Hi there,unfinished root canals can develop infections again and can lead to spread of infection in surrounding teeth , damaging more of adjacent teeth due to retrograde infection and multiple teeth abscesses...I would recommend to surely finish root canal asap .it's mandatory..
Next Steps
permanent filling is again. very important to have a good seal to ur root canal treated tooth with a cap which would increase the life of tooth by many years.
Health Tips
until u r getting ur RC completed...please go for regular irrigation n change of dressing..the cotton is kept inside in a incomplete RC ..which gets spoilt if kept long..so change of dressing equally important