Yes indeed it is very much imperative to go for crown for simple two reasons. Firstly it will protect the tooth from getting fractured as tooth become brittle after root canal treatment. Secondly it will help to save your filling after root canal as it can also come out in future leading to failure of treatment.
Next Steps
Get crown before it's too late.
Health Tips
Make sure it's a good quality aesthetic crown as it's a case of front tooth.