DT L10

Area-Specific Curets

  • Purpose: Used for removing light calculus deposits from teeth.

  • Types: Mini-Five, After-Five, Standard Vision, Gracey curets.

Design Characteristics

  • Shank Types: Long and complex or simple.

  • Functionality: Specialized for instrumentation of root surfaces.

Specialized Instruments

  • Extended Lower Shanks: Instrument A has a standard lower shank while Instrument B has an extended lower shank (3mm longer).

  • Thinner Working End: The instrument with an extended lower shank is 10% thinner than standard instruments.

  • Purpose: To access middle and apical thirds of the root surface.

Common Features of Area-Specific Curets

  • Rounded Back: Similar to universal curets.

  • Rounded Toe & Semicircular Cross-section: Important design aspects facilitating use in periodontal care.

Unique Design Features

  • Curved Cutting Edges: Differentiates from universal curets which have parallel cutting edges.

Important Relationships in Curet Design

  • Face to Lower Shank Relationship: Unique feature making area-specific curets special.

  • Tilted Face: Lower cutting edge is positioned lower than the other cutting edge due to tilt.

Cutting Edges

  • Lower Cutting Edge: Used primarily for calculus removal (70-degree angle for effective angulation).

  • Working Cutting Edge: Refers to the lower cutting edge made for instrumentation.

  • Nonworking Cutting Edge: Angled away from the soft tissue wall of the pocket, protecting soft tissues during use.

Identification of Cutting Edges

  • Importance of Knowing Lower Cutting Edge: Crucial for sharpening and effective use.

  • Identification Steps:

    1. Hold instrument to view toe.

    2. Adjust handle until shank is perpendicular.

    3. Identify the lower cutting edge based on its proximity to the floor.

    4. Remember that only the lower edge requires sharpening.

Summary of Features

  • Long, complex lower shanks.

  • Tilted face relative to the lower shank.

  • One working cutting edge per working-end.

Utilization of Area-Specific Curets on Anterior Teeth

  • Orientation: Face tilts slightly toward the anterior tooth for correct positioning.

  • Step-by-Step Technique:

    1. Prepare in Get Ready Zone.

    2. Insert with the face hugging the tooth surface.

    3. Adapt the toe-third into position.

    4. Roll instrument handle while approaching mesiofacial line angle to maintain adaptation.

    5. Work halfway across mesial surface.

Sequencing for Sextant Cleaning

  • Sequential approach for sextants should progress from 1-6.

Utilization of Area-Specific Curets on Posterior Sextants

  • Visual Clue for Correct Positioning:

    • Lower shank parallel to proximal surface.

    • Functional shank maneuvering "up and over" the tooth.

  • Memory Aid: Posterior = Parallel with functional shank.

Instrumentation Techniques for Distal Surfaces

  • Instruments: Gracey 13, 14, 17, and 18.

  • Recommended to start with the distal surface.

Technique for Handling Instruments on Distal Surfaces

  • Place working-end in the Get Ready Zone near the distofacial line angle.

  • Ensure lower shank is parallel for correct angulation at 70-degrees.

  • Begin with the posterior-most tooth and move forward.

Instrumentation Techniques for Facial and Mesial Surfaces

  • Instruments: Gracey 11, 12, 15, and 16.

  • Begin cleaning from the distofacial line angle to mesial.

  • Important Steps: 4. Correctly position and lower handle for effective insertion and use. 5. Roll handle as necessary to maintain adaptation while cleaning.

Conclusion

  • Emphasize the importance of proper technique and instrument design in effective periodontal care.