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Extension Block Pinning vs Conservative Treatment for Mallet Finger Fractures

Pin Orthosis Extension Block Pinning Versus Conservative Treatment for Doyle Type 4B Mallet Fractures

Status
Completed
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07560137
Acronym
PO-EBPT
Enrollment
62
Registered
2026-04-30
Start date
2022-01-13
Completion date
2024-10-15
Last updated
2026-04-30

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Mallet Finger Fracture

Keywords

Conservative treatment, crawford criteria, extension-block pinning technique, mallet fracture, pin orthosis

Brief summary

Mallet finger fractures are injuries affecting the tip of the finger and can be treated either with splinting or surgery. However, there is no clear agreement on which treatment provides better outcomes for certain types of these fractures. In this study, patients with mallet finger fractures were randomly assigned to receive either surgical treatment using a pin-orthosis extension-block pinning technique or conservative treatment with splint immobilization. Patients were followed at regular intervals, and outcomes such as finger movement, function, bone healing, and complications were evaluated over time. The purpose of this study is to compare these two treatment approaches and determine which one leads to better clinical and functional outcomes.

Detailed description

Mallet finger fractures, particularly those involving a significant portion of the distal interphalangeal joint articular surface, present a therapeutic challenge, and there is no consensus regarding the optimal treatment strategy. Both conservative management with splinting and various surgical techniques have been described in the literature. This randomized controlled trial was designed to compare the clinical and radiographic outcomes of the pin-orthosis extension-block pinning technique and conventional conservative treatment in patients with mallet finger fractures. Patients were randomly assigned to either surgical or conservative treatment groups and followed at regular intervals. Clinical and functional outcomes were assessed throughout the follow-up period to evaluate the effectiveness and safety of both treatment approaches."

Interventions

PROCEDUREPin-Orthosis Extension-Block Pinning Technique

The pin-orthosis extension-block pinning technique was performed under appropriate anesthesia. A Kirschner wire was used to block extension at the distal interphalangeal joint and stabilize the fracture fragment, followed by immobilization with an orthosis. The fixation was maintained for a defined period, and patients were followed according to the study protocol.

PROCEDURESplinting

Conservative treatment consisted of continuous splint immobilization of the distal interphalangeal joint in extension. Patients were instructed to maintain uninterrupted splint use for the recommended duration with regular follow-up visits to monitor compliance and clinical progress.

Sponsors

Haseki Training and Research Hospital
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Intervention model description

Participants were randomly assigned to one of two parallel groups: surgical treatment using the pin-orthosis extension-block pinning technique or conservative treatment with splinting. Each participant remained in the assigned group throughout the study

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No

Inclusion criteria

* Age between 18 and 65 years * Acute mallet fracture (≤ 3 weeks from injury) * Fracture fragment involving 20-50% of the distal interphalangeal (DIP) joint articular surface

Exclusion criteria

* Open fractures * Chronic mallet fractures (\> 3 weeks from injury) * Fracture fragment involving more than 50% of the DIP joint articular surface * Open physes * Inability to complete 12-month follow-up

Design outcomes

Primary

MeasureTime frameDescription
Distal Interphalangeal Joint Extension Lag12 monthsDegree of extension lag at the distal interphalangeal joint measured using a goniometer.

Secondary

MeasureTime frameDescription
Distal Interphalangeal Joint Range of MotionUp to 12 months (assessed at 2 weeks, 4 weeks, 6 weeks, 3 months, 6 months, and 12 months)Range of motion of the distal interphalangeal joint measured in degrees.
Functional Outcome According to Crawford Criteria12 monthsFunctional outcome assessed using the Crawford classification system.
Fracture UnionUp to 12 months (assessed at 6 weeks, 3 months, 6 months, and 12 months)Radiographic evidence of fracture healing assessed during follow-up.
Complication RateUp to 12 monthsIncidence of treatment-related complications observed during the study period.

Countries

Turkey (Türkiye)

Contacts

PRINCIPAL_INVESTIGATORKemal A Col, Doctor

Haseki Training and Research Hospital

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 1, 2026