(7) Alternative Denture Techniques
Traditional way of making dentures (order of procedures)
Massad Impression Trays
-thermoplastic tray (can be heated, molded :: eliminates need to make custom
tray)
-customizable intraorally
-more shallow than stock tray
-reduces lab, chair time cost (eliminates one appt)
-pt comfort when molding due to designed rapid cool rate
How to assess tissue displacement during massad impression technique
-evaluate resilience of soft tissues overlying residual ridges
-palpate soft tissues / use blunt instrument to determine relative amount of
displacement of mobility (use lighter PVS in flabby areas)
Initial step to take before selecting size of Massad impression technique
Assess tissue displacement
Massad Impression technique- how to select size of tray
Choose tray closest to ridge size
, Massad Impression technique- how to customize tray
-submerge just body of tray (NOT handle) into water bath 165-170 deg for 15-
30 sec
-place tray into mouth; shape tray into mouth (have pt do functional
movements)
-trim overextended areas
-apply PVS adhesive for tissue stops
Massad Impression technique- what impression material to load onto Massad
tray
PVS (NOT alginate)- Massad trays are for final impressions
Massad Impression technique- tissue stops
- describe (material + location)
- purpose
Place heavy body PVS
in premolar, incisor area (+ palate for max)
-adequate tissue relief for impression material
-help to reposition impression intraorally
Traditional way of making dentures (order of procedures)
Massad Impression Trays
-thermoplastic tray (can be heated, molded :: eliminates need to make custom
tray)
-customizable intraorally
-more shallow than stock tray
-reduces lab, chair time cost (eliminates one appt)
-pt comfort when molding due to designed rapid cool rate
How to assess tissue displacement during massad impression technique
-evaluate resilience of soft tissues overlying residual ridges
-palpate soft tissues / use blunt instrument to determine relative amount of
displacement of mobility (use lighter PVS in flabby areas)
Initial step to take before selecting size of Massad impression technique
Assess tissue displacement
Massad Impression technique- how to select size of tray
Choose tray closest to ridge size
, Massad Impression technique- how to customize tray
-submerge just body of tray (NOT handle) into water bath 165-170 deg for 15-
30 sec
-place tray into mouth; shape tray into mouth (have pt do functional
movements)
-trim overextended areas
-apply PVS adhesive for tissue stops
Massad Impression technique- what impression material to load onto Massad
tray
PVS (NOT alginate)- Massad trays are for final impressions
Massad Impression technique- tissue stops
- describe (material + location)
- purpose
Place heavy body PVS
in premolar, incisor area (+ palate for max)
-adequate tissue relief for impression material
-help to reposition impression intraorally
