Quiz 1 Flashcards
5 Objectives of access openings
- Remove Caries
- Conserve sound tooth structure
- DEBRIDEMENT – penetrate pulp roof and remove pulp tissue
- Locate all canal orifices
- Establish a straight line access
4 endo access principles
- Outline Form
- Convenience form
- Caries removal
- Toilet of canal
Anterior access outlie
Ovoid
Bicuspid access outline
Maxillary molar
Mandibular molar
Rhomboid
Access Burs
330
Round #2, #4, #6
Diamond burs
Slow Speed round burs
Maxillary Incisor
Access: Rounded triangle (young) ovoid (with age)
Canals: 100% single canal
Root: Tips distally
Mandibular Incisor
Access: Triangular to ovoid
Canals: Two canals (50%) o
Canines
Access: Ovoid
Canals: Maxillary (1 canal)
Mandibular (2 canals - 3-6% of the time)
Roots: Maxillary –> tips distally, apex tilts facially
mandibular –> tips distally
1st Maxillary Premolars
Access: Ovoid
Canals: Two canals (60-80%), Three canals (6%)
Root: curve distally
2nd Maxillary Premolar
Access: Ovoid
Canals: One canal (80-90%), two canals
Root: curve distally, 1 root (80%)
1st Mandibular Premolar
Access: Ovoid
Canals: One canal (75%) Two canals (25%) Three canals (1%)
Roots: Tips distally and lingually
2nd Mandibular Premolar
Access: Ovoid
Canals: One canal (85%) Two canals (15%)
Roots: curves distally
Maxillary 1st Molar
Access: Triangular
Canals: (Three roots, 4 canals)
* Palatal - one canal (100%)
*Distobuccal – one canal (100%)
* Mesiobuccal – two canals (20 - 80%)
Maxillary 2nd molar
Acces: Triangular
Canals:
Roots:
Mandibular 1st molar
Access: Rhomboid
Canals: 3-4 canals (Mesial Root: 2 canals, Distal Root: 2 canals)
Roots: 2 roots
Distal root curves mesially
Mesial root curves distally
Radix Entomolaris
3rd root in mandibular 1st molars
Seen more in asian populations
x-rays look normal but faint
Mandibular 2nd molar
Access: Rhomboid
Canals: 3-4 canals (2 canals in mesial root, 1 or 2(6%) canals in distal root)
Roots: 2 roots
Contain 2 or more roots…
- Mandibular teeth
- Mesiobuccal root of maxillary incisors
- Maxillary 1st premolar
One canal almost always…. (3)
- Maxillary Anterior
- Maxillary 2nd premolars
- Palatal and distobuccal roots of maxillary incisors
Canal Paths
- Merge: mandibular incisors
- Divide – dilacerate
- Curve
- Recurve (S shaped)