The use of hypotensive anesthesia in orthognathic surgery may reduce the intraoperative blood loss (low certainty evidence).

The use of hypotensive anesthesia in orthognathic surgery may make little or no difference to operation time (low certainty evidence).

The use of hypotensive anesthesia in orthognathic surgery may improve the quality of surgical field (low certainty evidence).

No studies were found that reported adverse effects or even mortality associated to hypotensive anesthesia in orthognathic surgery.