Hallux valgus according to Austin / Chevron
Case Study & Literature on Shark Screw®
The following case documentation shows the pre- and postoperative course of a hallux valgus correction according to Austin / Chevron. The patient was treated with a screw made of human bone (Shark Screw®). Brcic e. al. showed in 2021 that Shark Screw® is colonized by cells within a few months and, like other allografts, remodels into its own bone.1
Case study hallux valgus after Austin / Chevron:
The intermetatarsal angle is well below 20° in the loaded foot, so the Austin / Chevron subcapital metatarsal osteotomy is used.
The patient complained of persistent pain before hallux valgus surgery. These could be permanently gelid by the hallux surgery. Since Shark Screw® is made of human donor bone (allograft), the patient bears no risk of metal removal after Austin / Chevron hallux valgus surgery.2
Surgical Technique
The most common surgical technique for hallux valgus after Austin / Chevron can be found in this hallux valgus after Austin / Chevron surgery video or in these surgical instructions for hallux valgus surgery after Austin / Chevron.
X-ray image preoperatively
Hallux valgus, right
X-ray postoperatively, oblique
Lying Shark Screw® graft recognizable. Correction by subcapital metatarsal osteotomy according to Austin
8 weeks postoperatively
Good build through of the osteotomy and good hold of the graft
6 months postoperatively
Good insertion and remodeling of the bone screw - graft only rudimentarily visible
“As a private physician, it is important to me that I can provide my patients with the best possible, safe and innovative care, and I am able to do this excellently with Shark Screw®. I save my patients the risk of a second operation for metal removal, which is important to me and my patients.”
Case study provided by Dr. Klaus Pastl | orthopedist and foot specialist in Linz / Austria.
How to stay up to date as an orthopedist:
1 Brcic I, Pastl K, Plank H et al. Incorporation of an allogenic cortical bone graft following arthrodesis of the first metatarsophalangeal joint in a patient with hallux rigidus. Life (Basel). 2021, 11.
2 Pastl K, Schimetta W. The application of an allogeneic bone screw for osteosynthesis in hand and foot surgery: A case series. Arch Orthop Trauma Surg. 2021.