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DHA > Prosthodontics > Flashcards

Prosthodontics Flashcards

1
Q

Which muscle makes the labial frenum in the mandible?

A

Orbicularis oris

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2
Q

What is the posterior border of the maxillary buccal vestibule?

A

Hamular notch

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3
Q

What is the hamular notch?

A

It is a notch/fissure formed at the junction of the maxilla and the hamular process of the sphenoid bone

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4
Q

What are the lateral extents of the vibrating line?

A

It runs from hamular notch to hamular notch

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5
Q

How do you discover the vibrating line?

A

By asking the patient to say “ah”

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6
Q

What is the vibrating line 2mm away from?

A

Fovea palatini

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7
Q

What is the “butterfly line”?

A

The clear demarcation of the soft and hard palate, and the vibrating line is just behind it

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8
Q

How do you locate the butterfly line?

A

Valsalva maneuver

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9
Q

How do you perform the valsalva maneuver?

A

Hold your nose and gently try to push air through the nose. This balloons the soft palate down.

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10
Q

What do the butterfly line and vibrating line together form?

A

The posterior palatal seal area

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11
Q

Where is the posterior palatal seal area of the denture located?

A

Between the butterfly line and the vibrating line

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12
Q

What is the function of the posterior palatal seal area of the denture?

A

To approximate with the soft palate to create a tight vacuum-like seal to prevent displacement of the denture

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13
Q

What do you do to the master cast in the posterior palatal seal area?

A

You carve it a bit more around the vibrating line, to create a larger area for the denture to compress the soft palate

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14
Q

Why is the coronoid notch relevant in Complete Denture creation in the maxilla?

A

It marks the distobuccal area of the custom tray impression during maxilla denture making.

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15
Q

How do you record the border moulding at the coronoid notch area of a maxillary denture?

A

You ask the patient to do lateral excursives (move mandible left and right) so that the anterior portion of the coronoid process contours the distobuccal flange of the custom tray

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16
Q

What is the pterygomandibular raphe?

A

It’s a band of fibrous tissue that connects the buccinator anteriorly to the superior pharyngeal constrictor posteriorly

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17
Q

How is the pterygomandibular raphe relevant to maxillary dentures?

A

When you ask the patient to open their mouth wide, the pterygomandibular raphe moves forward and marks the impression material in the very back of the denture.

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18
Q

Which one is more broad - maxillary or mandibular edentulous arch?

A

Maxilla

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19
Q

Which muscle attaches in the maxillary labial frenum?

A

None

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20
Q

Which muscles attach in the mandibular buccal frenums?

A

Orbicularis oris and buccinator

21
Q

Which muscles attach in the maxillary buccal frenums?

A

Orbicularis oris and buccinator

22
Q

Which muscle attaches into the lingual frenum?

A

Genioglossus

23
Q

Which muscle forms the inferior border of the mandibular labial vestibule?

A

Mentalis

24
Q

Which muscle forms the inferior border of the mandibular buccal vestibule?

A

Buccinator

25
Q

Why do I need to know about the muscles that form the vestibules?

A

Because their attachment will determine the extent of the flanges of the mandibular denture

26
Q

Which muscle attachments are contained within the retromolar pad?

A
  • temporalis
  • buccinator
  • superior pharyngeal constrictor
  • pterygomandibular raphe
27
Q

Do you cover the retromolar pad with the denture?

A

Yes - because the integrity of the bone is maintained in the area

28
Q

What is the masseteric notch?

A

It’s the distobuccal area on the mandibular impression or denture

29
Q

How do you record the masseteric notch?

A

Make the masseter contract by closing the mouth against resistance

30
Q

What is the area between the mandibular alveolar ridge and tongue called?

A

Alveololingual sulcus

31
Q

How many regions does the alveololingual sulcus have and what are they called?

A

3: Anterior, middle and posterior regions

32
Q

What is the extent of the anterior region of the alveololingual sulcus?

A

Lingual frenum to premylohyoid fossa

33
Q

Which gland sits in the anterior region of the alveololingual sulcus?

A

Sublingual gland

34
Q

Is the lingual flange of the lower denture short or long in the anterior region?

A

Short. Because it has to sit above the mylohyoid muscle and not impinge on the sublingual gland

35
Q

What are the extents of the middle region of the alveololingual sulcus?

A

From premylohyoid fossa to distal end of mylohyoid ridge (from the beginning to end of mylohyoid line)

36
Q

What does “mylo” in mylohyoid stand for?

A

Molars

37
Q

What function is the mylohyoid muscle responsible for?

A

Elevating the hyoid bone and tongue during swallowing and speaking

38
Q

How is the flange of the mandibular denture affected in the middle region of the alveololingual sulcus?

A

The flange is deflected medially - due to the presence of the mylohyoid ridge laterally and the contraction of the mylohyoid medially.

39
Q

What is the extent of the posterior region of the alveololingual sulcus?

A

It extends from the end of the mylohyoid line into the retromylohyoid fossa

40
Q

Are mylohyoid attachments on the mandible higher posteriorly or anteriorly?

A

Posteriorly

41
Q

How are attachments of the mylohyoid fibers different when comparing anterior to posterior attachments?

A

Anterior attachments are more horizontal, posterior attachments are more vertical

42
Q

How is it possible for the lingual flange to be longer in the posterior area of the alveololingual sulcus when the mylohyoid insertions are higher on the ridge?

A

Because the mylohyoid fibres are more vertically oriented in the posterior region

43
Q

What limits the extension of the lower denture in the distolingual area?

A

Palatoglossus and superior constrictor muscles

44
Q

What causes a sore throat in denture patients?

A

Overextension of the lower denture in the distolingual area - impinging on the palatoglossus and superior constrictor muscles

45
Q

Where is the buccal shelf located?

A

Just lateral to the posterior mandibular alveolar ridge

46
Q

What is the function of the buccal shelf wrt dentures?

A

It’s a flat landing area and provides support for the mandibular denture

47
Q

Why is the buccal shelf used to support mandibular dentures?

A

It lies flat and perpendicular to occlusal forces and hence helps resist occlusal forces

48
Q

Does the buccal shelf have any muscle attachments?

A

Yes - the buccinator

49
Q

Does the buccal shelf coincide with a vestibule?

A

Yes - the buccal vestibule

DHA (1 decks)

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