{
  "package" : "hl7.terminology.r4@6.3.0",
  "definition" : "The surface of a tooth that is closest to the midline (middle) of the face.",
  "system" : "http://terminology.hl7.org/CodeSystem/ADAToothSurfaceCodes",
  "property" : [ ],
  "codesystem" : "4f12700f-fdf5-5fe0-9386-5823454bc7cf",
  "concept_id" : "0c3bbd0c-e9d7-594e-a541-9bc39bf16ce9",
  "ancestors" : {
    "M" : 0
  },
  "id" : "f50100d2-7768-4166-a672-7b68a0ad0780",
  "code" : "M",
  "display" : "Mesial",
  "version" : "1.0.0"
}