Biometric methods of analysis Flashcards
(11 cards)
1
Q
Biometric data of dental arches and occlusion recorded on
A
Plaster models
2
Q
Biometric analysis requires
A
- Evaluation of plaster models in three spatial planes
3
Q
Three planes required for biometric analysis
A
- Transverse plane
- Sagittal plane
- Horizontal plane
4
Q
Transverse plane
A
- Assessment of anterio-posterior discrepencies
- Projected on maxillaty tuberosity -tuberosity plane
5
Q
Sagittal plane
A
- Assessment of transverse discrepensies
- Projected on midsagittal plane of face
- Perpendicular to transverse plane
6
Q
Horizontal plane
A
- Used for vertical discrepancies
- Projected on occlusal surfaces of teeth
- Perpendicular to another planes
7
Q
Identification of Transverse plane on study model
A
- Distal to maxillary tuberosity
- Two points between second premolar and first molar
8
Q
Identification of Sagittal plane on study model
A
- Two reference points in maxillary maxillary and mandibular arches
9
Q
Maxillary Sagittal plane reference points plane on study model
A
- Projections of anterior and posterior nasal spine
- Anterior point-Intersection of palatine raphe and second palatine ruga
- Posterior point-Most posterior point of palatine raphe before bisection or intersection of diagonals connecting palatine fovea
- Marked on impressions in advance- located on hard and soft palate
10
Q
Mandibular Sagittal plane reference points plane on study model
A
-
Anterior point-Projection of mental spine and under lingual frenulum on cast
* Posterior point- Vertical line from maxillary arch midline- Upper model base to lower model base
11
Q
Identification of Horizontal plane on study model
A
- Parallel to occlusal plane
- Reference point marked on occlusal surfaces
