Deviation of cup alignment from target angle during press-fit insertion

Figures & data

Table 1. Demographics data of the patients.

Parameters	Values
No. of hips	124
Gender (male/female)	58/66
Mean age (years) (range)	60.2 (25–93)
Right-side/left-side operations (cases)	62/62
Etiology (cases) (%)
Femoral neck fracture	65 (52.4%)
Osteonecrosis of the femoral head (ONFH)	47 (38%)
Developmental dysplasia of the hip (DDH)	6 (4.8%)
Posttraumatic	6 (4.8%)
Mean cup size (mm)	52 (48–64)
Supplemental screw (cases) (%)
No screw	32 (25.8%)
One screw	64 (51.6%)
Two screws	26 (21%)
Three screws	2 (1.6%)

Table 2. Details of Deviated Inclination Angles (DIA).

Deviated Inclination Angles (DIA)	Values
No. (cases) (%)	114 (91.9%)
Mean DIA (degrees) (range, SD)	2.65 (0–8, 1.66)
Decreased DIA (cases) (%)	107 (86.3%)
Decreased 5^° or more (cases) (%)	12 (9.7%)
Increased DIA (cases) (%)	7 (5.6%)
Increased 5^° or more (cases) (%)	2 (1.6%)

Table 3. Details of Deviated Anteversion Angles (DAA).

Deviated Anteversion Angles (DAA)	Values
No. (cases) (%)	103 (83.1%)
Mean DAA (degree) (range, SD)	2.3 (0–14, 2.3)
Increased DAA (cases) (%)	78 (62.9%)
Increased 5^° or more (cases) (%)	11 (8.9%)
Decreased DAA (cases) (%)	25 (20.2%)
Decreased 5^° or more (cases) (%)	4 (3.2%)

Table 4. Comparison between male and female, right-sided and left-sided operations.

Parameters	Male degree (range)	Female degree (range)	p-Value	Right-side degree (range)	Left-side degree (range)	p-Value
Mean DIA	3 (0–8)	2 (0–8)	.012	3 (0–7)	3 (0–8)	.987
Mean DAA	2 (0–10)	2 (0–14)	.41	1.5 (0–6)	2 (0–14)	.373