The distal chevron osteotomy has proven to be a reliable, reproducible method of bunion repair for mild to moderate deformity. By altering the location and displacement of the osteotomy, the…
Correction of major bunion deformities through the proximal portion of the first metatarsal is widely recognized as the established method of reducing the angle between the first and second metatarsal.3–6…
The primary indication for a chevron osteotomy is symptomatic hallux valgus deformity with a moderate deformity with an intermetatarsal angle of less than 15 degrees. The first metatarsocuneiform joint should…
■ Static structures include the bony architecture of the joints and the ligaments. This bony configuration contributes about 30% of the stability, whereas the remaining 70% of stability comes from the…
Fig. 6.1 Normal frontal (a) and lateral (b) lumbosacral spine radiographs Fig. 6.2 Normal anatomy in the AP projection demonstrated at L3: Superior articular facet (S), inferior articular facet (I),…
Fig. 17.1 Incision Insert a Weitlaner retractor and mobilize the incision medially until it is positioned over the narrow bony coccyx. The coccyx now acts as a rigid “backstop” for…
Fig. 19.1 Slip angle is a value that determines the severity of spondylolisthesis and is higher than 50° in spondyloptosis. It is measured between the perpendicular to a line along…
Fig. 1.1 Sagittal view on computed tomography (CT) showing a pars defect of L5 Etiology In the late 1800s and early 1900s, there were multiple studies attempting to identify the…
Fig. 5.1 The Meyerding grading scale for the severity of a slip is determined by dividing the superior endplate of the caudal vertebra in quartiles, and measuring the location of…
Fig. 8.1 Spino-pelvic alignment in the frontal and sagittal planes Evolution from the quadrupedal to the bipedal posture in primates and humans has been allowed by progressive and very significant…
