Paper #25: Quantifying the 'Law of Diminishing Returns' in Magnetically Controlled Growing Rods.

Ahmad, Adil; Subramanian, Thejasvi; Panteliadis, Pavlos; Wilson-Macdonald, James; Rothenfluh, Dominique; Nnadi, Colin · Spine Deform · 2017

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Abstract

The 'law of diminishing returns' can also be observed following serial distraction in MCGR. In comparison to previously published data for CGRS, there is a gradual linear decline as opposed to a rapid initial decline in lengthening. In the older, heavier child a reduced distraction ratio in the concave rod of the MCGR device is noted over time.