The term "orthodontic technological work" as used in this chapter is hereby defined as the extra-oral procedures of constructing, making, altering, repairing, or duplicating of orthodontic appliances. The persons performing orthodontic technological work, other than dentists, shall be referred to as orthodontic technicians. For the purposes of this chapter references to dental technicians or dental technological work include orthodontic technicians and orthodontic technological work unless specific reference is made to orthodontic technicians or orthodontic technological work.