Extension Pin Block vs Pin Orthosis-extension Block Pinning for Bonny Mallet Fractures

Ankara University

Status: Enrolling

Conditions: Mallet Finger

Treatments: Procedure: cextension pin block; Procedure: pin orthosis- extension block pin

Study type: Interventional

Funder types: Other

Identifiers

NCT05857683

AnkaraUniHand

Details and patient eligibility

About

This is a single center prospective study comparing the extension pin block vs pin orthosis-extension block pinning for bonny mallet fractures.

Full description

Mallet finger is a fracture of the distal phalanx involving the dorsal articular surface. It is important because it concerns the extensor tendon attachment site. The clinical manifestation of mallet finger formation is active extension loss at the DIP joint. If the injury is not treated and becomes chronic, the DIP passive extension is gradually lost and a hyperextension posture occurs in the PIP joint due to the compensatory swan neck deformity. Non-surgical methods have an important place in the treatment of mallet finger injuries. The indications for surgical treatment of mallet finger injuries are a matter of debate. Conditions that are widely accepted as definite surgical indications are open injury, individuals who cannot work with a splint, the ruptured dorsal part is large and includes more than 30% of the articular surface, and the presence of palmar subluxation in the DIP. Among the mallet finger surgical treatments, the extension pin block technique , bracing in extension, hook method are defined.

In this prospective study, we aimed to compare the extension pin block technique with the pin orthosis-extension block pinning. In comparison, the patients eligible for the study will be evaluated according to Crawford criteria for function evaluation, complications (infection, nail deformities, skin necrosis, DIP joint osteoarthritis), recovery time.

Enrollment: 54 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• 18 years and older patients
• Wehbe classification type 2 b (Type Definition) I No DIP joint subluxation II DIP joint subluxation III Epiphyseal and physeal injuries Subtype A Avulsed fragment <1/3 of articular surface B Avulsed fragment 1/3-2/3 of articular surface C Avulsed fragment >2/3 of articular surface )
• Isolated bonny mallet fractures
• Minimum 1 year follow up
• Good cognitive status

Exclusion criteria

• Patients under the age of 18
• Open fracture
• Chronic mallet finger
• TFracture area that includes more than 50% of the joint face
• Patients whose follow-up less than 1 year

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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54 participants in 2 patient groups

extension pin block

Active Comparator group

Description:

this is the technique for mallet finger where 2 pins are used, one for the extension block and other intramedullary for the extension posture

Treatment:

Procedure: cextension pin block

pin orthosis- extension block pin

Active Comparator group

Description:

this is the technique for mallet finger where only 1 pin is used for extension block and an orthosis is applied for the extension posture

Treatment:

Procedure: pin orthosis- extension block pin