"Lewis offset"@en . . . "The Lewis offset is a term for the portion of the central groove on a permanent mandibular first molar which lies between the two central pits. It was named for long time dental anatomy instructor Dr. Christopher S. Lewis, a Mercer Island, WA dentist."@en . . "The Lewis offset is a term for the portion of the central groove on a permanent mandibular first molar which lies between the two central pits. It was named for long time dental anatomy instructor Dr. Christopher S. Lewis, a Mercer Island, WA dentist."@en . . . . . "1622"^^ . . . . . "1091646236"^^ . . . . . . . "30010465"^^ . . . . . . . . . . . . . .