Lingering office conflicts create animosity between staff and reduces the productivity of the team. Practice fiction and negative attitudes lower office morale. If one person on your staff is a trouble maker, you must ask yourself if you really need the hassles and the negative behavior in your practice. If staff members are able to voice ideas and suggestions openly for team discussion, a consensus can be reached - avoiding arguments. Treat all staff members equally.
Favoritism promotes conflict and competition.
Put your office policies in writing in a simple office manual. If your policies are firm, consistent and enforced, you will limit the climate for office conflicts to grow. Ensure that all team members have clearly defined responsibilities. Of course there will be overlap in some areas but each team member should know specifically what they are accountable for on a daily basis.