Quiz 2 Flashcards
Primary Dentition
Baby teeth 20 teeth 4 2nd molars 4 1st molars 4 cuspids(canine) 4 lateral incisors 4 central incisiors
Primary Dentition Timeline
Arrive 6 months (P+O)
Age 3, all 20 teeth
First begin losing at age 5 1/2
Mixed Dentition
Combo of adult and baby teeth
Happens at age 6, ends at 12
Permanent Teeth
Adults set 32 teeth 4 3rd molars (wisdom) 4 2nd molars (12 year) 4 1st molars (6 year) 4 2nd bicuspids 4 1st bicuspids 4 lateral incisors 4 central incisors
When do the last teeth erupt?
18-25 years old.
Primary Dentition Start
Eruption of primary mandibular central incisor
Mixed Dentition Start
Eruption of permanent mandibular first molar
Permanent Dentition Start
Shedding of last primary tooth
Alveolar Process
Bone mat that holds teeth in
Alveolus
Tooth sockets
Incisal
Bottom end of anterior teeth (cutting teeth)
Mesial
Side of tooth toward the midline
Distal
Furthest away from the midline
Palatal
Backside closest to root of mouth
Lingual
Inside of mouth
Occlusal
Table top portion where you chew and grind
Don’t have on anterior teeth
Proximal
Mesial and distal surface between adjacent teeth
Mesial of one tooth touching distal of another
Only area where two mesial surfaces are touching
8 and 9
24 and 25
Facial/Buccal/Labial
Sides of tooth where lips touch
Embrasures
Triangles formed by sloping away of mesial and distal surfaces. may diverge:
Facially, Lingually, Occlusally, or apically w/ loss of tissue
Height of Contour
Widest part of tooth
Teeth wider at top than bottom
Contact
Keep food from being wedged in
Where most people get cavities
Line Angles: Anterior (Corner of tooth)
Distolabial Distolingular Mesiolingual Mesiolabial Labioincisal Linguoincisial
Root Thirds
Apex: Tip of tooth
Apical: root 3rd
Middle 3rd
Cervical: Neck of tooth 3rd
Crown Thirds
Cervical: Neck
Middle 3rd
Incisal: Tooth edge
Anterior Teeth consist of:
6 Teeth per arch
4 Maxillary Incisiors (central,lateral)
2 canine/cuspid
4 Mandibular Incisors (Central, Lateral)
Lobe Development
Tooth enamel develops in lobes
Newly Erupted Permanent Incisors
Mamelons- lumps on end Imbrication Lines: Horizontal, Developmental lines Incisal edge and angles Height of contour: Cervical 3rd Mesial Contact: Incisal 3rd
Lingual Surface Features
Cingulum Mesial Marginal Ridge Distal Marginal Ridge Height of contour: Cervical 3rd Mesial Contact: Incisal 3rd
Additional Lingual Surface Features
Some have developmental pit/supplemental pit, which is prone to decay
Fossa/Wide depression
Characteristics of Permanent Incisors
Incisal edge and angles Height of contour: cervical 3rd Mesial contact: incisal 3rd Shaper MI angle, Rounder DI angle, more pronounces CEJ curve Single-rooted
Maxillary Central Incisors
Widest crown MD Greatest CEJ curve Distal offset cingulum Shallow lingual fossa Marginal ridges Distal contact: Junction of incisal and middle 3rds Overall conical root shape No proximal root concavities Rounded root apex
Pulp
Where the nerves are
Characteristics of Maxillary Lateral Incisors
Greatest Crown variation
Smaller than maxillary center, but similar
Prominent lingual surface
Centered cingulum
Pronounced marginal ridges
Root curves distally w/ sharp apex
Same/longer root than center, thinner though
Characteristics of Mandibular Central Incisors
Smallest/Simplest Bilaterally symmetrical Small centered cingulum Subtle lingual fossa Equal, subtle marginal ridges Distal contact: incisal 3rd Root longer than crown Proxmial root concavities give double rooted look
Characteristics of Mandibular Lateral Incisors
Larger than central mand. Not bilaterally symmetrical Appears twisted distally Small, distal cingulum Lingual fossa Moderate mesial marginal ridge longer than distal Distal contact: incisal 3rd
Characteristics of Permanent Canines
Single cusp, w/ tip and slopes Labial, marginal and lingual ridges Cingulum and lingual fossa Longest tooth in each dentition Height of contour: labial cervical 3rd, lingual middle 3rd Shorter mesial cusp slope More cervical contact on distal More pronounces mesial CEJ curve Long, thick single root Proximal root concaviites
Characteristics of Maxillary Canines
Sharp cusp tip Prominent lingual crown Mesial contact: junction of incisal and middle 3rds Distal contact: middle 3rd Shorter distal outline on labial Depresssion b/w distal contact and CEJ Blunt root apex
Characteristics of Mandibular Canines
Smoother lingual
Less sharp cusp tip
Mesical contact: incisal 3rd
Distal contact: Junction of incisal and middle 3rd
Shorter and rounder distal outline on labial
Shorter mesial slope than distal
Developmental depression on M and D of root (double root appearance)
Pointed root apex
Hutchinson’s Disease
Incisors aren’t fully developed
