Sharpening stone number 302 mounted on handpiece - Hu-Friedy

What is the Hu-Friedy #302 sharpening stone?

The #302 sharpening stone marketed by Delynov is a maintenance device designed by the manufacturer Hu-Friedy Mfg. Co., LLC. Unlike traditional manual stones, this model is specifically mounted on a shank adapted for use on a handpiece. This configuration allows for dental rotary sharpening, offering an alternative method for restoring the sharpness of surgical and prophylaxis instruments. This device belongs to the category of consumables (CONSO) and is classified as a Class I medical device according to current regulations. Its use is strictly reserved for healthcare professionals trained in rotary instrumentation maintenance techniques.

What are the clinical indications for this device?

The use of the Hu-Friedy #302 sharpening stone is indicated for the regular maintenance of the sharp edges of instruments used in periodontology and oral surgery. It is particularly useful for scaler sharpening and the reconditioning of Gracey curettes or Sickle-type scalers. By maintaining an optimal cutting edge, the practitioner ensures the efficiency of their movements during root planing or the removal of calcified deposits. A well-sharpened instrument guarantees better tactile transmission and precise application of force, which is crucial during delicate interventions in implantology or soft tissue surgery.

What are the technical characteristics of the #302 stone?

The main technical characteristic of this Hu-Friedy product lies in its mounting on a handpiece axis. This design allows the rotary movement of the dental unit to be transformed into a controlled abrasive action on the metal of the instrument to be sharpened. Although detailed grit specifications are not provided, the #302 reference corresponds to a grit standard adapted to dentistry needs for handpiece sharpening. As a Class I device, it meets basic safety requirements for non-invasive maintenance accessories. Its manufacture by Hu-Friedy Mfg. Co., LLC guarantees compatibility with medical sector quality standards.

What are the contraindications for the use of this stone?

There are no specific medical contraindications listed for the use of this sharpening stone on instruments, as it does not come into direct contact with the patient. However, according to the manufacturer Hu-Friedy instructions, the use of this device is exclusively reserved for healthcare professionals. A major technical contraindication would be the use on instruments whose coating does not support abrasion (such as certain instruments with titanium nitride coating or specific non-sharpening instruments). It is imperative to refer to the instructions for use attached to the product to identify any restrictions related to the type of metal or the recommended rotation speed.

What are the precautions for use and maintenance?

The use of a handpiece-mounted stone for dental rotary sharpening requires mastery of the rotation speed to avoid any overheating of the instrument's metal, which could alter its temper. The practitioner must ensure to respect the sharpening angle specific to each instrument (generally between 70 and 80 degrees for curettes). After each sharpening operation, instruments must imperatively undergo a complete cleaning and sterilization cycle before being reused in the mouth, in order to eliminate metal filing residues and abrasive particles. The stone itself must be inspected regularly to check its structural integrity and its centering on the shank.

Who is the manufacturer and what standards are respected?

The #302 sharpening stone is manufactured by Hu-Friedy Mfg. Co., LLC, headquartered in Chicago, USA. Hu-Friedy is a recognized manufacturer in the global dental instrumentation field. This product is listed as a Class I medical device. In accordance with regulations, the manufacturer specifies that this device is reserved for professional use. Although specific CE marking is not mentioned in the source data, the product respects American and international manufacturing standards imposed on Class I devices. Practitioners are invited to read the instructions carefully before any use to guarantee compliance with safety protocols.

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