Pub Date : 2024-03-01DOI: 10.21608/asdj.2023.224094.1181
Yasser Hendy, Geraldine Ahmed, H. Sadek, Rania Khatab
Aim: Assessment of post-operative pain and quantification of bacterial endotoxins in adult patients suffering from necrotic pulp condition with chronic periapical periodontitis by using calcium hydroxide paste intracanal medication with 2% chlorhexidine gel, Calcium hydroxide paste intracanal medication only and with mechanical preparation without intracanal medications. Materials and methods : Forty five patients with single rooted teeth suffering from necrotic pulp status were divided into 3 groups (n=15), the first group received mechanical preparation only , the second group received calcium hydroxide intracanal medication only, while the third group received mixture of calcium hydroxide and 2 % chlorhexidene gel intracanal medication. Numerical rating scale was used to assess the pain experience post operatively while chromogenic end point Limulus Amebocyte Lysate assay (LONZA) was used to quantify the amount of endotoxins. Results: Calcium hydroxide was superior in decreasing the postoperative pain at time interval 4 hours and 24 hours in comparison to the mixture of calcium hydroxide paste and 2 % chlorhexidene gel significantly, while the mixture was better to reduce the endotoxins with statistically insignificant value. Conclusion: Using one of the intracanal medications for 2-week time interval in necrotic teeth can help to allivate postoperative pain and reduce endotoxins.
{"title":"Effect of Combination of Calcium Hydroxide and 2% Chlorhexidine Gel as Intracanal Medications in Comparison to Calcium Hydroxide Paste on Postoperative Pain and Bacterial Endotoxins in Necrotic Teeth: Randomized Clinical Trial","authors":"Yasser Hendy, Geraldine Ahmed, H. Sadek, Rania Khatab","doi":"10.21608/asdj.2023.224094.1181","DOIUrl":"https://doi.org/10.21608/asdj.2023.224094.1181","url":null,"abstract":"Aim: Assessment of post-operative pain and quantification of bacterial endotoxins in adult patients suffering from necrotic pulp condition with chronic periapical periodontitis by using calcium hydroxide paste intracanal medication with 2% chlorhexidine gel, Calcium hydroxide paste intracanal medication only and with mechanical preparation without intracanal medications. Materials and methods : Forty five patients with single rooted teeth suffering from necrotic pulp status were divided into 3 groups (n=15), the first group received mechanical preparation only , the second group received calcium hydroxide intracanal medication only, while the third group received mixture of calcium hydroxide and 2 % chlorhexidene gel intracanal medication. Numerical rating scale was used to assess the pain experience post operatively while chromogenic end point Limulus Amebocyte Lysate assay (LONZA) was used to quantify the amount of endotoxins. Results: Calcium hydroxide was superior in decreasing the postoperative pain at time interval 4 hours and 24 hours in comparison to the mixture of calcium hydroxide paste and 2 % chlorhexidene gel significantly, while the mixture was better to reduce the endotoxins with statistically insignificant value. Conclusion: Using one of the intracanal medications for 2-week time interval in necrotic teeth can help to allivate postoperative pain and reduce endotoxins.","PeriodicalId":505319,"journal":{"name":"Ain Shams Dental Journal","volume":"264 26‐43","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140402873","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}
Pub Date : 2024-03-01DOI: 10.21608/asdj.2024.269498.1213
Asmaa Fahem, Rania Hassan, Khaled El-Haddad
Aim: This work aimed to evaluate the possible prophylactic effect of using Simvastatin as adjunctive treatment to ameliorate the effects of using prednisolone on the healing of the albino rat mandibular molar extraction socket. Materials and Methods: 42 rats were equally divided into 3 groups (I: received distilled water, II received Prednisolone, III: received simvastatin + prednisolone via gastric tube). After 5 weeks, the mandibular 1st molar was extracted then each group was further subdivided into 2 subgroups depending on sacrifice time after extraction: (A: 10 days and B: 21 days). Mandibular molar areas were processed for histomorphometric and immunohistochemical examination using osteonectin marker. The cell counts and new bone area percentage were measured and statistically analyzed using T-test, ANOVA and post hoc tukey tests. Results: Prednisolone significantly decreased the area of new bone, osteoblasts and osteocytes count. Simvastatin had positive effects in the active osteoblasts and recent osteocytes cell counts marked by osteonectin staining and the new bone formation to a comparable level to the control group. The significant effects of Simvastatin on wound healing were indicated by statistical analysis of different parameters. Conclusions: Prednisolone adversely affected the extraction socket healing. Simvastatin leads to minimizing the effects of prednisolone by increasing the cellular count and bone formation.
{"title":"Effect of simvastatin on the extraction socket healing in the mandible of prednisolone-treated albino rat","authors":"Asmaa Fahem, Rania Hassan, Khaled El-Haddad","doi":"10.21608/asdj.2024.269498.1213","DOIUrl":"https://doi.org/10.21608/asdj.2024.269498.1213","url":null,"abstract":"Aim: This work aimed to evaluate the possible prophylactic effect of using Simvastatin as adjunctive treatment to ameliorate the effects of using prednisolone on the healing of the albino rat mandibular molar extraction socket. Materials and Methods: 42 rats were equally divided into 3 groups (I: received distilled water, II received Prednisolone, III: received simvastatin + prednisolone via gastric tube). After 5 weeks, the mandibular 1st molar was extracted then each group was further subdivided into 2 subgroups depending on sacrifice time after extraction: (A: 10 days and B: 21 days). Mandibular molar areas were processed for histomorphometric and immunohistochemical examination using osteonectin marker. The cell counts and new bone area percentage were measured and statistically analyzed using T-test, ANOVA and post hoc tukey tests. Results: Prednisolone significantly decreased the area of new bone, osteoblasts and osteocytes count. Simvastatin had positive effects in the active osteoblasts and recent osteocytes cell counts marked by osteonectin staining and the new bone formation to a comparable level to the control group. The significant effects of Simvastatin on wound healing were indicated by statistical analysis of different parameters. Conclusions: Prednisolone adversely affected the extraction socket healing. Simvastatin leads to minimizing the effects of prednisolone by increasing the cellular count and bone formation.","PeriodicalId":505319,"journal":{"name":"Ain Shams Dental Journal","volume":"114 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140403294","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}
Pub Date : 2024-03-01DOI: 10.21608/asdj.2024.268248.1210
Haidy Alnagdy, Rana Sedky, Khaled Nour
Aim: To observe the changes that occur in the color coordinates of Omnichroma when placed adjacent to different esthetic shades versus separately. Additionally assessing the ability of two instrumental methods in detecting these changes. Materials and Methods: A total of 18 adjoined blocks (measuring 10x6x4mm) and 6 separate resin composite blocks (measuring 10x12x4) were prepared using two metal molds. The adjoined blocks classified according to the two levels of study: Nano-hybrid resin composite (body shade A1, A2 and A3) and measuring device (Clinical spectrophotometry and Cross-polarized digital photography). The separate block is Omnichroma layered over 1mm Omnichroma blocker then adhered with different shades to fabricate the adjoined block. Both blocks are then measured using two instrumental methods clinical spectrophotometry VITA Easyshade V and cross-polarized digital photography. Then ΔL, Δa and Δb were calculated to show the color change between the Omnichroma separate versus adjoined. Statistical analysis was performed by One-way ANOVA, followed by Tukey’s post hoc test. Comparison between both instrumental devices was analyzed using paired t-test. Results: One-way ANOVA showed a statistically significant difference in the color coordinates of Omnichroma separate versus adjoined using both instrumental devices. Paired t-test showed a statistically significant difference in measuring ΔL with all shades, Δa with A1 shade and no statistically significant difference in measuring Δb with both instrumental devices. Conclusion : Omnichroma universal composite exhibited a pronounced red-yellow structural color when approximated to different shades. This color change was better distinguished by cross-polarized digital photography.
{"title":"Evaluation of Color Shifting in Structural Colored Resin Composite Using Two Instrumental Methods","authors":"Haidy Alnagdy, Rana Sedky, Khaled Nour","doi":"10.21608/asdj.2024.268248.1210","DOIUrl":"https://doi.org/10.21608/asdj.2024.268248.1210","url":null,"abstract":"Aim: To observe the changes that occur in the color coordinates of Omnichroma when placed adjacent to different esthetic shades versus separately. Additionally assessing the ability of two instrumental methods in detecting these changes. Materials and Methods: A total of 18 adjoined blocks (measuring 10x6x4mm) and 6 separate resin composite blocks (measuring 10x12x4) were prepared using two metal molds. The adjoined blocks classified according to the two levels of study: Nano-hybrid resin composite (body shade A1, A2 and A3) and measuring device (Clinical spectrophotometry and Cross-polarized digital photography). The separate block is Omnichroma layered over 1mm Omnichroma blocker then adhered with different shades to fabricate the adjoined block. Both blocks are then measured using two instrumental methods clinical spectrophotometry VITA Easyshade V and cross-polarized digital photography. Then ΔL, Δa and Δb were calculated to show the color change between the Omnichroma separate versus adjoined. Statistical analysis was performed by One-way ANOVA, followed by Tukey’s post hoc test. Comparison between both instrumental devices was analyzed using paired t-test. Results: One-way ANOVA showed a statistically significant difference in the color coordinates of Omnichroma separate versus adjoined using both instrumental devices. Paired t-test showed a statistically significant difference in measuring ΔL with all shades, Δa with A1 shade and no statistically significant difference in measuring Δb with both instrumental devices. Conclusion : Omnichroma universal composite exhibited a pronounced red-yellow structural color when approximated to different shades. This color change was better distinguished by cross-polarized digital photography.","PeriodicalId":505319,"journal":{"name":"Ain Shams Dental Journal","volume":"28 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140404395","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}
Pub Date : 2024-03-01DOI: 10.21608/asdj.2023.243198.1189
Esraa Ibrahim, Tarek Abdel Aziz, M. Obeid
Aim : In patients with symptomatic apical periodontitis, this randomized clinical trial evaluated the impact of intraoral cryotherapy treatment on the level of inflammatory mediators. Materials and methods : Two groups, one for cryotherapy and the other for control (n = 10), were randomly assigned to twenty patients with symptomatic apical periodontitis. In the cryotherapy group, when biomechanical preparation was finished, 30 minutes of intraoral cryotherapy application (a cold pack of ice gel covered in a sealed plastic cover) were done. Samples of apical fluid were taken with paper points that extended 2 mm past the apex. In the control group after mechanical preparation and after 30 minutes, and in the cryotherapy group after mechanical preparation and after cold application. The ELISA test was used to measure the levels of substance P. The data were examined using an independent t-test. Results : The cryotherapy group's change in substance P level was greater than that of the control group, but the difference was not statistically significant (P ≥ 0.05). Conclusions : Intraoral cryotherapy is an easy and affordable choice.
目的：在有症状的根尖牙周炎患者中，本随机临床试验评估了口腔内冷冻治疗对炎症介质水平的影响。材料和方法：20 名有症状的根尖牙周炎患者被随机分为两组，一组接受冷冻治疗，另一组接受对照治疗（n = 10）。在冷冻治疗组，当生物力学准备完成后，进行 30 分钟的口内冷冻治疗（在密封的塑料盖上覆盖冰凝胶冷敷包）。用延伸至牙尖 2 毫米处的纸点采集牙尖液样本。对照组在机械准备后和 30 分钟后取样，冷冻治疗组在机械准备后和冷敷后取样。采用 ELISA 试验测量 P 物质的水平。结果：冷冻治疗组的 P 物质水平变化大于对照组，但差异无统计学意义（P≥0.05）。结论 ：口腔内冷冻疗法是一种简便易行、经济实惠的选择。
{"title":"The effect of cryotherapy on substance P expression","authors":"Esraa Ibrahim, Tarek Abdel Aziz, M. Obeid","doi":"10.21608/asdj.2023.243198.1189","DOIUrl":"https://doi.org/10.21608/asdj.2023.243198.1189","url":null,"abstract":"Aim : In patients with symptomatic apical periodontitis, this randomized clinical trial evaluated the impact of intraoral cryotherapy treatment on the level of inflammatory mediators. Materials and methods : Two groups, one for cryotherapy and the other for control (n = 10), were randomly assigned to twenty patients with symptomatic apical periodontitis. In the cryotherapy group, when biomechanical preparation was finished, 30 minutes of intraoral cryotherapy application (a cold pack of ice gel covered in a sealed plastic cover) were done. Samples of apical fluid were taken with paper points that extended 2 mm past the apex. In the control group after mechanical preparation and after 30 minutes, and in the cryotherapy group after mechanical preparation and after cold application. The ELISA test was used to measure the levels of substance P. The data were examined using an independent t-test. Results : The cryotherapy group's change in substance P level was greater than that of the control group, but the difference was not statistically significant (P ≥ 0.05). Conclusions : Intraoral cryotherapy is an easy and affordable choice.","PeriodicalId":505319,"journal":{"name":"Ain Shams Dental Journal","volume":"121 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140403489","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}
Pub Date : 2024-03-01DOI: 10.21608/asdj.2024.267037.1209
Zeinab Ahmed, Sarah Abdel Moniem, O. Ghallab
Aim: The aim of this study was to investigate the effect of time and surface treatments on shear bond strength of repaired fiber reinforced composite to nano-hybrid composite material. Materials and methods: Eighty specimens were prepared of ever-X Posterior (GC Europe). They were equally divided into two groups according to time of repair (after 24 hours and one month). Then, each group subdivided to five subgroups according to surface treatment (1-No surface treatment, 2-Diamond coated bur, two step self-etch adhesive, 3-Diamond coated bur, two step self-etch adhesive, silane, 4-Air abrasion, two step self-etch adhesive, 5-Air abrasion, two step self-etch adhesive, silane). A nano-hybrid composite was added as a material of repair in 2 mm thickness. All groups were thermocycled for 5000 cycles. The two-way ANOVA test was employed for statistical analysis of the data. Results: both the surface treatments and the time of repair had significant effect on SBS of repaired composite. The highest results were achieved in subgroup (Air abrasion and bonding agent) when repaired after one month. Conclusion: One month time relapse has no drastic effect on repair strength of FRC material. Air abrasion is considered a powerful mechanical surface treatment for achieving a highly significant repair strength of FRC material.
{"title":"Bond Strength of Artificially Aged Fiber Reinforced Composite Material. (An in-vitro study)","authors":"Zeinab Ahmed, Sarah Abdel Moniem, O. Ghallab","doi":"10.21608/asdj.2024.267037.1209","DOIUrl":"https://doi.org/10.21608/asdj.2024.267037.1209","url":null,"abstract":"Aim: The aim of this study was to investigate the effect of time and surface treatments on shear bond strength of repaired fiber reinforced composite to nano-hybrid composite material. Materials and methods: Eighty specimens were prepared of ever-X Posterior (GC Europe). They were equally divided into two groups according to time of repair (after 24 hours and one month). Then, each group subdivided to five subgroups according to surface treatment (1-No surface treatment, 2-Diamond coated bur, two step self-etch adhesive, 3-Diamond coated bur, two step self-etch adhesive, silane, 4-Air abrasion, two step self-etch adhesive, 5-Air abrasion, two step self-etch adhesive, silane). A nano-hybrid composite was added as a material of repair in 2 mm thickness. All groups were thermocycled for 5000 cycles. The two-way ANOVA test was employed for statistical analysis of the data. Results: both the surface treatments and the time of repair had significant effect on SBS of repaired composite. The highest results were achieved in subgroup (Air abrasion and bonding agent) when repaired after one month. Conclusion: One month time relapse has no drastic effect on repair strength of FRC material. Air abrasion is considered a powerful mechanical surface treatment for achieving a highly significant repair strength of FRC material.","PeriodicalId":505319,"journal":{"name":"Ain Shams Dental Journal","volume":"55 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140399310","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}
Pub Date : 2024-03-01DOI: 10.21608/asdj.2024.270220.1215
Ebtihal H. Zain Alabdeen, Shadia Elsayed, Ahmed Sapri, Hadeer Alruwaili, Monther Alsharif, Hanan Shokeir, Muath Al-Assaf, Safa Jambi
Aim: The purpose of this study to evaluate and categorize the complexity of extracting impacted mandibular third molars (IMTMs) using cone beam computed tomography (CBCT). Materials and methods: CBCT used to analyze 315 lower third molars from 182 patients who met the inclusion criteria. CBCT scans were acquired with a CS 9300 Premium 3D machine. Patient demographics and IMTM details were recorded by two observers using CS 3D Imaging Software for image analysis. Descriptive statistics were applied to assess criteria for impaction and extraction difficulty. Differences in surgical risk indicators for IMTM extraction were statistically examined between age groups, gender, and ethnicities using Fisher’s exact test. Results: Patients aged 18-75 years showed that mesioangular impaction was most common at 41.90%, followed by horizontal at 30.79%, vertical at 25.72%, distoangular at 0.95%, and inverted at 0.63%. Class IA and IIA classifications were most prevalent at 27.30% and 23.49%, respectively, with Class IIIA being the least common at 1.58%. significantly higher surgical difficulty indicators seen in patients under 40 compared to older patients for right and left IMTMs (p = 0.026 and 0.011, respectively), but no statistically significant differences in these indicators were observed between genders or ethnicities. Conclusion: CBCT examination revealed that mesioangular impaction was the most frequent occurrence, followed by horizontal, vertical, distoangular, and inverted impactions. Class IA and IIA prevalent; Class IIIA least common. Surgical difficulty indication more in younger than 40 years old patients, no gender or ethnicity differences.
{"title":"Evaluation of Impacted Mandibular Third Molars with CBCT: A Cross-Sectional Study","authors":"Ebtihal H. Zain Alabdeen, Shadia Elsayed, Ahmed Sapri, Hadeer Alruwaili, Monther Alsharif, Hanan Shokeir, Muath Al-Assaf, Safa Jambi","doi":"10.21608/asdj.2024.270220.1215","DOIUrl":"https://doi.org/10.21608/asdj.2024.270220.1215","url":null,"abstract":"Aim: The purpose of this study to evaluate and categorize the complexity of extracting impacted mandibular third molars (IMTMs) using cone beam computed tomography (CBCT). Materials and methods: CBCT used to analyze 315 lower third molars from 182 patients who met the inclusion criteria. CBCT scans were acquired with a CS 9300 Premium 3D machine. Patient demographics and IMTM details were recorded by two observers using CS 3D Imaging Software for image analysis. Descriptive statistics were applied to assess criteria for impaction and extraction difficulty. Differences in surgical risk indicators for IMTM extraction were statistically examined between age groups, gender, and ethnicities using Fisher’s exact test. Results: Patients aged 18-75 years showed that mesioangular impaction was most common at 41.90%, followed by horizontal at 30.79%, vertical at 25.72%, distoangular at 0.95%, and inverted at 0.63%. Class IA and IIA classifications were most prevalent at 27.30% and 23.49%, respectively, with Class IIIA being the least common at 1.58%. significantly higher surgical difficulty indicators seen in patients under 40 compared to older patients for right and left IMTMs (p = 0.026 and 0.011, respectively), but no statistically significant differences in these indicators were observed between genders or ethnicities. Conclusion: CBCT examination revealed that mesioangular impaction was the most frequent occurrence, followed by horizontal, vertical, distoangular, and inverted impactions. Class IA and IIA prevalent; Class IIIA least common. Surgical difficulty indication more in younger than 40 years old patients, no gender or ethnicity differences.","PeriodicalId":505319,"journal":{"name":"Ain Shams Dental Journal","volume":"92 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140405779","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}
Pub Date : 2024-03-01DOI: 10.21608/asdj.2023.216874.1180
Dalia Abd allah, mohamed Nagy, Tariq Yehia
Aim: The aim of this study was to compare the dynamic CFR of M3-ProGold instruments and Pepsi Gold instruments. Material and methods: Eighty files of size 25/.06 of M3 Pro Gold files and Pepsi Gold files (each n = 40) were evaluated for dynamic cyclic fatigue resistance inside two artificial stainless-steel canals with 2 different radii [(60̊ curvature, 3 and 5 mm curvature radii) at body temperature and immersed in distilled water at 37° ± 1°C. The NCF (number of cycles to failure) was documented. The data was analysed by the use of ANOVA and Tukey post hoc tests (P ≤ 0 .05). Results: The Pepsi Gold instruments had a significantly greater NCF than the M3 Pro Gold files in both canal radii at body temperature. Conclusion: Pepsi Gold instruments have higher CFR than M3 Pro Gold instruments.
{"title":"Comparison of Cyclic Fatigue Resistance of Two Different Rotary NiTi Instruments (An In-Vitro Study)","authors":"Dalia Abd allah, mohamed Nagy, Tariq Yehia","doi":"10.21608/asdj.2023.216874.1180","DOIUrl":"https://doi.org/10.21608/asdj.2023.216874.1180","url":null,"abstract":"Aim: The aim of this study was to compare the dynamic CFR of M3-ProGold instruments and Pepsi Gold instruments. Material and methods: Eighty files of size 25/.06 of M3 Pro Gold files and Pepsi Gold files (each n = 40) were evaluated for dynamic cyclic fatigue resistance inside two artificial stainless-steel canals with 2 different radii [(60̊ curvature, 3 and 5 mm curvature radii) at body temperature and immersed in distilled water at 37° ± 1°C. The NCF (number of cycles to failure) was documented. The data was analysed by the use of ANOVA and Tukey post hoc tests (P ≤ 0 .05). Results: The Pepsi Gold instruments had a significantly greater NCF than the M3 Pro Gold files in both canal radii at body temperature. Conclusion: Pepsi Gold instruments have higher CFR than M3 Pro Gold instruments.","PeriodicalId":505319,"journal":{"name":"Ain Shams Dental Journal","volume":"36 1‐2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140400746","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}
Pub Date : 2024-03-01DOI: 10.21608/asdj.2023.212496.1177
Amr Elhady, M. Obeid, Tariq Yehia
{"title":"Efficiency of different irrigation protocols on Cleanliness and disinfection of root canal (An In-vitro study)","authors":"Amr Elhady, M. Obeid, Tariq Yehia","doi":"10.21608/asdj.2023.212496.1177","DOIUrl":"https://doi.org/10.21608/asdj.2023.212496.1177","url":null,"abstract":"","PeriodicalId":505319,"journal":{"name":"Ain Shams Dental Journal","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140403375","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}
Pub Date : 2024-03-01DOI: 10.21608/asdj.2024.264791.1203
Mennat Allah Ramadan, Hanaa Zaghloul, Tamer Hamza
Aim: The study aims to assess the influence of hydrothermal aging on gradient zirconia's microstructure and color stability. Materials and methods: Ten discs were constructed from gradient zirconia blanks (3Y-TZP-5Y-TZP) using CADCAM technology. Hydrothermal aging was done in an autoclave. Color parameters (a*, b*, L*) for each disc was measured using a spectrophotometer. In order to investigate the zirconia specimens' crystalline structure, X-ray diffraction (XRD) was performed. Color stability and microstructural changes were examined before and after the aging process. Results: Following hydrothermal aging, a statistically significant decrease in the mean (L*) value was found. However, following hydrothermal aging, a statistically significant increase in the mean (a*) and (b*) values was reported. Regarding the microstructure, hydrothermal aging did not result in any significant changes. Conclusion: Artificial aging has led to color changes in gradient zirconia that were in the clinical acceptability range but has no impact on the microstructure of gradient zirconia.
{"title":"The Effect of Hydrothermal Aging on The Color Stability of Gradient Zirconia. In Vitro Study","authors":"Mennat Allah Ramadan, Hanaa Zaghloul, Tamer Hamza","doi":"10.21608/asdj.2024.264791.1203","DOIUrl":"https://doi.org/10.21608/asdj.2024.264791.1203","url":null,"abstract":"Aim: The study aims to assess the influence of hydrothermal aging on gradient zirconia's microstructure and color stability. Materials and methods: Ten discs were constructed from gradient zirconia blanks (3Y-TZP-5Y-TZP) using CADCAM technology. Hydrothermal aging was done in an autoclave. Color parameters (a*, b*, L*) for each disc was measured using a spectrophotometer. In order to investigate the zirconia specimens' crystalline structure, X-ray diffraction (XRD) was performed. Color stability and microstructural changes were examined before and after the aging process. Results: Following hydrothermal aging, a statistically significant decrease in the mean (L*) value was found. However, following hydrothermal aging, a statistically significant increase in the mean (a*) and (b*) values was reported. Regarding the microstructure, hydrothermal aging did not result in any significant changes. Conclusion: Artificial aging has led to color changes in gradient zirconia that were in the clinical acceptability range but has no impact on the microstructure of gradient zirconia.","PeriodicalId":505319,"journal":{"name":"Ain Shams Dental Journal","volume":"35 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140400750","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}
Pub Date : 2024-03-01DOI: 10.21608/asdj.2023.212937.1178
Noha Anany, Aya Samaha, Hanan Niazi
Aim: This study was conducted to evaluate the effect of different surface coating materials on flexural strength and surface roughness of two different glass ionomer restorative materials. Materials and Methods: 80 rectangular bars (12×2×2 mm) of glass ionomer materials; 40 highly viscous glass ionomer (HVGI) and 40 resin modified glass ionomer (RMGI) were prepared for flexure strength (FS) testing and divided into 4 groups (n=20) according to the applied surface coat; Group 0: no coat, Group 1: nano-filled resin coat, Group 3: total etch adhesive and Group 4: petroleum jelly. Another 80 cylindrical disks (6×2 mm) of the same materials were prepared for surface roughness (SR) testing and allocated to the same 4 groups as for FS testing (n=20). Samples were subjected to mechanical tooth brushing and then stored in distilled water at room temperature for either 24 hr. or 7 d. For FS testing, a 3-point loading test was performed using a universal testing machine running at a crosshead speed of 0.5 mm/min up to failure. For SR testing, mechanical profilometer was used with a cut-off value of 0.25mm. Statistical analysis was performed using One-Way ANOVA/ Turkey’s HSD post hoc test. Results: The results showed that the nano-filled resin coat exhibited the highest Statistically significant FS values and the lowest statistically significant SR values among all tested groups. Conclusions: Immediate surface coating enhances the flexure and roughness properties of HVGI and RMGI . The light cured nano-filled resin positively influences the FS and the SR of glass ionomers.
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