Table 2: Number of activations until fracture and load (Kgf) in the last activation as a function of the expander.

Expander	Number of activations	Load at the last activation
Expander	Mean (SD)	Mean (SD)
MARPE SL	28.40 (4.72)^a	32.28 (4.12)^b
MARPE EX with low extender arms	33.00 (6.40)^a	41.28 (3.05)^a
MARPE EX with intermediate extender arms	37.20 (7.36)^a	29.36 (2.91)^b
MARPE EX with high extender arms	39.00 (9.08)^a	23.37 (2.93)^c
p-value	0.0586	<0.0001

Different superscript letters vertically indicate statistically significant differences (p≤0.05). SD = standard deviation.