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A recent benefit enhancement from Delta Dental of Michigan, Ohio, Indiana, and Tennessee, in Okemos, MI, expands group coverage for patients with certain heart conditions to help them avoid infective endocarditis, a deadly heart infection. The Delta Dental plan is the first dental benefits carrier in the United States to offer such coverage. The only problem, says one expert, is that the hype around important benefit design changes to reflect closer medical-dental integration exceeds the desire for such programs on the part of employers.