Summary: worse (see Page 539 ). In a child over 6 or 7 years old, braces usually do not help. In extreme cases, surgery may be needed. Knock-knees may also lead to flat feet. CLUB FEET About 3 out of 1,000 children are born with a club foot (or feet). Sometimes it runs in the family, but usually the cause is unknown. Sometimes a newborn baby's feet turn inward,
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