MJDF Periodontology Fundamentals 2

Question 1

According to the 2017 World Workshop classification, which of the following BEST describes Stage III Grade C periodontitis?

Accepted Answer

Severe bone loss or tooth loss with complexity factors such as masticatory dysfunction, and a rapid rate of progression possibly associated with systemic factors or risk factors like smoking

Answer

Mild bone loss, slow progression, no complexity factors, associated with local factors only

Answer

Moderate bone loss with no systemic disease association and moderate rate of progression

Answer

Gingivitis only, reversible, no bone loss

Question 2

What is the primary cause of chronic periodontitis?

Accepted Answer

Subgingival dental plaque (biofilm) and the host's inflammatory response to it

Answer

A genetic predisposition independent of plaque levels

Answer

Mechanical trauma from occlusal forces

Answer

Systemic disease alone without local plaque accumulation

Question 3

In periodontal assessment, a 'bleeding on probing' (BOP) score is important because:

Accepted Answer

BOP indicates the presence of gingival inflammation and is used to monitor disease activity and treatment response

Answer

BOP only occurs in advanced periodontitis and indicates imminent tooth loss

Answer

BOP is a normal finding in healthy gingiva and requires no action

Answer

BOP indicates infection with a specific periodontopathogen and guides antibiotic selection

Question 4

What is the purpose of subgingival debridement (root surface debridement/RSD) in the non-surgical treatment of periodontitis?

Accepted Answer

To mechanically disrupt and remove the subgingival biofilm and calculus from root surfaces, reducing the bacterial load causing periodontal inflammation

Answer

To remove all cementum from the root surface to expose clean dentine

Answer

To surgically remove the inflamed periodontal pocket lining

Answer

To apply fluoride to exposed root surfaces to prevent caries

Question 5

Which furcation classification system grades furcation involvement using a probe measurement, and what does Class II indicate?

Accepted Answer

Hamp classification — Class II means the probe penetrates >3mm horizontally into the furcation but does not pass through

Answer

Ramfjord classification — Class II means bone loss is present but less than 50% of the buccal/lingual width

Answer

Nabers probe system — Class II means the tooth requires immediate extraction

Answer

BSP Basic Periodontal Examination — Class II means the tooth has a 4-5mm pocket with furcation exposure

Question 6

Which systemic condition has the STRONGEST evidence for bidirectional association with periodontitis?

Accepted Answer

Diabetes mellitus

Answer

Rheumatoid arthritis

Answer

Cardiovascular disease

Answer

Chronic kidney disease