INNER DIAMETER 2.8 MM TREPAN. Helmut Zepf (08.910.03)

What is the Helmut Zepf 2.8 mm trephine?

The Helmut Zepf trephine, referenced under code 08.910.03, is a precision rotary instrument designed for oral bone surgery. This device features an internal diameter of 2.8 mm, specifically calibrated for the creation of cylindrical bone blocks. Manufactured by Helmut Zepf Medizintechnik GmbH, this tool is a Class IIa medical device essential for autogenous sampling or explantation procedures. Its structure allows for a clean cut of the bone tissue while facilitating the recovery of the bone core for subsequent use, whether for a direct graft or after processing in a bone mill.

What are the clinical indications for this device?

The clinical indications for this trephine 2 8mm primarily include the sampling of cylindrical bone grafts from the jaw. These blocks can be reused at other surgical sites or processed via a bone mill. Another major indication concerns implant explantation: the trephine drill 2 8mm allows for the release of an integrated implant by performing precise peripheral drilling. The choice of diameter must always be correlated to the size of the desired block or the diameter of the implant to be removed in order to minimize the loss of surrounding bone substance during the intervention.

What are the technical and handling characteristics?

This Helmut Zepf trephine must be attached to a surgical contra-angle. To obtain bone blocks, the manufacturer recommends a rotation speed between 800 rpm and an unspecified maximum (standard cruising speed). For explantation, the recommended range is between 800 rpm and 1000 rpm maximum. The drilling or milling process must be performed using continuous in-and-out movements. It is imperative not to stop the motor while the instrument is inserted in the surgical cavity to avoid any blockage or breakage of the instrument. The internal diameter of 2.8 mm defines the final dimension of the sample.

What are the contraindications for use?

Although the technical text does not list specific systemic medical contraindications, the use of this trephine is conditioned by the available bone volume and proximity to critical anatomical structures (nerves, sinuses). Excessive pressure during application is strictly discouraged by Helmut Zepf Medizintechnik GmbH to avoid thermal overheating or mechanical damage. Failure to respect the recommended rotation speeds or the absence of adequate irrigation constitute major technical contraindications that can lead to bone necrosis or breakage of the rotary device during the drilling phase.

What precautions should be taken during irrigation?

Rinsing is a critical step when using the trephine to guarantee the viability of the bone tissue and the longevity of the instrument. The drilling operation must imperatively take place under abundant quantities of sterile physiological saline solution. This irrigation can be performed manually by an assistant or via the integrated cooling system of the contra-angle. Constant cooling allows for the evacuation of bone debris and limits temperature rise. Maintaining the motor in rotation during withdrawal from the cavity is also an essential precaution to prevent the trephine from jamming.

Who is the manufacturer and what standards are met?

This device is manufactured by Helmut Zepf Medizintechnik GmbH, located in Seitingen-Oberflacht, Germany. This manufacturer is recognized for the high quality of its surgical instruments. The product is classified as a Class IIa medical device according to current regulations. It meets the safety and performance requirements necessary for invasive oral surgery interventions. Traceability and compliance with German manufacturing standards ensure practitioners a reliable tool for complex bone sampling and implant removal procedures.

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