Lecture 2 Flashcards
How many roots do incisors and cuspids have?
1 root
How many roots do pre-molars have?
1 root (except for 1st maxillary pre-molars, which have 2)
How many roots do the molars have?
Maxillary have 3
Mandibular have 2
REMEMBER PRIMARY AND PERMANENT ARE THE SAME
Why does the body sometimes attack dentin?
Dentin looks a lot like bone to the body
What does an osteoclast do?
Dissolve the roots of the baby teeth (i.e. the permanent teeth dissolve the roots of the baby teeth)
–Remember that “C” stands for consume
What does an osteoblast do?
- -Creates bone (B stands for build)
- -Fills in bone behind moving tooth
Which bone is lower in density, maxillary or mandibular?
Maxillary (that is why a mandibular, or lower jaw bone was used in the bible story)
What is the pulpal chamber?
The common area for everything entering through the apex of the roots
What is an abscess?
A tooth which has a bacterial infection inside.
What is almost always indicitive of a failed nerve/tooth?
Spontaneous pain
What is a likely cause for a patient to claim that their tooth is feeling a bit high?
The tooth actually is lifting out of the mouth slightly due to hydraulics from fluid build-up at the base of the tooth
What are the objective symptoms you can check, and what are the associated results you can expect if healthy?
- -Pain with percussion (find a healthy tooth for baseline)
- -No/slow response or no/slow recovery to cold or electricity (3-5 seconds to respond, and about the same time to recover)
What does apical or apically refer to?
The apex of something
How many roots do permanent molars have?
Maxillary have 2 roots facial and 1 root lingual
Mandibular have 1 root mesial, and 1 root distal
SAME AS PRIMARY DENTITION
Do all roots contain a single canal?
- -NO, MF roots of max molars usually contain 2 root canals (MB1, MB2)
- -Mesial roots of mandibular molars have 2 root canals (MF, ML)
- -However, there are exceptions to all the rules (remember the body doesn’t read the anatomy text book)
Are root canals normally performed on baby teeth?
NO, because baby teeth roots are wider, and have a better vascular supply
What are the 6 steps of Root Canal Treatment (RCT)?
1-Diagnose 2-Access Pulpal Chamber 3-Determine length of canal 4-Clean chemically and mechanically 5-Obturate (fill) with gutta percha and sealer 6-Restore tooth with crown or filling
What is an apicoecotomy?
Removal of the tip of the root to remove all the infected channels (1-3mm)
What does it mean to retrofil?
Procedure of filling the end of the canal. MTA is used to do the retrofil (MTA is concrete, but is very biologically compatible)
What type of exercise is good to increase bone volume and density?
Weight bearing exercise
What is the pulp chamber and how are its surfaces named?
- -The pulp chamber is the expanded area inside the crown
- -The walls are named after the outer tooth surface they are closest too (facial, distal, mesial, etc.)
What is reversible pulpitus?
The condition resulting from pulpal trauma, but not full breakdown of the pulpal tissue
What is the periodontal ligament (PDL)?
The ligament that surrounds the roots and connects them to the bone
When must a root canal treatment (RCT) be performed?
When the tooth contains irreversible pulpitus
