Bioabsorbable interference screws have become a key component in modern orthopedic surgery, particularly in procedures such as ACL reconstruction and tendon fixation. These implants provide reliable mechanical stability during the healing phase and gradually degrade as biological integration occurs.

Orthosyn Medikal’s I-BONE bioabsorbable screw portfolio offers advanced fixation combined with natural integration, supporting both surgical precision and long-term patient outcomes.

What is a Bioabsorbable Screw?

A bioabsorbable interference screw is designed to fix grafts within bone tunnels during ligament reconstruction procedures. Unlike metallic implants, these screws are gradually absorbed by the body over time.

According to the product documentation, these implants provide temporary mechanical fixation and undergo complete biological degradation without requiring secondary removal surgery 

Advantages of Bioabsorbable Screws

Compared to traditional metallic implants, bio screws offer several clinical advantages:

• No permanent foreign body remains in the patient

• No imaging artifacts in MRI or CT

• Eliminates the need for implant removal surgery

• Supports natural bone integration

The system is designed to ensure stable fixation while enabling biological healing.

Orthosyn Bio Screw Types

Orthosyn provides two main types of bioabsorbable interference screws:

1. I-BONE PLA Screw

Material:
Poly (L,D,L Lactide) (70:30)

Key Features:

• Transparent structure

• Reliable initial mechanical strength

• Fully bioabsorbable

• Predictable degradation profile

This screw provides secure temporary fixation and gradually degrades as healing progresses 

2. Powerbone PLDLLA + β-TCP Screw

Material:
PLDLLA combined with Tricalcium Phosphate (TCP)

Key Features:

• Opaque white structure

• Combined mechanical and biological performance

• Osteoconductive properties

• Enhanced bone integration

The TCP component actively promotes bone growth and cellular integration during degradation 

Key Differences Between PLA and PLDLLA + β-TCP Screws

PLA screws primarily provide mechanical fixation with controlled degradation, while PLDLLA + β-TCP screws combine fixation with biological stimulation of bone growth.

PLA screws are typically preferred in standard procedures, whereas PLDLLA + β-TCP screws are advantageous in cases requiring enhanced bone healing or revision surgeries.

Absorption and Healing Process

The absorption lifecycle consists of three phases:

1. Initial fixation phase with maximum mechanical stability

2. Gradual degradation phase during healing

3. Complete absorption and replacement by natural bone

This ensures that the implant supports the graft during critical healing stages and disappears once its function is complete 

Clinical Indications

Bioabsorbable interference screws are commonly used in:

• ACL reconstruction

• PCL reconstruction

• Tendon fixation

• Soft tissue fixation

These implants are designed to support both arthroscopic and open surgical procedures

Conclusion

Bioabsorbable interference screws represent a significant advancement in orthopedic implant technology. Orthosyn Medikal’s PLA and PLDLLA + β-TCP screw systems provide surgeons with reliable fixation options tailored to different clinical needs.

Selecting the appropriate screw type allows for improved stability, enhanced healing, and reduced long-term complications.