. That's faster than a blink, and it's also faster than most people's reflexes can react. In that split second, an airbag can generate enough force to stop a head from continuing forward at 30, 40, or sometimes 60 miles per hour. That force is exactly what saves lives. It's also exactly why so many drivers walk away from a survivable crash with a mouth full of broken teeth.
This is one of the inherent tradeoffs of modern crash protection. An airbag is not designed to provide a gentle cushion. It is engineered to rapidly absorb kinetic energy during a high-speed collision. The force required to stop a person's head and upper body from continuing forward is also enough to create secondary injuries, particularly when the face is close to the steering wheel or when the occupant is leaning forward at the moment of impact.
Dental trauma is therefore not evidence that an airbag malfunctioned. In many crashes, it is evidence that the restraint system successfully prevented a far more serious brain or spinal injury. The legal question is often not whether the airbag caused the dental injury, but what caused the collision that made deployment necessary in the first place. That is why Sutliff & Stout, a Houston law firm known for obtaining high-profile verdicts and substantial settlements in serious motor vehicle cases, frequently investigates the entire sequence of events leading to a crash, including the impact forces, occupant injuries, and the full extent of damages, to determine who is legally responsible for the losses that follow.
The Trade-Off Nobody Talks About
Airbags are statistically one of the most effective safety devices ever put into a vehicle. Airbag deployment combined with seatbelt use has been shown to reduce mortality by as much as 63 percent in head-on crashes. Side airbags alone cut the risk of death by nearly 50 percent in some studies. The National Highway Traffic Safety Administration has credited airbags with saving over 50,000 lives between 1987 and 2017.
But that same force has to go somewhere, and the face is directly in its path. Research analyzing a decade of trauma cases found that facial bone fractures showed up in over a third of patients, dentoalveolar injuries appeared in nearly half, and soft tissue injuries affected almost two-thirds of the cranio-maxillofacial trauma cases studied. Separately, older NHTSA-reviewed data found the face was the single most commonly injured area in airbag-related trauma, at 42 percent, ahead of the wrist, forearm, and chest combined.
Why the Mouth Takes the Hit
The mechanics here aren't complicated once you break them down. An airbag deploying at close range, especially within four inches of the occupant at the moment of peak force, delivers a blunt, high-velocity impact directly to whatever's in its path. For a driver positioned close to the wheel, that's frequently the lower face and jaw.
Fractured Incisors
Front teeth, the incisors, sit in the most exposed position on the face. When an airbag makes direct contact at deployment speed, the enamel and underlying dentin can shear or crack under the blunt force. This isn't the same mechanism as biting down on something hard. It's a sudden, high-energy impact the tooth structure was never built to absorb.
Avulsion
In more severe cases, the impact doesn't just fracture the tooth, it displaces it entirely from the socket. Avulsion is a genuine dental emergency, and the window for successful re-implantation is narrow, often measured in minutes rather than hours.
TMJ Injury
The jaw joint itself can also take damage. A sudden upward or lateral force to the chin or lower jaw can strain or injure the temporomandibular joint, leading to pain, clicking, or limited jaw movement that sometimes doesn't show up until days after the crash.
Crown Fractures
Even when a tooth survives intact, the crown, the visible portion above the gumline, can crack or chip from the impact. These fractures range from minor cosmetic chips to breaks severe enough to expose the tooth's nerve.
Restoration
Whatever the injury, most cases end up requiring some form of dental restoration: bonding, crowns, root canal therapy, or in avulsion cases, re-implantation or eventual replacement. The cost and complexity scale directly with how much force the airbag delivered and how close the occupant was positioned at deployment.
Is This an Airbag Defect, or Just Physics?
This is where it gets legally interesting. One frequently cited pilot study attempted to test whether airbag deployment alone causes measurable tooth wear, and found that a review of the literature and clinical experience did not suggest tooth enamel abrasion was a likely outcome from deployment alone. In other words, the airbag chemical or gas exposure itself likely isn't grinding down enamel. But that finding is narrow. It addresses surface wear, not the blunt-force fractures, avulsions, and jaw trauma showing up consistently in real crash data.
That distinction matters in a claim. Some dental trauma is simply the airbag doing its job under extreme force, an unavoidable trade-off for preventing a much worse head or brain injury. But other cases point to something different: a defective or malfunctioning airbag deploying with excessive or asymmetrical force, a driver positioned dangerously close to the wheel due to seat design, or a seatbelt failure that let the occupant travel too far forward before the airbag engaged.
Why This Matters for a Claim
Dental injuries from airbag deployment are still compensable if another party's negligence caused the crash. The legal question is not whether the airbag caused the injury, but why the airbag had to deploy in the first place and whether the resulting dental damage was a foreseeable consequence of the collision.
Answering that requires more than reviewing medical records. Investigators often analyze crash reconstruction evidence, event data recorder (EDR) data, airbag deployment timing, occupant positioning, and vehicle damage to determine how the injury occurred and whether factors beyond normal deployment contributed to its severity.
Attorneys handling serious motor vehicle cases, including Hank Stout of Sutliff & Stout, regularly work with reconstruction experts and medical specialists to connect that evidence to the injuries claimed. For victims facing costly dental reconstruction, that analysis can be critical to proving both causation and the full value of the claim.