The decay was so close to the pulp (nerve), almost touched! Eventually we managed to remove all the dental caries and do a dental filling with nerve protection. The tooth hasn't had any pain since the filling but it still has a question mark in long term, which means the tooth may still need root canal treatment in the future. That's why we always recommend 6 monthly checkup and clean, so we can treat dental diseases at early stage to avoid more complicated and expensive procedures.