Early Detection and Treatment of Screw Loosening in Triple Pelvic Osteotomy

Abstract

Postoperative radiographic evaluation of screw position at 10 days after TPO is recommended to detect loose screws. Retightening loose screws should be considered as an alternative to TPO revision or confinement, especially in immature dogs.

Acetabular Ventroversion with Double Pelvic Osteotomy Versus Triple Pelvic Osteotomy: A Cadaveric Study in Dogs

“…Complications were reported to occur in up to 8 of 12 dogs after TPO 9 . Screw loosening resulting in implant instability is the most common complication and can occur as early as 10 days after surgery 10 . In an effort to reduce the rate of implant‐related complications associated with TPO, the procedure has been modified using 2 rather than 3 osteotomies of the pelvis 5,11,12 .…”

A biomechanical comparison of conventional dynamic compression plates and string-of-pearls™ locking plates using cantilever bending in a canine Ilial fracture model

“…However, interfragmentary compression achieved with DCP constructs may also accelerate healing. This fracture model also does not account for potentially improved screw purchase with engaging the sacral wing, which has been studied previously with conflicting results [9, 10]. …”

Evaluation of the dorsal acetabular coverage obtained by a modified triple pelvic osteotomy (2.5 pelvic osteotomy)

“…Triple pelvic osteotomy includes three pelvic osteotomies designed to allow the acetabular segment to be rotated ventrally, referred to as acetabular ventro-version (9). A variety of complications have been observed with the TPO technique (10,11,(13)(14)(15)(16)(17)(18)(19)(20)(21). Implant failure and collapse of the pelvis as postoperative complications of the TPO technique are believed to be caused by instability of the ilial fixation secondary to instability at the ischium.…”