D.856KFS.021.SG.FG_D

The Frank Dental Tapered Chamfer Round End with Guide Pin has been specifically developed for clinicians seeking highly controlled, tissue-preserving crown preparations with accurate subgingival margin placement. This advanced crown preparation bur combines a tapered chamfer diamond geometry with an integrated 0.5 mm guide pin, allowing dentists to prepare precise margins whilst helping to protect the periodontal attachment and biological width.

In modern prosthodontic and restorative dentistry, preservation of the biological width is critical for maintaining long-term periodontal health around indirect restorations. During subgingival crown preparation there is always a risk of over-preparation into the epithelial and connective tissue attachment, which may lead to inflammation, recession, bone loss or compromised restorative outcomes. The integrated guide pin within the Frank Dental chamfer preparation bur helps minimise this risk by maintaining a predefined distance from the periodontium during margin preparation.

The 0.5 mm long guide pin acts as a depth and positioning guide during preparation, helping clinicians achieve controlled and repeatable subgingival chamfer margins. This creates a more conservative and biologically respectful preparation technique compared to freehand subgingival reduction. The guide pin also improves tactile control and visibility when preparing difficult cervical margins, particularly in deep sulcus areas or posterior teeth.

The bur creates a precise cutting depth of approximately 0.54 mm in size 021 at the crown margin. This controlled reduction is particularly beneficial when preparing teeth for modern conservative ceramic restorations where excessive tooth reduction is unnecessary. The rounded chamfer end geometry creates smooth internal line angles, helping reduce stress concentration within brittle restorative materials such as zirconia and lithium disilicate ceramics.

Where Would You Use a Guide Pin Crown Preparation Bur?

The Frank Dental Tapered Chamfer Round End with Guide Pin is particularly useful for:

• Subgingival crown margin preparations
• Anterior aesthetic crown cases
• Deep cervical margin preparations
• Minimally invasive prosthodontic preparations
• Tissue-preserving crown and bridge dentistry
• CAD/CAM crown preparations
• Biologically guided crown preparations
• Cases requiring highly accurate chamfer finish lines
• Crown preparations near the epithelial attachment

The bur is especially valuable when clinicians need to create precise margins whilst reducing the risk of damaging soft tissues and the biological width.

Suitable Crown Materials

This type of chamfer crown preparation bur is ideal for preparing teeth for:

• Monolithic zirconia crowns
• Lithium disilicate crowns (E.max)
• Porcelain fused to metal (PFM) crowns
• Full gold crowns
• Ceramic overlays and onlays
• CAD/CAM ceramic restorations

The conservative chamfer design is particularly recommended for zirconia and metal-based restorations because these materials do not require the heavy reduction associated with traditional shoulder preparations. The smooth chamfer margin also improves crown seating, marginal adaptation and digital impression accuracy.

Advantages of the Guide Pin Design

• Helps protect the biological width
• Maintains a controlled distance from the periodontium
• Reduces the risk of soft tissue trauma
• Improves consistency of subgingival margin preparations
• Enhances tactile control during crown preparation
• Creates highly accurate chamfer margins
• Supports minimally invasive restorative dentistry
• Improves periodontal preservation around crowns
• Reduces over-preparation in cervical regions

The Frank Dental Tapered Chamfer Round End with Guide Pin provides clinicians with a highly precise and biologically respectful approach to crown preparation, combining controlled tooth reduction, periodontal protection and predictable restorative outcomes for modern ceramic and CAD/CAM dentistry.