Table 1.

Screw placement distributions

Level	T1	T2	T3	T4	T5	T6	Total
Number of screws	10	10	14	4	10	12	60
Out	0	1	0	1	1	3	6
Questionable	1	0	0	0	0	0	1
Accuracy (%)	90	90	100	75	90	75	88.3