Mum permanently disfigured by dentist during routine root canal surgery
![Mum permanently disfigured by dentist during routine root canal surgery](https://i2-prod.mirror.co.uk/incoming/article33032984.ece/ALTERNATES/s615/1_Mum-left-permanently-disfigured-by-dentist.jpg)
Claire Shorrock experienced a 'terrifying' face swelling after a dentist failed to put in a preventative guard before starting a root canal treatment at her practice in Preston, Lancs.