DR. DENNIS G CRANDALL, M.D.
Medical Practice at Dobson Rd, Mesa, AZ

2002008, Jun 27, 2002

Aug 28, 2001

09/941153

Dennis Crandall - Mesa AZ, US
Matthew Morrison - Cordova TN, US
Terrance Strohkirch - Cordova TN, US

A61B017/58

606/061000

A double-jointed bone bolt for use in an apparatus for maintaining vertebra in a desired relationship. The apparatus has a rod that extends substantially along the spine and one or more bone bolts. At least one of the bone bolts is double jointed. The double-jointed bolt has a mounting portion with a hook or coarse threads to engage a vertebra, and the mounting portion is attached to a pivot post in a manner that allows the pivot post to be rotatable about a common axis in respect to the mounting portion. The pivot post of the bone bolt is then pivotally attached to a connector portion of the bone bolt that has machine threads upon which a surgeon may attach a clamp. The clamp has a second bolt and an arm. The second bolt holds the rod and the arm to the clamp. The second bolt has a first channel to attach to the rod, while the arm has a second channel to attach the double-jointed bone bolt.

6309391, Oct 30, 2001

Mar 15, 2000

9/526435

Dennis Crandall - Mesa AZ
Matthew M. Morrison - Cordova TN
Terrance Strohkirch - Cordova TN

SDGI Holding, Inc. - Wilmington DE

A61B 1756

606 61

A double-jointed bone bolt for use in an apparatus for maintaining vertebra in a desired relationship. The apparatus has a rod that extends substantially along the spine and one or more bone bolts. At least one of the bone bolts is double jointed. The double-jointed bolt has a mounting portion with a hook or coarse threads to engage a vertebra, and the mounting portion is attached to a pivot post in a manner that allows the pivot post to be rotatable about a common axis in respect to the mounting portion. The pivot post of the bone bolt is then pivotally attached to a connector portion of the bone bolt that has machine threads upon which a surgeon may attach a clamp. The clamp has a second bolt and an arm. The second bolt holds the rod and the arm to the clamp. The second bolt has a first channel to attach to the rod, while the arm has a second channel to attach the double-jointed bone bolt.

7322979, Jan 29, 2008

Nov 11, 2002

10/291946

Dennis Crandall - Mesa AZ, US
Matthew M. Morrison - Cordova TN, US
Terrance Strohkirch - Cordova TN, US

Warsaw Orthopedic, Inc. - Warsaw IN

A61B 17/56

606 61

A double-jointed bone bolt for use in an apparatus for maintaining vertebra in a desired relationship. The apparatus has a rod that extends substantially along the spine and one or more bone bolts. At least one of the bone bolts is double jointed. The double-jointed bolt has a mounting portion with a hook or coarse threads to engage a vertebra, and the mounting portion is attached to a pivot post in a manner that allows the pivot post to be rotatable about a common axis in respect to the mounting portion. The pivot post of the bone bolt is then pivotally attached to a connector portion of the bone bolt that has machine threads upon which a surgeon may attach a clamp. The clamp has a second bolt and an arm. The second bolt holds the rod and the arm to the clamp. The second bolt has a first channel to attach to the rod, while the arm has a second channel to attach the double-jointed bone bolt.

2008026, Oct 30, 2008

Apr 30, 2007

11/796757

Dennis G. Crandall - Mesa AZ, US
T. Andrew Simonton - Memphis TN, US
Sean M. Haddock - Memphis TN, US

A61M 31/00

604506

A method is disclosed for increasing the stiffness of an intervertebral disc between vertebral bodies. The method includes providing a syringe with a needle approximately in the range of 16 to 25 gauge; providing a material having a first stage with a first viscosity adapted to flow through the needle, the material having a second stage with a second viscosity greater than the first viscosity, the second stage material having a stiffness in a range of 1.0-5.0 MPa; testing the annulus fibrosus of the disc to ensure that the annulus fibrosus has sufficient continuity so as to retain the first flowable stage material when subsequently injected into the disc; inserting the needle into the annulus fibrosus; injecting the first stage material into the disc; and permitting the first stage material to become the second stage material so as to form a load bearing implant in the disc.

2012011, May 10, 2012

Nov 8, 2010

12/941671

Matthew Van Nortwick - Memphis TN, US
Dennis G. Crandall - Mesa AZ, US

WARSAW ORTHOPEDIC, INC. - Warsaw IN

A61B 17/88, A61B 17/86

606279, 606305

A bone anchor assembly and a rigid extension rod removably coupleable thereto. The bone anchor assembly includes a screw base and a pivoting post. The post has a first recess in a proximal endface thereof, which may have first threads therein. The extension rod has a distal section separated from a proximal section by an intermediate section. The rod distal section has external threads that are threadingly engageable with the threads of the post recess. The rod third section may have external third threads of a different size. The rod intermediate section has an unthreaded exterior. When the extension rod is coupled to the post, an exterior of the second section of the extension rod is aligned with the exterior of the post. Other connection approaches may be used. An optional spacer may also be used to couple the rod to the post.

2009026, Oct 22, 2009

Apr 19, 2008

12/106286

Harold Sparr Taylor - Memphis TN, US
Douglas N. Baker - Collierville TN, US
Marco Capote - Louisville CO, US
Dennis Crandall - Mesa AZ, US

WARSAW ORTHOPEDIC, INC. - Warsaw IN

A61B 17/70, A61B 17/04

606246, 606250, 606301, 606264

Embodiments of a spinal implant system include a fixation element, a connector body, and a compression member. The fixation element has a bone engaging portion, a pivoting portion, and a hinge portion. The hinge portion permits pivotal motion of the pivoting portion relative to the bone engaging portion. Additionally, the connector body defines a channel configured for receipt of an elongate member and defines an elongate slot configured for receipt of the pivoting portion of the fixation element. The pivoting portion is positionable in any one of a plurality of positions along the elongate slot. The compression member is adapted to engage the pivoting portion of the fixation element and press against the connector body to lock the pivoting portion at a desired angular position relative to the bone engaging portion and lock the connector body to the fixation element at the desired position along the elongate slot.