Periodontal Anatomy and Disease Classification (160
Questions plus answers
Set 1: Periodontal Anatomy and Disease Classification
1. What is the anatomical term for the space located between the free gingiva and the
surface of the tooth?
o A) Interdental gingiva
o B) Gingival sulcus
o C) Junctional epithelium
o D) Periodontal ligament
o Answer: B) Gingival sulcus
2. Explain why a clinically normal gingival sulcus should not exceed a depth of 3 mm.
What implications does this have for periodontal health?
o A) A deeper sulcus indicates healthy tissue and good oral hygiene.
o B) A sulcus depth greater than 3 mm may suggest periodontal disease.
o C) The depth of the sulcus is irrelevant to periodontal health.
o D) Normal sulcus depth varies based on individual anatomy.
o Answer: B) A sulcus depth greater than 3 mm may suggest periodontal disease.
3. What is the term for the thin layer of bone that directly surrounds the root of a
tooth within the socket?
o A) Cancellous bone
o B) Periosteum
o C) Alveolar bone proper
o D) Compact bone
o Answer: C) Alveolar bone proper
4. Explain the role of alveolar bone proper in the context of tooth extraction and
healing.
o A) It provides structural support for the tooth and aids in the healing process.
o B) It is the outer layer of bone that protects the tooth socket.
o C) It is the spongy bone that fills the interior of the jaw.
o D) It connects the tooth to the surrounding gums.
o Answer: A) It provides structural support for the tooth and aids in the healing process.
5. Explain the role of the gingiva in maintaining periodontal health during
mastication.
o A) It provides structural support to the teeth.
o B) It prevents food particles from entering the periodontal space.
o C) It holds the gingival tissue against the tooth to protect it during chewing.
o D) It facilitates the movement of the teeth.
o Answer: C) It holds the gingival tissue against the tooth to protect it during chewing.
, 6. What structure primarily serves to cushion the tooth from occlusal forces during
chewing?
o A) Periodontal ligament
o B) Gingiva
o C) Cementum
o D) Alveolar bone
o Answer: A) Periodontal ligament
7. Which one is NOT a function of the periodontal ligament?
o A) Hold the tooth in the alveolus
o B) Help tooth withstand compressive forces from chewing
o C) Serves as a source of sensation
o D) Act as a cushion to prevent the enamel from fracturing
o Answer: D) Act as a cushion to prevent the enamel from fracturing
8. Which lymph nodes are primarily responsible for draining the periodontal tissues?
o A) Deep cervical
o B) Submental
o C) Jugulodigastric
o D) Submandibular
o Answer: D) Submandibular
9. Interdental papilla consists of a facial papilla, lingual papilla, and col. A col is
missing if adjacent teeth are not touching.
o A) Both true
o B) Both false
o C) 1st true, 2nd false
o D) 1st false, 2nd true
o Answer: A) Both true
10. Explain why physiologic pigmentation is more prevalent in dark-skinned
individuals compared to light-skinned individuals.
o A) Due to genetic factors influencing melanin production
o B) Because of environmental exposure to sunlight
o C) As a result of dietary differences
o D) Due to the presence of certain dental conditions
o Answer: A) Due to genetic factors influencing melanin production
Set 2: Periodontal Disease Classification
1. What are the defining characteristics of Stage I periodontal disease severity?
o A) Interdental clinical attachment loss (CAL) of 1-2 mm; Radiographic bone loss limited
to the coronal third of the root; No tooth loss.
o B) Interdental clinical attachment loss (CAL) of 3-4 mm; Radiographic bone loss
extending to the mid third of the root; Tooth loss of 1-2 teeth.
, o C) Interdental clinical attachment loss (CAL) of 5 mm or more; Radiographic bone loss
extending beyond the mid third of the root; Tooth loss of 3 or more teeth.
o D) Interdental clinical attachment loss (CAL) of 0-1 mm; No radiographic bone loss; No
tooth loss.
o Answer: A) Interdental clinical attachment loss (CAL) of 1-2 mm; Radiographic bone loss
limited to the coronal third of the root; No tooth loss.
2. Which of the following characteristics is indicative of Stage I periodontal disease
complexity?
o A) A maximum probing depth of 5 mm or more
o B) Mostly vertical bone loss
o C) A maximum probing depth of 4 mm or less
o D) Significant tooth mobility
o Answer: C) A maximum probing depth of 4 mm or less
3. Which of the following accurately describes the characteristics of Stage II
periodontal disease severity?
o A) Interdental CAL of 3-4 mm at site of greatest loss; Radiographic bone loss extending
to coronal third of the root; No tooth loss.
o B) Interdental CAL of 5 mm or more at site of greatest loss; Radiographic bone loss
extending to mid third of the root; Tooth loss of 4 or fewer.
o C) Interdental CAL of 1-2 mm at site of greatest loss; Radiographic bone loss limited to
the cervical third of the root; No tooth loss.
o D) Interdental CAL of 5 mm or more at site of greatest loss; Radiographic bone loss
extending to the apical third of the root; Tooth loss of 5 or more.
o Answer: A) Interdental CAL of 3-4 mm at site of greatest loss; Radiographic bone loss
extending to coronal third of the root; No tooth loss.
4. Which of the following characteristics is indicative of Stage II periodontal disease
complexity of management?
o A) Interdental clinical attachment loss of 6 mm or more
o B) Maximum probing depth of 5 mm or less
o C) Radiographic bone loss extending to the apical third of the root
o D) Tooth loss due to periodontitis of 6 or more teeth
o Answer: B) Maximum probing depth of 5 mm or less
5. Which of the following criteria is NOT characteristic of Stage III Disease Severity in
periodontal disease classification?
o A) Interdental clinical attachment loss (CAL) of 5 mm or more at the site of greatest loss
o B) Radiographic bone loss that extends to the mid third of the root or beyond
o C) Tooth loss due to periodontitis of 5 or more teeth
o D) Presence of probing depths that may exceed 6 mm
o Answer: C) Tooth loss due to periodontitis of 5 or more teeth
6. Which of the following clinical findings is indicative of Stage III periodontal disease
complexity of management?
o A) Probing depths of 5 mm or less with horizontal bone loss
Questions plus answers
Set 1: Periodontal Anatomy and Disease Classification
1. What is the anatomical term for the space located between the free gingiva and the
surface of the tooth?
o A) Interdental gingiva
o B) Gingival sulcus
o C) Junctional epithelium
o D) Periodontal ligament
o Answer: B) Gingival sulcus
2. Explain why a clinically normal gingival sulcus should not exceed a depth of 3 mm.
What implications does this have for periodontal health?
o A) A deeper sulcus indicates healthy tissue and good oral hygiene.
o B) A sulcus depth greater than 3 mm may suggest periodontal disease.
o C) The depth of the sulcus is irrelevant to periodontal health.
o D) Normal sulcus depth varies based on individual anatomy.
o Answer: B) A sulcus depth greater than 3 mm may suggest periodontal disease.
3. What is the term for the thin layer of bone that directly surrounds the root of a
tooth within the socket?
o A) Cancellous bone
o B) Periosteum
o C) Alveolar bone proper
o D) Compact bone
o Answer: C) Alveolar bone proper
4. Explain the role of alveolar bone proper in the context of tooth extraction and
healing.
o A) It provides structural support for the tooth and aids in the healing process.
o B) It is the outer layer of bone that protects the tooth socket.
o C) It is the spongy bone that fills the interior of the jaw.
o D) It connects the tooth to the surrounding gums.
o Answer: A) It provides structural support for the tooth and aids in the healing process.
5. Explain the role of the gingiva in maintaining periodontal health during
mastication.
o A) It provides structural support to the teeth.
o B) It prevents food particles from entering the periodontal space.
o C) It holds the gingival tissue against the tooth to protect it during chewing.
o D) It facilitates the movement of the teeth.
o Answer: C) It holds the gingival tissue against the tooth to protect it during chewing.
, 6. What structure primarily serves to cushion the tooth from occlusal forces during
chewing?
o A) Periodontal ligament
o B) Gingiva
o C) Cementum
o D) Alveolar bone
o Answer: A) Periodontal ligament
7. Which one is NOT a function of the periodontal ligament?
o A) Hold the tooth in the alveolus
o B) Help tooth withstand compressive forces from chewing
o C) Serves as a source of sensation
o D) Act as a cushion to prevent the enamel from fracturing
o Answer: D) Act as a cushion to prevent the enamel from fracturing
8. Which lymph nodes are primarily responsible for draining the periodontal tissues?
o A) Deep cervical
o B) Submental
o C) Jugulodigastric
o D) Submandibular
o Answer: D) Submandibular
9. Interdental papilla consists of a facial papilla, lingual papilla, and col. A col is
missing if adjacent teeth are not touching.
o A) Both true
o B) Both false
o C) 1st true, 2nd false
o D) 1st false, 2nd true
o Answer: A) Both true
10. Explain why physiologic pigmentation is more prevalent in dark-skinned
individuals compared to light-skinned individuals.
o A) Due to genetic factors influencing melanin production
o B) Because of environmental exposure to sunlight
o C) As a result of dietary differences
o D) Due to the presence of certain dental conditions
o Answer: A) Due to genetic factors influencing melanin production
Set 2: Periodontal Disease Classification
1. What are the defining characteristics of Stage I periodontal disease severity?
o A) Interdental clinical attachment loss (CAL) of 1-2 mm; Radiographic bone loss limited
to the coronal third of the root; No tooth loss.
o B) Interdental clinical attachment loss (CAL) of 3-4 mm; Radiographic bone loss
extending to the mid third of the root; Tooth loss of 1-2 teeth.
, o C) Interdental clinical attachment loss (CAL) of 5 mm or more; Radiographic bone loss
extending beyond the mid third of the root; Tooth loss of 3 or more teeth.
o D) Interdental clinical attachment loss (CAL) of 0-1 mm; No radiographic bone loss; No
tooth loss.
o Answer: A) Interdental clinical attachment loss (CAL) of 1-2 mm; Radiographic bone loss
limited to the coronal third of the root; No tooth loss.
2. Which of the following characteristics is indicative of Stage I periodontal disease
complexity?
o A) A maximum probing depth of 5 mm or more
o B) Mostly vertical bone loss
o C) A maximum probing depth of 4 mm or less
o D) Significant tooth mobility
o Answer: C) A maximum probing depth of 4 mm or less
3. Which of the following accurately describes the characteristics of Stage II
periodontal disease severity?
o A) Interdental CAL of 3-4 mm at site of greatest loss; Radiographic bone loss extending
to coronal third of the root; No tooth loss.
o B) Interdental CAL of 5 mm or more at site of greatest loss; Radiographic bone loss
extending to mid third of the root; Tooth loss of 4 or fewer.
o C) Interdental CAL of 1-2 mm at site of greatest loss; Radiographic bone loss limited to
the cervical third of the root; No tooth loss.
o D) Interdental CAL of 5 mm or more at site of greatest loss; Radiographic bone loss
extending to the apical third of the root; Tooth loss of 5 or more.
o Answer: A) Interdental CAL of 3-4 mm at site of greatest loss; Radiographic bone loss
extending to coronal third of the root; No tooth loss.
4. Which of the following characteristics is indicative of Stage II periodontal disease
complexity of management?
o A) Interdental clinical attachment loss of 6 mm or more
o B) Maximum probing depth of 5 mm or less
o C) Radiographic bone loss extending to the apical third of the root
o D) Tooth loss due to periodontitis of 6 or more teeth
o Answer: B) Maximum probing depth of 5 mm or less
5. Which of the following criteria is NOT characteristic of Stage III Disease Severity in
periodontal disease classification?
o A) Interdental clinical attachment loss (CAL) of 5 mm or more at the site of greatest loss
o B) Radiographic bone loss that extends to the mid third of the root or beyond
o C) Tooth loss due to periodontitis of 5 or more teeth
o D) Presence of probing depths that may exceed 6 mm
o Answer: C) Tooth loss due to periodontitis of 5 or more teeth
6. Which of the following clinical findings is indicative of Stage III periodontal disease
complexity of management?
o A) Probing depths of 5 mm or less with horizontal bone loss
