Torn ligaments of the tarsus

Anatomy: Which ligaments stabilize the tarsus?

The tarsus forms the foundation of the arch of the foot. Several strong ligament complexes connect the small bones of the tarsus to each other and to the metatarsal bones. They enable stability while at the same time elastic power transmission.

• Lisfranc complex (tarsometatarsal joints): dorsal, interosseous and plantar ligaments between sphenoid bones (cuneiforms), base of the metatarsals and the “Lisfranc ligament” (interosseous medial between medial sphenoid bone and 2nd metatarsal bone).
• Chopart joint series: talonavicular joint and calcaneocuboid joint with strong plantar and dorsal ligaments.
• Calcaneonavicular plantar ligament (spring ligament): supports the medial longitudinal arch and works closely with the tibialis posterior tendon.
• Intertarsal ligaments: connect the tarsal bones to each other and secure the transverse and longitudinal arches.

These ligaments transfer loads from the heel and ankle to the forefoot and absorb rotational and shearing forces when walking, running and jumping. A tear leads to instability and can affect arch function.

Causes and mechanisms of injury

Torn ligaments of the tarsus occur due to twisting, falls or direct force. Sports injuries (football, basketball, handball, trail running) are typical, but also traffic accidents or falls from ladders.

• Lisfranc injury: often hyperplantar flexion of the forefoot with axial loading (e.g. step into a hole, opponent falls on the foot).
• Chopart injury: severe inversion/eversion of the hindfoot or high-speed trauma.
• Microtrauma: repeated overuse on hard surfaces or inadequate footwear.
• Direct Violence: Contusion/crush with combined ligament and bone injury pattern.

It is not uncommon for these injuries to initially be misunderstood as harmless distortions. A carefully reported accident mechanism helps to initiate the correct diagnosis at an early stage.

Symptoms: How do you recognize a torn tarsal ligament?

• Acute pain in the midfoot/hindfoot, often emphasized medially.
• Swelling and tenderness over the tarsometatarsal or Chopart joints.
• bruising; a plantar hematoma (under the sole of the foot) is a warning sign of a Lisfranc injury.
• Pain on exertion to the point of impossibility of occurring.
• Feeling of instability, buckling, sometimes “snapping” or “cracking” during an accident.

Stress-dependent midfoot pain, rapid fatigue, lowering of the arch of the foot and difficulty rolling can occur chronically.

When should I seek medical attention?

• Inability to walk or stand four steps.
• Deformity, severe misalignment or increasing swelling.
• Extensive bruising on the sole of the foot.
• Numbness, tingling, cold foot or pale skin (circulatory/nerve disorder).
• Persistent pain > 5-7 days after “kneeling” despite protection.

Early diagnosis improves the chances of recovery and can prevent long-term consequences such as osteoarthritis.

Diagnostics: Examination and imaging

We start with a structured anamnesis (accident mechanism, resilience, previous illnesses) and a focused clinical examination. Important tests include pressure and displacement tests over the tarsometatarsal and Chopart lines as well as stability tests in plantar and dorsiflexion.

• Clinical signs: plantar hematomas, localized tenderness over Lisfranc/Chopart joints, pain on abduction/pronation of the forefoot.
• X-ray while standing (bilateral, AP, lateral, 30° oblique): Assessment of joint space, step formation and diastases. Without strain, misalignments can be overlooked.
• CT: high sensitivity for bony avulsions, fine steps and complex fractures.
• MRI: Depiction of ligament continuity, bone marrow edema and associated injuries; particularly helpful for purely ligamentous, non-displaced injuries.
• Sonography: dynamic assessment of superficial ligaments; can be used additionally.

The classification according to stability (e.g. Lisfranc: stable vs. unstable, diastasis vs. non-diastasis) guides the therapy. Instability under stress is a key decision factor.

Differential diagnoses

• External ligament distortion of the ankle joint (ankle sprain).
• Fractures: Navicular, Cuboid, Cuneiform, Base of Metatarsals.
• Stress fractures in the midfoot (e.g. march fracture).
• Tendon pathologies (posterior tibialis, peroneal tendons).
• Osteochondral lesions of the talus (for pain near the ankle).
• Tarsal cohalition, arthrosis, inflammatory causes.

Therapy – conservative first

Stable, non-displaced tarsal ligament tears can usually be treated conservatively. The aim is to relieve pain, protect healing and gradually build up function.

Regular follow-up checks (clinical and, if necessary, imaging) are important in order to detect instability or malunion early.

Regenerative and complementary procedures

If symptoms persist after a stable ligament tear, regenerative approaches can be considered. The evidence is heterogeneous; an individual benefit-risk assessment is necessary.

• PRP (platelet-rich plasma): can support the healing tendency in chronic ligament irritations; Evidence level is moderate, not suitable for acute unstable injuries.
• Prolotherapy or high molecular glucose injections: discussed in individual cases; limited data.
• Shock wave therapy: especially for pain modulation in chronic myofascial complaints; not in acute instability.
• Ultrasound-assisted injections: increase the precision of infiltrations into pain-causing structures.

We only use regenerative procedures with a clear indication, after information about the evidence-based benefits and in combination with active rehabilitation.

When does an operation make sense?

In the case of unstable, displaced or combined ligament-bone injuries as well as unsuccessful conservative treatment, surgery may be necessary. The goal is to restore joint alignment and stability.

• Lisfranc injury: closed/reduced reduction and screw or plate osteosynthesis; In the case of extensive ligamentous injuries, primary arthrodesis of selected beams may be necessary.
• Chopart injury: reconstruction/transfixation of the talonavicular and/or calcaneocuboid joint; for accompanying fractures combined with osteosynthetic treatment.
• Spring ligament insufficiency: ligament reconstruction if necessary, often in combination with treatment of tibialis posterior dysfunction.
• Follow-up treatment: initial relief (typically 6 weeks), gradual increase in load, physiotherapy. Material removal depending on the situation.

As with any operation, there are risks (infection, thrombosis, impaired wound healing, post-traumatic osteoarthritis, residual pain). The decision is made individually and after detailed information.

Rehabilitation and return to sport

The rehabilitation depends on the injury pattern and the chosen therapy. A structured, step-by-step structure is crucial.

Time window: everyday activities usually after 6-10 weeks, jogging after 10-14 weeks at the earliest (conservative) or later after surgical treatment; Contact sports often only take place after 4-6 months - depending on the course.

Prognosis and possible long-term consequences

With early diagnosis and adequate treatment, the prospects are good. Nevertheless, residual symptoms can occur after tarsal ligament injuries, especially if instability was initially overlooked.

• Favorable factors: stable, non-displaced injury, consistent offloading, structured rehab.
• Unfavorable factors: delayed diagnosis, pronounced instability, accompanying fractures, high sporting stress.
• Possible long-term consequences: post-traumatic osteoarthritis, chronic midfoot pain, arch depression, loss of performance.

Prevention: How to protect the tarsus

• Suitable, well-fitting footwear with sufficient stability.
• Warm-up and targeted balance/proprioception training.
• Gradual training structure; avoid sudden jumps in load.
• Treatment of foot misalignments and ankle instability.
• Careful check of the surface (holes, uneven surfaces).

Our approach in Hamburg

In our orthopedic practice at Dorotheenstraße 48, 22301 Hamburg, we combine careful clinical examination with targeted imaging. Our focus is on conservative, evidence-based therapies and active rehabilitation. Regenerative procedures are offered when appropriate and discussed transparently. In the case of complex or unstable injuries, we coordinate the surgical clarification in a suitable network and closely monitor the follow-up treatment.

We advise you individually on everyday life, work and sport - with clear, realistic expectations and no promises of healing.