ArcPhix™ Functional Flexion Compression Screw System

Overview

The ArcPhix Angled Compression Screw is specially designed to achieve functional flexion and stable fixation of the distal interphalangeal (DIP) joint during bone fusions, offering improved finger dexterity and grip strength. Its 18° compressive construct facilitates anatomic positioning of the fusion posture, providing surgeons with an automatic, angled fusion using a standard insertion technique.

Indications For Use

The ArcPhix is indicated for use in the surgical fixation of small bones, bone fragments, and osteotomies. The device is not indicated for soft tissue fixation.

Related Documents

DIP Joint Fusion with Functional Flexion

While most current treatment methods for late-stage arthritis in phalangeal joints may provide suitable outcomes, there is likelihood of straight, DIP joint fusions, which are not optimal.

Research has shown that when a patient's DIP joint is fused in a functional position, finger dexterity and grip strength improve compared to that of a patient with a straight, full extension fusion.1

Physicians can achieve angled fusions by using K-wire fixation, however, the surgical technique may inadvertently produce a straight fusion and the immobilization protocol can lead to several complications and suboptimal results. Similarly, compression screws do not offer the additional benefit of functional flexion.

Functional flexion is fusion of the DIP joint in a curved position that allows the distal end of the phalanges to maintain functionality. This enables patients to better perform activities that require grip strength and dexterity, such as holding a cup, playing an instrument, or gripping a golf club.

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A New Standard for DIP Joint Fusions

The ArcPhix Intramedullary Angled Compression Screw sets a new standard by offering a design that is specifically sized to optimally fit the anatomy of the distal and middle phalanges. The pre-bent design simplifies the process of constructing a clinically appropriate angle for DIP joint fusions with functional flexion.1 The early mobilization achieved prevents stiffness that often occurs with other techniques and offers patients the ability to minimize recovery time.

The system is provided sterile, where the implants are single-use with a disposable instrument kit containing all necessary instrumentation to perform the case.

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Features

  • Angled screw allows for fusion of the DIP joint in a functional position.
  • Specifically sized to optimally fit the anatomy of the distal and middle phalanges.
  • Differential thread pitch facilitates compression across the DIP joint to create stability during bone fusion.
  • Percutaneous insertion method minimizes soft tissue damage and device prominence on fingertip.

Key Benefits

  • Functional flexion

    Improved grip strength and dexterity compared to straight, full extension fusion1

  • Immediate to early, active mobilization

    Early mobilization prevents stiffness that often occurs with other techniques and offers patients the ability to minimize recovery time

  • Minimally invasive

    Minimally invasive with no secondary procedure or immobilization required

  • Surgical efficiency

    Pre-bent design simplifies the process of constructing a clinically appropriate angle for functional fusion of the DIP joint

Videos

System Overview
Learn how ArcPhix sets a new standard for DIP joint fusion.
Surgical Technique
See ArcPhix’s surgical technique that simplifies DIP joint fusion to achieve functional flexion.
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References

1. Melamed E, Polatsch DB, Beldner S, Melone CP Jr. Simulated distal interphalangeal joint fusion of the index and middle fingers in 0° and 20° of flexion: a comparison of grip strength and dexterity. J Hand Surg Am. 2014 Oct;39(10):1986-91.