Patient-specific registration jig and associated method for registering an orthopaedic surgical instrument to a patient

Patent metadata

Field	Value
Publication number	US-2026083514-A1
Application number	US-202519335580-A
Country	US
Kind code	A1
Filing date	Sep 22, 2025
Priority date	Jun 29, 2021
Publication date	Mar 26, 2026
Grant date	—

Abstract

A patient-specific registration jig for registering an orthopaedic surgical instrument with a bony anatomy of a patient includes a head and an adaptor coupled to the head. The head includes a patient-specific contact surface configured to contact a portion of the patient's bony anatomy such that the head can be coupled to the patient's bony anatomy in a unique position. The adaptor includes an elongated shank having a first end coupled to the head and a second end and an adaptor end attached to the second end of the elongated shank. The adaptor end is configured to be received by a clutch of the orthopaedic surgical instrument. A method for registering the orthopaedic surgical instrument using the patient-specific registration jig is also disclosed.

First claim

1 . A system for registering an orthopaedic surgical instrument with a bony anatomy of a patient, the system comprising:
a patient-specific registration jig having a head and an adaptor coupled to the head and extending longitudinally therefrom, wherein the head includes a patient-specific contact surface configured to contact a portion of the patient's bony anatomy, the patient-specific contact surface includes a patient-specific negative contour configured to receive a portion of the patient's bony anatomy, and the adaptor includes (i) an elongated shank having a first end coupled to the head and a second end and (ii) an adaptor end attached to the second end of the elongated shank; and an orthopaedic surgical instrument having a clutch and at least one tracking sensor, wherein the clutch is configured to receive the adaptor end of the adaptor of the patient-specific registration jig and is operable to secure the patient-specific registration jig to the orthopaedic surgical instrument, and wherein the tracking sensor is configured for interaction with a surgical navigation system to facilitate tracking of the orthopaedic surgical instrument.

2 . The system of claim 1 , wherein the patient-specific negative contour of the patient-specific registration jig is configured to receive a portion of the patient's bony anatomy such that the head of the patient-specific registration jig is configured to couple to that portion of the patient's bony anatomy in a unique orientation and position relative to the patient's bony anatomy.

3 . The system of claim 1 , wherein the patient-specific registration jig is a patient-specific acetabulum registration jig and the patient-specific contact surface includes a patient-specific negative contour configured to receive a portion of the interior bony surface of the acetabulum of the patient's bony anatomy.

4 . The system of claim 1 , wherein the patient-specific registration jig is a patient-specific femoral registration jig and the patient-specific contact surface includes a patient-specific negative contour configured to receive a portion of a greater trochanter of the patient's femur.

5 . The system of claim 1 , wherein the adaptor end includes a first keyed feature configured to mate with a second keyed feature of the clutch of the orthopaedic surgical instrument.

6 . The system of claim 1 , wherein the orthopaedic surgical instrument is an orthopaedic impactor.

7 . The system of claim 6 , wherein the orthopaedic surgical instrument is an orthopaedic automated impactor.

8 . The system of claim 1 , wherein the tracking sensor is an electrical sensor configured to wirelessly communicate with the surgical navigation system.

9 . The system of claim 1 , wherein the tracking sensor is an optical tracking sensor.

10 . The system of claim 1 , wherein the head patient-specific registration jig includes a multi-part base, and wherein the adaptor is coupled to the multi-part base of the head.

11 . The system of claim 10 , wherein the multi-part base is adjustable to modify an inclination angle or a version angle of the head relative to the adaptor.

12 . The system of claim 11 , wherein the multi-part base comprises a fixed base connected to the head, a first movable wedge, and a second movable wedge interposed between the fixed base and the first movable wedge.

13 . The system of claim 12 , wherein the first movable wedge includes a proximal planar base surface connected to the adaptor and a distal planar angled surface opposite the proximal planar base surface, and wherein the distal planar angled surface is angled relative to the proximal planar base surface such that the first movable wedge has a wedge shaped side profile.

14 . The system of claim 13 , wherein the second movable wedge includes a distal planar base surface in contact with the fixed base and a proximal planar angled surface opposite the distal planar base surface, and wherein the proximal planar angled surface is angled relative to the distal planar base surface such that the second movable wedge has a wedge shaped side profile.

15 . The system of claim 14 , wherein the distal planar angled surface of the first movable wedge and the proximal planar angled surface of the second movable surface are in contact and configured to rotate on each other when the first movable wedge and second movable wedge are moved relative to each other.

16 . A method for registering an orthopaedic surgical instrument with a bony anatomy of a patient, the method comprising:
attaching a patient-specific registration jig to an orthopaedic surgical instrument, the patient-specific registration jig having a head and an adaptor coupled to the head and extending longitudinally therefrom, wherein the head includes a patient-specific contact surface configured to contact a portion of the patient's bony anatomy, the patient-specific contact surface includes a patient-specific negative contour configured to receive a portion of the patient's bony anatomy, and the adaptor is configured to be received by a clutch of the orthopaedic surgical instrument; coupling the patient-specific registration jig to a portion of the patient's bony anatomy, wherein coupling the patient-specific registration jig comprises inserting the portion of the patient's bony anatomy into the patient-specific negative contour of the head of the patient-specific registration jig; and controlling a surgical navigation system to register the orthopaedic surgical instrument to the bony anatomy of the patient while the patient-specific registration jig is coupled to the patient's bony anatomy.

17 . The method of claim 10 , wherein controlling the surgical navigation system to register the orthopaedic surgical instrument comprises controlling the surgical navigation system to generate registration data indicative of a position of the orthopaedic surgical instrument relative to the patient's bony anatomy.

18 . The method of claim 17 , further comprising controlling the surgical navigation system to track a position of the orthopaedic surgical instrument based on data received from a tracking sensor coupled to the orthopaedic surgical instrument.

19 . The method of claim 16 , wherein the head patient-specific registration jig includes a multi-part base and the adaptor is coupled to the multi-part base of the head, and wherein the multi-part base is adjustable to modify an inclination angle or a version angle of the head relative to the adaptor and comprises a fixed base connected to the head, a first movable wedge, and a second movable wedge interposed between the fixed base and the first movable wedge.

20 . The method of claim 19 , wherein the first movable wedge includes a proximal planar base surface connected to the adaptor and a distal planar angled surface opposite the proximal planar base surface, and wherein the distal planar angled surface is angled relative to the proximal planar base surface such that the first movable wedge has a wedge shaped side profile,
wherein the second movable wedge includes a distal planar base surface in contact with the fixed base and a proximal planar angled surface opposite the distal planar base surface, and wherein the proximal planar angled surface is angled relative to the distal planar base surface such that the second movable wedge has a wedge shaped side profile, and wherein the distal planar angled surface of the first movable wedge and the proximal planar angled surface of the second movable surface are in contact and configured to rota

Assignees

• Depuy Synthes Products Inc

Inventors

• Camino Thomas S
• Schnieders Barry A

Classifications

• G06T2207/30008

  Bone · CPC title

• A61B17/92

  Impactors or extractors, e.g. for removing intramedullary devices {(insertion or extraction of artificial joints A61F2/4603)} · CPC title

• G06T7/70

  Determining position or orientation of objects or cameras (camera calibration G06T7/80) · CPC title

• G06T7/149

  involving deformable models, e.g. active contour models · CPC title

• G06T7/30

  Determination of transform parameters for the alignment of images, i.e. image registration · CPC title