DIANA

DIANA is a simple and safe technique for fusion of the sacroiliac joint based on distraction interference arthrodesis, while accounting for neurovascular and osseous structures. Targeted, reproducible placement of the DIANA implant is achieved with sequential instrumentation, performing ligamentotaxis to stabilize the joint during the fusion process.

• DIANA Surgical Technique.pdf

Benefits:

Extremely safe dorsal approach away from the nerves and large blood vessels; the stabilizing ligamentous apparatus remains intact; bony and muscular structures are not impaired; controlled bony fusion; correctable (malpositioning of the implant will still not harm the nerves or blood vessels); the position can be controlled radiologically on three different planes during surgery; the essential markers of the instruments are visible; improvement in back AND leg pain has been demonstrated.

Implant:

The DIANA implant is anchored at the hardest point of the pelvic bone. It ensures that the short distance between the painful joint surfaces restored by surgery is maintained during the healing phase, when the new bone graft material is transformed into solid bone and thus stabilizes the joint.
The tapered titanium implant has self-tapping, hollow threads at the front end, enabling it to be rapidly and securely screwed into the desired position.
The other, wider end has stronger threads and a broader supporting surface (shoulder), preventing the implant from sinking into the softer bone of the sacrum. Along with specially designed instruments, allowance is therefore made for the asymmetrical bone densities between the sacrum and ilium.

Procedure:

• The patented DIANA instruments guarantee anatomically correct positioning of the implant; distraction and fusion of the joint are achieved by ligamentotaxis while accounting for the neurovascular structures and special osseous properties of the SIJ.
• Permanent fusion is achieved intra- and extra-articularly by the implant and the generous packing of bone graft material (autologous or allogeneic) in and around the implant.
• The procedure is gentle on the muscles and tissue, and revision – where necessary – is both easy and minimally aggressive.
• The instrumentation is based on dilatation and allows for standardized procedures that deliver reproducible results.

Procedure: Special Features:

• The implant is positioned deep in the load-bearing column of the iliac bone. Procedures to date have not been capable of achieving such a position in the skeletal hypomochlion.
• Only the proximal portion of the implant protrudes into the extra-articular joint space and sustains the achieved distraction, which is no more than 1 – 1.5 mm.
• Subsidence of the implant into the softer bone of the sacrum is prevented by such positioning, as well as by the asymmetrical preparation and the “shoulders” integrated in the proximal thread.
• The joint is not “screwed” in place; the joint space is retained or is corrected by the minimal degree of distraction
• Retraction and correction are still entirely possible.
• The access route permits the ligamentous, muscular and neurovascular structures to be preserved.
• The instruments guarantee precise positioning and reproducible results.

About SIGNUS

SIGNUS Medizintechnik supports physicians and medical specialist personnel with innovative and safe solutions for the treatment of spinal disorders – for optimal patient mobility in everyday situations.Commitment builds confidence: Due to our many years of experience and extensive expertise we fully understand the needs of medical experts and patients and can turn new requirements into reliable products quickly and to the highest standards of quality. As an independent family-run company we have been pursuing this goal since 1994. http://www.signus.com