Table 2.

Fibrous tissue reaction and insertion damage in implanted GPs

Ppy	PpyNT3	Ppy-stim	PpyNT3-stim
2	4	1*	1
2	1	2	2
4	3	4	3
1	2*	2	2
	1
	1

1- Little or no fibrous tissue reaction

2- Fibrous tissue occupying less than 10% of the scala tympani in cross section

3- Fibrous tissue occupying 10–50% of the scala tympani in cross section

4- Fibrous tissue occupying 50–100% of the scala tympani in cross section

^*-Minor insertion damage