Titanium cross-slot screw for micro-invasive surgery, Ø 1.2 mm, length 13 mm - Helmut Zepf (47.574.13) - Delynov

What is the Helmut Zepf 47.574.13 cross-drive screw?

The Helmut Zepf cross-drive screw (reference 47.574.13) is a miniature osteosynthesis device specifically developed for micro-invasive surgery. Manufactured in titanium, a material recognized for its mechanical properties and biocompatibility in the oral environment, this screw features a diameter of 1.2mm and a total length of 13mm. Its structure is defined by a precision threaded body and a cross-drive head, allowing for efficient torque transmission during manual or motorized insertion. This device is a central element of fixation systems for bone regeneration, offering a robust solution for maintaining graft structures in position during the initial healing phase.

What are the clinical indications for this 1.2mm titanium screw?

The use of this 1.2mm titanium screw is primarily indicated in oral and implant surgery protocols requiring rigid fixation. It is used for the stabilization of autologous or allogenic bone grafts during alveolar ridge reconstructions. In implantology, it allows for the immobilization of regeneration membranes or thin osteosynthesis plates. Its 13mm length is particularly suited to clinical situations where a significant anchoring depth is necessary to ensure the primary stability of the bone block, notably in areas of low density or during shell techniques.

What are the technical characteristics of this device?

The technical specifications of this Helmut Zepf model include a thread diameter of 1.2mm, which classifies it among micro-fixation devices. The 13mm length allows for deep penetration for bicortical anchoring if the clinical situation requires it. The cross-drive of the screw head is designed to minimize the risk of instrument slippage (cam-out) and ensure optimal retention on the screwdriver. The titanium used guarantees high resistance to corrosion and excellent tissue integration. Reference 47.574.13 corresponds to a high-precision manufacturing standard specific to the Helmut Zepf Medizintechnik GmbH micro-surgery catalog.

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

Contraindications for the use of the Helmut Zepf screw primarily include known allergies or hypersensitivities to titanium or its alloys. Clinically, use is discouraged in areas presenting active infection, insufficient vascularization, or residual bone volume that does not allow for stable anchoring of the 1.2mm thread. Patients with severe systemic disorders affecting bone healing, such as uncontrolled metabolic pathologies or certain high-dose bisphosphonate treatments, may present relative contraindications. It is the practitioner's responsibility to evaluate the benefit-risk ratio according to the patient's general health status.

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

Being manufactured in titanium, this screw is a non-resorbable device. It remains stable in the body and does not undergo degradation by hydrolysis or enzymatic action. Depending on the chosen clinical protocol, the screw can be left in place permanently or removed during a second surgical intervention, generally at the time of implant placement or after complete consolidation of the graft. If removal is planned, the practitioner must ensure that access to the cross-drive head is preserved and that excessive osseointegration does not block unscrewing. Careful handling during placement is required to avoid any deformation of the drive which would complicate future explantation.

Who is the manufacturer and what standards are met?

This medical device is manufactured by Helmut Zepf Medizintechnik GmbH, a manufacturer recognized for its expertise in surgical instrumentation and fixation systems. Production follows rigorous control processes specific to micro-surgery devices. Although specific details of the CE marking or regulatory class are not detailed here, the product is designed to meet the technical requirements of modern oral surgery. Practitioners are invited to systematically refer to the original labeling and the instructions for use provided by Helmut Zepf to verify sterilization instructions, storage conditions, and current compliance certifications.

State of the art

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