Week 10 (chapter 21): Advance techniques for root instrumentation

What is the definition of a root concavity according to dental anatomy principles?

A linear developmental depression in the root surface

Which of the following describes the typical shape of a root concavity?

Linear

Where is a root concavity specifically located on a tooth?

On the root surface

According to the text, why does root surface morphology complicate periodontal instrumentation?

Because roots are often hidden from view within deep pockets

What is considered a prerequisite for effective instrumentation of root surfaces?

Complete knowledge of root morphology

On which tooth is a palatal groove (linguogingival groove) most commonly found as a significant clinical feature?

Maxillary Lateral Incisor

The palatal groove is located on which specific surface of the tooth?

Lingual surface

True or False: A palatal groove is a developmental depression that can extend from the crown onto the root surface.

True

On which specific surfaces of the mandibular canine is a deep, linear root concavity most prominently found?

Proximal surfaces

What are the specific names of the 'proximal surfaces' mentioned in your notes?

Mesial and Distal

True or False: A 'linear root concavity' is a horizontal ridge found on the enamel of the crown.

False

Which phrase best describes the root concavity found on the mesial surface of a mandibular molar?

Wide and shallow

On which surface of the mandibular molar is this wide, shallow concavity specifically located?

Mesial surface

True or False: The mandibular molar is a permanent tooth that typically has two roots, and the mesial root often contains this concavity.

True

What anatomical feature often accompanies the deep concavity on the maxillary first premolar root?

A furcation

True or False: The deep linear concavity on the maxillary first premolar often begins on the crown and extends onto the root.

True

Where is the deep depression typically located on the mandibular molar before it reaches the furcation?

On the root trunk of the facial surface

What anatomical landmark does the deep depression on the facial root trunk eventually lead to?

The furcation

True or False: The facial surface of a mandibular molar root is completely flat until it reaches the apex.

False

On a maxillary molar, where does the proximal concavity typically extend from and to?

From the furcation to the CEJ

Which surface of the maxillary molar is specifically identified in your notes as having this concavity?

Proximal surface

True or False: The concavity on the proximal surface of a maxillary molar is a linear depression found on the root trunk.

True

What happens when the working end of a periodontal instrument 'spans across' a root concavity?

Any calculus located within the concavity will be missed

According to the correct technique, what action must the clinician take to adapt to a root concavity?

Roll the handle to direct leading-third into the concavity

Which combination of stroke directions is recommended to thoroughly explore and debride a concavity on a proximal surface?

Both vertical and horizontal strokes

According to the provided clinical principle, how should a clinician ensure a root concavity is thoroughly explored?

By exploring from both the facial and lingual aspects

What is considered the best clinical approach when instrumenting multirooted teeth?

Instrument each root as if it were a separate, single-rooted tooth

When instrumenting a mandibular molar, what should the clinician imagine the two roots to be?

The single roots of two separate premolar teeth

According to the notes, why is it important to keep the location of furcations in mind?

The relationship between the CEJ and the furcation can vary