Templating a Complex Modular Stem for a THR on a Dysplastic Hip and Planning a Subtractive Osteotomy

Digital solutions bring preoperative planning to the next level. OrthoView, orthopaedic templating software, presents a full range of options and compatibilities available with complex modular prostheses on screen so that the surgeon does not need to memorize them. The surgeon can also identify that the correct amount of offset is achievable with the chosen prosthesis.

One-click scaling with QuickScale in OrthoView allows the surgeon to choose the appropriate orthopaedic template size and identify the preoperative leg length difference — in this case, 20 mm. They can then select a suitable correction method and test it on screen.

The surgeon planned subtractive osteotomy in OrthoView to correct the leg length difference. The position and amount of the resection is identified in OrthoView, as can be seen in the templated image below.

The patient was a female in her late 40s with a long history of DDH. Based on the preoperative X-ray below, it’s evident that she has had previous surgery on her right hip. However, on the left hip, the need for a total hip replacement was identified due to intractable pain.

A subtractive osteotomy was required to shorten the left leg by 20 mm – correcting the preoperative difference and compensating for any lengthening that might result from the THR.

For this patient, the DePuy S-ROM modular stem was chosen for its wide range of sizing options, including independent sizing of sleeve and stem. In addition, the surgeon could confirm the correct amount of offset could be achieved within the S-ROM system.

Materialise OrthoView is a digital templating solution used by orthopaedic surgeons to create detailed preoperative plans quickly and easily from X-ray images. Materialise OrthoView facilitates digital planning and templating for joint arthroplasty and revisions, trauma, limb deformity correction, osteotomy, and spinal assessment. It is chosen by hospitals worldwide to complete their target of film-free radiology.