CD4 and neutropenia: Although Patton et al. (14) found significantly higher rates of postoperative complications following tooth extractions when pronounced immunosuppression (CD4 cell count <200 cells/mm3) and severe neutropenia (neutrophilic leukocytes <500 cells/3) were recorded, most authors have found no association between HIV infection and the occurrence of postoperative problems with other minor oral surgery procedures (21-23).