Incisors Flashcards
Maxillary Incisors (#)
8,9
7,10
Eruption Dates - #8 / #9
Age 7-8
Eruption Dates - #7 / #10
Age 8-9
Root Completion - #8 / #9
Age 10
Root Completion - #7 / #10
Age 11
Antagonists - #8 / #9
26/25
24/23
Antagonists - #7 / #10
27/26
22/23
Avulsion
Complete displacement of tooth from socket/alveolus
Diastema
Open contact between central incisors
Supernumerary
[mesiodens]
Extra tooth between 8/9
Mandibular Incisors (#)
24/25
23/26
Eruption Dates - #24/25
Age 6-7
Eruption Dates - #23/26
Age 7-8
Root Completion - #24/25
Age 9
Root Completion - #23/26
Age 10
Antagonists- #24/25
9
8
Antagonists- #23/26
9/10
8/7
Mamelons
Rounded enamel extension of incisal ridge on newly erupted teeth, worn down over time/attrition
Microdontia
[peg lateral]
Abnormally small maxillary lateral incisors
Talon Cusp
Claw shaped extra cusp on lingual
Risk of pulp horn exposure
(maxillary incisors)
Hutchinson incisors
Screwdriver shaped crown
Due to congenital syphilis [treponema pallidum]
(maxillary incisors)
Dens in dente
Deep lingual pit
May lead to pulpal exposure
(maxillary incisors)
4 Developmental Lobes
Mesiolabial
Middle labial
Distolabial
Lingual
Cingulum
Raised, rounded area on cervical 3rd of lingual
Marginal Ridge
Lingual mesial/distal border ridges
Fossa(e)
Shallow, wide lingual depression
Developmental Groove
Sharp,deep,V-shaped lingual linear depression; marks junction of developmental lobes
Supplemental Groove
Shallower, irregular branch from developmental groove
Features: Central Maxillary Incisors
Largest, widest crown, most prominent, Imbrication lines
Round root, No concavities
Distinguish R from L: Incisors
mesioincisal angle is sharp, distoincisal is more round.
CEJ greater curvature on mesial
Features: Maxillary Lateral Incisors
Greatest degree of crown variation, root sharp/curves distal, Distolingual marginal groove-makes tooth more prone to perio disease, Lingual Pit more common
Linguogingival groove
Separates cingulum from lingual fossae - Max lateral incisors
Anadontia
Absence of a single tooth or multiple teeth, congenitally missing
Most common in Max Lateral Incisors
Distolingual marginal groove
Extends to root - makes periodontial disease common
Max Lat Incisors
Features: Mandibular Central Incisor
One antagonists, smallest/simplest, root concavities, centered cingulum
Mesial/Distal contact: incisal 3rd
Features: mandibular Lateral Incisors
Mesial/Distal contact: incisal 3rd
Appears twisted distally, bigger than centrals. Root concavities
