Dental Hygiene and Restorative Practices

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Questions and Answers

What is an important characteristic that temporary crowns should possess?

They should be thicker than permanent crowns.

They should be made of metal only.

They should have margins that fit well. (correct)

They should be left unpolished for better retention.

What is a consequence of amalgam overhangs?

They improve oral hygiene.

They prevent the need for routine cleanings.

They enhance tooth alignment.

They can contribute to gingival inflammation. (correct)

Which factor is crucial for proper crown contouring?

Facilitating oral hygiene (correct)

Eliminating any variation in shape

Increasing embrasure space

Creating sharp edges

What should wearers of removable partial dentures do to maintain their appliances?

Clean them daily with an accepted denture cleaner. Signup and view all the answers

Which condition can negatively impact periodontal health?

Loss of the first molars in children. Signup and view all the answers

What dental issue may arise from poorly aligned teeth due to malocclusion?

Challenge in dental hygiene care. Signup and view all the answers

Which of the following is a reason for increased plaque accumulation in orthodontic patients?

Increased difficulty in cleaning around appliances. Signup and view all the answers

What should be done to minimize the risk of gingival inflammation caused by amalgam overhangs?

Regularly smooth and polish the margins. Signup and view all the answers

What is the average total space occupied by Supracrestal Attached Tissue above the crest of the alveolar bone?

2.04 mm Signup and view all the answers

Which of the following factors contributes to gingival inflammation associated with crowns and restorations?

Subgingival placement of restorations Signup and view all the answers

Which two responses are observed when the restoration margin violates the Supracrestal Attached Tissue?

Unpredictable bone loss and gingival inflammation Signup and view all the answers

What is an important consideration to ensure before restorative treatment?

Healthy gingival sulcus Signup and view all the answers

What effect does the contour of restoration margins have on periodontal health?

Increases surface roughness for biofilm Signup and view all the answers

What should be avoided to maintain a healthy gingival environment around restorations?

Subgingival placements Signup and view all the answers

Which of the following can result from the placement of orthodontic bands?

Gingival recession Signup and view all the answers

Which factor is NOT considered a biofilm retentive factor affecting periodontal health?

Effective plaque control Signup and view all the answers

What is the most common direction of tooth migration when there are unreplaced missing teeth?

Mesial direction Signup and view all the answers

What anatomical effect does first molar loss have on surrounding teeth?

Loss of vertical dimension occurs Signup and view all the answers

What is a common consequence of mouth breathing associated with gingival inflammation?

Increased localized inflammation in the labial gingiva Signup and view all the answers

Which of the following is a key factor that aggravates periodontal disease?

Combination of tobacco and alcohol use Signup and view all the answers

What is an effect of tobacco use on the gingival tissues?

Increased keratinization and vasoconstriction Signup and view all the answers

What type of plaque accumulation is associated with mouth breathing?

Higher levels of plaque and gingivitis Signup and view all the answers

Which of the following complications can arise from the use of tobacco products?

Development of acute aggressive forms of periodontal disease Signup and view all the answers

Which intervention is recommended for managing localized gingival inflammation due to mouth breathing?

Placement of petroleum jelly over the tissue Signup and view all the answers

Study Notes

Temporary Crowns

Well-fitting margins are crucial.
Polishing minimizes roughness.

Crown Contours and Margins

Embrasure space preservation is essential.
Contours should facilitate oral hygiene, especially in furcation areas.
Customized oral hygiene instructions are necessary.
Healthy gingival sulcus is needed before restorative treatment.
Margins should be kept away from the gingiva.
A thin cement line at crown margins allows biofilm adhesion.

Amalgam Overhangs

Contribute to gingival inflammation.
Removal is a legally permitted duty for dental hygienists in many states.

Removable Partial Dentures

Collect supragingival calculus.
Daily cleaning with appropriate tools is recommended.
Natural teeth adjacent to removable partial dentures may have deep pockets, increased caries susceptibility, so proper oral hygiene and home care are vital.

Conditions Affecting Periodontal Health

Orthodontic appliances.
Malocclusion.
Oral habits (e.g., mouth breathing).
Loss of first molars in children.
Tobacco and alcohol use.

Orthodontics

Increases plaque, gingivitis, and caries.
Bone loss in adults occurs if periodontal disease is uncontrolled.
Excessive orthodontic force increases apical root resorption risk.

Root Resorption after Orthodontic Treatment

Visual representation of before and after root resorption (image referenced).

Orthodontic Appliances

(Image referenced)

Trauma

Toothbrush and flossing trauma.
Self-inflicted injuries and habits.
Oral jewelry (e.g., tongue piercing affecting mandibular incisors).
Chemical irritation (allergies, burns, bleaching).
Food impaction.
Smokeless tobacco.
Radiation therapy (mucositis).
Occlusal trauma (does not cause initial pocket formation).

Malocclusion

Poor alignment alters embrasure spaces, hindering hygiene.

Biofilm Retentive Factors

Over-contoured or worn restorations.
Food impaction areas.
Orthodontic bands and brackets.

Average Supracrestal Attached Tissue

Connective tissue attachment: 1.07 mm above alveolar bone crest.
Junctional epithelium attachment: 0.97 mm above connective tissue attachment.
Total supracrestal attached tissue: ~2.04 mm (can range from 0.75 mm to 4.3 mm). Previously called biologic width.

Violation of Supracrestal Attached Tissue

Restoration margins placed too low cause unpredictable bone loss and gingival recession or gingival inflammation without bone level change.

Over-contoured Crowns and Bridges

Associated with gingival inflammation and periodontal disease.
Subgingival placement increases plaque biofilm formation due to surface roughness, margin fit, and restoration contour.

Unreplaced Missing Teeth

Increased occlusal pressure on remaining teeth.
Contributes to tooth migration (mesial drift is common, premolars can drift distally).

First Molar Loss

Associated with gingival inflammation and pocket formation.
Second and third molars drift mesially and tilt, causing loss of vertical dimension.
Mandibular premolars drift distally and can tilt.

Mouth Breathing

Localized gingival inflammation (labial gingiva of maxillary anterior teeth).
Reddened, swollen, shiny tissue that bleeds easily.
Higher plaque and gingivitis levels.
Inflammation unresponsive to therapy; palliative care may involve petroleum jelly or saliva substitutes.

Anatomic Anomalies

Variations in tooth anatomy require careful instrumentation. (Image referenced)

Tongue and Lip Piercing

(Image referenced)

Tobacco and Alcohol Use

Increases periodontal disease severity.
Combined use significantly increases oral and other cancers risk.

Tobacco Use

Strong risk factor for periodontal disease (cigarettes, cigars, smokeless tobacco).
Increased calculus and stains; aggressive periodontal disease is more common in smokers.
Toxic effects regardless of tobacco form. Causes increased keratinization and vasoconstriction of gingival tissues. Nicotine metabolites are found in saliva and gingival crevicular fluid.

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Description

This quiz covers essential principles in dental hygiene and restorative practices, focusing on temporary crowns, crown contours, amalgam overhangs, and the care of removable partial dentures. It also addresses conditions affecting periodontal health. Test your knowledge on how these elements contribute to oral hygiene and overall dental care.