Shahid Beheshti University Dental Journal最新文献

The Effects of Propolis on Discoloration of Teeth 蜂胶对牙齿变色的影响

Shahid Beheshti University Dental Journal Pub Date : 2020-02-18 DOI: 10.22037/JDS.V31I1.28642

Z. Ahangari, A. Ghassemi, Sayna Shamszadeh, M. Naseri

{"title":"The Effects of Propolis on Discoloration of Teeth","authors":"Z. Ahangari, A. Ghassemi, Sayna Shamszadeh, M. Naseri","doi":"10.22037/JDS.V31I1.28642","DOIUrl":"https://doi.org/10.22037/JDS.V31I1.28642","url":null,"abstract":"Objective: Propolis is a resinous material produced by honeybees that has recently gained fame as an antimicrobial agent. This study sought to assess the effects of propolis as an intra-canal medicament on tooth discoloration. The effect of its application technique on the degree of discoloration was investigated as well. Methods: This experimental study was conducted on 40 intact anterior human teeth. After access cavity and canal preparation, the teeth were randomly divided into three groups. In group A, propolis was placed inside the canals and pulp chamber. In group B, propolis was used as an intracanal medicament. Group C was considered as the control group and saline solution was injected into the canals. Labial surfaces of all teeth were digitally photographed using a digital camera (Fujifilm at one day, one week, 2 weeks, one month and 2 months time points. Color of teeth was assessed and measured at incisal, middle, and cervical segments using the CIELab system and Photoshop software. Collected data at different time points were statistically analyzed. Results: The overall color change in the two groups of A and B was significantly different from the control group (P<0.001). Significant changes in color were also noticed in follow up sessions in groups A and B (P<0.001). At 2 months, the difference in overall color change between incisal, middle and cervical thirds of teeth in groups A and B was not statistically significant. Conclusion: Based on the obtained results, application of propolis as an intracanal medicament can lead to clinical color changes in tooth crown. Its application technique has no effect on the degree of discoloration.","PeriodicalId":21563,"journal":{"name":"Shahid Beheshti University Dental Journal","volume":"5 1","pages":"33-41"},"PeriodicalIF":0.0,"publicationDate":"2020-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82848391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Dimensional Accuracy of Polyvinyl Siloxane Impression Materials Considering Impression Techniques– A Literature Review 考虑压模技术的聚乙烯醇硅氧烷压模材料尺寸精度的文献综述

Shahid Beheshti University Dental Journal Pub Date : 2019-03-10 DOI: 10.22037/JDS.V37I1.27171

Nadia Nouri, P. Amini, R. Amini, Mohammad Mousavi, Sajad Raeisi Estabragh, Abdola Ebrahimi

{"title":"Dimensional Accuracy of Polyvinyl Siloxane Impression Materials Considering Impression Techniques– A Literature Review","authors":"Nadia Nouri, P. Amini, R. Amini, Mohammad Mousavi, Sajad Raeisi Estabragh, Abdola Ebrahimi","doi":"10.22037/JDS.V37I1.27171","DOIUrl":"https://doi.org/10.22037/JDS.V37I1.27171","url":null,"abstract":"Objectives Impression accuracy is the main determinant of the fit, form and function of prosthetic restorations. Polyvinyl siloxane (PVS) is the material of choice in most clinical situations. The purpose of this paper is to provide an up-to-date review of scientific articles which discuss the dimensional accuracy of PVS impression material using various impression techniques, tray types and spacers. Besides, the procedure, advantages and disadvantages of commonly used impression techniques, technique modifications and innovations are also reviewed. Method An electronic search of scientific papers from 1990 to 2018 was carried out using MEDLINE and Google Scholar databases using the search terms “accuracy and polyvinyl siloxane and impression technique” and “accuracy and addition silicone and impression technique”. Results Searching the key words yielded a total of 312 articles. By application of inclusion and exclusion criteria, the obtained results were further reduced to 35 citations. Conclusion Impression technique is a critical variable in the accuracy of PVS impressions. Dual-phase 2-step technique with 1 to 2 mm space for the light body is proven to be highly accurate and is still considered as the standard technique. The use of 2-step technique without providing a space for the wash material is rejected by the literature. Triple-phase 2-step techniques including “matrix impression system” have also functioned well and even superior to traditional dual-phase 2-step technique. Papers suggest that custom trays do not significantly improve the accuracy of impressions and rigid stock trays are suitable alternatives","PeriodicalId":21563,"journal":{"name":"Shahid Beheshti University Dental Journal","volume":"25 1","pages":"32-39"},"PeriodicalIF":0.0,"publicationDate":"2019-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82691229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Evaluation of Root Canal Morphology and Root Apex Anatomy of Mandibular Premolars in an Iranian Population: an ex-vivo study 伊朗人群下颌前磨牙根管形态和根尖解剖的评价:离体研究

Shahid Beheshti University Dental Journal Pub Date : 2019-03-10 DOI: 10.22037/JDS.V37I1.27170

M. Naseri, M. A. Mozayeni, Nahid Adelkhani, A. Gohari

{"title":"Evaluation of Root Canal Morphology and Root Apex Anatomy of Mandibular Premolars in an Iranian Population: an ex-vivo study","authors":"M. Naseri, M. A. Mozayeni, Nahid Adelkhani, A. Gohari","doi":"10.22037/JDS.V37I1.27170","DOIUrl":"https://doi.org/10.22037/JDS.V37I1.27170","url":null,"abstract":"Objectives Adequate knowledge about canal anatomy is necessary for clinicians to prevent any damage to the periodontium. The aim of this study was to evaluate the canal and apical complexities of the mandibular first and second premolars in an Iranian population. Methods One-hundred mandibular first (n=50) and second (n=50) premolars were collected. After access cavity preparation, 2% methylene blue was injected into the canals, and they were sealed with Coltosol and nail varnish. Next, demineralization and clearing with 5% nitric acid and methyl salicylate were performed. Apical morphology including the presence of accessory canals, apical delta, anastomoses and canal configurations was evaluated under a stereomicroscope at x16 magnification. Descriptive statistics (including tables, central tendency and dispersion tests) were used for data analysis. Results The most prevalent form of canal type was Vertucci’s type I in first and second premolars. The mean distance between the apical foramen and anatomic apex, apical foramen and apical constriction, and apical constriction and anatomic apex was 0.3, 0.6 and 0.9 mm, respectively for the first premolars. These values were 0.3, 0.5 and 0.8 mm, respectively for the second premolars. Conclusion Although most mandibular premolars have one canal, using appropriate cleaning methods is imperative because of high prevalence of accessory canals, anastomoses and apical deltas. First premolars pose more challenges in this respect","PeriodicalId":21563,"journal":{"name":"Shahid Beheshti University Dental Journal","volume":"75 1","pages":"11-16"},"PeriodicalIF":0.0,"publicationDate":"2019-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89908141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of salivary level of leptin in chronic periodontitis patients and healthy controls 慢性牙周炎患者与健康对照者唾液瘦素水平的比较

Shahid Beheshti University Dental Journal Pub Date : 2019-03-10 DOI: 10.22037/JDS.V37I1.27172

Z. Esfahrood, Mehrdad Ehghaghi, A. Lafzi, Z. Yadegari, Maryam Kardan

引用次数: 0

D-1 Gene Polymorphism in Salivary Gland Tumors 唾液腺肿瘤的D-1基因多态性

Shahid Beheshti University Dental Journal Pub Date : 2019-03-10 DOI: 10.22037/JDS.V37I1.27167

J. Ghapanchi, Behnam Samavatian, H. Ghaderi, B. Khademi, Elham Mahmoudi Maymand, E. Ainy

{"title":"D-1 Gene Polymorphism in Salivary Gland Tumors","authors":"J. Ghapanchi, Behnam Samavatian, H. Ghaderi, B. Khademi, Elham Mahmoudi Maymand, E. Ainy","doi":"10.22037/JDS.V37I1.27167","DOIUrl":"https://doi.org/10.22037/JDS.V37I1.27167","url":null,"abstract":"Objectives This study aimed to assess PD-1gene polymorphism in salivary gland tumors in patients referred to Khalili Hospital in Shiraz. Methods This case-control study evaluated 48 patients with salivary gland tumors and 100 age- and sex-matched healthy controls. First, 5cc blood samples were obtained from patients and transferred to vials containing anti-coagulated EDTA. DNA was extracted, and polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) was performed on the samples. The PD-1 gene genotype was determined using the Fermentas kit. After 24 hours of incubation, all the samples were electrophoresed. The genotypes were reported based on the size of bands, and the chi-square test was applied. To compare the alleles, the Fisher’s Exact test was applied. The Yates correction was used to compare the genotype and genotypic alleles based on the tumor grade. Results The mean age was 44.81±15.69 years in patients and 46.54± 13.86 years in controls. Statistical analysis did not show any significant difference in PD1 gene polymorphism between the two groups (P=0.098). No significant correlation was found between the genotype frequency and lymph node involvement (P=0.06), tumor genotype (P=0.12), side (right or left) (P=0.22), tumor location (P=0.27), and size or invasion of the tumor to the surrounding tissue (P=0.14). PD1.3 genotype frequency did not differ significantly between malignant and benign tumors (P=0.6). Conclusion This study did not reveal any significant difference in genotype frequency of PD1.3 in the patient and control groups; however, further studies are needed with a larger sample size to obtain more accurate results.","PeriodicalId":21563,"journal":{"name":"Shahid Beheshti University Dental Journal","volume":"60 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82590327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Orthodontic Management of a Severely Rotated Maxillary Central Incisor with a Modified Whip Appliance in Mixed Dentition Period 改良鞭状矫治器对混合牙列期上颌中切牙严重旋转的矫治

Shahid Beheshti University Dental Journal Pub Date : 2019-03-10 DOI: 10.22037/JDS.V37I1.27173

N. Sinaee, Mohammad Mousavi, Nadia Nouri

{"title":"Orthodontic Management of a Severely Rotated Maxillary Central Incisor with a Modified Whip Appliance in Mixed Dentition Period","authors":"N. Sinaee, Mohammad Mousavi, Nadia Nouri","doi":"10.22037/JDS.V37I1.27173","DOIUrl":"https://doi.org/10.22037/JDS.V37I1.27173","url":null,"abstract":"Objectives Tooth rotation is one of the most prevalent dental anomalies. Early management of rotated teeth would prevent possible occlusal interferences. The purpose of this case report was to introduce a fixed-removable appliance, which can efficiently correct severely rotated anterior teeth in a short duration of time in mixed dentition period. Case A 7-year-old boy with a Class I malocclusion was referred to the Orthodontics Department, School of Dentistry at Kerman University of Medical Sciences with the chief complaint of severe rotation of one of his maxillary central incisors. A whip appliance, which included a removable orthodontic appliance, a cantilever spring (whip) and a bonded tube, was used to treat this rotation. After 4 weeks, the upper right central incisor was aligned and overcorrected completely. A circumferential supracrestalfibrotomy was performed to prevent relapse. Conclusion In the present case, we treated a severely rotated central incisor in a short duration of timeusing the whip appliance. This appliance can be utilized effectively in emergency situations such as traumatic occlusion of central incisors","PeriodicalId":21563,"journal":{"name":"Shahid Beheshti University Dental Journal","volume":"19 1","pages":"40-43"},"PeriodicalIF":0.0,"publicationDate":"2019-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77652636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Systematic Review of Methods Used to Assess Mid-Palatal Suture Maturation 评估中腭缝合线成熟度方法的系统综述

Shahid Beheshti University Dental Journal Pub Date : 2019-03-10 DOI: 10.22037/JDS.V37I1.27174

Arezoo Mahdian, Shekoofeh Shaykhian, Mohammad Behnaz

{"title":"A Systematic Review of Methods Used to Assess Mid-Palatal Suture Maturation","authors":"Arezoo Mahdian, Shekoofeh Shaykhian, Mohammad Behnaz","doi":"10.22037/JDS.V37I1.27174","DOIUrl":"https://doi.org/10.22037/JDS.V37I1.27174","url":null,"abstract":"Objectives Use of a reliable method to determine the degree of skeletal development of the mid-palatal suture is important in the choice of treatment between orthopedic maxillary expansion and surgical expansion in adolescents and young adults. The aim of this study was to review the new methods for evaluation of mid-palatal suture maturation.Methods Electronic search was conducted in PubMed and Scopus databases using the following key words: (“mid-palatal suture maturation” OR “mid-palatal suture ossification”) AND (“orthopedic treatment” OR “maxillary expansion” OR “orthodontic*”) to find studies published from 1990 to December 2018 in English that evaluated the mid-palatal suture maturation stage.Results Of 127 papers found, 28 articles met the inclusion criteria and their full texts were reviewed. Finally, 8 met the inclusion criteria. Five studies used cone-beam computed tomography (CBCT) as the imaging modality and examined the quality of the mid-palatal suture maturation and assessed the morphology of the suture. Two studies used bone density and one study used fractal dimensions.Conclusion Since all the innovative methods lack a gold standard and valid histological references, it is not possible to reach a comprehensive conclusion. It is therefore important that the clinicians use several diagnostic criteria for thorough evaluation of the development of mid-palatal suture and decide on the appropriate therapeutic modality","PeriodicalId":21563,"journal":{"name":"Shahid Beheshti University Dental Journal","volume":"27 1","pages":"26-31"},"PeriodicalIF":0.0,"publicationDate":"2019-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87286415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Oral Midazolam Vs Promethazine as Pre Sedation Medication in Pediatric Dentistry 口服咪达唑仑与异丙嗪作为小儿牙科的预镇静药物

Shahid Beheshti University Dental Journal Pub Date : 2018-06-10 DOI: 10.22037/JDS.V36I2.24547

G. Ansari, S. Razavi, L. Toomarian, A. Eghbali, S. Shayeghi

{"title":"Oral Midazolam Vs Promethazine as Pre Sedation Medication in Pediatric Dentistry","authors":"G. Ansari, S. Razavi, L. Toomarian, A. Eghbali, S. Shayeghi","doi":"10.22037/JDS.V36I2.24547","DOIUrl":"https://doi.org/10.22037/JDS.V36I2.24547","url":null,"abstract":"Objectives Pre- and post-sedation effect of oral Midazolam to promethazine in2-6 yrs old fearful children for dental treatment Methods This randomized clinical trial was carried out on a group of 26 children aged 2-6 years referred to the dental school due to their fear and multiple dental needs. Patients were selected from ASA I or II classification and scored 1 in Frankl Behavior scale. Each patient was scheduled for two subsequent visits to receive one of the two pre medications before IV sedation. Each patient served as self-control and randomly assigned to either group A: receiving Midazolam oral as premed in 1 st visit or group B: receiving Promethazine oral as the premed in 1 st visit. Six hour NPO was instructed prior to sedation visit. Monitoring vital signs were conducted at every 15 minutes starting with base line before any drug administration. Sedation score was recorded using Houpt Sedation scale. Post sedation problems were recorded by operator. Data were analyzed using Student t test and Kruskal Wallis. Results No significant difference was noted between the patient perceptions at the two different visits. Children did not show a significant difference on symptoms such as Crying, Movement, Sleep and overall behavior in two visits at the first 15 minutes of sedative injection. Post-operative complications were having no significant difference. Lower sickness and vomiting were reported following promethazine intake. Conclusion Promethazine seems to be as effective and as acceptable premedication as Midazolam in pediatric dentistry.","PeriodicalId":21563,"journal":{"name":"Shahid Beheshti University Dental Journal","volume":"68 1","pages":"47-50"},"PeriodicalIF":0.0,"publicationDate":"2018-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89895374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Stress distribution pattern in roots of incisors with various root resorptions: A finite element study 不同牙根吸收的门牙牙根应力分布模式:有限元研究

Shahid Beheshti University Dental Journal Pub Date : 2018-03-10 DOI: 10.22037/JDS.V36I1.24559

M. Oshagh

{"title":"Stress distribution pattern in roots of incisors with various root resorptions: A finite element study","authors":"M. Oshagh","doi":"10.22037/JDS.V36I1.24559","DOIUrl":"https://doi.org/10.22037/JDS.V36I1.24559","url":null,"abstract":"Objectives Root resorption is a dangerous side effect in orthodontics, and maxillary incisors are at the highest risk for root resorption. It is important to understand optimal force considerations for patients with altered root lengths.The purpose of this study was to investigate the effects of root length on stress distribution on roots by means of three-dimensional finite element method (FEM). Methods Three dimensional FEM models of maxillary central and lateral incisors were made. Then, root length of the incisors was changed in the increments of 1 mm from 0-4 mm. Applying 50 g (0.5 N) of force perpendicular to the tooth crown simulated uncontrolled tipping. Stresses and strains for each model were calculated and Pearson correlation coefficient was used to analysis the data. Results There were significant correlations between root length of incisors and maximum stress in PDL. In the centrals with various root lengths, maximum stress was between 0.010884 and 0.056520 MPa, and in the laterals, it was between 0.027297 and 0.221040 MPa. By reducing root length of incisors, the maximum stress in buccal apical (r= 0.933,p<0.001 and 0.995, p<0.001 prospectively) and lingual crestal areas (r= 0.974 p=0.005 and 0.992, p=0.001 respectively) were reduced. Conclusion Although in lateral incisors, stress at the lingual crestal area was more than buccal apical area, in central incisors with more than 2 mm resorption, the stress distribution of buccal apical was higher. Therefore, in maxillary central incisors with more root resorption, force control might be even more critical.","PeriodicalId":21563,"journal":{"name":"Shahid Beheshti University Dental Journal","volume":"143 1","pages":"12-17"},"PeriodicalIF":0.0,"publicationDate":"2018-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76426017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Role of Reinforcement Methods in Retention of Composite Restorations of Primary Anterior Teeth 加固方法在前牙复合修复体固位中的作用

Shahid Beheshti University Dental Journal Pub Date : 2017-12-10 DOI: 10.22037/JDS.V35I4.24588

G. Ansari, H. Torabzadeh, B. Malekafzali, R. Yarmohammadi

{"title":"Role of Reinforcement Methods in Retention of Composite Restorations of Primary Anterior Teeth","authors":"G. Ansari, H. Torabzadeh, B. Malekafzali, R. Yarmohammadi","doi":"10.22037/JDS.V35I4.24588","DOIUrl":"https://doi.org/10.22037/JDS.V35I4.24588","url":null,"abstract":"Objectives This study aimed to evaluate the retention of composite restorations of primary anterior teeth reinforced with composite posts, glass fiber posts, para-pulpal pins with composite posts, and para-pulpal pins alone.Methods Forty freshly extracted sound primary canine teeth with at least two-third of the root length remaining were selected. After disinfection, the tooth crown was cut perpendicular to the longitudinal axis. Root canals were prepared and filled using zinc oxide eugenol paste. The teeth were randomly allocated into four groups and restored using one of the following: Composite posts, glass fiber posts, para- pulpal pins with composite posts, and para-pulpal pins alone. Composite cores were constructed while a preformed U-shaped orthodontic wire was placed in the composite tip, samples were then placed in a universal testing machine for measurement of retention. The minimum force required to dislodge the restoration or cause fracture was considered as the retentive strength. The collected data were analyzed using one-way ANOVA and Tukey’s test (P 0.05).Conclusion para-Pulpal pin alone may not help in improving the retention of full crown restoration of primary anterior teeth. However, when used along with a composite post, it appears to improve the retention of restoration.","PeriodicalId":21563,"journal":{"name":"Shahid Beheshti University Dental Journal","volume":"25 1","pages":"118-121"},"PeriodicalIF":0.0,"publicationDate":"2017-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75067740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0