Adjunctive surgical procedures may be performed simultaneously with Le Fort I osteotomy (LF1) to ensure adequate paranasal augmentation.

The objective of this systematic review is to integrate current knowledge on concurrent local surgical methods to supplement LF1 to enhance paranasal volume.

Twenty-two studies involving 463 patients were reviewed. Four subgroups of local surgical adjuncts were identified. Subgroup 1 (9 studies, 245 patients) consisted of high and quadrangular Le Fort I modifications. This subgroup had the most robust evidence in terms of paranasal volume augmentation and stability. Subgroup 2 (6 studies, 83 patients) consisted of pedicled buccal fat pad (BFP) and free intra-oral autogenous bone block grafts. While the two types of grafts were shown to be useful in paranasal augmentation, there are insufficient long-term studies to demonstrate their stability. The third subgroup (4 studies, 103 patients) had no reported complications and showed good stability, but the amount of augmentation was modest. The last subgroup (3 studies, 32 patients) had the weakest degree of evidence.

All four types of surgical adjuncts demonstrated clinical benefit based on subjective outcome assessments. However, given the predominance of low-level evidence, firm conclusions regarding efficacy cannot be drawn. When compared, subgroup 1 showed the best evidence whereas subgroup 4 showed the least. Subgroup 2 lacked evidence in stability while subgroup 3 showed limited amount of paranasal augmentation.