Taper-wedge stem suitable for anterior approach total hip arthroplasty: Adequate biomechanical reconstruction parameters and excellent clinical outcome at mid-term follow-up

Table 1 Demographic and clinical data of the 144 hips included in the study

Demographic and clinical data	n = 144
Male/female, n (%)	70 (49)/74 (51)
Right hip/left hip, n (%)	83 (58)/61 (42)
Age avg. (range)	68.6 (43-88)
BMI avg. (range)	26.3 (17.5-39.8)
Diagnosis primary OA, n (%)	135 (94)
AVN, n (%)	7 (5)
Post-traumatic OA, n (%)	2 (1)
ASA, n (%)
1	9 (6)
2	89 (62)
3	44 (30)
4	2 (1)
CCI, n (%)
0	6 (4)
1-2	39 (27)
≥ 3	99 (69)
Charnley classification, n (%)
A	79 (54.9)
B	33 (22.9)
BB	28 (19.4)
C	4 (2.8)

BMI: Body mass index; AVN: Avascular necrosis; ASA: American Society of Anesthesiologists; OA: Osteoarthritis; CCI: Charlson comorbidity index.

Table 2 Data of the six patients with complications

Patient, n (age)	Gender	Charnely	Complications	Grade[13]	HHS	HOOS	Remarks
12 (50)	F	A	2-wound complication	2	93	89
53 (77)	M	B2	9-PJI	3	85	52	Two stage procedure with resolution
55 (63)	M	A	1-bleeding	3	100	96	Hematoma that required surgical drainage
115 (55)	M	B1	10-heterotopic calcification	3	93	84
139 (69)	F	B1	2-wound complication	3	79	78	Surgical debridement, no patogens, healed in 3 wk
141 (44)	F	B1	2-wound complication	2	100	96

HHS: Harris Hip Score; HOOS: Hip disability and Osteoarthritis Outcome Score; F: Female; M: Male.