Jorge N. R. Martins

Beyond the Surface: Engineered Nanocoating Reshapes NiTi Instrument Behaviour—A Laboratory Study

Jorge N. R. Martins, Emmanuel João Nogueira Leal Silva, Filipa Neto, Víctor Talarico Leal Vieira et autres

AIM: To compare the geometric and metallurgical features and mechanical performance of two contemporary reciprocating nickel-titanium instruments manufactured with and without additional engineered nanocoating technology. METHODOLOGY: Excalibur (n = 57) and Excalibur Pro (n = 57) size 25/0.05 instruments were evaluated. Geometric …

pt, br, bg, de, ru (code pays fourni par la source)

Electrochemical and Surface Characterization of Nickel-Containing Orthodontic Archwires Under In Vitro and In Vivo Conditions

Angelina Stoyanova-Ivanova, Velizar Georgiev, Petar Lilov, Тодор Влахов et autres

Objectives: To evaluate the corrosion behavior and surface characteristics of four nickel-containing orthodontic archwires (stainless steel (SS), superelastic nickel–titanium (NiTi), copper–nickel–titanium (CuNiTi), and multiforce NiTi) under unused, in vitro artificial saliva-immersed, and clinically used (in vivo) conditions. Methods: Rectangular SS, NiTi, CuNiTi, …

bg, pt (code pays fourni par la source)

Multimethod Evaluation of the Novel Reciproc Minima System: Geometric Design, Mechanical Performance, and Irrigation Dynamics

Emmanuel João Nogueira Leal Silva, Jorge N. R. Martins, Victor T. L. Vieira, Mário Rito Pereira et autres

Objectives: To compare the geometric design, metallurgical properties, mechanical performance, and irrigation dynamics of Reciproc Minima (M20 and M25) and Reciproc Blue R25 instruments. Methods: One hundred and eighty instruments (n = 60/group) were evaluated. Geometry was analyzed using stereomicroscopy, scanning electron …

br, pt (code pays fourni par la source)

#026 Separação de instrumento durante um retratamento endodôntico: decisão e abordagem clínica

Nuno R. dos Santos, Ana Marques, Joana Carvalho, Isabel Vasconcelos et autres

Introdução: As anomalias de esmalte abrangem várias alterações do normal desenvolvimento do esmalte dentário, com diferentes etiologias e com repercussões clínicas distintas.O seu correto diagnóstico permite encontrar a melhor abordagem terapêutica para cada caso.No setor anterior, o comprometimento estético é uma das …

pt (code pays fourni par la source)

#028 Abordagem Clínica de Lesão Endo-Periodontal de Segundo Molar Inferior

Joana Carvalho, Ana Marques, Nuno R. dos Santos, Sofia Tello Furtado et autres

Introdução: O retratamento endodôntico não cirúrgico consiste numa abordagem conservadora, contudo, determinados fatores podem comprometer o seu prognóstico, criando desafios no planeamento e realização do tratamento.Este caso clínico apresenta uma abordagem de retratamento num dente com perfuração radicular e extensa perda óssea …

pt (code pays fourni par la source)

Insights into Volume 66, Issue 3, 2025 of the Portuguese Journal of Stomatology, Dental Medicine and Maxillofacial Surgery

Jorge N. R. Martins, Jaime Portugal

Integrated Micro-Computed Tomography and Computational Fluid Dynamics Analysis of Stepwise Enlargement in Mesial Root Canals of Mandibular Molars

Sofia Furtado, Jorge N. R. Martins, Emmanuel João Nogueira Leal Silva, Mário Rito Pereira et autres

INTRODUCTION: To evaluate how stepwise enlargement in the mesial root canals of mandibular first molars affect shaping outcomes and irrigant dynamics. METHODS: The shaping ability and irrigant flow patterns in mesial canals of mandibular first molars enlarged with ProTaper Next instruments (25/.06v, …

pt, br (code pays fourni par la source)

The Cost of Instrument Retrieval on the Root Integrity

Marco Aurélio VERSIANI, H. V. Rasika Dias, Emmanuel João Nogueira Leal Silva, Felipe Gonçalves Belladonna et autres

AIM: To evaluate dentine loss in mesial canals of mandibular molars following instrument fragment retrieval using two techniques. METHODOLOGY: Ten mesial roots of mandibular molars with Type II configuration were selected and scanned in a micro-computed tomography (CT) device. After canal preparation, …

br, pt (code pays fourni par la source)

Characterising 12 NiTi Reciprocating Systems: An Integrative Laboratorial Analysis of Design, Mechanics, Metallurgy, Fluid Dynamics and Finite Element Analysis

Jorge N. R. Martins, Emmanuel João Nogueira Leal Silva, Mário Rito Pereira, Duarte Marques et autres

AIM: To comprehensively compare 12 nickel-titanium (NiTi) reciprocating single-file systems from eight manufacturers by integrating geometric, mechanical, metallurgical and in silico analyses. METHODOLOGY: A total of 276 NiTi reciprocating instruments, representing 12 types across 8 brands, were selected, including Easy-File Flex Regular …

pt, br, ae (code pays fourni par la source)

Mechanical and Metallurgical In Vitro Evaluation of Electropolished Versus Non‐Electropolished Rotary and Reciprocating Instruments

Víctor Talarico Leal Vieira, Emmanuel João Nogueira Leal Silva, Jorge N. R. Martins, Alejandro Jaime et autres

AIM: To evaluate the effect of electropolishing on the mechanical properties of One RECI and One Curve mini nickel-titanium (NiTi) instruments by comparing electropolished and non-electropolished versions of each instrument type. METHODOLOGY: Electropolished and non-electropolished One RECI (reciprocating) and One Curve mini …

br, pt, ar (code pays fourni par la source)

Dens Invaginatus: A Comprehensive Review of Classification and Clinical Approaches

Abayomi Baruwa, Craig S. Anderson, Adam Monroe, Flávia Cracel Nogueira et autres

Dens invaginatus is a developmental dental anomaly characterized by the infolding of the enamel organ into the dental papilla during early odontogenesis. This process leads to a broad spectrum of anatomical variations, ranging from minor enamel-lined pits confined to the crown to …

ae, us, pt (code pays fourni par la source)

Insights into Volume 66, Issue 2, 2025 of the Portuguese Journal of Stomatology, Dental Medicine and Maxillofacial Surgery

Jorge N. R. Martins, Jaime Portugal