A major cellular event occurring during neurulation is convergent extension, a morphogenetic process by which the presumptive notochord and neural plate lengthen and narrow due to the mediolateral intercalation of cells [ Ueno and Greene, 2003; Wallingford et al., 2002].
Further studies should be directed to comparing LON with lengthening and then nailing (LTN) and plate after lengthening (PAL).
Studies using homozygous Mmp-9-null mice revealed its requirement for angiogenesis and ossification of the developing growth plate since these mice exhibited delayed apoptosis, ossification, and vascularization of hypertrophic chondrocytes, resulting in progressive growth-plate lengthening [ 6].
This concept is supported by the results of an experiment in rabbits with Achilles tenotomy to unload the tibial growth plates during lengthening (Sabharwal et al. 2005).
The independent roles of Mg additions are to promote the T1 precipitation, decrease activation energy for the growth of θ′ plates and reduce lengthening rates of T1 and θ′ plates.
The technique of two-level femur osteotomy stabilized with a plate and lengthening nail yielded excellent results with acceptable correction of deformity, full knee extension, and improved function.
Early substitution to plate internal fixation after lengthening by external fixation is a method that facilitates patient recovery.
He went on to investigate the technique of lengthening then plating.
Lengthening then plating has complications such as breakage of the implant when there is delayed maturity of the distraction callus [12].
To reduce the duration of the fixator and its interference with progress with physiotherapy, a second surgery was performed 3 months after the first and in accordance with the strategy of lengthening then plating.
Humerus lengthening was first reported by Dick and Tietjen (1978) using a Wagner lengthening device, plating, and autogenous bone graft.
