Patient-specific acetabular alignment guides

An acetabular device comprising:

• an annular acetabular guide including:
• a first surface and a second surface opposite to the first surface, the first surface being patient-specific and made to conform to an acetabular rim surface around an acetabulum of a patient in accordance with a three-dimensional image of the acetabulum of the patient;
• an inner surface configured to allow access to the acetabulum;
• and
• first and second guide formations configured to extend through the annular acetabular guide outside the acetabular rim surface, the first and second guide formations located at patient-specific locations around the acetabular rim surface;
• and
• a patient-specific adapter having first and second guiding openings configured to align with the first and second guide formations and having a quick-connection component for coupling to an acetabular instrument.

An acetabular device comprising:

• a patient-specific acetabular alignment guide comprising;
• a first portion for aligning with an acetabular rim surface of a specific patient;
• a second portion for aligning with a periactabular area of the specific patient;
• an opening in the first portion having a patient-specific acetabular centering axis extending therethrough;
• and
• a plurality of guiding formations extending through the second portion for guiding a plurality of alignment pins therethrough, wherein the plurality of guiding formations are arranged and configured relative to the patient-specific centering axis based on a pre-operative plan for the patient;
• and
• a patient-specific alignment adapter couplable to an acetabular instrument so that the acetabular instrument is co-axial with the patient-specific centering axis, the patient-specific alignment adapter having a plurality of openings configured to co-axially align with the plurality of guiding formations, respectively.