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Publication Number
US-12274452-B2
Publication Date
2025-04-15
Expiration Date
Abstract
Various patient-specific tibial guide housings, patient-specific tibial guide boxes, and methods of resecting the tibial plateau are disclosed herein.
Core Innovation
The disclosure describes a system for treating a tibia in which a tibial implant is intended to replace at least a portion of the tibia. The system includes a tibial guide housing with a top side, bottom side, front side, back side, medial side, and lateral side, and patient-specific reference arms with patient-specific contact surfaces configured to conform to first and second tibial surfaces on portions of the superior surface of the tibia.
The tibial guide housing further includes a patient-specific contact surface on the back side configured to conform to a third tibial surface, the third tibial surface being a portion of an anterior surface of the tibia. The patient-specific contact surface of the back side has a medial-most edge and a lateral-most edge, and the tibial guide housing defines a void positioned such that, when the patient-specific contact surfaces are in conforming engagement, a surgeon is able to view a portion of a peripheral edge of the anterior surface of the tibia having a medial-lateral position disposed between the medial-most edge and the lateral-most edge.
The tibial guide housing defines a tibial-guide-box opening in the front side for insertion of a tibial guide box and releasable securement of the tibial guide box to the tibial guide housing. When the tibial guide box is releasably secured and the patient-specific contact surfaces engage the tibial surfaces, a guide aperture of the tibial guide box guides a cutting tool along a cutting plane having a predetermined cut depth and angle, and the cutting plane is related to placement of the tibial implant onto the cut tibia at the predetermined cut depth and angle.
Claims Coverage
The partial content identifies two independent claims: one system claim and one method claim. Across these independent claims, the main inventive features include a patient-specific tibial guide housing with conforming reference arms and an anterior-surface back-side contact surface, a void for viewing a peripheral edge of the anterior surface, and a releasably secured tibial guide box whose guide aperture directs cutting along a cutting plane with a predetermined cut depth and angle for implant placement.
Patient-specific tibial guide housing with conforming reference arms and anterior back-side contact surface
A tibial guide housing comprising a first reference arm having a patient-specific contact surface configured to conform to a first tibial surface on a first portion of a superior surface; a second reference arm having a patient-specific contact surface configured to conform to a second tibial surface on a second portion of the superior surface; and a back side with a patient-specific contact surface configured to conform to a third tibial surface that is a portion of an anterior surface, where the back-side patient-specific contact surface has a medial-most edge and a lateral-most edge.
Viewing void for a peripheral edge of the anterior tibia surface
The tibial guide housing defines a void positioned such that, when the tibial guide housing is positioned on the tibia with the patient-specific contact surfaces in conforming engagement, a surgeon is able to view a portion of a peripheral edge of the anterior surface of the tibia having a medial-lateral position disposed between the medial-most edge and the lateral-most edge of the back-side patient-specific surface.
Releasably secured tibial guide box with guide aperture defining a cutting plane
The tibial guide housing defines a tibial-guide-box opening for insertion of a tibial guide box and releasable securement of the tibial guide box to the tibial guide housing, and when the tibial guide box is releasably secured and the contact surfaces are in conforming engagement, a guide aperture of the tibial guide box guides a cutting tool along a cutting plane having a predetermined cut depth and angle such that the tibial implant may be placed onto the cut tibia at the predetermined cut depth and angle.
Knee-treatment method using patient-specific guide housing, cutting guide box, and implant placement at predetermined depth and angle
A method of treating a tibia of a knee joint including providing a tibial guide housing with patient-specific reference arms including a back-side patient-specific contact surface conforming to a portion of an anterior surface and defining a void positioned for surgeon viewing of a portion of a peripheral edge of the anterior surface; providing a first tibial cutting guide box including a guide aperture configured to guide a cutting tool along a cutting plane having a predetermined cut depth and angle and at least one pin hole configured to accommodate a pin passing into the tibia; releasably securing the first tibial cutting guide box within an opening of the tibial guide housing; positioning the tibial guide housing on the tibia for conforming fit; inserting a cutting device through the guide aperture and cutting a portion of the tibia along the cutting plane to create a cut tibial surface; providing a tibial implant; and placing the tibial implant on at least a portion of the cut tibial surface at the predetermined cut depth and angle.
Across the independent system and method claims, the core claim coverage is directed to a patient-specific tibial guide housing that uses multiple conforming patient-specific contact surfaces together with a void enabling surgeon viewing of a peripheral anterior edge. A releasably secured tibial guide box with a guide aperture is used to guide a cutting tool along a cutting plane defined by predetermined cut depth and angle, enabling placement of a tibial implant onto the cut tibia at those predetermined parameters.
Stated Advantages
Enables a surgeon to view a portion of a peripheral edge of the anterior surface of the tibia during positioning of the tibial guide housing.
Documented Applications
Treating a tibia of a patient by providing a tibial implant and a patient-specific tibial guide housing and guide box arrangement, where a cutting plane with predetermined cut depth and angle is used for implant placement.
Treating a tibia of a knee joint of a patient, including positioning a tibial guide housing for conforming fit, cutting along a predetermined cutting plane using a tibial cutting guide box, and placing a tibial implant on the cut tibial surface.
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