Trepan. Internal Diameter 3.3mm - Helmut Zepf (08.910.04)

What is the Helmut Zepf 3.3 mm trepan?

The trepan with an internal diameter of 3.3 mm, referenced under code 08.910.04 by Helmut Zepf, is a precision rotary instrument intended for oral and implant surgery. This device is specifically designed to perform cylindrical bone sampling at the jaw level or to facilitate the removal of already integrated implants. Its structure allows for a clean cut of autogenous bone, which can then be used directly as a graft or processed via a bone mill for filling procedures. As an instrument of the Helmut Zepf brand, it meets the quality requirements necessary for invasive surgical interventions, offering a reliable solution for bone capital management and implant re-intervention.

What are the clinical indications for this trepan drill 3 3mm?

The Helmut Zepf 3 3mm trepan is indicated in two main clinical situations in oral surgery. Firstly, it is used to obtain cylindrical bone blocks from the donor site (jaw). These bone cores are intended to be repositioned at a recipient site or processed further. Secondly, this instrument is indicated for the explantation of implants. The choice of trepan must imperatively be made according to the diameter of the implant to be removed or the dimension of the desired bone tissue block. Its use helps limit peripheral bone loss during device removal, while ensuring a precise and controlled cut in areas of high mineral density.

What are the technical characteristics and operating parameters?

The Helmut Zepf trepan (ref. 08.910.04) features an internal diameter of 3.3 mm. For optimal use when obtaining bone blocks, the manufacturer recommends attaching the instrument to a contra-angle and setting the motor to a speed between 800 rpm and a maximum of 1000 rpm. The drilling or milling process must be carried out using continuous insertion and withdrawal movements to promote debris evacuation and avoid overheating. Abundant irrigation with a sterile physiological saline solution is essential, whether manually or via the contra-angle irrigation system. It is crucial not to stop the motor as long as the trepan is inside the surgical cavity to avoid any blockage or breakage of the instrument.

What are the precautions and contraindications for use?

The use of this trepan requires particular vigilance regarding the pressure exerted. The manufacturer Helmut Medizintechnik GmbH specifies that excessive pressure must not be applied during treatment to avoid damaging the tissues or the instrument. It is imperative to maintain constant irrigation with a sterile saline solution to prevent any thermal necrosis of the bone. A major precaution consists of never stopping the motor rotation while the trepan is engaged in the bone cavity, as this could prevent its removal or cause it to break. Although no specific medical contraindications are listed in the technical documentation, use is reserved for surgical procedures where the 3.3 mm diameter is clinically adapted to the patient's anatomy or the dimensions of the implant to be explanted.

How to handle the trepan during an implant explantation?

During an explantation procedure, the practitioner must first select the Helmut Zepf trepan whose diameter corresponds to that of the implant to be removed. After attaching the instrument to the contra-angle, the motor must be set to a speed range from 800 to 1000 rpm maximum. Motor activation precedes contact with the tissues. Milling is performed using back-and-forth movements (insertion and withdrawal) under abundant physiological saline irrigation. This technique allows for clearing the bone-implant interface while minimizing thermal trauma. Particular attention must be paid to the stability of the drilling axis to ensure a clean removal of the device without compromising the integrity of the surrounding bone.

Who is the manufacturer and what standards are respected?

This medical device is manufactured by Helmut Zepf Medizintechnik GmbH, located in Seitingen-Oberflacht, Germany. The trepan is classified as a Class IIa device according to current regulations. As a Class IIa product, it meets strict safety and performance standards to guarantee its use in a surgical environment. Traceability and compliance are ensured by the manufacturer, recognized for its expertise in dental and surgical instrumentation. Cleaning, sterilization, and maintenance protocols must be rigorously followed in accordance with Helmut Zepf instructions to maintain cutting efficiency and patient safety during each intervention.

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