Subtalar Extra-articular Screw Arthroereisis

Subtalar Extra-articular Screw Arthroereisis: How Does the Screw Work

The aim of the study is to investigate the effect of subtalar extra-articular calcaneo-stop screw on the proprioceptive and nociceptive pathways of the ankle before and after implantation. The hypothesis of the study is that an increased number of receptors related to proprioception will be detected in the sinus tarsi.

Inclusion Criteria:

Study Group:

• Patients aged 14 years old and above that will remove the calcaneo stop screw, in place for at least 3 years after the implant, will be recruited
• Patients willing and able to give informed consent for the participation in the study. For underage patients, a parent/legal representative will give consent for the participation in the study.
• Male and female patients in fertile age can be recruited.

Control Group:

• Syndromic patients
• Previous foot malformation (synostosis, congenital clubfoot)
• Female participant who is pregnant, lactating or planning pregnancy during the course of the study.

Exclusion Criteria:

Control Group:

• Syndromic patients
• Previous foot malformation (synostosis, congenital clubfoot)
• Female participant who is pregnant, lactating or planning pregnancy during the course of the study.

Study Group:

• Patients suffering from post-operative complications
• Syndromic patients
• Previous foot malformation (synostosis, congenital clubfoot)
• Female participant who is pregnant, lactating or planning pregnancy during the course of the study.