$ionicConfig.backButton.text only for certain page?

Hi, I want to special the back button text on some certain page.

$ionicConfig.backButton.text("back");

the above code works, but when I clicked to other pages, all shows the back button with the modify text, I want the back button text changed to the default setting.

How can I do it?

plz advise.

Thx.

some one help me plz? still don’t have a solution.