D.807.012.SG.FG

Frank Dental D.807 Diamond Inverted Cone Bur – Dental Cavity Preparation Bur for Undercuts, Retention Form and Operative Dentistry

The Frank Dental D.807 Diamond Inverted Cone Bur is a premium German-engineered dental cavity preparation bur designed for operative dentistry, cavity refinement, undercut preparation and mechanical retention form creation.

Manufactured using high-quality natural diamond technology, the Frank Dental D.807 inverted cone dental bur provides dentists with precise cutting efficiency, exceptional tactile control and predictable cavity preparation performance during restorative procedures.

The D.807 diamond bur is widely used for:

• Class I cavity preparations
• Class II cavity preparations
• Amalgam cavity preparation
• Composite cavity refinement
• Undercut preparation
• Retention groove creation
• Operative dentistry procedures
• Conservative cavity preparation
• Caries removal refinement
• Minimally invasive restorative dentistry

For dentists searching for:

• Diamond inverted cone bur
• Inverted cone cavity preparation bur
• Dental bur for undercuts
• Amalgam preparation bur
• Operative dentistry bur
• Retention form bur
• Diamond bur for cavity preparation
• Dental bur for caries excavation
• Flat floor cavity preparation bur
• Dental bur for mechanical retention
• German diamond dental burs
• Frank Dental operative burs

the Frank Dental D.807 provides a highly precise and clinically reliable solution.

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What Is the Frank Dental D.807 Inverted Cone Bur?

The Frank Dental D.807 is a diamond-coated inverted cone cavity preparation bur featuring:

• A wider cutting diameter at the tip
• Narrower upper neck
• Flat-end cutting surface
• Angled side walls
• Precision natural diamond coating

This unique inverted cone shape allows dentists to create conservative undercuts and retentive cavity forms while maintaining maximum control during tooth preparation.

Unlike round burs or straight fissure burs, the D.807 inverted cone bur is specifically designed to produce:

• Mechanical retention
• Internal undercuts
• Flat pulpal floors
• Defined cavity geometry
• Smooth internal cavity walls
• Conservative cavity preparations

This makes the bur an essential instrument in restorative dentistry and operative cavity preparation.

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Why Dentists Use an Inverted Cone Bur for Cavity Preparation

One of the key principles in operative dentistry is creating adequate retention and resistance form within the cavity preparation.

The Frank Dental D.807 inverted cone bur helps clinicians achieve this by allowing controlled preparation of internal undercuts beneath the cavity walls.

The wider tip of the bur cuts laterally beneath dentine while preserving the cavosurface margin.

This is especially important when performing:

• Amalgam cavity preparations
• Core build-up preparations
• Traditional operative dentistry
• Non-bonded restorations
• Deep cavity preparations

Proper retention form helps reduce the risk of:

• Restoration dislodgement
• Marginal leakage
• Fracture failure
• Occlusal instability
• Restoration movement during function

The D.807 allows dentists to create conservative but highly effective retentive features without unnecessarily removing healthy tooth structure.

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Educational Information – How the D.807 Helps Create Undercuts

An undercut is a slight internal widening beneath the cavity wall that helps mechanically retain the restoration.

This remains extremely important in amalgam dentistry where the material relies heavily on mechanical retention rather than adhesive bonding.

The Frank Dental D.807 inverted cone bur is designed specifically for this purpose.

How the Bur Creates an Undercut

The dentist carefully guides the bur laterally within the dentine while maintaining controlled depth and angulation.

Because the cutting tip is wider than the upper neck, the bur can create slight internal enlargement beneath the cavity wall.

This creates:

• Mechanical retention
• Improved resistance form
• Greater restoration stability
• Enhanced restoration longevity
• Improved occlusal durability

The flat-ended design also allows the dentist to simultaneously create a flat pulpal floor while refining the cavity geometry.

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Why Conservative Undercuts Are Important

Modern minimally invasive dentistry focuses on preserving healthy tooth structure wherever possible.

Overcutting dentine while attempting to create retention can weaken the tooth and increase the risk of cusp fracture.

The Frank Dental D.807 allows clinicians to create:

• Conservative undercuts
• Controlled retention form
• Minimal dentine removal
• Conservative cavity refinement
• Predictable cavity geometry

This helps improve:

• Tooth strength
• Long-term prognosis
• Structural preservation
• Restoration longevity
• Fracture resistance

The precision shape of the D.807 helps dentists avoid unnecessarily aggressive cavity designs while still achieving excellent restoration retention.

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How Dentists Use the Frank Dental D.807 Bur

Step 1 – Initial Cavity Access

The dentist initially gains access to the carious lesion using:

• Round burs
• Pear-shaped burs
• Straight fissure burs
• Tungsten carbide burs

Once access and primary caries removal have been completed, the D.807 inverted cone bur is introduced for cavity refinement.

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Step 2 – Flattening the Pulpal Floor

The flat-end design allows the dentist to create a smooth pulpal floor.

A flat pulpal floor helps:

• Improve restoration support
• Distribute occlusal forces evenly
• Increase restoration stability
• Reduce stress concentration
• Improve cavity form

This is especially important during Class I and Class II cavity preparations.

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Step 3 – Creating Retention Form

The bur is gently moved laterally beneath the cavity walls to create conservative retentive undercuts.

This creates mechanical retention that helps secure the restoration during function.

The precision diamond coating allows smooth cutting with excellent tactile feedback and reduced vibration.

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Step 4 – Refining Internal Walls

The Frank Dental D.807 is also highly effective for refining:

• Internal line angles
• Axial walls
• Gingival floors
• Proximal boxes
• Cavity walls
• Retention grooves

This creates a smooth and predictable cavity preparation that improves restorative adaptation.

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Advantages of the Frank Dental D.807 Diamond Bur

Precision German Engineering

Frank Dental is recognised worldwide for producing precision-engineered German dental burs with exceptional manufacturing quality.

The D.807 provides:

• High concentricity
• Smooth cutting performance
• Reduced vibration
• Excellent balance
• Superior cutting precision

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Efficient Diamond Cutting Performance

The premium natural diamond coating delivers efficient cutting of:

• Enamel
• Dentine
• Composite restorations
• Existing restorative material

This improves cutting efficiency while reducing handpiece pressure and clinician fatigue.

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Improved Tactile Control

The inverted cone design gives clinicians excellent tactile sensitivity during cavity preparation.

This allows dentists to:

• Feel dentine resistance
• Maintain preparation accuracy
• Avoid overcutting
• Create conservative undercuts
• Preserve healthy tooth structure

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Ideal for Minimally Invasive Dentistry

The D.807 supports modern conservative dentistry principles by helping clinicians perform:

• Conservative cavity preparation
• Minimal dentine removal
• Controlled retention form
• Precise cavity refinement
• Predictable restorative procedures

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Clinical Applications of the D.807 Inverted Cone Bur

The Frank Dental D.807 Diamond Inverted Cone Bur is commonly used for:

Operative Dentistry

• Cavity refinement
• Retention form creation
• Undercut preparation
• Internal cavity shaping

Restorative Dentistry

• Amalgam cavity preparation
• Composite cavity preparation
• Core build-up retention
• Restoration replacement

Minimally Invasive Dentistry

• Conservative caries removal
• Small cavity preparations
• Tooth structure preservation
• Adhesive restorative procedures

 

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Why Choose the Frank Dental D.807 Diamond Inverted Cone Bur?

The Frank Dental D.807 Diamond Inverted Cone Bur combines:

• Precision German engineering
• Premium natural diamond technology
• Excellent tactile control
• Conservative cutting performance
• Efficient cavity refinement
• Predictable undercut preparation

Its specialised inverted cone design makes it an essential bur for dentists performing operative dentistry, cavity preparation and restorative procedures requiring accurate retention form and conservative undercut creation.

For clinicians seeking a high-quality diamond cavity preparation bur with excellent cutting efficiency and predictable restorative outcomes, the Frank Dental D.807 provides a highly effective professional solution.