Dental Anatomy Quiz (Chapter 2)

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Questions and Answers

What is the correct order of naming point angles?

  • Proximal, facial or lingual, incisal or occlusal (correct)
  • Facial, mesial, occlusal
  • Incisal, labial, mesial
  • Lingual, facial, incisal

How many lobes are typically involved in the formation of anterior teeth?

  • Five lobes
  • Four lobes (correct)
  • Three lobes
  • Two lobes

What is the definition of centric occlusion?

  • The relationship between the upper and lower jaws when they are fully opened
  • The position with maximal stable contact between occluding surfaces (correct)
  • The normal position of teeth during active chewing
  • The distance between the upper and lower incisors

What structure forms when two triangular ridges unite on a posterior tooth?

<p>Transverse ridge (A)</p> Signup and view all the answers

Which type of occlusion describes the relationship of teeth during everyday chewing movements?

<p>Functional occlusion (A)</p> Signup and view all the answers

What is the main purpose of centric occlusion?

<p>To ensure effective grinding of food (B)</p> Signup and view all the answers

What are triangular ridges primarily associated with?

<p>Cusps of posterior teeth (D)</p> Signup and view all the answers

Which of the following dental terms refers to a problem in the teeth, joints, and muscles of the head and neck?

<p>Malocclusion (B)</p> Signup and view all the answers

What is a line angle in the context of dental anatomy?

<p>The junction between two surfaces of a tooth (D)</p> Signup and view all the answers

How are line angles named in dental terminology?

<p>By their proximal name first and their occlusal surface last (A)</p> Signup and view all the answers

Which of the following best describes a point angle in dental anatomy?

<p>An area where three surfaces meet (B)</p> Signup and view all the answers

What are the primary functions of teeth based on their shapes and locations?

<p>Holding, cutting, and grinding food (A)</p> Signup and view all the answers

What is the primary function of reparative dentin?

<p>To quickly form in response to dental injuries (C)</p> Signup and view all the answers

Which area of the jaw do maxillary teeth anchor into?

<p>Maxilla (B)</p> Signup and view all the answers

In the context of dental anatomy, what is the alveolus?

<p>The bony socket for a tooth (A)</p> Signup and view all the answers

What tissues of the tooth are classified as hard tissues?

<p>Enamel, dentin, and cementum (A)</p> Signup and view all the answers

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Study Notes

Tooth Anatomy and Structure

  • The mesiolabioincisal point angle is formed where the mesial, labial, and incisal surfaces converge.
  • Teeth develop from lobes, which are growth centers; typically, they start with four or more.
  • Cusp characteristics can vary between teeth; they are formed by four ridges, prominently featuring triangular ridges that extend from the cusp tip to the central occlusal surface.
  • Anterior teeth exhibit two developmental depressions on the labial surface, separating three lobes (mesial, middle, and distal), with a fourth lobe, the cingulum, located on the lingual surface.

Occlusion and Functional Relationships

  • Occlusion refers to the relationship between maxillary and mandibular teeth during a closed jaw position, affecting dental and muscular health.
  • Centric occlusion ensures the best contact between maxillary and mandibular teeth, with the condyles in the unstrained position of the glenoid fossa; it serves as the standard for normal occlusion.
  • In normal occlusion, the lingual cusps of maxillary teeth fit into the central fossae of mandibular teeth, facilitating effective food grinding.
  • Functional occlusion describes the contact of teeth during biting and chewing activities.

Tooth Composition and Function

  • The clinical crown is the visible portion of a tooth above the gingiva, while any unerupted part is classified as the clinical root; teeth possess areas known as coronal, cervical, and apical.
  • Tooth anchoring occurs in the alveolar process, with the bony socket called the alveolus.
  • Teeth are categorized as maxillary (upper jaw) or mandibular (lower jaw) based on their anchor points.
  • Key tooth tissues include enamel, dentin, cementum, and dental pulp; the first three are hard tissues, while pulp is soft.
  • Reparative dentin forms rapidly in response to trauma such as fractures or deep decay; tertiary dentin is produced from various traumas affecting primary dentin.

Tooth Functionality

  • Teeth perform three primary functions: cutting, holding, and grinding food, determined by their shape and location.
  • A line angle is formed by the junction of two surfaces, such as the buccal and occlusal surfaces, with names based on the surfaces that meet.
  • A point angle is the meeting point of three surfaces on a tooth.

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