Patent ID: 11925365
Assignee: DEPUY IRELAND UNLIMITED COMPANY
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A patella drill guide and trial instrument, comprising:
a single monolithic metal body, comprising:
(i) a posterior trial bearing surface configured to articulate with a condylar surface of a prosthetic femoral component, the posterior trial bearing surface comprising a curved peak surface that defines the posterior-most surface of the patella drill guide and trial instrument,
(ii) an anterior surface positioned opposite the posterior trial bearing surface,
(iii) a plurality of peripheral spikes extending outwardly from the anterior surface that are configured to engage a surgically-prepared posterior surface of a patient's patella to prevent the patella drill guide and trial instrument from rotating with respect to the patient's patella when the anterior surface is engaged with the surgically-prepared posterior surface of the patient's patella,
(iv) a center spike extending outwardly from the anterior surface that is configured to engage a surgically-prepared posterior surface of a patient's patella, the center spike defining a central axis, and
(v) a number of drill guide holes extending through the patella drill guide and trial instrument from the posterior trial bearing surface to the anterior surface,
wherein the patella drill guide and trial instrument is are configured to be positioned in a first position where only the center spike engages the surgically-prepared posterior surface of a patient's patella to allow rotational positioning of the patella drill guide and trial instrument relative to the patient's patella about the central axis, and
wherein the patella drill guide and trial instrument is are configured to be positioned in a second position where the number of peripheral spikes engage the surgically-prepared posterior surface of a patient's patella to prevent the patella drill guide and trial instrument from rotating with respect to the patient's patella.