Swampscott dentist knows the drill on sleep apnea

SWAMPSCOTT — A local dentist, who has grown tired of his patients not knowing the dangers that surround undiagnosed sleep apnea, is putting his money where his mouth is. Ronald Plotka, of North Shore Dentist, has been practicing in Swampscott for 48 years. In December of 2015, his office bought a Sirona Orthophos SL cone…