A case of severe facial palsy following bimaxillary osteotomy: It is time to update the pre-surgery patient fact sheet

Facial palsy after orthognathic surgery: A systematic review

It was the aim of the systematic review to evaluate the incidence of facial palsy following orthognathic surgery, and to assess the possible mechanisms of injury, subsequent management, and eventual outcomes. The protocol of this systematic review was registered in the International Prospective Register of Systematic Reviews. A thorough search of PubMed, Scopus, Cochrane Library, and CINAHL databases up to April 2022 was conducted. In total, 34 articles were selected for this review, including 54 facial palsies in 53 patients. The incidence of facial palsy was estimated to range from 0.04% to 0.77%. Most of the possible etiologies proposed involved intraoperative nerve compression or postoperative edema. Physical therapy and steroid administration were the most frequently employed management approaches. Surgical exploration for the facial nerve was executed in one patient. Forty-three facial palsies (79.6%) attained complete recovery with conservative management, whereas 11 facial palsies (20.4%) continued to show incomplete recovery during the follow-up period. Earlier facial palsy onset (timing after surgery) was related to a higher risk of continuing palsy (p = 0.018). Within the limitations of this review it seems that facial palsy following orthognathic surgery should be treated conservatively whenever appropriate.

Dental discoloration following Le Fort 1 osteotomy, a systematic review

INTRODUCTION

This study was conducted to review current knowledge concerning factor and how to proceed with dental discoloration after Le Fort 1 osteotomy (LF1O).

MATERIAL & METHODS

A systematic search of the literature was performed in PubMed/Medline and Cochrane library until December 1, 2020 using the following key words: "dental discoloration and osteotomy", "dental discoloration and Le Fort", "dental discoloration and orthognathic", "dental discoloration and surgery", "tooth discoloration and osteotomy", "tooth discoloration and Le Fort", "tooth discoloration and orthognathic", "tooth discoloration and surgery".

RESULTS

705 studies were located by initial screening; 232 were duplicate, 468 did not meet the eligibility criteria, leaving 5 studies. The post-operative follow-up period of the included studies ranged from 6 months to 2 years.

CONCLUSION

The present revue found dental discoloration can occur after LF1O in 3.56% of the cases. The follow-up before treatment should be around one years. If the discoloration persisted and pulpal sensibility test is negative, the tooth should be treated. If the pulpal sensibility test is positive, follow-up should be carry on.