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EVALUATION OF THE VERTICAL MARGINAL GAP OF THREE CAD/CAM CERAMIC SYSTEM AFTER CYCLIC LOADING 循环加载后三cad / cam陶瓷系统垂直边缘间隙的评价
Pub Date : 2023-07-01 DOI: 10.21608/ajdsm.2022.117476.1292
Emad Eldin Elsharkawy, Ahmad El-Kouedi, Tamer E. Shokry
Objective: The objective of this in vitro study was to evaluate the marginal accuracy of different CAD/CAM ceramic crowns after thermo-mechanical cyclic loading. Material and methods: The marginal accuracy of a polymer-infiltrated ceramic network (PICN) material (Vita Enamic [VE]) was compared to two machinable glass ceramics; Zirconia-reinforced lithium silicate (Vita Suprinity [VS]) and a lithium disilicate glass ceramic (IPS e.max. CAD, IPS). 30 natural premolar teeth of average size were prepared (n=10 each group) by computer numerical control (CNC) to fulfill the criteria of all ceramic crown design. Optical impressions were taken for each tooth preparation using the CAD/CAM scanner. 30 crowns were milled from ceramic blocks based on the optical data. A total of 30 crowns were fabricated using CAD/CAM system, and divided into three groups (IPS e.max, VE and VS). The vertical marginal gap was measured using stereomicroscope before, after cementation and after thermo mechanical cyclic loading. Results: No statistically significant difference in vertical marginal gap within or between groups of three tested materials before, after cementation and after thermo mechanical cyclic loading. Conclusions: Vertical marginal adaptation of all tested ceramics was within the clinically acceptable values.
目的:评价不同CAD/CAM陶瓷冠在热机械循环加载后的边缘精度。材料和方法:比较了聚合物渗透陶瓷网络(PICN)材料(Vita Enamic [VE])与两种可加工玻璃陶瓷的边缘精度;氧化锆增强硅酸锂(Vita Suprinity [VS])和二硅酸锂玻璃陶瓷(IPS e.max。CAD, IPS)。采用计算机数控(CNC)法制备平均尺寸天然前磨牙30颗(每组10颗),满足全瓷冠设计标准。使用CAD/CAM扫描仪对每个牙齿制备进行光学印模。根据光学数据,从陶瓷块中铣削30个冠。采用CAD/CAM系统制作30个冠状体,分为3组(IPS e.max、VE和VS)。采用立体显微镜测量了胶结前后和热-机械循环加载前后的垂直边缘间隙。结果:三种被试材料在胶结前后和热-机械循环加载后,组内和组间的垂直边缘间隙均无统计学差异。结论:所有测试陶瓷的垂直边缘适应性均在临床可接受的范围内。
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引用次数: 0
MICROLEAKAGE OF LOW SHRINKAGE RESIN BASED COMPOSITE WITH AND WITHOUT LINER USING DIFFERENT TYPES OF ADHESIVE SYSTEMS. 低收缩树脂基复合材料的微泄漏,使用不同类型的粘合剂系统。
Pub Date : 2023-07-01 DOI: 10.21608/ajdsm.2021.100304.1256
khaled rukhsi, M. Atta, Belal Ahmed
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引用次数: 0
The Effectiveness Of Topical Avocado In The Treatment Of Minor Recurrent Aphthous Ulceration: A Randomized Controlled Clinical Trial 局部牛油果治疗轻微复发性口疮溃疡的有效性:一项随机对照临床试验
Pub Date : 2023-07-01 DOI: 10.21608/ajdsm.2022.175902.1385
S. Amer
Objective: Recurrent aphthous ulceration (RAU) is a common condition , Different treatment modalities have been suggested to either eradicate or reduce the duration of ulcer recurrences . Aim of this research was to determine the effectiveness of topically applied 0.5% avocado gel in the treatment of (RAU) . Subjects and method: Sixty patients in the ulcerative stage of RAU were divided at random among two groups . Group I: Patients received topical 0.5% avocado gel three times daily for seven days. GroupII : Patients received topical placebo gel three times daily for seven days. The patients were examined at the time of initial visit before treatment administration and on the fourth and the seventh day of treatment. Results : The results showed that topical 0.5% avocado gel were more effective than placebo gel in the management of minor recurrent aphthous RAU ulceration as it reduces the pain after its application more than the placebo gel alone. Patients on 0.5% topical avocado gel therapy revealed less degree of erythema, decrease in ulcer size and healing period than patients on the placebo therapy. Conclusion: Topical avocado gel may be considerd a reasonable treatment of minor RAU as it reduces pain,erythema and ulcers size and accelerates its healing .
目的:复发性口腔溃疡(RAU)是一种常见的疾病,不同的治疗方法被建议根除或缩短溃疡复发的时间。本研究的目的是确定局部应用0.5%鳄梨凝胶治疗(RAU)的有效性。对象和方法:60例溃疡期RAU患者随机分为两组。第一组:患者局部服用0.5%牛油果凝胶,每日三次,持续7天。组i:患者接受局部安慰剂凝胶治疗,每日3次,连续7天。患者在治疗前首次就诊时以及治疗的第4天和第7天进行检查。结果:外用0.5%牛油果凝胶治疗轻微复发性口疮RAU溃疡的效果优于安慰剂凝胶,其减轻疼痛的效果优于单独使用安慰剂凝胶。接受0.5%牛油果凝胶治疗的患者比接受安慰剂治疗的患者红斑程度更轻,溃疡大小和愈合时间也更短。结论:局部牛油果凝胶可以减轻疼痛、红斑和溃疡的大小,并加速其愈合,是一种合理的治疗轻微RAU的方法。
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引用次数: 0
Evaluation of the effect of vitamin D on the salivary and serum levels of interleukin-8 in patients with periodontitis stage I and II grade A. 评价维生素D对ⅰ期和ⅱ期A级牙周炎患者唾液和血清白细胞介素-8水平的影响。
Pub Date : 2023-07-01 DOI: 10.21608/ajdsm.2021.95374.1240
A. Saleh, M. Fekry, mostafa hoseny
Objectives: Evaluate the effect of vitamin D in conjugation with phase 1 periodontal therapy on the GCF, salivary and serum level of IL-8 in periodontitis stage I and II grade A patients. Subjects and Methods: A total of 40 medically healthy adult subjects with periodontitis stage I and II grade A. Twenty patients received a full mouth supra –and sub-gingival scaling and root planning, in addition to vitamin D (one alpha 0.5mcg) one capsules daily for 6 months. Control group: twenty patients received a full mouth supra – and sub-gingival scaling and root planing only. Samples Collection of Gingival Crevice Fluid, blood samples and saliva before treatment and 3 and 6 months after: Clinical evaluation and Serum level of vitamin D, Serum, salivary and GCF levels of IL-8. Results: Study group after treatment for 6 months showed a higher mean vitamin D % increase ( ↑ 117.41 ± 46.82) from baseline than control group ( ↑ 2.77±20.34) The results showed, also,that study group reported a reduction in GCF IL-8 % while control group increased, at both observation period of 3and 6 month. At 3 months, study group showed a reduction in Serum IL-8% from baseline than control group. At 6 months, Study group showed a reduction in Serum IL-8% from baseline while control group increased. There was a negative correlation between vitamin D and IL-8. Conclusion: Vitamin D supplementation may reduce the severity of periodontal disease. Vitamin D may have a potential role in the inhibition of periodontal inflammation by inhibiting the IL-8 expression
目的:评价维生素D联合1期牙周治疗对牙周炎I期和II期A级患者GCF、唾液和血清IL-8水平的影响。对象和方法:共有40名医学上健康的成人牙周炎I期和II级A级患者,其中20名患者在服用维生素D (1 α - 0.5mcg) 1粒胶囊的基础上,每天进行全口牙龈上和牙龈下的洗牙和牙根规划,持续6个月。对照组:20例患者仅行全口龈上、龈下刮治和牙根刨平。治疗前及治疗后3、6个月龈沟液、血、唾液标本采集:临床评价及血清维生素D水平、血清、唾液及龈沟液中IL-8水平。结果:研究组治疗6个月后较基线平均维生素D %升高(↑117.41±46.82)高于对照组(↑2.77±20.34),且研究组GCF IL-8降低8%,对照组升高,观察3个月和6个月。在3个月时,研究组显示血清il比基线降低8%。6个月时,研究组血清il水平较基线下降8%,而对照组升高。维生素D与IL-8呈负相关。结论:补充维生素D可降低牙周病的严重程度。维生素D可能通过抑制IL-8的表达而起到抑制牙周炎症的作用
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引用次数: 0
Efficacy of Mandibular protraction appliance IV versus PowerScope in treatment of class II malocclusion; A comparative, randomized clinical trial 下颌牵引器IV与PowerScope治疗II类错颌畸形的疗效比较一项比较、随机的临床试验
Pub Date : 2023-07-01 DOI: 10.21608/ajdsm.2022.172089.1381
Abubakr Abd-Elhamid, Ezzat Abdel-Fattah, Ramadan Abu-Shahba
Objective: To evaluate and compare the efficacy of Mandibular protraction appliance IV (MPA-IV) and PowerScope (PS) in the treatment of skeletal Class II malocclusion patients. Subjects and methods : A total of 16 circumpubertal class II patients (ANB°>4°) with mandibular deficiency were randomly divided equally into two groups; group 1: treated by MPA-IV, their mean age was 14.98 ± 1.33 years, group 2: treated by PS appliance (American Orthodontics, Sheboygan, Wis), their mean age was 14.67 ± 1.37 years. In both groups, fixed functional appliances were installed for six months. Treatment outcomes were assessed by cephalograms taken immediately pre-and post-functional appliances therapy. Results : Intergroup comparisons of the mean treatment changes revealed significant improvements (P ≤ .05) in SNB°, SN-Pog°, Ar-Go-Me°, Co-Gn mm, B-Sv mm, Pog-Sv mm, S-Go mm, and lower lip advancement (Li-Sv mm and Pog’-Sv mm) in MPA-IV group. While in the PS group, there were significant greater decrease of SNA° and upper incisors retraction (P ≤ .05). Conclusion: Both appliances could be used efficiently in the treatment of class II malocclusion. MPA-IV produces superior mandibular advancement and lower lip projection, while the effects of PS are mainly dentoalveolar changes.
目的:评价和比较下颌牵引矫治器IV (MPA-IV)与PowerScope (PS)治疗骨性ⅱ类错颌畸形的疗效。对象与方法:选取16例下颌缺颌患者(ANB°>4°),随机分为两组;组1:采用MPA-IV治疗,平均年龄14.98±1.33岁;组2:采用PS矫治器(American Orthodontics, Sheboygan, Wis)治疗,平均年龄14.67±1.37岁。两组均安装固定功能器具6个月。通过在功能器具治疗前后立即拍摄的脑电图来评估治疗结果。结果:组间平均治疗变化比较显示,MPA-IV组的SNB°、SN-Pog°、Ar-Go-Me°、Co-Gn mm、B-Sv mm、Pog-Sv mm、S-Go mm和下唇推进(Li-Sv mm和Pog ' -Sv mm)均有显著改善(P≤0.05)。而PS组SNA°和上切牙后缩回下降幅度更大(P≤0.05)。结论:两种矫治器均可有效治疗ⅱ类错牙合。MPA-IV的作用主要是下颌上突和下唇突出,而PS的作用主要是牙槽牙的改变。
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引用次数: 0
Simultaneous implant placement with bone grafting to the thin buccal plate of bone using xenograft in areas of inadequate width in posterior mandible. 在后下颌骨宽度不足的区域使用异种移植物同时植入骨薄颊板。
Pub Date : 2023-07-01 DOI: 10.21608/ajdsm.2021.95369.1239
A. Derar, A. Hosni, W. Elmohandes
Objective: The collapse of bone is considered to be a normal physiological change following the extraction if no measure of socket preservation was applied. This study was performed using pericardium collagen membrane and xenograft for horizontal width augmentation simultaneously with the placement of implant. To evaluate the amount of new bone gain cone beam computed tomograpghy (CBCT) was used. Subjects and methods : Fifteen patients who met the inclusion criteria were selected from outpatient clinic in the Faculty of Dentistry, Al-Azhar University (boys-Cairo). All the patients showed narrow width in the lower posterior edentulous ridge that need to be restored by implant placement. All the cases had guided bone regeneration procedure using xenograft and pericardium membrane. The ridge width was measured preoperatively and 6 months post operatively using (CBCT) to evaluate the amount of bone gain. Results: The ridge width showed a significant increase from 4.51±0.56 pre-operatively to 6.61±0.44 immediately post-operative. This was followed by a decrease to 4.71± 0.6 after 6 months postoperatively. There was no significant difference between values recorded pre-operatively and after 6 months. Conclusion: The results of the current study do not support the use of bovine pericardium membrane with xenografts in horizontal bone augmentation simultaneously with implant placement.
目的:如果不采取保留牙槽骨的措施,骨塌陷被认为是拔牙后正常的生理变化。本研究采用心包胶原膜和异种移植物在植入植入物的同时进行水平宽度增大。采用锥形束计算机断层扫描(CBCT)评价新骨增重的数量。对象和方法:从爱资哈尔大学(开罗)牙科学院门诊选取符合纳入标准的患者15例。所有患者均表现为无牙下牙嵴狭窄,需通过种植体修复。所有病例均行异种骨移植心包膜引导骨再生手术。术前和术后6个月采用CBCT测量脊宽,评估骨增重量。结果:脊宽由术前的4.51±0.56明显增加到术后即刻的6.61±0.44。术后6个月下降至4.71±0.6。术前与术后6个月间无明显差异。结论:目前的研究结果不支持牛心包膜异种移植物在水平骨增强术中与植入物同时使用。
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引用次数: 0
Patient satisfaction and soft tissue changes around BioHPP® bar compared to cobalt chromium bar retaining mandibular implant-over dentures: A randomized clinical trial 与钴铬棒固定下颌种植假牙相比,BioHPP®棒周围的患者满意度和软组织变化:一项随机临床试验
Pub Date : 2023-07-01 DOI: 10.21608/ajdsm.2023.213530.1434
S. Moussa, Hebatalla Mahmoud El Afandy
Objective: To assess patient satisfaction and peri-implant soft tissue changes of PEEK (BioHPP ® ) bar compared to cobalt chromium (Co-Cr) bar retaining four implants mandibular overdenture. Subjects and methods: Ten completely edentulous participants received four implants and were allocated into two groups. Group I: Co-Cr-bar attachment, Group II: BioHPP ® -bar attachment. Mucosal recession (MR), probing depth (PD), modified plaque index (mPI) and modified bleeding index (mBI) were assessed at the time of overdentures insertion (T0), and after twelve months (T12). Patient satisfaction was also evaluated at (T12). Results: Co-cr bars showed significant increase in all studied peri-soft tissue parameters’ readings. In addition, BioHPP ® bars recorded significant better patient satisfaction scores regarding patient comfort, taste of food, esthetics than Co-Cr bars. Conclusion : Both Co-Cr bar and BioHPP® bar connecting implants supporting mandibular overdenture are considered potential treatment options. BioHPP ® bar presented better results than Co-Cr bar concerning soft tissue changes and patient satisfaction.
目的:评价PEEK (BioHPP®)棒与钴铬(Co-Cr)棒固定四种植体下颌覆盖义齿的患者满意度和种植周软组织变化。对象和方法:10名完全无牙者接受4颗种植体,分为两组。第一组:Co-Cr-bar连接,第二组:BioHPP®-bar连接。在覆盖义齿插入时(T0)和12个月后(T12)评估粘膜退行(MR)、探深(PD)、改良斑块指数(mPI)和改良出血指数(mBI)。患者满意度也在(T12)进行评估。结果:Co-cr棒显示所有研究的软组织周围参数读数显著增加。此外,与Co-Cr棒相比,BioHPP®棒在患者舒适度、食物味道和美学方面的患者满意度得分显著提高。结论:Co-Cr棒和BioHPP®棒连接种植体支持下颌覆盖义齿是潜在的治疗选择。在软组织改变和患者满意度方面,BioHPP®棒优于Co-Cr棒。
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引用次数: 0
Effect of using tri-calcium phosphate combined with platelet rich fibrin versus platelet rich plasma in post extraction socket 磷酸三钙联合富血小板纤维蛋白与富血小板血浆在抽采后插管中的作用
Pub Date : 2023-07-01 DOI: 10.21608/ajdsm.2021.76667.1201
mohamed abou shabana, M. Mohaed, Ahmed el feky
Objectives: This study was designed to evaluate the effect of using tricalcium phosphate combined with platelet rich fibrin versus platelet rich plasma in post extraction socket clinically and radiographically at maxillary esthetic zone. Subject and methods: This study was conducted on 30 patient seeking extraction of at least one hopeless tooth, they distributed into 3 groups.10 patients for control group , 10 patients for test group (a) and 10 patients for test group (b). In control group the socket was left to heal spontaneously by clot formation. In test group (a) the socket was filled with beta-tricalcium phosphate as bone graft and platelet rich fibrin. In test group (b) the socket was filled with beta-tricalcium phosphate and platelet rich plasma. CBCT image was taken to compare the vertical, horizontal ridge dimension and bone density pre-operatively and 6 month post-operatively. Result: There was statistically non-significant difference regarding the vertical height, bone width, buccal plate thickness and bone density in both groups pre-operatively. But after 6 months post-operatively there was statistically significant difference regarding three groups in all parameters. The test group (a) that represented βTCP and PRF showed a lower percentage of a change than test group (b) that represented βTCP and PRR than control group. Conclusion: The use of PRF accelerates socket wound healing after tooth extraction as noticed by reducing vertical and horizontal bone loss and maintaining favorable bone density values after 6 months postoperatively.
目的:本研究旨在评价磷酸三钙联合富血小板纤维蛋白与富血小板血浆在上颌美观区拔牙后窝的临床及影像学效果。对象与方法:本研究对30例寻求拔除至少一颗残牙的患者进行研究,将其分为3组。对照组10例,试验组(a) 10例,试验组(b) 10例。对照组留下牙槽自愈形成血栓。实验组(a)用β -磷酸三钙作为骨移植物和富血小板纤维蛋白填充骨窝。试验组(b)内填充β -磷酸三钙和富血小板血浆。术前与术后6个月采用CBCT图像比较纵、横脊尺寸及骨密度。结果:两组患者术前垂直高度、骨宽度、颊板厚度、骨密度差异均无统计学意义。但术后6个月三组间各项指标比较,差异均有统计学意义。代表βTCP和PRF的试验组(a)比代表βTCP和PRR的试验组(b)的变化百分比低于对照组。结论:使用PRF可减少拔牙后窝口创面垂直和水平骨丢失,术后6个月保持良好的骨密度值,促进拔牙后窝口创面愈合。
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引用次数: 0
Evaluation of clinical effect of titanium-prepared platelet-rich fibrin and platelet- rich fibrin in treatment of gingival recession 钛制备的富血小板纤维蛋白与富血小板纤维蛋白治疗牙龈萎缩的临床效果评价
Pub Date : 2023-07-01 DOI: 10.21608/ajdsm.2021.95382.1241
Ibrahim Hassouna, Hazim mandour, mahmoud el destawy
Objectives: The aim of the study is to evaluate the effectiveness of titanium prepared platelet rich fibrin (TPRF) for treatment of gingival recession and comparing it to platelet rich fibrin (PRF). Subjects and methods : This study was conducted on subjects having multiple gingival recession. Twenty-four patients of both sexes, aged between (23-41) and having miller class I, II were selected to participate in the present study. Subjects were randomly divided into two equal groups with coin toss method. The plaque index, gingival index, Periodontal pocket depth, Recession width, Recession depth, Clinical attachment level, Keratinized tissue width, keratinized gingival mucosa, Gingival thickness, T-TRF membrane thickness, and VAS were measured. Results : At 6 and 9 months: there was a statistically significant difference in mean RD in the two groups. T. PRF group showed a less mean RD, RW, and KTW than PRF group. At 9 months: T. PRF group showed a significant higher mean GT than PRF group. At day 3 and 7: T. PRF group showed a significant lower mean VAS than PRF group. Conclusion: In conclusion Within the limits of this study, the results demonstrated that T-PRF procedure is a safe, effective method in treating gingival recessions. In addition, this procedure can be recommended to treat localized or multiple-adjacent gingival recessions without additional surgery. However, future randomized clinical trials with a split-mouth design and larger sample size are essential for evaluating the TPRF efficiency in gingival
目的:评价钛制备富血小板纤维蛋白(TPRF)治疗牙龈萎缩的疗效,并与富血小板纤维蛋白(PRF)进行比较。对象与方法:本研究以多发性牙龈萎缩患者为研究对象。选择24例年龄在23-41岁之间,miller I、II级的男女患者参与本研究。采用抛硬币法将受试者随机分为两组。测量菌斑指数、牙龈指数、牙周袋深度、退缩宽度、退缩深度、临床附着水平、角化组织宽度、角化牙龈黏膜、牙龈厚度、T-TRF膜厚度、VAS。结果:6、9个月时,两组患者平均RD比较,差异有统计学意义。PRF组RD、RW、KTW平均值低于PRF组。9个月时,PRF组的平均GT显著高于PRF组。在第3天和第7天,PRF组的平均VAS明显低于PRF组。结论:在本研究范围内,T-PRF是一种安全、有效的治疗牙龈萎缩的方法。此外,该方法可推荐用于治疗局部或多发邻近牙龈衰退而无需额外手术。然而,未来的随机临床试验需要采用裂口设计和更大的样本量来评估TPRF在牙龈中的效果
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引用次数: 0
Evaluation of Silver Diamine Fluoride and Sodium Fluoride Varnish in arresting caries progression on primary teeth: A comparative clinical study 评价氟化二胺银和氟化钠清漆在阻止乳牙龋齿进展中的作用:一项比较临床研究
Pub Date : 2023-07-01 DOI: 10.21608/ajdsm.2022.142404.1339
Mohammed Salah El-Din, I. Barakat, A. Abbas
Objectives: The aim of the present study was to compare the effectiveness of silver diamine fluoride (SDF) and sodium fluoride varnish in arresting caries progression on primary teeth. Subjects and methods: This study involved a total of 60 teeth categorized according to the restored primary teeth in two main groups; group A; Anterior teeth (n=30); group B; Posterior teeth (n=30). Then, the anterior teeth were subdivided into two subgroups (n=15); teeth restored with SDF alone (A1) or restored with NaF alone (A2) (n=15). While, the posterior teeth were subdivided into subdivided into two subgroups (n=15); teeth restored with SDF with ART “SMART” (B1) or restored with NaF with ART “SMART” (B2). The clinical and radiographic results in this study was evaluated after 3-months. Results: SDF showed significant clinical success when compared to NaF alone or when used under ART “SMART” technique. While, the anterior teeth showed better results than posterior teeth.the anterior teeth showed significant radiographic success when compared to posterior teeth. Conclusion: The use of SDF solution has better clinical and radiographic outcomes in caries arrest of primary teeth. SDF solution has better caries arrest outcomes in non-cavitated lesion than cavitated lesions in primary teeth.
目的:本研究的目的是比较氟化二胺银(SDF)和氟化钠清漆在阻止乳牙龋齿进展方面的有效性。对象和方法:本研究共涉及60个牙齿,根据修复的乳牙分为两组;A组;前牙(30颗);B组;后牙(30颗)。然后将前牙再分为两个亚组(n=15);单独使用SDF (A1)或单独使用NaF (A2)修复牙齿(n=15)。将后牙再细分为两个亚组(n=15);用ART“SMART”的SDF修复牙齿(B1)或用ART“SMART”的NaF修复牙齿(B2)。本研究的临床和影像学结果在3个月后评估。结果:与单独使用NaF或ART“SMART”技术相比,SDF显示出显著的临床成功。而前牙的修复效果好于后牙。与后牙相比,前牙的x线摄影显示出显著的成功。结论:应用SDF溶液治疗乳牙阻龋具有较好的临床和影像学效果。SDF溶液对乳牙非空化病变的阻龋效果优于空化病变。
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引用次数: 0
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Al-Azhar Journal of Dental Science
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