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Effect of polishing versus glazing of CAD-CAM ceramics on wear and surface roughness of opposing composite resin CAD-CAM 陶瓷的抛光与上釉对对位复合树脂的磨损和表面粗糙度的影响
Q2 Dentistry Pub Date : 2024-02-01 DOI: 10.4103/drj.drj_757_22
Mina Sadat Khoramian Esfahani, Ghazaleh Ahmadi, B. Esmaeili
Background: This study aimed to assess the effect of polishing versus glazing of computer-aided design-computer-aided manufacturing (CAD-CAM) ceramics on depth of wear and surface roughness of opposing composite resin. Materials and Methods: This in vitro study was conducted on 40 Z250 composite and 40 CAD-CAM ceramic specimens including Celtra Duo, Vita Mark II, e.max CAD, and Vita Suprinity ceramics. All ceramic specimens were roughened by a fine-grit bur after primary glazing to simulate an adjusted surface in the clinical setting. They were then randomly assigned to two subgroups and underwent reglazing or polishing. All composite and ceramic specimens underwent profilometry after surface treatment and prior to the wear test, and the results were recorded quantitatively. Composite specimens were then subjected to 120,000 wear cycles against ceramic specimens in a chewing simulator, and the depth of wear was measured by a scanner. Data were statistically analyzed by repeated measures two-way analysis of variance (ANOVA) and one-way ANOVA (α = 0.05). Results: Comparison of the surface roughness of composite specimens before and after the wear test revealed significant differences in both glazed Suprinity (P = 0.048) and Vita Mark II (P = 0.026) ceramics groups. The change in surface roughness after the wear test (compared with baseline) was significant in glazed (P = 0.000) and polished (P = 0.013) Vita Mark II and polished Suprinity (P = 0.037) ceramics, but this change was not significant in other ceramics (P > 0.05). The depth of wear after the wear test was not significantly different among the ceramic and composite subgroups (P > 0.05). Conclusion: Assessment of depth of wear and surface roughness of composite specimens showed that the polishing kits of CAD-CAM ceramics can serve as a suitable alternative to reglazing.
背景:本研究旨在评估计算机辅助设计-计算机辅助制造(CAD-CAM)陶瓷的抛光与上釉对对位复合树脂的磨损深度和表面粗糙度的影响。材料和方法:这项体外研究针对 40 个 Z250 复合材料和 40 个 CAD-CAM 陶瓷试样(包括 Celtra Duo、Vita Mark II、e.max CAD 和 Vita Suprinity 陶瓷)进行。所有陶瓷试样在初釉后都用细磨毛刺进行了粗化处理,以模拟临床环境中的调整表面。然后将它们随机分配到两个亚组,并进行重新上釉或抛光。所有复合材料和陶瓷试样在表面处理后和磨损测试前都进行了轮廓测量,并对结果进行了定量记录。然后在咀嚼模拟器中对复合材料试样和陶瓷试样进行 120,000 次磨损循环,并用扫描仪测量磨损深度。数据通过重复测量双向方差分析(ANOVA)和单向方差分析(α = 0.05)进行统计分析。结果比较磨损测试前后复合材料试样的表面粗糙度发现,釉面 Suprinity(P = 0.048)和 Vita Mark II(P = 0.026)陶瓷组都存在显著差异。磨损测试后表面粗糙度的变化(与基线相比)在上釉(P = 0.000)和抛光(P = 0.013)的 Vita Mark II 陶瓷和抛光的 Suprinity(P = 0.037)陶瓷中显著,但在其他陶瓷中变化不显著(P > 0.05)。磨损测试后的磨损深度在陶瓷和复合材料亚组中没有明显差异(P > 0.05)。结论对复合材料试样的磨损深度和表面粗糙度的评估表明,CAD-CAM 陶瓷的抛光套件可以作为重新上釉的合适替代品。
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引用次数: 0
Comparison of intelligent development (IQ & EQ) of children with cleft lip and palate 唇腭裂儿童智力发展(智商和情商)比较
Q2 Dentistry Pub Date : 2024-02-01 DOI: 10.4103/drj.drj_58_23
Rasool Esmaeili Maryan, M. Feizbakhsh, Zohreh Esmaeilian, Golnoosh Sedaghati
Background: Attention to the issue of intelligence and its promotion in children with cleft lip and cleft palate (CL and CP) is necessary to reduce their injuries in life. This study aimed to determine the intelligence quotient (IQ) and emotional intelligence (EQ) in children with CL and CP in comparison to healthy children. Materials and Methods: In this descriptive study, 140 children, including 70 children with CL and CP, were selected from the Children treated in Craniofacial and Cleft Research Center, Spearman correlation, ANOVA and 70 healthy children were selected from the Pediatric Dentistry Department of Isfahan University, in the age range of 5–9 years. After obtaining the consent of the children's parents, the Raven IQ questionnaire and the Mayer and Salovey EQ questionnaire were given to the children. Data were analyzed by the Pearson correlation coefficient tests (α =0.05). Results: EQ score in healthy children was significantly higher than in children with CL and CP (P < 0.001). The percentage of IQ cognitive intelligence in healthy children and children with CL and CP was not significantly different (P = 0.641). In healthy children, no significant relationship was observed between cognitive intelligence IQ and EQ (r = 0.018, P = 0.882). However, among children with CL and CP, there was a significant inverse relationship between cognitive intelligence IQ and EQ (P < 0.001, r = −0.526). Conclusion: CL and CP have no effect on IQ in children, but it does affect EQ.
背景:为了减少唇裂和腭裂儿童在生活中受到的伤害,有必要关注他们的智力问题并促进其发展。本研究旨在测定唇裂和腭裂儿童与健康儿童相比的智商(IQ)和情商(EQ)。材料和方法:在这项描述性研究中,从颅面和唇裂研究中心接受治疗的儿童中选取了 140 名儿童,其中包括 70 名 CL 和 CP 患儿,采用斯皮尔曼相关性分析和方差分析,并从伊斯法罕大学儿童牙科系选取了 70 名健康儿童,年龄范围为 5-9 岁。在征得儿童家长的同意后,对这些儿童进行了瑞文智商问卷调查和迈尔与萨洛维情商问卷调查。数据分析采用皮尔逊相关系数检验(α =0.05)。结果显示健康儿童的情商得分明显高于CL和CP儿童(P < 0.001)。健康儿童与 CL 和 CP 儿童的 IQ 认知智能百分比无显著差异(P = 0.641)。在健康儿童中,认知智能智商与情商之间没有发现明显的关系(r = 0.018,P = 0.882)。然而,在CL和CP儿童中,认知智能智商与情商之间存在明显的反向关系(P < 0.001,r = -0.526)。结论CL和CP对儿童的智商没有影响,但对情商有影响。
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引用次数: 0
Morphometric parameters of dental pulp in immature teeth in a sheep model after mechanical pulp exposure and restoration with reinforced zinc oxide-eugenol 绵羊模型中未成熟牙齿的牙髓形态计量参数,经过机械牙髓暴露和强化氧化锌-丁香酚修复后的形态计量参数
Q2 Dentistry Pub Date : 2024-02-01 DOI: 10.4103/drj.drj_682_22
Eshaghali Saberi, Z. Heidari, H. Mahmoudzadeh-Sagheb, Mahdieh Narouei, Lida Jafari, Alireza Mahmoudzadeh-Sagheb, Mahmoud Saadatian
Background: The aim of the study was to investigate the morphometric parameters of dental pulp in open apices immature teeth in a sheep model after mechanical pulp exposure and restoration with reinforced zinc oxide-eugenol. Materials and Methods: In this experimental study, a total of 12 immature mandibular central incisors from six adult male sheep, weighing 30–40 kg and with the age of 1 year old with Merino race were examined. After anesthesia, the pulps of the teeth in the case group were mechanically exposed and then were restored with reinforced zinc oxide-eugenol and amalgam. In the control group, the teeth remained intact. The animals were sacrificed at intervals of 2, 4, 6, and 8 weeks (E2, E4, E6, and E8) in the case and 2 and 8 weeks (C2 and C8) in the control groups. Then, their teeth were removed with the surrounding supporting tissues and alveolar bones. Tissue processing and staining were done, and the sections were examined under a light microscope. The Kruskal–Wallis and Mann–Whitney U tests were used to analyze the data and compare the changes between the two groups. P < 0.05 was considered statistically significant. Results: In response to mechanical exposure, reparative or tertiary dentin was formed, and its thickness increased during the time of the study. The thickness of the odontoblastic layer in the E4 group was the highest amount. The pulp chamber diameter in the C2 group was significantly larger than the other groups, and the diameter of the apical foramen in the E8 was decreased significantly compared to the controls (P < 0.05). Conclusion: In response to mechanical exposure and restoration with reinforced zinc oxide-eugenol, some morphometric parameters of the dental pulp changed significantly in the sheep model compared to the controls.
背景:本研究的目的是调查绵羊模型中开尖未成熟牙在经过机械牙髓暴露和强化氧化锌-丁香酚修复后的牙髓形态参数。材料和方法:在本实验研究中,共检查了 6 只成年雄性绵羊的 12 颗未成熟下颌中切牙,这些绵羊体重 30-40 千克,年龄为 1 岁,均为美利奴种。麻醉后,对病例组牙齿的牙髓进行机械暴露,然后用强化氧化锌-丁香酚和汞合金进行修复。对照组的牙齿保持完好。病例组的动物在每隔 2、4、6 和 8 周(E2、E4、E6 和 E8),对照组的动物在每隔 2 和 8 周(C2 和 C8)时被处死。然后,拔除他们的牙齿及其周围的支持组织和牙槽骨。进行组织处理和染色,并在光学显微镜下观察切片。采用 Kruskal-Wallis 和 Mann-Whitney U 检验分析数据,比较两组之间的变化。P<0.05为差异有统计学意义。结果在机械暴露的作用下,修复性牙本质或三级牙本质形成,其厚度在研究期间有所增加。E4 组的牙本质层厚度最大。与对照组相比,C2 组的牙髓腔直径明显大于其他组,E8 组的根尖孔直径明显缩小(P < 0.05)。结论与对照组相比,绵羊模型在机械暴露和强化氧化锌-丁香酚修复后,牙髓的一些形态参数发生了明显变化。
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引用次数: 0
Evaluation of surface energy and surface stability and adherence of Candida albicans to octa fluoro pentyl (meth) acrylate-coated PEEK using plasma spray. 利用等离子喷涂技术评估白色念珠菌在八氟戊基(甲基)丙烯酸酯涂层 PEEK 上的表面能、表面稳定性和附着性。
Q2 Dentistry Pub Date : 2024-01-25 eCollection Date: 2024-01-01
Majid Jahangir, Alireza Hadi, Zahra Yadegari, Razieh Shahbazi, Parisa Amdjadi

Background: Polyetheretherketone (PEEK) has favorable properties that make it able to be used as a denture base material, but it is also susceptible to the adhesion of microorganisms. In this study, we applied Octafluoropentyl (meth) acrylate (OFPA) coating on the PEEK polymer surface by using plasma spray and investigated the functional groups present on the surface, changes in the surface energy and Candida albicans adhesion.

Materials and methods: In this experimental study, the samples were placed in a control group without surface preparation and three experimental groups that were subjected to plasma spray for 10, 30, and 60 s and then impregnated with degassed Octa fluoropentyl (meth) acrylate (Sigma-Aldrich, USA) monomer. Fourier transform infrared spectroscopy (FTIR) was used to identify the functional groups and new chemical bonds between PEEK and OFPA, and Sessile Drop Method was used to evaluate the surface's wettability. The surface morphology was checked using a LEXT OLS4000 (Olympus®-Japan) microscope, and the inhibition of C. albicans adhesion was also checked by counting the colonies in terms of colony forming unit/mL (CFU/mL). Kurskal-Wallis analysis was conducted to assess Candida adhesion, while wettability was evaluated using analysis of variance and post hoc analyses. The level of statistical significance was set at P < 0.05.

Results: FTIR analysis confirmed that a chemical between OFPA and PEEK was established. The samples showed a significant increase in the contact angle after 30 s of plasma application (CA = 88.2 ± 7.3). The contact angle decreased again by increasing the surface modification to 60 s (CA = 64.33 ± 5.5). Examining the surface morphology of the samples shows an increase in surface roughness with increasing plasma time up to 60 s. The number of adherent colonies was the lowest in 30 s group, but it was not statistically significant (P = 0.658).

Conclusion: No statistically significant difference in C. albicans CFU/mL count was found between groups. The contact angle of the 30 s group was significantly higher than the control group.

背景:聚醚醚酮(PEEK)具有良好的特性,可用作义齿基托材料,但也容易受到微生物的附着。在这项研究中,我们利用等离子喷涂技术在 PEEK 聚合物表面涂上了八氟戊基(甲基)丙烯酸酯(OFPA)涂层,并研究了其表面存在的官能团、表面能的变化以及白色念珠菌的附着情况:在本实验研究中,样品分为未进行表面处理的对照组和三个实验组,分别进行 10 秒、30 秒和 60 秒的等离子喷涂,然后浸渍脱气的辛基(甲基)丙烯酸氟戊酯(Sigma-Aldrich,美国)单体。傅立叶变换红外光谱法(FTIR)用于识别 PEEK 和 OFPA 之间的官能团和新化学键,无水滴落法用于评估表面的润湿性。使用 LEXT OLS4000(Olympus®-Japan)显微镜检查了表面形态,并通过以菌落形成单位/毫升(CFU/mL)为单位的菌落计数检查了对白僵菌粘附的抑制作用。Kurskal-Wallis 分析用于评估念珠菌的粘附性,而润湿性则通过方差分析和事后分析进行评估。统计显著性水平设定为 P < 0.05:傅立叶变换红外光谱分析证实,OFPA 和 PEEK 之间已形成化学反应。使用等离子体 30 秒后,样品的接触角明显增加(CA = 88.2 ± 7.3)。将表面改性时间延长至 60 秒后,接触角再次下降(CA = 64.33 ± 5.5)。对样品表面形态的研究表明,随着等离子时间的延长,表面粗糙度增加,最高可达 60 秒。附着菌落数在 30 秒组最低,但无统计学意义(P = 0.658):结论:各组之间的白僵菌 CFU/mL 数量差异无统计学意义。30 秒组的接触角明显高于对照组。
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引用次数: 0
Comparison of the accuracy of apex locator, digital radiography, and cone-beam computed tomography in root canal working length determination in teeth with external root resorption: An in vitro study. 比较根尖定位仪、数字射线照相术和锥形束计算机断层扫描在确定外根吸收牙根管工作长度方面的准确性:体外研究。
Q2 Dentistry Pub Date : 2024-01-25 eCollection Date: 2024-01-01
Seyed Mohsen Hasheminia, Sanaz Jahadi, Farida Ghazanfari Moghaddam, Shervin Bagherieh

Background: The aim of this study was to compare the accuracy of apex locator, digital periapical radiography, and cone-beam computed tomography (CBCT) for determining the root canal working length (WL) in teeth with external root resorption (ERR).

Materials and methods: In this in vitro study, the sample consisted of 54 extracted permanent single-rooted human teeth. ERRs were performed at the 3 mm apical root using 65% of nitric acid for 24 h. After determining the actual WL by K-file #10 (gold standard) with the visualization method, the teeth were mounted in alginate and the WL of each tooth was determined using the electronic apex locator (EAL) equipped with a K-file #15. The teeth were mounted with wax in the teeth sockets of a dry human mandible, and the images were obtained by digital phosphor plate receptors and CBCT scans. The mean registered WL of each method was statistically compared with the gold standard WL using one-way ANOVA with P < 0.001.

Results: The mean ± standard deviation (SD) of actual WL was 16.00 ± 2.24. The mean ± SD of WLs determined by CBCT, EAL, and digital radiography were 15.38 ± 2.19, 15.52 ± 2.32, and 16.83 ± 2.20, respectively. This study showed that the mean measured WL with ERR in all methods was significantly different from the actual WL (P < 0.001).

Conclusion: This study showed that there was a significant difference between the actual mean WL and the EAL, digital periapical radiography, and CBCT mean WL. Thus, the combination of EAL and CBCT could be a reliable method for determining WL in the presence of ERR.

研究背景本研究的目的是比较根尖定位仪、数字根尖周X射线照相术和锥形束计算机断层扫描(CBCT)确定外根吸收(ERR)牙齿根管工作长度(WL)的准确性:在这项体外研究中,样本包括 54 颗拔出的单根人类恒牙。用 10 号 K 型锉(金标准)和可视化方法确定实际 WL 后,将牙齿安装在藻酸盐中,用配备 15 号 K 型锉的电子根尖定位器(EAL)确定每颗牙齿的 WL。用蜡将牙齿安装在干燥人类下颌骨的牙槽中,通过数字荧光板感受器和 CBCT 扫描获得图像。采用单因素方差分析对每种方法的平均登记 WL 与金标准 WL 进行统计比较,P < 0.001:实际 WL 的平均值(± 标准差)为 16.00 ± 2.24。通过 CBCT、EAL 和数字放射摄影测定的 WL 平均值(± 标准差)分别为 15.38 ± 2.19、15.52 ± 2.32 和 16.83 ± 2.20。本研究表明,所有方法中使用ERR测量的平均WL与实际WL有显著差异(P < 0.001):本研究表明,实际平均WL与ERAL、数字根尖周X光片和CBCT平均WL之间存在显著差异。因此,结合 EAL 和 CBCT 是确定ERR 存在时 WL 的可靠方法。
{"title":"Comparison of the accuracy of apex locator, digital radiography, and cone-beam computed tomography in root canal working length determination in teeth with external root resorption: An <i>in vitro</i> study.","authors":"Seyed Mohsen Hasheminia, Sanaz Jahadi, Farida Ghazanfari Moghaddam, Shervin Bagherieh","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Background: </strong>The aim of this study was to compare the accuracy of apex locator, digital periapical radiography, and cone-beam computed tomography (CBCT) for determining the root canal working length (WL) in teeth with external root resorption (ERR).</p><p><strong>Materials and methods: </strong>In this <i>in vitro</i> study, the sample consisted of 54 extracted permanent single-rooted human teeth. ERRs were performed at the 3 mm apical root using 65% of nitric acid for 24 h. After determining the actual WL by K-file #10 (gold standard) with the visualization method, the teeth were mounted in alginate and the WL of each tooth was determined using the electronic apex locator (EAL) equipped with a K-file #15. The teeth were mounted with wax in the teeth sockets of a dry human mandible, and the images were obtained by digital phosphor plate receptors and CBCT scans. The mean registered WL of each method was statistically compared with the gold standard WL using one-way ANOVA with <i>P</i> < 0.001.</p><p><strong>Results: </strong>The mean ± standard deviation (SD) of actual WL was 16.00 ± 2.24. The mean ± SD of WLs determined by CBCT, EAL, and digital radiography were 15.38 ± 2.19, 15.52 ± 2.32, and 16.83 ± 2.20, respectively. This study showed that the mean measured WL with ERR in all methods was significantly different from the actual WL (<i>P</i> < 0.001).</p><p><strong>Conclusion: </strong>This study showed that there was a significant difference between the actual mean WL and the EAL, digital periapical radiography, and CBCT mean WL. Thus, the combination of EAL and CBCT could be a reliable method for determining WL in the presence of ERR.</p>","PeriodicalId":11016,"journal":{"name":"Dental Research Journal","volume":"21 ","pages":"8"},"PeriodicalIF":0.0,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10899164/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139995837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Efficacy of the combination of myofunctional therapy (lip exercises) and activator high-pull headgear in the closure of interlabial gap in long-face skeletal class II patients with lip incompetence: A 6-8-month longitudinal randomized clinical trial. 肌肉功能疗法(唇部运动)与激活器高拉力头套相结合对长脸骨骼II级唇部功能不全患者唇间缝隙闭合的疗效:为期 6-8 个月的纵向随机临床试验。
Q2 Dentistry Pub Date : 2024-01-25 eCollection Date: 2024-01-01
Atyie Safar Alizade, Elmira Asadi, Alireza Jafari-Naeimi, Salmeh Kalbassi

Background: Lip incompetence is an important issue in orthodontics. No study has evaluated the effects of the combination of headgear + lip exercises on lip incompetence. Therefore, this study was conducted.

Materials and methods: This was a longitudinal randomized clinical trial on 29 subjects (16 controls and 13 experimental subjects). Both groups were treated with standardized activator high-pull headgear (and followed up monthly) for 6-8 months. In the experimental group, patients were also instructed to practice certain lip exercises 3 sessions a day, 5 times per session. Pre-/post-treatment interlabial gap, upper lip length and vermilion height, lower lip length and vermilion height, nasolabial angle, and profile convexity angle were measured clinically and photographically, immediately before treatment and after it. Data were analyzed using paired/unpaired t-tests (α = 0.025) and partial correlation coefficient controlling for the intervention type (α = 0.05).

Results: Lip exercise plus activator headgear significantly changed/improved all parameters (P ≤ 0.006) over the 6-8-month course of treatment. Activator headgear alone changed/improved only 4 parameters: interlabial gap, upper and lower lip lengths, the lower lip vermilion height, and profile convexity (P ≤ 0.008). Compared to the control (activator headgear alone), in the experimental group, the changes observed in the interlabial gap closure (P = 0.011), upper lip lengthening (P = 0.002), and upper lip vermilion lengthening (P = 0.017) were significantly greater. Convexity angle corrections were more successful in cooperative patients (R = 0.469, P = 0.012). Cases with smaller pretreatment nasolabial angles may experience more changes in this angle after treatment (R = 0.581, P = 0.001).

Conclusion: The addition of lip exercises to activator high-pull headgear can boost activator headgear's efficacy in treating lip incompetence.

背景:唇不齐是口腔正畸中的一个重要问题。目前还没有研究评估过头套+唇部锻炼的组合对唇部闭合不全的影响。因此,我们开展了这项研究:这是一项纵向随机临床试验,共有 29 名受试者(16 名对照组和 13 名实验组)参加。两组患者均接受了为期 6-8 个月的标准化激活剂高拉头套治疗(每月随访一次)。在实验组中,还指导患者每天进行 3 次嘴唇练习,每次 5 次。在治疗前和治疗后,对唇间间隙、上唇长度和朱砂高度、下唇长度和朱砂高度、鼻唇角和轮廓凸角进行临床测量和拍照。数据采用配对/非配对 t 检验(α = 0.025)和控制干预类型的偏相关系数(α = 0.05)进行分析:结果:在为期6-8个月的疗程中,唇部运动加活化剂头套显著改变/改善了所有参数(P≤0.006)。单独使用激活头套仅改变/改善了 4 项参数:唇间隙、上下唇长度、下唇朱砂高度和轮廓凸度(P ≤ 0.008)。与对照组(仅使用激活头套)相比,实验组在唇间隙闭合(P = 0.011)、上唇延长(P = 0.002)和上唇朱砂延长(P = 0.017)方面观察到的变化明显更大。合作患者的凸度角矫正成功率更高(R = 0.469,P = 0.012)。治疗前鼻唇角较小的病例在治疗后鼻唇角的变化可能更大(R = 0.581,P = 0.001):结论:在激活器高拉力头套中加入唇部锻炼可提高激活器头套治疗唇部闭合不全的疗效。
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引用次数: 0
Prevalence of middle mesial root canal in mandibular molars in an Iranian population: A micro-computed tomography study. 伊朗人口中下颌臼齿中中根管的患病率:一项微型计算机断层扫描研究。
Q2 Dentistry Pub Date : 2024-01-25 eCollection Date: 2024-01-01
Alireza Farhad, Mohsen Hasheminia, Ehsan Hekmatian, Vahid Mojiri

Background: Knowledge about the anatomic variations of the root canal system and their prevalence is necessary for clinicians to ideally clean the root canal system. The anatomic complexity of the root canal system is one of the reasons for its inadequate debridement, resulting in residual microorganisms and root canal treatment failure. The present study aimed to evaluate the prevalence of middle mesial root canals in mandibular molars in an Iranian population.

Materials and methods: The samples in the present descriptive/cross-sectional study consisted of mandibular first and second molars (n = 100, with 50 first and 50 s molars). A convenient sampling method was used to collect samples. The teeth were mounted in gypsum and scanned using a micro-computed tomography unit. The images were reconstructed with software, and the relevant checklist was completed by the observers. The data were analyzed with SPSS v26 using the Chi-squared test at a significance level of P < 0.05.

Results: The prevalence of the middle mesial root canal in the present study was 36% for mandibular first molars and 22% for mandibular second molars, with an overall prevalence of 29%. The prevalence of the middle mesial root canal was not significantly different between the first and second mandibular molars (P = 0.12). The mean distance between the mesiobuccal and mesiolingual root canal orifices in the teeth with a middle mesial root canal was significantly higher than in those without the middle mesial root canal (P < 0.001). In addition, there was no significant difference in the prevalence of the middle mesial root canal between the teeth with and without the second distal root canal (P = 0.89).

Conclusion: The prevalence of the middle mesial root canal in the studied population was 29%, which is significant clinically. In addition, the mean distance between the mesiobuccal and mesiolingual root canal orifices in teeth with a middle mesial root canal was higher than that in teeth without this root canal.

背景:了解根管系统的解剖变异及其流行情况对于临床医生理想地清洁根管系统非常必要。根管系统解剖学上的复杂性是导致清创不彻底,造成微生物残留和根管治疗失败的原因之一。本研究旨在评估伊朗人群中下颌磨牙中中根管的患病率:本描述性/横断面研究的样本包括下颌第一和第二磨牙(n = 100,其中第一和第二磨牙各为 50)。样本采集采用了方便的抽样方法。将牙齿装在石膏中,使用微型计算机断层扫描装置进行扫描。使用软件对图像进行重建,并由观察者填写相关核对表。数据使用 SPSS v26 进行分析,采用卡方检验,显著性水平为 P <0.05:在本研究中,下颌第一磨牙中中间根管的患病率为 36%,下颌第二磨牙中中间根管的患病率为 22%,总患病率为 29%。下颌第一磨牙和下颌第二磨牙的中间根管患病率无明显差异(P = 0.12)。有中间中牙根管的牙齿中颊根管口和中叶根管口之间的平均距离明显高于没有中间中牙根管的牙齿(P < 0.001)。此外,有第二远端根管的牙齿和没有第二远端根管的牙齿在中中根管的患病率上没有明显差异(P = 0.89):结论:研究人群中中间根管的患病率为 29%,这在临床上具有重要意义。结论:在研究人群中,中中根管的发病率为 29%,这在临床上具有重要意义。此外,有中中根管的牙齿的颊中根管口和舌中根管口之间的平均距离高于没有中中根管的牙齿。
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引用次数: 0
Effect of photobiomodulation on postoperative endodontic pain: A systematic review of clinical trials. 光生物调节对牙髓术后疼痛的影响:临床试验系统回顾
Q2 Dentistry Pub Date : 2024-01-25 eCollection Date: 2024-01-01
Seyyed Amir Seyyedi, Maryam Baghizadeh Fini, Reza Fekrazad, Selda Abbasian, Amir Ardalan Abdollahi

Background: This review aims to perform a complete evaluation of the impact of photobiomodulation (PMB) on postoperative endodontic pain.

Materials and methods: The PRISMA checklist was used to perform this systematic review. The electronic databases were searched, including Google Scholar, PubMed, and Embase. Sixty-three papers were obtained through a main electronic search and a hand search. Nine trials met the criteria after screening the titles, abstracts, and/or full texts.

Results: Seven out of nine studies showed that PMB has a significant impact on relieving postoperative endodontic pain, with no statistically significant difference in the severity of pain between the laser and control groups in the two remaining studies. In addition, eight studies showed no adverse effects, indicating that we can remove the adverse effects of drugs such as nonsteroidal anti-inflammatory drugs. However, one study showed evidence of the consequences of PMB application on teeth with symptomatic irreversible pulpitis. Therefore, it can be concluded that PMB should not be used in teeth with pain because of irreversible pulpitis.

Conclusion: Although there is some understanding from a cellular viewpoint of the effects of PMB, there is still some uncertainty about whether these cell-level modifications impact reducing the postendodontic pain.

背景:本综述旨在全面评估光生物调制(PMB)对牙髓术后疼痛的影响:本系统性综述采用了 PRISMA 清单。材料:本系统性综述采用了 PRISMA 检查表,检索了 Google Scholar、PubMed 和 Embase 等电子数据库。通过主要电子检索和人工检索,共获得 63 篇论文。经过对标题、摘要和/或全文的筛选,有九项试验符合标准:结果:9 项研究中有 7 项显示,PMB 对缓解牙髓术后疼痛有显著效果,其余两项研究中激光组和对照组的疼痛严重程度差异无统计学意义。此外,有八项研究显示没有不良反应,这表明我们可以消除非甾体抗炎药等药物的不良反应。不过,有一项研究表明,对有症状的不可逆牙髓炎牙齿应用 PMB 会产生后果。因此,可以得出结论,PMB 不适用于因不可逆性牙髓炎而疼痛的牙齿:尽管从细胞的角度对 PMB 的作用有了一定的了解,但对于这些细胞水平的改变是否会对减轻牙髓术后疼痛产生影响仍存在一定的不确定性。
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引用次数: 0
Clear aligner therapy versus conventional brackets: Oral impacts over time. 透明矫治器疗法与传统托槽:随着时间的推移对口腔的影响
Q2 Dentistry Pub Date : 2024-01-25 eCollection Date: 2024-01-01
Sara Hashemi, Seyed Saman Hashemi, Kioumars Tavakoli Tafti, Seyed Sobhan Khademi, Niyosha Ariana, Shohreh Ghasemi, Mahmood Dashti, Hamed Ghanati, Marjan Mansourian

Background: The objective is to compare the impact of clear aligner treatment (CAT) versus conventional fixed appliance treatment (FAT) on oral health-related quality of life (OHRQoL) among adults at five-time points: pretreatment (T0), 1 week (T1), 1 month after (T2), and 6 months after (T3) treatment initiation, and in the long-term follow-up (T4).

Materials and methods: Search terms were based on Medical Subject Headings (MeSH) and non-MeSH. Potentially eligible studies compared OHRQoL in clear aligner (CA) and fixed appliance (FA) patients. In February 2023, Scopus, Web of Science, Cochrane, and PubMed were searched for published studies. Nine out of 94 shortlisted papers were eligible for a systematic review. Of these nine papers, five studies were considered for a meta-analysis.

Results: At T0, CA and FA patients had similar oral health impact profile (OHIP)-14 questionnaire scores with a standard mean difference (SMD) of 0.105 (confidence interval [CI]: -1.029-1.48). The SMD of the OHRQoL related to T1, T2, and T3 was -3.119 (CI: -0.145, 0.355), -1.527 (CI: -5.597, -0.64), and - 2.331 (CI: -1.906, -1.148). T4 showed no difference between groups (SMD = 0.007, CI: CI: -4.286, -0.376). Regarding the OHIP-14 domains, functional limitations remained consistent in both groups across all time intervals. Psychological discomfort exhibited a notable difference only at T2. Throughout the treatment, CAT showed significantly lower levels of physical, psychological, and social disability, as well as handicap, though these differences did not persist beyond T4. Notably, physical pain was the sole domain that remained elevated in the FAT group up to T4.

Conclusion: During the 1st day of the orthodontic treatment, both the CA and FA groups had comparable OHRQoL statuses. However, as time passed, the CA group notably improved their OHRQoL compared to the FA group. Interestingly, after a year or the completion of treatment, both groups eventually reached similar OHRQoL levels. Nevertheless, it is worth noting that FA patients continued to experience more physical pain even a year later.

研究背景目的是比较透明矫治器治疗(CAT)与传统固定矫治器治疗(FAT)在五个时间点对成人口腔健康相关生活质量(OHRQoL)的影响:治疗前(T0)、治疗后1周(T1)、治疗后1个月(T2)、治疗后6个月(T3)以及长期随访(T4):搜索词基于医学主题词表(MeSH)和非 MeSH。符合条件的潜在研究对透明矫治器(CA)和固定矫治器(FA)患者的 OHRQoL 进行了比较。2023 年 2 月,Scopus、Web of Science、Cochrane 和 PubMed 对已发表的研究进行了检索。在 94 篇入围论文中,有 9 篇符合系统综述的条件。在这9篇论文中,有5项研究被考虑进行荟萃分析:在T0时,CA和FA患者的口腔健康影响档案(OHIP)-14问卷得分相似,标准平均差(SMD)为0.105(置信区间[CI]:-1.029-1.48)。与 T1、T2 和 T3 有关的 OHRQoL 的 SMD 分别为-3.119(置信区间[CI]:-0.145,0.355)、-1.527(置信区间[CI]:-5.597,-0.64)和-2.331(置信区间[CI]:-1.906,-1.148)。T4 组间无差异(SMD = 0.007,CI:CI:-4.286,-0.376)。在 OHIP-14 领域中,两组的功能限制在所有时间间隔内均保持一致。心理不适仅在第二阶段表现出明显差异。在整个治疗过程中,CAT 的身体、心理和社会残疾以及残障水平都明显降低,但这些差异在 T4 之后并没有持续。值得注意的是,身体疼痛是 FAT 组唯一一个直到 T4 仍保持升高的领域:结论:在正畸治疗的第一天,CA 组和 FA 组的 OHRQoL 状况相当。然而,随着时间的推移,与 FA 组相比,CA 组的 OHRQoL 显著改善。有趣的是,一年后或治疗结束后,两组患者的 OHRQoL 最终都达到了相似的水平。尽管如此,值得注意的是,即使在一年后,FA 患者仍然承受着更多的身体疼痛。
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引用次数: 0
Zirconia-ceramic versus metal-ceramic implant-supported multiunit fixed dental prostheses: A systematic review and meta-analysis. 氧化锆陶瓷与金属陶瓷种植体支持的多单位固定义齿:系统回顾与荟萃分析。
Q2 Dentistry Pub Date : 2024-01-25 eCollection Date: 2024-01-01
Naghma Tabarak, Gunjan Srivastava, Subrat Kumar Padhiary, Jimmy Manisha, Gopal Krishna Choudhury

Implant-supported prostheses could serve as a reliable restorative option for partial edentulism. Various restorative materials have been utilized in fabricating these prostheses, impacting both esthetics and peri-implant health. The present systematic review aimed to assess the survival rate and mechanical complications of zirconia ceramic compared to metal-ceramic implant-supported multiunit fixed dental prostheses (FDPs). We conducted searches in online databases such as MEDLINE (PubMed), Scopus, and Cochrane up until December 2022. A risk-of-bias assessment was done for all the included studies. Data extraction was performed based on the following parameters: author, year, study design, number of implants, abutment material, age range, observation period, incidence of mechanical complications, and survival rate. This systematic review included six studies (four randomized controlled trials and two retrospective studies). The meta-analysis significantly favored metal-ceramic restorations regarding mechanical complications with a risk ratio (RR) value of 1.64 and P = 0.001. Meta-analysis showed no difference in metal-ceramic FDPs in prostheses survival rate (P = 0.63; RR: 1.27, 95% confidence interval: 0.52-3.37; heterogeneity: P = 0.65; I2: 0%). While metal-ceramic multiunit implant-supported prostheses exhibited fewer mechanical complications compared to zirconia-ceramic prostheses, there was no significant difference in terms of prosthesis survival rate between the two. Hence, both treatments appear to be viable options for long-term implant-supported prostheses.

种植体支持的修复体可以作为部分缺牙的可靠修复选择。在制作这些修复体时使用了各种修复材料,对美观和种植体周围健康都有影响。本系统综述旨在评估氧化锆陶瓷与金属陶瓷种植体支持的多单位固定义齿(FDP)相比的存活率和机械并发症。我们在 MEDLINE (PubMed)、Scopus 和 Cochrane 等在线数据库中进行了搜索,搜索结果截止到 2022 年 12 月。我们对所有纳入的研究进行了偏倚风险评估。数据提取基于以下参数:作者、年份、研究设计、种植体数量、基台材料、年龄范围、观察期、机械并发症发生率和存活率。该系统综述包括六项研究(四项随机对照试验和两项回顾性研究)。荟萃分析结果表明,金属陶瓷修复体在机械并发症方面明显优于金属陶瓷修复体,风险比 (RR) 值为 1.64,P = 0.001。荟萃分析表明,金属陶瓷 FDP 在修复体存活率方面没有差异(P = 0.63;RR:1.27,95% 置信区间:0.52-3.37;异质性:P = 0.65;I2:0%)。与氧化锆陶瓷修复体相比,金属陶瓷多单位种植体支持修复体的机械并发症较少,但两者在修复体存活率方面没有显著差异。因此,这两种治疗方法似乎都是长期种植体支持修复体的可行选择。
{"title":"Zirconia-ceramic versus metal-ceramic implant-supported multiunit fixed dental prostheses: A systematic review and meta-analysis.","authors":"Naghma Tabarak, Gunjan Srivastava, Subrat Kumar Padhiary, Jimmy Manisha, Gopal Krishna Choudhury","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Implant-supported prostheses could serve as a reliable restorative option for partial edentulism. Various restorative materials have been utilized in fabricating these prostheses, impacting both esthetics and peri-implant health. The present systematic review aimed to assess the survival rate and mechanical complications of zirconia ceramic compared to metal-ceramic implant-supported multiunit fixed dental prostheses (FDPs). We conducted searches in online databases such as MEDLINE (PubMed), Scopus, and Cochrane up until December 2022. A risk-of-bias assessment was done for all the included studies. Data extraction was performed based on the following parameters: author, year, study design, number of implants, abutment material, age range, observation period, incidence of mechanical complications, and survival rate. This systematic review included six studies (four randomized controlled trials and two retrospective studies). The meta-analysis significantly favored metal-ceramic restorations regarding mechanical complications with a risk ratio (RR) value of 1.64 and <i>P</i> = 0.001. Meta-analysis showed no difference in metal-ceramic FDPs in prostheses survival rate (<i>P</i> = 0.63; RR: 1.27, 95% confidence interval: 0.52-3.37; heterogeneity: <i>P</i> = 0.65; <i>I</i><sup>2:</sup> 0%). While metal-ceramic multiunit implant-supported prostheses exhibited fewer mechanical complications compared to zirconia-ceramic prostheses, there was no significant difference in terms of prosthesis survival rate between the two. Hence, both treatments appear to be viable options for long-term implant-supported prostheses.</p>","PeriodicalId":11016,"journal":{"name":"Dental Research Journal","volume":"21 ","pages":"5"},"PeriodicalIF":0.0,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10899163/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139995889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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Dental Research Journal
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