Pub Date : 2019-09-01DOI: 10.22038/JDMT.2019.13378
Shabnam Aghayan, Roya Assadi, A. B. Moghaddam, E. Seyedjafari
Introduction: This study sought to assess the cytotoxic effects of nanoparticulate and microparticulate calcium sodium phosphosilicate mouthwashes on human gingival fibroblasts (HGFs). Methods: This in vitro study was conducted on HGFs isolated and cultured in a 48-well plate containing standard culture medium for evaluation of four concentrations of the two mouthwashes at two time points plus a positive and a negative control group. The HGFs were exposed to 0.001, 0.01, 0.1 and 1 mg/mL concentrations of mouthwashes for 1 and 24 hours. Positive and negative control cells were exposed to saline and distilled water, respectively. Cell viability was assessed using the methyl thiazolyl tetrazolium (MTT) assay, and the number of viable cells was counted in triplicate using a cell counter after transfection (trypsin-EDTA 0.25%, 20 minutes) and exposure to trypan blue. The optical density (OD) values were read by ELISA reader and analyzed using the Kruskal-Wallis test. Results: Number of viable cells was not significantly different between the two mouthwashes at the two time points (P>0.05). At one hour, number of viable cells was higher in the nanoparticulate group while the number of viable cells in the microparticulate group was higher at 24 hours. Conclusion: Nanoparticulate and microparticulate calcium sodium phosphosilicate mouthwashes have no cytotoxicity against HGFs. Cytotoxicity of the nanoparticulate mouthwash was less than that of the microparticulate mouthwash. Also, increased proliferation of fibroblasts was noted over time in both groups of mouthwashes.
{"title":"Comparison of the Cytotoxic Effects of Nanoparticulate and Microparticulate Calcium Sodium Phosphosilicate Mouthwashes on Human Gingival Fibroblasts: an in-vitro Study","authors":"Shabnam Aghayan, Roya Assadi, A. B. Moghaddam, E. Seyedjafari","doi":"10.22038/JDMT.2019.13378","DOIUrl":"https://doi.org/10.22038/JDMT.2019.13378","url":null,"abstract":"Introduction: This study sought to assess the cytotoxic effects of nanoparticulate and microparticulate calcium sodium phosphosilicate mouthwashes on human gingival fibroblasts (HGFs). Methods: This in vitro study was conducted on HGFs isolated and cultured in a 48-well plate containing standard culture medium for evaluation of four concentrations of the two mouthwashes at two time points plus a positive and a negative control group. The HGFs were exposed to 0.001, 0.01, 0.1 and 1 mg/mL concentrations of mouthwashes for 1 and 24 hours. Positive and negative control cells were exposed to saline and distilled water, respectively. Cell viability was assessed using the methyl thiazolyl tetrazolium (MTT) assay, and the number of viable cells was counted in triplicate using a cell counter after transfection (trypsin-EDTA 0.25%, 20 minutes) and exposure to trypan blue. The optical density (OD) values were read by ELISA reader and analyzed using the Kruskal-Wallis test. Results: Number of viable cells was not significantly different between the two mouthwashes at the two time points (P>0.05). At one hour, number of viable cells was higher in the nanoparticulate group while the number of viable cells in the microparticulate group was higher at 24 hours. Conclusion: Nanoparticulate and microparticulate calcium sodium phosphosilicate mouthwashes have no cytotoxicity against HGFs. Cytotoxicity of the nanoparticulate mouthwash was less than that of the microparticulate mouthwash. Also, increased proliferation of fibroblasts was noted over time in both groups of mouthwashes.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"7 1 1","pages":"135-142"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89637646","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 : 2019-09-01DOI: 10.22038/JDMT.2019.13379
Noha Safari, Vahid Esfahanian, M. Kolahdoozan, Armin Khosravi
Abstract Introduction: The use of membranes and transplant materials as scaffolds in periodontal regenerative surgeries is gaining an increasing application for restoring the structure and function of lost tissues. The present study aimed to evaluate the mechanical properties of PEG/MA (Polyethylene glycol/Maleic Acid) copolymer as a bioscaffold. Methods: In this experimental laboratory study, a hydrogel scaffold was first manufactured of PEG/MA copolymer. Different hydrogel concentrations were prepared using visible light through changing concentrations of C2/1, c1/1 and C1/2 (C ⅟2, C ⅟1 and C2/1) of PEG/MA copolymer to those of dex-METH (dextran-methacrylate). Then, 57 samples were selected, 27 and 30 of which were related to degradation rate and solidification tests, respectively. The samples were examined in three triplet groups within three time periods to test the degradation rate. Five quintuplet groups were also classified to measure the tensile and compressive strengths using a microtensile device. Data were analyzed by one-way/two-way ANOVA and Tukey test. Results: Both the concentration of PEG/MA copolymer (P<0.007) and sample incubation duration (P<0.001) affected sample degradation rates, with C 2/1 group yielding the lowest degradation rate. Furthermore, mean values of tensile strength (P <0.04) and compressive strength (P< 0.001) were significantly different among the three groups. Conclusion: A change in the proportion of the copolymer ingredients can affect the mechanical properties and destruction rate of the substance. Due to slow degradation rate and high tensile strength, a concentration of 1/2 is more appropriate to be used as a membrane for covering bone loss.
{"title":"Evaluation of Mechanical Properties of Polyethylene Glycol/ Dextrane Methacrylate / Maleic Acid Copolymer as a Biological Scaffold","authors":"Noha Safari, Vahid Esfahanian, M. Kolahdoozan, Armin Khosravi","doi":"10.22038/JDMT.2019.13379","DOIUrl":"https://doi.org/10.22038/JDMT.2019.13379","url":null,"abstract":"Abstract \u0000Introduction: The use of membranes and transplant materials as scaffolds in periodontal regenerative surgeries is gaining an increasing application for restoring the structure and function of lost tissues. The present study aimed to evaluate the mechanical properties of PEG/MA (Polyethylene glycol/Maleic Acid) copolymer as a bioscaffold. Methods: In this experimental laboratory study, a hydrogel scaffold was first manufactured of PEG/MA copolymer. Different hydrogel concentrations were prepared using visible light through changing concentrations of C2/1, c1/1 and C1/2 (C ⅟2, C ⅟1 and C2/1) of PEG/MA copolymer to those of dex-METH (dextran-methacrylate). Then, 57 samples were selected, 27 and 30 of which were related to degradation rate and solidification tests, respectively. The samples were examined in three triplet groups within three time periods to test the degradation rate. Five quintuplet groups were also classified to measure the tensile and compressive strengths using a microtensile device. Data were analyzed by one-way/two-way ANOVA and Tukey test. Results: Both the concentration of PEG/MA copolymer (P<0.007) and sample incubation duration (P<0.001) affected sample degradation rates, with C 2/1 group yielding the lowest degradation rate. Furthermore, mean values of tensile strength (P <0.04) and compressive strength (P< 0.001) were significantly different among the three groups. Conclusion: A change in the proportion of the copolymer ingredients can affect the mechanical properties and destruction rate of the substance. Due to slow degradation rate and high tensile strength, a concentration of 1/2 is more appropriate to be used as a membrane for covering bone loss.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"22 1","pages":"143-148"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76270404","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 : 2019-06-02DOI: 10.22038/JDMT.2019.37684.1279
Alireza Khoshsirat, Sahand Samieirad, M. Hashemipour, Elahe Tohidi, Vajiheh Mianbandi
Abstract The prevalence of mandibular fracture is relatively lower in the pediatric population compared to adults. The treatment of these fractures is more challenging for oral and maxillofacial surgeons due to the concerns regarding mandible growth and the presence of developing tooth buds. According to the literature, conventional methods (e.g., soft diets or closed reduction) are more effective in the treatment of nondisplaced pediatric mandibular fractures. There are few case reports regarding the treatment of mandibular fractures in infants, which have mainly introduced new technique using double-crossed direct skeletal wires to reinforce circummandibular wirings for the conservative treatment of infantile mandibular fractures. The present study aimed to describe the case of a 12-month male infant with significant dislocated right mandibular parasymphysis fracture. Initially, two circummandibular wires were passed bilaterally to pull the mandibular segments for their vertical alignment. Afterwards, the skeletal buccal and lingual direct wires reinforced the previous circummandibular wiring to fit the fracture segments. Finally, all the wires were tightened simultaneously to maintain satisfactory bone reduction. Furthermore, the addition of skeletal buccal and lingual direct wires could reinforce the previous circummandibular wiring to fit the fracture segments anteroposteriorly. The fracture healed uneventfully with no complications, and intermaxillary fixation was not required in the patient. Moreover, the alveolar segments were in an appropriate position, and the maximum mouth opening of the patient was normal with no deviation, indicating a successful clinical outcome. This method was relatively reliable, noninvasive, and inexpensive, associated with the decreased discomfort and morbidity associated with maxillomandibular fixation, open reduction, and internal fixation in infants.
{"title":"Infantile Mandibular Fracture Treatment with Double-crossed Skeletal and Circummandibular Wires: A Case Report","authors":"Alireza Khoshsirat, Sahand Samieirad, M. Hashemipour, Elahe Tohidi, Vajiheh Mianbandi","doi":"10.22038/JDMT.2019.37684.1279","DOIUrl":"https://doi.org/10.22038/JDMT.2019.37684.1279","url":null,"abstract":"Abstract The prevalence of mandibular fracture is relatively lower in the pediatric population compared to adults. The treatment of these fractures is more challenging for oral and maxillofacial surgeons due to the concerns regarding mandible growth and the presence of developing tooth buds. According to the literature, conventional methods (e.g., soft diets or closed reduction) are more effective in the treatment of nondisplaced pediatric mandibular fractures. There are few case reports regarding the treatment of mandibular fractures in infants, which have mainly introduced new technique using double-crossed direct skeletal wires to reinforce circummandibular wirings for the conservative treatment of infantile mandibular fractures. The present study aimed to describe the case of a 12-month male infant with significant dislocated right mandibular parasymphysis fracture. Initially, two circummandibular wires were passed bilaterally to pull the mandibular segments for their vertical alignment. Afterwards, the skeletal buccal and lingual direct wires reinforced the previous circummandibular wiring to fit the fracture segments. Finally, all the wires were tightened simultaneously to maintain satisfactory bone reduction. Furthermore, the addition of skeletal buccal and lingual direct wires could reinforce the previous circummandibular wiring to fit the fracture segments anteroposteriorly. The fracture healed uneventfully with no complications, and intermaxillary fixation was not required in the patient. Moreover, the alveolar segments were in an appropriate position, and the maximum mouth opening of the patient was normal with no deviation, indicating a successful clinical outcome. This method was relatively reliable, noninvasive, and inexpensive, associated with the decreased discomfort and morbidity associated with maxillomandibular fixation, open reduction, and internal fixation in infants.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"13 1","pages":"153-158"},"PeriodicalIF":0.0,"publicationDate":"2019-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78513831","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: 10.22038/JDMT.2019.12536
Mugdha R Gharat, Abhishek N Zingade, Renuka Metgud, Jyoti M Ajbani, M. Kaderi
Introduction: Gingival recession (GR) is a common aesthetic problem associated with the cervical wear of the tooth structure and dentin hypersensitivity. Recently, periodontal-restorative approaches have been proposed for the management of GR associated with non-carious cervical lesions (NCCLs), which has proven effective. The present study aimed to evaluate this method. Methods: In total, 30 subjects with isolated Millers class I GR associated with NCCL in the maxillary canines and premolars were randomly assigned to group A (CTG) and group B (R+CTG). Clinical parameters, including the probing pocket depth (PPD), relative GR (RGR), keratinized tissue width (KTW), keratinized tissue thickness (KTT), relative clinical attachment level (CAL), cervical lesion height (CLH), and dentin hypersensitivity (DH), were recorded at baseline (BL) and after one and six months. In addition, maximum root coverage (MRC) was evaluated after six months. Results: In both groups, a statistically significant reduction was observed in the PPD, RGR, and CLH after six months (P=0.001). On the other hand, a significant increase was observed in the KTW, KTT, and CAL in both groups (P=0.001). Moreover, the visual analogue pain scores indicated a significant reduction in both groups, while the reduction was considered more significant in group B (P˂0.05) compared to group A. In groups A and B, 69.24% and 61.54% of the sites showed MRC, respectively. Conclusion: According to the results, both groups achieved comparable root coverage, while the presence of restoration led to a greater reduction in dentin hypersensitivity.
{"title":"Treatment of Gingival Recession Associated with Non-Carious Cervical Lesions Using Resin Modified Glass Ionomer Cement with Connective Tissue Graft a Randomized Controlled Clinical Trial","authors":"Mugdha R Gharat, Abhishek N Zingade, Renuka Metgud, Jyoti M Ajbani, M. Kaderi","doi":"10.22038/JDMT.2019.12536","DOIUrl":"https://doi.org/10.22038/JDMT.2019.12536","url":null,"abstract":"Introduction: Gingival recession (GR) is a common aesthetic problem associated with the cervical wear of the tooth structure and dentin hypersensitivity. Recently, periodontal-restorative approaches have been proposed for the management of GR associated with non-carious cervical lesions (NCCLs), which has proven effective. The present study aimed to evaluate this method. Methods: In total, 30 subjects with isolated Millers class I GR associated with NCCL in the maxillary canines and premolars were randomly assigned to group A (CTG) and group B (R+CTG). Clinical parameters, including the probing pocket depth (PPD), relative GR (RGR), keratinized tissue width (KTW), keratinized tissue thickness (KTT), relative clinical attachment level (CAL), cervical lesion height (CLH), and dentin hypersensitivity (DH), were recorded at baseline (BL) and after one and six months. In addition, maximum root coverage (MRC) was evaluated after six months. Results: In both groups, a statistically significant reduction was observed in the PPD, RGR, and CLH after six months (P=0.001). On the other hand, a significant increase was observed in the KTW, KTT, and CAL in both groups (P=0.001). Moreover, the visual analogue pain scores indicated a significant reduction in both groups, while the reduction was considered more significant in group B (P˂0.05) compared to group A. In groups A and B, 69.24% and 61.54% of the sites showed MRC, respectively. Conclusion: According to the results, both groups achieved comparable root coverage, while the presence of restoration led to a greater reduction in dentin hypersensitivity.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"12 1","pages":"85-94"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78851016","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: 10.22038/JDMT.2019.12520
E. Zajkani
Introduction: The growing demand for esthetic dental procedures has resulted in the increased development of new restorative composite resins. The success of composite resin restorations depends on their color stability over time. The present study aimed to evaluate the effects of 0.2% chlorhexidine (CHX) and re-polishing on the color stability of nanofilled composite resins. Methods: This interventional, in-vitro study was conducted on 48 disk-shaped samples (diameters: 8×2 mm), which were prepared using Z350 (3M ESPE, USA) and Grandio (VOCO, Germany) A2 shade composite resins. The samples were divided into four groups of 12 and immersed in CHX and distilled water for 14 days. Colorimetry of the samples was performed before and after immersion in the solutions and after re-polishing using a spectrophotometer. Data analysis was performed using the analysis of variance (ANOVA) and Tukey’s test at the significance level of α=0.05. Results: All the composite resin samples exhibited discoloration (ΔE1<3.3), and a significant difference was observed in discoloration with CHX between the two composite resins (P<0.05), with greater discoloration in the Grandio composite resin (ΔE1=2.041). In addition, the color changes of the samples were considered significant between water and CHX (P<0.05), and a distinct color change was denoted in the samples after re-polishing. Conclusion: According to the results, the color changes in the composite resins were a function of the type of the composite resin and solution used for immersion.
{"title":"Effects of 0.2% Chlorhexidine and Re-polishing on the Color Stability of Nanofilled Composite Resins","authors":"E. Zajkani","doi":"10.22038/JDMT.2019.12520","DOIUrl":"https://doi.org/10.22038/JDMT.2019.12520","url":null,"abstract":"Introduction: The growing demand for esthetic dental procedures has resulted in the increased development of new restorative composite resins. The success of composite resin restorations depends on their color stability over time. The present study aimed to evaluate the effects of 0.2% chlorhexidine (CHX) and re-polishing on the color stability of nanofilled composite resins. Methods: This interventional, in-vitro study was conducted on 48 disk-shaped samples (diameters: 8×2 mm), which were prepared using Z350 (3M ESPE, USA) and Grandio (VOCO, Germany) A2 shade composite resins. The samples were divided into four groups of 12 and immersed in CHX and distilled water for 14 days. Colorimetry of the samples was performed before and after immersion in the solutions and after re-polishing using a spectrophotometer. Data analysis was performed using the analysis of variance (ANOVA) and Tukey’s test at the significance level of α=0.05. Results: All the composite resin samples exhibited discoloration (ΔE1<3.3), and a significant difference was observed in discoloration with CHX between the two composite resins (P<0.05), with greater discoloration in the Grandio composite resin (ΔE1=2.041). In addition, the color changes of the samples were considered significant between water and CHX (P<0.05), and a distinct color change was denoted in the samples after re-polishing. Conclusion: According to the results, the color changes in the composite resins were a function of the type of the composite resin and solution used for immersion.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"6 1","pages":"73-78"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86804056","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: 10.22038/JDMT.2018.12378
Sahand Samieirad, Rashid Soofizadeh, Ahmad Shokouhifar, Vajiheh Mianbandi
Augmentation of deficient and atrophic alveolar ridges is an important aspect of dental implant therapy with the goal of providing a functional restoration in harmony with adjacent natural dentition. Bone splitting technique is considered a distinguished augmentation method for treatment of deficient alveolar ridges. According to this procedure, the compromised alveolar ridge is opened from the crest of the ridge and subsequently split with special chisel instruments. In this report, we described a case of horizontal ridge augmentation of an atrophic anterior maxillary ridge using ridge split in the first step and ridge expansion concomitant with implant placement in the second stage after 6 months. A two-step method of alveolar ridge split using piezosurgery followed by bone expansion is a reliable and successful treatment plan for implant recipient site rehabilitation in severe atrophic maxilla (less than 3 mm).
{"title":"A Two-step Method for the Preparation of Implant Recipient Site in Severe Atrophic Maxilla: A Case Report of the Alveolar Ridge Split Technique Followed by Bone Expansion","authors":"Sahand Samieirad, Rashid Soofizadeh, Ahmad Shokouhifar, Vajiheh Mianbandi","doi":"10.22038/JDMT.2018.12378","DOIUrl":"https://doi.org/10.22038/JDMT.2018.12378","url":null,"abstract":"Augmentation of deficient and atrophic alveolar ridges is an important aspect of dental implant therapy with the goal of providing a functional restoration in harmony with adjacent natural dentition. Bone splitting technique is considered a distinguished augmentation method for treatment of deficient alveolar ridges. According to this procedure, the compromised alveolar ridge is opened from the crest of the ridge and subsequently split with special chisel instruments. In this report, we described a case of horizontal ridge augmentation of an atrophic anterior maxillary ridge using ridge split in the first step and ridge expansion concomitant with implant placement in the second stage after 6 months. A two-step method of alveolar ridge split using piezosurgery followed by bone expansion is a reliable and successful treatment plan for implant recipient site rehabilitation in severe atrophic maxilla (less than 3 mm).","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"400 1","pages":"59-64"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78990671","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: 10.22038/JDMT.2019.12379
S. Mousavi, A. Akhavan, Shirin Shahnaseri, Fahime Razavi, Amirali Zahedinejad, Erfan Kolahdouzan
Introduction: Endodontic treatment failure is caused by the leakage of microorganisms and endotoxins, which leads to pathological lesions. Adequate seal of the root canal is essential to preventing recontamination and ensuring the long-term clinical success rate. Mineral trioxide aggregate (MTA) and calcium-enriched mixture cement (CEM) are common types of cement with adequate sealing capability in endodontics. The present study aimed to compare the microleakage in the root canals filled with ProRoot MTA and CEM cement using fluid filtration. Methods: This experimental, in-vitro study was conducted on 46 root canals of extracted mandibular premolars. After preparation and disinfection with 3% sodium hypochlorite, the crowns were resected from the cervical region. The teeth were randomly divided into two experimental groups of 20 based on the tested materials (ProRoot MTA and CEM cement), as well as two negative and positive control groups of three. All the samples were instrumented and obturated using the step-back technique, and fluid filtration was used to evaluate sealing ability and leakage inhibition. Data analysis was performed using the Mann-Whitney U test (α=0.05). Results: Mean microleakage in the ProRoot MTA and CEM cement was 2±0.79 and 3.02±1.38 µL/8 min, respectively. In addition, a significant difference was observed between the two groups in this regard (P<0.011).Conclusion: According to the results, ProRoot MTA provided significantly less microleakage compared to the CEM cement. Therefore, the sealing ability of ProRoot MTA was higher than the CEM cement, which makes MTA a better material than CEM cement for canal obturation.
{"title":"In-vitro Evaluation of Microleakage in Root Canal Obturation with Mineral Trioxide Aggregate and Calcium-enriched Mixture Cement Using Fluid Filtration","authors":"S. Mousavi, A. Akhavan, Shirin Shahnaseri, Fahime Razavi, Amirali Zahedinejad, Erfan Kolahdouzan","doi":"10.22038/JDMT.2019.12379","DOIUrl":"https://doi.org/10.22038/JDMT.2019.12379","url":null,"abstract":"Introduction: Endodontic treatment failure is caused by the leakage of microorganisms and endotoxins, which leads to pathological lesions. Adequate seal of the root canal is essential to preventing recontamination and ensuring the long-term clinical success rate. Mineral trioxide aggregate (MTA) and calcium-enriched mixture cement (CEM) are common types of cement with adequate sealing capability in endodontics. The present study aimed to compare the microleakage in the root canals filled with ProRoot MTA and CEM cement using fluid filtration. Methods: This experimental, in-vitro study was conducted on 46 root canals of extracted mandibular premolars. After preparation and disinfection with 3% sodium hypochlorite, the crowns were resected from the cervical region. The teeth were randomly divided into two experimental groups of 20 based on the tested materials (ProRoot MTA and CEM cement), as well as two negative and positive control groups of three. All the samples were instrumented and obturated using the step-back technique, and fluid filtration was used to evaluate sealing ability and leakage inhibition. Data analysis was performed using the Mann-Whitney U test (α=0.05). Results: Mean microleakage in the ProRoot MTA and CEM cement was 2±0.79 and 3.02±1.38 µL/8 min, respectively. In addition, a significant difference was observed between the two groups in this regard (P<0.011).Conclusion: According to the results, ProRoot MTA provided significantly less microleakage compared to the CEM cement. Therefore, the sealing ability of ProRoot MTA was higher than the CEM cement, which makes MTA a better material than CEM cement for canal obturation.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"41 1","pages":"95-100"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74702423","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: 10.22038/JDMT.2019.12523
M. Imani̇moghaddam, S. Nasseri, Mansoureh Darijani, A. Bagherpur, A. Madani
Abstract Introduction: The present study aimed to review the condylar changes in the patients with osteoarthritis using cone beam computed tomography (CBCT) images. Methods: In this study, 80 CBCT images of the temporomandibular joint (TMJ) pertaining 20 patients with osteoarthritis and 20 healthy individuals were evaluated, as well as the CBCT images that were obtained for other reasons. The images were reviewed in the coronal and sagittal sections. Considering the higher prevalence of osteoarthritis in women and after eliminating gender-based interventions, all the female patients were enrolled in the study. Chi-square was used to evaluate the correlations between the changes in the condylar head by the grouping of the patients, and the significance level was considered at 0.05. Results: The correlation of condylar head flattening (P=0.051) and Ely’s cysts (P=0.544) was assessed in the control group and osteoarthritis patients, and no significant difference was observed between the two variables and patient classification. In addition, the association between erosion (P<0.001) and osteophyte (P=0.002) of the condylar head was evaluated in the control group and osteoarthritis patients, and the presence or absence of these conditions had a significant correlation with disease grouping. Conclusion: According to the results, the presence of osteophyte and erosion was more significant in the osteoarthritis group compared to the healthy subjects. The most prevalent bony changes in the condylar head were due to flattening, and the less prevalent changes were associated with Ely’s cysts. Moreover, osteophyte and erosion were more prevalent in the patients with osteoarthritis.
{"title":"The Prevalence of Partial Changes in the Condylar Head in the Patients with Osteoarthritis: A Cone Beam Computed Tomography (CBCT) Study","authors":"M. Imani̇moghaddam, S. Nasseri, Mansoureh Darijani, A. Bagherpur, A. Madani","doi":"10.22038/JDMT.2019.12523","DOIUrl":"https://doi.org/10.22038/JDMT.2019.12523","url":null,"abstract":"Abstract Introduction: The present study aimed to review the condylar changes in the patients with osteoarthritis using cone beam computed tomography (CBCT) images. Methods: In this study, 80 CBCT images of the temporomandibular joint (TMJ) pertaining 20 patients with osteoarthritis and 20 healthy individuals were evaluated, as well as the CBCT images that were obtained for other reasons. The images were reviewed in the coronal and sagittal sections. Considering the higher prevalence of osteoarthritis in women and after eliminating gender-based interventions, all the female patients were enrolled in the study. Chi-square was used to evaluate the correlations between the changes in the condylar head by the grouping of the patients, and the significance level was considered at 0.05. Results: The correlation of condylar head flattening (P=0.051) and Ely’s cysts (P=0.544) was assessed in the control group and osteoarthritis patients, and no significant difference was observed between the two variables and patient classification. In addition, the association between erosion (P<0.001) and osteophyte (P=0.002) of the condylar head was evaluated in the control group and osteoarthritis patients, and the presence or absence of these conditions had a significant correlation with disease grouping. Conclusion: According to the results, the presence of osteophyte and erosion was more significant in the osteoarthritis group compared to the healthy subjects. The most prevalent bony changes in the condylar head were due to flattening, and the less prevalent changes were associated with Ely’s cysts. Moreover, osteophyte and erosion were more prevalent in the patients with osteoarthritis.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"67 1","pages":"79-84"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83118052","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}
Odontoma is the most frequent odontogenic gnathic tumor, which is considered to be a hamartomatous lesion rather than an actual odontogenic tumor. Odontoma is basically composed of enamel and dentin, while it could also have various contents of cementum and pulp tissue. These lesions may manifest in two specific forms, including the compound type with multiple, small, tooth-like structures and the complex form with amorphous calcified masses. The early detection, management, and surgical enucleation of odontomas are recommended to prevent tooth eruption disturbances and further pathological complications. The present study aimed to describe a rare case of compound odontoma in the anterior maxilla with an unusually high number of denticles in a 19-year-old Iranian female patient. 62 denticles were extracted presenting a unique case of odontoma, compared to the previously reported subjects with less number of denticles. In addition, the clinical, radiographic, and histopathological aspects, as well as the other possible systemic disorders and selected management approach, were discussed.
{"title":"A Rare Case of Maxillary Compound Odontoma with an Unusual Large Number of Denticles","authors":"Adel Sharifi Rayeni, Sahand Samieirad, Vajiheh Mianbandi, N. Saghravanian, Elahe Tohidi","doi":"10.22038/JDMT.2019.12561","DOIUrl":"https://doi.org/10.22038/JDMT.2019.12561","url":null,"abstract":"Odontoma is the most frequent odontogenic gnathic tumor, which is considered to be a hamartomatous lesion rather than an actual odontogenic tumor. Odontoma is basically composed of enamel and dentin, while it could also have various contents of cementum and pulp tissue. These lesions may manifest in two specific forms, including the compound type with multiple, small, tooth-like structures and the complex form with amorphous calcified masses. The early detection, management, and surgical enucleation of odontomas are recommended to prevent tooth eruption disturbances and further pathological complications. The present study aimed to describe a rare case of compound odontoma in the anterior maxilla with an unusually high number of denticles in a 19-year-old Iranian female patient. 62 denticles were extracted presenting a unique case of odontoma, compared to the previously reported subjects with less number of denticles. In addition, the clinical, radiographic, and histopathological aspects, as well as the other possible systemic disorders and selected management approach, were discussed.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"647 1","pages":"101-106"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76264895","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: 10.22038/JDMT.2019.12585
Monika Dagdiya, A. Pakhan, A. Bhoyar, S. Godbole, S. Sathe
Introduction: Acrylic resins have been used successfully as denture bases. However, acrylic resin denture base materials are brittle and have poor strength and thermal conductivity. Therefore, it is essential to improve the flexural strength of heat polymerized acrylic resin. The present study aimed to evaluate and compare the flexural strength of heated polymerized acrylic resin with the addition of 8% and 13% aluminum oxide powder. Methods: In total, 90 acrylic specimens were fabricated and divided into three groups of A1 (unmodified heat-cured denture base resin), A2 and A3 (heat-cured denture base resin polymer modified with 8% and 13% by weight of aluminum oxide powder, respectively). The specimens were stored in distilled water for one week, and flexural strength was assessed using a universal testing machine. Data analysis was performed using one-way analysis of variance (ANOVA). Results: Comparison of groups A1 and A2 (8%) showed the highest flexural strength (85.94 MPa) in group A2. A significant increase was observed in the values of flexural strength with 13% alumina addition. Comparison of groups A1 and A3 (13%) showed the highest flexural strength (86.41 MPa) in group A3, and the difference in the mean values of flexural strength was considered significant. Moreover, comparison of groups A2 and A3 indicated the highest flexural strength in group A3. Conclusion: Addition of alumina to conventional heat-cured acrylic resin shows increase in flexural strength. Increasing the flexural strength of acrylic resin base materials could results in higher clinical success rate.
{"title":"Comparative Evaluation of the Flexural Strength of Heat Polymerized Acrylic Resin with the Addition of 8% and 13% Aluminum Oxide Powder: An In-vitro Study","authors":"Monika Dagdiya, A. Pakhan, A. Bhoyar, S. Godbole, S. Sathe","doi":"10.22038/JDMT.2019.12585","DOIUrl":"https://doi.org/10.22038/JDMT.2019.12585","url":null,"abstract":"Introduction: Acrylic resins have been used successfully as denture bases. However, acrylic resin denture base materials are brittle and have poor strength and thermal conductivity. Therefore, it is essential to improve the flexural strength of heat polymerized acrylic resin. The present study aimed to evaluate and compare the flexural strength of heated polymerized acrylic resin with the addition of 8% and 13% aluminum oxide powder. Methods: In total, 90 acrylic specimens were fabricated and divided into three groups of A1 (unmodified heat-cured denture base resin), A2 and A3 (heat-cured denture base resin polymer modified with 8% and 13% by weight of aluminum oxide powder, respectively). The specimens were stored in distilled water for one week, and flexural strength was assessed using a universal testing machine. Data analysis was performed using one-way analysis of variance (ANOVA). Results: Comparison of groups A1 and A2 (8%) showed the highest flexural strength (85.94 MPa) in group A2. A significant increase was observed in the values of flexural strength with 13% alumina addition. Comparison of groups A1 and A3 (13%) showed the highest flexural strength (86.41 MPa) in group A3, and the difference in the mean values of flexural strength was considered significant. Moreover, comparison of groups A2 and A3 indicated the highest flexural strength in group A3. Conclusion: Addition of alumina to conventional heat-cured acrylic resin shows increase in flexural strength. Increasing the flexural strength of acrylic resin base materials could results in higher clinical success rate.","PeriodicalId":15640,"journal":{"name":"Journal of Dental Materials and Techniques","volume":"25 1","pages":"65-72"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74076461","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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