Titanium cross-slot screw, Ø 1.2 mm, length 12 mm, for microsurgery, grey anodized - Helmut Zepf (47.574.12) - Delynov

What is the Helmut Zepf 47.574.12 grey titanium screw?

The Helmut Zepf grey titanium screw (reference 47.574.12) is a miniature osteosynthesis device specifically developed for oral micro-surgery applications. Manufactured by Helmut Zepf Medizintechnik GmbH, it is designed from high-quality titanium. Its structure is characterized by a cross-head socket, facilitating a secure grip by the appropriate screwdriver. The grey anodization of its surface is not merely aesthetic; it allows for rapid visual identification within the surgical instrumentation. This device is primarily used to maintain barriers or bone grafts in a stable position during the initial healing phase, meeting the precision requirements of modern bone reconstruction protocols.

What are the clinical indications for this micro-surgery screw?

In oral and implant surgery, this screw is indicated for guided bone regeneration (GBR) procedures. It is used for the fixation of non-resorbable or resorbable membranes, as well as for the maintenance of autogenous or allogenic bone blocks. Its small size (diameter of 1.2 mm) makes it particularly suitable for areas where bone volume is limited or when interdental space requires micro-surgery instrumentation. It prevents the displacement of the graft material under soft tissue pressure, thus ensuring the maintenance of the space necessary for osteogenesis. Its use is common in horizontal and vertical ridge augmentations prior to implant placement.

What are the technical characteristics of the Helmut Zepf 47.574.12 screw?

This model features precise technical specifications to meet the constraints of micro-surgery. The screw has a diameter of 1.2 mm, allowing for minimal intrusion while maintaining sufficient mechanical strength for stabilization. Its total length is 12 mm, offering an anchoring depth adapted to the different bone densities encountered in maxillofacial surgery. The head socket is of the cross-head type, ensuring efficient torque transmission and reducing the risk of slipping during manual insertion. The material used is grey anodized titanium, chosen for its recognized biocompatibility properties and its lightness, which are essential for temporary tissue integration.

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

Contraindications for the use of the Helmut Zepf 47.574.12 screw mainly include known hypersensitivity or allergies to titanium or its alloys. Clinically, use is discouraged in sites presenting an active infection, insufficient vascularization, or poor bone quality that does not allow for primary stability of the device. Furthermore, it should not be used in situations where mechanical stresses exceed the strength capacities of a 1.2 mm diameter. It is the practitioner's responsibility to evaluate the patient's general health status, particularly bone metabolism disorders or systemic pathologies that could compromise healing, before any intervention.

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

As this screw is made of titanium, it is by definition non-resorbable. Unlike polymer devices, it does not degrade in the body through hydrolysis. It must therefore generally be removed during a second surgical intervention, often at the time of implant placement or after consolidation of the bone graft. The practitioner must ensure that the screw head does not create irritation of the overlying soft tissues or premature exposure of the membrane. Total coverage by the mucosal flap is imperative. During removal, the use of specific Helmut Zepf instrumentation is recommended to fit perfectly into the cross-head socket and avoid any damage to the surrounding newly formed bone.

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 precision surgical instrumentation. Although specific regulatory specifications such as class or CE marking are not detailed here, the product must be used in accordance with current clinical protocols in oral surgery. It is imperative to consult the instructions for use provided by the manufacturer for cleaning procedures, sterilization (if the product is delivered non-sterile), and recommended tightening torques. The use of screwdrivers and gripping instruments from the Helmut Zepf brand is strongly advised to guarantee the integrity of the screw's cross-head during the operative act.

State of the art

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