Effectiveness of Piezography technique for removable

partial denture construction

Y. ISHIKAWA1, H. SHIMPO2, and C. OHKUBO2,

1Sakuragawa Dental Clinic, Aomori, Japan, 2Tsurumi University, Yokohama, Japan

Materials and Methods Electroencephalograph & Image scanner

Measurement of alpha wave

Subjects：male：８ female：２２ total：３０ mean age ６２ years old

Both wax model denture was finished occlusal adjustment

Conventional wax model removable partial denture

Piezographic wax model removable partial denture

For PPDs, Piezography was applied using silicon impression material, and polished surface was formed according to

the Piezographic space.

For PPDs, Piezography was applied using ADHESIVE

For PPDs, polished surface was applied using silicon impression material

Piezography was applied for each subject was pronounced ,「Sa,Shi,Su,Se,So」

「Ta,Chi,Tsu,Te,To」,after it was doing dry swallow at three times.

Conventional and Piezographic wax model removable partial denture in the mouth

Conventional wax model removable partial denture in the mouth

Piezographic wax model removable partial denture in the mouth

For PPDs, Piezography was applied using silicon impression material, and polished surface was formed according to the

Piezographic space

Wax model denture’s polished surface was used to silicone impression material

Wax model denture’s polished surface was Formed according to the Piezographic space

Both CPD and PPD were fabricated

For conventional removable partial denture (CPD) into the model

For Piezographic removable partial denture (PPD) into the model

Duplicated removable partial denture’s first molar artifical polished surface cutting depth compare CPD with PPD

Duplicated removable partial denture’s first molar artifical polished surface cutting depth compare

CPD with PPD

PPD was depther 1.0 mm than CPD (the right buccal side). PPD was depther 0.9 mm than CPD (the right lingual side).

PPD was depther 1.5 mm than CPD (the left buccal side) PPD was depther 0.7 mm than CPD (the left lingual side)

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Apply Piezography to make removable partial denture

Old denture New denture

Apply Piezography

Subject ：78 years old female