TY - JOUR ID - TI - The Effect of Denture Base Surface Treatments on Microlekage of Soft Lining Materials AU - Nadia T. Jaffer AU - Munther N. Kazanji PY - 2009 VL - 9 IS - 2 SP - 168 EP - 174 JO - Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان SN - 18121217 19980345 AB - Aims: To evaluate the effect of two acrylic resin denture base surface trearments on microleakage
of 4 soft denture lining materials (Tru–soft, Bony plus, UfiGel–P and Molloplast–B after 2 periods of
storage and thermalcycling. Materials and methods: One hundred eighty specimens for microleakage
were prepared in a disc shape 30 mm diameter and 4 mm thickness (2 mm for acrylic resin part and 2
mm for soft lining material part). Soft lining materials were bonded to three different groups of
acrylic resin surface pretreatments (untreated, sandblasted and monomer treated denture base). These
specimens underwent two aging procedures: Storage with two periods (one week and one month), and
500 cycles of thermalcycling inside 2% methylene blue dye. Results: Statistical analysis showed that
treating the acrylic resin denture base by sandblasting increased microleakage of silicone–based linings
(UfiGel–P and Molloplast–B)and decreased microleakage of acrylic–based linings (Tru–soft and Bony
plus) in comparison to untreated denture base, while treating the denture base with MMA monomer
positively decreased microleakage for all tested soft lining materials in relation to untreated and
sandblasted denture base at one week storage, one month storage and at thermalcycling. Conclusions:
For all types of denture base surface treatments, microleakage was inevitable, however, wetting the
acrylic resin denture base with MMA monomer was more effective in reducing microkeakage than
sandblasted and untreated denture bases.

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