| NIDR | National Institute of Dental Research |
|---|---|
| NNDC | National Naval Dental Center |
| PDB | Paget disease of bone; paradichlorobenzene; patient's database; phosphorus-dissolving bacteria; prev... |
| PDH | past dental history; phosphate dehydrogenase; position-of-the-dynamometer-handle [test]; progressive... |
| QHDS | Queen's Honorary Dental Surgeon |