The primary objective of this study is to evaluate the safety and feasibility of the use of the Tryton bifurcation coronary stent system for the treatment of single de novo bifurcation lesions in native coronary arteries with reference vessel diameters (RVD) for the proximal main vessel of 2.5 - 5.0 mm, distal main branch of 2.5 - 5.0 mm, and side branch RVD 2.5 - 3.5 mm.