US 12,220,296 B1
Osteotomy drill bit to produce an optimally shaped jawbone opening for a dental implant and abutment
Gary Bram, Woodbury, NY (US)
Filed by Gary Bram, Woodbury, NY (US)
Filed on Aug. 20, 2020, as Appl. No. 16/998,253.
Application 16/998,253 is a continuation in part of application No. 16/704,286, filed on Dec. 5, 2019, granted, now 11,471,172.
Claims priority of provisional application 62/776,246, filed on Dec. 6, 2018.
Int. Cl. A61C 8/00 (2006.01); A61B 17/16 (2006.01); A61C 3/02 (2006.01)
CPC A61C 8/0089 (2013.01) [A61B 17/1615 (2013.01); A61B 17/1673 (2013.01); A61C 3/02 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A dental drill bit configured to drill a particularly shaped opening in a tooth and in a portion of a human jawbone, the drilled opening being particularly shaped to receive a dental implant screw and a portion of an abutment therein, said dental drill bit comprising:
a mounting shank, said mounting shank having a proximal end and a distal end, said proximal end configured to be received within a drill;
a cutting head, said cutting head having a proximal end and a distal end, said proximal end of said cutting head transitioning into said distal end of said mounting shank; said cutting head comprising: four blades protruding away from an axis of said drill bit, each blade of said four blades having a thickness and being positioned 90 degrees to an adjacent blade of said four blades to form a cruciform-shaped cross-section; and each blade of said four blades having a shaped periphery comprising:
a first radiused periphery, and
a second radiused periphery;
wherein said first radiused periphery comprises: an arc being a portion of a circle configured to form a spherical frustum-shaped socket portion, when rotated about the axis of said drill bit, being defined by a first plane and a second plane, with the spherical frustum-shaped socket portion thereby formed being shaped to match a portion of a spherical surface of the abutment, wherein the tangent at a proximal end of said arc is parallel to said axis of said dental drill bit;
wherein said second radiused periphery comprises:
an arc being a portion of a circle and having a first end being coextensive with, and perpendicular to, said second plane;
wherein a radius of said arc of said second radiused periphery is greater than a distance between said first end of said arc of said second radiused periphery and the axis of said dental drill bit; and
wherein said second radiused periphery is thereby configured to form a bullet shaped socket portion, when rotated about said axis of said drill bit, to match at least a portion of a shape of the dental implant screw;
wherein a proximal end of said second radiused periphery transitions into a distal end of said first radiused periphery and is positioned a distance away from said axis of said dental drill bit to form a desired root radius;
wherein the tangent at said proximal end of said second radiused periphery is parallel to said axis of said dental drill bit; and
wherein a distal end of said second radiused periphery is chamfered to truncate a length of each of said four blades to reduce a length of the bullet shaped socket portion formed therewith to correspond to a length of the dental implant screw.