Lecture 2: Terminology and Chronology Flashcards
Universal Numbering System
1-32
1= Right Maxillary 3rd molar
32= Right Mandibular 3rd molar
Palmer Notation System
UTILIZES quadrants and symbols for identifying teeth.
FDI System of Numbering
Breaks into four quadrants and lists through 1-8
1 being central incisors and 8 being third molars
Anterior Teeth
6-11 Maxillary right Canine through Maxillary left canine
22-27 Mandibular right canine through mandibular left canine.
What are the numbers for the Central incisors?
Maxillary: Teeth #8 and #9
Mandibular: Teeth #24 and #25
What are the numbers for the lateral incisors?
Teeth #7, 10 (max)
Teeth #23, 26 (mand)
What are the numbers of the Canines?
Teeth #6, 11 (max)
Teeth #22, 27 (mand)
What constitutes the POSTERIOR teeth?
the pre-molars and the molars
What are the numbers for the premolars?
Teeth #4, 5, 12, 13 (max)
Teeth #20, 21, 28, 29 (mand)
What are the numbers for the Molars?
• Teeth #1, 2, 3, 14, 15, 16 (max) • Teeth #17, 18, 19, 30, 31, 32
(mand)
How does naming primary teeth differ from deciduous teeth when using the Universal System of Notation?
Primary teeth are identified (A-T)
A= Right Maxillary 2nd molar
T= Right Mandibular 2 Molar
IN VIVO
looking or taking place in a living organism
Vermilion Zone
The red zone of the lips.
Vermillion Border
sharp junction
of the red zone and skin
Nasolabial groove
demarcates
lip and cheek
Philtrum of lip
middle of upper
lip
Angle/Corner of the
mouth/Commissure
the corners of the lips
Labiomental groove
between the lower lip and the chin. (see a picture)
Using a picture Draw the following structures on the face
Vermilion Zone Vermilion Border Nasolabial groove Philtrum of lip Angle/Corner of the mouth/Commissure
Labiomental groove
What part of the mouth is the oral Vestibule
Slit like space between teeth and lips/cheeks
Labial/Buccal Frena:
attachments of the lips
and cheeks to the
alveolus (bony area
surrounding the teeth)
What structures lie on the hard palate. Using a picture, please identify each
Incisive Papilla
Rugae
Midline Palatine Raphe
How much of the roof of the mouth does the hard palate occupy?
2/3
Houw much of the roof of the mouth does the soft palate occupy?
1/3
What structure hangs off the soft palate?
Uvula
What structures comprise the orpharynx
Tonsils Anterior (palatoglossal arch) & Posterior (palatopharyngeal arch) Pillars of the Fauces
mylohyoid muscle
The paired muscles that form the floor of the mouth.
This muscles runs from the mandible to the hyoid bone and forming the floor of the oral cavity of the mouth. It is named after its two attachments near the molar teeth (“mylo” comes from the Greek word for “molar”). These muscles are mesodermal in embryologic origin.
Sublingual folds: Find in the drawing
Raised folds where
submandibular salivary
ducts open
Lingual Frenum: Find in drawing
The lingual frenum is a fold of mucous membrane connecting the ventral tongue to the floor of the mouth. In general, lingual frenum serves multiple roles; its main function is to support the tongue and aid in limiting its movement in different directions.
Structures in the Cheek and Retromolar Region:
Buccal Mucosa
Retromolar Pad
Buccal Mucosa
Buccal mucosa is the lining of the cheeks and the back of the lips, inside where they touch the teeth
retromolar pad
The retromolar pad is a mass of soft tissue located at the posterior end of the mandibular alveolar ridge. This pad covers the underlying bone with surrounding attached muscle fibers.
Why is the chronology of Development important?
Assess the patient’s DENTAL AGE: Is the patient developing normally?
Important for procedures like: endodontic therapy, and whether or not to extract a tooth.
Forensics and Medications`
First sign of tooth development is at:
6-7 weeks in utero
Deciduous teeth begin to calcify at:
13-20 weeks in utero
When do ALL DECIDUOUS teeth begin to calcify?
18-20 weeks in utero
When do the deciduous teeth begin to erupt?
6-30 months after birth.
Eruption:
emergence into the
oral cavity
Exfoliation:
loss of the deciduous
tooth
Know the Composition of the Deciduous teeth:
- 2 central incisors in each arch
- 2 lateral incisors in each arch
- 2 canines in each arch
- 2 first molars in each arch
- 2 second molars in each arch
The deciduous dentition excludes what type of teeth?
premolars
Deciduous Eruption: Mandibular central incisors
6-8 months
Deciduous Eruption: Maxillary central incisors
10 months
Deciduous Eruption: Maxillary lateral incisors
11 months
Deciduous Eruption: Mandibular lateral incisors
13 months
Deciduous Eruption: Maxillary first molar
16 months (first)
Deciduous Eruption: Mandibular first molar
16 months (later)
Deciduous Eruption: Maxillary canine
19 months
Deciduous Eruption: Mandibular canine
20 months
Deciduous Eruption: Mandibular second molar
27 months
Deciduous Eruption: Maxillary second molar
29 months
Time frame when all deciduous teeth erupt (Normal)
6-30 months
Deciduous Eruption Pattern
Incisors –>
First molars–>
Canines–>
Second molars
When have all deciduous teeth begun to calcify?
18-20 weeks in utero
When do primary teeth begin to erupt?
6 months after birth
When have all primary teeth erupted?
approximately 30 months
How long does the deciduous dentition last?
until the first permanent tooth begins to erupt.
APPROXIMATELY 6 years
Deciduous dentition:
only deciduous teeth present (up to 6 years of age)
Mixed Dentition:
mixture of deciduous
and permanent teeth present
Permanent Dentition:
only permanent teeth present
Composition of Permanent Dentition:
- 2 central incisors per arch
- 2 lateral incisors per arch
- 2 canines per arch
- 2 first premolars per arch
- 2 second premolars per arch
- 2 first molars per arch
- 2 second molars per arch
- 2 third molars per arch
Succedaneous teeth:
permanent teeth that
replace deciduous teeth
Non-succedaneous teeth:
permanent teeth
that do not replace deciduous teeth
What teeth are classified as Non-succedaneous teeth
Molars
Eruption of Permanent Teeth: Mandibular first molars
6 years (first)
Eruption of Permanent Teeth: Maxillary first molars
6 years later
Both non-succedaneous teeth!
Eruption of Permanent Teeth: Mandibular central incisor
6-7 years
Eruption of Permanent Teeth: Mandibular lateral incisor
7-8 years
Eruption of Permanent Teeth: Maxillary central incisor
7-8 YEARS
Eruption of Permanent Teeth: Maxillary lateral incisor
8-9 years
Eruption of Permanent Teeth: Mandibular canine
9-10 years
Eruption of Permanent Teeth: Maxillary first premolar
10-11 years
Eruption of Permanent Teeth: Mandibular first premolar
10-11 years
Eruption of Permanent Teeth: Maxillary second premolar
10-11 years
Eruption of Permanent Teeth: Mandibular second premolar
10-12 years
Eruption of Permanent Teeth: Maxillary canine
11-12 years
Eruption of Permanent Teeth: Mandibular second molar
11-13 years
Eruption of Permanent Teeth: Maxillary second molar
12-13 years
Eruption of Permanent Teeth: Mandibular third molar
17+ years
Eruption of Permanent Teeth: Maxillary third molar
17+ years
Time frame for root development of permanent teeth
2-3 years after the eruption of teeth
Time frame for Calcification of crown of teeth to be completed
1/2 time of eruption and
add 1 year
KNOW: when calcification of each of the
teeth begins
1/2 time of eruption and
add 1 year
First part of the tooth to calcify is………
the crown
Important Study Information:
sequence of eruptions and general time frames of eruption.
