Pub Date : 2023-01-16DOI: 10.15517/ijds.2023.53751
F. Salemi
Three-dimensional cone-beam computed tomography (CBCT) has an important role in the detection of vertical root fractures (VRFs). The effect of artifact generation by high-density objects like dental implants on image quality was well documented. This study aimed to assess the effect of tooth-implant distance and the application of metal artifact reduction (MAR) algorithm on the detection of VRFs on CBCT scans. This study was conducted on 20 endodontically treated single-rooted teeth. VRFs were induced in 10 teeth, while the other 10 remained intact. The implant was inserted in the right second premolar socket area, and two teeth were inserted in right canine and right first premolar sockets area randomly and underwent CBCT with and without the application of MAR algorithm. SPSS 21 was used to analyze the results (alpha=0.05). According to the findings of this study, all four variables of sensitivity, specificity, accuracy, and positive predictive values in diagnosis were higher in cases without MAR software at both close(roots in first premolar sockets) and far distances (roots in canine sockets) from the implant. However, the highest rate of diagnosis accuracy of the first and second radiologists was in the far distance group from the implant without MAR, and the lowest rate of diagnosis accuracy in the first and second radiologists was in the close distance to the implant. Applying MAR algorithm had no positive effect on detection of VRFs on CBCT scans in both close and distant scenarios.
{"title":"Effect of Dental Distance from Implant and MAR Algorithm on the Detection of Vertical Root Fracture in CBCT Images","authors":"F. Salemi","doi":"10.15517/ijds.2023.53751","DOIUrl":"https://doi.org/10.15517/ijds.2023.53751","url":null,"abstract":"Three-dimensional cone-beam computed tomography (CBCT) has an important role in the detection of vertical root fractures (VRFs). The effect of artifact generation by high-density objects like dental implants on image quality was well documented. This study aimed to assess the effect of tooth-implant distance and the application of metal artifact reduction (MAR) algorithm on the detection of VRFs on CBCT scans. This study was conducted on 20 endodontically treated single-rooted teeth. VRFs were induced in 10 teeth, while the other 10 remained intact. The implant was inserted in the right second premolar socket area, and two teeth were inserted in right canine and right first premolar sockets area randomly and underwent CBCT with and without the application of MAR algorithm. SPSS 21 was used to analyze the results (alpha=0.05). According to the findings of this study, all four variables of sensitivity, specificity, accuracy, and positive predictive values in diagnosis were higher in cases without MAR software at both close(roots in first premolar sockets) and far distances (roots in canine sockets) from the implant. However, the highest rate of diagnosis accuracy of the first and second radiologists was in the far distance group from the implant without MAR, and the lowest rate of diagnosis accuracy in the first and second radiologists was in the close distance to the implant. Applying MAR algorithm had no positive effect on detection of VRFs on CBCT scans in both close and distant scenarios.","PeriodicalId":19450,"journal":{"name":"Odovtos - International Journal of Dental Sciences","volume":"26 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73906968","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 : 2022-11-29DOI: 10.15517/ijds.2022.53258
Juan Carlos Ramírez Barrantes
One of the most predominant challenges in oral rehabilitation is to predict the functional and aesthetic results of dental restorations. The success of the treatment depends on the correct execution of the different clinical and technical procedures performed at the dental laboratory. One of the fundamental steps is the final impression to obtain a precise replica of the cervical termination line. The correct diagnosis for the approach regarding the gingival tissues, the fidelity of the dental impression, and the shaving of the gingival margins in the working model will allow the establishment of a complete protocol for the diagnosis, planning, and execution of the treatment, potentiating more predictable results in the different clinical cases. The aim of this case report was to propose an alternative technique for undergraduate students regarding the shaving procedure of the working dies, obtaining an improved fitting in the marginal adaptation of the prosthetic parts performed at the laboratory.
{"title":"Shaving of the Plaster Working Dies Reusing the Final Silicone Impression. A Coupling Technique","authors":"Juan Carlos Ramírez Barrantes","doi":"10.15517/ijds.2022.53258","DOIUrl":"https://doi.org/10.15517/ijds.2022.53258","url":null,"abstract":"One of the most predominant challenges in oral rehabilitation is to predict the functional and aesthetic results of dental restorations. The success of the treatment depends on the correct execution of the different clinical and technical procedures performed at the dental laboratory. One of the fundamental steps is the final impression to obtain a precise replica of the cervical termination line. The correct diagnosis for the approach regarding the gingival tissues, the fidelity of the dental impression, and the shaving of the gingival margins in the working model will allow the establishment of a complete protocol for the diagnosis, planning, and execution of the treatment, potentiating more predictable results in the different clinical cases. The aim of this case report was to propose an alternative technique for undergraduate students regarding the shaving procedure of the working dies, obtaining an improved fitting in the marginal adaptation of the prosthetic parts performed at the laboratory.","PeriodicalId":19450,"journal":{"name":"Odovtos - International Journal of Dental Sciences","volume":"16 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83004954","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 : 2022-11-22DOI: 10.15517/ijds.2022.53204
Jorge Soto-Montero
.
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{"title":"The Troublesome and Delicate Relationship Between Scientific Evidence, Social Media and State-of-the-Art Clinical Practices","authors":"Jorge Soto-Montero","doi":"10.15517/ijds.2022.53204","DOIUrl":"https://doi.org/10.15517/ijds.2022.53204","url":null,"abstract":"<jats:p>.</jats:p>","PeriodicalId":19450,"journal":{"name":"Odovtos - International Journal of Dental Sciences","volume":"33 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74455016","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 : 2022-11-21DOI: 10.15517/ijds.2022.53197
Luis A. Martínez-Marcial, L. F. Jacinto-Alemán, David A Trejo-Remigio, C. M. Ramírez-Martínez, E. Leyva-Huerta
Mucoepidermoid carcinoma (MC) is the most common malignant epithelial neoplasm in the salivary glands. This neoplasm has varying proportions of mucous, epidermoid, intermediate, columnar, and clear cells. MCs have been associated with CRTC1-MAML2 genes; however, their pathogenesis is uncertain. Recently, epigenetic changes have been considered a possible aetiologic factor. To identify the methylation state of RB, P16, MGMT, and hMLH genes in the three severity grades of MC were used five MCs and one healthy minor salivary gland as a control group (CG) obtained from the Pathology and Oral Medicine Laboratory and analyzed using MS-PCR to compare the presence or absence of methylation in promotor regions. The Kruskal-Wallis test was performed, with p≤0.05 considered significant. CG was employed as the normalizer of methylation levels. All assays were performed in triplicate. The mean age of our population was 52.6±18.6 years old; the total population was female and included 2 low grade, 2 intermediate grade, and 1 high grade levels of severity. When comparing the methylation status of the three histopathological grades of MC against the control, statistically significant differences were observed in Rb-M, MGMT-M, and hMLH-1-NM for high-grade severity, with p values of 0.03, 0.05, and 0.04, respectively. Methylation is a possible mechanism for pathogenesis processing of high-grade MC. However, a larger sample population is necessary to validate this finding.
{"title":"Methylation Analysis of Rb, P16, MGMT, and hMLH-1in Mucoepidermoid Carcinomas. A Pilot Study","authors":"Luis A. Martínez-Marcial, L. F. Jacinto-Alemán, David A Trejo-Remigio, C. M. Ramírez-Martínez, E. Leyva-Huerta","doi":"10.15517/ijds.2022.53197","DOIUrl":"https://doi.org/10.15517/ijds.2022.53197","url":null,"abstract":"Mucoepidermoid carcinoma (MC) is the most common malignant epithelial neoplasm in the salivary glands. This neoplasm has varying proportions of mucous, epidermoid, intermediate, columnar, and clear cells. MCs have been associated with CRTC1-MAML2 genes; however, their pathogenesis is uncertain. Recently, epigenetic changes have been considered a possible aetiologic factor. To identify the methylation state of RB, P16, MGMT, and hMLH genes in the three severity grades of MC were used five MCs and one healthy minor salivary gland as a control group (CG) obtained from the Pathology and Oral Medicine Laboratory and analyzed using MS-PCR to compare the presence or absence of methylation in promotor regions. The Kruskal-Wallis test was performed, with p≤0.05 considered significant. CG was employed as the normalizer of methylation levels. All assays were performed in triplicate. The mean age of our population was 52.6±18.6 years old; the total population was female and included 2 low grade, 2 intermediate grade, and 1 high grade levels of severity. When comparing the methylation status of the three histopathological grades of MC against the control, statistically significant differences were observed in Rb-M, MGMT-M, and hMLH-1-NM for high-grade severity, with p values of 0.03, 0.05, and 0.04, respectively. Methylation is a possible mechanism for pathogenesis processing of high-grade MC. However, a larger sample population is necessary to validate this finding.","PeriodicalId":19450,"journal":{"name":"Odovtos - International Journal of Dental Sciences","volume":"128 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83225374","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 : 2022-11-15DOI: 10.15517/ijds.2022.53153
V. Méndez-González, Claudia Casillas-Contreras, M. Vitales-Noyola, D. Alvarado-Hernández, A. González-Amaro, A. Aragón-Piña, A. Pozos-Guillen
To evaluate whether the WaveOne Gold and Reciproc single file instrumentation systems, are effective in reducing the microbial load of a mixed biofilm and the cleaning of apical third compared to the Twisted File Adaptive system (multiple-file system). Seventy mesial roots of the first and second molars were included and randomly divided into three experimental groups (n=20, n=10 controls). Biofilms were formed inside canals over 31 days. After instrumentation with the unique file systems, WaveOne Gold and Reciproc and the multiple file system Twisted File Adaptive, using 2.25% sodium hypochlorite as an irrigant in all cases, a count of colony forming units was performed using serial dilutions, cleaning of the apical third was evaluated using scanning electron microscopy. Comparisons amongst groups were made by using parametric and non-parametric statistics, according to a normal or non-normal data distribution, respectively. No significant differences in the reduction of the microbial load after employing a single-file system in comparison to the multiple-file system were found; in addition, the cleaning of the apical third was similar for the three different instrumentation systems. The single-file system is equal in effectiveness compared with the multiple-file system in reducing the microbial load.
{"title":"Elimination of E. faecalis and C. albicans Biofilm: A Comparison Between Single and Multiple File Systems in an Ex Vivo Study","authors":"V. Méndez-González, Claudia Casillas-Contreras, M. Vitales-Noyola, D. Alvarado-Hernández, A. González-Amaro, A. Aragón-Piña, A. Pozos-Guillen","doi":"10.15517/ijds.2022.53153","DOIUrl":"https://doi.org/10.15517/ijds.2022.53153","url":null,"abstract":"To evaluate whether the WaveOne Gold and Reciproc single file instrumentation systems, are effective in reducing the microbial load of a mixed biofilm and the cleaning of apical third compared to the Twisted File Adaptive system (multiple-file system). Seventy mesial roots of the first and second molars were included and randomly divided into three experimental groups (n=20, n=10 controls). Biofilms were formed inside canals over 31 days. After instrumentation with the unique file systems, WaveOne Gold and Reciproc and the multiple file system Twisted File Adaptive, using 2.25% sodium hypochlorite as an irrigant in all cases, a count of colony forming units was performed using serial dilutions, cleaning of the apical third was evaluated using scanning electron microscopy. Comparisons amongst groups were made by using parametric and non-parametric statistics, according to a normal or non-normal data distribution, respectively. No significant differences in the reduction of the microbial load after employing a single-file system in comparison to the multiple-file system were found; in addition, the cleaning of the apical third was similar for the three different instrumentation systems. The single-file system is equal in effectiveness compared with the multiple-file system in reducing the microbial load.","PeriodicalId":19450,"journal":{"name":"Odovtos - International Journal of Dental Sciences","volume":"20 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87216728","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 : 2022-11-04DOI: 10.15517/ijds.2022.53064
Yadira V. Boza-Oreamuno, A. López-Soto
The torus are benign bony prominences that generally do not require treatment, however, they can occasionally present osteomyelitis (OM). The objective of this article is to describe the timely management of torus osteomyelitis through a series of clinical cases. Three patients with OM are reported. Two cases of men aged 66 and 69, diabetics, as well as a 57-year-old woman with a history of basal cell carcinoma of the nose. All had torus ulcers associated with trauma and without resolution of the same. In the three cases, a biopsy was performed to confirm the diagnosis and they were treated with anti-inflammatory drugs and antibiotic therapy, achieving complete resolution. Uncontrolled diabetes mellitus and trauma can favor the development of OM in patients with bone exostoses, therefore, when there are signs of infection in these structures, it is imperative to suspect the condition and offer treatment.
{"title":"Acute Osteomyelitis in Torus of Systemically Compromised Patients: Case Series","authors":"Yadira V. Boza-Oreamuno, A. López-Soto","doi":"10.15517/ijds.2022.53064","DOIUrl":"https://doi.org/10.15517/ijds.2022.53064","url":null,"abstract":"The torus are benign bony prominences that generally do not require treatment, however, they can occasionally present osteomyelitis (OM). The objective of this article is to describe the timely management of torus osteomyelitis through a series of clinical cases. Three patients with OM are reported. Two cases of men aged 66 and 69, diabetics, as well as a 57-year-old woman with a history of basal cell carcinoma of the nose. All had torus ulcers associated with trauma and without resolution of the same. In the three cases, a biopsy was performed to confirm the diagnosis and they were treated with anti-inflammatory drugs and antibiotic therapy, achieving complete resolution. Uncontrolled diabetes mellitus and trauma can favor the development of OM in patients with bone exostoses, therefore, when there are signs of infection in these structures, it is imperative to suspect the condition and offer treatment.","PeriodicalId":19450,"journal":{"name":"Odovtos - International Journal of Dental Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84941089","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 : 2022-10-31DOI: 10.15517/ijds.2022.52970
Ayca Sarialioglu Gungor, A. Durmuş, B. Zengin Kurt, Safiye Selin Köymen, N. Dönmez
This study evaluated selected structural and physical properties, such as degree of conversion (DC), Vickers hardness (VHN), and compression strength (CS), of three new dual-cure bulk-fill resin-based composites (RBCs; ACTIVA, HyperFIL, and Fill-Up) and compared them to those of a conventional RBC (Filtek Z250) at three clinically relevant depths. Samples (n=180) were prepared in three depths (2,4, and 6mm). Fourier-transform infrared spectroscopy (FTIR) analysis and VHN and CS tests were performed. The DC value was calculated by considering the relative change in the aliphatic C=C peaks. The fractured surfaces of representative samples were characterized using scanning electron microscopy (SEM). Data were statistically evaluated using two-way analysis of variance and post hoc Bonferroni tests (p<0.05). According to the VHN results, Filtek Z250 showed the highest bottom/top hardness ratio (97.94±1.01) at 2mm thickness and ACTIVA showed the lowest bottom/top hardness ratio (43.48±5.64) at 6mm thickness (p<0.001). According to the FTIR results, the DC decreased with increasing thickness in all materials (p<0.05). Filtek Z250 showed the highest (301±12.4 MPa) and ACTIVA exhibited the lowest (232±17.2 MPa) CS values at 2mm thickness (p<0.05). The lowest CS values were obtained for ACTIVA, and the highest values were obtained for Filtek Z250 for samples with thicknesses of 4 and 6mm, respectively (p<0.05). The structural features of restorative composites, such as the resin chemistry and filler type and content, and the operational parameters (i.e., material thickness and curing conditions) strongly affect crosslinking reactions and thus the DC, VHN, and CS values.
{"title":"Depth of Cure, Mechanical Properties and Morphology of Dual-Cure Bulk-Fill Composites","authors":"Ayca Sarialioglu Gungor, A. Durmuş, B. Zengin Kurt, Safiye Selin Köymen, N. Dönmez","doi":"10.15517/ijds.2022.52970","DOIUrl":"https://doi.org/10.15517/ijds.2022.52970","url":null,"abstract":"This study evaluated selected structural and physical properties, such as degree of conversion (DC), Vickers hardness (VHN), and compression strength (CS), of three new dual-cure bulk-fill resin-based composites (RBCs; ACTIVA, HyperFIL, and Fill-Up) and compared them to those of a conventional RBC (Filtek Z250) at three clinically relevant depths. Samples (n=180) were prepared in three depths (2,4, and 6mm). Fourier-transform infrared spectroscopy (FTIR) analysis and VHN and CS tests were performed. The DC value was calculated by considering the relative change in the aliphatic C=C peaks. The fractured surfaces of representative samples were characterized using scanning electron microscopy (SEM). Data were statistically evaluated using two-way analysis of variance and post hoc Bonferroni tests (p<0.05). According to the VHN results, Filtek Z250 showed the highest bottom/top hardness ratio (97.94±1.01) at 2mm thickness and ACTIVA showed the lowest bottom/top hardness ratio (43.48±5.64) at 6mm thickness (p<0.001). According to the FTIR results, the DC decreased with increasing thickness in all materials (p<0.05). Filtek Z250 showed the highest (301±12.4 MPa) and ACTIVA exhibited the lowest (232±17.2 MPa) CS values at 2mm thickness (p<0.05). The lowest CS values were obtained for ACTIVA, and the highest values were obtained for Filtek Z250 for samples with thicknesses of 4 and 6mm, respectively (p<0.05). The structural features of restorative composites, such as the resin chemistry and filler type and content, and the operational parameters (i.e., material thickness and curing conditions) strongly affect crosslinking reactions and thus the DC, VHN, and CS values.","PeriodicalId":19450,"journal":{"name":"Odovtos - International Journal of Dental Sciences","volume":"32 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76042665","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 : 2022-10-19DOI: 10.15517/ijds.2022.52853
J. Bermeo-Escalona, B. Cerda-Cristerna
Dentists have a high risk of contracting COVID-19, they needed to be aware of the major challenge that represents the dental practice and COVID-19. Accordingly, this study aimed: 1) to investigate the knowledge of dentists regarding COVID-19, 2) to investigate the attitudes of dentists concerning the use of personal protective equipment and, 3) to investigate the attitudes of dentists on stopping their dental practices in the framework of a contingency plan for the COVID-19 outbreak. An online cross-sectional survey was applied to dentists (n=822). Dentists in Mexico answered the survey, which was administered before the contingency plan for the COVID-19 outbreak. Results were analyzed with descriptive statistics and with a Chi-square test (P≤0.05). Of the respondents, 99% of dentists indicated knowing what COVID-19 is, knowing most, but not all, of its signs and symptoms and knowing its mode of transmission. The 89% of dentists indicated that they always used personal protective equipment. But they did not use always wear face masks, protective eyewear, face shields, disposable gowns, and caps. Dentists were aware of the risk of performing dental procedures during the COVID-19 outbreak. The 90% of dentists indicated that they would treat only patients requiring emergency treatment, and 10% indicated that they would not treat any patients. The dentists had limited knowledge about the COVID-19 disease. They did not use personal protective equipment consistently, and they indicated that they might continue working during the COVID-19 outbreak.
{"title":"Knowledge and attitudes of Mexican dentists regarding COVID-19","authors":"J. Bermeo-Escalona, B. Cerda-Cristerna","doi":"10.15517/ijds.2022.52853","DOIUrl":"https://doi.org/10.15517/ijds.2022.52853","url":null,"abstract":"Dentists have a high risk of contracting COVID-19, they needed to be aware of the major challenge that represents the dental practice and COVID-19. Accordingly, this study aimed: 1) to investigate the knowledge of dentists regarding COVID-19, 2) to investigate the attitudes of dentists concerning the use of personal protective equipment and, 3) to investigate the attitudes of dentists on stopping their dental practices in the framework of a contingency plan for the COVID-19 outbreak. An online cross-sectional survey was applied to dentists (n=822). Dentists in Mexico answered the survey, which was administered before the contingency plan for the COVID-19 outbreak. Results were analyzed with descriptive statistics and with a Chi-square test (P≤0.05). Of the respondents, 99% of dentists indicated knowing what COVID-19 is, knowing most, but not all, of its signs and symptoms and knowing its mode of transmission. The 89% of dentists indicated that they always used personal protective equipment. But they did not use always wear face masks, protective eyewear, face shields, disposable gowns, and caps. Dentists were aware of the risk of performing dental procedures during the COVID-19 outbreak. The 90% of dentists indicated that they would treat only patients requiring emergency treatment, and 10% indicated that they would not treat any patients. The dentists had limited knowledge about the COVID-19 disease. They did not use personal protective equipment consistently, and they indicated that they might continue working during the COVID-19 outbreak.","PeriodicalId":19450,"journal":{"name":"Odovtos - International Journal of Dental Sciences","volume":"18 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72450843","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 : 2022-10-12DOI: 10.15517/ijds.2022.52728
B. Dayı, Fikriye Öçal
To examine the colour change and surface roughness of giomer, microhybrid composite and nanohybrid composite after brushing with whitening toothpastes. Disc-shaped samples of giomer, microhybrid composite and nanohybrid composite were divided into three subgroups(n=10), with the initial colour measured with a spectrophotometer and the surface roughness measured with a mechanical profilometer. The samples, which were immersed in coffee solution were brushed once a day with whitening toothpastes (Opalescence Cool Mint (OCM), Colgate Optic White Extra Power (COW) and Signal White Now Gold (SWN)) for 12 days. Colour change and surface roughness were measured again after the colouring-brushing cycle. All of the analyses were performed using appropriate statistical hypothesis tests. The highest increase in surface roughness was seen in the microhybrid composite group applied with SWN (p<0.05). The group with the least increase was the giomer group applied with SWN (p<0.05). While the least colour change was observed in the COW applied nanohybrid composite group (∆E00=1,814), the most colour change occurred in the COW applied giomer group (∆E00=5.943). After the use of whitening toothpastes, the roughness of giomer, microhybrid composite and nanohybrid composite surfaces was increased and a colour change above the clinically accepted value was observed.
观察聚异构体、微杂化复合材料和纳米杂化复合材料用美白牙膏刷牙后的颜色变化和表面粗糙度。将异构体、微杂化复合材料和纳米杂化复合材料的圆盘状样品分为3个亚组(n=10)，用分光光度计测量初始颜色，用机械轮廓仪测量表面粗糙度。将样品浸泡在咖啡溶液中，每天用美白牙膏(Opalescence Cool Mint (OCM)、高露洁光学白额外能量(COW)和Signal White Now Gold (SWN))刷牙一次，持续12天。涂色循环后再次测量颜色变化和表面粗糙度。所有分析均采用适当的统计假设检验进行。微杂化复合材料组表面粗糙度增加幅度最大(p<0.05)。增重最小的组为应用SWN的异构体组(p<0.05)。纳米杂化复合材料组颜色变化最小(∆E00= 1814)，而异构体组颜色变化最大(∆E00=5.943)。使用美白牙膏后，异构体、微杂化复合材料和纳米杂化复合材料表面粗糙度增加，颜色变化高于临床可接受值。
{"title":"The Effect of Whitening Toothpastes on Colour Change and Surface Roughness of Restorative Materials","authors":"B. Dayı, Fikriye Öçal","doi":"10.15517/ijds.2022.52728","DOIUrl":"https://doi.org/10.15517/ijds.2022.52728","url":null,"abstract":"To examine the colour change and surface roughness of giomer, microhybrid composite and nanohybrid composite after brushing with whitening toothpastes. Disc-shaped samples of giomer, microhybrid composite and nanohybrid composite were divided into three subgroups(n=10), with the initial colour measured with a spectrophotometer and the surface roughness measured with a mechanical profilometer. The samples, which were immersed in coffee solution were brushed once a day with whitening toothpastes (Opalescence Cool Mint (OCM), Colgate Optic White Extra Power (COW) and Signal White Now Gold (SWN)) for 12 days. Colour change and surface roughness were measured again after the colouring-brushing cycle. All of the analyses were performed using appropriate statistical hypothesis tests. The highest increase in surface roughness was seen in the microhybrid composite group applied with SWN (p<0.05). The group with the least increase was the giomer group applied with SWN (p<0.05). While the least colour change was observed in the COW applied nanohybrid composite group (∆E00=1,814), the most colour change occurred in the COW applied giomer group (∆E00=5.943). After the use of whitening toothpastes, the roughness of giomer, microhybrid composite and nanohybrid composite surfaces was increased and a colour change above the clinically accepted value was observed.","PeriodicalId":19450,"journal":{"name":"Odovtos - International Journal of Dental Sciences","volume":"32 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82389055","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 : 2022-10-12DOI: 10.15517/ijds.2022.52727
Luis Angel García-Gonzales, Vilma Elizabeth Ruiz-García de Chacón
The purpose of this research was the tomographic evaluation of the Mandibular Buccal Shelf (MBS) in orthodontic patients with different vertical growth pattern. An observational, descriptive, cross-sectional and retrospective study was conducted. Tomographic images of patients aged 14 to 40 years were observed and a database was formed with those that met the inclusion criteria. The sample size was 10 for each group according to vertical growth pattern (hypodivergent, normodivergent and hyperdivergent). Then four zones of frequent insertion of extralveolar mini-screws were selected in the MBS, taking as a reference the mesial and distal roots of the first and second mandibular molar. When comparing the characteristics of MBS between vertical growth patterns, between sexes and hemiarchs, no statistically significant differences were found. However, when the characteristics of MBS were compared according to the reference root, it was found that there were statistically significant differences. The vestibular area to the distal root of the second mandibular molar presented the highest values in terms of angulation, height and thickness. There are no significant differences in the bone characteristics of MBS according to vertical growth patterns, sexes or hemiarchs. Angulation, height and thickness progressively increase from the vestibular bone of the mesial root of the first mandibular molar to the distal root of the second molar.
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