The present invention discloses a self-contained dental prophylaxis angle with a separate therapeutic content lumen and drive shaft lumen. The main body includes an opening and a heat radiating part provided at an opposite side of the opening. The set of one or more units at a first level includes one or more units dynamically instantiated at design creation time as well as at least a first unit composed of a previously instantiated hardware system composed with two or more levels of units within the hardware system design hierarchy of the previously instantiated hardware system. The hinge assembly includes a hinge pin having a longitudinal axis. The invention is also directed to compositions, uses and combination packs or kits related to the treatment method. A polyester, aramid, or carbon fiber tensile cord for rubber reinforcement may be treated with the primer coat and the overcoat.