Preliminary analysis on the MD-4(r) plasma-sprayed titanium acetabular component

Loures, Elmano de Araújo; Simoni, Leandro Furtado; Leite, Isabel Cristina Gonçalves; Loures, Daniel Naya; Loures, Clarice Naya

doi:10.1016/j.rboe.2015.03.003

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Original Article • Rev. bras. ortop. 50 (2) • Mar-Apr 2015 • https://doi.org/10.1016/j.rboe.2015.03.003 copy

Preliminary analysis on the MD-4(r) plasma-sprayed titanium acetabular component^☆ ☆ Work developed at the University Hospital, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil.

Authorship SCIMAGO INSTITUTIONS RANKINGS

OBJECTIVES:

To evaluate the short-term performance of a type of implant manufactured in Brazil.

METHODS:

This study analyzed a cohort of 60 patients who underwent implantation of MD-4^(r) acetabular components during primary hip arthroplasty procedures performed between January 1, 2010, and August 1, 2012. The patients were studied retrospectively with regard to clinical behavior, stability and radiological osseointegration. The patients were followed up for a minimum of 12 months and a maximum of 42 months (mean: 27) and were evaluated by means of the Harris Hip Score, SF-36 questionnaire and serial conventional radiographs.

RESULTS:

All the components were radiologically stable, without evidence of migration or progressive radiolucency lines. On average, the Harris Hip Score evolved from 36.1 to 92.1 (p < 0.001) and the SF-36 showed significant increases in all its domains (p < 0.001). No differences were observed among patients with osteoarthrosis, osteonecrosis, hip dysplasia or other conditions.

CONCLUSIONS:

The short-term results showed clinical and radiological signs of stability and osseointegration of the implants, which may represent a predictive factor regarding medium-term survival of this acetabular component.

Osseointegration; Hip arthroplasty; Hip prosthesis

Variables	Before operation	After operation	p
	Mean (SD)	Mean (SD)
SF-36
Functional capacity	12.9 (15.1)	52.6 (27.7)	<0.010
Limitation due to physical aspects	7.9 (19.9)	47.1 (41.0)	<0.001
Pain	23.6 (18.5)	62.3 (25.7)	<0.002
General state of health	55.9 (23.1)	71.0 (22.5)	<0.001
Vitality	41.6 (23.1)	69.1 (21.8)	<0.001
Social aspects	41.8 (24.2)	73.9 (25.1)	<0.001
Emotional aspects	22.9 (35.0)	66.7 (37.0)	<0.001
Mental health	54.6 (26.8)	80.3 (17.8)	<0.001
HHS	36.4 (15.1)	92.3 (5.7)	<0.001

Patient	Age	Gender	Side	Follow-up (months)	Diagnosis	HHSi	HHSf	Relevant data
1	60	F	Left	42	Dysplasia	30.1	98.9
2	43	M	Right	42	Femoroacetabular impingement	18.5	92.0
3	52	M	Left	42	Primary osteoarthrosis	55.3	88.4
4	45	M	Right	42	Osteonecrosis	44.7	97.9
5	26	M	Right	41	Osteonecrosis	32.0	100.0
6	62	F	Right	40	Primary osteoarthrosis	44.5	99.9
7	68	F	Right	40	Primary osteoarthrosis	53.9	84.0
8	64	M	Right	40	Dysplasia	5.7	95.0
9	57	M	Right	40	Primary osteoarthrosis	52.9	84.8
10	57	F	Left	40	Rheumatoid arthritis	13.3	97.9
11	48	M	Left	40	Primary osteoarthrosis	44.4	90.7	Ang. >50°
12	51	M	Left	40	Osteonecrosis	47.2	97.9
13	63	F	Right	40	Primary osteoarthrosis	48.4	99.4
14	64	F	Right	39	Primary osteoarthrosis	38.8	87.7	Ang. >50°
15	52	M	Right	38	Primary osteoarthrosis	36.0	88.8
16	60	M	Left	37	Sequelae of fractures	25.8	93.0
17	53	M	Right	37	Primary osteoarthrosis	54.3	89.9	Ang. >50°
18	73	F	Right	37	Primary osteoarthrosis	25.8	84.8	Neuropraxia of sciatic nerve
19	45	M	Left	37	Femoroacetabular impingement	56.6	97.0
20	42	F	Left	37	Dysplasia	42.7	90.0
21	54	F	Right	37	Primary osteoarthrosis	52.0	92.0
22	62	F	Left	37	Primary osteoarthrosis	25.4	80.8
23	42	M	Right	37	Osteonecrosis	31.6	87.1
24	52	F	Right	36	Dysplasia	5.4	88.5	Superficial infection
25	56	M	Right	36	Primary osteoarthrosis	20.8	100.0
26	62	M	Right	35	Osteonecrosis	55.4	100.0
27	55	M	Right	35	Osteonecrosis	25.8	92.9
28	72	F	Left	35	Primary osteoarthrosis	44.4	84.9
29	45	M	Left	34	Osteonecrosis	19.1	94.0
30	78	F	Left	34	Sequelae of fractures	45.9	88.5	Trochanter frag.
31	58	M	Right	33	Osteonecrosis	22.8	100.0
32	58	F	Right	33	Primary osteoarthrosis	23.2	91.2
33	74	F	Right	33	Rheumatoid arthritis	31.9	90.4	Trochanter frag.
34	40	M	Left	33	Primary osteoarthrosis	38.7	84.0
35	72	M	Right	32	Dysplasia	60.3	100.0
36	62	F	Left	29	Primary osteoarthrosis	30.3	98.5
37	46	M	Left	29	Avascular necrosis	55.4	92.3
38	57	M	Right	28	Avascular necrosis	44.8	88.0
39	58	M	Right	28	Primary osteoarthrosis	32.0	97.5
40	67	F	Left	27	Primary osteoarthrosis	45.2	99.8
41	71	M	Left	26	Sequelae of fractures	53.6	100.0
42	62	F	Right	26	Primary osteoarthrosis	14.3	84.5
43	65	F	Right	23	Primary osteoarthrosis	43.7	95.0
44	54	F	Left	22	Primary osteoarthrosis	38.5	85.0
45	78	M	Left	21	Primary osteoarthrosis	56.3	98.0
46	64	F	Right	21	Dysplasia	25.6	90.5
47	54	M	Left	20	Primary osteoarthrosis	48.5	97.9
48	43	M	Right	20	Dysplasia	56.0	99.4
49	53	F	Right	18	Primary osteoarthrosis	33.7	87.5
50	54	M	Right	18	Avascular necrosis	47.8	88.7
51	63	F	Right	17	Primary osteoarthrosis	35.9	93.2
52	63	F	Right	17	Primary osteoarthrosis	40.6	82.0
53	66	M	Right	16	Femoroacetabular impingement	49.7	96.0
54	68	M	Right	16	Primary osteoarthrosis	31.6	85.6
55	44	M	Left	16	Dysplasia	52.0	89.4
56	32	F	Right	16	Primary osteoarthrosis	20.7	90.5
57	66	F	Right	16	Avascular necrosis	42.6	95.5
59	32	F	Left	15	Avascular necrosis	52.0	100.0
59	45	M	Right	12	Femoroacetabular impingement	23.4	81.4	DVT
60	55	F	Right	12	Primary osteoarthrosis	45.6	99.5

Sociedade Brasileira de Ortopedia e Traumatologia Al. Lorena, 427 14º andar, 01424-000 São Paulo - SP - Brasil, Tel.: 55 11 2137-5400 - São Paulo - SP - Brazil
E-mail: rbo@sbot.org.br

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[1] * Corresponding author. E-mail: loures.elmano@oi.com.br (D.N. Loures).

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Preliminary analysis on the MD-4(r) plasma-sprayed titanium acetabular component☆ ☆ Work developed at the University Hospital, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil.

OBJECTIVES:

METHODS:

RESULTS:

CONCLUSIONS:

Preliminary analysis on the MD-4(r) plasma-sprayed titanium acetabular component^☆ ☆ Work developed at the University Hospital, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil.