Promising short-term clinical results of the cementless Oxford phase III medial unicondylar knee prosthesis

Table 1 Patient characteristics

	Cementedn = 53	Cementlessn = 46	P value
Age (yr)	64.6 ± 8.2	62.2 ± 6.7	0.12
Sex			0.471
Male	21 (39.6%)	21 (45.7%)
Female	32 (60.4%)	25 (54.3%)
ASA			0.497
1	15 (28.3%)	10 (21.7%)
2	30 (56.6%)	31 (67.4%)
3	8 (15.1%)	5 (10.9%)
BMI (kg/m2)	27.7 ± 4.1	29.0 ± 4.7	0.17
Follow-up (mo)	20.5 ± 3.9	18.3 ± 4.5	0.02
Ahlbäck grade medial joint space			0.442
0 (> 3 mm)	0 (0%)	1 (2.2%)
1 (< 3 mm)	41 (77.4%)	33 (71.7%)
2 (Obliteration)	10 (18.9%)	12 (26.1%)
3 (Attrition < 5 mm)	2 (3.8%)	0
Ahlbäck grade lateral joint space			0.129
0 (> 3 mm)	53 (100%)	45 (95.7%)
1 (< 3 mm)	0	2 (4.3%)
2 (Obliteration)	0	0
3 (Attrition < 5 mm)	0	0
Ahlbäck grade patellofemoral joint space			0.139
0 (> 3 mm)	29 (54.7%)	18 (39.1%)
1 (< 3 mm)	23 (43.4%)	28 (60.9%)
2 (Obliteration)	1 (1.9%)	0
3 (Attrition < 5 mm)	0	0

BMI: Body mass index.

Table 2 Reoperations, revisions and outcome

Type	Fixation	Operation performed	Indication	Survival(mo)	Gender	Age(yr)	ASA	BMIkg/m2	OKS	AKSSO/S
Revision	C	TKP PS 5/5/15 mm	Malrotation tibial component	16	Male	50	1	30.0	-	-
Redo	CL	Nettoyage PE 5 to 8	Subluxation PE	19	Male	50	1	30.0	48	100/100
Revision	C	TKP elsewhere	Aseptic loosening tibial component	20	Female	78	1	27.2	-	-
Redo	C	Nettoyage PE 5 to 6	PE luxation 90 degrees	21	Male	60	2	32.8	46	100/100
Redo	CL	Nettoyage PE 5 to 7	Impingement	21	Male	55	3	32.4	37	80/90
Redo	CL	Nettoyage PE 4 to 7	Impingement	21	Male	64	2	31.7	42	90/100
Redo	C	Nettoyage PE 4 to 6	Subluxation PE	22	Male	51	2	28.4	48	95/100
Redo	CL	Planned	Impingement	23	Male	55	2	26.6	-	-
Redo	CL	Planned	Impingement	26	Female	62	2	25.8	-	-
Revision	C	ACS 5/5/12, 5 mm	Progression of OA lateral/PF	27	Male	51	2	36.3	-	-

BMI: Body mass index; OA: Osteoarthritis; C: Cemented; CL: Cementless; PE: Polyethylene meniscus; OKS: Oxford knee score; AKSS O/S: American knee society score objective score/subjective score.