Pub Date : 2019-06-01DOI: 10.26477/IDJ.V41I1.177.G137
Ekaniyere Benlance, B. Saheeb
Oro-antral perforation (OAP) could be misdiagnosed if the incidence and risk factors are unknown and its consequence could be worrisome. We aimed to determine the incidence and risk factors of oro-antral perforations after teeth extraction. A retrospective study of forceps extracted upper posterior teeth over a ten-year period from September 2008 to November 2018 was done at our hospital in Nigeria. In univariate analysis, the predictors were age, gender, experience of surgeon, site of tooth, side of surgery, use of elevators while the outcome variable was oroantral perforations. Logistic regression was also done to determine the risk factors associated OAP. We used SPSS Version 17(SPSS Inc, Chicago, USA) to perform descriptive and inferential statistical analysis. P-Value less than 0.05 was considered statistically significant. Out of the total 26,372 dental extractions during the ten-year period, 54 (0.2%) extraction cases (33 males, 21 females) had oro-antral perforations. Their mean age was 54.8± 10.6years (ranging from 21 to78 years). The highest incidence occurred in the sixth decade of life. Only the location of teeth had a significant association with oro-antral perforations. The location of upper first molar was (OR = 1.85, P=0.00) identified as a significant risk factor. The incidence of OAP is significantly lower in Nigerians and was 0.2% although there could be a population variability. The position of the upper first molar was a factor found to be associated and predictive of the OAP but age, gender, number of extractions per visit, side of operation and the surgeon’s experience were not. The findings will help surgeons to predict occurrence of OAP knowing its risk factors.
{"title":"Incidence and risk factors of oroantral perforation following tooth ex- traction among Nigerian population in a tertiary hospital: a ten- year retrospective study","authors":"Ekaniyere Benlance, B. Saheeb","doi":"10.26477/IDJ.V41I1.177.G137","DOIUrl":"https://doi.org/10.26477/IDJ.V41I1.177.G137","url":null,"abstract":"Oro-antral perforation (OAP) could be misdiagnosed if the incidence and risk factors are unknown and its consequence could be worrisome. We aimed to determine the incidence and risk factors of oro-antral perforations after teeth extraction. A retrospective study of forceps extracted upper posterior teeth over a ten-year period from September 2008 to November 2018 was done at our hospital in Nigeria. In univariate analysis, the predictors were age, gender, experience of surgeon, site of tooth, side of surgery, use of elevators while the outcome variable was oroantral perforations. Logistic regression was also done to determine the risk factors associated OAP. We used SPSS Version 17(SPSS Inc, Chicago, USA) to perform descriptive and inferential statistical analysis. P-Value less than 0.05 was considered statistically significant. Out of the total 26,372 dental extractions during the ten-year period, 54 (0.2%) extraction cases (33 males, 21 females) had oro-antral perforations. Their mean age was 54.8± 10.6years (ranging from 21 to78 years). The highest incidence occurred in the sixth decade of life. Only the location of teeth had a significant association with oro-antral perforations. The location of upper first molar was (OR = 1.85, P=0.00) identified as a significant risk factor. The incidence of OAP is significantly lower in Nigerians and was 0.2% although there could be a population variability. The position of the upper first molar was a factor found to be associated and predictive of the OAP but age, gender, number of extractions per visit, side of operation and the surgeon’s experience were not. The findings will help surgeons to predict occurrence of OAP knowing its risk factors.","PeriodicalId":78326,"journal":{"name":"Iraqi Dental Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84367692","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}
In our modest point of view "research is not a paper published to increase the biography of an academic, nor a tool for getting fund, promotion and job. Research adds a great value to the society's life and can change the world; besides its reflection on a long-lasting impression of an academic, being his/her surviving wealth". To preserve science and society all over the world, we should ban fake research, fake journals and publishers. Finally, selecting prestigious journals for publishing scientific research is an issue of honesty.
{"title":"Publications in Fake and Predatory Journals Harm Academic Reputation of Higher Education Institutions","authors":"M. J. Alduliamy","doi":"10.26477/idj.v41i1.189","DOIUrl":"https://doi.org/10.26477/idj.v41i1.189","url":null,"abstract":"In our modest point of view \"research is not a paper published to increase the biography of an academic, nor a tool for getting fund, promotion and job. Research adds a great value to the society's life and can change the world; besides its reflection on a long-lasting impression of an academic, being his/her surviving wealth\". To preserve science and society all over the world, we should ban fake research, fake journals and publishers. Finally, selecting prestigious journals for publishing scientific research is an issue of honesty.","PeriodicalId":78326,"journal":{"name":"Iraqi Dental Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89444767","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: During the course of fixed orthodontic therapy, it is difficult to maintain high standard oral hygiene care by mechanical tooth cleaning only. Therefore, mouthwashes are commonly used as adjunct for mechanical tooth cleaning. Most of the mouthwashes are chemicals and have a wide range of side effects. Plant extracts have stood the test of time as safe inexpensive and available remedy for providing general health care. Objective: The present study attempted to evaluate the efficacy of gargling with aqueous extract of Dandelion (Taraxacum officinale) on the oral hygiene status of patients wearing fixed orthodontic appliances. Methods: Eleven male patients undergoing orthodontic treatment with fixed appliances were recruited in the study. All patients were given the same oral hygiene regimen during the study period. Clinical evaluation of OPI (orthodontic plaque index) and salivary streptococcus mutans count were recorded at the first activation visit (three weeks after placement of the orthodontic appliances) which considered the baseline visit and after one week of gargling with the extract. The data were statistically analyzed with SPSS (version 21) using Paired Samples t-test. Result: The results of the statistical analysis revealed that, there were highly significant reductions in both OPI and salivary streptococcus mutans count after one week gargling with aqueous extract of Dandelion (Taraxacum officinale). Conclusion: The present finding concluded that, aqueous extract of Dandelion (Taraxacum officinale) could be use as a promising ingredient in manufacturing mouthwashs and other dental supplies that contribute in maintaining good oral hygiene during the course of orthodontic treatment with fixed appliances.
{"title":"The Effect of Gargling with Aqueous Extract of Dandelion (Taraxacum officinale) on the Oral Hygiene Status of Patients Wearing Fixed Orthodontic Appliance: A Clinical Study","authors":"M. J. Alduliamy","doi":"10.26477/idj.v40i1.135","DOIUrl":"https://doi.org/10.26477/idj.v40i1.135","url":null,"abstract":"Background: During the course of fixed orthodontic therapy, it is difficult to maintain high standard oral hygiene care by mechanical tooth cleaning only. Therefore, mouthwashes are commonly used as adjunct for mechanical tooth cleaning. Most of the mouthwashes are chemicals and have a wide range of side effects. Plant extracts have stood the test of time as safe inexpensive and available remedy for providing general health care. Objective: The present study attempted to evaluate the efficacy of gargling with aqueous extract of Dandelion (Taraxacum officinale) on the oral hygiene status of patients wearing fixed orthodontic appliances. Methods: Eleven male patients undergoing orthodontic treatment with fixed appliances were recruited in the study. All patients were given the same oral hygiene regimen during the study period. Clinical evaluation of OPI (orthodontic plaque index) and salivary streptococcus mutans count were recorded at the first activation visit (three weeks after placement of the orthodontic appliances) which considered the baseline visit and after one week of gargling with the extract. The data were statistically analyzed with SPSS (version 21) using Paired Samples t-test. Result: The results of the statistical analysis revealed that, there were highly significant reductions in both OPI and salivary streptococcus mutans count after one week gargling with aqueous extract of Dandelion (Taraxacum officinale). Conclusion: The present finding concluded that, aqueous extract of Dandelion (Taraxacum officinale) could be use as a promising ingredient in manufacturing mouthwashs and other dental supplies that contribute in maintaining good oral hygiene during the course of orthodontic treatment with fixed appliances.","PeriodicalId":78326,"journal":{"name":"Iraqi Dental Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88427730","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 : 2018-08-01DOI: 10.26477/IDJ.V40I1.137.G95
Firas Abd Kati
Introduction: Clear acrylic resins are widely used in many applications in the field of dentistry such as removable complete and partial dentures. such materials are also used in the fabrication of scleral part of ocular prostheses when mixed with white oil paints. Therefore, the purpose of the present study was to evaluate the addition of oil paints on translucency of clear acrylic material. Materials and methods: The study included three main groups. Each group consists of 10 specimens. The concentration of white oil paints has increased from 1 ml to 2 ml, respectively. The translucency test was applied on all specimens. Results: The results showed that there was a significant decrease in translucency of acrylic following addition of white oil paints. Conclusion: the use of white paints has decreased the translucency of acrylic material. The adding of white oil paint at 1 ml to clear acrylic resin is necessary in the manufacture of the scleral part of ocular prostheses to match the colour of natural eye.
{"title":"Translucency of clear acrylic resin influenced by oil paints","authors":"Firas Abd Kati","doi":"10.26477/IDJ.V40I1.137.G95","DOIUrl":"https://doi.org/10.26477/IDJ.V40I1.137.G95","url":null,"abstract":"Introduction: Clear acrylic resins are widely used in many applications in the field of dentistry such as removable complete and partial dentures. such materials are also used in the fabrication of scleral part of ocular prostheses when mixed with white oil paints. Therefore, the purpose of the present study was to evaluate the addition of oil paints on translucency of clear acrylic material. Materials and methods: The study included three main groups. Each group consists of 10 specimens. The concentration of white oil paints has increased from 1 ml to 2 ml, respectively. The translucency test was applied on all specimens. Results: The results showed that there was a significant decrease in translucency of acrylic following addition of white oil paints. Conclusion: the use of white paints has decreased the translucency of acrylic material. The adding of white oil paint at 1 ml to clear acrylic resin is necessary in the manufacture of the scleral part of ocular prostheses to match the colour of natural eye.","PeriodicalId":78326,"journal":{"name":"Iraqi Dental Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88175562","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: Recurrent aphthous stomatitis (RAS) is a global oral case that stay incompletely understood yet. It was classified into three main types of minor, major or herpetiform, based on clinical features, but the exact causative agent is unknown, therefore treatments are primarily should be experimental and aimed at decrease symptoms rather than remedy or prevention. The aim of study is to detection of Herpes simplex virus-1 and Herpes simplex virus-2 in saliva of patients with recurrent aphthous stomatitis (RAS) as a causative agents of the disease by the enzyme-linked immunosorbent assay (ELISA) assay, and correlation between positive results and finding of age, gender, and family history. Materials and Methods: Study group of (40) saliva samples were taken from 40 patients with RAS lesions included 15 male and 25 female, with mean age at (34) years, at range about (18-55) years , and healthy control group were (20) healthy volunteers were suffered from oral traumatic ulcers, consist women (13), men (7), mean age (33) years in range (18-55). for detection of HSV viruses types that may causes this disease, and healthy control group were (20) healthy volunteers were suffered from oral traumatic ulcers, ELISA method used for diagnosis HSV-1 and HSV-2, from saliva samples of the patients with (RAS) with correlation between positive results and finding of age, gender, and family history. Results: Diagnostic specimens were consisted of two groups, study group of (40) saliva samples taken from 40 patients with RAS lesions. The results of ELISA to detect HSV had high significant (17): 42.5% from (40) patients with (RAS), HSV-1: (13)32.5%, and HSV-2: (4)10%. Conclusion: This high number of RAS cases by HSV, and presence of HSV-2 in patients saliva in this study acted important cause of prevalence of this disease in Iraq, were in age group (18-25) mostly in female especially in those with family history of infection. Keywords: Recurrent Aphthous Stomatitis (RAS), Aphthous ulcer, HSV-1&2 viruses, ELISA method
{"title":"Detection of HSV1 and HSV2 viruses among Iraqi patients with recurrent Stomatitis Aphthous","authors":"E. A. Al-Hasnawi","doi":"10.26477/idj.v40i1.134","DOIUrl":"https://doi.org/10.26477/idj.v40i1.134","url":null,"abstract":"Background: Recurrent aphthous stomatitis (RAS) is a global oral case that stay incompletely understood yet. It was classified into three main types of minor, major or herpetiform, based on clinical features, but the exact causative agent is unknown, therefore treatments are primarily should be experimental and aimed at decrease symptoms rather than remedy or prevention. The aim of study is to detection of Herpes simplex virus-1 and Herpes simplex virus-2 in saliva of patients with recurrent aphthous stomatitis (RAS) as a causative agents of the disease by the enzyme-linked immunosorbent assay (ELISA) assay, and correlation between positive results and finding of age, gender, and family history.\u0000Materials and Methods: Study group of (40) saliva samples were taken from 40 patients with RAS lesions included 15 male and 25 female, with mean age at (34) years, at range about (18-55) years , and healthy control group were (20) healthy volunteers were suffered from oral traumatic ulcers, consist women (13), men (7), mean age (33) years in range (18-55). for detection of HSV viruses types that may causes this disease, and healthy control group were (20) healthy volunteers were suffered from oral traumatic ulcers, ELISA method used for diagnosis HSV-1 and HSV-2, from saliva samples of the patients with (RAS) with correlation between positive results and finding of age, gender, and family history.\u0000Results: Diagnostic specimens were consisted of two groups, study group of (40) saliva samples taken from 40 patients with RAS lesions. The results of ELISA to detect HSV had high significant (17): 42.5% from (40) patients with (RAS), HSV-1: (13)32.5%, and HSV-2: (4)10%.\u0000Conclusion: This high number of RAS cases by HSV, and presence of HSV-2 in patients saliva in this study acted important cause of prevalence of this disease in Iraq, were in age group (18-25) mostly in female especially in those with family history of infection.\u0000Keywords: Recurrent Aphthous Stomatitis (RAS), Aphthous ulcer, HSV-1&2 viruses, ELISA method","PeriodicalId":78326,"journal":{"name":"Iraqi Dental Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73390270","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: During the course of fixed orthodontic therapy, it is difficult to maintain high standard oral hygiene care by mechanical tooth cleaning only. Therefore, mouthwashes are commonly used as adjunct for mechanical tooth cleaning. Most of the mouthwashes are chemicals and have a wide range of side effects. Plant extracts have stood the test of time as safe inexpensive and available remedy for providing general health care. Objective: The present study attempted to evaluate the efficacy of gargling with aqueous extract of Dandelion (Taraxacum officinale) on the oral hygiene status of patients wearing fixed orthodontic appliances. Methods: Eleven male patients undergoing orthodontic treatment with fixed appliances were recruited in the study. All patients were given the same oral hygiene regimen during the study period. Clinical evaluation of OPI (orthodontic plaque index) and salivary streptococcus mutans count were recorded at the first activation visit (three weeks after placement of the orthodontic appliances) which considered the baseline visit and after one week of gargling with the extract. The data were statistically analyzed with SPSS (version 21) using Paired Samples t-test. Result: The results of the statistical analysis revealed that, there were highly significant reductions in both OPI and salivary streptococcus mutans count after one week gargling with aqueous extract of Dandelion (Taraxacum officinale). Conclusion: The present finding concluded that, aqueous extract of Dandelion (Taraxacum officinale) could be use as a promising ingredient in manufacturing mouthwashs and other dental supplies that contribute in maintaining good oral hygiene during the course of orthodontic treatment with fixed appliances.
{"title":"The Effect of Gargling with Aqueous Extract of Dandelion (Taraxacum officinale) on the Oral Hygiene Status of Patients Wearing Fixed Orthodontic Appliance: A Clinical Study","authors":"M. J. Al duliamy","doi":"10.46466/idj.v40i1.135","DOIUrl":"https://doi.org/10.46466/idj.v40i1.135","url":null,"abstract":"Background: During the course of fixed orthodontic therapy, it is difficult to maintain high standard oral hygiene care by mechanical tooth cleaning only. Therefore, mouthwashes are commonly used as adjunct for mechanical tooth cleaning. Most of the mouthwashes are chemicals and have a wide range of side effects. Plant extracts have stood the test of time as safe inexpensive and available remedy for providing general health care. Objective: The present study attempted to evaluate the efficacy of gargling with aqueous extract of Dandelion (Taraxacum officinale) on the oral hygiene status of patients wearing fixed orthodontic appliances. Methods: Eleven male patients undergoing orthodontic treatment with fixed appliances were recruited in the study. All patients were given the same oral hygiene regimen during the study period. Clinical evaluation of OPI (orthodontic plaque index) and salivary streptococcus mutans count were recorded at the first activation visit (three weeks after placement of the orthodontic appliances) which considered the baseline visit and after one week of gargling with the extract. The data were statistically analyzed with SPSS (version 21) using Paired Samples t-test. Result: The results of the statistical analysis revealed that, there were highly significant reductions in both OPI and salivary streptococcus mutans count after one week gargling with aqueous extract of Dandelion (Taraxacum officinale). Conclusion: The present finding concluded that, aqueous extract of Dandelion (Taraxacum officinale) could be use as a promising ingredient in manufacturing mouthwashs and other dental supplies that contribute in maintaining good oral hygiene during the course of orthodontic treatment with fixed appliances.","PeriodicalId":78326,"journal":{"name":"Iraqi Dental Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75119250","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 : 2018-08-01DOI: 10.26477/idj.v40i1.136.g92
Wasmaa S. Mahmood, S. A. Aziz, Imad A Jebouri
Aim of the study: To study the effect of reduced level of bone support on stress concentration and distribution. Also comparing the effect of different metals (gold, cobalt-chromium, and titanium) on alveolar supporting bone. Material and methods: A FEA method is used on a reduced bone support class I Kennedy classification, with three different rest positions (mesial, distal, mesial and distal) Co-Cr partial denture; Then changing the modulus of elasticity of the chrome-cobalt, to study the effect of gold and titanium alloy on the supporting bone surrounding the abutment in terms of stress distribution. Results: results revealed that best design type is by placing mesial and distal rest on abutment, also when comparing the three types of metals (Co-Cr, titanium, gold), there was no significant difference among the three metals.
{"title":"Studying the effect of different RPD design and materials on reduced bone support, a FEA study.","authors":"Wasmaa S. Mahmood, S. A. Aziz, Imad A Jebouri","doi":"10.26477/idj.v40i1.136.g92","DOIUrl":"https://doi.org/10.26477/idj.v40i1.136.g92","url":null,"abstract":"Aim of the study: To study the effect of reduced level of bone support on stress concentration and distribution. Also comparing the effect of different metals (gold, cobalt-chromium, and titanium) on alveolar supporting bone. Material and methods: A FEA method is used on a reduced bone support class I Kennedy classification, with three different rest positions (mesial, distal, mesial and distal) Co-Cr partial denture; Then changing the modulus of elasticity of the chrome-cobalt, to study the effect of gold and titanium alloy on the supporting bone surrounding the abutment in terms of stress distribution. Results: results revealed that best design type is by placing mesial and distal rest on abutment, also when comparing the three types of metals (Co-Cr, titanium, gold), there was no significant difference among the three metals.","PeriodicalId":78326,"journal":{"name":"Iraqi Dental Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74031206","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 : 2018-08-01DOI: 10.26477/idj.v40i1.138.g135
Wael Abdul Alrazzaq
The joining of a metal framework is frequently necessary to create individual orthodontic appliances and to achieve efficient treatment procedures. Stainless steel wires can be fused together by welding but this generally required reinforcement with solder. The present study was conducted to compare and evaluate the mechanical properties ( i.e. the tensile strength and elastic modulus )of silver soldered joints of stainless steel. A total of 40 wire specimens were prepared. The tensile strength and elastic modulus tests were carried out via by universal testing machine. the results indicated that the mean tensile strength of soldered group is lower than that of soldered group. As well, there are highly significant differences between two groups for tensile strength (p<0.01). Furthermore, the soldered group has the highest mean of elastic modulus than that of control group. As well, there are highly significant differences between two groups for elastic modulus (p<0.01). It is concluded that Stainless steel wires (Remanium)have superior mechanical properties with regard to tensile strength and elastic modulus.
{"title":"An Evaluation of Mechanical Properties (Tensile strength &Elastic Modulus) of Soldered Straight Stainless Steel Wire","authors":"Wael Abdul Alrazzaq","doi":"10.26477/idj.v40i1.138.g135","DOIUrl":"https://doi.org/10.26477/idj.v40i1.138.g135","url":null,"abstract":"The joining of a metal framework is frequently necessary to create individual orthodontic appliances and to achieve efficient treatment procedures. Stainless steel wires can be fused together by welding but this generally required reinforcement with solder. The present study was conducted to compare and evaluate the mechanical properties ( i.e. the tensile strength and elastic modulus )of silver soldered joints of stainless steel. A total of 40 wire specimens were prepared. The tensile strength and elastic modulus tests were carried out via by universal testing machine. the results indicated that the mean tensile strength of soldered group is lower than that of soldered group. As well, there are highly significant differences between two groups for tensile strength (p<0.01). Furthermore, the soldered group has the highest mean of elastic modulus than that of control group. As well, there are highly significant differences between two groups for elastic modulus (p<0.01). It is concluded that Stainless steel wires (Remanium)have superior mechanical properties with regard to tensile strength and elastic modulus.","PeriodicalId":78326,"journal":{"name":"Iraqi Dental Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78868099","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: Tooth discoloration is one of the great esthetic problems in dentistry, Despite vital bleaching, is often considered a first step to improve the appearance of teeth, reports are controversial about the effect of bleaching on the shear bond strengths (SBS) of brackets. Etching of enamel surface can be carried out by acid or laser, there was controversial about the efficiency of CO2 laser as enamel surface etchant Objective: The aim of the present study is to detect if there is a significant reduction in SBS of bleached teeth, and to detect the effect of CO2 laser as etchant on both bleached and normal teeth. Methods and materials: Forty non-carious first premolars are divided into 2 main groups: None- bleached (A) and Bleached (B) groups, of 20 specimens for each group, then the groups were subdivided into 2 subgroups (10 specimens for each subgroup). Group (B) teeth were bleached with chemically activated 40% hydrogen peroxide, while group (A) teeth were left without bleach- ing. The subgroups teeth (A1 and B1) were etched with CO2 laser and the subgroups (A2 and B2) were etched with 37% phosphoric acid. After bracket bonding, samples were then thermally cycled for 500 cycles between( 5°C and 55°C). Debonding was performed with a shearing force using the universal testing machine, then ANOVA and LSD test were used to specify if there was a significant difference between groups. Results: there was the nonsignificant difference in mean SBS of both phosphoric acid etching and CO2 laser etching in both bleached and normal surface enamel specimens A and B groups. Whereas there was a significant difference in mean shear bond strength between the CO2 laser etched and the phosphoric acid etched groups with highest mean values in the phosphoric acid etched subgroups, Conclusion: The results of this in vitro study suggest that hydrogen peroxide bleaching does not affect the shear bond strength of metal orthodontic brackets when bonding occurred 1 week after bleaching and CO2 laser etching has low shear bond strength values making it not suitable for clinical use.
{"title":"The Etching Effect of Co2 Laser on The Shear Bond Strength of Bleached Teeth","authors":"S. S. Othman","doi":"10.26477/IDJ.V39I3.129","DOIUrl":"https://doi.org/10.26477/IDJ.V39I3.129","url":null,"abstract":"Background: Tooth discoloration is one of the great esthetic problems in dentistry, Despite vital bleaching, is often considered a first step to improve the appearance of teeth, reports are controversial about the effect of bleaching on the shear bond strengths (SBS) of brackets. Etching of enamel surface can be carried out by acid or laser, there was controversial about the efficiency of CO2 laser as enamel surface etchant Objective: The aim of the present study is to detect if there is a significant reduction in SBS of bleached teeth, and to detect the effect of CO2 laser as etchant on both bleached and normal teeth. Methods and materials: Forty non-carious first premolars are divided into 2 main groups: None- bleached (A) and Bleached (B) groups, of 20 specimens for each group, then the groups were subdivided into 2 subgroups (10 specimens for each subgroup). Group (B) teeth were bleached with chemically activated 40% hydrogen peroxide, while group (A) teeth were left without bleach- ing. The subgroups teeth (A1 and B1) were etched with CO2 laser and the subgroups (A2 and B2) were etched with 37% phosphoric acid. After bracket bonding, samples were then thermally cycled for 500 cycles between( 5°C and 55°C). Debonding was performed with a shearing force using the universal testing machine, then ANOVA and LSD test were used to specify if there was a significant difference between groups. Results: there was the nonsignificant difference in mean SBS of both phosphoric acid etching and CO2 laser etching in both bleached and normal surface enamel specimens A and B groups. Whereas there was a significant difference in mean shear bond strength between the CO2 laser etched and the phosphoric acid etched groups with highest mean values in the phosphoric acid etched subgroups, Conclusion: The results of this in vitro study suggest that hydrogen peroxide bleaching does not affect the shear bond strength of metal orthodontic brackets when bonding occurred 1 week after bleaching and CO2 laser etching has low shear bond strength values making it not suitable for clinical use.","PeriodicalId":78326,"journal":{"name":"Iraqi Dental Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86810557","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: The removable appliances have played an important role in routine prosthodontics and orthodontics for centuries. When the appliances related diseases occur, several approaches have been suggested to manage the situation. Materials and methods: Forty samples of heat cured acrylic were fabricated, they were divided into four groups according to the quantity of chlorhexidine incorporated with the liquid of acrylic (10 samples per each group), and these groups are: Group1: control group mixing heat cure acrylic only (liquid is monomer only) Group2: mixing 3/4 heat cure acrylic liquid with 1/4 chlorehexidine. Group3: mixing 1/2 heat cure acrylic liquid with 1/2 chlorehexidine. Group4: 1/4 mixing heat cure acrylic liquid with 3/4 chlorehexidine. Results: The results of the present study found that the highest shore D Hardness number was for the control group with no ad- dition of chlorhexidine, while the lowest Shore D Hardness number was for group 4 (1/4 mixing heat cure acrylic liquid with 3/4 chlorehexidine). Conclusion: The results revealed a reduction in hardness with increase in the percentage of chlorhexidine addition to monomer.
{"title":"Effect of Different Concentration of Disinfectant Incorporated on Hardness of Heat Cured Acrylic Denture Base","authors":"L. E. Al-Jorani, Z. Alwahab","doi":"10.26477/IDJ.V39I3.130","DOIUrl":"https://doi.org/10.26477/IDJ.V39I3.130","url":null,"abstract":"Background: The removable appliances have played an important role in routine prosthodontics and orthodontics for centuries. When the appliances related diseases occur, several approaches have been suggested to manage the situation. Materials and methods: Forty samples of heat cured acrylic were fabricated, they were divided into four groups according to the quantity of chlorhexidine incorporated with the liquid of acrylic (10 samples per each group), and these groups are: Group1: control group mixing heat cure acrylic only (liquid is monomer only) Group2: mixing 3/4 heat cure acrylic liquid with 1/4 chlorehexidine. Group3: mixing 1/2 heat cure acrylic liquid with 1/2 chlorehexidine. Group4: 1/4 mixing heat cure acrylic liquid with 3/4 chlorehexidine. Results: The results of the present study found that the highest shore D Hardness number was for the control group with no ad- dition of chlorhexidine, while the lowest Shore D Hardness number was for group 4 (1/4 mixing heat cure acrylic liquid with 3/4 chlorehexidine). Conclusion: The results revealed a reduction in hardness with increase in the percentage of chlorhexidine addition to monomer.","PeriodicalId":78326,"journal":{"name":"Iraqi Dental Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81714452","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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