MIDTERM OFFICIAL Flashcards
Soft tissue that develops into a tooth
Tooth germ
When do tooth buds begin to grow
During 6th wk of fetal life
Early tooth socket
Crypt
Which tooth structures form first
- Dentin & enamel
- Cementum
The dentin that forms during the 6th wk of fetal life is called
Primary dentin
Secondary dentin is formed _______
Continuously throughout life
Secondary dentin is produced after
Root formation or completion
When do primary teeth begin to calcify (get harder)
4th or 5th month of fetal life
Hardening of tooth tissue by deposition of mineral salts
Calcification
Calcification of primary teeth continues until the _____ or ______ year after birth
3rd or 4th
Soon after birth ________ teeth begin to calcify
Permanent
What dentin is laid down locally as protection for the pulp from irritation, caries, or trauma
Reparitive dentin
Calcification continues until about the _____ year when roots of wisdom teeth become calcified.
25yrs
Each tooth begins to form from ____ or more growth centers
4
Growth centers grow out from the tooth germ and are known as _________ lobes.
Developmental lobes
The fusion of lobes is called ________
Coalescence
The junction that forms the union of lobes is marked by lines on the teeth called
Developmental grooves
When do deciduous first molars erupt
14-18 months
When do deciduous canines erupt
17-23 months
When do deciduous second molars erupt
23-31 months
The first teeth to appear in the mouth are usually
Mandibular central incisors
When deciduous canines erupt, they bring supporting bone with them called
Canines eminence
All deciduous teeth are expected by what age
2.5
Premature loss of deciduous teeth may cause
abnormal jaw and growth development
The first of the permanent teeth to emerge are usually the
Mandibular 1st molars
The permanent mandibular 1st molars emerge distal to the
Deciduous second molars
________ is the tendency of the permanent molars to have an eruptive force toward the midline
Mesial drift
Because there is little extra space for the permanent 1st premolar, the infringement of the permanent molar into this space may what-
Keep a molar or canine from properly erupting
_______ is the process by which the roots of a baby tooth are resorbed and dissolved until so little root remains that the baby tooth falls out
Exfoliation
________ destroy the roots of the deciduous teeth
Osteoclasts
T/F: Maxillary premolars often precede the mandibular molars
True
Often referred to as 12 yr molars
Maxillary second molars
_______ teeth that do not completely erupt but remain embedded in bone or soft tissue
Impacted teeth
The 3rd molars do not appear until age ___
17
What teeth are most likely to be impacted
3rd molars
What teeth are most common teeth to be congenitally missing
Max and mand 3rd molars
_____ is the wearing away of the tooth through contact with its functional surfaces
Attrition
As the teeth erupt and meet their posing tooth in the opposite arch, they form what is known as the
Occlusal plane
When do permanent Max and mand 1st molars erupt
6-7 years
The period of _______ dentition begins with the eruption of the 1st deciduous tooth
Primary
T/F: When the 1st permanent molar erupts, the period of primary dentin ends
At what age do you see mixed dentition
6 yrs of age
The period of _______ dentition begins when the last primary tooth is lost and when the last _______ tooth is lost
Permanent
Edentulous
No teeth
_____ Runs from the margins of the lips posterily to the area of the tonsils
Oral mucosa
The oral mucosa is composed of what types of tissue
Stratified squamous epithelium and connective tissue
Layer of dead cells, no nuclei
Keratinized
Dead and dying cells with and without nuclei
Parakeratinized
Cells that are alive and have nuclei
Non-keratinized
What is the function of mucosa
Protects oral structure
Secreted moisture
Absorbs nutrients
3 types of oral mucosa
- Specialized
- Masticatory mucosa
- Lining mucosa
Specialized mucosa is found
On the dorsal of the tongue
Masticatory mucosa is found
Gingiva & hard palate
Lining mucosa is found
- Labial/buccal
- Alveolar
- Soft palate
- Ventral of the tongue & floor of mouth
Loose, flexible & unattached tissue
- Lining mucosa
- Masticatory mucosa
- Specialized mucosa
Lining mucosa
This mucosa is firm, thick & immovable
- Lining mucosa
- Masticatory mucosa
- Specialized mucosa
Masticatory mucosa
____ is a part of the interdental gingiva that is apical to the contact area and connects the facial & lingual interdental papillae
Col
_______ Is the space from the gingible margin to the base of the circus where it attaches to the tooth
Sulcus
What is one of the first areas involved in periodontal disease?
Interdental papilla
______ is the line between alveolar mucosa and attached gingiva
Mucogingival junction
The space that exists between the lips or cheeks and the teeth is known as the
Vestibule
The ares surrounded by the teeth back to the palatine tonsils is called the
Oral cavity proper
Bone that forms the sockets of the teeth
Alveolar bone
The point where lips/cheeks turn to go toward the gingival tissue
Mucobuccal fold
Mucosa laying against the alveolar bone, loosely attacjed and moveable, reddish due to many blood vessels
Alveolar mucosa
The point where the gingiva becomes tightly attached to the bone
Mucogingival junction
Misplaced sebaceous glands
Fordyce granules
Bony growths on the buccal cortical plate of the max & mand
Exostosis
________ is the anterior pillar
- Palatoglossal arch
- Palatopharyngeal arch
Palatoglossal arch
_______ is the posterior pillar
- Palatoglossal arch
- Palatopharyngeal arch
Palatopharyngeal arch
______ is the space between left and right tonsils
Fauces
_____ is the opening for the ducts of 2 major salivary glands, submandibular & Sublingual Glands
Sublingual caruncles
Small openings for the Sublingual salivary gland are found along the ________ fold.
Sublingual fold
The tongue starts to develop about
4 1/2 weeks in utero
The tongue muscles are divided into 2 groups
- Intrinsic
- Extrinsic
The tongue is covered with what type of epithelium
Stratified squamous epithelium
A
Foliate
B
Circumvallate
C
Filiform
D
Fungiform
- Around 13 elevations (V)
- V-shaped row facing posteriorly of circular raised elevations
- Divides Posterior 1/3 and ant 2/3
Circumvallate
- Anterior 2/3 of tongue,
- Tiny, round, red, raised, spots
- Taste buds in these papillae
Fungiform
- Remainder anterior 2/3 of tongue
- Slender, threadlike, pointed projections
- No taste buds
- Tactile sensation
Filiform
- Posterior 1/3 of tongue and on lateral (side)
surfaces, close to vallate papillae - Few taste buds, not well developed
Foliate
The crown and the root are joined at the
CEJ
the whole crown of the tooth that is covered by enamel (regardless of whether it is erupted)
Anatomical crown
the part of the crown that is visible above the gingiva
Clinical crown
The line formed by the junction of the cementumand the enamel is called the
CEJ
Division of 2 root segments
Bifurcation
Division of a root into 3 segments
Trifurcation
Between the roots is called _____
Furcal region
The portion of the jaw that supports the teeth is called the
Alveolar process
Tubercles
Marginal Ridge
Fossa
Cingulim
A
Interproximal space
B
Occlusal embrasure
The void is called
Cervical embrasure
PRIMARY -
Mandibular 2nd molars (distal) are situated more mesial than maxillary molars
Mesial step
PRIMARY-
2nd mandibular molars are even with each other on both arches
Flush terminal plane
PRIMARY-
2nd mand molars are situated more distal than the maxillary molars
Distal step
The largest primate spaces are found
Mesial to the max primary canines & distal to the mand canines
Class III Prognathic
Class II Retrognathic
The mesiobuccal cusp of the maxillary 1st molar is directly in line with the buccal groove of the mandibular 1st molar.
Class I relationship (neutroclusion)
exists when the buccal groove of the mandibular first molar is posterior to the mesiobuccal cusp of the maxillary 1st molar
Class II occlusal relationship (distoclusion)
A
Class II, Divison 1
B
Class II, divison II
exists when the buccal groove of the mandibular 1st molar is more anterior than normal to the mesiobuccal cusp of the max 1st molar
Class III occlusal relationship (mesioclusion)
lateral excursion
The max first molar is tipped mesially so that it touches the mandibular 1st molar and 2nd
molars - In contact with 2
Stolarized Molars
What class
Class I
What class
Class II
What class
Class III
What class
Class IV
What class
Class V
