Cíl: Cílem sdělení je seznámit čtenáře s aktuální situací v možnostech využití 3D skenerů ve stomatologických a ortodontických praxích. Úvod: Digitalizace modelů přináší nespočet výhod, ať už se jedná o měření na modelech, komunikaci postupu léčby s jinými odborníky, skladování modelů či jejich zhotovování. Materiál a metodika: Laboratorní a intraorální skenery dostupné na současném trhu. Výsledky: Přesnost a vysoká úroveň technických parametrů všech popsaných skenerů je příznivá pro použití v lékařské praxi. Z laboratorních skenerů je u ortodontistů v České republice oblíbená značka 3Shape pro její rychlé snímání. Z intraorálních skenerů je nejvíce využívaný skener Trios (3Shape) a nyní čím dál více iTero® pro jeho přímou návaznost na systém Invisalign. Závěr: 3D skenery jsou pro ortodontisty praktickými pomocníky a pro pacienty příjemným komfortem. Rozšiřují a usnadňují odbornou komunikaci a jsou také prostředkem pro názornou demonstraci postupu a variant terapie pro konkrétního pacienta. V průběhu několika let se nepochybně stanou běžnou součástí většiny stomatologických praxí.
Objective: The aim of the paper is to familiarize the reader with the current status in the possibilities of using 3D scanners in dental and orthodontic practices. Introduction: The digitization of models brings countless benefits, whether it is measurement on models, communication of treatment with other professionals, storage or making them. Material and methodology: Laboratory and intraoral scanners available in the current market. Results: The accuracy and high level of technical parameters of all the scanners described is favorable for use in medical practice. From the laboratory scanners, the 3Shape is a favorite for orthodontists in the Czech Republic for its fast scanning. From intraoral scanners, Trios (3Shape) is the most widely used scanner, and now more and more iTero® for its direct connection to the Invisalign system. Conclusion: 3D scanners are practical helpers for the orthodontists, for patients‘ pleasurable comfort. They are expanding and facilitating professional communication, and they are also a means of illustrating the progress and variants of therapy for a particular patient. Over the course of several years, they will undoubtedly become a common part of most dental practices.
- MeSH
- Computer-Aided Design instrumentation MeSH
- Microscopy, Confocal MeSH
- Humans MeSH
- Mandible diagnostic imaging MeSH
- Maxilla diagnostic imaging MeSH
- Odontometry instrumentation MeSH
- Tomography, Optical Coherence MeSH
- Orthodontics * instrumentation MeSH
- Orthodontic Appliance Design methods instrumentation MeSH
- Patient Care Planning MeSH
- Computer Simulation * MeSH
- Image Processing, Computer-Assisted instrumentation MeSH
- Imaging, Three-Dimensional * instrumentation MeSH
- Models, Dental * MeSH
- Dental Impression Technique instrumentation MeSH
- Check Tag
- Humans MeSH
- Publication type
- Review MeSH
The clinical assessment of microvascular pathologies (in diabetes and in inflammatory skin diseases, for example) requires the visualization of superficial vascular anatomy. Photoacoustic tomography (PAT) scanners based on an all-optical Fabry-Perot ultrasound sensor can provide highly detailed 3D microvascular images, but minutes-long acquisition times have precluded their clinical use. Here we show that scan times can be reduced to a few seconds and even hundreds of milliseconds by parallelizing the optical architecture of the sensor readout, by using excitation lasers with high pulse-repetition frequencies and by exploiting compressed sensing. A PAT scanner with such fast acquisition minimizes motion-related artefacts and allows for the volumetric visualization of individual arterioles, venules, venous valves and millimetre-scale arteries and veins to depths approaching 15 mm, as well as for dynamic 3D images of time-varying tissue perfusion and other haemodynamic events. In exploratory case studies, we used the scanner to visualize and quantify microvascular changes associated with peripheral vascular disease, skin inflammation and rheumatoid arthritis. Fast all-optical PAT may prove useful in cardiovascular medicine, oncology, dermatology and rheumatology.
- MeSH
- Acne Vulgaris complications MeSH
- Adult MeSH
- Keloid etiology pathology MeSH
- Middle Aged MeSH
- Humans MeSH
- Aged MeSH
- Imaging, Three-Dimensional methods MeSH
- Check Tag
- Adult MeSH
- Middle Aged MeSH
- Humans MeSH
- Male MeSH
- Aged MeSH
- Female MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
Úvod a cíle práce: Sádrové studijní modely jsou standardem uchovávání dat pacienta ve 3D podobě. S rozvojem digitálních technologií se vyvinuly také možnosti, jak z digitálních dat vytvořit fyzický objekt – 3D tiskem. Cílem této práce bylo: (1) srovnat přesnost lineárních měření na sádrových studijních modelech a jejich 3D rekonstruovaných kopiích, (2) zhodnotit nové možnosti, výhody a nevýhody použití 3D tisku při použití ve stomatologii a (3) zjistit, do jaké míry mohou 3D tištěné modely nahradit tradiční modely. Materiál a metody: Deset sádrových studijních modelů ortodontického oddělení Stomatologické kliniky dětí a dospělých 2. LF UK a FN Motol bylo naskenováno a digitální data se použila pro open source 3D tiskárnu RepRap. Na modelech z tiskárny bylo provedeno měření stejných vzdáleností v rovinách x, y a z, jako na tradičních sádrových modelech. Získaná data se statisticky vyhodnotila. Výsledky: 3D tisk je vhodnou metodou k převodu digitálních dat do fyzické podoby. 3D repliky vykazují výhodnější vlastnosti než tradiční sádrové modely zejména z hlediska mechanické odolnosti a možnosti získání fyzického modelu jen v případě potřeby, především pro dlouhodobou kontrolu terapie u pacienta či pro forenzní řízení. Studie prokázala, že 3D tisky mohou být alternativou k tradičním sádrovým modelům a je možné na nich provést přesnou analýzu rozměrů zubních oblouků.
Introduction: Plaster casts present golden standard in keeping patients data in 3D. The aim of this work was (1) to compare linear measurements made on traditional plaster casts and 3D printed copies of dental plaster casts, (2) to find new possibilities of reconstruction of digital data, its reliability based on various criteria and (3) to determine whether 3D printed copies obtained using open source system RepRap can replace traditional plaster casts in dental practice. Material and methods: 10 dental plaster casts from the Orthodontic department, Department of stomatology for children and adults, 2nd Faculty of medicine, Charles University Prague, Czech Republic were scanned by inEos Blue scanner and printed on 3D printer RepRap. Linear measurements between selected points on the dental arches of upper and lower jaws on plaster casts and their 3D copies were recorded and statistically analyzed. Results: Use of 3D printed copies has many advantages over use of traditional plaster casts, mainly mechanical durability and keeping the data in digital form unless needed for example for forensic reasons. The precision and accuracy of the RepRap 3D printed copies of plaster casts were confirmed based on the statistical analysis. Our study proved that 3D printed copies can replace traditional plaster casts and it is possible to use them for detailed analysis.
- MeSH
- Humans MeSH
- Orthodontics MeSH
- Calcium Sulfate MeSH
- Statistics as Topic MeSH
- Printing * methods MeSH
- Imaging, Three-Dimensional * MeSH
- Models, Dental * classification MeSH
- Check Tag
- Humans MeSH
- Publication type
- Research Support, Non-U.S. Gov't MeSH
This article deals with methodology and possibilities of using the Artec Eva scanner (Artec 3D, Luxembourg) in the field of prosthetics and orthotics with a focus on the part of face and neck. The methodology has been divided into 5 basic parts—environment preparation, scanner, subjects, scanning, and 3D modelling. The practical part includes 3D images of selected subjects representing a sample covering various types, especially in terms of the hair, beard, and eye area. Scanner outputs can be used in medicine for the manufacture of prostheses and dental implants and in the design of remodeling and other orthoses on the head.
- MeSH
- Humans MeSH
- Orthodontics methods MeSH
- Imaging, Three-Dimensional * methods MeSH
- Check Tag
- Humans MeSH
- Publication type
- Research Support, Non-U.S. Gov't MeSH
Our purpose in this case report is to present an orthodontic treatment obtained and the results achieved in 17-year-old white female patient with Angle Class II malocclusion and bilateral posterior crossbite. Patient was treated with bonded acrylic Hyrax appliance and surgically assisted rapid maxillary expansion (SARME). The multiloop system 0.16 TMA (ß titanium) arch wire was used in the alignment phase and on purpose to prohibit bite opening and optimize threedimensional movement control. After treatment bonded lingual retainers were placed in between maxillary central incisors and in mandible canine-to-canine. A functional removable Klammt appliance was used for retention. The 3D Laser Scanner Roland LPX-250 was used in order to obtain digital dental casts. Evaluation of the treatment results was measured on these models and using finite element scaling analysis (FESA). An Angle Class I relationship was obtained after 2½ years of treatment, function and facial aesthetics were improved. The shape of the palate changed significant in the width direction, not significantly in length and high direction. The greatest expansion of palate was found in the region between the palatal cusps of the first molars 26.6%, followed by first 21.9% and second premolars 16.5%. SARME in adult patients with bilateral cross bite and maxillary deficiency lead to satisfactory results. The 3D laser scanned models and their measurements, using advanced software’s are successfully used for precise studies.
- MeSH
- Finite Element Analysis MeSH
- Lasers diagnostic use MeSH
- Humans MeSH
- Malocclusion pathology therapy MeSH
- Adolescent MeSH
- Orthodontic Retainers MeSH
- Palatal Expansion Technique MeSH
- Imaging, Three-Dimensional MeSH
- Check Tag
- Humans MeSH
- Adolescent MeSH
- Female MeSH
- Publication type
- Case Reports MeSH
- Research Support, Non-U.S. Gov't MeSH
There are special medical cases, where standard medical imaging modalities are able to offer sufficient results, but not in the optimal way. It means, that desired results are produced with unnecessarily high expenses, with redundant informations or with needless demands on patient. This paper deals with one special case, where information useful for examination is the body surface only, inner sight into the body is needless. New specialized medical imaging device is developed for this situation. In the Introduction section, analysis of presently used medical imaging modalities is presented, which declares, that no available imaging device is best fitting for mentioned purposes. In the next section, development of the new specialized medical imaging device is presented, and its principles and functions are described. Then, the parameters of new device are compared with present ones. It brings significant advantages comparing to present imaging systems.
- Publication type
- Journal Article MeSH
Human face is a dynamic system where facial expressions can rapidly modify geometry of facial features. Facial expressions are believed to be universal across world populations, but only a few studies have explored whether grimacing is sexually dimorphic and if so to what extent. The present paper explores inter- and intra-individual variation of human facial expressions with respect to individual's sex based on a set of neutral and expression-varying 3D facial scans. The study sample composed of 20 individuals (10 males and 10 females) for whom 120 scans featuring grimaces associated with disgust, surprise, "u" sound, smile and wide smile were collected by an optical scanner Vectra XT. In order to quantify the dissimilarity among 3D images, surface comparison approach based on aligned 3D meshes and closest point-to-point distances was carried out in Fidentis Analyst application. The study revealed that sexual dimorphism was indeed one of the factors which determined the extent and characteristics of facial deformations recorded for the studied expressions. In order to produce a grimace, males showed a tendency towards extending their facial movements while females were generally more restrained. Furthermore, the facial movements linked to the wide smile and "u" sound were revealed as the most extensive relative to the other expressions, while the smile and surprise were shown indistinguishable from the neutral face.
- MeSH
- Analysis of Variance MeSH
- Models, Anatomic MeSH
- Adult MeSH
- Humans MeSH
- Young Adult MeSH
- Face anatomy & histology MeSH
- Sex Characteristics * MeSH
- Smiling MeSH
- Facial Expression * MeSH
- Imaging, Three-Dimensional MeSH
- Check Tag
- Adult MeSH
- Humans MeSH
- Young Adult MeSH
- Male MeSH
- Female MeSH
- Publication type
- Journal Article MeSH
