Semi-adjustable articulator with mounted casts. An articulator is a mechanical device used in dentistry to which casts of the maxillary (upper) and mandibular (lower) teeth are fixed, reproducing recorded positions of the mandible in relation to the maxilla.
The Greek scholar Heron of Alexandria created the earliest known automatic door in the 1st century AD during the era of Roman Egypt. The first foot-sensor-activated automatic door was made in China during the reign of Emperor Yang of Sui (r. 604â618), who had one installed for his royal library.
Adorable animal families that will make you aww. A molded door is a popular door style for interior residential openings. Rather than solid wood or metal, these units consist of hardboard or composite materials with a series of panels or designs pressed into the face of the door.hile molded doors consist of a solid piece of material, panel doors often feature trim elements arranged on the face of the door to form panels or patterns. Stile and rail units use a combination of vertical and horizontal wood elements joined together to form patterns.