Dental restorative system and components

A dental abutment having a longitudinal axis, the abutment comprising:

• a base portion for engagement with a dental implant;
• a tapered coronal portion having a non-frustoconical upper portion, and defining a coronal extremity spaced proximally from said base portion;
• the tapered coronal portion having an apical bottom;
• an emergence profile portion disposed between said base portion and said tapered coronal portion, said emergence profile portion and said tapered coronal portion, said emergence profile portion general defining a longitudinal direction and comprising:
• at least a first concave surface;
• at least a first convex surface, and
• a chamfer having an apical edge and a coronal edge, wherein the first concave surface and the first convex surface of the emergence profile portion are both disposed coronally relative to the coronal edge of the chamfer, and wherein the chamfer forms a short ring so that the coronal edge is substantially closer to the apical edge than the first convex surface entirely around the abutment, and the chamfer is sloped to extend radially outward as the chamfer extends coronally from the apical edge to the coronal edge, and wherein the apical end extends radially outward from the base portion to the apical edge,
• wherein the combined longitudinal length of the first concave surface and the first convex surface forms a longer portion of the emergence profile portion than the longitudinal length of the chamfer;
• and
• a margin shoulder positioned between the emergence portion and the apical bottom of the tapered coronal portion, the margin shoulder having a lingual side and a facial side, the margin shoulder extending interproximally from the lingual side to the facial side such that the margin shoulder continuously slopes apically from the apical bottom of the tapered coronal portion, wherein the facial side of the margin shoulder is positioned closer to the base portion than is the lingual side of the margin shoulder;
• the margin shoulder further defining an arcuate transition zone positioned axially along the apical bottom of the tapered coronal portion, the transition zone formed by an increasing radius of the apical bottom of the tapered coronal portion in an apical direction, such that the apical bottom of the tapered coronal portion flares continuously radially outwardly to the radially outermost edge of the margin shoulder,
• wherein the first concave surface and the first convex surface of the emergence profile portion are both disposed apically relative to the margin shoulder.

A dental abutment having a longitudinal axis, the abutment comprising:

• a polygonal base portion for engagement with a dental implant;
• a tapered coronal portion having a non-frustoconical upper portion, and defining a coronal extremity spaced proximally from said base portion;
• the tapered coronal portion having an apical bottom;
• an emergence profile portion disposed between said base portion and said tapered coronal portion, said emergence profile portion generally defining a longitudinal direction and comprising:
• at least a first concave surface,
• at least a first convex surface contiguous with the first concave surface, and
• a chamfer having an apical edge forming a junction with the base portion, and a coronal edge disposed apically relative to the first concave surface and the first convex surface such that the first concave surface and the first convex surface of the emergence profile portion are both disposed coronally relative to the coronal edge of the chamfer, wherein the chamfer forms a short ring so that the coronal edge is substantially closer to the apical edge than the first convex surface entirely around the abutment, and is sloped to extend radially outward as the chamfer extends coronally from the apical edge to the coronal edge,
• wherein the combined longitudinal length of the first concave surface and the firs convex surface forms a longer portion of the emergence profile portion than the longitudinal length of the chamfer;
• an internal longitudinal bore having a shoulder and a threaded region,
• wherein said longitudinal length of said emergence profile portion is greater in a lingual aspect than in a facial aspect;
• and
• a margin shoulder positioned between the emergence portion and the apical bottom of the tapered coronal portion, the margin shoulder having a lingual side and a facial side, the margin shoulder extending interproximally from the lingual side to the facial side such that the margin shoulder continuously slopes apically from the apical bottom of the tapered coronal portion, wherein the facial side of the margin shoulder is positioned closer to the base portion than is the lingual side of the margin shoulder;
• the margin shoulder further defining an arcuate transition zone positioned axially along the apical bottom of the tapered coronal portion, the transition zone formed by an increasing radius of the apical bottom of the tapered coronal portion in an apical direction, such that the apical bottom of the tapered coronal portion flares continuously radially outwardly to the radially outermost edge of the margin shoulder,
• wherein the first concave surface and the first convex surface of the emergence profile portion are both disposed apically relative to the margin shoulder.