Notes

CLASSES OF ANGLES AND TOOTH NUMBERING AND LINE ANGELS

1-Which structure gives rise to intrinsic muscle of tongue ? Occipital myotome

2-Where exactly the thyroglossal duct starts in the tongue ? Foaramin sicam

3-Picture of the frontonasala and maxilla i should know for the oreofacial development

4-When buccaupharyngeal membrane ruptures which two parts of cavity are connected? (Ectoderm and endoderm )the buccupharengeal membrane separates so when it rupters there is a continuityof oral cavity to the gut .
5- a structure which is affected during the tounge development? The palatal development the hard palate (palatal shelfs are closed) .

6- the salivary gland is derived from (glandular structure) ? Ecroderm

7- The connective tissue the stroma (salivary gland stroma ) is derived from ectomesenchime
In the neck area connective tissue is ectomecemchime .

8- any of the permanent anterior teeth may have bifurcated roots? Mandibular canine

9- a picture of the tooth structure will be asked with the markings

10 -numbering system 3 to 4 mcq

11 - 2 teeth that touch each other from mesial to mesial surface ? Maxillary central incisor and mandibular lower incisor .

12-a tooth that has one antagonist tooth? Mandibullar central incisors and maxillary third molars.
13- how do we call a tooth that is not there like lateral incisors? Congenital absent (means at birth) but peg lateral is more related to genetic.

14-how many lobes are involved in the development of upper lateral incisors? 4 lobes but for the posterior teeth it will be 5 lobes .

15-a child around 6 years how many number of teeth i will expect? 18 deciduous with 6 permanent. __tricky

16- the land mark that is present in the anterior teeth ? Mamelons or cingulum

17- the agly ducklings stage is in which stage ? 9 to 11

18- line angle i have to check 1 to 2 mcq .
Anterior teeth i can differentiate from labial and lingual surface from the cingulm and posterior teeth from the number of cusps

19- which structure in the posterior teeth is more prone for carries ? Grooves and fissures or pits and fissurs

20- the cusp of carabali is located in which cups ? Mesiolingual cusp

21-which cusp is largest in thelower first molar ? Mesiobuccal cusp

22-which is the smallest premolar ? Mandibular first premolar

23-one anterior tooth which may show lingual pit ? Maxillary lateral incisor

24-maxillary lateral incisor can have the following ones ? Peg shaped or lingual pits or it could be absent

25-cells of non-keratinocytes are …
Basal cells are keratinocytes
4 days granulars what are they?
Sebaceous glands In the oral cavity are called ectopics

26- anterior two thirds of the tongue taste the sensation why? Facial nerve and Chorda Tympani

27-which one is the first endocrine gland developed? Thyroid gland

28-areas which are keratinized in the oral cavitiey or Orthokeratinized? masticatiry mucosa gingiva and hard palatal

29- lower lips are formed by? Mandibular process
Upper lips are formed by two maxillary processes as well as part in the filtrum is medial nasal .

30- the other name for the primity oral cavity? Stomatidum

31- any structure which is related to endoderm origin in the oral cavity ? Posterior one third

But anterior 2/3 is from ecroderm

32- which process help with the formation of the palate ? Pre maxilla (the medial nasal process __

33- how many ameloblasts are involved in one enamel rod ? 4 because head forms 1 and tail formes 3

34-mantle dentin where is firstly formed ? Close to Dentinoenamel junction

35-content of enamel ? 96 hydroxyapetite inorganic and 4% organic and water

36- which supplies the taste but after ? The anterior 2/3 same chorda tympani

37- buccal embracurs and lingual embracurrs with a pic to mark

38- angles class 1 and 2 and 3
Class one is mesiobuccal of the upper or the buccal groove of the lower
Class 2 the maxilla is forward __
Class3 the mandible will be forward.

39-if the radiograf shows all 3rd molars crowns are completed so what is the age ?

40- why enamel do not have the capacity to self repair ? Because the formative cells (ameloblasts ) are lost .

41 - the cells which forms dentin? Ofontoblasts and its derived from dental papila
And cells for enamel are ameloblasts and they are derived from ecroderm
Periodontal ligaments are formed from fibroblasts they come from dental sac ectomecenchime .

42-the structures of enamel line gnarled enamel , enamel lamella , enamel tufts these are the hypocalcified structures.
A picture for the periodontal ligament for its fibers
43- what is the manifestation for stria of retzus (on the surface of the tooth how will it be manifested ) ? Perikymata

45- which structure helps with root formation during tooth development? Hertwig's Epithelial Root Sheath (HERS) and The cell rests of Malassez are remnants of Hertwig’s Epithelial Root Sheath (HERS) that persist in the periodontal ligament (PDL) after root formation is complete

46- what is the defining characteristics of a delta fibers ? Sharp and fast (a delta)

47- a patient came with a severe pain and the pain is dull what type of fibers are involved ? C unmyelinated fibers .

48- tempro mandibular joint is a joint between the mandibular and the skull or cranium .

49- what it is tempromandibular jont what is the nerve supply ? TMJ trigeminal nerve 5 cranial nerve and 7th is for taste .

50-muscles of mastication facial expressions ?
Muscles of mastication by the mandibular nerves (trigeminal nerve 5th ) and facial expressions by facial nerve (7th nerve) .

51 - when there is an accumulation of biofilm formation ? Is dental plaqe

52-when we see keratinized epithelium which layer is more prominent than non keratinized epithelium microscopiclly? Granular layer .

53-when second premolar develops where it will develop? Lingually to primary second molar .

54-fluoride content can be reach in which food type ? Fish and tea

55- pre eruption, post eruptive the definition can be asked and movment from when to when

Angles classification can be asked

Some pictures related to the cord , canal and what is inside .

56- when the tooth is in different position if it is towards labial side it is labioversion and if it is more position to distil it is distoversion and all the athoer types i should know .

57- when it is cementum what is the peculiarity of this one ? It helps with orthodontic movement its more resistant to resorption.

58- age estimation pic

59- when we do the extraction for posterior teeth when we compare to anterior it will be difficult why? Because of the buccal bone or corrical that is very hard in the posterior teeth .
When the bone is thin it will be more pron to fracture .

60-when there is no tast sensation what is it called ? Ageusia

61-when the dentin is formed through out the life what is it named ? Secondary dentin
But when it is for repair it is called tertiary dentin or reparative dentin .

62- when there are problem in the anterior tooth some teeth are more prone to develop palatal lesion which tooth ? Lateral incisors they produce palatal abscess.

63- patients went for radiation treatment what is the problem ? Salivary gland will be affected and there will be xerostomia and hyposalivation

When there is less salivation what will happen to the patient? He will be more prone to carries

64- in the structure which is not present in the gingival area ? Salivary gland

65- how the stippling of gingiva is formed ? Because of poor of collagen fibers which is attached to the bone .

66- between the epithelial cells keratinocytes the junction is ? Desmosomes

67-Between the epithelium and the connective tissues the junction is named as ? Hemidesmosomes

68- what is the function of reduced enamel epithelium? It protects till the eruption of the tooth.

69- which cell is the target for calcitonin ? Osteoclasts

70- when their is hypoparathyroidsm tooth formation can be affected in what way during tooth development ? Enamel hypoplasia

71- what is the uniqe function for periodontal ligament? Transmit occlusal forces to the bone , stress distribution

72- what covers the articulating surface of condyle ? Fibro cartilage
normally all the bone the joins are hyalin cartilage

73- the name for the tempromandibular jonit can be ? Synovial , articulation , bilateral between the lateral and the cranium.

74-anterior teeth the expression of molecular homeopox gens are? MLX and for the posterior teeth is DLX

What is expressed on msx 1 and 2 ? The anterior teeth (insicors )

75 enamel structure will be there which one is hyper mineralized and which are hypo mineralized? Hyper mineralized for enamel rods , hypo mineralized are enamel tufts enamel lamella .

76-surface manifestations of incremental lines of retzus or stria of retruz is? Perikymata

77-the baby pattern gnarled enamel most common in the cusp of the area ?
❓Where is gnarled enamel most commonly found?
✅ Answer: In the cusp areas of the tooth

78-what is the vitamine important for tooth development? Vitamine D because it is related to calcium absorption

79-the keratinized papilla is ? Filliform papilla
Jaw jik reflexes it is closing reflexes.

80- what is the stage of the deglutition which is volentary ? Oral stage

81- the normal calcium serum level ? 9 to 10.5

82- the secretory antibacterial substance in the saliva and the tract which takes the pain sensation ? Lateral spinothalamip

83-pain sensation from the tooth carried by which nerve ? Trigemenal 5th cranial nerve .

84- when there is saliva which part neutralize the acid? Bicarbonate

85- which part of the salivary gland structure which has more mitochondria? straited duct

86-which one produces more of serous in the major salivary gland? Parotid gland

87- when there is no space between any primary teeth what gives you an opinion? The crowding is more possible during permanent.

88-muscles, internal organs and connective tissue bled originates from ? Mesoderm

89- this cell produces matrix and then produces the environment for bone formation? Osteoblasts

Cells of non keratinocytes are Melanocytes, langerhan cells, merkel cells, inflammatory cells (lymphocytes)