10. Trial placement Flashcards
Trial placement: What do we set articulator specifics at? (3)
- PCPI at 45*
- Bennet Angle at 15*
- Incisal pin at 0 mm
Trial placement: record bases w/denture teeth? (2)
- Maximal intercuspation at centric relation.
- Record base thickness of no more than 2 mm.
Trial placement: waxed external surface?
Sometimes waxing can be postponed
Trial placement: What do we check for? (4)
- retention of record base
- comfort (no pain/pressure/discomfort)
- esthetics
- occlusion
Trial placement: What do we check in the articulator? (5)
- Overjet.
- Overbite.
- Centric relation.
- Maximal intercuspation.
- Balanced articulation.
Trial placement: stages? (4)
- Record base assessment
- Esthetic assessment
- Phonetic assessment
- Functonal assessment
Trial placement record base assessment? (4)
- Retention, support and stability.
- Adequacy of baseplate limits.
- Border seal.
- Postdam line
Trial placement record base : Postdam line assessment? (3)
- Groove at the back part of the upper cast of 1-1.5
mm depth. - Thicker border at the back of the denture.
- Not recommended.
Trial placement: what do we assess esthetically?
- tooth esthetics
- nasolabial furrow
- cheek support
- lip support
Trial placement esthetics: what do we asses for lip support? (3)
- Visible lip vermilion.
- Not so straight or inwards.
- Not so protruded.
Trial placement esthetics: what do we asses for the nasolabial furrow?
- Disappears or decreases
Trial placement esthetics: what do we asses for the cheek support?
Cheeks don’t collapse inward
Trial placement esthetics: what do we asses for the tooth esthetic? (6)
- 1-2 mm visible when mouth slightly open
- Symmetrical midline
- Line of incisal edges is parallel to interpupilary line or upper lip.
- Shape and size match face.
- Canines are at ala of the nose.
- While smiling no “gum” is visible.
Trial placement esthetics: what do we do if it is incorrect? (2)
- rearrange front teeth ourselves
- remove upper front teeth and replace with occlusion rim
Trial placement incorrect esthetics: why/how do we rearrange the front teeth? (3)
◦ If size and shape is correct.
◦ Heat wax with a wax knife. ◦ Check directly in patient’s mouth.
Trial placement incorrect esthetics: procedure removing U front teeth and replace with an occlusal rim? (3)
◦ Mark midline, smile line and canine lines again
Trial placement esthetics: record bases and waxing restore…(2)
bone and gingival structure
Trial placement esthetics: denture teeth restore….
patient’s esthetics according to age, sex, face, etc
Trial placement phonetics: what do we need for proper phonetics? adequate.. (4)
- baseplate thickness
- upper baseplate extension
- incisor location
- interocclusal rest space
Trial placement phonetics: Baseplate extension is important for which sounds? (3)
- K
- G
- A
Trial placement phonetics: incisor location is important for which types of sounds?
- bilabial
- dentolingual
- dentolabial
What is a bilabial sound? (4)
- B
- M
- P
- depends on incisor location
What is a dentolingual sound? (6)
- depends on incisor location
- C
- D
- N
- T
- Z
What is a dentolabial sound? (3)
- depends on incisor location
- F
- V
Trial placement phonetics: interocclusal rest space is important for which types of sounds? (2)
- S
- M
Trial placement functionality: what is assessed? (2)
- VD
- occlusion
Trial placement funcionality: how do we assess VD? (4)
- Tire patient’s masticatory muscles for 2 min.
- Measure interocclusal rest space.
- Insert trial dentures.
- Check that interocclusal rest space remains the same.
Trial placement funcionality: how do we assess occlusion? (2)
- Check maximal intercuspation with gentle biting force.
- Check balanced articulation in the same way.
Trial placement funcionality: What do we do if VD or occlusion are wrong? (3)
- Remove lower posterior teeth.
- Build an occlusion rim for them.
- Remake VD adjustment and intermaxillary record
