Alaeddine Mahfoudhi, O. Tayari, Amani Mizouri, J. Jaouadi
Abstract With senescence, edentulous patients present unfavorable clinical situations following the continued resorption of alveolar bone and the inevitable narrowing of the prosthetic corridor. That’s why rehabilitation with removable complete prosthesis presents a difficult challenge for the dentist. In this connection, the use of the piezographic technique, a promising therapeutic approach, makes it possible to better respect the physiology of the elderly patient while ensuring a compromise of retention, prosthesis stability and comfort. The aim of this manuscript is to present the different stages of realizing a removable complete denture resulting from an impression of the bearing surfaces and a piezographic recording of the prosthetic corridor through a clinical case.
{"title":"PIEZOGRAPHIE IN THE SERVICE OF EDENTULOUS: CLINICAL CASE REPORT","authors":"Alaeddine Mahfoudhi, O. Tayari, Amani Mizouri, J. Jaouadi","doi":"10.46466/IDJ.V43I1.262","DOIUrl":"https://doi.org/10.46466/IDJ.V43I1.262","url":null,"abstract":"Abstract With senescence, edentulous patients present unfavorable clinical situations following the continued resorption of alveolar bone and the inevitable narrowing of the prosthetic corridor. That’s why rehabilitation with removable complete prosthesis presents a difficult challenge for the dentist. In this connection, the use of the piezographic technique, a promising therapeutic approach, makes it possible to better respect the physiology of the elderly patient while ensuring a compromise of retention, prosthesis stability and comfort. The aim of this manuscript is to present the different stages of realizing a removable complete denture resulting from an impression of the bearing surfaces and a piezographic recording of the prosthetic corridor through a clinical case.","PeriodicalId":78326,"journal":{"name":"Iraqi Dental Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82251073","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}
Mental foramen shares its significance in various fields of dentistry. Being a strategically eminent landmark, an understanding of the variation of its position is important. Aim: To evaluate frequently occurring position of mental foramen and its distance with reference to the lower premolars using panoramic image. Method: Total 215 panoramic image of patients taken for different diagnostic purpose, using Planmeca X-ray unit ProMax, The position of the mental foramen was recorded according to the categories which were put forward by Jasser and Nwoku. Result: The most common position was found to be between the two premolars approximately 60.5% for both gender, followed by below the second premolar approximately 34.9% . conclusion: The most common location was reported to be between the two premolars, with a definite bilateral symmetry on both left and right sides. No gender preferences were observed
{"title":"ASSESSMENT OF MENTAL FORAMEN POSITION IN DENTATE SUBJECTS","authors":"J. J. Attar, Siba Ahmed Mohmmed","doi":"10.46466/IDJ.V43I1.261","DOIUrl":"https://doi.org/10.46466/IDJ.V43I1.261","url":null,"abstract":"Mental foramen shares its significance in various fields of dentistry. Being a strategically eminent landmark, an understanding of the variation of its position is important. Aim: To evaluate frequently occurring position of mental foramen and its distance with reference to the lower premolars using panoramic image. Method: Total 215 panoramic image of patients taken for different diagnostic purpose, using Planmeca X-ray unit ProMax, The position of the mental foramen was recorded according to the categories which were put forward by Jasser and Nwoku. Result: The most common position was found to be between the two premolars approximately 60.5% for both gender, followed by below the second premolar approximately 34.9% . conclusion: The most common location was reported to be between the two premolars, with a definite bilateral symmetry on both left and right sides. No gender preferences were observed","PeriodicalId":78326,"journal":{"name":"Iraqi Dental Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87270575","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}
Abstract Background: Provisional dental restoration fabricated to enhance esthetic, stabilization of abutment teeth and maintain function for limited period of time after which it is to be replaced by definitive fixed restoration. The surface roughness of temporary crowns are considered crucial in achieving successful definite restorations. Most bacteria in the oral cavity can only survive on hard and rough surfaces. The objective of the present study is to evaluate and compare the surface roughness of two types of commercially available composite material (Harvard- temp and Charm- temp). The specimens were tested in dry conditions and after two weeks of storage in artificial saliva at 25⁰C. Material and Methods: A total of 32 specimens of dimensions 64mm×10mm×2.5mm were divided in two groups according to the type of material (Harvard-temp or Charm-temp). Each group of material has 16 specimens. These 16 specimens were divided in two groups: a control group (eight specimens) in dry conditions and an aging group (eight specimens) and stored in artificial saliva for two weeks. The TR 200 device was used to measure the surface roughness of specimens in micrometers (µm) before and after aging in artificial saliva. Results: After comparing the results, a significant difference was found in the surface roughness in dry and aging conditions of Harvard – temp (P 0.05). Conclusion: that in-vitro aging research might be an informative predictor of provisional materials’ properties before clinical application. Clinical significance: Both materials can perform adequately in the oral cavity for two weeks. However, the Charm temp mayperform more adequately and maintain good surface roughness.
{"title":"THE EFFECT OF AGING ON SURFACE ROUGHNESS OF PROVISIONAL CROWN AND BRIDGE MATERIAL","authors":"Z. Abdullah, S. Dulaimi","doi":"10.46466/IDJ.V43I1.265","DOIUrl":"https://doi.org/10.46466/IDJ.V43I1.265","url":null,"abstract":"Abstract Background: Provisional dental restoration fabricated to enhance esthetic, stabilization of abutment teeth and maintain function for limited period of time after which it is to be replaced by definitive fixed restoration. The surface roughness of temporary crowns are considered crucial in achieving successful definite restorations. Most bacteria in the oral cavity can only survive on hard and rough surfaces. The objective of the present study is to evaluate and compare the surface roughness of two types of commercially available composite material (Harvard- temp and Charm- temp). The specimens were tested in dry conditions and after two weeks of storage in artificial saliva at 25⁰C. Material and Methods: A total of 32 specimens of dimensions 64mm×10mm×2.5mm were divided in two groups according to the type of material (Harvard-temp or Charm-temp). Each group of material has 16 specimens. These 16 specimens were divided in two groups: a control group (eight specimens) in dry conditions and an aging group (eight specimens) and stored in artificial saliva for two weeks. The TR 200 device was used to measure the surface roughness of specimens in micrometers (µm) before and after aging in artificial saliva. Results: After comparing the results, a significant difference was found in the surface roughness in dry and aging conditions of Harvard – temp (P 0.05). Conclusion: that in-vitro aging research might be an informative predictor of provisional materials’ properties before clinical application. Clinical significance: Both materials can perform adequately in the oral cavity for two weeks. However, the Charm temp mayperform more adequately and maintain good surface roughness.","PeriodicalId":78326,"journal":{"name":"Iraqi Dental Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74770867","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}
Postoperative instructions that are properly delivered can play a major role in treatment outcomes, especially excellent wound healing. This study aimed to examine the mode of delivering postoperative instructions in decreasing the side effects of poor wound healing following simple tooth extraction. This single-blinded, randomized clinical trial was conducted on 400 patients presented for simple extraction of unimpacted teeth. The patients were randomly assigned to two groups of verbal and verbal plus written instructed groups. Collected data were analysed using descriptive and inferential statistics at a significance level of 95%. More men (51.5%) were seen. The participants' mean age was 37.3 ± 14.3 years (range, 18-87 years). The results showed that the mode of delivering instructions had a marked relation with socket healing. The post-extraction healing score was significantly higher in the verbal and written instructed group compared with the verbal instructions alone (P = 0.00). The age (P = 0.04) and type of instruction (P = 0.00) were significantly associated with excellent wound healing. Only the type of instruction that independently predicted the excellent wound healing (OR = 0.12; P = 0.00). The mode of delivering post-operative instruction affected the post extraction socket healing. Patients who received written and verbal instructions reported excellent post extraction socket healing than those who had verbal instructions only. All medical practitioners are recommended to use both verbal and written post-operative instruction
{"title":"INFLUENCE OF POST-OPERATIVE INSTRUCTIONS ON WOUND HEALING. A RANDOMIZED, SINGLE-BLINDED CLINICAL TRIAL.","authors":"E. Ekaniyere, Aggrey-Nwanguma Ifeoma","doi":"10.26477/IDJ.V42I1.259","DOIUrl":"https://doi.org/10.26477/IDJ.V42I1.259","url":null,"abstract":"Postoperative instructions that are properly delivered can play a major role in treatment outcomes, especially excellent wound healing. This study aimed to examine the mode of delivering postoperative instructions in decreasing the side effects of poor wound healing following simple tooth extraction. This single-blinded, randomized clinical trial was conducted on 400 patients presented for simple extraction of unimpacted teeth. The patients were randomly assigned to two groups of verbal and verbal plus written instructed groups. Collected data were analysed using descriptive and inferential statistics at a significance level of 95%. More men (51.5%) were seen. The participants' mean age was 37.3 ± 14.3 years (range, 18-87 years). The results showed that the mode of delivering instructions had a marked relation with socket healing. The post-extraction healing score was significantly higher in the verbal and written instructed group compared with the verbal instructions alone (P = 0.00). The age (P = 0.04) and type of instruction (P = 0.00) were significantly associated with excellent wound healing. Only the type of instruction that independently predicted the excellent wound healing (OR = 0.12; P = 0.00). The mode of delivering post-operative instruction affected the post extraction socket healing. Patients who received written and verbal instructions reported excellent post extraction socket healing than those who had verbal instructions only. All medical practitioners are recommended to use both verbal and written post-operative instruction","PeriodicalId":78326,"journal":{"name":"Iraqi Dental Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78939501","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}
Objective: This study compared treatment outcome between two acute dentoalveolar abscesses in the same patients diagnosed simultaneously in both quadrants of the mandible, treated by either immediate or delayed extractions of the affected first and/or second molars. Methods: This is a prospective, cohort, clinical-based study. The timing of infected tooth is the predictor variable, whereas the healing parameters are the outcome variables. The outcome variables include timing of extraction, patients’ preference of immediate or delayed extraction, healing time of soft tissues surrounding extraction sockets, and development of complication(s). Other variables were grouped into demographic and clinical parameters. Descriptive and bivariate statistics were computed. Results: The sample composed of 77 patients with 154 molars grouped as follows: control (n= 77, 50%) extracted on first visit and experimental (n= 77, 50%) removed subsequently on the 5 th day. There was no significant association between acute dentoalveolar abscess and development of alveolar osteitis (P= 0.831) as complication rates were 5.2% in control group and 6.5% in experimental. Most patients preferred immediate extraction, and healing period of soft tissues was 0.5 weeks shorter in the control than experimental group (P= 0.57). Conclusion: The results of this study suggest that in patients with acute dentoalveolar abscess and accessible oral cavity, immediate extraction should be practiced.
{"title":"COMPARATIVE STUDY ON IMMEDIATE AND DELAYED EXTRACTION OF MANDIBULAR MOLARS IN THE MANAGEMENT OF ACUTE DENTOALVEOLAR ABSCESS","authors":"C. Anyanechi","doi":"10.46466/IDJ.V42I1.260","DOIUrl":"https://doi.org/10.46466/IDJ.V42I1.260","url":null,"abstract":"Objective: This study compared treatment outcome between two acute dentoalveolar abscesses in the same patients diagnosed simultaneously in both quadrants of the mandible, treated by either immediate or delayed extractions of the affected first and/or second molars. Methods: This is a prospective, cohort, clinical-based study. The timing of infected tooth is the predictor variable, whereas the healing parameters are the outcome variables. The outcome variables include timing of extraction, patients’ preference of immediate or delayed extraction, healing time of soft tissues surrounding extraction sockets, and development of complication(s). Other variables were grouped into demographic and clinical parameters. Descriptive and bivariate statistics were computed. Results: The sample composed of 77 patients with 154 molars grouped as follows: control (n= 77, 50%) extracted on first visit and experimental (n= 77, 50%) removed subsequently on the 5 th day. There was no significant association between acute dentoalveolar abscess and development of alveolar osteitis (P= 0.831) as complication rates were 5.2% in control group and 6.5% in experimental. Most patients preferred immediate extraction, and healing period of soft tissues was 0.5 weeks shorter in the control than experimental group (P= 0.57). Conclusion: The results of this study suggest that in patients with acute dentoalveolar abscess and accessible oral cavity, immediate extraction should be practiced.","PeriodicalId":78326,"journal":{"name":"Iraqi Dental Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83449340","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 : sialolithiasis remains an entity carrying a significant morbidity. This study covers the current principles guiding the surgical management of sialolithiasis in Iraqi sample including diagnostic tools, interventional options, surgical techniques and their outcomes. Materials and Methods : A clinical study of 22 cases with salivary gland stones were collected from two major teaching and referral hospital in Baghdad “Medical city, hospital of surgical specialities” and “Al-Kinidy hospital, maxillofacial department” from 2010-2015 Results : The study population composed of 22 cases. The age range was from 10-70 year with average of 40 years. The females were 7 cases (31.81%) and males were15 (68.18%). The majority of cases were submandibular gland 16 cases (72.72%) followed by sublingual gland 5 cases (22.72%) and the parotid gland (4.54%). The presence of stone was similar on both sides. The surgical approach was applied by removal of stone in 11 cases and removal of gland in 11 cases. Conclusion : Salivary calculi are common cause of salivary gland disorder. Sialography is an important tool for assessment of salivary gland obstruction in patients presenting with It should be done after the acute symptoms are subsided. Success is measured by treatment that is efficient, clinically effective and glad sparing.
{"title":"Incidence of Salivary gland stone as a main cause of sialoadenitis a clinical study was done on a sample of 22 Iraqi patients","authors":"Saher Abdualkader Ismaeel, W. Abaas","doi":"10.46466/idj.v41i2.197","DOIUrl":"https://doi.org/10.46466/idj.v41i2.197","url":null,"abstract":"Background : sialolithiasis remains an entity carrying a significant morbidity. This study covers the current principles guiding the surgical management of sialolithiasis in Iraqi sample including diagnostic tools, interventional options, surgical techniques and their outcomes. Materials and Methods : A clinical study of 22 cases with salivary gland stones were collected from two major teaching and referral hospital in Baghdad “Medical city, hospital of surgical specialities” and “Al-Kinidy hospital, maxillofacial department” from 2010-2015 Results : The study population composed of 22 cases. The age range was from 10-70 year with average of 40 years. The females were 7 cases (31.81%) and males were15 (68.18%). The majority of cases were submandibular gland 16 cases (72.72%) followed by sublingual gland 5 cases (22.72%) and the parotid gland (4.54%). The presence of stone was similar on both sides. The surgical approach was applied by removal of stone in 11 cases and removal of gland in 11 cases. Conclusion : Salivary calculi are common cause of salivary gland disorder. Sialography is an important tool for assessment of salivary gland obstruction in patients presenting with It should be done after the acute symptoms are subsided. Success is measured by treatment that is efficient, clinically effective and glad sparing.","PeriodicalId":78326,"journal":{"name":"Iraqi Dental Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89096248","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 entrance of a foreign body (FB) into the maxillary antrum is common in trauma patients where bullets or any other materials trapped in the maxillary sinus; however, iatrogenic cause by a dentist that results in FB entrapment in the maxillary antrum is rare. All these FBs can cause sinusitis. If not treated properly they will cause serious infection, which may spread to the other paranasal sinuses. A careful clinical examination and treatment plan will prevent further complications. In this review, we present a rare case of dental bur (DB) found in the left maxillary antrum. A review of literature revealed only a few cases published which describe a dental bur dislodged in the maxillary antrum.
{"title":"Unilateral Maxillary Sinusitis Caused By Dental Bur, A case Report","authors":"Sahar Abdualkader Ismaeel, S. S. Abdulrazaq","doi":"10.46466/IDJ.V41I2.196","DOIUrl":"https://doi.org/10.46466/IDJ.V41I2.196","url":null,"abstract":"the entrance of a foreign body (FB) into the maxillary antrum is common in trauma patients where bullets or any other materials trapped in the maxillary sinus; however, iatrogenic cause by a dentist that results in FB entrapment in the maxillary antrum is rare. All these FBs can cause sinusitis. If not treated properly they will cause serious infection, which may spread to the other paranasal sinuses. A careful clinical examination and treatment plan will prevent further complications. In this review, we present a rare case of dental bur (DB) found in the left maxillary antrum. A review of literature revealed only a few cases published which describe a dental bur dislodged in the maxillary antrum.","PeriodicalId":78326,"journal":{"name":"Iraqi Dental Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78258674","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}
Objective: To determine the frequency of symptomatic malpositioned mandibular third molars in elderly patients. Method: An analytic study of hospital records of elderly patients with symptomatic impacted mandibular third molars over 17 years was undertaken. Information on demographics, types of impaction, reasons for surgical extraction, and complications after treatment were obtained. Those who were asymptomatic would be excluded from analysis. Results: Altogether, 6214 impacted mandibular third molars were isolated in 5, 431 patients. However, 436 (7.0%) symptomatic impacted teeth were recorded in 436 (8.0%) patients and these were extracted, while the rest, 5778 (93.0%) were asymptomatic. Males were greater than females in the ratio of 1.1:1. The frequency of occurrence of mesio-angular and vertical impactions were significant (P= 0.001) compared with disto-angular and horizontal. Periodontal disease was 211 (48.4%) of the case in addition to dental caries and its clinical sequelae 203 (46.6%) were significant reasons for extractions (P=0.000). The common postoperative complications were alveolar osteitis and hypersensitivity of the adjacent molar 22(68.7%) which related to surgical extraction of disto-angular impactions (P= 0.001). Conclusions: This study showed the older the patient the less likely malpositioned mandibular third molar suggesting that majority of such impactions do not cause pathology after many years of their presence in the oral cavity. Prophylactic extraction of malpositioned mandibular third molars in all patients should be discouraged, but each case should be treated on merit or when symptomatic.
{"title":"Retrospective analysis of malpositioned mandibular third molars in elderly patients","authors":"C. Anyanechi, B. Saheeb","doi":"10.46466/idj.v41i2.193","DOIUrl":"https://doi.org/10.46466/idj.v41i2.193","url":null,"abstract":"Objective: To determine the frequency of symptomatic malpositioned mandibular third molars in elderly patients. Method: An analytic study of hospital records of elderly patients with symptomatic impacted mandibular third molars over 17 years was undertaken. Information on demographics, types of impaction, reasons for surgical extraction, and complications after treatment were obtained. Those who were asymptomatic would be excluded from analysis. Results: Altogether, 6214 impacted mandibular third molars were isolated in 5, 431 patients. However, 436 (7.0%) symptomatic impacted teeth were recorded in 436 (8.0%) patients and these were extracted, while the rest, 5778 (93.0%) were asymptomatic. Males were greater than females in the ratio of 1.1:1. The frequency of occurrence of mesio-angular and vertical impactions were significant (P= 0.001) compared with disto-angular and horizontal. Periodontal disease was 211 (48.4%) of the case in addition to dental caries and its clinical sequelae 203 (46.6%) were significant reasons for extractions (P=0.000). The common postoperative complications were alveolar osteitis and hypersensitivity of the adjacent molar 22(68.7%) which related to surgical extraction of disto-angular impactions (P= 0.001). Conclusions: This study showed the older the patient the less likely malpositioned mandibular third molar suggesting that majority of such impactions do not cause pathology after many years of their presence in the oral cavity. Prophylactic extraction of malpositioned mandibular third molars in all patients should be discouraged, but each case should be treated on merit or when symptomatic.","PeriodicalId":78326,"journal":{"name":"Iraqi Dental Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80742951","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. Al duliamy","doi":"10.46466/idj.v41i1.189","DOIUrl":"https://doi.org/10.46466/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":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74973553","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 : 2019-06-01DOI: 10.26477/IDJ.V41I1.180.G144
Zaid Ezzat Abdul-Majeed, I. Hummudi
Background: In chemistry the development of polymer has produced another material to poly methyl methacrylate such as epoxy resins, polyamides (nylon), acetyl resins -----etc. All these resins are suited for thermoplastic processing. Polyamide materials are more flexible than the commonly used polymethylmethacrylate. The flexibility of polyamide allows partial dentures to be pressed in one piece including clasps. Glass fibers are the most widely used reinforcing materials forming about 90 % of the reinforcement in resins. The addition of fibers to provisional restorative resin increases tensile strength, fracture toughness and surface hardness. Objective of the study: An evaluation of the surface roughness, modulus of elasticity and tensile strength improvement of flexible denture bases after adding of glass fibers and altering in powder – monomer ratio. Material and Methods: Eighty samples of flexible acrylic were made and divided into two main groups according to the type of test to be used. Forty samples for surface roughness and forty samples for tensile strength and (modulus of elasticity). Each group is divided into four subgroups according to fibers addition and to the alteration in powder-liquid ratio as follows: group (A) consists of (10 specimens) without the addition of glass fibers and with (3:1) powder- monomer ratio. Group (B) consists of (10 specimens) with addition of glass fibers and with (3:1) powder- monomer ratio, group (C) consists of (10 specimens) without addition of glass fibers and with (2.5:1) powder- monomer ratio and group (D) consists of (10 specimens) with glass fibers and with (2.5:1) powder- monomer ratio. The tensile strength and modulus of elasticity were determined by Instron testing machine at cross speed of 0.5mm/min. The T.R 200 device was used to indicate the values of surface roughness specimens before and after finishing and polishing. Results: In the present study, ANOVA test showed a significant difference at (P<0.05) between all the groups of tensile strength test.Least significant difference( LSD) test showed a non-significant difference at (P>0.05) between most of the tested groups except the groups of 3:1 powder–monomer ratio with and without fibers addition and groups of 3:1 ratio without fibers addition in comparison with the groups of 2.5:1 ratio with fibers addition which showed highly significant . The modulus of elasticity revealed a non-significant difference between all the tested groups at (P>0.05). While there were highly significant difference at (p<0.01) between groups of surface roughness test before and after polishing, except the group of 2.5:1 ratio with and without fibers addition which showed a non-significant difference at (P>0.05.). Conclusion: Conclusion was derived that fibers addition significantly affects tensile strength. The modulus of elasticity was not significantly affected by fibers addition or by powder-monomer ratio. Regarding surface roughness, it was improved aft
{"title":"Evaluation the Effect of Fibers Addition on Mechanical Properties of Flexible Acrylic Resin","authors":"Zaid Ezzat Abdul-Majeed, I. Hummudi","doi":"10.26477/IDJ.V41I1.180.G144","DOIUrl":"https://doi.org/10.26477/IDJ.V41I1.180.G144","url":null,"abstract":"Background: In chemistry the development of polymer has produced another material to poly methyl methacrylate such as epoxy resins, polyamides (nylon), acetyl resins -----etc. All these resins are suited for thermoplastic processing. Polyamide materials are more flexible than the commonly used polymethylmethacrylate. The flexibility of polyamide allows partial dentures to be pressed in one piece including clasps. Glass fibers are the most widely used reinforcing materials forming about 90 % of the reinforcement in resins. The addition of fibers to provisional restorative resin increases tensile strength, fracture toughness and surface hardness.\u0000\u0000Objective of the study: An evaluation of the surface roughness, modulus of elasticity and tensile strength improvement of flexible denture bases after adding of glass fibers and altering in powder – monomer ratio.\u0000\u0000Material and Methods: Eighty samples of flexible acrylic were made and divided into two main groups according to the type of test to be used. Forty samples for surface roughness and forty samples for tensile strength and (modulus of elasticity). Each group is divided into four subgroups according to fibers addition and to the alteration in powder-liquid ratio as follows: group (A) consists of (10 specimens) without the addition of glass fibers and with (3:1) powder- monomer ratio. Group (B) consists of (10 specimens) with addition of glass fibers and with (3:1) powder- monomer ratio, group (C) consists of (10 specimens) without addition of glass fibers and with (2.5:1) powder- monomer ratio and group (D) consists of (10 specimens) with glass fibers and with (2.5:1) powder- monomer ratio. The tensile strength and modulus of elasticity were determined by Instron testing machine at cross speed of 0.5mm/min. The T.R 200 device was used to indicate the values of surface roughness specimens before and after finishing and polishing.\u0000\u0000Results: In the present study, ANOVA test showed a significant difference at (P<0.05) between all the groups of tensile strength test.Least significant difference( LSD) test showed a non-significant difference at (P>0.05) between most of the tested groups except the groups of 3:1 powder–monomer ratio with and without fibers addition and groups of 3:1 ratio without fibers addition in comparison with the groups of 2.5:1 ratio with fibers addition which showed highly significant . The modulus of elasticity revealed a non-significant difference between all the tested groups at (P>0.05). While there were highly significant difference at (p<0.01) between groups of surface roughness test before and after polishing, except the group of 2.5:1 ratio with and without fibers addition which showed a non-significant difference at (P>0.05.).\u0000\u0000Conclusion: Conclusion was derived that fibers addition significantly affects tensile strength. The modulus of elasticity was not significantly affected by fibers addition or by powder-monomer ratio. Regarding surface roughness, it was improved aft","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":"74255650","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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