TCDHA HISTOLOGY ACTUAL TEST PAPER
2026 COMPLETE QUESTIONS AND
SOLUTIONS GRADED A+
●● amelogenesis.
Answer: process of enamel matrix formation and mineralization
occurs during appositional stage
DENTIN MUST BE PRESENT
●● enamel is first formed in.
Answer: cusp/tip area of tooth
●● ameloblasts.
Answer: produce enamel matrix
develop on inner surface of enamel organ (IEE)
cause outer cells of dental papilla to become odontoblasts
,●● tomes process.
Answer: secretes enamel matrix
●● enamel pearl.
Answer: small spherical enamel projections on root surface
●● enamel dysplasia.
Answer: faulty development of enamel
●● deepened pits and fissures.
Answer: common
when ameloblasts back into one another during apposition
larger areas for dental caries
●● sealants.
Answer: used in prevention of caries
●● Mineralization.
Answer: complete and immediate
,ameloblasts actively pump calcium hydroxyapatite into forming enamel
matrix as it is secreted by tomes process
●● enamel rod.
Answer: structural unit of enamel
key hole shaped
rods are aligned DEJ except in cervical regions of permanent teeth
●● lines of retzius.
Answer: seen with transmitted light
represent incremental growth lines that extend from DEJ
●● neonatal lline.
Answer: a pronounced line of Retzius marked by stress/trauma
experienced by ameloblasts during birth
●● nasmyths membrane.
Answer: primary enamel cuticle
delicate membrane covers entire crown of newly erupted tooth
, green or yellow- easily worn away
●● hunter-schreger bands.
Answer: seen with reflected light
change in direction from prism to next
originate from DEJ- run perpendicular to lines of retzius
strength against force
●● perikymata.
Answer: external manifestation of line of retzius
raised grooves on enamel surface
●● enamel spindles.
Answer: dentinal tubules that pass across DEJ into enamel and bcome
trapped
found beneath cusps and incisal tips of teeth
2026 COMPLETE QUESTIONS AND
SOLUTIONS GRADED A+
●● amelogenesis.
Answer: process of enamel matrix formation and mineralization
occurs during appositional stage
DENTIN MUST BE PRESENT
●● enamel is first formed in.
Answer: cusp/tip area of tooth
●● ameloblasts.
Answer: produce enamel matrix
develop on inner surface of enamel organ (IEE)
cause outer cells of dental papilla to become odontoblasts
,●● tomes process.
Answer: secretes enamel matrix
●● enamel pearl.
Answer: small spherical enamel projections on root surface
●● enamel dysplasia.
Answer: faulty development of enamel
●● deepened pits and fissures.
Answer: common
when ameloblasts back into one another during apposition
larger areas for dental caries
●● sealants.
Answer: used in prevention of caries
●● Mineralization.
Answer: complete and immediate
,ameloblasts actively pump calcium hydroxyapatite into forming enamel
matrix as it is secreted by tomes process
●● enamel rod.
Answer: structural unit of enamel
key hole shaped
rods are aligned DEJ except in cervical regions of permanent teeth
●● lines of retzius.
Answer: seen with transmitted light
represent incremental growth lines that extend from DEJ
●● neonatal lline.
Answer: a pronounced line of Retzius marked by stress/trauma
experienced by ameloblasts during birth
●● nasmyths membrane.
Answer: primary enamel cuticle
delicate membrane covers entire crown of newly erupted tooth
, green or yellow- easily worn away
●● hunter-schreger bands.
Answer: seen with reflected light
change in direction from prism to next
originate from DEJ- run perpendicular to lines of retzius
strength against force
●● perikymata.
Answer: external manifestation of line of retzius
raised grooves on enamel surface
●● enamel spindles.
Answer: dentinal tubules that pass across DEJ into enamel and bcome
trapped
found beneath cusps and incisal tips of teeth
