Misc Facts on Boards (Weiss Workbook) and Dental Anomolies Flashcards
Largest incisal embrasure of the anterior teeth
- The distal contact of the MAXILLARY LATERAL INCISOR is quite cervical: In the middle 1/3 (related to the distal curvature of this tooth)
- The mesial contact on the MAXILLARY CANINE is at the the junction of the incisal and middle thirds.
- The incisal embrasure between these two teeth is the largest of the anteriors.
Proximal Crown Concavities of the Maxillary Posterior Teeth
Crown concavities on the proximal surfaces are found on the MESIAL SURFACES of the MAXILLARY FIRST PREMOLARS and on the DISTAL SURFACES of the MAXILLARY FIRST MOLARS (near the cervical line.
Shape of the outline of anterior teeth from proximal view
Triangular
Shape of interproximal space (or cervical embrasure) with apex = proximal contact
Triangular
Shape of the central developmental groove on mandibular second molar (with 2 cusps)
“U” shape or “H” shape
Shape of the grooves on occlusal of mandibular second premolars (with 3 cusps)
“Y” shape
Shape of occlusal outline of maxillary molars (with 4 cusps)
Rhomboid
Shape of PROXIMAL outline of crowns of mandibular posterior teeth
Rhomboid
Shape of occlusal outline of maxillary molars (with 3 cusps, i.e., without DL cusp)
Heart shape
Shape of outline of root (or pulp chamber) of maxillary first premolar at the cervical cross-section of the root
Kidney shape
Shape of occlusal outline of mandibular first molar
Pentagon (five sides with 2 on facial and one on lingual, mesial, and distal)
Shape of outline of FACIAL view fo canine and premolar crowns
Pentagon
Largest cusp of a mandibular first molar (cf. longest cusps or teeth)
Mesiobuccal cusp
Longest crown of MAXILLARY POSTERIOR teeth
First premolar
Tooth with most variable anatomy
Maxillary lateral incisor
Tooth most likely to be missing in adult dentition
Maxillary lateral incisor
Of all incisors, which tooth is most likely to have the most pronounced marginal ridges
Maxillary lateral incisor
Two types of teeth most likely to have 3 cusps
Mandibular second PM (F, ML, and DL) and Maxillary second molar (MF, DF, and L, DL is missing)
Define PRIMARY CUSP TRIANGLE
Formed by three cusps on maxillary molars: MF, DF, and ML
Incisors and canines and most premolars form from how many lobes?
4 Lobes (three from the facial cusp with the middle lobe forming mid-facial ridges; and the lingual lobe forming the cingulum or lingual cusp)
Mandibular second three cusp premolars form how many lobes?
5 Lobes: 3 facial and 2 Lingual
What is a distinguishing characteristic of the PRIMARY mandibular first molar
Prominent transverse ridge in the mesial half of the occlusal table
Define CENTRAL FOSSA LINE
The line running between posterior tooth cusps (following central grooves)
Occlusal tables are about ___-____% of the total buccolingual length of posterior teeth
55-65%
When do permanent mandibular central incisor begin calcifying?
3-4 months
When do permanent molars begin calcifying?
Birth
At age 8, describe the contact of permanent molars to primary molars
The mesial contact of the permanent first molar contacts with the distal of the primary second molars
What causes the spacing between primary teeth?
Growth of jaw bones
How many teeth are present at age 8?
24; 18 deciduous plus 6 permanent (four permanent molars plus two mandibular incisors)
What permeant teeth do the primary second molars resemble?
First permanent teeth (including cusp of Carabelli on maxillary molars)
Compared to teeth with more rounded roots, how many canals do you expect in an oval shaped root?
2; Therefor maxillary incisors are least likely to have 2 canals compared to other mandibular anteriors, and mandibular canine is most likely to have 2 roots compared to maxillary anteriors
Where are the placement of two roots on anterior teeth and premolars be located?
Facial and lingual
What maxillary anterior tooth is LEAST LIKELY to have proximal contact in the incisal third?
Distal of the Maxillary Canine (Distal of lateral also)
Where is the occlusion for the Maxillary first premolar lingual cusp
Maxillary first premolar lingual cusp occludes only with mandibular first premolar due to the mesial placement of the lingual cusp
Describe the physical relationship between the long buccal nerve and the masseter muscle
The long buccal nerve crosses OVER the masseter muscle
What nerves pass thru the Jugular Forament
CN XI, X, and IX (not XII)
What nerves are located in the infratemporal fossa?
Mandibular/Inferior Alveolar Nerve, Lingual Nerve, Posterior Palatine Nerve (NOT pterygopalatine ganglion)
What type of gland is the Parotid gland?
100% serous
What nerve passage is associated with the parotid gland?
Petrosal
What is another name for the mandibular fossa?
Glenoid fossa
What is another name for the TMJ ligament and what is its function?
TMJ ligament = Collateral Ligament; helps to hold the articular disc in place over the head of the condyle
What major veins drain into the pterygoid plexus?
Maxillary v., Deep facial v., Infraborbital v.
What does the term “ANTRUM” refer to?
Antrum refers to a sinus within a bone and may refer to the maxillary sinus specifically
What bones make up the Orbit of the Eye?
The Maxillary bone is the Floor; The Lacrimal and Ethmoid bones make up the Mesial side; The Zygomatic bone makes up the Lateral Wall; Frontal bone makes up the superior border (roof)
Define “OPERCULUM” and describe its clinical scignificance
Operculum is the extension of gingival tissue overlying the crown of an erupting tooth: often a third molar. Irritation and subsequent of this operculum can result in periodontitis
Compare anomolies to malformations
Anomolies are deviations from the norm which are genetic/embryonic in nature. Malformations are non-genetic deviations from the norm.
Define adontia
Absence of teeth
How common is total adontia?
Very uncommon; affects both Primary and Permanent teeth
