Unicompartmental knee arthroplasty systems and methods

A cementless surgical implant, comprising:

• a tray extending from a first anterior end to a second posterior end, the tray including an upper surface, a lower surface opposite the upper surface, a first lateral edge extending in an anterior-posterior direction between the first anterior end and the second posterior end, and a second semi-circular medial edge opposite the first lateral edge and extending between the first anterior end and the second posterior end, a first plane extending in a medial-lateral direction through respective midpoints of the first lateral edge and the second semi-circular medial edge;
• a first post extending from a first anterior region of the lower surface of the tray along a first longitudinal axis and configured to be inserted into a bone portion, the first anterior region of the lower surface positioned away from the second semi-circular medial edge, the first post including a first opening extending in the anterior-posterior direction through the first post along a second axis and configured to receive a fastener, the first opening including a first set of threads, the first post including a third set of threads proximate the first opening;
• a second post extending from a second posterior region of the lower surface of the tray along a second longitudinal axis and configured to be inserted into the bone portion, the second posterior region of the lower surface positioned away from the second semi-circular medial edge, the second post including a second opening extending in the anterior-posterior direction through the second post along the second axis and configured to receive the fastener, the second axis extending through the first opening and the second opening and intersecting the first plane of the tray, the second opening including a second set of threads and wherein a first diameter of the first set of threads is greater than a second diameter of the second set of threads;
• and
• the fastener removably coupled to the first post and the second post, the fastener extending from a first fastener end to a second fastener end through the first opening and the second opening, the fastener including a first threaded portion and a second threaded portion, the first threaded portion configured to engage the first set of threads, the second threaded portion configured to engage the second set of threads, the fastener including a plurality of engagement features proximate the first fastener end, wherein the plurality of engagement features is configured to engage the first post.