Tooth fracture - should I see a prosthodontist or cosmetic dentist?

Horizontal fracture on upper front tooth from trauma 5 days ago. Other front tooth has root canal. Have veneers and told its only a matter of time before crown or implant needed. Will get all 8 veneers replaced. Best to see prospdontist or reputable cosmetic dentist? Do I continue to wear night guard to lessen damage and tighten up teeth or take a break from night guard?