U2 - Gracey Curettes & Calculus Removal

What are the three types of instrumentation strokes reviewed in this lecture?

Assessment/exploratory, calculus removal/scaling, and root debridement.

What lateral pressure is used for assessment/exploratory strokes?

Little to no lateral pressure.

What stroke length and pressure are used for calculus removal/scaling?

Short, controlled strokes with firm lateral pressure.

What stroke length and pressure are used for root debridement?

Long strokes with moderate lateral pressure.

What is the key difference between scaling and root debridement strokes?

Scaling uses short, controlled, firm-pressure strokes; root debridement uses longer strokes with moderate pressure.

Should a large calculus deposit be removed by shaving off one outer layer at a time?

No. Work in sections or zones and remove the calculus in each zone before advancing.

What must be completed before moving to the next calculus removal zone?

Remove all detectable calculus from the current zone.

What three basic stroke directions are reviewed?

Vertical, horizontal, and oblique.

What does multidirectional instrumentation mean in the lecture?

Using vertical, horizontal, and oblique strokes.

Which procedure uses multidirectional strokes?

Root planing.

What is the first action in the supragingival calculus removal sequence?

Position the working end just apical to the calculus deposit.

After positioning the working end for supragingival scaling, what should you do?

Lock the toe-third against the enamel and open the face to the proper working angulation.

What working angulation is listed for the supragingival scaling sequence?

Approximately 80 degrees, for the supragingival sequence.

What pressure is applied against the instrument handle while locking the toe-third?

Inward pressure using the index finger and thumb.

In what direction is the supragingival calculus removal stroke activated?

Away from the gingival tissue.

How should the calculus removal stroke be performed?

Short and biting, with the toe-third locked against the enamel.

What should the clinician do between calculus removal strokes?

Pause briefly, relax the grasp, and reposition the working end.

Why pause briefly between scaling strokes?

To relax the fingers in the grasp and reset for the next controlled stroke.

What palm direction is reviewed for maxillary instrumentation?

Palm up.

What palm direction is reviewed for mandibular instrumentation?

Palm down.

What is especially important for detecting subgingival calculus?

The clinician must rely on the sense of touch.

What portion of the cutting edge should be adapted to the tooth?

The terminal 1-2 mm of the working end/cutting edge.

What is the terminal third of a curette working end called?

The toe third (terminal 1-2 mm for adaptation).

What is insertion in subgingival instrumentation?

Gently sliding the working end beneath the gingival margin into the sulcus or periodontal pocket.

Should the face be open or closed during subgingival insertion?

Closed.

What angulation range is used for subgingival insertion?

Approximately 0-40 degrees, with a closed face.

When should the curette face be opened for calculus removal?

After inserting the closed face to the appropriate subgingival depth.

Should the instrument lose tooth contact during subgingival insertion?

No. Maintain contact with the tooth throughout insertion.

What instrument part is the guide for angulation according to the handwritten note?

The terminal (lower) shank.

What are the four steps of subgingival instrument application?

1. Get ready; 2. Close face and insert; 3. Reach proper depth; 4. Angulate and activate.

What is step 1 of the subgingival application sequence?

Get ready: establish the instrument position.

What is step 2 of the subgingival application sequence?

Close the face and insert beneath the gingival margin.

What is step 3 of the subgingival application sequence?

Advance to the proper subgingival depth.

What is step 4 of the subgingival application sequence?

Establish working angulation and activate the stroke.

Which calculus removal instrument families are listed?

Sickle scalers and curettes; curettes include universal and Gracey area-specific types.

What type of curette is a Gracey?

An area-specific curette.

What is the shape of an area-specific Gracey curette toe?

Rounded.

What is the cross-sectional shape of an area-specific curette?

Semicircular.

How is a Gracey curette face oriented relative to the lower shank?

The face is tilted at approximately 70 degrees relative to the lower shank.

How many cutting edges of a Gracey working end are used during instrumentation?

One: the lower cutting edge.

Which cutting edge of an area-specific curette is the working edge?

The lower cutting edge.

What does the handwritten note mean when it calls a Gracey self-angulated?

Its face is offset about 70 degrees to the lower shank, so positioning the terminal shank parallel to the tooth establishes working angulation.

What is the face-to-terminal-shank angle of a sickle scaler?

90 degrees.

What is the face-to-terminal-shank angle of a universal curette?

90 degrees.

What is the face-to-lower-shank angle of an area-specific Gracey curette?

70 degrees.

Which instruments have 90-degree faces in the comparison chart?

The sickle scaler and universal curette.

Which instrument in the comparison chart has a 70-degree tilted face?

The area-specific Gracey curette.

What shank position is emphasized during Gracey activation?

Keep the terminal/lower shank parallel to the long axis of the tooth or root surface.

What are the two key actions for beginning subgingival instrumentation with an area-specific curette?

1. Insert with a closed face; 2. Stand tall and activate to begin removal.

What does "stand tall" refer to in the Gracey lecture note?

Position the terminal shank upright/parallel to the long axis of the tooth before activating.

How do you begin identifying the lower cutting edge on a Gracey?

Hold the instrument and look directly at the toe of the working end.

How should the lower shank be oriented when identifying the Gracey working edge?

Perpendicular to the floor.

When identifying a Gracey working edge, what should be perpendicular to the floor: handle or terminal shank?

The terminal/lower shank, not necessarily the handle.

After aligning the lower shank vertically, how do you find the working cutting edge?

Look for the edge that sits lower, closer to the floor.

What are three indications for Gracey curettes?

Subgingival calculus removal, difficult-to-reach areas, and root planing.

Why are Gracey curettes useful in difficult-to-reach areas?

Their area-specific design facilitates adaptation to selected root surfaces.

How does the lecture define root planing?

Removing residual plaque, calculus, and portions of cementum and dentin to produce a smooth, clean root surface.

What stroke pattern is specified for root planing?

Multidirectional strokes.

What are the four Gracey curette variants covered in the lecture?

Mini Five, After Five, Rigid, and Standard.

Which Gracey variant has a working blade 50% shorter than standard?

Mini Five.

Which Gracey variants have a terminal shank 3 mm longer than standard?

Mini Five and After Five.

Which Gracey variants have blades 10% thinner than standard?

Mini Five and After Five.

What are the design modifications of the Mini Five Gracey?

A 50% shorter blade, a 10% thinner blade, and a terminal shank 3 mm longer.

What are the design modifications of the After Five Gracey?

A 10% thinner blade and a terminal shank 3 mm longer.

What clinical areas are emphasized in the handwritten note about modified Graceys?

Difficult furcations and deep periodontal pockets.

Why can a Mini Five be useful in a narrow or difficult root area?

Its shorter, thinner blade and extended shank facilitate access and adaptation.

What is the main purpose of the extra 3 mm terminal shank length in After Five and Mini Five curettes?

To improve access into deeper periodontal pockets.

What does the handwritten note say about Gracey numbers and tooth location?

In general, higher Gracey numbers are used farther posteriorly.

Which Gracey curettes does the lecture specifically teach for anterior instrumentation?

Gracey 1/2.

Which Gracey curette is taught for posterior mesial surfaces?

Gracey 11/12.

Which Gracey curette is taught for posterior distal surfaces?

Gracey 13/14.

What tooth region is assigned to Gracey 1/2 in the table?

Anterior teeth, all tooth surfaces.

What tooth region is assigned to Gracey 3/4 in the table?

Anterior teeth, all tooth surfaces.

What applications are listed for Gracey 5/6 in the table?

Anterior teeth (all surfaces); premolar teeth (all surfaces); and molar facial, lingual, and mesial surfaces.

What are Gracey 7/8 and 9/10 used for in the table?

Posterior teeth, especially facial and lingual surfaces; the table also lists anterior applications.

What surfaces are listed for Gracey 11/12 in the table?

Anterior teeth, all surfaces, and posterior teeth, mesial surfaces only.

What surfaces are listed for Gracey 13/14 in the table?

Anterior teeth, mesial and distal surfaces, and posterior teeth, distal surfaces.

What is the listed use for Gracey 15/16?

Posterior facial, lingual, and mesial surfaces; the table notes it is not part of the original Gracey series.

What is the listed use for Gracey 17/18?

Posterior distal surfaces; the table notes it is not part of the original Gracey series.

What is the first step in establishing clinician position?

Assume the clock position for the treatment area.

What is the second step in the clinician positioning sequence?

Establish patient chair and head position.

What is the third step in the clinician positioning sequence?

Adjust the unit light, pause and self-check clinician, patient, and equipment position.

What does the nondominant hand do during clinician positioning?

Place the fingers of the nondominant hand appropriate to the clock position.

What does the dominant hand do during clinician positioning?

Place the fingers of the dominant hand appropriate to the clock position.

After clinician and hand positioning, what three stages are highlighted for instrumentation?

1. Grasp; 2. Fulcrum, insertion, adaptation, and angulation; 3. Activate.

How do you identify the correct working end for an anterior Gracey 1/2?

Hold the handle with the toe facing you, orient the terminal shank perpendicular to the floor, and select the lower cutting edge.

For a Gracey 1/2, which side of the face should contact the tooth?

The lower cutting edge, the side angled downward when the terminal shank is straight.

How do you distinguish the correct from the incorrect working end of a Gracey 1/2?

Choose the working end that adapts the lower cutting edge to the tooth rather than the opposite edge.

Which posterior tooth surfaces are treated with a Gracey 11/12?

Facial, lingual, and mesial surfaces of posterior teeth, .

Which direction does the Gracey 11/12 sequence move?

Mesially.

Where does the Gracey 11/12 sequence begin?

At the distal line angle.

What is the primary proximal surface for a Gracey 11/12?

Mesial surfaces of posterior teeth.

How do you identify the correct working end for Gracey 11/12?

Orient the terminal shank straight/perpendicular to the floor, not the handle, and identify the lower cutting edge.

What are the primary clinical applications of Gracey 13/14?

Distal surfaces of posterior teeth.

Where does the Gracey 13/14 sequence begin?

At the distal line angle.

How do you identify the correct working end for Gracey 13/14?

Orient the terminal shank straight/perpendicular to the floor, not the handle, and identify the lower cutting edge.

Which Gracey is indicated for a posterior tooth distal surface?

Gracey 13/14.

Which Gracey is indicated for a posterior tooth mesial surface?

Gracey 11/12.

Which Gracey is indicated for anterior tooth surfaces in this lecture's practical section?

Gracey 1/2.

A clinician is about to instrument the mesial root surface of a mandibular molar. Which Gracey from this lecture is indicated?

Gracey 11/12.