After 13.5 years in vivo a 2-0 Terylene(R) frontalis loop was excised
because of an insufficiency. Histology showed a persisting giant cell
reaction while lymphocytes were almost totally absent. The fibrils of
thr suture seemed to he intact. However, they were separated by ingrow
ing connective tissue which, on theoretical grounds, should improve th
e function of the frontal muscle on the upper eyelid. Therefore, insuf
ficiency of the loop was probably caused by the (subclinical) foreign
body reaction or the long-lasting mechanical stress leading to tissue
damage.