Mazhar, B.; Younus, S.; Akhtar, U. B.; Altaf, A.; Javed, F.; Sajid, M. A. H. COMPARISON OF POSITIVE ASPIRATION DURING INFERIOR ALVEOLAR NERVE BLOCK USING CONVENTIONAL METALLIC DENTAL SYRINGE VS. DISPOSABLE PLASTIC SYRINGE. PAFMJ 2020, 70, 1539-43.