Dental anatomy

Anterior Tooth, name the Cusp surfaces and angle names?

Mesial Cusp Ridge
Distal Cusp Ridge
Incisal Edge
Crown Cusp tip
Root Tip
Root

Class II Tooth decay?

Class II Decay:

At The Occlusal, Distal, Mesial, buccal, or Lingual Surface of a tooth.

Considering General Features, mandibular canines are \_________ (smaller or larger) than the Maxillary canines.

Smaller

Considering the two sets of human Dentition, which of the following will be used to identify the dentition during childhood?

Primary Dentition

Do Primary teeth have Mamelons?

NO, Only a newly erupted tooth in the permanent dentition. The Mamelons wear away with Mastication or Bruxism.

Does Primary dentition have Premolars?

No, the Premolars take the place of the 1st and 2nd deciduous Molar.

How is a tooth Crown, And roots Sectioned into?

They are divided into Thirds; (Occlusal, Buccal, Lingual, Distal, Mesial Etc...,)
i.e., Anterior teeth: Mesial third, Middle Third, Distal Third

How Many developmental Lobes does each tooth have?

(Lobes come together to from a tooth).

Anterior teeth: Three Facial One Lingual (4)

Premolars: Three Facial one Lobe per Lingual Cusp (4 to 5)

Molars: One Lobe per Major Cusp (4 to 5)

How many pulp Horns does a tooth have?

One per Cusp.

How Many Root Canals does a Maxillary 2nd Premolar Have?

It has one root.

How Many Root Canals does a Maxillary Fist premolar have?

If its Bifurcated at the apex, It Has One Roots two canals, Two Cusp, Two Pulp Horns.

How many roots do Mandibular 1st and 2nd Premolars

Lower Pre molars have 1 root and one root canal

How many roots in Mandibular Molars?

Mandibular molars have Two Roots,

One root canal in the Distal root and Two Root Canals in the Mesial Root.

How Many roots may a maxillary central Incisor have?

One root,
One Canal.

How Many roots may Maxillary First and 2nd Molars Have?

1. They Have 3 to 4 roots.
2. On each Molar The Distal and Lingual Palatal roots only have One root canal, While the Mesial root has Two Root canals.

How many teeth in the permanent dentition?

32 (16 on each arch, 8 on each Quadrant).

How many teeth in the primary dentition?

20 (10 on each arch, 5 on each quadrant).

How many Triangular and transverse ridges are there in Mandibular Molars?

There are Four Triangular Ridges, and Make up Two Transverse Ridges.

Exception The Mandibular First Molar with 3 Buccal Cusp.

Ideally How Many roots and canals will a Maxillary First Premolar Have?

Two Roots, Two Canals

Ideally you expect to find Mandibular first and second molars with?
a) Two roots three canals
b) Six roots three canals
c) no roots one canal

Two Roots
Three Canals (one on the D, Two On the M)

Identify the following Posterior tooth, Occlusal surfaces?

Mesial
Buccal
Lingual
Distal
Occlusal

If you Label Each Root On maxillary Molars, Where to they extend to?

Distal Buccal Root : Distal side
Palatal/Lingual Root : Toward the Center
Mesial Buccal Root : Mesial Side

If you section A TOOTH, Name each Part.

1. Enamel
2. Dentine
3. Cementum
4. Pulp

In Mandibular Molars are the Lingual Cusp Shorter?

No, Lingual cusps are taller, but appear short do to the Lingual Tilt

Ligament Fibers located after the Horizontal fibers and at the Apix of the root?

Apical Ligament Fibers

Ligament Fibers located at the tooth furcation?

Interraducular Ligament Fibers

Ligament Fibers located below the Alveolar Ligament Fibers?

Horizontal ligament Fibers.

Ligament Fibers that are located toward the top of the alveolar bone?

Alveolar Ligament Fibers (located below Tanssepter ligament).

Ligament Fibers that connects teeth to one another?

Transseptal Ligament Fibers (located above the alveolar bone ligaments).

Ligament that are located after the Horizontal ligament Fibers?

The Oblique ligament Fibers (located at the Middle third of the tooth root).

Lower Arch is Named?

Mandibular

Major Groves on Maxillary molars are four, What are they?

Mesial Central Groove
Distal Central Groove
Buccal Groove
Lingual Groove
Fifth Cusp Groove (Cusp of Carabelli)

Mandibular 1st pre molars have what on the ML

They have a ML Groove

Maxillary Molars may Have A fifth Lingual Cusp, What is it called?

Cusp of Carabelli

Portion of the pulp in the Crown the tooth is called?

The Pulp Chamber

Premolars are what number from the Midline in each dental arch?

4th and 5th tooth

Primary 1st Molars erupt in \_______ months?

About 13 Month (upper and lower).

Primary 2nd Molars erupt in \_________ months?

About 26 Months (upper and lower)

Primary Canines erupt in \______ months?

About 18 Months (upper and lower)

Primary Centrals erupt in \_______ months.

About 6 months (upper and Lower)

Primary Laterals erupt in \_______ months.

About 9 months (upper and Lower)

The International Numbering System For permanent Dentition?

4 Quadrants.
1. Number each Quadrant; \#1 upper right, \#2 upper Left, \#3 Lower Left and \#4 Lower Right.
2. From Central to Wisdom tooth (1-8)
3. Add the Quadrant \# first then the Tooth \# for the tooth Number and Quadrant location. (UR Central Is 11, and UL Canine is 23).

The International Numbering System for Primary Dentition?

4 Quadrants.

1. Number Each Quadrant; (note: permanent were 1 to 4) Primary will be 5-8. Upper Right \#5, Upper Left \#6, Lower Left \#7, Lower Right \#8.
2. Count Tooth From Central To 2nd Molar.
(1-5)
3. Quadrant \# first then The Tooth \#. To show the Tooth Number and Quadrant location. (UR Central is 51, and UL Canine is 63.

The outer Surface of a Crown is Called?

Enamel

The part of a tooth visible to the eye is called?

Clinical Crown

The portion of the Pulp in the Root Space of the tooth is called?

The root Canal

Universal Numbering System for Permanent Dentition?

Numbering teeth 1-32 (Starting Upper Right Wisdom tooth \#1, Ending on Upper Left Wisdom tooth \#16. Then From Lower Left Wisdom tooth \#17 Wrap around to Lower Right to end at Wisdom tooth \#32).

Universal Numbering System for Primary Dentition?

Numbering teeth A-T (Starting on upper Right 2nd Molar \#A, Then Wrap Around to Left 2nd Molar \#J. From Lower Left 2nd Molar \#K Wrap around to the Lower Right 2nd Molar \#T.

Upper Arch Is Named?

Maxillary

Upper Molars have What occlusal transverse ridge?

Only Maxillary Molars have an Oblique Ridge

What and where are class V carries?

Class V Decay:

At the cervical 3rd (edge) of a tooth by the CEJ.

What are ebrassures?

Triangular shaped shapes formed from tooth to tooth.

What are Embrasures in teeth good for?

They are present to direct food during mastication.

What are Supernumerary Teeth?

(extra teeth)
1. Maxillary: Central Incisors or Third Molars.
2. Mandibular: Usually Premolar

What are supplemental Grooves?

Small Irregularly placed grooves not at the junction of lobes or major portions of the teeth

What are the Dental numbering systems and what are there names?

There are three.
1. Universal Numbering System
2. Palmer Notation System
3. International Numbering System

What are the Five types Are Periodontal Ligaments?

1. Alveolar Crest Fibers
2. Horizontal Fibers
3. Oblique Fibers
4. Periapical Fibers
5. Interradicular Fibers

What are the Letters for Primary Mandibular Centrals?

OP

What Are the Letters for Primary Maxillary Centrals?

EF

What can thumb sucking Cause a dental arch to do?

It may cause the Dental Arch to become more Tapered or V shaped.

What Canines Have two roots, Maxillary or Mandibular?

The Mandibular Canines may have bifurcated roots.

What Classifies a Class I Occlusion?

The Maxillary First Molar, Mesial Buccal Cusp is Occluding at the Buccal Groove Mandibular First Molar.

What Classifies a Class II Occlusion?

The Maxillary First Molar, Distal Buccal Cusp is Occluding at the Mandibular First Molar Buccal Groove.

What Classifies a Class III Occlusion?

The Maxillary 2nd Premolar Buccal cusp is occluding with the Mandibular First Molar Buccal Groove.

What direction are Lateral Movements?

Side to side movement

What does MIP stand for?

MIP \= Maximum Intercuspital Position (Teeth occluded with no movement).

What Fibers connected to a tooth, help tooth stabilization?

Transseptal Fibers They are connected from tooth to tooth.

What is a characteristic of Premolars?
a) Trifurcation
b) Bifurcation

b) Bifurcation

What is a dental Picket Fence used for?

To find occlusion relation ship between upper on lower teeth.

What is a Triangular Ridge?

The ridge from any cusp tip to the center of the occlusal surface.

What is An Oblique Ridge?

Only found on Maxillary molars ( made by the Triangular ridges of the ML and DB cusps).

What is and extreme Distal Root Curvature called?
a) Curled
b) Bend
c) Flexon

c) Flexon

What is Anterior Edge to Edge Bite?

When all teeth are at MIP and Anterior Incisors Close Incisor edge to Incisor edge

What is Anterior Open Bite?

When the Posterior Teeth Occlude but anterior Maxillary and Mandibular Incisors Cant Occlude or Come together.

What is Anterior Over Bite?

When Maxillary incisors Occlude over and cover Mandibular Incisors. (Mandibular Incisors May touch the Maxillary palate).

What is Anterior Over Jet?

When Maxillary Incisors, protrude facial and Over Paste the Mandibular Incisor edge.

What is Dens in Dente?

A Tooth with in a tooth

What is Hutchinson's Incisors

(Congenital caused by syphilis) the mother passes on to the unborn child. Notches on the incisors of the Primary Dentintion

What is Posterior Cross bite?

Distal Maxillary Posterior teeth Cusps don't MIP Over Buccal of mandibular Posterior teeth.

What is Talent Cusp?

Extra Cusp, it's a small projection in the cingulum area of Maxillary or Mandibular teeth.

What is the Anatomical Crown?

Where the Enamel Ends and the Root Begins

What is the Cemento Enamel Junction (CEJ)

Cervical line that separates the Anatomic crown from the Anatomic root

What is the Cementodentinal Junction (CDJ)

On the Root of a tooth where the Outer Cemento Lining separates from the Root Dentin.

What is the curve of Spee?

Buccal or side view of the teeth

What is the curve of Wilson?

Looking at teeth from the Facial view or distal forward.

What is the Dento enamel Junction (DEJ)?

On the Crown portion of a tooth, Where the Enamel ends and the Dentin Begins.

What is the enlargement or Bulge on the cervical third of the lingual surface of the crown of anterior teeth?

Cingulum

What is the Palmer Notation for Primary Dentition?

4 Quadrants, Divide by bracktes
Start count From Central Incisors to 2nd Molars. (5 per Quadrant)
1. Primary Dentition: A, B, C, D, E (In a bracket for the quadrant)

What is the Palmer Notation System?

4 Quadrants, Separated By Brackets
Start count From Central Incisors to Wisdom teeth. (8 Per Quadrant)
1. Permanent Dentition: 1, 2, 3, 4, 5, 6, 7, 8
2. A Number is placed in a bracket Showing which Quadrant the tooth corresponds to (see pic.).

What is the space where the roots divide on a multi rooted tooth called?

Furcation

What is the usual shape of an ideal dental Arch?

They are U shaped?

What mandibular teeth Have a furcation in the roots?

Mandibular 1st and 2nd Molars have
Two Roots

Two Canals, or
Two roots three canals,
With the third Root Canal in the Mesial root.

What Mandibular Teeth have No Furcation?

Mandibular Centrals and Laterals
Mandibular Canine (one root But possible two roots two roots canals.

What Muscles are involved in Mastication?

1. Masseter Muscle (up and down motion)
2. Lateral Pterygoid Muscles (Side to side Motion)

What Premolar may have two lingual two cusp?

The Mandibular 2nd Premolar "may" have three (one buccal two lingual).

What type of Caries is Popular in Molars?

Class I carries, In Pits and Fissures

When a tooth is positioned Above the Normal line of Occlusion, is called?

Supraverion

When a tooth is positioned Distal its Normal line of occlusion, is called?

Distoversion

When A tooth Is positioned toward the Buccal or facial of its normal line of occlusion, is called?

Labioversion

When a tooth is positioned toward the Lingual or tongue of its normal line of occlusion, is called?

Lingoversion