W3 Morphology Flashcards
What are the features of Maxillary Central Deciduous Incisor and FDI notation?
Notation 51,61, A
- Rounded disto-incisal angle
- Large palatal cingulum and pronounced bulge on labial surface
- Single root is blunt and tapers
What are the features of Maxillary Lateral Deciduous Incisor and FDI notation?
52,62 B
- Palatal cingulum less pronounced
- Inciso-cervical dimentsion larger than mesio-distal
- Rounded disto-incisal angle, sharp mesio-incisal angle
- Single root
What are the features of the Maxillary Deciduous Canine and FDI notation?
53,63 C
- Defined palatal cingulum with defined mesial and distal marginal ridges
- 2 lingual fossa divided by lingual ridge
- Mesial slope is longer than distal slope
- Single root has a slender taper and tends to distall incline
What are the features of the Mandibular Central Deciduous Incisor and FDI notation?
17,81 A
- Smallest tooth in the deciduous dentition
- Buldge on labial surface at cemento-enamel junction
- Cervical margin most sinuous (curves) on mesial side
- Single tapered root , tends to incline distally
- Can have mammelons
What are the features of the Mandibular Lateral Deciduous Incisor and FDI notation?
72,82 B
- Incisive edge slopes downwards from mesial to slightly lower distal surface
- Lingual surface may be more concave than that of Mandibular central deciduous incisor
- Single tapered root, rounded when in cross sectionk inclines distally
What are the features of the Mandibular Deciduous Canine and FDI notation?
73,83 C
- Less well-define labial and lingual longitudinal ridges, lingual ridge and often completely absent
- Distal slope is longer than mesial
- Cervical margin for curvey on mesial side
- Singular root
What are the features of the Maxillary First Deciduous Molar and FDI notation?
54,64, D
- From occlusal aspect, the crown is seen as divided into buccal and lingual halves by a deep central developmental fissure (1 groove)
- This developmental fissure runs mesiodistally, conntecting the mesial, central and distal pits (3 pits)
- Maxillary first meciduous molar has 4 cusps: mesiobuccal, distobuccal, mesiopalatal and distopalatal
- 3 roots widely divergent (palatal longest)
- Pronounced bulge on mesial side of buccal surface: molar tubercle of Zuckerandl
What are the features of the Maxillary Second Deciduous Molar and FDI notation?
55,65, E
- Crown has 4 cusps, the mesiopalatal being the most prominent which is jointed to the distobuccal cusp by an oblique ridge
- 3 pits (mesial, central and distal)
- Cusp of Carabelli present and located on mesio-palatal cusp
- 3 roots (palatal largest)
- Lingual and buccal developmental groove
What are the features of the Mandibular First Deciduous Molar and FDI notation?
74,84 D
- The lingually inclined occlusal surface comprimes 4 cusps; two prominent buccal cusps and two smaller lingual cusps
- Molar tubercle of Zuckerandl an exaggerated cervial buldge on the buccal surface.
- Transverse ridge dividing occlusal into 2 fossa
- 3 pits
- 2 roots
What are the features of the Mandibular Second Deciduous Molar and FDI notation?
75,85, E
- From the occlusal aspect 5 cusps can be seen; 3 buccal and 2 lingual
- Prominent cervical bulge on buccal surface of crown. Buccal surface inclinded lingually
- Two buccal developmental grooves
- 2 roots, mesial root longer
Are their premolars in the primary dentition?
No
When deciduous molars exfoliate what are they replaced by?
Permanent premolars
What are the feature of the Maxillary Central Incisors and FDI notation?
11.21
- Palatal Aspect has a central depression consisting of:
- Lingual fossa
- Mesial marginal ridge
- Distal marginal ridge
- 1 tapering root
- Pronounced cingulum
What are the features of the Maxillary Lateral Incisor and FDI notation?
12,22
- The lingual surface has two pronounced marginal ridges. (sometimes the ridges can meet leading to a pit or fossa)
- Cervical undulation is greater on mesial surface
- One tapering root, flatter root than central
What are the features of the Maxillary Pemanent Canine and FDI notation?
13,23
- Labial surface has a mesial and distal slope, distal slope is longer than mesial ( vs deciduous cainine mesial is longer)
- Mesial and distal marginal ridge
- Mesial and distal fossa, distal is deeper
- Lingual ridge seperates these two
- Single root
What are the features of the Mandibular Central Incisor and FDI notation?
31,41
- First permanent teeth to erupt, narrowest of all incisors
- Less prominent marginal ridges, fossa and cingulum compared to maxillary central incisor
- Almost identical from lingual aspect
- Singular root
What are the features of the Mandibular Lateral Incisor and FDI notation?
32,42
- Wider than mandibular central
- Lack of bilateral symmetry
- Disto-incisal angle rounded
What are the features of the Mandibular Permanent Canine and FDI notation?
33,43
- Single cusp
- Distal slope longer
- Marginal ridges and cingulum is less pronounced then upper
- Two lingual fossa, distal being greater of the two
- Single root
What are the features of the Maxillary First Premolar and FDI notation?
14,24
- Crown has two cusps
- First premolar has two roots, one buccal and one lingual
- Two root canals and two pulp horns
- Mesial slope is longer than distal slope
What are the features of the Maxillary Second Premolar and FDI notation?
15,25
- Two cusps - buccal and palatal orientation
- Less defined vs first premolar
- Replaces the 2nd deciduous molar
- Distal slope longer
- Well developed mesial marginal ridge
- No fossa present, more supplementary grooves
- Single root
What are the features of the Mandibular First Premolar and FDI notation?
35,45
- Two cusps; buccal and lingual orientation
- Mesial and distal marginal ridges
- Distal and mesial fossa and pits
- Transverse ridge-extends from buccal cusp tip to lingual cusp tip
- Single root
