Left-handed individuals account for 13% of the global population, and as such, the vast majority of equipments are for right-handed people, including dentistry. Thus, 87% of the world’s population is right-handed, although it is estimated that this population is really only 65%, the rest were conditioned to use the right hand during their formative years. In stomatology, as a profession, left-handed individuals also have certain problems, given that the instruments and equipment are designed mostly for right-handed individuals. This fact motivated Ancar to study and design treatment units designed for right- and lefthanded individuals in a single work space.We call it the “Scandinavian” series: A treatment unit specially designed so that left- and right-handed individuals can manage their work capacity effectively and ergonomically. In the Scandinavian models, the water unit is independent from the chair and is xed on the oor, on the left side (standard) or on the right side (optional) of the patient. With this solution, we offer a multi-use treatment unit for right- and left-handed professionals, with a simple movement from right to left and vice versa of the instrument tray and assistant support.