Electromyography assessment in zygomaticomaxillary complex fractures.
OBJECTIVE
The aim of this study was to assess the activity of the masseter and temporalis muscles using surface electromyography (EMG) in patients with zygomaticomaxillary complex (ZMC) fractures.


METHODS
This prospective study was carried out on 25 patients who had ZMC fractures. Fifteen patients were managed by open reduction and rigid fixation (ORIF) using titanium miniplates. This study, using surface electromyography, analyzed the activity of the masseter and temporalis muscles of 25 patients with ZMC fractures; 15 of them were surgically treated under general anesthesia (GA). Evaluations were made before surgery and 6 weeks after surgery by recording the mean of muscle contraction of 20 motor unit action potential (MUAP) against resistance, and statistical analyses were performed.


RESULTS
A significant EMG difference between the normal and ZMC fracture sides was found (P < 0.0001) for both masseter and temporalis muscles and was significantly improved after ORIF. However, postoperative EMV values of the repaired side was significantly less than measured postoperatively in the normal side (P < 0.0001) for both muscles.


CONCLUSIONS
ZMC fractures significantly diminish muscular activity of the masseter and temporalis and even though significant recovery of muscle activity was revealed after 6 weeks, it is still less than normal activity, highlighting the importance of postoperative rehabilitation.
Otorhinolaryngology-Head and Neck Surgery Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt. mwenteg@yahoo.com.
Mohammad
M
Waheed El-Anwar
Otorhinolaryngology-Head and Neck Surgery Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt.
Ezzeddin
E
Elsheikh
Otorhinolaryngology-Head and Neck Surgery Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt.
Ahmed Hassan
AH
Sweed
Rheumatology and Rehabilitation department, Faculty of Medicine, Zagazig University, Zagazig, Egypt.
Nillie
N
Ezzeldin
D000293:Adolescent; D000328:Adult; D004576:Electromyography; D005260:Female; D005592:Fracture Fixation; D006801:Humans; D008297:Male; D008406:Masseter Muscle / Q000503:physiopathology; D008440:Maxillary Fractures / Q000503:physiopathology* / Q000601:surgery; D008875:Middle Aged; D013703:Temporal Muscle / Q000503:physiopathology; D055815:Young Adult; D015051:Zygomatic Fractures / Q000503:physiopathology* / Q000601:surgery
Electromyography; Fracture zygoma; Internal fixation