Dual Fixation of Calcaneal Tuberosity Avulsion with Concomitant Achilles Tendon Rupture: A Novel Hybrid Technique

Calcaneal Tuberosity Fracture With Complete Achilles Tendon Rupture: A Unique Surgical Challenge

A calcaneal tuberosity avulsion fracture occurring simultaneously with a rupture of the Achilles tendon, although occurring through similar mechanisms, is a rare injury pattern to see in combination and presents a unique challenge to the surgeon. The patient we present was initially found to have a type II fracture of the calcaneal tuberosity. However, during surgical fixation of the fracture, a complete rupture of the Achilles tendon was noticed. The technique used in this case was the fixation of the fracture fragment with two 5 mm fully threaded screws. The tendon was then reattached to the calcaneus using two Mitek anchors (DePuy Mitek Inc., MA, USA) with a modified Bunnell technique. There are a number of techniques suggested in the literature, including, among others, K-wires (DePuy Mitek Inc., MA, USA) and screw fixation. Our patient recovered well and has now been discharged from further orthopaedic follow-up.

Case presentation: Concomitant avulsion fracture of the posterior calcaneal tubercle and rupture of the Achilles tendon

The Achilles tendon acts by transmitting the force created by the contraction of the sural triceps to the calcaneus. This allows the elevation during the gait cycle. A sudden contraction in elderly patients may generate avulsion fracture of the posterior tubercle of the calcaneus due to poor bone quality or rupture of the tendon, with one of these two structures yielding in most cases. We report the case of a 72-year-old woman who suffered a low energy right heel trauma while stepping off the bus. She was diagnosed an avulsion fracture of the posterior tubercle of the calcaneus. When performing ORIF procedure of the fracture, an associated rupture of the Achilles tendon is diagnosed. Both pathologies are treated in the same surgical act. We recommend using a second imaging study along with the x-ray in order to anticipate associated injuries and adequate surgical planning in elderly patients.

Tendon healing in the context of complex fractures

Tendons connect muscle to bone and play an integral role in bone and joint alignment and loading. Tendons act as pulleys that provide anchorage of muscle forces for joint motion and stability, as well as for fracture reduction and realignment. Patients that experience complex fractures also have concomitant soft tissue injuries, such as tendon damage or rupture. Tendon injuries that occur at the time of bone fracture have long-term ramifications on musculoskeletal health, yet these injuries are often disregarded in clinical treatment and diagnosis for patients with bone fractures as well as in basic science approaches for understanding bone repair processes. Delayed assessment of soft tissue injuries during evaluation of trauma can lead to chronic pain, dysfunction, and delayed bone healing even following successful fracture repair, highlighting the importance of identifying and treating damaged tendons early. Treatment strategies for bone repair, such as mechanical stabilization and biological therapeutics, can impact tendon healing and function. Because poor tendon healing following complex fracture can significantly impact the function of tendon during bone fracture healing, a need exists to understand the healing process of complex fractures more broadly, beyond the healing of bone. In this review, we explored the mechanical and biological interaction of bone and tendon in the context of complex fracture, as well as the relevance and potential ramifications of tendon damage following bone fracture, which has particular impact on patients that experience complex fractures, such as from combat, automobile accidents, and other trauma.