J Korean Orthop Assoc.  2000 Oct;35(5):711-717.

Deformity Correction of the Knee and Leg Lengthening by the Ilizarov Method in Children with Vitamin D Resistant Rickets

• Choi IH
• Kim JK
• Chung CY
• Cho TJ

Abstract

PURPOSE
The purposes of this study were to evaluate the efficacy of deformity correction of the knee and leg lengthening by the Ilizarov method in patients with vitamin D resistant rickets (VDRR) .
MATERIALS AND METHODS
There were 7 patients with average age of 13 years and 6 months. 5 patients had genu varum and 2, genu valgum. 3 patients underwent deformity correction alone in 4 femora, and the remaining 4 patients underwent concomitant deformity correction and lengthening in 5 femora, and 12 tibiae and fibulae.
RESULTS
Angular correction averaged 22.6. and the amount of lengthening averaged 3.5 cm. The healing index (H.I) averaged 2.1 month/cm. But those who had serum phosphate level more than 2.5 mg/dL showed rapid regenerate bone healing (H.I: 1.6 month/cm) . There was a statistically negative correlation between H.I and the level of serum phosphate.
CONCLUSION
Maintenance of appropriate serum phosphate level (> or = 2.5 mg/dL) is important for satisfactory regenerate bone healing in due time in patients with VDRR. The recurrence rate of deformity appears to be relatively higher in immature patients.

Keyword

Vitamin D resistant rickets; Ilizarov; Level of serum phosphate; Healing index

MeSH Terms

Child*
Congenital Abnormalities*
Familial Hypophosphatemic Rickets*
Fibula
Genu Valgum
Genu Varum
Humans
Ilizarov Technique*
Knee*
Leg*
Recurrence
Tibia
Vitamin D*
Vitamins*
Vitamin D
Vitamins