7 documents found, page 1 of 1
Tooth Discoloration after Regenerative Endodontic Procedures with Calcium Silic...
Palma, Paulo J.; Marques, Joana A.; Santos, Joana; Falacho, Rui I.; Sequeira, Diana B.; Diogo, Patrícia; Caramelo, Francisco; Ramos, João C.The aim of the present ex vivo study was to assess and compare coronal discoloration induced by four endodontic biomaterials used in regenerative endodontic procedures (REPs). Root resection was executed horizontally, 2 mm apical to the cementoenamel junction, in all fifty-four teeth. After accessing the pulp chamber, specimens were randomly divided in groups and filled with either saline solution or blood, fol...
Six-Month Color Stability Assessment of Two Calcium Silicate-Based Cements Used...
Palma, Paulo J.; Marques, Joana A.; Falacho, Rui I.; Correia, Eder; Vinagre, Alexandra; Santos, João Miguel; Ramos, João C.Aim: The purpose of the present study is to assess the color stability of two calcium silicate-based cements (CSCs) used in regenerative endodontic procedures (REPs). Methods: A total of 40 acrylic single-rooted transparent teeth, with immature apex, were used. Root canals were filled up to 3 mm below the level of the cementoenamel junction, with either saline solution (Mineral Trioxide Aggregate (MTA)/saline a...
Pulp Temperature Rise Induced by Light-Emitting Diode Light-Curing Units Using ...
Vinagre, Alexandra; Ramos, João C.; Rebelo, Clara; Basto, José Francisco; Messias, Ana; Alberto, Nélia; Nogueira, RogérioThe aim of this research was to compare the pulp temperature (PT) rise induced by four light-emitting diode light-curing units (LED LCUs) (Bluephase 20i, Demi Ultra, SPEC 3, and Valo) in different curing modes. Immediately after extraction, the pulp chamber of 11 premolars was accessed from the palatal cervical third of the crown for insertion of fiber Bragg grating (FBG) sensors for temperature measurement and...
Polymerization Shrinkage Evaluation of Restorative Resin-Based Composites Using...
Lins, Rodrigo; Vinagre, Alexandra; Alberto, Nélia; Domingues, Maria F.; Messias, Ana; Martins, Luís R.; Nogueira, Rogério; Ramos, João C.The purpose of this study was to compare the linear polymerization shrinkage of different restorative resin-based composites (RBCs) using fiber Bragg grating (FBG) sensors. Five RBCs were evaluated: Zirconfill® (ZFL); Aura Bulk-Fill (ABF); Tetric® N-Ceram Bulk-Fill (TBF); FiltekTM Bulk-Fill (FBF); and Admira Fusion-Ormocer® (ADF). Ten samples per resin were produced in standardized custom-made half-gutter silic...
Does Delayed Restoration Improve Shear Bond Strength of Different Restorative P...
Palma, Paulo J.; Marques, Joana A.; Falacho, Rui I.; Vinagre, Alexandra; Santos, João Miguel; Ramos, João C.The purpose of the present study was to assess the proper time to perform a restoration (immediately or delayed) after placement of two calcium silicate-based cements (CSCs) and to test the performance of two different restorative protocols regarding shear bond strength (SBS). Seventy-five acrylic blocks were randomly divided into five groups (n = 15). Specimens were filled with either ProRoot MTA (Dentsply Tul...
Does Delayed Restoration Improve Shear Bond Strength of Different Restorative P...
Palma, Paulo J.; Marques, Joana A.; Falacho, Rui I.; Vinagre, Alexandra; Santos, João Miguel; Ramos, João C.The purpose of the present study was to assess the proper time to perform a restoration (immediately or delayed) after placement of two calcium silicate-based cements (CSCs) and to test the performance of two different restorative protocols regarding shear bond strength (SBS). Seventy-five acrylic blocks were randomly divided into five groups (n = 15). Specimens were filled with either ProRoot MTA (Dentsply Tul...
“Healthy Life”: interaction of polyphenols with lipid bilayers and their effect...
Filipe, Hugo A. L.; Peneda, Catarina; Marquês, Joaquim T.; Machuqueiro, Miguel; Ramos, João C.; Santos, Maria da Soledade; Marinho, H. SusanaThis work concerns the transversal project of the CQB thematic line: “Healthy Life: Molecular Interventions and Regulation Mechanisms”. Biologically active plant phytochemicals have a broad range of pharmacological effects including anticarcinogenic, antimicrobial, antioxidant, and anti-inflammatory activity. [1] Notwithstanding the possibility of having a specific target, phytochemicals must interact and perme...