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Impact of two energetic drinks on color stability, surface roughness and microhardness of some ceramic and hybrid materials 两种含能饮料对陶瓷和杂化材料颜色稳定性、表面粗糙度和显微硬度的影响
Pub Date : 2022-01-01 DOI: 10.4103/tdj.tdj_25_21
Nada El-Zayat, S. El-Safty, A. Korsel, Mahmoud E.-S. Shakal
Objective To evaluate the impact of two energetic drinks on color stability (CS), surface roughness (SR) and microhardness (HV) of some ceramic and hybrid materials. Materials and methods A total of 72 square-shaped samples (0.8 mm in thickness, 10 mm in width and 12 mm in length) were divided into three groups (n = 24) according to the studied materials: Celtra Duo, IPS e.max CAD/CAM and Nacera Hybrid. Each group was subdivided into three subgroups (n = 8) according to the three immersion solutions applied: artificial saliva, Hype and Power horse energetic drinks. Samples were sectioned using an Isomet 4000 (Buehler, Lake Bluff, USA) and then stored in artificial saliva for 24 h before doing the baseline color, surface roughness and microhardness measurements. For determination of color change (ΔE), a reflective spectrophotometer was used. Surface roughness (SR) testing was carried out using an optical profilometer with a built-in camera and the microhardness (HV) investigation was performed with a Microhardness Digital Tester. After 60 days of immersion in energetic drinks, these measurements for color stability, surface roughness and microhardness were repeated in the same way. Data were tabulated and analyzed using a two-way ANOVA followed by one-way ANOVA and Tukey's post-hoc test with a significance level assigned at P ≤ 0.05 for all tests. Results Statistical analysis revealed significant differences between studied groups for CS (P = 0.031), SR (P = 0.012) and HV (P = 0.028). Celtra Duo recorded the lowest color change (0.57 ± 0.09) and surface roughness (0.2499 ± 0.0033) and greatest microhardness (659.62 ± 6.10) with all immersion solutions. Nacera Hybrid material showed poorer values in all investigated properties compared to Celtra Duo and IPS e.max ceramics. For all studied materials, the greatest effect of immersion solutions on CS, SR and HV was exhibited by Power horse followed by Hype and artificial saliva. Conclusions The energetic drinks studied significantly increased SR and decreased CS and VH of Nacera Hybrid. Celtra Duo and IPS e.max CAD/CAM ceramics showed greater resistance to acidic energetic drinks compared Nacera Hybrid material. Clinical significance It is essential for the dentist to reinforce the awareness of patients regarding the risks of heavy consumption of energetic drinks. Nacera Hybrid material is a promising material but should not be used in esthetic restorations.
目的评价两种能量饮料对陶瓷和杂化材料颜色稳定性(CS)、表面粗糙度(SR)和显微硬度(HV)的影响。材料与方法将72个厚度为0.8 mm、宽度为10 mm、长度为12 mm的方形样品按研究材料分为3组(n = 24): Celtra Duo、IPS e.max CAD/CAM和Nacera Hybrid。每组按使用的三种浸泡溶液:人工唾液、Hype和Power horse功能饮料再分为三个亚组(n = 8)。使用Isomet 4000 (Buehler, Lake Bluff, USA)对样品进行切片,然后在人工唾液中保存24小时,然后进行基线颜色,表面粗糙度和显微硬度测量。用反射分光光度计测定颜色变化(ΔE)。使用内置摄像头的光学轮廓仪进行表面粗糙度(SR)测试,使用显微硬度数字测试仪进行显微硬度(HV)测试。在高能饮料中浸泡60天后,以同样的方式重复这些颜色稳定性、表面粗糙度和显微硬度的测量。将数据制表并进行分析,采用双向方差分析,然后采用单向方差分析和Tukey事后检验,所有检验的显著性水平均为P≤0.05。结果两组间CS (P = 0.031)、SR (P = 0.012)、HV (P = 0.028)差异有统计学意义。在所有浸泡溶液中,Celtra Duo的颜色变化最小(0.57±0.09),表面粗糙度最小(0.2499±0.0033),显微硬度最大(659.62±6.10)。与Celtra Duo和IPS e.max陶瓷相比,Nacera杂化材料在所有被调查的性能中显示出较差的值。在所有被研究的材料中,浸泡溶液对CS、SR和HV的影响最大的是Power horse,其次是Hype和人工唾液。结论高能饮料能显著提高Nacera杂交犬的SR,降低CS和VH。与Nacera Hybrid材料相比,Celtra Duo和IPS e.max CAD/CAM陶瓷对酸性高能饮料的耐受性更强。临床意义牙医必须加强病人对大量饮用能量饮料的风险的认识。Nacera复合材料是一种很有前途的材料,但不宜用于美学修复。
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引用次数: 0
Distraction osteogenesis in treatment of unilateral alveolar cleft 牵张成骨治疗单侧牙槽裂
Pub Date : 2022-01-01 DOI: 10.4103/tdj.tdj_20_21
I. Nowair, Marwa Ibrahim, Ahmed Elshreif
Objective This study was planned to compare the distraction of the lesser segment versus the greater segment via usage of (Liou cleft distractor) in repair of unilateral alveolar cleft. Patients & Methods 16 patients with unilateral alveolar clefts were included in this study. They were divided into two equal groups according to the osteotomized segment, Group I: in which the lesser bone segment was osteotomized for alveolar cleft repair. Group II: in which the greater segment was osteotomized for alveolar cleft repair. Results Stage I distraction: after three months, showed significant difference in the width of the cleft side in both groups as P-value was 0.007 in group I and P-value was 0.001 in group II. No significant differences in the vitality and mobility of teeth in both groups. The amount of relapse in the regenerate area at the different observation periods 3 and 6 months between both groups were statistically significant (P-value 0.018). Radiographic finding showed no significant difference of the inclination changes of the transported segment in group I (P-value 0.816), while in group II showed significant difference (P-value 0.001). Stage II alveolar cleft grafting: graft resorption and recurrence of fistula was recorded in one case of group II. The differences of the density of the grafted bone between the first month and six months in each group postoperatively were statistically significant in both groups as P-value 0.001 and 0.001 in group I and Group II respectively. Conclusion Both the lesser and the greater segments are suitable for treatment of alveolar cleft with some drawbacks related to the palatal inclination of transported segment in group II as compared to group I.
目的比较Liou腭裂牵张器在单侧牙槽裂修复中的小段牵张与大段牵张效果。患者与方法选取16例单侧牙槽裂患者作为研究对象。按截骨节段分为两组,第一组:截骨小节段修复牙槽裂。第二组:大节段截骨修复牙槽裂。结果ⅰ期牵张术:术后3个月,两组腭裂宽度差异有统计学意义,ⅰ组p值为0.007,ⅱ组p值为0.001。两组在牙齿活力和活动性方面无明显差异。两组患者在观察3、6个月时再生区复发量比较,差异均有统计学意义(p值为0.018)。x线检查显示,ⅰ组转运段倾斜度变化无显著性差异(p值0.816),ⅱ组有显著性差异(p值0.001)。II期牙槽裂移植:II组1例记录植骨吸收和瘘复发。两组术后第1个月和第6个月植骨密度差异均有统计学意义,p值分别为0.001和0.001。结论小节段和大节段均适用于牙槽裂的治疗,但与ⅰ组相比,ⅱ组在运输节段腭倾斜方面存在一定的缺陷。
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引用次数: 0
Immediately loaded implant retained mandibular overdenture in controlled diabetic patients: results of 5 years prospective clinical study 即刻负荷种植保留下颌覆盖义齿在控制糖尿病患者中的应用:5年前瞻性临床研究结果
Pub Date : 2021-10-01 DOI: 10.4103/tdj.tdj_18_21
Hesham S. Borg, TamerM.N. Mostafa, Ahmed Mohamed Alam-Eldein
Objectives This cohort study was carried out to evaluate dental implants retained overdenture in controlled type II diabetic patients after 5 years of immediate loading. Patients and methods Thirty completely edentulous patients (18 men and 12 women) with a mean age of 62 years old were included in this study. For each patient, two immediately loaded implants were inserted at the interforaminal region with ball and socket attachments to retained mandibular overdenture. Patients were evaluated clinically and radiographically at baseline (overdenture insertion) and after 6 months, 1, 3, and 5 years after loading. Data were collected and statistically analyzed using repeated measures analysis of variance test. Results The cumulative implant success rate at 5 years was 100%. There was no statistically significant difference along the time intervals (P ≥ 0.05). Marginal bone loss was 0.796 ± 0.187 after 5 years of function. No complications or implant failure were reported. Conclusions Within the limitations of this study concerning small sample size, age range and the value of glycosylated hemoglobin test, dental implants can be immediately loaded successfully to retain overdentures in type II diabetic edentulous patients.
目的:本队列研究评估ⅱ型糖尿病患者种植体保留覆盖义齿在即刻负荷5年后的疗效。患者与方法30例全牙无牙患者(男18例,女12例),平均年龄62岁。对于每位患者,在椎间孔区插入两个立即加载的种植体,并将球窝附着体植入下颌保留覆盖义齿。患者在基线(覆盖义齿插入)和装填后6个月、1年、3年和5年进行临床和影像学评估。收集资料,采用重复计量分析方差检验进行统计学分析。结果5年累计种植成功率为100%。两组间差异无统计学意义(P≥0.05)。功能5年后,边缘骨损失为0.796±0.187。无并发症或种植体失败的报道。结论在本研究样本量小、年龄范围广、糖化血红蛋白检测值有限的情况下,种植体可立即成功加载用于II型糖尿病无牙患者固位覆盖义齿。
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引用次数: 0
Digital versus conventional impression technique for flabby ridge in complete denture construction 数字印模技术与传统印模技术在全口义齿构建中的对比
Pub Date : 2021-10-01 DOI: 10.4103/tdj.tdj_15_21
Mohammed Gamal Elkafrawy, S. Asal, A. El-Sheikh
Background In the presence of flabby tissue, manufacturing a stable denture becomes a challenge. Flabby ridges will be easily displaced under occlusal stresses owing to unfavorable support, resulting in compromised denture retention. Intraoral digital impression has not been exposed to deal with this problem. Purpose To compare intraoral digital impression versus conventional selective pressure impression technique for maxillary flabby ridge registration in complete denture construction regarding soft tissue assessment. Patients and methods This crossover study enrolled seven completely edentulous patients with a localized maxillary anterior flabby ridge. Each patient received two identical maxillary complete dentures opposing one mandibular complete denture. The first denture was constructed using intraoral scanning of the edentulous maxillary ridge then compressing only the healthy tissues by 0.25 mm using Exocad software to simulate selective pressure technique, the second denture was constructed through conventional selective pressure impression technique. Each maxillary denture was subjectively evaluated for soft tissue response at 15 days and 3 months with 15 days rest period in between, data was statistically analyzed using χ2 test. Results There was statistically significant difference between the two maxillary dentures regarding soft tissue assessment in favor of the second maxillary denture. Conclusion Prosthodontist must pay more attention during intraoral scanning of edentulous arch due to lack of anatomical landmarks. More and more attention must be paid during intraoral scanning of edentulous ridges with flabby tissues due to the difference in the degree of mucosa compressibility.
在组织松弛的情况下,制造稳定的义齿成为一个挑战。软牙脊在咬合应力作用下易发生移位,导致义齿固位受损。口腔内数字印模暴露尚未解决这一问题。目的比较口腔内数字印模技术与传统的选择性压力印模技术在全口义齿构建中上颌松弛脊配准的软组织评估。患者和方法本交叉研究纳入了7例局部上颌前嵴松弛的完全无牙患者。每位患者均接受两个相同的上颌全口义齿与一个下颌全口义齿相对。第一义齿采用口腔内扫描无牙上颌嵴,然后使用Exocad软件模拟选择性压力技术对健康组织进行0.25 mm的压缩,第二义齿采用传统的选择性压力印模技术。分别在第15天和第3个月主观评价每个义齿的软组织反应,中间休息15 d,数据采用χ2检验进行统计学分析。结果两种上颌义齿的软组织评分差异有统计学意义,第二种上颌义齿评分较高。结论无牙弓缺乏解剖标志,在进行口腔内扫描时,义齿医师应多加注意。由于无牙脊的黏膜压缩性存在差异,因此在口腔内扫描无牙脊时必须引起越来越多的重视。
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引用次数: 0
Angina ludovici-submandibular swelling: A case report 鹅黄色心绞痛-下颌下肿胀1例
Pub Date : 2021-10-01 DOI: 10.4103/tdj.tdj_2_21
A. Ravi, Manasa Suresh, Anita Varghese, S. Levingston, Preethi A. Poonja, P. Rao, Raghavendra Kini
Ludwig's angina is firm, acute, toxic cellulitis of the submandibular and sublingual spaces bilaterally and of the submental space. As early as 1796, extraction of abscessed teeth was considered contraindicated because it might give rise to extensive inflammation and angina in a dangerous degree. Three fs became evident even before the first written description of the disease: it was to be feared, it rarely becomes fluctuant, and it was often fatal. A sensation of chocking and suffocation (angina) often was combined with the name of the author (Ludwig's) who fully described it in 1836. Here we report a case of Ludwig's angina in a 34-year-old female.
路德维希心绞痛是一种坚固的、急性的、中毒性的蜂窝织炎,发生在双侧的下颌下和舌下空间以及颏下空间。早在1796年,拔牙就被认为是禁忌的,因为它可能会引起广泛的炎症和心绞痛,达到危险的程度。甚至在对这种疾病的第一次书面描述之前,三个f就已经很明显了:它令人恐惧,它很少波动,而且它通常是致命的。窒息和窒息的感觉(心绞痛)经常与作者(路德维希)的名字联系在一起,他在1836年完整地描述了这种感觉。我们在此报告一位34岁女性的路德维希心绞痛。
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引用次数: 0
Fractured zirconia restorations repair bonding durability using two different adhesives 断裂的氧化锆修复修复粘合耐久性使用两种不同的粘合剂
Pub Date : 2021-10-01 DOI: 10.4103/tdj.tdj_5_21
Ibraheem Haidar, Gaber Masoud, M. Shakal
Purpose This study aimed to evaluate the shear bond strength and durability of two different adhesives used to repair fractured zirconia restorations before and after water storage and thermocycling stress. Materials and methods Forty zirconia disc samples (10 mm in diameter, 2 mm in thickness) were prepared by CAD/CAM systems (SILADENT) divided in two main groups: (a) group 1: 20 samples were treated with Futurabond M+ adhesive, (b) group 2: 20 samples were treated with Panavia F 2.0 adhesive. All samples were individually and horizontally mounted on a computer-controlled materials testing machine with a load cell of 5 kN and data were recorded using computer software. Intragroup analysis and comparison between two groups will be done using one way analysis of variance test. Results Data were presented as mean, SD, range (minimum–maximum) for numerical values. Student t test and analysis of variance were used to study the effect of cements and thermal aging on mean values. χ2 test was done between failure modes scores. The significance level was set at P value less than or equal to 0.05 and 95% confidence interval. Shear bond strength descriptive statistics of shear bond strength (MPa) showing mean, SD, minimum, maximum, and 95% confidence intervals (low and high) values for both cement groups before and after thermal aging. Conclusion There is significant difference between shear bond strength before and after aging in case of Futurabond M+ but in case of Panavia F 2.0 the difference is nonsignificant. Panavia F 2.0 has comparable shear bond strength to Futurabond M+ in case of water storage and thermocycling aging but in nonaging, Futurabond M+ show higher shear bond strength than Panavia F 2.0. Panavia F 2.0 has provided stable bonding values even with water storage and thermocycling stress.
目的评价两种不同的胶粘剂在水储存和热循环应力前后修复断裂氧化锆修复体的剪切粘接强度和耐久性。材料与方法采用CAD/CAM系统(SILADENT)制备直径10 mm,厚度2 mm的氧化锆圆盘样品40个,分为两组:(a)组1:20个样品用Futurabond M+胶粘剂处理,(b)组2:20个样品用Panavia F 2.0胶粘剂处理。所有样品分别水平安装在5千牛称重传感器的计算机控制的材料试验机上,并使用计算机软件记录数据。组内分析和两组间比较采用单向方差分析检验。结果数据以平均值、标准差、数值范围(最小-最大值)表示。采用学生t检验和方差分析研究水泥和热老化对平均值的影响。失效模式评分之间进行χ2检验。显著性水平设置为P值小于或等于0.05,95%置信区间。抗剪粘结强度(MPa)描述性统计,显示热老化前后两组水泥的均值、标准差、最小值、最大值和95%置信区间(低和高)值。结论Futurabond M+与Panavia f2.0老化前后抗剪强度差异显著,而Panavia f2.0老化前后抗剪强度差异不显著。在储水和热循环老化情况下,Panavia f2.0的剪切结合强度与Futurabond M+相当,而在非老化情况下,Futurabond M+的剪切结合强度高于Panavia f2.0。Panavia f2.0即使在储水和热循环应力下也能提供稳定的键合值。
{"title":"Fractured zirconia restorations repair bonding durability using two different adhesives","authors":"Ibraheem Haidar, Gaber Masoud, M. Shakal","doi":"10.4103/tdj.tdj_5_21","DOIUrl":"https://doi.org/10.4103/tdj.tdj_5_21","url":null,"abstract":"Purpose This study aimed to evaluate the shear bond strength and durability of two different adhesives used to repair fractured zirconia restorations before and after water storage and thermocycling stress. Materials and methods Forty zirconia disc samples (10 mm in diameter, 2 mm in thickness) were prepared by CAD/CAM systems (SILADENT) divided in two main groups: (a) group 1: 20 samples were treated with Futurabond M+ adhesive, (b) group 2: 20 samples were treated with Panavia F 2.0 adhesive. All samples were individually and horizontally mounted on a computer-controlled materials testing machine with a load cell of 5 kN and data were recorded using computer software. Intragroup analysis and comparison between two groups will be done using one way analysis of variance test. Results Data were presented as mean, SD, range (minimum–maximum) for numerical values. Student t test and analysis of variance were used to study the effect of cements and thermal aging on mean values. χ2 test was done between failure modes scores. The significance level was set at P value less than or equal to 0.05 and 95% confidence interval. Shear bond strength descriptive statistics of shear bond strength (MPa) showing mean, SD, minimum, maximum, and 95% confidence intervals (low and high) values for both cement groups before and after thermal aging. Conclusion There is significant difference between shear bond strength before and after aging in case of Futurabond M+ but in case of Panavia F 2.0 the difference is nonsignificant. Panavia F 2.0 has comparable shear bond strength to Futurabond M+ in case of water storage and thermocycling aging but in nonaging, Futurabond M+ show higher shear bond strength than Panavia F 2.0. Panavia F 2.0 has provided stable bonding values even with water storage and thermocycling stress.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"18 1","pages":"120 - 127"},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85312820","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
Calcifying epithelial odontogenic tumor of the maxilla (Pindborg tumor): surgical and immunohistochemical approach 上颌骨钙化上皮性牙源性肿瘤(Pindborg肿瘤):手术和免疫组织化学方法
Pub Date : 2021-10-01 DOI: 10.4103/tdj.tdj_13_21
I. Nowair, O. Wahba, A. Al Shareef
Background Calcifying epithelial odontogenic tumor (CEOT) is a benign but locally aggressive epithelial odontogenic tumor that most commonly occurs in the mandible. Although the maxillary CEOT is rare, its biological behavior is indolent. Aim A comprehensive immunohistochemical study was performed concerning the local aggressive behavior of this tumor. Patients and methods In this study, 12 cases of patients who were attended in the outpatient clinic of the Oral and Maxillofacial Department, Faculty of Dentistry, Tanta University were included in this study after confirmed incisional biopsy of CEOT. The patients were examined clinically preoperative and aspiration test was done. After finishing the tumor resection, closure of the maxillary defect was done by double layer repair of the defect. Biopsy of this tumor was stained by the following markers p63, Ki67, type IV collagen, smooth muscle actin (SMA), CK19, CK5/6, S100 to study the biological behavior of the tumor. Results The neoplastic cells were diffusely cytoplasmic immunoreactive for CK19 and CK5/6. Also, the tumor cells showed mild to moderate staining to SMA. Weak intensity of collagen type IV was detected. The amyloid-like deposit was immunonegative for both SMA and type IV collagen. p63 was expressed in all studied cases. Strong to moderate nuclear staining to p63 was detected in the tumor cells. The Ki67 showed high proliferation activity of tumor cells differing from the benign tumor nature. Conclusion Maxillary CEOT tends to grow more rapidly and not be circumscribed, suggesting that more aggressive surgery is required in these specific cases.
背景钙化上皮性牙源性肿瘤(CEOT)是一种良性但局部侵袭性的上皮性牙源性肿瘤,最常见于下颌骨。虽然上颌CEOT是罕见的,其生物学行为是惰性的。目的对该肿瘤的局部侵袭行为进行全面的免疫组化研究。患者与方法本研究选取谭大大学牙科学院口腔颌面科门诊确诊的CEOT切口活检患者12例作为研究对象。术前对患者进行临床检查,并进行吸痰试验。完成肿瘤切除后,采用双层修复术对上颌缺损进行封闭。肿瘤活检采用p63、Ki67、IV型胶原、平滑肌肌动蛋白(SMA)、CK19、CK5/6、S100等标志物进行染色,研究肿瘤的生物学行为。结果肿瘤细胞对CK19和CK5/6具有弥漫性细胞质免疫反应。肿瘤细胞对SMA呈轻至中度染色。检测到IV型胶原蛋白的弱强度。淀粉样沉积物对SMA和IV型胶原均呈免疫阴性。P63在所有病例中均有表达。在肿瘤细胞中检测到p63强至中度核染色。Ki67表现出与良性肿瘤不同的高增殖活性。结论上颌CEOT生长迅速且不局限,这类特殊病例需要更积极的手术治疗。
{"title":"Calcifying epithelial odontogenic tumor of the maxilla (Pindborg tumor): surgical and immunohistochemical approach","authors":"I. Nowair, O. Wahba, A. Al Shareef","doi":"10.4103/tdj.tdj_13_21","DOIUrl":"https://doi.org/10.4103/tdj.tdj_13_21","url":null,"abstract":"Background Calcifying epithelial odontogenic tumor (CEOT) is a benign but locally aggressive epithelial odontogenic tumor that most commonly occurs in the mandible. Although the maxillary CEOT is rare, its biological behavior is indolent. Aim A comprehensive immunohistochemical study was performed concerning the local aggressive behavior of this tumor. Patients and methods In this study, 12 cases of patients who were attended in the outpatient clinic of the Oral and Maxillofacial Department, Faculty of Dentistry, Tanta University were included in this study after confirmed incisional biopsy of CEOT. The patients were examined clinically preoperative and aspiration test was done. After finishing the tumor resection, closure of the maxillary defect was done by double layer repair of the defect. Biopsy of this tumor was stained by the following markers p63, Ki67, type IV collagen, smooth muscle actin (SMA), CK19, CK5/6, S100 to study the biological behavior of the tumor. Results The neoplastic cells were diffusely cytoplasmic immunoreactive for CK19 and CK5/6. Also, the tumor cells showed mild to moderate staining to SMA. Weak intensity of collagen type IV was detected. The amyloid-like deposit was immunonegative for both SMA and type IV collagen. p63 was expressed in all studied cases. Strong to moderate nuclear staining to p63 was detected in the tumor cells. The Ki67 showed high proliferation activity of tumor cells differing from the benign tumor nature. Conclusion Maxillary CEOT tends to grow more rapidly and not be circumscribed, suggesting that more aggressive surgery is required in these specific cases.","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"11 1","pages":"128 - 134"},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78787448","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
Maxillary midline diastema among a group of Egyptian adult populations (prevalence and etiology) 上颌中线龋病在埃及成年人群中的患病率和病因分析
Pub Date : 2021-10-01 DOI: 10.4103/tdj.tdj_34_20
A. Rashid, A. Khalifa
Purpose This study was performed to identify the prevalence and etiological factors of maxillary midline diastema among a sample of adult patients undergoing orthodontic treatment in orthodontic private clinics in Qaloubya, Fayoum, and Giza governorates. Patients and methods Three hundred seventy-five patients (199 females and 176 males) were included in this study. The full records (intraoral photographies and radiographs) of all patients were examined and surveyed for the presence or absence of maxillary midline diastema and the possible etiological factors. Results 17.3% of the studied patients showed maxillary midline diastema, while 82.7% of them did not show diastema. There was no significant difference between the prevalence of midline diastema in different sexes (P = 0.079). The most common etiological factors were 38.5% congenitally missed laterals, 33.8% highly attached frenum, 20.0% generalized spaces, and 26.2% had flared incisors. Conclusion Prevalence of midline diastema in the studied patients was 17.3%, while 82.7% of patients did not have diastema.
目的本研究旨在确定在Qaloubya, Fayoum和Giza省正畸私人诊所接受正畸治疗的成年患者中上颌中线间隙的患病率和病因。患者与方法本研究共纳入375例患者,其中女性199例,男性176例。检查所有患者的完整记录(口内摄影和x线片),调查上颌中线膈膜的存在或不存在以及可能的病因。结果上颌中线扩张率为17.3%,未出现扩张率为82.7%。不同性别中线肺气肿患病率差异无统计学意义(P = 0.079)。最常见的病因是先天性外侧缺失(38.5%)、系带高度附着(33.8%)、间隙广泛性(20.0%)和门牙外展(26.2%)。结论中线肺气肿发生率为17.3%,无中线肺气肿发生率为82.7%。
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引用次数: 0
Microstrain analysis of implants retained complete mandibular overdenture by using two different attachments (an in vitro study) 两种附着体对种植体固位下颌覆盖义齿微应变分析(体外研究)
Pub Date : 2021-07-01 DOI: 10.4103/tdj.tdj_41_19
Madiha Abo Goher, Zeinab El-Shorbagy, Zainab Abdul Aal
Purpose The aim of this work is to evaluate strain analysis of two piece implants retained complete edentulous mandibular overdenture with two different attachment systems bar and clip attachment and extracoronal resilient attachment (ERA + bar) by using strain gauge analysis. Materials and Methods This in vitro strain analysis of implants retained complete mandibular overdenture with two attachments carried out on two completely edentulous mandibular models covered by 2 mm thickness mucosa. Two finished dentures were constructed one denture for each group. Group 1: two implants at canine region with bar attachment. Group 2: two implants at canine region with bar and ERA attachments. Four strain gauges were cemented around each implant, buccal, lingual, mesial, and distal. A 50 N static load was applied on the experimental model in vertical and oblique directions. Strain data of each group was collected tabulated and statically analyzed. Results The result of this study revealed that the difference of microstrain between the two groups was significant as the maximum microstrain recorded was found in group 1 followed by group 2. The oblique forces increase the resulting strain than vertical forces. Conclusion There are different patterns of strain analysis at bone–implant interface between the studied attachment designs, the ERA-bar combination exhibited better strain analysis than bar-clip system
目的应用应变计分析两种不同附着体(棒夹附着体)和冠外弹性附着体(ERA +棒)的下颌覆盖义齿的应变分析。材料与方法在2个覆盖厚度为2mm的全颌无牙模型上,对种植体保留下颌双附着体覆盖义齿进行体外应变分析。每组1个义齿,制作2个义齿。组1:犬区种植体2枚,棒状附着。第二组:犬区种植体2枚,配以棒状和ERA附着体。四个应变片粘接在每个种植体周围,颊,舌,中,远端。实验模型在垂直和斜向上分别施加50 N静载荷。将各组应变数据制成表格并进行统计学分析。结果本研究结果显示,两组之间的微应变差异显著,1组记录的微应变最大,2组次之。斜向力比垂直力增加了产生的应变。结论不同的附着体设计在骨-种植体界面处具有不同的应变分析模式,ERA-bar组合比bar-clip系统具有更好的应变分析效果
{"title":"Microstrain analysis of implants retained complete mandibular overdenture by using two different attachments (an in vitro study)","authors":"Madiha Abo Goher, Zeinab El-Shorbagy, Zainab Abdul Aal","doi":"10.4103/tdj.tdj_41_19","DOIUrl":"https://doi.org/10.4103/tdj.tdj_41_19","url":null,"abstract":"Purpose The aim of this work is to evaluate strain analysis of two piece implants retained complete edentulous mandibular overdenture with two different attachment systems bar and clip attachment and extracoronal resilient attachment (ERA + bar) by using strain gauge analysis. Materials and Methods This in vitro strain analysis of implants retained complete mandibular overdenture with two attachments carried out on two completely edentulous mandibular models covered by 2 mm thickness mucosa. Two finished dentures were constructed one denture for each group. Group 1: two implants at canine region with bar attachment. Group 2: two implants at canine region with bar and ERA attachments. Four strain gauges were cemented around each implant, buccal, lingual, mesial, and distal. A 50 N static load was applied on the experimental model in vertical and oblique directions. Strain data of each group was collected tabulated and statically analyzed. Results The result of this study revealed that the difference of microstrain between the two groups was significant as the maximum microstrain recorded was found in group 1 followed by group 2. The oblique forces increase the resulting strain than vertical forces. Conclusion There are different patterns of strain analysis at bone–implant interface between the studied attachment designs, the ERA-bar combination exhibited better strain analysis than bar-clip system","PeriodicalId":22324,"journal":{"name":"Tanta Dental Journal","volume":"177 1","pages":"84 - 87"},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85567022","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 rare case report of adenomatoid odontogenic tumor in the mandibular anterior region 摘要罕见的下颌前区腺瘤样牙源性肿瘤1例报告
Pub Date : 2021-07-01 DOI: 10.4103/tdj.tdj_10_21
Joseph Johny, P. Sasikumar, Neethu Kuttipurath, Anjana Krishna, Rejni Varghese
Adenomatoid odontogenic tumor is a relatively uncommon, benign (hamartomatous), noninvasive neoplasm of odontogenic origin with slow but progressive growth. It affects young individuals with a female predominance, mainly occurring in the second decade of life and has a striking tendency to occur in the anterior maxilla. Herewith, we present a rare case report of an unusual case of adenomatoid odontogenic tumor located in the mandibular anterior left region.
腺瘤样牙源性肿瘤是一种相对罕见的良性(错构瘤)、非侵袭性的牙源性肿瘤,生长缓慢但呈进行性发展。它影响以女性为主的年轻人,主要发生在生命的第二个十年,并有显著的趋势发生在前上颌骨。在此,我们提出一个罕见的病例报告,一个不寻常的腺瘤样牙源性肿瘤位于下颌左前区。
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引用次数: 0
期刊
Tanta Dental Journal
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