Screwdriver Tree for CMFSystem Contra-Angle - Helmut ZEPF (47.523.12) - Delynov

What is the CMFSystem contra-angle screwdriver Umbrella shaft?

The CMFSystem contra-angle screwdriver Umbrella shaft, referenced under code 47.523.12, is a rotary instrument designed by Helmut Zepf for maxillofacial surgery. This device integrates into the CMFSystem to allow the transport and motorized screwing of osteosynthesis screws. Manufactured from medical stainless steel, this accessory serves as an implantology screwdriver mandrel for practitioners performing complex bone augmentations. It ensures the junction between the surgical contra-angle and the screw, thus facilitating access and precision during the fixation of guided bone regeneration (GBR) devices on the alveolar ridge.

What are the clinical indications for this Helmut Zepf instrument?

The use of this screwdriver shaft is indicated in the context of the osteosynthetic treatment of alveolar ridge defects in maxillofacial surgery. It is specifically used to screw titanium or steel screws into the cortical bone. These screws serve to stabilize various elements such as protective membranes, titanium meshes, or bone blocks (whether of autologous or allogeneic origin, or a mixture of both). The clinical objective is to isolate the bone regeneration site during the gingival soft tissue healing phase or to maintain the augmented bone substitute material in place.

What are the technical characteristics of the 47.523.12 shaft?

This technical instrument is a contra-angle mandrel specifically calibrated for the CMFSystem from Helmut Zepf Medizintechnik GmbH. It belongs to Class IIb of medical devices. Its medical stainless steel design allows for use in demanding surgical environments. The device is designed to transmit rotation torque from the contra-angle to the osteosynthesis screw. It requires pre-drilling of the cortical bone with compatible drills before screw insertion. This surgery contra-angle screwdriver is delivered non-sterile and must strictly follow a cleaning, disinfection, and sterilization protocol before each use.

What are the contraindications for the use of this device?

The main contraindication related to the use of this instrument is the patient's known hypersensitivity or intolerance to metals, as the instrument is composed of medical stainless steel. If a hypersensitivity reaction is triggered upon contact with the instrument, the procedure must be immediately interrupted and necessary medical measures must be taken. Furthermore, the use of this screwdriver shaft is contraindicated if the instrument shows visible damage or wear, such as cracks, breaks, or defects on the active parts, as this could compromise the safety of the surgical act.

What are the maintenance and safety precautions?

Like any instrument of the Helmut Zepf brand, this implantology screwdriver mandrel must be cleaned, disinfected, and sterilized before the first use and after each subsequent use. The manufacturer emphasizes the importance of checking the product's condition before any intervention: any sign of wear, crack, or deformation must lead to the immediate disposal of the instrument. Since it is used to fix bone augmentation devices, compatibility with other products in the system (screws, drills) must be verified beforehand. After the bone healing phase, the osteosynthesis products fixed using this shaft are generally explanted.

Who is the manufacturer and what standards are respected?

The CMFSystem Umbrella shaft is manufactured by Helmut Zepf Medizintechnik GmbH, a recognized manufacturer located in Seitingen-Oberflacht, Germany. This medical device is classified as Class IIb according to current regulations. The manufacturer imposes strict reprocessing protocols to guarantee patient safety in maxillofacial surgery. Compliance with the instructions for use and safety provided by Helmut Zepf is essential to ensure the proper functioning of the instrument during membrane or bone block fixation procedures, thus ensuring compliance with the expected performance requirements for Class IIb devices.

State of the art

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