraduate Student, Dept. of Oral and Maxillofacial Surgery, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
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ORIGINAL_ARTICLE
Demographic Evaluation of Oro-Dental Self-Injury for Insurance Deception; Evaluation of the Cases Referred to Shiraz Forensic Medicine Center
Statement of the Problem: Nonsuicidal self-inflicted injuries are socially unacceptable and may cause mild to severe damages.Purpose: This study aimed to evaluate the demographic features of the subjects with orodental self-injuries referred to a forensic medicine center in Shiraz, Iran.Materials and Method: This cross-sectional study evaluated 51 participants (49 men and 2 women) with orodental injuries referred to forensic medicine administration. Orodental self-injury was detected in the subjects, based on the last forensic criterion of self-injuries, considering their history, clinical examinations, and panoramic radiographs.Results: The findings of this study revealed that dental self-injuries were more prevalent among married men from urban areas with secondary education levels. Most of the cases were due to the monetary compensation received. In the majority of cases, a hard object was used for this self-injury. Moreover, no statistical association was observed between the economic status and orodental self-injury.Conclusion: This study concluded that dental self-injury could be regarded as an unplanned incident because no significant correlation was observed between the participants, their economic status, and the type of dental trauma. Furthermore, detailed investigations on the latent variables are required.Key Words ● Self- Injurious Behavior ● Legal medicine ● Insurance ● Compensation and Redress
https://dentjods.sums.ac.ir/article_44921_bee3da8c9a0a2e59cfc79df67a74cb87.pdf
2019-06-01
113
117
10.30476/dentjods.2019.44921
Self- Injurious Behavior
Legal medicine
insurance
Compensation and Redress
Mohammad Mehdi
Shokouhi
shokohi1357@yahoo.com
1
Dept. of Endodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
AUTHOR
Mohammad
Zarenezhad
2
Researcher of Iranian Legal Medicine Research Center, Legal Medicine Organization, Tehran, Iran.
LEAD_AUTHOR
Saeid
Gholamzadeh
3
Researcher of Iranian Legal Medicine Research Center, Legal Medicine Organization, Tehran, Iran.
AUTHOR
Fereshte
Sobhnamayan
sobhf@sums.ac.ir
4
Dept. of Endodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
AUTHOR
Mohammad Javad
Talebi
5
Undergraduate Student, Students' Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
AUTHOR
Abbas
Abbaszadegan
dr.abbaszadegan@gmail.com
6
Dept. of Endodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
AUTHOR
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ORIGINAL_ARTICLE
Shear Bond Strength of a Multi-Mode Adhesive to Bur-Cut and Er,Cr:YSGG Lased Dentin in Different Output Powers
Statement of the Problem: Universal or multi-mode adhesives are new adhesive systems that can be used in both etch-and-rinse (ER) and self-etch (SE) modes. Lesser technical sensitivity and dual use of these adhesives have made them popular among dentists. Studies are being conducted to analyze the advantages and disadvantages these adhesives in different conditionsPurpose: The aim of this study was to compare shear bond strength (SBS) of a multi-mode adhesive in different etching modes to Er,Cr:YSGG laser ablated and bur-cut dentin.Materials and Method: Buccal and lingual surfaces of 30 sound human molars, randomly divided to three groups, were prepared by bur and Er,Cr:YSGG (4 Watt and 5 Watt, 20 Hz, 96% water, 60% air, and 600-µm spot size) to reach a flat surface in superficial dentin. Each group was randomly divided into 2 subgroups (ER and SE), and then Scotchbond Universal adhesive was applied. Composite cylinders were attached to the surfaces and cured. Specimens were stored in 37 °C water for 24 hours and thermocycled (500 cycles) and were tested for SBS and failure modes were determined by stereomicroscope. Data was analyzed using SPSS19 and one- way ANOVA and Tukey’s post hoc tests and p < 0.05 was considered as significance level.Results: Bur-cut dentin with ER method had the highest mean SBS value (33.80 MPa). SBS in bur-cut and 4Watt laser in ER mode were significantly higher than SE mode (p= 0.002 and p= 0.000 respectively). Highest mean SBS value in lased dentin was achieve in 4 Watt ER mode.Conclusion: SBS of Scotchbond universal adhesive to dentine is highest in bur-cut and ER mode and in 4-Watt lased-dentin is higher than 5-Watt lased-dentin. Moreover, in 4-Watt lased-dentin, SBS of ER mode is more than SE mode.Key Words ● Adhesive ● Bond Strength, Laser ● Dentin
https://dentjods.sums.ac.ir/article_44922_60fb4009cad2a41d38d53d74c6d2fc2d.pdf
2019-06-01
118
123
10.30476/dentjods.2019.44922
Adhesive
Bond Strength
Laser
Dentin
Niloofar
Shadman
niloo_shad@yahoo.com
1
Dept. of Operative Dentistry, Oral and Dental Diseases Research Center, School of Dentistry, Kerman University of Medical Sciences, Kerman, Iran.
AUTHOR
Shahram
Farzin Ebrahimi
s.farzinebrahimi@gmail.com
2
Dept. of Operative Dentistry, Oral and Dental Diseases Research Center, School of Dentistry, Kerman University of Medical Sciences, Kerman, Iran.
AUTHOR
Sara
Amanpour
saraamanpour@gmail.com
3
Dept. of Oral Pathology, Oral and Dental Diseases Research Center, School of Dentistry, Kerman University of Medical Sciences, Kerman, Iran.
AUTHOR
Siavash
Mehdi Zadeh
siavash.mzadeh@yahoo.com
4
Postgraduate Student, Dept. of Oral and Maxillofacial Surgery, School of Dentistry, Kerman University of Medical Sciences, Kerman, Iran.
LEAD_AUTHOR
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31
ORIGINAL_ARTICLE
The Effect of Incorporation of 0.5 %wt. Silica Nanoparticles on the Micro Shear Bond Strength of a Resin Modified Glass Ionomer Cement
Statement of the Problem: The clinical success of glass ionomer restorations depends on the strength of resin-modified glass ionomer (RMGI) cement bonding to dentin and there is limited information available regarding the bond strength of resin modified glass ionomers containing silica nanoparticles to dental structures.Purpose: The aim of this study was to compare the microshear bond strength (µSBS) of RMGI with and without silica (SiO2) nanoparticles to dentin of permanent teeth.Materials and Method: in this experimental study, the occlusal surfaces of 30 freshly extracted intact third molars were ground to expose the flat dentin and after conditioning with 20% poly acrylic acid, were randomly assigned to two main groups (n=15). The first group was filled with RMGI (Fuji II LC, GC) and the second group was filled with RMGI plus 0.5%wt. silica nanoparticles. Then, each main group was divided into three subgroups, and then stored in an incubator at 37 oC with 100% humidity for 1, 7, and 30 days. The µSBS test was performed using a universal testing machine (1 mm/min). The data were analyzed by t-test, repeated measures ANOVA and Tukey test (p < 0.05).Results: There were no statistically significant differences between the mean µSBS of the groups with and without nanoparticles along the different storage periods (p> 0.05). There was significant difference in µSBS values among the three different storage periods in all the tested materials (p < 0.05).Conclusion: Incorporation of 0.5 %wt. silica nanoparticles did not compromise the µSBS of Fuji II LC RMGI to dentin.Key Words Glass Ionomer; Silica; Nanoparticles ; Shear Strength
https://dentjods.sums.ac.ir/article_44923_f3be547fa836ee6d22b0bfae727a4eae.pdf
2019-06-01
124
130
10.30476/dentjods.2019.44923
glass ionomer
Silica
Nanoparticles
Shear strength
Mohammad Bagher
Rezvani
mbrezvani@yahoo.com
1
Dept. of Operative Dentistry, School of Dentistry, Shahed University, Tehran, Iran.
AUTHOR
Mohammad
Atai
2
Dept. of Polymer Science, Iran Polymer and Petrochemical Institute, Tehran, Iran.
AUTHOR
Hamid
Safar Alizade
3
General Dentist, Private Practice, Tehran, Iran.
AUTHOR
Mahshid
Mohammadi Basir
mohammadibasir@shahed.ac.ir
4
Dept. of Operative Dentistry, School of Dentistry, Shahed University, Tehran, Iran.
AUTHOR
Fatemeh
Koohpeima
koohpeima.f@gmail.com
5
Dept. of Operative Dentistry, Biomaterials Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
AUTHOR
Saba
Siabani
s_siabani@sums.ac.ir
6
General Dentist and Dental Specialties Candidate, Dept. of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
LEAD_AUTHOR
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ORIGINAL_ARTICLE
Tensile Bond Strength of Three Custom-made Tooth-Colored Implant Superstructures to Titanium Inserts
Statement of the Problem: Hybrid abutments are made of a titanium implant insert and a ceramic component. The tensile bond strength between the titanium implant insert and the ceramic component is not still clearly known.Purpose: This in vitro study aimed to compare the tensile bond strength of the titanium insert to ceramic components made of milled lithium disilicate, milled zirconia, and pressable lithium disilicate.Materials and Method: To standardize the shape and dimension of the ceramic components, a single computer-aided design/computer assisted manufacturing (CAD/CAM) superstructure was designed with Dental Designer software. Based on this model, CAD milled zirconia (Zr), CAD milled Lithium disilicate (CAD-LD) and heat-pressed lithium-disilicate (H-LD) superstructures were fabricated (n=10 per group). They were bonded to the titanium inserts by using self-adhesive resin cement. The prepared superstructure-titanium insert complexes (hybrid abutments) were screwed into the implants with 35 Ncm torque. The tensile bond strength of the ceramic superstructures to the titanium inserts were recorded by the universal testing machine with a crosshead speed of 2 mm/min. The data were analyzed by using one-way ANOVA and Tamhane post-hoc test (p < 0.05).Results: The mean±SD of tensile bond strength was 328.50±30.4 N in CAD-LD, 257.30±23.8 N in H-LD, and 242.20±21.2 N in Zr groups. One-way ANOVA revealed the groups significantly different in terms of the tensile bond strength (p < 0.001). Tamhane post-hoc test showed a significant difference between the CAD-LD and the two other groups (p <0.001); however, no statistically significant difference was detected between the H-LD and Zr groups (p= 0.39).Conclusion: It can be concluded that the CAD-LD has higher bond strength to titanium insert compared with the H-LD and Zr groups. Therefore, they might be clinically more beneficial in high-esthetic areas.Key Words ● Bond strength ● Implant ● Lithium disilicate ● Zirconia
https://dentjods.sums.ac.ir/article_44924_83dcbc525daaefbbbacf86a531ce2e42.pdf
2019-06-01
131
136
10.30476/dentjods.2019.44924
Bond Strength
Implant
Lithium disilicate
Zirconia
Mitra
Zirak
1
Postgraduate Student, Dept. of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
AUTHOR
Mahroo
Vojdani
vojdanim@sums.ac.ir
2
Dept. of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
AUTHOR
Amir Ali Reza
Khaledi
shekoofehshaykhian@gmail.com
3
Dept. of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
LEAD_AUTHOR
Mitra
Farzin
farzinmitra@yahoo.com
4
Dept. of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
AUTHOR
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ORIGINAL_ARTICLE
Towards a New Era in the Management of Large Periapical Lesion in Permanent Tooth Using Stemcells: A 2-Year Clinical Application Report
Stem cells are considered as the principal source of differentiated cells. In the past few years, the research on the stem cell in various fields had shown success, but the stem cell-based therapies in the dentistry had confined to a particular extent. The present case report was aimed to evaluate the efficacy of stem cells from human exfoliated deciduous teeth (SHED) in the management of a large periapical lesion. A 12-year-old girl reported with a chief complaint of pain in the lower right back tooth region since 5 days. Intraoral examination revealed a deep occlusal cavity in relation to tooth#46 with tenderness on percussion. Radiograph examination revealed periapical radiolucency measuring 1.8×1.0cm in size with perforation at the floor of the pulp chamber in relation to 46. A deciduous tooth from the same child was collected to isolate stem cells. After access opening for tooth #46, pulp was extirpated and a thick mucoperiosteal flap was raised. This was followed by homing of SHED into the periapical area through the window created in the buccal cortical plate and into the root canals of tooth #46 until the orifice. The access cavity was sealed with glass ionomer cement. The patient was subjected to evaluation at regular intervals i.e., two weeks, four months, twelve months, and twenty-four months. The case treated demonstrated complete resolution of periapical radiolucency in the fourth-month review with a positive response to electric pulp testing. This clinical application report concludes that SHED can be effective in treating the periapical lesions in permanent teeth.Key Words ● Periapical Diseases ● Permanent Dentition ● Dental Pulp ● Dental Pulp Test ● Stem Cells ● Scaffold
https://dentjods.sums.ac.ir/article_44925_ae0ac21bfad34a5fcf4eeffa86863ecf.pdf
2019-06-01
137
140
10.30476/dentjods.2019.44925
Periapical Diseases
Permanent Dentition
Dental pulp
Dental Pulp Test
stem cells
Scaffold
Madu
Ghanashyam Prasad
1
Dept. of Pedodontics and Preventive Dentistry, St. Joseph Dental College, Eluru, India.
LEAD_AUTHOR
Juvva
Ramakrishna
2
Dept. of Pedodontics and Preventive Dentistry, St. Joseph Dental College, Eluru, India.
AUTHOR
Duvvi
Naveen Babu
naveenduvvi@gmail.com
3
Dept. of Biochemistry, St. Joseph Dental College, Eluru, India.
AUTHOR
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16
ORIGINAL_ARTICLE
Intra- Socket Transplantation of Bicuspid to Re-establish Biologic Width
Transplantation and reposition of a tooth in its socket is relatively simple and predictable and can be considered as an alternative treatment option particularly in patients with financial limitation.This report describes a case of intra- alveolar transplantation of tooth #43 in a 35- year-old man. Clinical and radiographic examinations revealed tooth #43 with complicated crown-root fracture that had undergone endodontic treatment five months earlier. Reposition of mandibular bicuspid in its socket to re-establish biologic width and crown ferrule is an alternative treatment in cases with complicated crown-root fracture. Immediate replantation preserve viability of periodontal ligament cells and fibers attachment and good chance of healing is predicted.Key Words ● Intra- socket transplantation ● Replantation ● Surgical extrusion ● Re-establish biologic width
https://dentjods.sums.ac.ir/article_44926_043624a68917a900ef7c426f901a9782.pdf
2019-06-01
141
144
10.30476/dentjods.2019.44926
Intra- socket transplantation
Replantation
Surgical extrusion
Akbar
Khaiat
khaiatakbar@gmail.com
1
Dept. of Endodontic, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
LEAD_AUTHOR
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