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.
Specialties: In business since 1963, IDEAL Door manufactures residential and commercial garage doors. Developed the patented EZ-SETÂ® Spring System and the Safe-T-BracketÂ® Bottom Bracket. Manufacturers steel garage doors from their âgoodâ economy grade to their âbestâ insulated steel model.