ABSTRACT
OBJECTIVE: This study compared the shaping ability of TRUShape and XP-endo Shaper systems on C-shaped root canals replicas using microcomputed tomography (micro-CT). MATERIAL AND METHODS: Thirty three-dimensional replicas based on a mandibular second molar classified as C1 type I C-shaped canal were randomly divided into two groups (n = 15): TRUShape (G.TRU) and XP-endo Shaper (G.XP) and instrumented with each system according to the manufacturer's instructions. Changes in volume and surface and the unprepared area of the root canal were measured by scanning on micro-CT before and after instrumentation. RESULTS: The unprepared areas were 39% in the G.TRU and 43% in the G.XP group with no significant difference between them (p > 0.05), but both the tested systems left a high percentage of unprepared root canal walls of C-shaped root canals. CONCLUSION: TRUShape and XP-endo Shaper showed a high rate of unprepared areas with similar results after C-shaped root canals replicas for root canal preparation.
ABSTRACT
Cavernous hemangiomas are benign malformations of vascular origin, usually well circumscribed and slow to grow. These lesions can be asymptomatic, being discovered unintentionally in imaging exams or symptomatic, indicated mainly by the presence of proptosis, diplopia, and visual disturbances by optic nerve compression. The complementary exams involve computed tomography associated with contrast, color Doppler, magnetic resonance, and angiography. Treatment can be conservative or surgical depending on the case, and the open therapy usually involves lateral, supraorbital, transconjunctival, transantral, pterional, transnasal, and extradural endoscopic orbitotomy. The present study aimed to report a recurrent case of hemangioma in the orbital cavity signaled by ocular proptosis, hyperemia, and ocular pain.The lesion was achieved through the Weber-Ferguson access with zygomatic osteotomy and preservation of the infraorbital nerve. The excision of the lesion was performed, and the previously displaced fragments were fixed with 1.5 mm mini plates. The patient has a chance of progressing with visual impairment due to considerable manipulation of the optic nerve and is being followed up.The reported case showed a successful diagnosis and therapeutic conduct, remaining now in the evolution and follow-up scenario.
ABSTRACT
OBJECTIVE: The aim of present study was to assess the cytotoxicity and antimicrobial efficacy of 2% peracetic acid (PAA) compared with 5.25% sodium hypochlorite (NaOCl) and 2% chlorhexidine (CHX). MATERIAL AND METHODS: For the cytotoxicity test, 100 µl of the tested solutions were added in 12 wells with ECV 304 endothelial cells in each group: NaOCl, CHX, and PAA, in addition to the control group. Each solution was evaluated after 24 hours of contact in four dilutions: 0.2, 0.1, 0.05 and 0.025 through mitochondrial function using MTT colorimetric assay. In the antimicrobial evaluation, 40 dentin blocks 5 mm in length and 0.2 g in weight were incubated with 400 µl of Enterococcus faecalis suspension for 21 days at 37°C. The contaminated samples were divided into three experimental groups within 5 minutes of contact: NaOCl group, CHX group, PAA group, as well as the positive control group. The specimens received treatment and were transferred to a tube with saline for serial dilution of the solution and seeding for isolation and colony forming unit (CFU) count. STATISTICAL ANALYSIS: The results obtained were expressed as mean (A570 nm) ± standard deviation (SD) and in a multiple linear regression model and multiple comparisons conducted. RESULTS: The antimicrobial evaluation revealed that the NaOCl and CHX groups showed a statistically significant difference compared with the control group (p < 0.001), while the PAA reduced only the CFU growth. It can be concluded that, among the agents tested, PAA expressed greater cell viability, followed by CHX and NaOCl. However, it did not show greater antimicrobial activity in vitro in the mature biofilm of Enterococcus faecalis.
ABSTRACT
A resistência à tração diametral (TD) é um requisito essencial para o sucesso clínico das restaurações. Dessa forma, este estudo objetivou avaliar a resistência à TD de três tipos cimentos ionômero de vidro (CIV) em comparação com uma resina composta, todos utilizados em seis postos de saúde pública do município de Duque de Caxias/RJ. O TD foi realizado em uma máquina universal com uma célula de carga de 200 Kgf. Os valores médios de resistência à TD, em MPa, foram: 11,46 (CIV A), 10 (CIV B), 31 (CIV C) e 38,13 (Resina). Os resultados foram analisados pelos testes Anova e Turkey (p < 0,05). Concluiu-se que os CIVs apresentaram resistência à TD semelhante entre eles, porém inferior à resina, mas ainda sendo uma ótima opção para restauração preconizada pelo Serviço Público de Saúde (SUS).
The diametric tensile strength (DT) is a prerequisite for clinical success of restoration. Thus, this study aimed to evaluate the resistance of DT of three types of glass ionomer cements (IO) for restorative, and compare with a composite resin. Eight samples of each material were using by bipartite matrices. All of the materials were used according to manufacturers. The DT test was performed using a universal testing machine with a load of 200 kgf. The results were analyzed using Anova and Turkey (p <0.05). Mean values for resistance to DT in MPa were: 11.46 (IO A), 10 (IO B), 31 (IO C) and 38.13 (Resin composite). We concluded that IO showed similar DT among themselves.
Subject(s)
Tensile Strength , In Vitro Techniques , Composite Resins , Dental Materials , Glass Ionomer CementsABSTRACT
A resistência à tração diametral (TD) é um requisito essencial para o sucesso clínico das restaurações. Dessa forma, este estudo objetivou avaliar a resistência à TD de três tipos cimentos ionômero de vidro (CIV) em comparação com uma resina composta, todos utilizados em seis postos de saúde pública do município de Duque de Caxias/RJ. O TD foi realizado em uma máquina universal com uma célula de carga de 200 Kgf. Os valores médios de resistência à TD, em MPa, foram: 11,46 (CIV A), 10 (CIV B), 31 (CIV C) e 38,13 (Resina). Os resultados foram analisados pelos testes Anova e Turkey (p < 0,05). Concluiu-se que os CIVs apresentaram resistência à TD semelhante entre eles, porém inferior à resina, mas ainda sendo uma ótima opção para restauração preconizada pelo Serviço Público de Saúde (SUS).
The diametric tensile strength (DT) is a prerequisite for clinical success of restoration. Thus, this study aimed to evaluate the resistance of DT of three types of glass ionomer cements (IO) for restorative, and compare with a composite resin. Eight samples of each material were using by bipartite matrices. All of the materials were used according to manufacturers. The DT test was performed using a universal testing machine with a load of 200 kgf. The results were analyzed using Anova and Turkey (p <0.05). Mean values for resistance to DT in MPa were: 11.46 (IO A), 10 (IO B), 31 (IO C) and 38.13 (Resin composite). We concluded that IO showed similar DT among themselves.
