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Table 2 The ASA classification

From: Outcomes of treatment with short dental implants compared with standard-length implants: a retrospective clinical study

ASA PS classification

Definition

Group I

A normal healthy patient

Group II

A patient with mild systemic disease

Group III

A patient with severe systemic disease

Group IV

A patient with severe systemic disease that is a constant threat to life

Group V

A moribund patient who is not expected to survive without the operation

Group VI

A declared brain-deal patient whose organs are being removed for donor purposes