US 12,150,829 B2
Access guide and drill kit to be used with same for endodontic access cavity preparation and method of use
David W. Kelliny, Torrance, CA (US)
Filed by David W. Kelliny, Torrance, CA (US)
Filed on Jul. 11, 2023, as Appl. No. 18/350,534.
Application 18/350,534 is a continuation of application No. 17/455,769, filed on Nov. 19, 2021, granted, now 11,744,673.
Application 17/455,769 is a continuation of application No. 16/039,228, filed on Jul. 18, 2018, granted, now 11,191,616, issued on Dec. 7, 2021.
Claims priority of provisional application 62/575,434, filed on Oct. 21, 2017.
Prior Publication US 2023/0346512 A1, Nov. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61C 5/44 (2017.01); A61C 1/08 (2006.01); A61C 5/42 (2017.01); A61C 3/02 (2006.01)
CPC A61C 5/44 (2017.02) [A61C 1/082 (2013.01); A61C 5/42 (2017.02); A61C 3/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A drill kit for endodontic access cavity preparation of a patient's teeth, the drill kit comprising:
a first drill bit including a high speed, friction grip attachment type drill bit having a first shank, a first shaft and a first head, the first head has a first head longitudinal length;
a second drill bit including a slow speed, latch attachment type drill bit having a second shank, a second shaft and a second head, the second head has a second head longitudinal length, wherein the second head longitudinal length is longer than the first head longitudinal length, wherein the first drill bit is adapted to be used in a first rotating speed to make a first opening of an access cavity in a patient's teeth and the second drill bit is adapted to be used in a second rotating speed that is slower than the first rotating speed to make a second opening of the access cavity, wherein the first drill bit is configured to generate a first diameter of the first opening of the access cavity, and the second drill bit is configured to generate a second diameter of the second opening of the access cavity that the second diameter of the second opening of the access cavity is smaller than the first diameter of the first opening of the access cavity, and wherein the second drill bit is adapted to be used after and in response to the use of the first drill bit during the same endodontic access cavity preparation that the second opening of the access cavity is smaller and deeper into the root structure of the patient's teeth than the first opening of the access cavity.