No significant difference was seen between the underlay and over-underlay techniques with respect to graft uptake, re-perforation, retraction, graft lateralisation, Air-Bone Gap or Pure Tone Audiometry result.
All their cases had successful grafts (100%) and lateralisation of grafted drum did not occur.
78 and in this group 04 patients had graft failure and 02 cases presented with graft lateralisation.
Instead, lateralisation may have a genetic basis or alternatively may be influenced by factors in the early embryonic period," they wrote in their paper.
It was therefore likely that lateralisation did not originate in the brain.
The researchers wrote: "The early establishment of pre-natal behavioural lateralisation may have a potentially powerful role in the development of subsequent behavioural lateralisation and brain asymmetries.