Effects of posterior distraction forces on anterior column intradiscal pressure in the dual growing rod technique

Conclusions Posterior distraction forces result in anterior disc separation (distraction) and are distributed across multiple levels rather than delivered to the disc immediately adjacent to a foundation. Constructs with upper foundation hooks had lower distraction forces possibly due to hook motion during distraction. The load distribution at multiplelevels may assist with curve control and may affect vertebral growth. The distraction forces may not be kyphogenic as is commonly believed.