L. Gonçalves, Eui-Geum Kim, J. Bortolatto, Marilia Rabello Buzalaf, L. Alreshaid, A. Prakki
{"title":"Insights on the role of cytokines in carious lesions","authors":"L. Gonçalves, Eui-Geum Kim, J. Bortolatto, Marilia Rabello Buzalaf, L. Alreshaid, A. Prakki","doi":"10.4322/bds.2023.e3666","DOIUrl":"https://doi.org/10.4322/bds.2023.e3666","url":null,"abstract":"","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83840102","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}
M. Patel, Gabryelle Fagundes Novato, Gabriela Santos Dourado, Ana Carla Raphaelli Nahás, M. Matias, L. Maltagliati
Objective: considering the behavioral and paradigm changes due to the social isolation imposed by the new coronavirus pandemic, patients and orthodontists also have anxieties and insecurities in face of the new reality in dental clinics and educational institutions. This study aimed to evaluate, by means of an online questionnaire, the applicability of tele-orthodontics and tele-assistance, the behavior of patients regarding the initiation of or return to orthodontic treatment, and the new changes in clinical care. Material and Methods: the questionnaire was based on the Google Forms platform and consisted of three parts: the first one involved study presentation and informed consent form; the second one involved demographic data collection and characterization of the respondents
{"title":"Post-COVID-19 influence in orthodontic care from the patient s perspective","authors":"M. Patel, Gabryelle Fagundes Novato, Gabriela Santos Dourado, Ana Carla Raphaelli Nahás, M. Matias, L. Maltagliati","doi":"10.4322/bds.2023.e3597","DOIUrl":"https://doi.org/10.4322/bds.2023.e3597","url":null,"abstract":"Objective: considering the behavioral and paradigm changes due to the social isolation imposed by the new coronavirus pandemic, patients and orthodontists also have anxieties and insecurities in face of the new reality in dental clinics and educational institutions. This study aimed to evaluate, by means of an online questionnaire, the applicability of tele-orthodontics and tele-assistance, the behavior of patients regarding the initiation of or return to orthodontic treatment, and the new changes in clinical care. Material and Methods: the questionnaire was based on the Google Forms platform and consisted of three parts: the first one involved study presentation and informed consent form; the second one involved demographic data collection and characterization of the respondents","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88309621","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}
Moamin I. ISSA, Marwah Ismael ABDULAZEEZ, Abdalbseet A. FATALLA
Objective: This study was conducted to evaluate the influence of the G-CEM ONE adhesive enhancing primer on the shear bond strength of self-adhesive resin cement (G-CEM ONE) to both tooth structure and two different CAD/ CAM blocks (GC Initial LiSi and Cerasmart 270). Material and Methods: Forty specimens (cylindrical-shaped, 5 mm in diameter and height) were milled from both CAD/CAM blocks (20 specimens from each block type). Forty sound upper premolars were sectioned to the level of peripheral dentin, then randomly divided into four groups (n = 10): A1: GC Initial LiSi without adhesive enhancing primer; B1: Cerasmart 270 without adhesive enhancing primer; A2: GC Initial LiSi with adhesive enhancing primer; B2: Cerasmart 270 group with adhesive enhancing primer application. The CAD/CAM blocks were cemented on teeth using a self-adhesive resin cement (G-cem one). The shear bond strength was assessed using a computerized universal testing machine. A digital microscope was used to study the mode of failure. The shear bond strength values data were analyzed statistically using paired t-test and independent t-test at the significance level of (0.05). Results: A significant difference was shown in the shear bond strength values among groups (P =0.000). The highest shear bond strength value was revealed in group A2, while group B1 exhibited the lowest shear bond strength value. Conclusion: Using the adhesive enhancing primer on the tooth’s surface improved the resin cement’s bond strength to CAD/CAM blocks. Additionally, GC Initial LiSi exhibited higher bond strength than Cerasmart 270, with or without the primer. KEYWORDS Adhesive; CAD/CAM; Dentin; Resin cement; Shear strength.
{"title":"Effect of adhesive primer application on shear bond strength of self-adhesive cement to tooth structure and two different CAD/CAM milled blocks","authors":"Moamin I. ISSA, Marwah Ismael ABDULAZEEZ, Abdalbseet A. FATALLA","doi":"10.4322/bds.2023.e3978","DOIUrl":"https://doi.org/10.4322/bds.2023.e3978","url":null,"abstract":"Objective: This study was conducted to evaluate the influence of the G-CEM ONE adhesive enhancing primer on the shear bond strength of self-adhesive resin cement (G-CEM ONE) to both tooth structure and two different CAD/ CAM blocks (GC Initial LiSi and Cerasmart 270). Material and Methods: Forty specimens (cylindrical-shaped, 5 mm in diameter and height) were milled from both CAD/CAM blocks (20 specimens from each block type). Forty sound upper premolars were sectioned to the level of peripheral dentin, then randomly divided into four groups (n = 10): A1: GC Initial LiSi without adhesive enhancing primer; B1: Cerasmart 270 without adhesive enhancing primer; A2: GC Initial LiSi with adhesive enhancing primer; B2: Cerasmart 270 group with adhesive enhancing primer application. The CAD/CAM blocks were cemented on teeth using a self-adhesive resin cement (G-cem one). The shear bond strength was assessed using a computerized universal testing machine. A digital microscope was used to study the mode of failure. The shear bond strength values data were analyzed statistically using paired t-test and independent t-test at the significance level of (0.05). Results: A significant difference was shown in the shear bond strength values among groups (P =0.000). The highest shear bond strength value was revealed in group A2, while group B1 exhibited the lowest shear bond strength value. Conclusion: Using the adhesive enhancing primer on the tooth’s surface improved the resin cement’s bond strength to CAD/CAM blocks. Additionally, GC Initial LiSi exhibited higher bond strength than Cerasmart 270, with or without the primer. KEYWORDS Adhesive; CAD/CAM; Dentin; Resin cement; Shear strength.","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135504999","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}
Vanessa Lira SIQUEIRA, Valéria Bordallo PACHECO, Gabriela Mancia de GUTIERREZ, Michele Baffi DINIZ, Maria Teresa Botti Rodrigues dos SANTOS
Objective: to evaluate the impact of the COVID-19 pandemic on children and adolescents with cerebral palsy, comparing the gingival condition and the type of dental treatment before and after the interruption of dental care. Material and Methods: the retrospective longitudinal study consisted of 273 participants undergoing Dental Clinic of the AACD (Disabled Child Assistance Association), divided into three groups according to age: Group 1 (G1: 0 to 5 years and 11 months; n=137), Group 2 (G2: 6 to 11 years and 11 months; n=85) and Group 3 (G3: 12 to 17 years and 11 months; n=51). Sociodemographic, data, clinical pattern of cerebral palsy and use of medication were collected, evaluating the gingival condition by the gingival index and the type of dental treatment before the pandemic and during, nine months after the interruption of dental care. Chi-square, Fisher Exact and Kruskal-Wallis (a = 5%) tests were used. Results: the groups were homogeneous in terms of sex (p=0.4581), race (p=0.1725), clinical pattern (p=0.3482) and use of antiepileptic drugs (p=0.3509). Regarding the gingival condition, in the period during the pandemic, there was a reduction in the number of participants with Gingival Index scores 0 and 1 and an increase in participants with scores 2 and 3 (p<0.05). As for the procedures performed, the three groups showed a reduction in preventive procedures (p<0.05) and an increase in surgical, periodontal and restorative procedures (p<0.05). Conclusion: it is concluded that the interruption of dental care for nine months during the COVID-19 pandemic in children and adolescents with cerebral palsy had a negative impact on oral health. KEYWORDS COVID-19; Caregivers; Gingivitis; Oral health; Cerebral palsy.
{"title":"Impact of the COVID-19 pandemic on the gingival health of children and adolescents with cerebral palsy","authors":"Vanessa Lira SIQUEIRA, Valéria Bordallo PACHECO, Gabriela Mancia de GUTIERREZ, Michele Baffi DINIZ, Maria Teresa Botti Rodrigues dos SANTOS","doi":"10.4322/bds.2023.e3799","DOIUrl":"https://doi.org/10.4322/bds.2023.e3799","url":null,"abstract":"Objective: to evaluate the impact of the COVID-19 pandemic on children and adolescents with cerebral palsy, comparing the gingival condition and the type of dental treatment before and after the interruption of dental care. Material and Methods: the retrospective longitudinal study consisted of 273 participants undergoing Dental Clinic of the AACD (Disabled Child Assistance Association), divided into three groups according to age: Group 1 (G1: 0 to 5 years and 11 months; n=137), Group 2 (G2: 6 to 11 years and 11 months; n=85) and Group 3 (G3: 12 to 17 years and 11 months; n=51). Sociodemographic, data, clinical pattern of cerebral palsy and use of medication were collected, evaluating the gingival condition by the gingival index and the type of dental treatment before the pandemic and during, nine months after the interruption of dental care. Chi-square, Fisher Exact and Kruskal-Wallis (a = 5%) tests were used. Results: the groups were homogeneous in terms of sex (p=0.4581), race (p=0.1725), clinical pattern (p=0.3482) and use of antiepileptic drugs (p=0.3509). Regarding the gingival condition, in the period during the pandemic, there was a reduction in the number of participants with Gingival Index scores 0 and 1 and an increase in participants with scores 2 and 3 (p<0.05). As for the procedures performed, the three groups showed a reduction in preventive procedures (p<0.05) and an increase in surgical, periodontal and restorative procedures (p<0.05). Conclusion: it is concluded that the interruption of dental care for nine months during the COVID-19 pandemic in children and adolescents with cerebral palsy had a negative impact on oral health. KEYWORDS COVID-19; Caregivers; Gingivitis; Oral health; Cerebral palsy.","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135912921","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}
Basima Gh. Ali, Hadeel Mazin Akram, Sarah A. Abed, Farah Sabah Rasheed
Aloe Vera, a perennial Liliaceae plant, has medical, cosmetic, and wound-healing properties. Aloe vera has antioxidant, anti-cancer, anti-diabetic, and regenerative effects. Glucommannan increases collagen synthesis and aids healing after ginivectomy treatment. Natural mouthwashes may offer gingival wound healing efficacy with reduced side-effects when compared to Chlorhexidine. Objective: the objective of this clinical study was to compare the effects on wound healing of a one-week Aloe vera mouthwash with chlorhexidine mouthwash before gingivectomy surgical therapy. Material and Methods: a total of 45 individuals experiencing inflammatory gingival enlargement were included in the study. They underwent professional mechanical plaque removal and were then randomly divided into three groups. In group I, comprising 15 patients, participants were advised to utilize 100% Aloe vera juice as a mouthwash twice daily. Group II, also consisting of 15 patients, was instructed to use Chlorhexidine (0.2%) mouthwash twice daily. The Control group, which consisted of 15 patients, was recommended to use a placebo mouth rinse in addition to mechanical plaque removal. During the second visit, which occurred one week after the initial visit, the enlarged gingival tissue was surgically removed through scalpel gingivectomy. Immunohistochemical (IHC) analysis was performed on the excised tissue to measure the levels of fibroblast growth factor-2. Results: when compared to the control group, Aloe vera showed significant differences regarding the expression of fibroblast growth factor-2(FGF-2), and highly significant differences in angiogenesis. At the same time, there were substantial differences in angiogenesis with no significant differences in the expression of FGF2 between Chlorhexidine and control groups. Conclusion: aloe vera has exhibited potential wound-healing effects as it significantly affected the IHC expression of FGF2 and angiogenesis when used as an adjunct to plaque control before gingivectomy surgical therapy. KEYWORDS Aloe-vera; Fibroblast growth factor-2; Gingival overgrowth; Chlorhexidine; Mouthwash.
{"title":"Wound healing effect of a one-week Aloe Vera mouthwash: a pilot study","authors":"Basima Gh. Ali, Hadeel Mazin Akram, Sarah A. Abed, Farah Sabah Rasheed","doi":"10.4322/bds.2023.e3853","DOIUrl":"https://doi.org/10.4322/bds.2023.e3853","url":null,"abstract":"Aloe Vera, a perennial Liliaceae plant, has medical, cosmetic, and wound-healing properties. Aloe vera has antioxidant, anti-cancer, anti-diabetic, and regenerative effects. Glucommannan increases collagen synthesis and aids healing after ginivectomy treatment. Natural mouthwashes may offer gingival wound healing efficacy with reduced side-effects when compared to Chlorhexidine. Objective: the objective of this clinical study was to compare the effects on wound healing of a one-week Aloe vera mouthwash with chlorhexidine mouthwash before gingivectomy surgical therapy. Material and Methods: a total of 45 individuals experiencing inflammatory gingival enlargement were included in the study. They underwent professional mechanical plaque removal and were then randomly divided into three groups. In group I, comprising 15 patients, participants were advised to utilize 100% Aloe vera juice as a mouthwash twice daily. Group II, also consisting of 15 patients, was instructed to use Chlorhexidine (0.2%) mouthwash twice daily. The Control group, which consisted of 15 patients, was recommended to use a placebo mouth rinse in addition to mechanical plaque removal. During the second visit, which occurred one week after the initial visit, the enlarged gingival tissue was surgically removed through scalpel gingivectomy. Immunohistochemical (IHC) analysis was performed on the excised tissue to measure the levels of fibroblast growth factor-2. Results: when compared to the control group, Aloe vera showed significant differences regarding the expression of fibroblast growth factor-2(FGF-2), and highly significant differences in angiogenesis. At the same time, there were substantial differences in angiogenesis with no significant differences in the expression of FGF2 between Chlorhexidine and control groups. Conclusion: aloe vera has exhibited potential wound-healing effects as it significantly affected the IHC expression of FGF2 and angiogenesis when used as an adjunct to plaque control before gingivectomy surgical therapy. KEYWORDS Aloe-vera; Fibroblast growth factor-2; Gingival overgrowth; Chlorhexidine; Mouthwash.","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135914624","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}
S. S. I. Oliveira, Juliana Ignacio de Oliveira, M. L. Frigério, D. Laganá
{"title":"Quality of life assessment in patients with temporomandibular disorder with stabilization splints and home therapeutic exercises: a randomized clinical trial","authors":"S. S. I. Oliveira, Juliana Ignacio de Oliveira, M. L. Frigério, D. Laganá","doi":"10.4322/bds.2023.e3669","DOIUrl":"https://doi.org/10.4322/bds.2023.e3669","url":null,"abstract":"","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85274723","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}
Afra Rashid Saeed Ali Almheiri, T. Elsewify, B. Eid
Objective: The aim of this study was to evaluate the effect of different glide path files on the amount of apically extruded debris. Material and Methods: Sixty single-canaled mandibular premolars were accessed and randomly divided into three groups (n= 20) according to the file used for glid path creation; group A using Traverse file, group B using WaveOne Gold Glider, group C using stainless steel K file. All teeth were then instrumented using the Reciproc system. The debris extruded apically during instrumentation were collected into pre-weighed Eppendorf tubes which were then stored in an incubator at 70 °C for 5 days. The weight of the dry extruded debris was established by subtracting the pre-instrumentation and post-instrumentation weights of the Eppendorf tubes. The data were analyzed using one-way ANOVA test, and post hoc analysis. Results: WaveOne Gold Glider produced the least amount of apical extruded debris (0.41±0.25) followed by the Traverse group (0.59±0.20) then the K-file group (0.64±0.16) with a statistically significant difference (p=0.003). Conclusion: Apical extrusion of debris is inevitable during root canal cleaning and shaping. Creation of glide path using engine-driven files produces less amount of apically extruded debris compared to hand-driven K-files.
{"title":"Influence of traverse and waveone gold glider glide path files on the amount of\u0000 apically extruded debris","authors":"Afra Rashid Saeed Ali Almheiri, T. Elsewify, B. Eid","doi":"10.4322/bds.2023.e3769","DOIUrl":"https://doi.org/10.4322/bds.2023.e3769","url":null,"abstract":"Objective: The aim of this study was to evaluate the effect of different glide path files on the amount of apically extruded debris. Material and Methods: Sixty single-canaled mandibular premolars were accessed and randomly divided into three groups (n= 20) according to the file used for glid path creation; group A using Traverse file, group B using WaveOne Gold Glider, group C using stainless steel K file. All teeth were then instrumented using the Reciproc system. The debris extruded apically during instrumentation were collected into pre-weighed Eppendorf tubes which were then stored in an incubator at 70 °C for 5 days. The weight of the dry extruded debris was established by subtracting the pre-instrumentation and post-instrumentation weights of the Eppendorf tubes. The data were analyzed using one-way ANOVA test, and post hoc analysis. Results: WaveOne Gold Glider produced the least amount of apical extruded debris (0.41±0.25) followed by the Traverse group (0.59±0.20) then the K-file group (0.64±0.16) with a statistically significant difference (p=0.003). Conclusion: Apical extrusion of debris is inevitable during root canal cleaning and shaping. Creation of glide path using engine-driven files produces less amount of apically extruded debris compared to hand-driven K-files.","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75866140","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}
J. M. F. Silva, J. Lisboa, F. Z. Pierre, R. Araújo, C. Lemos, R. Cruz, F. Verri
{"title":"Stress distribution in lower second molar mesialization using mini-implants: a pilot study using 3D finite element analysis","authors":"J. M. F. Silva, J. Lisboa, F. Z. Pierre, R. Araújo, C. Lemos, R. Cruz, F. Verri","doi":"10.4322/bds.2023.e3485","DOIUrl":"https://doi.org/10.4322/bds.2023.e3485","url":null,"abstract":"","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72567729","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}
Taina da Silva Tricoly, Camila Lopes Ferreira, Victória Clara da Silva Lima, Andrea Carvalho De Marco, Taciana Marco Ferraz Caneppele, M. Jardini
{"title":"Is the use of Lactobacillus reuteri probiotic efficient as adjunctive therapy in the treatment of periodontitis? A systematic review","authors":"Taina da Silva Tricoly, Camila Lopes Ferreira, Victória Clara da Silva Lima, Andrea Carvalho De Marco, Taciana Marco Ferraz Caneppele, M. Jardini","doi":"10.4322/bds.2023.e3619","DOIUrl":"https://doi.org/10.4322/bds.2023.e3619","url":null,"abstract":"","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73669889","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 aims to compare the strain induced in the supporting structures of unilateral mandibular removable partial denture frameworks retained by extra-coronal attachments fabricated with three different materials. Material and Methods: Three mandibular class II digitally designed and printed acrylic models with detachable abutments were used to fabricate three removable partial denture framework with extra coronal attachments from three different materials. A total of 33 models were prepared for strain testing (n=11). Models were divided into three groups according to framework’s material: porcelain fused to cobalt chromium (PFM), polyetherketoneketone (PEKK) and polyetheretherketone (PEEK) group. Unilateral load of 60 N was applied in the three groups and strains were measured around the main abutment and saddle area using strain gauge. Results: Statistical analysis was performed using Shapiro-Wilk’s test and by checking data distribution. Data were found to be non-parametric and were analysed using Kruskal-Wallis test followed by Dunn’s post hoc test with Bonferroni correction. PFM group showed significantly the highest strain values around abutment, slot 1 (1mm distal to the socket of the last abutment) and slot 2 (1 cm away from slot 1) respectively (843.00±23.08, 91.00±6.52 and 1274.00±65.71) than the other tested groups (p<0.05) at same tested sites respectively followed by PEKK group (384.00±37.48, 81.00±2.24 and 135.00±0.00) and PEEK group (29.00±4.18, 63.00±4.47 and 52.00±5.70). Conclusions: PEEK and PEKK for partial denture framework with extra coronal attachments are adequate alternative to PFM due to their good mechanical response applying less strain on supportive structures in free-end cases. PEEK induces lower strain magnitude on the supporting structures when compared to PEKK.
{"title":"The effect of different framework s material on strain induced in distal abutment in mandibular Kennedy s class II: an in-vitro study","authors":"Noha Mohamed EL Hussieny Fayad, Dina Bahig","doi":"10.4322/bds.2023.e3775","DOIUrl":"https://doi.org/10.4322/bds.2023.e3775","url":null,"abstract":"Objective: This study aims to compare the strain induced in the supporting structures of unilateral mandibular removable partial denture frameworks retained by extra-coronal attachments fabricated with three different materials. Material and Methods: Three mandibular class II digitally designed and printed acrylic models with detachable abutments were used to fabricate three removable partial denture framework with extra coronal attachments from three different materials. A total of 33 models were prepared for strain testing (n=11). Models were divided into three groups according to framework’s material: porcelain fused to cobalt chromium (PFM), polyetherketoneketone (PEKK) and polyetheretherketone (PEEK) group. Unilateral load of 60 N was applied in the three groups and strains were measured around the main abutment and saddle area using strain gauge. Results: Statistical analysis was performed using Shapiro-Wilk’s test and by checking data distribution. Data were found to be non-parametric and were analysed using Kruskal-Wallis test followed by Dunn’s post hoc test with Bonferroni correction. PFM group showed significantly the highest strain values around abutment, slot 1 (1mm distal to the socket of the last abutment) and slot 2 (1 cm away from slot 1) respectively (843.00±23.08, 91.00±6.52 and 1274.00±65.71) than the other tested groups (p<0.05) at same tested sites respectively followed by PEKK group (384.00±37.48, 81.00±2.24 and 135.00±0.00) and PEEK group (29.00±4.18, 63.00±4.47 and 52.00±5.70). Conclusions: PEEK and PEKK for partial denture framework with extra coronal attachments are adequate alternative to PFM due to their good mechanical response applying less strain on supportive structures in free-end cases. PEEK induces lower strain magnitude on the supporting structures when compared to PEKK.","PeriodicalId":37577,"journal":{"name":"Brazilian Dental Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74646355","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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