4. GOLD AMALGAM
Inert, well
polished, smooth
surface,
burnishable
Mercury and silver
have antimicrobial
effect
Biofilm mainly contains
Streptococcus mutans, Streptococcus
5. DENTAL IMPLANTS
• BIOFILM FORMATION IN:
FIXTURE FLUTES AND
SCREWS
• BIOFILM FORMATION LEADS
TO PERI IMPLANTITIS AND
LOSS OF
OSSEOINTEGRATION
• BIOFILM CONTAINS:
P. GINGIVALIS,
LACTOBACILLUS,
FUSOBACTERIUM,
6.
7. • CERAMICS ARE SMOOTH,
WELL POLISHED, INERT
AND GENERALLY HAVE
LOW AFFINITY TO
BIOFILM FORMATION
UNLESS ROUGHNESS IS
PRESENT.
• ROUGHNESS OCCURS DUE
TO MACHINING OF THE
CERAMICS AND
ADJUSTMENTS DONE TO
THEIR SURFACES
WITHOUT REGLAZING.
8. • CROWN MARGINS HAVE HIGH AFFINITY TO BACTERIAL
RETENTION DUE TO MICROGAPS AND FAILURE OF COMPLETE
ADAPTATION.
9.
10. • POLYMERS ARE ROUGH,
HAVE SURFACE PORES AND
GENERALLY HAVE HIGH
AFFINITY TO BIOFILM
FORMATION
• ACID RESIDUES MAKE THE
SURFACE ROUGHER AND
ALLOW EASIER PENETRATION