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36 Cards in this Set
- Front
- Back
3 COMPONENTS OF DEVELOPING TOOTH GERM
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1. DENTAL ORGAN
2. DENTAL PAPILLA 3. DENTAL SAC |
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DURING DEVELOPMENT ITS CELLS DIFFERENTIATE INTO AMELOBLAST WHICH FORM ENAMEL
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INNER DENTAL EPITHELIAL LAYER
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CELL(S) CAN CONTINUE TO GROW WITHOUT DIFFERENTIATION
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1. INNER DENTAL EPITHELIAL LAYER
2. DENTAL ORGAN |
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EARLY STAGE OF ENAMEL FORMATION
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ENAMEL SECRETION
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MAIN COMPONENTS OF ENAMEL ORGANIC MATRIX THAT ARE SYNTHSIZED AND SECRETED BY AMELOBLAST
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1. AMELOGENIN
2. ENAMELIN |
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REASON ENAMEL IS UNIQUE THAN PREDENTIN OR OSTEOID
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DOES NOT HAVE A SECRETED LAYER OF UNMINERALIZED MATRIX
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A SHORT PERIOD IN WHICH AMELOBLAST CHANGE FROM SECRETORY CELL TO PERFORMING A TRANSPORT FUNCTION IN LATE AMELOGENESIS
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TRANSITIONAL STAGE OF ENAMEL FORMATION
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IN TRANSITIONAL STAGE OF ENAMEL NUMBER OF AMELOBLAST ARE SIGNIFCANTLY REDUCE BY
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APOPTOSIS- GENETICALLY PROGRAMMED CELL DEATH
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IN TRANSITIONALL STAGE OF ENAMEL MOST THE PROTEIN SYNTHESIZING ORGANELLES ARE ELIMINATED BY
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LYSOSOMAL ACTION
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LATE STAGE OF ENAMEL FORMATION
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ENAMEL MATURATION
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ENAMEL STAGE WHERE SELECTIVE LOSS OF ENAMEL PROTEIN OCCUR AND MASSIVE INFLUX OF CALCIUM AND PHOSPHATE PROVIDE GROWTH FOR HYDROXYAPATITE CRYSTALS ( HIGH INORGANIC CONTENT)
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LATE STAGE- ENAMEL MATURATION
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CELL THAT DERIVED AMELOBLAST
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INNER DENTAL EPITHELIAL LAYER OF THE DENTAL ORGAN
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INNER DENTAL EPITHELIAL LAYER BEGIN TO DIFFERENTIATE AT THE GROWTH CENTER LOCATED IN WHICH PORTION (S) OF A DEVELOPING TEETH AND CONTINUE IN CERVICAL DIRECTION
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1. CUSP TIP
2. INCISAL EDGES |
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A PRIMARY ENAMEL START OUT AS SIMPLE CUBOIDAL CELL WITH CENTRALLY LOCATED NUCLEI AND BECOME COLUMNAR CELL
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INNER DENTAL EPITHELIAL LAYER
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AN INNER DENTAL EPITHELIAL LAYER CELL (COLUMNAR) WHICH ACQUIRE MORE PROTEIN SYNTHESIZING ORGANELLES
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PRE-AMELOBLAST
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A CELL WHICH INDUCES PRE-AMELOBLAST TO COMPLETE THEIR DIFFERENTIATION TO SECRETORY AMELOBLAST
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FIRST LAYER OF DENTIN FORMED
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A TALL COLUMNAR CELL WITH CONE SHAPED TOMES PROCESSES AT THEIR DISTAL ENDS, INTERDIGITATE WITH THE SURFACE OF NEWLY SECRETED ENAMEL GIVING A PICKET FENCE APPEARANCE
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SECRETORY AMELOBLAST
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A STRUCTURE THAT DETERMINE THE ORIENTATION OF THE NEWLY NUCLEATED HYDROXYAPATITE CRYSTAL
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TOMES PROCESS
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ORGANELLES FOUND IN THE SECRETORY AMELOBLAST
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1. WELL DEVELOPED GOLGI COMPLEX
2. MANY GRANULAR ENDOPLASMIC RETICULUM CISTERNAE 3. NUMEROUS MITOCHONDRIA 4. SECRETORY GRANULES |
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JUNCTIONAL COMPLEX PRESENT AT THE DISTAL AND PROXIMAL END OF SECRETORY AMELOBLAST
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1. TIGHT JUNCTION
2. INTERMEDIATE TYPE 3. DESMOSOMES |
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JUNCTIONAL COMPLEX PRESENT ALONG THE LATERAL SURFACE OF SECRETORY AMELOBLAST
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1. GAP JUNCTION
2. DESMOSOMES |
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ABSENT OF THIS STRUCTURE INDICATE ENAMEL SECRETION IS NEAR ITS END AND BECOMES PRISMLESS
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TOMES PROCESSES DISAPPEAR
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LOCATION OF JUNCTIONAL COMPLEX AND TERMINAL BAR
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1. DISTAL END
2. PROXIMAL END |
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WHAT HAPPEN WHEN ENAMEL REACHES ITS FULL THICKNESS IN THE TRANSITIONAL STAGE
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1. AMELOBLAST BECOME SHORTER CELL
2. CONTAIN MANY LYSOSOME AND AUTOPHAGIC VACUOLES 3. PROTEIN SYNTHESIZING ORGANELLE ELIMINATED |
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AT WHICH STAGE IS THE NUMBER OF AMELOBLAST IS REDUCED BY AS MUCH AS 50%
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TRANSITIONAL AMELOBLAST STAGE
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LONGEST STAGE OF AMELOGENESIS, WHEN AMELOBLAST MODULATE B/W TWO TYPES DEPENDING ON THE MORPHOLOGY OF THEIR DISTAL END
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ENAMEL MATURATION
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2 TYPES OF MATURATION AMELOBLAST
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1. RUFFLE-ENDED
2. SMOOTH- ENDED |
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A MATURE AMELOBLAST WHICH POSSES NUMEROUS DISTAL MICROVILLE CONSTITUTE 80%
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RUFFED -ENDED AMELOBLAST
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A MATURE AMELOBLAST WHICH HAVE SMOOTH DISTAL ENDS AND ACCOUNT FOR 20%
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SMOOTH-ENDED
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A STAGE BEFROR TOOTH ERUPTION AMELOBLAST LOSE THEIR DIFFERENTIATION AND TOGEHTER W/ OTHER LAYERS OF DENTAL ORGAN REMAIN ON THE ENAMEL SURFACE AS REDUCED ENAMEL (DENTAL EPITHELIUM)
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END OF ENAMEL MATURATION
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DURING MATURATION A SPACE OCCUR AFTER THE LOSS OF ITS ORGANIC MATRIX SEEM ON GROUND SECTION
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ENAMEL SPACE
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TRUE OR FALSE; DURING ENAMEL MATURATION MOST OF THE ENAMEL PROTEIN ARE LOST
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TRUE
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PROCESS WHEN HIGHLY MINERALIZED ENAMEL ARE LOST
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HISTOLOGICAL PROCESSING ( (DEMINERALIZATION)
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A STAGE ENAMEL PROTEIN ARE SECRETED AND PARTIALLY MINERALIZED
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EARLY ENAMEL STAGE
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CHARATERISTICS OF LATE MATURATION STAGE
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1. MASSIVE AMOUNT OF CALCIUM AND PHOSPHATE DEPOSITED
2. SELECTIVE LOSS OF ENAMEL PROTEINS AND WATER OCCUR |
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AN ENAMEL THAT REMAIN AFTER A ENAMEL IS FULLY FORMED, THE AMELOBLAST LOSE THEIR DIFFERENTIATION
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REDUCED ENAMAL EPITHELIUM
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