Toe Implants

HemiCAP® Toe DF (1st Metatarsal)

Dual implant curvatures improve dorsal roll-off during dorsiflexion

6 Month Post Op Radiograph

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HemiCAP® Toe Classic (2nd Metatarsal)

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Arthrosurface® offers two HemiCAP® systems, the DF (Dorsal Flange) and the Classic Toe HemiCAP® with no flange. The DF incorporates an anatomic dorsal curve and extension to improve dorsal roll-off and to prevent osteophyte regrowth. The Toe Classic is primarily used in early disease where a simple resurfacing will suffice or for the Lesser Metatarsals. Each one is available in a variety of different convexities designed to fit the implant to your patient’s native anatomy.

Product Features

DF

  • Screw based fixation provides an implant construct with proven fixation history
  • DF dual implant curvatures improve dorsal role-off and osteophyte regrowth
  • Super smooth articulating cobalt chrome surface to minimize wear on the opposing side
  • Conical shaped screw to optimize bone-screw interface
  • Minimal bone removal allows for future fusion if necessary – “No Bridges Burned”
  • Anatomic inlay of Toe Classic maintains the length of the 2nd metatarsal
  • Standardized thread pitch for precise depth and decompression
  • Proven clinical history with over 20,000 MTP implants

Surgical Technique

Toe_STThe Toe HemiCAP® implant system is comprised of two parts, an articular cap and a fixation component. The instruments are organized in the order of surgery, proceeding from left to right and top to bottom. The procedure begins with a guide to identify the size of the metatarsal head. Then place the guide wire perpendicular to the head. A step drill is used to prepare the screw hole before the fixation component is advanced (joint decompression can be adjusted by advancing the screw 2-4mm). The uniquely designed instruments are used to map the contours of the patient’s native surface curvatures using the fixation component as a central axis.  A reamer then removes the damaged cartilage to create a socket for the implant. If using the DF HemiCAP®, a second reamer is inserted into the screw to ream the dorsal socket. Place the trial to assess proper implant fit. After, any osteophytes or boney edges are trimmed off around the implant so bone and cartilage surfaces surrounding the implant are flush. Once the surface preparation is complete, the HemiCAP® implant is positioned and seated with several taps of the mallet.

Advantages for the Patient

SurgeonPatientHemiCAP® technology was designed so patients can continue working and retain an active lifestyle without compromising future treatments.

  • May be performed on an outpatient basis
  • Allows for preservation of bone and soft tissues
  • Bridges the gap between biological therapies and joint fusion
  • Clinical studies demonstrate positive clinical outcomes at 5-7 years
  • Maintains existing joint biomechanics thereby allowing normal motion
  • Patients experience a rapid return to activity for both work and exercise
  • Patients report pain relief, rapid recovery and  range of motion improvements

Advantages for the Surgeon

SurgeonAdvantages

  • The HemiCAP® procedure is intuitive and easy to learn
  • The minimally invasive outpatient procedure typically takes less than an hour
  • Soft-tissue envelope and native joint biomechanics are maintained
  • Skeletal anatomy and bone stock are preserved allowing future fusion or total toe
  • Phalangeal surface reamer allows for a controlled chielectomy
  • The two components are connected together via morse taper, with zero reported loosening

Both Toe HemiCAP® systems are approved for use in the USA, CE Marked countries and many other markets around the world.