Tricuspid Valve Mass

Differential for non-infective valvular masses:
-Rheumatic fever
-Atrial Myxoma
-Libman-Sachs (marantic endocarditis or nonbacterial thrombotic endocarditis)
-Vasculitis, Temporal Arteritis, Connective Tissue Disease
-Cholesterol emboli syndrome
-Fen/phen-induced valvular heart disease
-Carcinoid (which has a predilection for right sided valves)

The incidence of infective endocarditis secondary to dental procedures is low, and thus RTCs are lacking.  One of the landmark studies however is Dental and cardiac risk factors for infective endocarditis: A population based, case-control study. This study showed that the incidence of infective endocarditis in their population of those with dental procedures is 5.14 out of 100,000 person years, and that even at 100% effectiveness, antibiotic prophylaxis would only reduce the incidence of IE by 2.0 cases per 1,000,000 person years.

Two other studies that Suvi pointed out for us as quality reads are the following:
Infective Endocarditis; Lancet 2016
Infective Endocarditis: Diagnosis, Antimicrobial Therapy, and Management of Complications: A Scientific Statement for Healthcare Professionals from the American Heart Association; Circulation 2015