Thank you for your question, unfortunately it is not possible to save the perio chart directly as it prints straight out due to the type of template that is used.
I can give you a 'workaround' which may help.
If you have access to a document scanner you can print the perio chart, then scan it back in to the PC and email it to your colleague.
I will forward your request on to the CSR4+ Product Management Team for them to investigate the possibility of introducing this functionality.
Feel free to also log a product idea on the below link.