Looking at a full mouth series of radiographs you note that an impacted retained primary root tip can be observed between the right mandibular second premolar and the first molar in the premolar periapical radiograph. You note that the root tip appears to have "moved" mesially in the molar periapical radiograph. Which of the following is true regarding the impacted retained primary root tip?
◦ It is located on the lingual.
◦ It is located on the buccal.
◦ An additional radiograph would be required to determine the buccal or lingual location of the impacted retained primary root tip.
Landmarks of the Area Around the Mouth
The Four Primary Drug-Receptor Families
Three series of overlapping deletions in the A cistron of the rII locus