Table 2.

Grading assessment for screw position of each patient.

Patient	Group	Screw (n)	Grade of screw
			A	B	C
1	FHG	4	4	0	0
2	FHG	6	4	2	0
3	RAG	4	3	1	0
4	RAG	6	6	0	0
5	RAG	4	3	1	0
6	FHG	4	4	0	0
7	FHG	6	5	1	0
8	FHG	4	2	2	0
9	FHG	4	3	1	0
10	RAG	4	4	0	0
11	RAG	4	4	0	0
12	FHG	4	1	2	1
13	RAG	4	3	1	0
14	RAG	6	6	0	0
15	FHG	4	3	1	0
16	FHG	8	8	0	0
17	FHG	6	5	1	0

RAG = “Orthbot”-assisted group; FHG = free-hand technique group (conventional group).

No Grade D was evaluated in both the two groups.