All these parameters show better results for the Type B packaging
than for Type A packages. One reason for this is the laterally placed
notch, which provides more space for the fingers and thus allows a
better grip on the packaging. Patients can therefore use the key
grip: greater surface contact between the fingers and the packaging
material allows more force to be applied (Marks et al., 2012; Schreib
and Liebmann, 2011). This notch also facilitates the separation of
the lower and upper tab, which is especially helpful for patients
with finger deformities and impaired sensation. The tear tab is