Fixation strength of the ulnar component of total elbow replacement

Radiographic, Surgeon and Owner Assessment of the BioMedtrix TATE®Elbow Arthroplasty

“…In both dogs, the ulnar isthmus:cartridge width ratio was greater than the mean of elbows analyzed, which may have contributed to fracture. The frequency of olecranon fracture in this study (6%) is similar to that described for elbow arthroplasty in people …”

Evaluation of a Canine Total‐Elbow Arthroplasty System: A Preliminary Study in Normal Dogs

“…Radiographs of the left elbow joint revealed a fractured olecranon. In 5% of humans undergoing TEA, fracture of the olecranon has been reported as a major complication 16 . Bone cuts that are perpendicular to each other, creating a stress riser in the ulna, have been identified as a predisposing factor for an olecranon fracture 17 .…”

“…Bone cuts that are perpendicular to each other, creating a stress riser in the ulna, have been identified as a predisposing factor for an olecranon fracture 17 . In one study, comparing different ulnar ostectomies, the ulna retained a higher strength if it was prepared with a rounded rather than a 90° cut 16 . Dog 5 was the smallest dog included in the study.…”

Trabecular Pattern of the Proximal Ulna: A Morphological Study

“…Nichol observed similar fractures on static loading to normal cadaveric ulnas with polyethylelne ulnar components of Souter–Strathclyde elbow replacement . It is likely that a radiused ulnar component through a round cut avoids the stress raisers of a square cut at corners and is adopted to resist loads better by minimizing the interruption of trabeculae compared to a square cut .…”

“…Olecranon fractures are reported in up to 5% of cases following total elbow replacements [7]–[9]. Associated bone loss, a narrower olecraonon in the anteroposterior direction, osteoporosis, rheumatoid arthritis, bone defects in post-traumatic arthritis and bone removal to place the prosthesis during total elbow replacement, are among the factors potential contributing to olecranon fractures [7]–[9]. Nichol observed similar fractures on static loading to normal cadaveric ulnas with polyethylelne ulnar components of Souter–Strathclyde elbow replacement [10].…”