Fiber-based composite materials have gotten a lot of interest because of their strength, toughness, corrosion resistance, and lightweight.By functionally modifying the fiber components, fiber-based composite materials can preserve their original qualities while enhancing or overcoming the drawbacks of any single material.Composites constructed from modified fibers are highly suited for usage in a range of industries, including aerospace, high-rise construction, bridge and highway building, and maritime infrastructure, because of their excellent mechanical qualities, impact resistance, wear resistance, and fire resistance.Offering a solid scientific basis for the synthesis of fiber-based composites and their practical applications is the aim of this research.
{"title":"Fiber-Reinforced Composites in Operative Dentistry (A Literature Review)","authors":"Shahed Wissam Abdulamir, Manhal A. Majeed","doi":"10.25130/tjds.11.2.13","DOIUrl":"https://doi.org/10.25130/tjds.11.2.13","url":null,"abstract":"Fiber-based composite materials have gotten a lot of interest because of their strength, toughness, corrosion resistance, and lightweight.By functionally modifying the fiber components, fiber-based composite materials can preserve their original qualities while enhancing or overcoming the drawbacks of any single material.Composites constructed from modified fibers are highly suited for usage in a range of industries, including aerospace, high-rise construction, bridge and highway building, and maritime infrastructure, because of their excellent mechanical qualities, impact resistance, wear resistance, and fire resistance.Offering a solid scientific basis for the synthesis of fiber-based composites and their practical applications is the aim of this research.","PeriodicalId":512116,"journal":{"name":"Tikrit Journal for Dental Sciences","volume":"1 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139440267","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}
The goal of this research was to determine the surface hardness of heat cure acrylic resin reinforced with Nano Al2O3 after polishing with various materials. Materials and methods: - The 70 rectangular samples were made of a pink impact resistant thermoset acrylic (Vertex, Implacryl, The Netherlands) (65mm long x 10mm diameter x 3mm thick). Following polishing with each material (pumice stone, diamond suspension, colloidal silica), the surface roughness of each sample was determined using the Profilometer surface roughness instrument. The sample surface was glued to the profiler's horizontal base in a very flat position, and the stylus (the profiler's needle) was moved across each sample surface three times in three different directions over a distance of 1.7 mm. were separated into (7) groups were determined by the concentration of Nano powder, Group (A) Control without adding Nano filler of (Al2O3) (10) specimens, Group (B) Polishing with pumice Al2O3 (1%) (10) specimens, Group (C) Polishing with pumice Al2O3 (1.5 %) (10) specimens, Group (D) Polishing with Colloidal Al2O3 (1%) (10) specimens, Group (E) Polishing with Colloidal Al2O3 (1.5%) (10) specimens, Group (F) Polishing with Diamond Al2O3 (1%) (10) specimens, and Group (G) Polishing with Diamond Al2O3 (1.5%) (10) specimens. Data were statistically analyzed using statistical package for social science (SPSS), and the (ANOVA) test is used to determine whether the statistical hypothesis is true. Results: - For the hardness readings the higher mean value of hardness test found in group(D) (1%) polished by colloidal silica (82.74), then group (F)(1.5%)polished by colloidal(82.18), then group (F)(1%)polished by diamond( 81.12), then group(G)(1.5%)polished by diamond( 80.62),then group(C)(1.5%)polished with pumice(80.34),then group(B)(1%) polished with pumice(80.2),then at least group (A)control(80.18). Each of the three groups had a statistically significant difference with Highly sign. (P<0.01). Conclusions: -Specimens of acrylic reinforcement with adding 1.5% of Nano AL2O3 and polished with (colloidal silica, diamond suspension, and pumice, respectively) sequentially showed highly surface hardness then
{"title":"Evaluation of Surface Hardness of Heat Cure Acrylic Resin Reinforce by Nano Al2O3 After Polishing with Different Materials","authors":"Nihad Hassan M, Wafaa A.Jassem","doi":"10.25130/tjds.11.2.11","DOIUrl":"https://doi.org/10.25130/tjds.11.2.11","url":null,"abstract":"The goal of this research was to determine the surface hardness of heat cure acrylic resin reinforced with Nano Al2O3 after polishing with various materials. Materials and methods: - The 70 rectangular samples were made of a pink impact resistant thermoset acrylic (Vertex, Implacryl, The Netherlands) (65mm long x 10mm diameter x 3mm thick). Following polishing with each material (pumice stone, diamond suspension, colloidal silica), the surface roughness of each sample was determined using the Profilometer surface roughness instrument. The sample surface was glued to the profiler's horizontal base in a very flat position, and the stylus (the profiler's needle) was moved across each sample surface three times in three different directions over a distance of 1.7 mm. were separated into (7) groups were determined by the concentration of Nano powder, Group (A) Control without adding Nano filler of (Al2O3) (10) specimens, Group (B) Polishing with pumice Al2O3 (1%) (10) specimens, Group (C) Polishing with pumice Al2O3 (1.5 %) (10) specimens, Group (D) Polishing with Colloidal Al2O3 (1%) (10) specimens, Group (E) Polishing with Colloidal Al2O3 (1.5%) (10) specimens, Group (F) Polishing with Diamond Al2O3 (1%) (10) specimens, and Group (G) Polishing with Diamond Al2O3 (1.5%) (10) specimens. Data were statistically analyzed using statistical package for social science (SPSS), and the (ANOVA) test is used to determine whether the statistical hypothesis is true. Results: - For the hardness readings the higher mean value of hardness test found in group(D) (1%) polished by colloidal silica (82.74), then group (F)(1.5%)polished by colloidal(82.18), then group (F)(1%)polished by diamond( 81.12), then group(G)(1.5%)polished by diamond( 80.62),then group(C)(1.5%)polished with pumice(80.34),then group(B)(1%) polished with pumice(80.2),then at least group (A)control(80.18). Each of the three groups had a statistically significant difference with Highly sign. (P<0.01). Conclusions: -Specimens of acrylic reinforcement with adding 1.5% of Nano AL2O3 and polished with (colloidal silica, diamond suspension, and pumice, respectively) sequentially showed highly surface hardness then","PeriodicalId":512116,"journal":{"name":"Tikrit Journal for Dental Sciences","volume":"85 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139440699","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}
Mustafa Nabeel Al-Shakarchi, Radhwan Himmadi Hasan
One of the most promising CAD/CAM approaches is milling denture base materials from highly condensed pre-polymerized resin discs. In an effort to overcome the disadvantages of acrylic resin denture base materials, nano-filler materials have been added as well as denture base chemistry adjusted to strengthen the denture base.This eliminates disadvantages associated with polymerization shrinkage compared to conventional heat-cured acrylic resin. Aim of this study: evaluate the surface roughness of PMMA acrylic resin after strengthening the denture- base by addition of zinc oxide nano-filler material to acrylic resin PMMA with concentration (1%) and compare with milled CAD/CAM and non-modified heat-cured PMMA denture base materials. Materials and methods: thirty specimens of acrylic resin PMMA were prepared and divided into three groups 10 specimens for each groups as follows; Control Group (Group1) without ZnO nanoparticles ; Group (2) with (1%) by weight of ZnO nanoparticles ; Group (3) milled CAD/CAM.Each specimen is of dimension ( 10 x 10 x 3 ) in mm and was fabricated using conventional processing method and milling the CAD/CAM blocks .Results: showed the lowest mean value was recorded by milled CAD/CAM (0.230 Ra) Then the non-significant reduction with mean value (0.312 Ra) by PMMA+ ZnO 1% and highest mean value of surface roughness was recorded by pure PMMA without additive (0.327 Ra).Conclusions: There were significant differences between control group PMMA and milled (CAD/CAM) with slight reduction of surface roughness of PMMA with (1%) Zno nanoparticles.
{"title":"Comparative Evaluation to Surface Roughness of Modified Heat Cured Acrylic Resin by Zinc Oxide Nanoparticles and CAD/CAM Denture Base Materials - In Vitro Study","authors":"Mustafa Nabeel Al-Shakarchi, Radhwan Himmadi Hasan","doi":"10.25130/tjds.11.2.2","DOIUrl":"https://doi.org/10.25130/tjds.11.2.2","url":null,"abstract":"One of the most promising CAD/CAM approaches is milling denture base materials from highly condensed pre-polymerized resin discs. In an effort to overcome the disadvantages of acrylic resin denture base materials, nano-filler materials have been added as well as denture base chemistry adjusted to strengthen the denture base.This eliminates disadvantages associated with polymerization shrinkage compared to conventional heat-cured acrylic resin. Aim of this study: evaluate the surface roughness of PMMA acrylic resin after strengthening the denture- base by addition of zinc oxide nano-filler material to acrylic resin PMMA with concentration (1%) and compare with milled CAD/CAM and non-modified heat-cured PMMA denture base materials. Materials and methods: thirty specimens of acrylic resin PMMA were prepared and divided into three groups 10 specimens for each groups as follows; Control Group (Group1) without ZnO nanoparticles ; Group (2) with (1%) by weight of ZnO nanoparticles ; Group (3) milled CAD/CAM.Each specimen is of dimension ( 10 x 10 x 3 ) in mm and was fabricated using conventional processing method and milling the CAD/CAM blocks .Results: showed the lowest mean value was recorded by milled CAD/CAM (0.230 Ra) Then the non-significant reduction with mean value (0.312 Ra) by PMMA+ ZnO 1% and highest mean value of surface roughness was recorded by pure PMMA without additive (0.327 Ra).Conclusions: There were significant differences between control group PMMA and milled (CAD/CAM) with slight reduction of surface roughness of PMMA with (1%) Zno nanoparticles.","PeriodicalId":512116,"journal":{"name":"Tikrit Journal for Dental Sciences","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139439415","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}
Mahmood Rafea Yahya Al-Mallah, Sarmad Sobhi Salih Al Qassar, Omer Khalid M.
Mastication is a chewing route, that implicates a group of muscles that are responsible for moving the mandible condyle in the temporomandibular joint (TMJ) to chore food between the teeth in the maxillary and mandibular arches (1) .Regarding the growth of the craniofacial system (CFS),there are an agreement which is strongminded via genetic and ecological aspects (2) . Masticatory forces considered as one of the chief environmental incentives that produce craniofacial difference amongst modern humans. New researeches on a broad variety of creatures, counting those having retro-gnathic post canine teeth, expect that retorts to the force of mastication that determined the superior in the occlusal plane (3) . The effect of masticatory stroke induced by the muscles of the mastication on the development of the morphology of craniofacial portion, has established significant attention in the recent oral invistigations (4) . Meanwhile the skeletal of the CFS adapts to the applied loads by bone remodeling in order to get the optimum formula to resist loads according to Wollf ’s law (5) . CFS has been assumed that it formula is mainly resolute by loading induced by mucsles of mastication. This has been reinforced by numerous clinical and experimental readings (6-9) . Investigational studies displayed that the reduced stresses induced by function on the animals mandibles, whose nourished a lenient diet outcomes in organizational variations in their masticatory systems (10) , in addition to morphological modifications of the lower jaw, like diminished of the alveolar bone size (11, 12) .Diet could be considered as a element of masticatory magnitude. Recent humans in developed countries eat an additional treated and softer diet rather than old humans. The change from hard to soft nourishment has been join by reduce in mandibular dimension and the growth of the alveolar bone, along with enlarged occurrence of malocclusion (1,5,7).
{"title":"The Effect of Diet Consistency on the Craniofacial Morphology: A review Article.","authors":"Mahmood Rafea Yahya Al-Mallah, Sarmad Sobhi Salih Al Qassar, Omer Khalid M.","doi":"10.25130/tjds.11.2.20","DOIUrl":"https://doi.org/10.25130/tjds.11.2.20","url":null,"abstract":"Mastication is a chewing route, that implicates a group of muscles that are responsible for moving the mandible condyle in the temporomandibular joint (TMJ) to chore food between the teeth in the maxillary and mandibular arches (1) .Regarding the growth of the craniofacial system (CFS),there are an agreement which is strongminded via genetic and ecological aspects (2) . Masticatory forces considered as one of the chief environmental incentives that produce craniofacial difference amongst modern humans. New researeches on a broad variety of creatures, counting those having retro-gnathic post canine teeth, expect that retorts to the force of mastication that determined the superior in the occlusal plane (3) . The effect of masticatory stroke induced by the muscles of the mastication on the development of the morphology of craniofacial portion, has established significant attention in the recent oral invistigations (4) . Meanwhile the skeletal of the CFS adapts to the applied loads by bone remodeling in order to get the optimum formula to resist loads according to Wollf ’s law (5) . CFS has been assumed that it formula is mainly resolute by loading induced by mucsles of mastication. This has been reinforced by numerous clinical and experimental readings (6-9) . Investigational studies displayed that the reduced stresses induced by function on the animals mandibles, whose nourished a lenient diet outcomes in organizational variations in their masticatory systems (10) , in addition to morphological modifications of the lower jaw, like diminished of the alveolar bone size (11, 12) .Diet could be considered as a element of masticatory magnitude. Recent humans in developed countries eat an additional treated and softer diet rather than old humans. The change from hard to soft nourishment has been join by reduce in mandibular dimension and the growth of the alveolar bone, along with enlarged occurrence of malocclusion (1,5,7).","PeriodicalId":512116,"journal":{"name":"Tikrit Journal for Dental Sciences","volume":"91 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139440301","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}
The effectiveness of fluoride-releasing materials in preventing caries is proportional to the concentration and duration of the fluoride ions they release. The goal of this study was to evaluate the fluoride ion release of two alkasite materials; Cention Forte and Cention-N in comparison to Glass Ionomer Cement (GIC) R iva at two time intervals (24 hours and 7 days) when they are bonded and non-bonded to tooth structures. Methodology: 72 samples were fabricated from the three types of fluoride releasing materials. 36 samples were bonded to teeth specimens (three bonded groups) and another 36 samples were constructed within a silicon mould (three non-bonded groups), each group consisted of 12 samples. The bonded groups were: BCF using Cention Forte, BCN using Cention N and BGI using GIC Riva. The non-bonded groups were: NBCF using Cention Forte, NBCN using Cention N and NBGI using GIC Riva. 5ml of deionized water was used as the storage medi a for all the samples. Fluoride ions measurements were performed by fluoride ion selective electrode at two time intervals; after 24 hours (immediate) and after 7 days (delayed) for all the groups. The mean values of the data were analyzed statistically using one-way ANOVA, Post hoc Tukey's HSD test and paired t-test at p≤0.05. Results: For both bonded and non-bonded groups, at 24h the initial fluoride release of GIC Riva was significantly higher (p=0.00) than both Alkasite groups. While after 7 days, the highest amount of fluoride ion release was recorded for BCF with significant difference with BCN (p=0.016) and BGI (p=0.006), respecti vely. Similarly, NBCF released significantly higher amount of fluoride ions than NBCN and NBGI (p=0.00). The results of paired t-test showed that the mean values of fl uoride ions release was significantly increased from the first 24 to 7 days for all the groups (p≤0.05). Conclusion : The immediate fluoride ions release was highest from GIC Riva. While the delayed fluoride ions release was highest from both Alkasite filling materials for both the bonded and non-bonded groups.
{"title":"Evaluation of Immediate and Delayed Fluoride Release of Alkasite Filling Materials with and without Bonding to Tooth Structure","authors":"Hussein A. Mohammed, Manal H. Abd-alla","doi":"10.25130/tjds.11.2.10","DOIUrl":"https://doi.org/10.25130/tjds.11.2.10","url":null,"abstract":"The effectiveness of fluoride-releasing materials in preventing caries is proportional to the concentration and duration of the fluoride ions they release. The goal of this study was to evaluate the fluoride ion release of two alkasite materials; Cention Forte and Cention-N in comparison to Glass Ionomer Cement (GIC) R iva at two time intervals (24 hours and 7 days) when they are bonded and non-bonded to tooth structures. Methodology: 72 samples were fabricated from the three types of fluoride releasing materials. 36 samples were bonded to teeth specimens (three bonded groups) and another 36 samples were constructed within a silicon mould (three non-bonded groups), each group consisted of 12 samples. The bonded groups were: BCF using Cention Forte, BCN using Cention N and BGI using GIC Riva. The non-bonded groups were: NBCF using Cention Forte, NBCN using Cention N and NBGI using GIC Riva. 5ml of deionized water was used as the storage medi a for all the samples. Fluoride ions measurements were performed by fluoride ion selective electrode at two time intervals; after 24 hours (immediate) and after 7 days (delayed) for all the groups. The mean values of the data were analyzed statistically using one-way ANOVA, Post hoc Tukey's HSD test and paired t-test at p≤0.05. Results: For both bonded and non-bonded groups, at 24h the initial fluoride release of GIC Riva was significantly higher (p=0.00) than both Alkasite groups. While after 7 days, the highest amount of fluoride ion release was recorded for BCF with significant difference with BCN (p=0.016) and BGI (p=0.006), respecti vely. Similarly, NBCF released significantly higher amount of fluoride ions than NBCN and NBGI (p=0.00). The results of paired t-test showed that the mean values of fl uoride ions release was significantly increased from the first 24 to 7 days for all the groups (p≤0.05). Conclusion : The immediate fluoride ions release was highest from GIC Riva. While the delayed fluoride ions release was highest from both Alkasite filling materials for both the bonded and non-bonded groups.","PeriodicalId":512116,"journal":{"name":"Tikrit Journal for Dental Sciences","volume":"72 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139440620","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}
Sarmad Sobhi Salih Al Qassar, Mahmood Rafea Yahya Al-Mallah, Mahmood Khalid Ahmed
At the beginning of orthodontic practice, with fixed appliances, the multi-banding technique of the teeth was used, which had aesthetic disadvantages and often provoked aggression to the gingival tissues. To overcome these unfavorable characteristics, developing the technique of direct bonding of brackets brings the advantages of reducing the cost and time during the treatment and make easier cleaning. The advent of using acid etching in a dental practice which was introduced by Buonocore (Error! Reference source not found.) in 1955, enabling bonding between bracket base and enamel of the teeth. This adhesion had a high impact on esthetic and conservative orthodontics. The advantages of such a direct bonding technique to the tooth surface are reduced the cost and time of overall orthodontic treatment. Additionally, it makes the oral hygiene for the patients more simple and easy. The aims of this paper is to conduct a review of formerly published articles that are dealing with the orthodontic bonding to teeth enamel. It was confirmed that composites resin (CR) beside glass ionomer cement (GIC) are suitable material for such bonding. This could be because of its GIC biocompatibility, fluoride-releasing capacity, as well as lack of acid etching on the tooth surface. In another hand, resin-modified glass ionomer (RMGI) has grown in acceptance among orthodontists. Light polymerized orthodontic adhesives, on the other hand, remain the best adhesives for bracket bonding due to their esthetic and mechanical features, and their use is widespread (Error! Reference source not found., Error! Reference source not found.). In 1958, Sadler (2) recorded the first attempt at direct bonding of orthodontic accessories to the tooth surface. Since the 1960s, studies have been made for improving the procedure in such a way that success in this practice is guaranteed and the use of metallic brackets, directly bonded to enamel. The introduction of acid etching that was presented by Buonocore (Error! Reference source not found.) in 1955 carried out the opportunity of bonding the base of the bracket with the enamel surfaces and create mechanical retentions in the teeth. Thus, from the 1970s onwards, composite
{"title":"Teeth Bracket Adhesives: Clinical Considerations: A Review Article","authors":"Sarmad Sobhi Salih Al Qassar, Mahmood Rafea Yahya Al-Mallah, Mahmood Khalid Ahmed","doi":"10.25130/tjds.11.2.19","DOIUrl":"https://doi.org/10.25130/tjds.11.2.19","url":null,"abstract":"At the beginning of orthodontic practice, with fixed appliances, the multi-banding technique of the teeth was used, which had aesthetic disadvantages and often provoked aggression to the gingival tissues. To overcome these unfavorable characteristics, developing the technique of direct bonding of brackets brings the advantages of reducing the cost and time during the treatment and make easier cleaning. The advent of using acid etching in a dental practice which was introduced by Buonocore (Error! Reference source not found.) in 1955, enabling bonding between bracket base and enamel of the teeth. This adhesion had a high impact on esthetic and conservative orthodontics. The advantages of such a direct bonding technique to the tooth surface are reduced the cost and time of overall orthodontic treatment. Additionally, it makes the oral hygiene for the patients more simple and easy. The aims of this paper is to conduct a review of formerly published articles that are dealing with the orthodontic bonding to teeth enamel. It was confirmed that composites resin (CR) beside glass ionomer cement (GIC) are suitable material for such bonding. This could be because of its GIC biocompatibility, fluoride-releasing capacity, as well as lack of acid etching on the tooth surface. In another hand, resin-modified glass ionomer (RMGI) has grown in acceptance among orthodontists. Light polymerized orthodontic adhesives, on the other hand, remain the best adhesives for bracket bonding due to their esthetic and mechanical features, and their use is widespread (Error! Reference source not found., Error! Reference source not found.). In 1958, Sadler (2) recorded the first attempt at direct bonding of orthodontic accessories to the tooth surface. Since the 1960s, studies have been made for improving the procedure in such a way that success in this practice is guaranteed and the use of metallic brackets, directly bonded to enamel. The introduction of acid etching that was presented by Buonocore (Error! Reference source not found.) in 1955 carried out the opportunity of bonding the base of the bracket with the enamel surfaces and create mechanical retentions in the teeth. Thus, from the 1970s onwards, composite","PeriodicalId":512116,"journal":{"name":"Tikrit Journal for Dental Sciences","volume":"83 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139440384","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}
The purpose of present study is to evaluate and comparison the effect of different milling technique surface of CAD/CAM for milled Co-Cr alloy specimens.Material and Methods: The diagnostic divides 20 disc-shaped specimens into 2 main groups, each consisting of 10 specimens for Co/Cr alloys according to their construction, the material used in hard milling and soft milling. All samples for further examination were prepared as drilled discs (diameter 15 mm, height 3 mm) whose surfaces were then finished and polishing with a diamond polisher. Scanning electron microscopy (SEM) images with energy-dispersive beam spectroscopy (EDS) were acquired for one sample in each set to assess the surface topography of the metal framework. All samples were degreased, and steam cleaned samples and heat treated in accordance with the complete firing procedure. Then scanning electron microscopy (SEM) after heating. Samples prepared in the lab for electrochemical corrosion testing were polarized and corroded in accordance with their electrical potential. Results were recorded using Levenes test and anova, with appropriate data analyzed for differences between groups. Results: The results of this study presented that the Descriptive statistics for corrosion test (mmpy) for all experimental groups revealed that the hard milling group mean was the lowest among all groups of the study is recorded (0005), followed, Group soft milling (.0071). The data were statistically analyzed using Welch’s ANOVA and Levene’s test which revealed highly significant differences (p<0.01) among groups. Conclusion: Corrosion resistance decreases in the following order: soft metal milling > hard metal milling, according to the obtained corrosion parameter values.
{"title":"Evaluation the Effect of Heat Treatment on Corrosion Resistance of Cobalt Chromium Alloys","authors":"Evan H. Alwan, Sabiha M. Kanaan","doi":"10.25130/tjds.11.2.12","DOIUrl":"https://doi.org/10.25130/tjds.11.2.12","url":null,"abstract":"The purpose of present study is to evaluate and comparison the effect of different milling technique surface of CAD/CAM for milled Co-Cr alloy specimens.Material and Methods: The diagnostic divides 20 disc-shaped specimens into 2 main groups, each consisting of 10 specimens for Co/Cr alloys according to their construction, the material used in hard milling and soft milling. All samples for further examination were prepared as drilled discs (diameter 15 mm, height 3 mm) whose surfaces were then finished and polishing with a diamond polisher. Scanning electron microscopy (SEM) images with energy-dispersive beam spectroscopy (EDS) were acquired for one sample in each set to assess the surface topography of the metal framework. All samples were degreased, and steam cleaned samples and heat treated in accordance with the complete firing procedure. Then scanning electron microscopy (SEM) after heating. Samples prepared in the lab for electrochemical corrosion testing were polarized and corroded in accordance with their electrical potential. Results were recorded using Levenes test and anova, with appropriate data analyzed for differences between groups. Results: The results of this study presented that the Descriptive statistics for corrosion test (mmpy) for all experimental groups revealed that the hard milling group mean was the lowest among all groups of the study is recorded (0005), followed, Group soft milling (.0071). The data were statistically analyzed using Welch’s ANOVA and Levene’s test which revealed highly significant differences (p<0.01) among groups. Conclusion: Corrosion resistance decreases in the following order: soft metal milling > hard metal milling, according to the obtained corrosion parameter values.","PeriodicalId":512116,"journal":{"name":"Tikrit Journal for Dental Sciences","volume":"74 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139440477","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}
Background: Rec urrent aphthous stomatitis (RAS) is one of the most widespread disorders affecting the oral mucosa, with a prevalence of 50–66%. This study investigated the serum and salivary levels of ferritin between participants with recurrent aphthous ulcers and healthy. Methods: A total of 75 individuals participated in the research separated into three groups, clinically healthy control group (n=25), iron deficiency anemi c patient with recurrent aphthous stomatitis (n=25), and iron deficiency anemic patient without recurrent aphthous stomatitis (n=25). The enzyme-linked immunosorbent assay measured the serum and salivary ferritin levels. Result: the serum and salivary levels of ferritin were significantly lower (p<0.05) in anemic groups compared to healthy controls.in the salivary ferritin, there was a statistically significant difference between anemic patients without aphthous ulcer and anemic with aphthous ulcer (p=0.015), while in the serum ferritin, there was non-significant difference. Conclusion: The severity of ferritin deficiency paly as a cofactor for the development and recurrence of recurrent aphthous stomatitis.
{"title":"Serum and Salivary Ferritin Level in Relation to Iron Deficiency Patient with Recurrent Aphthous Stomatitis","authors":"Ghaith Majid Al-Hamdani, Layla Sabri Yas","doi":"10.25130/tjds.11.2.16","DOIUrl":"https://doi.org/10.25130/tjds.11.2.16","url":null,"abstract":"Background: Rec urrent aphthous stomatitis (RAS) is one of the most widespread disorders affecting the oral mucosa, with a prevalence of 50–66%. This study investigated the serum and salivary levels of ferritin between participants with recurrent aphthous ulcers and healthy. Methods: A total of 75 individuals participated in the research separated into three groups, clinically healthy control group (n=25), iron deficiency anemi c patient with recurrent aphthous stomatitis (n=25), and iron deficiency anemic patient without recurrent aphthous stomatitis (n=25). The enzyme-linked immunosorbent assay measured the serum and salivary ferritin levels. Result: the serum and salivary levels of ferritin were significantly lower (p<0.05) in anemic groups compared to healthy controls.in the salivary ferritin, there was a statistically significant difference between anemic patients without aphthous ulcer and anemic with aphthous ulcer (p=0.015), while in the serum ferritin, there was non-significant difference. Conclusion: The severity of ferritin deficiency paly as a cofactor for the development and recurrence of recurrent aphthous stomatitis.","PeriodicalId":512116,"journal":{"name":"Tikrit Journal for Dental Sciences","volume":"84 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139440753","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}
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