Tooth anatomy Flashcards
Label A-G
A - enamel
B - dentine
C - pulp cavity
D - neck
E - periodontal ligament
F - apical foramen
G - cement
Name the periodontal structures:
A - enamel
B - gingival sulcus
C - gingiva
D - alveolar bone
E - periodontal ligament
F - cement
What is the most complete dental arrangement?
3-1-4-3
3-1-4-3
Describe the properties of the different parts of the tooth
Enamel - highly calcified, hard, acellular
Dentine - calcified, collagen rich matrix, contains ondontoblasts
Cement - similar to bone
Pulp cavity - contains pulp, follows external form of tooth
Pulp - delicate CT, highly vascular, lymphatic plexus
Apical foramen - exit point for nerves and vessels
What are ondontoblasts?
- Form dentine by depositing organic dentine which calcifies
- Differentiate as a single layer columnar cells
- Form ondontoblastic processes (slender cytoplasmic extension within fine dentine tubule)
What is the normal depth of the gingivae in the dog?
< 3mm
What is the normal depth of the gingivae in cats?
< 0.5mm
State 5 features of teeth sockets
- aka alveolus
- Separate alveolus for each tooth
- Lie in trabecular bone
- Lined with thin layer of dense bone, lamina dura
- Takes shape of root of tooth
Describe the nervous supply to the teeth
Mandibular - inferior alveolar nerve (branch of mandibular nerve V)
Maxilla - infraorbital nerve (branch of maxillary nerve V)
Describe the vascular supply to the teeth
Mandibular - inferior alveolar artery
Maxillar - branch of maxillary artery
What is meant by ‘heterodont’?
An animal that possesses more than one tooth morphology
What is meant by ‘diphyodont’ and what does it allow?
An animal with 2 successive sets of teeth; a deciduous set and permanent set.
Adaptation to larger, more powerful adult jaws.
Describe the steps in eruption of permanent teeth
- Permanent tooth rises into alveolus of temporary tooth
- Causes pressure erosion of root of temporary tooth
- Temporary tooth loosens and falls out
- Permanent tooth grows into vacated space
