Blue anodised titanium cross-fit screw for microvascular surgery, Ø 1.5 mm, length 13 mm - Helmut Zepf (47.575.13) - Delynov

What is the Helmut Zepf 47.575.13 cross-fit screw?

The Helmut Zepf cross-fit screw (reference 47.575.13) is a bone fixation device specifically developed for microvascular surgery and maxillofacial reconstruction procedures. Manufactured by Helmut Zepf Medizintechnik GmbH, this blue titanium screw is distinguished by its anodized titanium design, a material recognized for its mechanical properties and biocompatibility in surgical environments. Its structure includes a cross-fit socket head allowing for efficient torque transmission and secure insertion. With a diameter of 1.5mm and a length of 13mm, it offers a stabilization solution for practitioners performing bone grafts or barrier device fixations. The blue anodization is not merely aesthetic; it allows for rapid diameter identification within the surgical tray and facilitates visualization of the hardware during re-intervention phases.

What are the clinical indications for this 1.5mm titanium screw?

In oral and implant surgery, this 1.5mm titanium screw is primarily indicated for the rigid fixation of autologous bone grafts or bone substitute blocks. It is also used in guided bone regeneration (GBR) protocols to maintain non-resorbable membranes or titanium meshes, thus preventing any micromovement detrimental to bone healing. Its use extends to microvascular surgery where the precision of the 1.5mm diameter allows for intervention on thin bone structures. The 13mm length is particularly suitable for situations requiring deep anchorage or traversing a significant graft volume to reach the recipient basal bone. It thus contributes to clinical success by ensuring strict immobilization of hard tissues during the osteoconduction and osteofixation phase.

What are the technical characteristics of the anodized titanium screw?

The Helmut Zepf anodized titanium screw features rigorous technical specifications to meet the constraints of osteosynthesis. It features a body diameter of 1.5mm and a total length of 13mm. Its manufacturing is based on a high-quality titanium alloy, treated by blue anodization to improve surface resistance and visibility. The cross-fit socket of the head is machined to limit the risks of instrumentation slippage (stripping) during loading. The threading is designed to offer excellent primary grip, even in variable bone densities encountered in mandibular or maxillary surgery. This non-resorbable device must be handled with gripping instruments adapted to reference 47.575.13 to guarantee the integrity of the screw head and threading during trans-cortical insertion.

What are the contraindications for the use of this osteosynthesis screw?

The use of this osteosynthesis screw is contraindicated in patients with a known hypersensitivity or allergy to titanium or its alloys. Clinically, it must not be used in areas with active infection, insufficient vascularization, or an inadequate amount of residual bone to support the anchorage of the 1.5mm diameter screw. Uncontrolled systemic pathologies affecting bone metabolism or healing may also constitute relative or absolute contraindications. It is the surgeon's responsibility to evaluate the benefit-risk ratio based on the patient's general health status and the quality of the recipient site. The absence of primary stability during placement should lead to the use of a larger diameter or an alternative fixation technique.

What are the precautions related to the non-resorbable nature of titanium?

As this screw is manufactured from titanium, it is by definition non-resorbable. It is designed to remain in place for the entire duration necessary for bone consolidation or graft integration. Depending on the clinical protocol and the indication (membrane fixation versus block fixation), the practitioner may decide to leave the screw in situ or proceed with its removal during a second surgical stage, for example at the time of implant placement. If removal is planned, the blue anodization greatly facilitates the localization of the screw under soft tissues or within the neoformed bone callus. It is imperative to use the corresponding cross-fit screwdriver to avoid damaging the socket, which would make explantation complex. Rigorous oral hygiene is necessary to avoid any peri-implantitis or inflammation around the fixation hardware.

Who is the manufacturer and what are the recommendations for use?

The official manufacturer of this device is Helmut Zepf Medizintechnik GmbH, a company recognized for its expertise in high-precision instrumentation and osteosynthesis systems. As a product intended for specialized surgery, the use of the 47.575.13 screw must strictly comply with current surgical protocols. The manufacturer recommends the use of ancillary instrumentation compatible with the cross-fit socket to guarantee perfect axial insertion. Although specific regulatory class information is not detailed here, this type of hardware is subject to international standards relating to implantable medical devices. Professionals must systematically refer to the technical manual and the cleaning/sterilization instructions provided by Helmut Zepf before any clinical use to ensure patient safety and the durability of the treatment.

State of the art

Guided bone regeneration (GBR) in implantology relies on membrane fixation quality.