Diamond Bur #855-025 Super Coarse Round End Taper FG, Pk3

Designed for high-speed crown and reduction work, the Diamond Bur #855-025 Super Coarse Round End Taper FG, Pk3 gives clinicians a wider cutting diameter that suits axial reduction and early contouring.

The round end taper shape supports controlled entry into enamel or restorative material, and the 025 head size offers a broader contact point for more assertive shaping.

Key Features

• Super coarse grit for rapid enamel and material reduction
• Round end taper design suited to crown preparation
• 025 head size offering a wider cutting surface
• High-quality FG diamond construction for high-speed handpieces
• 3 pieces per pack (price listed per pack)

Understanding the Diamond Bur #855-025 Super Coarse Round End Taper FG

When a crown prep needs strong axial reduction and a broad cutting width, the Diamond Bur #855-025 Super Coarse Round End Taper FG, Pk3 is a common choice. This diamond-coated instrument is made for high-speed handpieces, giving you a tapered profile with a rounded tip that engages enamel and restorative material decisively.

To put its use in context, it helps to know what each part of the name indicates.

Here is what the designation refers to:

• #855-025: This identifies a 855-025 diamond bur with a 2.5 mm diameter at its widest point. The larger cutting head supports broader axial reduction and early contouring.
• Super Coarse Grit: A super coarse round end taper bur uses larger diamond particles that accelerate initial removal of enamel or restorative surfaces.
• Round End Taper Shape: The tapered sides guide the reduction path, and the rounded tip helps you control depth during the first pass into the surface.
• FG (Friction Grip): This indicates compatibility with standard high-speed turbines commonly used in restorative workflows.

Compared with 850 or 856 variations, the 855 profile offers a slightly larger and more assertive cutting surface. The 850 tends to create narrower contact, while the 856 provides a long tapered profile. The 855 is chosen for early reduction that benefits from a broader taper and rounded tip for shaping axial walls.

Meanwhile, a #025 diameter is typically chosen when you need a wider footprint during the first stage of a crown preparation or when bulk reduction needs to progress quickly. This size helps establish form before refining margins with smaller-diameter dental burs that offer more precision.

Clinical Applications & Benefits of the 855-025 Super Coarse Bur

For crown preparations that need firm initial reduction and a wider cutting path, the Diamond Bur #855-025 Super Coarse Round End Taper FG, Pk3 delivers the diameter and taper needed to remove material efficiently while shaping the prep. The broader head and tapered profile give you quick reduction and help define the form of the preparation as you progress.

• Axial wall reduction during crown preparation: As part of the category of super coarse diamond burs, the wider cutting surface helps establish axial walls efficiently. The tapered sides guide the reduction path during the first passes.
• Bulk enamel and restorative material removal: The broad head engages dense surfaces with a wide contact point. This makes the bur useful for quickly clearing enamel or removing older restorative material.
• Occlusal and interproximal shaping: Round end taper burs support controlled entry into occlusal surfaces and help outline early shaping. The rounded tip minimises abrupt transitions as you move through these zones.
• Development of shoulder and margin form: The head geometry allows clinicians to outline early margin form during crown groundwork. The taper offers a predictable cutting angle when establishing the outline before refinement.
• Larger diameter for greater coverage: The #025 diameter covers more surface area with each pass. This is particularly useful when you need to progress through reduction rapidly before switching to smaller profiles.
• High-speed efficiency with FG compatibility: As part of the range of FG dental burs in Australia, the friction grip shank seats securely in turbine handpieces. This supports confident high-speed cutting through dense enamel and restorative material.

How to Choose & Use Super Coarse Round End Taper Diamond Burs

The Diamond Bur #855-025 Super Coarse Round End Taper FG, Pk3 provides the width and cutting strength needed for the initial phase of a crown prep. Pairing the correct grit with the round end taper profile supports steady reduction through enamel and restorative material.

1. Choosing the right grit

• Super coarse grit is used for rapid early cutting and sets the foundation for the rest of the prep.
• Selecting 855 diamond burs with a super coarse surface helps clear bulk material at the start of a crown prep or reduction.
• Medium grit becomes more useful once the axial form starts to develop, and fine grit helps finish margins and refine detail.
• Working through this sequence creates a controlled, predictable progression.

2. Using the round end taper profile

• The tapered body and rounded tip help consistently shape internal line angles.
• A super coarse dental bur guide highlights how the rounded tip can engage occlusal or interproximal surfaces while reducing abrupt transitions.
• This profile works well for clinicians who prefer a guided taper during the early shaping phase.

3. Technique, speed and cooling

• Keeping turbine speed consistent helps the bur maintain cutting performance through dense enamel.
• Water spray manages heat effectively during extended contact.
• Controlled pressure limits thermal buildup and supports accurate reduction

4. Sterilisation and storage

• Good handling protects the diamond layer and supports reliable performance across multiple cycles.
• Store burs in a clean, dry bur block after rinsing and drying.
• Only autoclave the bur once it’s fully dry.
• A quick check after each cycle confirms the head and diamond surface remain intact.

5. Knowing when to replace a bur

• Wear usually becomes noticeable as soon as the bur engages enamel.
• When diamond burs for high-speed handpiece use begin to slow on first contact with enamel, the abrasive layer is wearing down.
• Extra vibration suggests the surface is starting to break down.
• If you need more force to maintain reduction, the bur has reached the end of its useful life.

Frequently Asked Questions - Diamond Bur #855-025 Super Coarse Round End Taper FG, Pk3