AGEING IN DENTAL TISSUES

AGEING IN DENTAL TISSUES

1. AGEING OF SKIN

   • Loss of RETE PEGS+thinning

2. MAX CELL MULTIPLICATION

   • Normal cells have a max amount of times they can divide and mulitply
     • Hayflick Phnemonea, depends on species

3. ORAL MUCOSA

   • Thinned by up to 30% form 20-80yrs
     • less complex structure - Loss of Rete Pegs
       • Sublingual varicosities:occurs +70yrs
         • Sebaceous Glands: become more prominent and can appear white
           • Atrophy of Taste Buds/changes in taste

4. ELDERLY MUCOSA

   • More susceptible to damage ie smoking alcohol

5. SALIVA

   • FUNCTIONS:lubricant, solvent, digestion, protection, bolus formation
   • antibacterial, antiviral
   • STRUCTURAL CHANGE
     • ADIPOSE tissue decreases
       • FIBROUS tissue decreases
         • VASCULARITY decrease
           • DUCT dilation
             • ONCOCYTIC change

6. MINOR GLANDS

   • SEROUS:fatty replacement of serous tissue
     • MUCOUS:fibrous replacement of secretory tisue
       • This can occur due to Chronic Inflammation