ABSTRACT
The aim of the present study was to evaluate the effect of calcium hydroxide dressing on the bond strength of three commercially available endodontic sealers (MTA Fillapex, Sealapex, and AH Plus) to root canal dentin. Sixty slices of extracted human canines were obtained from cervical, middle, and apical root thirds. Root canals were standardized and specimens were filled and divided into six groups (n = 10): G1, MTA Fillapex; G2, Sealapex; and G3, AH Plus, with prior application of calcium hydroxide dressing; and G4, G5 and G6, without prior application of intracanal dressing. After 7 days, specimens were submitted to a push-out test. The data obtained were analyzed using the ANOVA and Tukey tests (α = 5%). Fracture modes were classified as adhesive, cohesive or mixed. The results of sealer bond strength to root canal dentin varied according to the sealer, root third and prior dressing application. Overall, calcium hydroxide dressing reduced bond strength in all root thirds, but the reduction was significant only for AH Plus, at the cervical (3.25 ± 1.69) and apical (4.43 ± 1.65) thirds (p < 0.05). AH Plus showed the highest bond strength for all root thirds (p < 0.05) compared to the other groups. G1, G2, G4 and G5 showed similar bond strength values for all root thirds (p > 0.05). In conclusion, the calcium hydroxide dressing only had a negative effect on the bond strength of AH Plus, at the cervical and apical thirds. On the other hand, the bond strength values for MTA Fillapex and Sealapex were lower than those for AH Plus and, whereas the mixed failure mode predominated for AH Plus, the adhesive failure mode predominated for MTA Fillapex and Sealapex.
Subject(s)
Bone Cements/chemistry , Calcium Hydroxide/chemistry , Dental Bonding/methods , Dental Pulp Cavity/drug effects , Dentin/drug effects , Root Canal Filling Materials/chemistry , Aluminum Compounds/chemistry , Analysis of Variance , Calcium Compounds/chemistry , Dental Restoration Failure , Drug Combinations , Epoxy Resins/chemistry , Humans , Materials Testing , Oxides/chemistry , Reference Values , Reproducibility of Results , Root Canal Preparation/methods , Salicylates/chemistry , Silicates/chemistry , Surface Properties , Time FactorsABSTRACT
INTRODUCTION: The aim of this study was to evaluate the ability of Resilon (Resilon Research, LLC, North Branford, CT) and 2 types of gutta-percha to fill simulated lateral canals when using the Obtura II system (Model 823-700; Obtura Spartan, Fenton, MO). METHODS: Forty-five human single-rooted teeth were selected and subjected to root canal preparation. After that, simulated lateral canals were made at 2, 5, and 8 mm from the working length (WL). The specimens were divided into 3 groups (n = 15) according to the filling material used: Obtura Flow 150 gutta-percha (Obtura flow), Odous Endo Flow gutta-percha (Odous; Odous De Deus Ind e Com. Ltda Belo Horizonte, MG, Brazil), and Resilon pellets (Resilon). Root canals were filled using the Obtura II system with the tip inserted to 3 mm from the WL. No sealer was used for root canal obturation. Specimens were subjected to a tooth decalcification and clearing method, and filling of the lateral canals was analyzed by digital radiography and photographs. The measurement of lateral canal filling was done using Image Tool software (UTHSCSA Image Tool for Windows version 3.0, San Antonio, TX). Data were statistically analyzed with the Kruskal-Wallis test at 5% significance. RESULTS: All materials showed an ability to penetrate into the simulated lateral canals, with a minimum percentage of 73% in all thirds of the root canal. CONCLUSIONS: It was concluded that gutta-percha and Resilon are solid core materials with a lateral canal filling ability when used with the Obtura II system.
Subject(s)
Gutta-Percha/chemistry , Root Canal Filling Materials/chemistry , Root Canal Obturation/methods , Dental Pulp Cavity/anatomy & histology , Histocytological Preparation Techniques , Humans , Image Processing, Computer-Assisted/methods , Materials Testing , Photography/methods , Radiography, Dental, Digital/methods , Root Canal Preparation/instrumentation , Root Canal Preparation/methods , Surface Properties , Tooth Apex/anatomy & histologyABSTRACT
It's related the occurence of rare case of abscess ano-rectal which is localized anterior the anus simulating Bartholin's Abscess that was drained by the third part inferior of the right of the vulva. The diagnosis was established by Metylene Blue in infection though vulvar orifice at the time when bartolinectomy was being considered. the analysis of this case is important in order to enphosize the proctologic background in Bartholin's Abscess case wainlly if there is prolonged drainage over ten days. We consider the elements of the differential diagnosis and the behaviour of the gynecologyst in those cases