Impact of Protective Headgear on Maxillofacial Fracture Patterns: An Autopsy-Based Study of Two-Wheeler Fatalities

Abstract

Background: Maxillofacial trauma is a devastating component of road traffic injuries among motorized two-wheeler occupants. While helmets are universally acknowledged to prevent severe traumatic brain injuries, their specific protective impact on mid-face and mandibular fracture topographies requires closer forensic analysis. Objectives: To evaluate the protective efficacy of headgear on facial bone fracture patterns, distribution of soft tissue facial trauma, and specific Le Fort fracture lines among fatal two-wheeler accidents. Materials and Methods: An observational autopsy study of 100 fatal traumatic maxillofacial injury cases conducted at SMS Medical College, Jaipur between September 2024 and January 2025. Within the broader cohort, a nested analysis of 48 two-wheeler occupants was executed to directly compare fracture severities between helmeted and non-helmeted riders. Results: Two-wheeler occupants constituted 48% of the total maxillofacial trauma cohort. Among these 48 riders, 68.8% (n=33) were completely non-helmeted, whereas only 31.2% (n=15) were wearing a helmet at the time of the impact. Non-helmeted riders exhibited a significantly higher density of complex skeletal injuries, with maxilla fractures (28% overall) and mandible fractures (27% overall) dominating the structural landscape. Severe pan facial and midface splits were recorded exclusively in the non-helmeted group, including 10 distinct cases of Le Fort fractures where Le Fort Type III (5 cases) and Le Fort Type II (4 cases) were highly prevalent. In contrast, helmeted riders sustained primarily isolated zygomatic cracks (24% overall) or localized soft tissue abrasions (73% overall) without profound basal or midface comminution. Coma was the final mode of death in 60% of all subjects, driven heavily by underlying head injuries (63%). Conclusion: Standard protective headgear provides a striking shield against complex midface disruptions and compound jaw fractures. Non-helmet usage triggers high-energy transfer vectors that shatter the weak midfacial skeleton along Le Fort lines. Routine forensic autopsies should focus heavily on validating full-face vs. half-face helmet wear styles during collision reconstruction.

Keywords: Maxillofacial trauma, Helmet use, Le Fort fractures, Road traffic accidents, Autopsy.