This can be treated either by a composite restoration or a veneer.It would be better if you posted a picture.since you mentioned a part of the tooth is fractured we have to see the fracture involves what part of the tooth

Dear patient, Having a broken front tooth with gaps is very disheartening. A ceramic veneer for both the front teeth to uniformly close the gap would be the best and long-lasting treatment plan. The other option would be to close the gaps using a tooth-colored restorative material. You should go to a dentist who specializes in Aesthetic Dentistry for this work. Hope this helps! -Dr Janhavi Naik Crowns & Roots Nagpur