The Efficacy and Safety of Magnesium Alloy Screw as a Novel Bioabsorbable Material in Patients Due to Hand Fractures

U&I Medical Technologies

Status and phase

Completed

Phase 2

Conditions

Hand Fractures

Treatments

Device: K-MET™ Bioresorbable Bone screw

Study type

Interventional

Funder types

Other

Identifiers

NCT02456415

UNI-01

Details and patient eligibility

About

This study evaluates the safety and efficacy of biodegradable magnesium alloy screw, in patients with hand fractures who require internal fixation (to obtain a product license from the Ministry of Food and Drug Safety in Korea (MFDS)).

Full description

Rationale: Hand fractures including intra- and extra-articular phalanges and metacarpal are common and account for approximately 40% of upper extremity fractures and lead to functional loss of the hand.Fractures can be treated conservatively with a nonsurgical approach(Closed reduction) by placing the damaged figure in a splint; this may results in displacement, rotation, angulation and/or instability, therefore require surgery. Surgical techniques for treatment of hand fractures include internal fixation with metal plate or screws after Open reduction and external fixation with insertion of percutaneous pins or screws. Percutaneous external fixation is one of the widely used methods, but is difficult to maintained when accompanied by unstable fractures and soft tissue injuries or there are severely comminuted fractures and sometimes results in restricted motion of adjacent joints due to prolonged fixation. In comparison, internal fixation is an operation using internal fixators such as plates, wires, screws etc. solely or concurrently depending on the location and severity of hand fracture. With the recent advancement of implant design and fixation techniques, a variety of screws are widely used for fixation of small-bone fractures.

The present study was designed to evaluate the efficacy and safety of magnesium alloy screw as a novel bioabsorbable and biodegradable material.

Study Duration: After an approval of clinical protocol from MFDS in Korea, total 20 months were required including 14 months for subject enrollment and 6 months of follow-up. An additional 1 month was required after completion of the study for handling of data, statistical analysis and preparation of study report.

Target Subjects: Patients who require internal fixation using screws due to hand fractures

Investigational Device: K-MET™ Bioresorbable Bone screw (manufactured by U&I) This device divided into two type,Cortex screw and Headless compression screw.

Number of Subjects: A total of 34 cases of bone fractures in 28 subjects.

Enrollment

28 patients

Sex

All

Ages

20+ years old

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

Male or female patients aged 20 years or older
Patients who require internal fixation using screws in the hand
The clinical features of hand fractures are oblique and spiral fractures
Patients who voluntarily submitted a written informed consent and are willing to and able to follow the clinical study protocol.

Exclusion criteria

Infections around the fracture site or soft-tissue injury greater than Grade III
Fracture patterns such as open, transverse or comminuted fracture with greater than type II
Fractures that require the use of wires, pins or plates for fixation
Patients with re-fracture
Patients with critical systemic diseases
Patients with renal failure showing plasma creatinine level exceed 1.4 at the screening
Pregnant, lactating women
Patients who have a history of allergy to magnesium alloy
Patients with presence of past illness or taking a drug that may affect bone union
Patients who have participated in other clinical study and treated with medication or other medical device within past 3 months
Patients who are judged not to be appropriate for study enrollment in the opinion of the investigator

Trial design

Primary purpose

Treatment

Allocation

N/A

Interventional model

Single Group Assignment

Masking

None (Open label)

28 participants in 1 patient group

K-MET™ Bioresorbable Bone screw

Experimental group

Description:

The K-MET™ Bioresorbable Bone Screw, intended to be used for trauma therapy, consists of Cortex screws, Cannulated headless screws. For Headless screw and Cannulated headless screws, the design is similar to normal headless compression screws but the compression function was achieved by using different lengths for the front and rear pitches. These screws are dynamic and allow therewith the fracture at the Carpal, metacarpal, and small hand bone.

Treatment:

Device: K-MET™ Bioresorbable Bone screw