PMC4142276_01
Resorbed mandibular ridge.
CRID2014-253731.001.jpg
PMC4142276_01_CRID2014-253731.001.jpg
fig1
On intraoral examination, mandibular ridge was resorbed (Figure 1).
Conventional technique.
CRID2014-253731.002.jpg
PMC4142276_01_CRID2014-253731.002.jpg
fig2
In the first technique mandibular secondary impression was made using conventional method, that is, zinc oxide eugenol wash impression after border moulding with green stick compound in open mouth position (Figure 2).
Admixed technique.
CRID2014-253731.003.jpg
PMC4142276_01_CRID2014-253731.003.jpg
fig3
Wax spacer is removed; this homogenous mass is loaded and patient is made to do various tongue movements (Figure 3).
All green technique.
CRID2014-253731.004.jpg
PMC4142276_01_CRID2014-253731.004.jpg
fig4
Green stick compound was kneaded to a homogenous mass and was loaded on the special tray and border movements were done (Figure 4).
Functional technique.
CRID2014-253731.005.jpg
PMC4142276_01_CRID2014-253731.005.jpg
fig5
Tissue conditioning material was applied on the tissue surface of mandibular denture base and patient was asked to close the mouth in the prerecorded vertical dimension and do various functional movements such as puffing, blowing, whistling, and smiling (Figure 5).
Cocktail technique.
CRID2014-253731.006.jpg
PMC4142276_01_CRID2014-253731.006.jpg
fig6
This helps to stabilise the tray in position by preventing anteroposterior and mediolateral displacement of the tray during definitive impression (Figure 6).
Elastomeric technique.
CRID2014-253731.007.jpg
PMC4142276_01_CRID2014-253731.007.jpg
fig7
After the material has set, the impression was removed from the mouth and examined for any discrepancy (Figure 7).
Digital force measurement gauge.
CRID2014-253731.008.jpg
PMC4142276_01_CRID2014-253731.008.jpg
fig8
To compare the retention between six mandibular dentures, the method used by Burns et al. using force measurement gauge (Figure 8) was used in this study.
Denture with retention hook.
CRID2014-253731.009.jpg
PMC4142276_01_CRID2014-253731.009.jpg
fig9
A wire loop (0.9 mm in diameter) was placed on the geometrical center of the polished lingual surface to which the pull end of the force meter (graduated up to 196 N) was attached (Figure 9).
Patient with retention appliance.
CRID2014-253731.010.jpg
PMC4142276_01_CRID2014-253731.010.jpg
fig10
A vertical upward force was applied to dislodge the denture while the patient was sitting in an upright position with the occlusal plane parallel to the floor and the digital force measurement gauge (digital force gauge device model 47544, Extech Instruments Corporation) held in the palm of the hand (Figure 10).