Turf Toe & Plantar Plate Injuries

The metatarsophalangeal joints of the forefoot — particularly the first and second MTP joints — are stabilized on their plantar surface by a complex of structures including the plantar plate, the collateral ligaments, the flexor tendon sheath, and the sesamoids. Together these structures form what is sometimes called the plantar complex. Injuries to this complex are among the most commonly undertreated and undertreated foot conditions in active patients.

Turf toe is the common name for an acute sprain of the plantar capsulo-ligamentous complex of the first metatarsophalangeal joint, typically caused by forced hyperextension of the big toe — the toe bending violently upward as the foot is planted on a hard or artificial surface. The name reflects its original association with athletes competing on artificial turf, where the surface provides less energy absorption than natural grass and the shoe-surface interface allows greater toe dorsiflexion under load. The injury produces immediate pain, swelling, and stiffness at the first MTP joint with significant limitation of push-off.

Turf toe is graded by severity. Grade I injuries involve a stretch of the plantar complex without structural disruption. Grade II injuries involve partial tearing of the capsule and plantar plate. Grade III injuries involve complete disruption of the plantar complex, often with sesamoid involvement. Grade III injuries — the most severe — can produce persistent instability of the first MTP joint and may require surgical reconstruction for adequate stabilization.

Plantar plate tears at the second MTP joint represent a distinct but related entity that is more commonly seen in general podiatry practice than classic turf toe. The second MTP plantar plate is uniquely vulnerable because of its biomechanical loading — particularly in patients with a relatively long second metatarsal, hallux valgus that transfers lateral force to the second toe, or prior capsulitis that progressively weakened the plate over time. The presentation differs from turf toe: onset is typically more gradual rather than from a single acute event, pain is located under the second metatarsal head rather than the big toe joint, and the cardinal sign is instability of the second toe — often with the toe drifting upward or crossing over the big toe.

Because second MTP plantar plate tears develop gradually and produce a symptom complex that overlaps with metatarsalgia, capsulitis, and neuromas, they are frequently misdiagnosed or their significance is underappreciated. The Lachman test of the second MTP joint — vertical drawer testing of the toe — is a reliable clinical sign of plantar plate insufficiency. MRI or diagnostic ultrasound confirms the diagnosis and characterizes the extent of the tear.

Dr. Gunter evaluates both first and second MTP plantar complex injuries — using clinical testing, imaging, and a thorough understanding of the biomechanical contributors — before recommending a treatment plan matched to the severity and location of the injury.