Microsurgical emergency titanium screw, cross-recess, diameter 1.4 mm, length 5 mm - Helmut Zepf (47.574.35) - Delynov

What is the Helmut Zepf 47.574.35 emergency screw?

The Helmut Zepf microsurgical emergency screw, referenced under code 47.574.35, is a bone fixation device used in oral surgery. Manufactured from titanium, it features a cross-drive structure facilitating its handling and insertion. With a diameter of 1.4 mm and a length of 5 mm, this component is specifically sized for microsurgery interventions where available space is restricted. Titanium is selected for its biocompatibility properties, essential during tissue integration phases. This device is distributed by Delynov to meet the needs of practitioners requiring precision instrumentation for the stabilization of grafts or protective barriers during bone healing phases.

What are the clinical indications for this titanium 1 4mm screw?

This surgical emergency screw is primarily indicated in guided bone regeneration (GBR) and periodontal reconstruction protocols. It allows for the rigid fixation of non-resorbable membranes or titanium meshes, as well as the stabilization of small autogenous or allogeneic bone blocks. Its use is crucial to prevent any micromovement of the graft material, a determining factor for the success of osseointegration. In implant surgery, it serves to secure the bone volume necessary before implant placement. Its small size of 5 mm makes it particularly suitable for anatomical areas with low cortical thickness or proximity to sensitive structures, thus offering an effective backup solution in case of an unforeseen need for additional stabilization.

What are the technical characteristics of this microsurgical device?

The Helmut Zepf screw is distinguished by rigorous technical specifications adapted to modern implantology. It has a body diameter of 1.4 mm, which allows for minimal intrusion while guaranteeing sufficient mechanical strength for the retention of GBR devices. Its total length is 5 mm. The screw head features a cross-drive (cruciform) recess, designed to ensure optimal torque transmission and reduce the risk of the insert slipping during manual screwing. The design by Helmut Zepf Medizintechnik GmbH guarantees a surface finish compatible with surgical requirements. The threading is optimized for a quick grip in the cortical bone, ensuring immediate primary stability upon insertion into the prepared site.

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

Contraindications for the use of the Helmut Zepf emergency screw primarily include known hypersensitivities to titanium or its alloys. Clinically, use is discouraged in areas with active infection, insufficient vascularization, or bone density too low to ensure the primary stability of the device. Patients with uncontrolled systemic disorders affecting bone healing, such as certain calcium metabolisms or high-dose bisphosphonate treatments, may present increased risks of complications. 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 before any implantation of fixation material.

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

Being composed of titanium, this screw is a non-resorbable device. This means it remains structurally intact in the body until a possible removal procedure. In bone regeneration surgery, it must be perfectly buried under the soft tissues to avoid any premature exposure, which could lead to bacterial contamination of the graft site. The practitioner must ensure hermetic closure of the flaps. Depending on the treatment plan, the screw can be removed during the implant placement phase or during a subsequent surgical step once bone consolidation is achieved. Careful handling with appropriate Helmut Zepf instruments is recommended to avoid damaging the cross-drive recess during insertion or removal.

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 surgical and dental instrumentation. As a product intended for invasive surgery, it must be used exclusively by qualified healthcare professionals, such as dental surgeons, stomatologists, or implantologists. Although specific information on the regulatory class or CE marking is not detailed in the current technical sheet, this type of equipment is subject to strict sterilization and usage protocols defined by the manufacturer. It is imperative to consult the instructions for use attached to the product to check cleaning methods, sterilization, and specific safety recommendations before any clinical implementation.

State of the art

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