METHOD FOR EVALUATING POLYMERIZATION STRESS INFLUENCE CAUSED BY CONTEMPORARY COMPOSITE FILLING MATERIALS SHRINKAGE Russian patent published in 2005 - IPC

FIELD: medicine; medical engineering.

SUBSTANCE: method involves calculating proportions of bound and free composite surfaces and C-factor values. Adjustment coefficients are additionally introduced for taking retention substrate properties in consideration and estimate is found from formula , where CSF is the configuration-substrate factor; S_i is the hard dental tissues; S_j is the composite contact surface; S_k is the metal contact surface; S_m is the free surface area; A is the hard dental tissues retention capability (A=1); B is the composite material retention capability (B=2); C is the metal retention capability (C=3). CSF value growing relative to the C-factor, low adhesion level and increased polymerization stress influence caused by contemporary composite filling materials shrinkage is considered to be the case.

EFFECT: objectively described polymerization shrinkage process; reduced risk of traumatic complications.

1 dwg, 1 tbl