Cannabidiol (CBD), a non-psychotropic cannabinoid produced by the genus Cannabis, is a phytoceutical that activates the endocannabinoid system (ECS) through binding to CB1 and CB2 receptors. The ECS is involved in cellular homeostasis and regu...

?vod a c?l: Mno?stv? publikac? a investic do 3D tisku jsou d?kazem n?r?stu z?jmu o tuto v?robn? metodu. Za objevitele s prvn?m patentem v oboru se pova?uje Ameri?an Charles W. Hull. Principem 3D tisku je tisk ??dan?ho p?edm?tu ve vrstv?ch na z... ?vod a c?l: Mno?stv? publikac? a investic do 3D tisku jsou d?kazem n?r?stu z?jmu o tuto v?robn? metodu. Za objevitele s prvn?m patentem v oboru se pova?uje Ameri?an Charles W. Hull. Principem 3D tisku je tisk ??dan?ho p?edm?tu ve vrstv?ch na z...

Instrument fracture ranks among the most crucial complications during the endodontic treatment of a tooth. In order to better understand the practical limits of the instrument, the relation between the cyclic fatigue resistance and physical properties such as hardness, modulus of elasticity, creep and surface roughness were explored. Cyclic fatigue testing in an artificial root canal at intracanal temperature, nanoindentation and 3D microscopy were used for evaluation of four commonly used thermomechanically treated NiTi endodontic instruments (Unicone Plus 6/025, Unicone 6/025, Reciproc Blue R25 and WaveOne Gold Primary). Cyclic fatigue results were analyzed using the Kruskal–Wallis, Mann–Whitney and Bonferroni corrections. The wear resistance of Unicone 6/025 instruments was significantly lower compared to all other instruments (p < 0.05). WaveOne Gold Primary was significantly less resistant than Unicone Plus 6/025 and Reciproc Blue R25, while the difference between Reciproc Blue R25 and Unicone Plus 6/025 was insignificant (p > 0.05). These results are in correlation with measurements of local mechanical properties (hardness, elastic modulus and their ratios H/E and H³/E²). Even though surface roughness, area of cross-section and shape of instruments are important factors affecting instruments behavior, thermal processing appears to be the most important.

?vod a cie?: Materi?ly ur?en? k definit?vnemu plneniu kore?ov?ch kan?likov tvoria neoddelite?n? s??as? vybavenia ka?dej ordin?cie zubn?ho lek?ra, pri?om sa v z?vislosti od svojho zlo?enia m??u odli?ova? v niektor?ch svojich fyzik?lnych, chemic... ?vod a cie?: Materi?ly ur?en? k definit?vnemu plneniu kore?ov?ch kan?likov tvoria neoddelite?n? s??as? vybavenia ka?dej ordin?cie zubn?ho lek?ra, pri?om sa v z?vislosti od svojho zlo?enia m??u odli?ova? v niektor?ch svojich fyzik?lnych, chemic...

?vod a ciel?: S??asn? endodoncia m? k dispoz?cii nespo?etn? mno?stvo materi?lov, ur?en?ch k definit?vnemu plneniu kore?ov?ch kan?likov, ktor? sa l??ia svoj?m zlo?en?m a tie? aj svojimi fyzik?lnymi, chemick?mi a biologick?mi vlastnos?ami. Dent?... ?vod a ciel?: S??asn? endodoncia m? k dispoz?cii nespo?etn? mno?stvo materi?lov, ur?en?ch k definit?vnemu plneniu kore?ov?ch kan?likov, ktor? sa l??ia svoj?m zlo?en?m a tie? aj svojimi fyzik?lnymi, chemick?mi a biologick?mi vlastnos?ami. Dent?...

?vod a c?l: Problematika zalomen? endodontick?ch nikl-titanov?ch (NiTi) n?stroj? je velmi obs?hl?. Jedn? se o slitinu, kter? m? schopnost m?nit vnit?n? strukturu. Velk? ?sil? je v?nov?no v?voji slitiny s ide?ln?mi vlastnostmi. K zalomen? nikl-... ?vod a c?l: Problematika zalomen? endodontick?ch nikl-titanov?ch (NiTi) n?stroj? je velmi obs?hl?. Jedn? se o slitinu, kter? m? schopnost m?nit vnit?n? strukturu. Velk? ?sil? je v?nov?no v?voji slitiny s ide?ln?mi vlastnostmi. K zalomen? nikl-...