Utility of Postoperative Mandibulomaxillary Fixation After Rigid Internal Fixation of Isolated Mandibular Fractures:

Facial Trauma Management During the Coronavirus Disease 2019 Pandemic

IMPORTANCE

Facial trauma is managed with open or closed treatment modalities; however, the impact of the coronavirus disease 2019 (COVID-19) pandemic on facial trauma management remains unclear.

OBJECTIVE

To determine whether the management of facial trauma varied during the COVID-19 pandemic.

DESIGN SETTING, PARTICIPANTS

A retrospective review of 127 adults at The R Adams Cowley Shock Trauma Center at the University of Maryland between March 2019 and March 2021. Adults were stratified into pre-COVID (before March 2020) and post-COVID groups.

MAIN OUTCOMES AND MEASURES

Open reduction internal fixation alone, maxillomandibular fixation (MMF) alone, Open reduction internal fixation and MMF, and closed reduction.

RESULTS

Of the 127 patients, 66 were treated pre-COVID (52%) and 61 post-COVID (48%). While the prevalence of mandible fractures did not differ (pre-COVID, n = 39, 59%; post-COVID, n = 42, 69%; P = 0.33), the use of MMF alone decreased (pre-COVID, n = 9, 23%; post-COVID, n = 1, 2%; P = 0.005). In contrast, while the prevalence of displaced nasal bone fractures decreased (pre-COVID, n = 21, 32%; post-COVID, n = 4, 7%; P = 0.0007), management with closed reduction did not differ (pre-COVID, n = 23, 96%; post-COVID, n = 11, 85%; P = 0.27).

CONCLUSIONS AND RELEVANCE

Although the clinical characteristics of patients with facial fractures did not differ during the COVID-19 pandemic, the use of MMF for mandible fractures changed significantly.

LEVEL OF EVIDENCE

Level IV.

A new classification of mandibular fractures

There is no accepted method of reporting mandibular fracture that reflects incidence, treatment and outcome for individual cases. As most series include anatomical site only for all fractures, the aim was to establish a new method to report fractures based on a systematic review of the literature and an internal audit. The classification proposed is: Class I; condyle, II; angle, IIc; II+condyle, III; body/symphysis, IIIc; III+condyle, IV; multiple fractures not including condyle, IVc; IV+condyle, V; bilateral condyle±other fracture(s). A total of 10,971 adult and 914 paediatric cases were analyzed through systematic review, and 833 from the regional audit. Only 32% (14/44) of reported series could be reclassified which, when added to the audit data, showed Class IV was most common (29%), with similar proportions of Class III, Class IIIc and Class II (18-23%). External validation (literature review) in terms of treatment and outcome was non-informative, but the internal validation (audit) demonstrated an increasing requirement for adding maxillomandibular fixation (MMF) to open reduction and internal fixation (ORIF) as class increased. The heterogeneity of data reporting found in the systematic review confirms the need for a classification such as this, likely to enhance comparison of varying management protocols.