Results: 74

Tips for studies with quantitative morphology (morphometry and stereology)

Int. j. morphol; 35 (4), 2017
SUMMARY: The quantitative morphology contributes to making the studies less subjective and reproducible. Quantitative results are analyzed with statistics and should be based on a well-defined sample. Quantitative variables can be 'continuous' or 'discrete.' In this text, the term 'morphometry' is used t...

Digital models: How can dental arch form be verified chairside?

ABSTRACT Introduction: Plaster dental casts are routinely used during clinical practice to access maxillary dental arch form and assist on fabrication of individualized orthodontic archwires. Recently introduced, digital model technology may offer a limitation for the obtainment of a dental physical re...

Use of the Uro Dyna-CT in endourology - the new frontier

Int. braz. j. urol; 43 (4), 2017
ABSTRACT We describe the use of the Uro Dyna-CT, an imaging system used in the operating room that produces real-time three-dimensional (3D) imaging and cross-sectional image reconstructions similar to an intraoperative computerized tomography, during a percutaneous nephrolithotomy and a contralateral fl...

Impact of personalized three-dimensional (3D) printed pelvicalyceal system models on patient information in percutaneous nephrolithotripsy surgery: a pilot study

Int. braz. j. urol; 43 (3), 2017
ABSTRACT Objective To investigate the impact of personalized three dimensional (3D) printed pelvicalyceal system models on patient information before percutaneous nephrolithotripsy surgery. Material and Methods Patients with unilateral complex renal stones with indicatation of percutaneous nephrolith...

Evaluation of the rapid and slow maxillary expansion using cone-beam computed tomography: a randomized clinical trial

ABSTRACT OBJECTIVE: The aim of this randomized clinical trial was to evaluate the dental, dentoalveolar, and skeletal changes occurring right after the rapid maxillary expansion (RME) and slow maxillary expansion (SME) treatment using Haas-type expander. METHODS: All subjects performed cone-beam compu...

3D analysis of effects of primary surgeries in cleft lip/palate children during the first two years of life

Abstract This study aimed at monitoring the maxillary growth of children with cleft lip/palate in the first two years of life, and to evaluate the effects of primary surgeries on dental arch dimensions. The sample consisted of the three-dimensional digital models of 25 subjects with unilateral complete c...

Noncontact three-dimensional evaluation of surface alterations and wear in NiTi endodontic instruments

Abstract The aim of this study was to undertake a qualitative and quantitative assessment of nanoscale alterations and wear on the surfaces of nickel-titanium (NiTi) endodontic instruments, before and after use, through a high-resolution, noncontact, three-dimensional optical profiler, and to verify the ...

Elastomers three-dimensional biomodels proven to be a trustworthy representation of the angiotomographic images

Arq. neuropsiquiatr; 74 (9), 2016
ABSTRACT Intracranial aneurysm (IA) rupture is responsible for 80% of spontaneous arachnoid hemorrhages and associated with an extremely high mortality rate. Two possible surgical interventions are endovascular embolization and microsurgical clipping. Three-dimensional (3D) prototyping models help in sur...

Neuronavegación en exéresis de linfangioma orbitario

El linfangioma es un tumor benigno raro y predominante en la infancia, debido a su crecimiento puede comprometer al órgano donde se desarrolla, se han propuesto varias opciones de trata-miento, sin embargo, la cirugía continúa siendo la primera opción. La neuronavegación permite realizar exéresis c...

Uso de malhas tridimensionais em cirurgia plástica

Rev. bras. cir. plást; 31 (1), 2016
INTRODUÇÃO: O registro da imagem como conhecemos hoje evoluiu muito desde os primórdios da fotografia por meio da impressão da luz diretamente em um material fotossensível, até os algoritmos matemáticos que constituem malhas tridimensionais, na estereofotogrametria. A tecnologia 3D para captura e ...