Geometric anatomy of minimally invasive hallux valgus surgery fixation: A case report

Abstract

Minimally invasive osteotomy and fixation techniques for the hallux valgus deformity have returned to contemporary popularity in reconstructive foot and ankle surgery. The objective of this investigation was to perform a geometric analysis of this fixation construct. We present the case of a 43 y/o female who underwent a minimally invasive uniplanar perpendicular metatarsal osteotomy fixated with two 4.0 mm cannulated screws. The two screws encompassed 11.5 % of the cross sectional area of the first metatarsal at the location of the osteotomy and 7.8 % of the volume of the capital fragment. We conclude that despite a relatively unique radiographic appearance, the hardware construct for minimally invasive hallux valgus correction involves a small percentage of the cross-sectional anatomy of the first metatarsal osteotomy and volume of the capital fragment.

Keywords

• Bunion
• Hallux abductovalgus
• HV
• MIS
• MICA
• Geometry