14 research outputs found
Assessing changes in oral health-related quality of life following dental rehabilitation under general anesthesia
This study determines the frequency and relationship between disk position and degenerative bone changes in temporomandibular joints in children and adolescent patients with internal derangement. Study design: TMJ, MRI of 88 patients were analyzed (average age: 14.7 years-old, range age: 10-18 years-old), female n=65 (73.9%) and male n=23 (26.1%). Images obtained were used to determine the frequency of disk position, joint effusion (JE) and degenerative bone changes (OA). Images were assessed by a calibrated radiologist (Kappa=0.82). Results: No significant association was found between disk displacement with reduction and degenerative bone changes (Chi2=9.894; OR= 0.375; p=0.0017), nor disk without displacement (Chi2=9.448; OR= 0.223; p=0.0021). A significant association was found between disk displacement without reduction and degenerative bone changes (Chi2=30.951; OR=6.304; p=0.0001). Conclusions: There is a significant association between disk displacement without reduction and degenerative bone changes (p=0.0001) in children and adolescent patients with TMD
Recovering Streptococcus mutans over restorations by the tray technique - A randomized clinical study
Aim: To correlate the tray technique for isolation and counting of Streptococcus mutans over
dental restoration with the toothpick technique. Methods: Forty 18-50-year-old patients of both
genders with high cariogenic risk were selected. Inclusion criteria were: occlusal restoration
evaluated as alpha, according to the Ryge’s criteria (examiner´ Cohen-Kappa 0.8) and 2
years old maximum age. Each patient provided a saliva sample (control group S) and two
samples of dental biofilm from amalgam or resin-based composite restorations in the same
patient, one obtained with the toothpick technique (group TT), and the other from homologous
tooth restoration with the tray technique (group TR). This method involves only a direct impression
on the occlusal surfaces by a section of a fluoride tray with trypticase yeast extract cysteine
sucrose with bacitracin (TYCSB) agar previously prepared and solidified. The samples were
incubated at 37 ºC for 48 h and the colony-forming units (CFU) were counted. The results were
statistically analyzed with SPSS software using the linear regression method at 95% confidence
level. Results: TR was able to isolate S. mutans, and there was a significant positive correlation
(r=0.95) with TT. There was no significant correlation between TR and control group S (r=0.47).
Conclusions: TR was able to isolate and count S. mutans from the dental biofilm of dental
restorations with a significant correlation with the TT group
Is there difference of Streptococcus mutans count and adherence on amalgam and resin occlusal restorations? A blind clinical study
Aim: To compare the number of colony forming units (CFU) and agar adherence of S. mutans on
amalgam (AM) and resin composite (RC) occlusal restorations. Sixty-five healthy patients older
than 18 years with high caries risk who had at least one occlusal AM and RC restorations (n=130)
were selected. Methods: The restorations were evaluated according to the alpha Ryge criteria
(Cohen-Kappa 0.8). For each patient, a biofilm sample was taken using an impression tray
technique with previously loaded with solid trypticase yeast extract cysteine sucrose with bacitracin
agar placed over the AM restorations and RC restorations in the same patients. The tray was
placed inside an oven at 37 °C for 48 h, and the S. mutans count was then performed. Data were
analyzed with the test Wilcoxon with a 95% confidence level. Results: RC restorations had
statistically significant higher number of CFU of S. mutans than AM restorations (p<0.05).
Conclusions: In adult patients with high caries risk, RC occlusal surfaces showed greater agar
adherence of S. mutans count than AM restorations
Recovering Streptococcus mutans over restorations by the tray technique: a randomized clinical study
AIM: To correlate the tray technique for isolation and counting of Streptococcus mutans over dental restoration with the toothpick technique. METHODS: Forty 18-50-year-old patients of both genders with high cariogenic risk were selected. Inclusion criteria were: occlusal restoration evaluated as alpha, according to the Ryge's criteria (examiner' Cohen-Kappa 0.8) and 2 years old maximum age. Each patient provided a saliva sample (control group S) and two samples of dental biofilm from amalgam or resin-based composite restorations in the same patient, one obtained with the toothpick technique (group TT), and the other from homologous tooth restoration with the tray technique (group TR). This method involves only a direct impression on the occlusal surfaces by a section of a fluoride tray with trypticase yeast extract cysteine sucrose with bacitracin (TYCSB) agar previously prepared and solidified. The samples were incubated at 37 ºC for 48 h and the colony-forming units (CFU) were counted. The results were statistically analyzed with SPSS software using the linear regression method at 95% confidence level. RESULTS: TR was able to isolate S. mutans, and there was a significant positive correlation (r=0.95) with TT. There was no significant correlation between TR and control group S (r=0.47). CONCLUSIONS: TR was able to isolate and count S. mutans from the dental biofilm of dental restorations with a significant correlation with the TT group.Conselho Nacional de Desenvolvimento CientÃfico e Tecnológico (CNPq
Indicators of the risk mechanics for Class-I and Class-II amalgam and composite resin restorations
determine indicators of prognosis for mechanical risks of amalgam and composite resin restorations in permanent teeth. Methods: Thirty-nine adult patients with direct clinical, photographic, radiographic and model examinations. A total of 256 restorations were classified as not satisfactory, with Bravo or Charlie values according to the modified Ryge /USPHS criteria. The total n was divided into Bravo and Charlie groups according to the value obtained in the marginal adaptation parameter. Each of the groups was sub-divided by the type of material (amalgam and composite resins) and the class: occlusal (O) and proximal (MOD). Results: Comparing the Bravo and Charlie groups, the statistically significant indicators were: the mesiodistal dimension (p=0.037), the distal isthmus (p<0.05), the average of the isthmuses (p<0.05), the distal (p<0.05) cavity depth, and the average depth of the MOD (p<0.05) cavities. It was concluded that the type and the class of the restoration are not indicators for sampling. Conclusions: With regard to the design of the cavity preparation, the valid mechanical risk indicators include the mesiodistal dimension, the distal isthmus, the average of the isthmuses, the depth of the distal cavity and the average depth of the MOD cavities. A simple clinical assessment does not provide sufficient information to establish the indicators for mechanical failure risk of restorations
Indicators of the risk mechanics for Class-I and Class-II amalgam and composite resin restorations
AIM: To determine indicators of prognosis for mechanical risks of amalgam and composite resin restorations in permanent teeth. METHODS: Thirty-nine adult patients with direct clinical, photographic, radiographic and model examinations. A total of 256 restorations were classified as "not satisfactory," with Bravo or Charlie values according to the modified Ryge /USPHS criteria. The total "n" was divided into Bravo and Charlie groups according to the value obtained in the "marginal adaptation" parameter. Each of the groups was sub-divided by the type of material (amalgam and composite resins) and the class: occlusal (O) and proximal (MOD). RESULTS : Comparing the Bravo and Charlie groups, the statistically significant indicators were: the mesiodistal dimension (p=0.037), the distal isthmus (p<0.05), the average of the isthmuses (p<0.05), the distal (p<0.05) cavity depth, and the average depth of the MOD (p<0.05) cavities. It was concluded that the type and the class of the restoration are not indicators for sampling. CONCLUSIONS: With regard to the design of the cavity preparation, the valid mechanical risk indicators include the mesiodistal dimension, the distal isthmus, the average of the isthmuses, the depth of the distal cavity and the average depth of the MOD cavities. A simple clinical assessment does not provide sufficient information to establish the indicators for mechanical failure risk of restorations.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento CientÃfico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de NÃvel Superior (CAPES
Recovering Streptococcus mutans over restorations by the tray technique - a randomized clinical study
Aim: To correlate the tray technique for isolation and counting of
Streptococcus mutans over dental restoration with the toothpick
technique. Methods: Forty 18-50-year-old patients of both genders with
high cariogenic risk were selected. Inclusion criteria were: occlusal
restoration evaluated as alpha, according to the Ryge’s criteria
(examiner´ Cohen-Kappa 0.8) and 2 years old maximum age. Each
patient provided a saliva sample (control group S) and two samples of
dental biofilm from amalgam or resin-based composite restorations in
the same patient, one obtained with the toothpick technique (group TT),
and the other from homologous tooth restoration with the tray technique
(group TR). This method involves only a direct impression on the
occlusal surfaces by a section of a fluoride tray with trypticase yeast
extract cysteine sucrose with bacitracin (TYCSB) agar previously
prepared and solidified. The samples were incubated at 37 ºC for
48 h and the colony-forming units (CFU) were counted. The results were
statistically analyzed with SPSS software using the linear regression
method at 95% confidence level. Results: TR was able to isolate S.
mutans, and there was a significant positive correlation (r=0.95) with
TT. There was no significant correlation between TR and control group S
(r=0.47). Conclusions: TR was able to isolate and count S. mutans from
the dental biofilm of dental restorations with a significant
correlation with the TT group
Recovering Streptococcus mutans over restorations by the tray technique - a randomized clinical study
correlate the tray technique for isolation and counting of Streptococcus mutans over dental restoration with the toothpick technique. Methods: Forty 18-50-year-old patients of both genders with high cariogenic risk were selected. Inclusion criteria were: occlusal restoration evaluated as alpha, according to the Ryges criteria (examiner´ Cohen-Kappa 0.8) and 2 years old maximum age. Each patient provided a saliva sample (control group S) and two samples of dental biofilm from amalgam or resin-based composite restorations in the same patient, one obtained with the toothpick technique (group TT), and the other from homologous tooth restoration with the tray technique (group TR). This method involves only a direct impression on the occlusal surfaces by a section of a fluoride tray with trypticase yeast extract cysteine sucrose with bacitracin (TYCSB) agar previously prepared and solidified. The samples were incubated at 37 ºC for 48 h and the colony-forming units (CFU) were counted. The results were statistically analyzed with SPSS software using the linear regression method at 95% confidence level. Results: TR was able to isolate S. mutans, and there was a significant positive correlation (r=0.95) with TT. There was no significant correlation between TR and control group S (r=0.47). Conclusions: TR was able to isolate and count S. mutans from the dental biofilm of dental restorations with a significant correlation with the TT group
Is there difference of Streptococcus mutans count and adherence on amalgam and resin occlusal restorations? A blind clinical study
compare the number of colony forming units (CFU) and agar adherence of S. mutans on amalgam (AM) and resin composite (RC) occlusal restorations. Sixty-five healthy patients older than 18 years with high caries risk who had at least one occlusal AM and RC restorations (n=130) were selected. Methods: The restorations were evaluated according to the alpha Ryge criteria (Cohen-Kappa 0.8). For each patient, a biofilm sample was taken using an impression tray technique with previously loaded with solid trypticase yeast extract cysteine sucrose with bacitracin agar placed over the AM restorations and RC restorations in the same patients. The tray was placed inside an oven at 37 °C for 48 h, and the S. mutans count was then performed. Data were analyzed with the test Wilcoxon with a 95% confidence level. Results: RC restorations had statistically significant higher number of CFU of S. mutans than AM restorations (p<0.05). Conclusions: In adult patients with high caries risk, RC occlusal surfaces showed greater agar
adherence of S. mutans count than AM restorations
Does refurbishing composites lead to short-term effects or long-lasting improvement?
ArtÃculo de publicación ISISin acceso a texto completoPurpose: To evaluate the clinical performance of refurbished resin composite restorations
compared to untreated (negative control) restorations over a period of 10 years. Methods: 26
subjects (having a total of 52 composite restorations) were recruited. All restorations in the
refurbished group showed clinical features rated bravo according to modified USPHS criteria.
Untreated restorations were those that had been deemed acceptable (alpha or bravo rated);
these were used as controls. Two examiners performed assessments at baseline and during
the 5th and 10th years after the intervention. Wilcoxon tests were performed for within-group
comparisons, Friedman tests were used for multiple within-group comparisons, and Mann
Whitney tests were used for between-groups comparisons. Kaplan-Meier survival curves were
calculated, and the Mantel-Cox test was used to compare curves. P < 0.05 was considered
statistically significant. Results: In both groups, 10-year scores were significantly different from
baseline scores in all clinical parameters except secondary caries. There were no statistically
significant differences in the survival analysis of groups (log-rank test, P = 0.376). Refurbishing
treatment improved the anatomy, roughness, luster, and marginal adaptation of restorations
with a short term effect, with most properties rated acceptable after 10 years of clinical service.
The clinical characteristics were similar for all groups at the 10th year