Bitewings are recommended every 12-18 months and are taken to radiographically diagnose the presence of interproximal caries (i.e. cavities between teeth). A full mouth or Panoramic x-ray should be taken every 36 – 60 months. This x-ray is diagnostic, in that it shows the entire mouth, and any anomalies / pathology of the hard tissues that may exist. Once identified, appropriate treatment can be rendered. It also provides the clinician a means to evaluate the level of bone, any abscesses or abnormalities which should ordinarily not be present.