Anatomy of Edentulous Ridges Chapter 3
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Anatomy of Edentulous Ridges Chapter 3

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Questions and Answers

What is the recommended distance for the posterior border of the upper denture from the fovea Palatina?

  • 3 mm posterior
  • 4 mm posterior
  • 2 mm posterior (correct)
  • 1 mm posterior

    • Which part of the soft palate lies adjacent to the hard palate?

  • Distal part
  • Movable part
  • Vibrating part
  • Immovable part (correct)

    • What is the primary function of the buccal frenum in denture design?

  • Control tongue movement
  • Provide a mucosal reflection
  • Prevent denture displacement and ulceration (correct)
  • Facilitate teeth alignment

    • What is the primary function of the posterior palatal seal in denture fitting?

    <p>To aid in the retention by creating a slight compression on soft tissues</p> Signup and view all the answers

    Which of the following describes the role of the labial vestibule in denture design?

    <p>It reflects mucosa from the upper lip to the alveolar process.</p> Signup and view all the answers

    What should be done in denture design to address the maxillary labial frenum?

    <p>Create a v-shaped notch opposite to its position</p> Signup and view all the answers

    What is the significance of post-damming in the function of a maxillary denture?

    <p>It prevents air passage and improves denture retention</p> Signup and view all the answers

    The junction between the immovable and movable parts of the soft palate is known as:

    <p>Vibrating line</p> Signup and view all the answers

    Which of the following is a requirement for an effective posterior palatal seal?

    <p>It should lie on easily displaceable tissues</p> Signup and view all the answers

    What type of curvature of the soft palate is associated with a broad posterior palatal seal area?

    <p>Class 1</p> Signup and view all the answers

    What could be a potential complication at the pterygo-maxillary notch?

    <p>Possible irritation site for the denture</p> Signup and view all the answers

    Which muscle is associated with the buccinator muscle in relation to the buccal vestibule?

    <p>Levator anguli oris</p> Signup and view all the answers

    What does the posterior border of the denture aim to eliminate with regards to the gag reflex?

    <p>By alleviating how much the border is felt by the tongue</p> Signup and view all the answers

    What is the result of a prolonged edentulous state?

    <p>Inflammation of the surrounding tissues</p> Signup and view all the answers

    Which structure serves as a primary stress-bearing area in the maxilla?

    <p>Maxillary tuberosity</p> Signup and view all the answers

    What occurs to the incisive papilla if there is excessive bone resorption?

    <p>It lies on the crest of the ridge</p> Signup and view all the answers

    Why should the median palatine raphe be relieved in denture construction?

    <p>To prevent rocking of the denture and midline fracture</p> Signup and view all the answers

    What is a significant consequence of lack of facial muscle support after tooth loss?

    <p>Chin-nose approximation</p> Signup and view all the answers

    What should be done if the torus palatinus is large?

    <p>Surgical excision may be necessary</p> Signup and view all the answers

    Which of the following is a consequence of resorption of the alveolar supporting bone?

    <p>Deterioration of facial aesthetics</p> Signup and view all the answers

    What role do the palatine rugae play in dental orthotics?

    <p>They affect the pronunciation of 's' sounds</p> Signup and view all the answers

    What anatomical feature indicates a relationship between the mandible and maxilla?

    <p>Mentolabial sulcus</p> Signup and view all the answers

    Which landmark becomes deeper with age and loss of teeth?

    <p>Nasolabial sulcus</p> Signup and view all the answers

    What is the normal shape of the mentolabial sulcus in Angle class I?

    <p>Gentle curvature</p> Signup and view all the answers

    Which extraoral landmark is described as an imaginary line linking the alar of the nose to the tragus?

    <p>Ala-tragus line</p> Signup and view all the answers

    What characterizes the mentolabial sulcus in Angle class II?

    <p>Acute angle</p> Signup and view all the answers

    What anatomical structure is located at the center of the upper lip, typically appearing as a diamond shape?

    <p>Philtrum</p> Signup and view all the answers

    How does the vermillion border change with dental loss?

    <p>It is reduced in size</p> Signup and view all the answers

    Which of the following statements regarding the angle of the mouth is true?

    <p>It is used to define denture contours.</p> Signup and view all the answers

    Study Notes

    Anatomy of Edentulous Ridges

    Extraoral Landmarks

    • Interpupillary Line: Reference for dental midline.
    • Ala-Tragus Line: Guides anterior occlusal plane positioning.
    • Nasolabial Sulcus: Depression from nose to mouth, deepens with age and tooth loss.
    • Modiolus: Point of convergence for facial muscles, important in lip support.
    • Philtrum: Diamond-shaped area in upper lip, flattened with tooth loss.
    • Vermilion Border: Junction of lip skin and mucosa, may reduce size post-tooth loss.
    • Angle of the Mouth: Affects denture design, inflamed during prolonged edentulous states.
    • Mentolabial Sulcus: Indicates mandible-maxilla relationship, shape varies by occlusion class.

    Intraoral Landmarks

    • Residual Alveolar Ridge: Broad, rounded supporting structure for dentures.
    • Maxillary Tuberosity: Stress-bearing area located behind last molar, surgery needed if excessively large.
    • Incisive Papilla: Covers incisive foramen, should be relieved to prevent neural pressure.
    • Median Palatine Raphe: Covers suture line, needs relief to prevent denture rocking.
    • Palatine Rugae: Ridges impacting speech quality, located anteriorly on hard palate.
    • Torus Palatinus: Bony growth that varies in size; may require relief or surgical excision.
    • Fovea Palatina: Small depressions indicating salivary gland ducts, denture border should be posterior to this.
    • Root of Zygoma: Provides vertical support, located above first molars.

    Limiting Structures

    • Labial Frenum: Fold attaching upper lip to ridge, must be relieved to prevent ulceration.
    • Labial Vestibule: Area controlling upper denture flange, provides peripheral seal.
    • Buccal Frenum: Varies in size, requires relief for functional movement.
    • Buccal Vestibule: Related to buccinator muscle, does not displace dentures.
    • Soft Palate: Divided into immovable and movable parts, important for denture seal.

    Posterior Palatal Seal

    • Junction (Vibrating Line): Marks the end of the upper denture, critical for retention.
    • Post-damming: Elevation allowing for tissue-denture contact, aids retention and prevents air/food passage.
    • Effective seal should lie on easily displaceable tissues and touch soft palate during rest and function.

    Changes After Tooth Loss

    • Resorption of alveolar bone alters ridge shape and support.
    • Loss of tooth support leads to facial muscle collapse and chin-nose approximation.

    Angle Classification

    • Class I: Gentle curvature forms obtuse angle.
    • Class II: Retruded mandible creates acute angle in mentolabial sulcus.
    • Class III: Protruded mandible may result in a near 180° angle.

    Clinical Considerations

    • Changes in soft tissue and structure following extraction need careful attention during denture construction.
    • Proper denture design assures functional musculature and prevents post-operative complications.

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    Related Documents

    (1) intraoral & extraoral new template.pdf

    Description

    This quiz covers Chapter 3 on the Anatomy of Edentulous Ridges, focusing on the maxilla and key anatomical landmarks relevant to complete dentures. It examines both extraoral and intraoral landmarks crucial for dental professionals to understand. Test your knowledge and understanding of these foundational concepts in dentistry.

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