The Experts below are selected from a list of 405 Experts worldwide ranked by ideXlab platform
A C R Tanner - One of the best experts on this subject based on the ideXlab platform.
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aciduric microbiota and mutans streptococci in severe and recurrent severe early childhood caries
Pediatric Dentistry, 2012Co-Authors: Christopher V Hughes, Mohammed Dahlan, Eleftheria Papadopolou, Shulin C Lu, Jennifer M J Mathney, Alexandra Bravoco, Ralph Kent, N. Pradhan, A C R TannerAbstract:PURPOSE: Severe early childhood caries (ECC) results from bacterial acid production in an acidic environment. The purpose of this study was to determine Streptococcus mutans, Streptococcus sobrinus, and acid-tolerant counts in severe early childhood caries. METHODS: Two- to 6-year-olds with severe-ECC (N=77) or who were caries-free (N=40) were examined. Plaque samples from teeth and the tongue were cultured anaerobically on blood, acid, and S. mutans selective agars. Severe-ECC children were monitored post-treatment for recurrent caries. RESULTS: Severe-ECC and caries-free children were balanced by household income and education level. Carious lesions were observed in 75% maxillary incisors and >80% molars in severe-ECC. At baseline, S. mutans, and S. sobrinus counts and proportions of S mutans were higher in severe-ECC than caries-free children. Acid and blood counts were elevated only in anterior samples of severe-ECC children. Baseline counts of S. sobrinus, but not S. mutans, were higher in children with recurrent compared with no recurrent caries. S. mutans counts were lower following treatment than pretreatment, particularly for children without caries recurrence. Other counts did not differ between before and after therapy. CONCLUSIONS: Severe and recurrent early childhood caries was better explained by mutans streptococci than the aciduric microbiota. Streptococcus mutans did not predict children with recurrent caries.
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aciduric microbiota and mutans streptococci in severe and recurrent severe early childhood caries
Pediatric Dentistry, 2012Co-Authors: Christopher V Hughes, Mohammed Dahlan, Eleftheria Papadopolou, Shulin C Lu, Jennifer M J Mathney, Alexandra Bravoco, Ralph Kent, N. Pradhan, A C R TannerAbstract:PURPOSE: Severe early childhood caries (ECC) results from bacterial acid production in an acidic environment. The purpose of this study was to determine Streptococcus mutans, Streptococcus sobrinus, and acid-tolerant counts in severe early childhood caries. METHODS: Two- to 6-year-olds with severe-ECC (N=77) or who were caries-free (N=40) were examined. Plaque samples from teeth and the tongue were cultured anaerobically on blood, acid, and S. mutans selective agars. Severe-ECC children were monitored post-treatment for recurrent caries. RESULTS: Severe-ECC and caries-free children were balanced by household income and education level. Carious lesions were observed in 75% maxillary incisors and >80% molars in severe-ECC. At baseline, S. mutans, and S. sobrinus counts and proportions of S mutans were higher in severe-ECC than caries-free children. Acid and blood counts were elevated only in anterior samples of severe-ECC children. Baseline counts of S. sobrinus, but not S. mutans, were higher in children with recurrent compared with no recurrent caries. S. mutans counts were lower following treatment than pretreatment, particularly for children without caries recurrence. Other counts did not differ between before and after therapy. CONCLUSIONS: Severe and recurrent early childhood caries was better explained by mutans streptococci than the aciduric microbiota. Streptococcus mutans did not predict children with recurrent caries.
Christopher V Hughes - One of the best experts on this subject based on the ideXlab platform.
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aciduric microbiota and mutans streptococci in severe and recurrent severe early childhood caries
Pediatric Dentistry, 2012Co-Authors: Christopher V Hughes, Mohammed Dahlan, Eleftheria Papadopolou, Shulin C Lu, Jennifer M J Mathney, Alexandra Bravoco, Ralph Kent, N. Pradhan, A C R TannerAbstract:PURPOSE: Severe early childhood caries (ECC) results from bacterial acid production in an acidic environment. The purpose of this study was to determine Streptococcus mutans, Streptococcus sobrinus, and acid-tolerant counts in severe early childhood caries. METHODS: Two- to 6-year-olds with severe-ECC (N=77) or who were caries-free (N=40) were examined. Plaque samples from teeth and the tongue were cultured anaerobically on blood, acid, and S. mutans selective agars. Severe-ECC children were monitored post-treatment for recurrent caries. RESULTS: Severe-ECC and caries-free children were balanced by household income and education level. Carious lesions were observed in 75% maxillary incisors and >80% molars in severe-ECC. At baseline, S. mutans, and S. sobrinus counts and proportions of S mutans were higher in severe-ECC than caries-free children. Acid and blood counts were elevated only in anterior samples of severe-ECC children. Baseline counts of S. sobrinus, but not S. mutans, were higher in children with recurrent compared with no recurrent caries. S. mutans counts were lower following treatment than pretreatment, particularly for children without caries recurrence. Other counts did not differ between before and after therapy. CONCLUSIONS: Severe and recurrent early childhood caries was better explained by mutans streptococci than the aciduric microbiota. Streptococcus mutans did not predict children with recurrent caries.
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aciduric microbiota and mutans streptococci in severe and recurrent severe early childhood caries
Pediatric Dentistry, 2012Co-Authors: Christopher V Hughes, Mohammed Dahlan, Eleftheria Papadopolou, Shulin C Lu, Jennifer M J Mathney, Alexandra Bravoco, Ralph Kent, N. Pradhan, A C R TannerAbstract:PURPOSE: Severe early childhood caries (ECC) results from bacterial acid production in an acidic environment. The purpose of this study was to determine Streptococcus mutans, Streptococcus sobrinus, and acid-tolerant counts in severe early childhood caries. METHODS: Two- to 6-year-olds with severe-ECC (N=77) or who were caries-free (N=40) were examined. Plaque samples from teeth and the tongue were cultured anaerobically on blood, acid, and S. mutans selective agars. Severe-ECC children were monitored post-treatment for recurrent caries. RESULTS: Severe-ECC and caries-free children were balanced by household income and education level. Carious lesions were observed in 75% maxillary incisors and >80% molars in severe-ECC. At baseline, S. mutans, and S. sobrinus counts and proportions of S mutans were higher in severe-ECC than caries-free children. Acid and blood counts were elevated only in anterior samples of severe-ECC children. Baseline counts of S. sobrinus, but not S. mutans, were higher in children with recurrent compared with no recurrent caries. S. mutans counts were lower following treatment than pretreatment, particularly for children without caries recurrence. Other counts did not differ between before and after therapy. CONCLUSIONS: Severe and recurrent early childhood caries was better explained by mutans streptococci than the aciduric microbiota. Streptococcus mutans did not predict children with recurrent caries.
L U Zhanmin - One of the best experts on this subject based on the ideXlab platform.
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effect of silver diamine fluoride and sodium fluoride varnish in trea tment of caries of primary teeth
Chinese Journal of Conservative Dentistry, 2003Co-Authors: L U ZhanminAbstract:AIM:To investigate the effect of silver di am ine fluoride and sodium fluoride varnish in treatment of dental caries of primar y teeth. METHODS: 375 3-5 year-old children with carious uppe r anterior teeth were randomly divided into five groups. They received removal o f soft carious tissues and annual applications of silver diamine fluoride soluti on, annual applications of silver diamine fluoride solution, removal of soft car ious tissues and applications of NaF varnish every three months, applications of NaF varnish every three months, and application of water respectively. RESULTS: The results of 24 months showed that the mean numbers of arr ested caries tooth surfaces in five groups were 3.52, 3.54, 1.93, 1.95 and 1.67 respectively (P0.001). CONCLSUION: Annual application of silver diamine fluoride solution is effective in arresting dental caries in pri mary anterior teeth. Carious removal prior to the fluoride treatments has no sig nificant effect on their ability to arrest dental caries.
Aline De Almeida Neves - One of the best experts on this subject based on the ideXlab platform.
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sealing carious fissures with resin infiltrant in association with a flowable composite reduces immediate microleakage
Pesquisa Brasileira em Odontopediatria e Clínica Integrada, 2020Co-Authors: Vanessa Brigido Da Silva, Raquel Nogueira De Carvalho, Tamiris Gomes Bergstrom, Thais Maria Pires Dos Santos, R T Lopes, Aline De Almeida NevesAbstract:Objective: To compare the immediate microleakage of carious fissures sealed with a caries infiltrant covered by a flowable composite or solely with a flowable composite. Material and Methods: Extracted carious molars (n=20) were selected and paired among the experimental groups according to caries progression scores. Experimental groups (n=10) were divided according to the following sealing techniques: 1) caries infiltrant (Icon) + flowable composite (Z350 flow); 2) flowable composite (Z350 flow). Specimens were immersed in 3% methylene blue and evaluated in a stereomicroscope. Microleakage scores were attributed independently by two calibrated evaluators and the mode value was considered as the mean for the specimen. Binomial tests were used to test differences between two independent sample proportions at 5% significance level . Results: In the flowable composite group, a higher prevalence of dye penetration along the full depth of the fissure was observed, compared with caries infiltrant + flowable composite (p<0.05). For specimens showing dye penetration up to half of the fissure, in caries infiltrant + flowable composite group, all specimens showed dye penetration into the sealant, but not over the infiltrant . Conclusion: Using caries infiltrant as sealing material under a flowable composite cover is effective to improve the immediate sealing ability in carious fissures compared to sealing with flowable composite.
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Sealing Carious Fissures with Resin Infiltrant in Association with a Flowable Composite Reduces Immediate Microleakage
Pesquisa Brasileira em Odontopediatria e Clínica Integrada, 2020Co-Authors: Vanessa Brigido Da Silva, Raquel Nogueira De Carvalho, Tamiris Gomes Bergstrom, Thais Maria Pires Dos Santos, R T Lopes, Aline De Almeida NevesAbstract:Objective: To compare the immediate microleakage of carious fissures sealed with a caries infiltrant covered by a flowable composite or solely with a flowable composite. Material and Methods: Extracted carious molars (n=20) were selected and paired among the experimental groups according to caries progression scores. Experimental groups (n=10) were divided according to the following sealing techniques: 1) caries infiltrant (Icon) + flowable composite (Z350 flow); 2) flowable composite (Z350 flow). Specimens were immersed in 3% methylene blue and evaluated in a stereomicroscope. Microleakage scores were attributed independently by two calibrated evaluators and the mode value was considered as the mean for the specimen. Binomial tests were used to test differences between two independent sample proportions at 5% significance level . Results: In the flowable composite group, a higher prevalence of dye penetration along the full depth of the fissure was observed, compared with caries infiltrant + flowable composite (p
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micro tensile bond strength and interfacial characterization of an adhesive bonded to dentin prepared by contemporary caries excavation techniques
Dental Materials, 2011Co-Authors: Aline De Almeida Neves, Eduardo Coutinho, Marcio Vivan Cardoso, Jan De Munck, Bart Van MeerbeekAbstract:Abstract Objectives To evaluate the micro-tensile bond strength (μTBS) and interfacial characteristics of adhesive–dentin bonds produced after caries-removal with contemporary techniques. Methods Carious molars were cut at the base of the fissure, exposing ‘sound’ and ‘carious’ dentin at different spots. After caries-excavation, a composite was bonded using a 2-step self-etch adhesive. The μTBS was measured and the mode of fracture analyzed using a stereomicroscope and imaged by Feg-SEM, while additional non-fractured specimens were histologically analyzed after Masson's trichrome staining in order to identify potentially incompletely resin-enveloped collagen. Results μTBS to residual caries-excavated dentin was lower than to sound dentin. The different caries-removing techniques had a significant effect on the μTBS. Er:YAG laser guided by a LIF-feedback system (Kavo) resulted in the lowest μTBS (26.8% lower than to ‘sound’ dentin) and a distinct layer of incompletely resin-enveloped collagen at the interface. Although different degrees of collagen exposure were seen for other caries-removing techniques, such as a thick layer for CeraBur (Komet-Brasseler), some unprotected collagen areas for Cariex (Kavo), or completely resin-enveloped collagen for a tungsten-carbide-bur (Komet), the μTBS appeared not directly affected (10%, 16.6%, and 15.3% lower than to ‘sound’ dentin, respectively). Carisolv (MediTeam) resulted in the highest μTBS (only 1% reduction compared to that to ‘sound’ dentin), followed by the tungsten-carbide-bur aided by Caries Detector (Kuraray) (4.8% reduction). Enzymatic caries excavation using the experimental SFC-VIII (3M-ESPE) aided by a disposable plastic instrument resulted in a 19.4% reduction in μTBS as compared to that to ‘sound’ dentin. Significance The dentin bonding receptiveness depends to a large extent on the caries-excavation method employed.
Clemencia M Vargas - One of the best experts on this subject based on the ideXlab platform.
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current understanding of the epidemiology mechanisms and prevention of dental caries in preschool children
Pediatric Dentistry, 2002Co-Authors: Norman Tinanoff, Michael J Kanellis, Clemencia M VargasAbstract:The seriousness and societal costs of dental caries in preschool children are enormous. National data shows that caries is highly prevalent in poor and near poor US preschool children, yet this disease is infrequently treated. The etiology includes elevated colonization levels of mutans streptococci, high frequency sugar consumption, and developmental defects on primary teeth. A necessary first step in preventing dental caries in preschool children is evaluating the child’s caries risk factors that include socioeconomic status, previous carious experience, presence of white spot lesions, presence of visible plaque, perceived risk by dental professionals, and microbiologic testing for the presence or quantity of mutans streptococci. Based on this knowledge, different preventive strategies, as well as different intensities of preventive therapies, can be employed. Caries preventive strategies in preschool children include diet modifications to reduce high frequency sugar consumption, supervised tooth brushing with fluoridated dentifrice, systemic fluoride supplements to children living in a nonfluoridated area that are at risk for caries, professional topical fluoride with fluoride varnish, and sealants for primary molars.(Pediatr Dent. 2002;24:543-551)
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current understanding of the epidemiology mechanisms and prevention of dental caries in preschool children
Pediatric Dentistry, 2002Co-Authors: Norman Tinanoff, Michael J Kanellis, Clemencia M VargasAbstract:The seriousness and societal costs of dental caries in preschool children are enormous. National data shows that caries is highly prevalent in poor and near poor US preschool children, yet this disease is infrequently treated. The etiology includes elevated colonization levels of mutans streptococci, high frequency sugar consumption, and developmental defects on primary teeth. A necessary first step in preventing dental caries in preschool children is evaluating the child's caries risk factors that include socioeconomic status, previous carious experience, presence of white spot lesions, presence of visible plaque, perceived risk by dental professionals, and microbiologic testing for the presence or quantity of mutans streptococci. Based on this knowledge, different preventive strategies, as well as different intensities of preventive therapies, can be employed. Caries preventive strategies in preschool children include diet modifications to reduce high frequency sugar consumption, supervised tooth brushing with fluoridated dentifrice, systemic fluoride supplements to children living in a nonfluoridated area that are at risk for caries, professional topical fluoride with fluoride varnish, and sealants for primary molars.
