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Comparison between component designs with different femoral head size in metal-on-metal total hip arthroplasty; multicenter randomized prospective study.

ABSTRACT: BACKGROUNDS/AIMS:We prospectively studied 78 prostheses with conventional femoral head and 86 prostheses with large head (Magnum) of metal-on-metal total hip arthroplasty (MoM THA) with two years follow-up. METHODS:Clinical outcomes and blood metal ion were evaluated. RESULTS:There were no significant differences of clinical outcomes between groups. 1.17 ± 1.01 ?g/L of blood cobalt ion in Magnum was significantly lower than 1.99 ± 2.34 ?g/L in conventional group. No dislocation was observed in Magnum while one dislocation in conventional group. MoM THA with large head is useful if the implants are positioned in appropriate alignment, however longer follow-up will be necessary. CLINICAL TRIAL REGISTRATION:NCT01010763 (registered on ClinicalTrials.gov).

SUBMITTER: Ando W

PROVIDER: S-EPMC4601987 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature

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Comparison between component designs with different femoral head size in metal-on-metal total hip arthroplasty; multicenter randomized prospective study.

Ando Wataru W Yamamoto Kengo K Atsumi Takashi T Tamaoki Satoshi S Oinuma Kazuhiro K Shiratsuchi Hideaki H Tokunaga Hirohiko H Inaba Yutaka Y Kobayashi Naomi N Aihara Masaharu M Ohzono Kenji K

Journal of orthopaedics 20150610 4

<h4>Backgrounds/aims</h4>We prospectively studied 78 prostheses with conventional femoral head and 86 prostheses with large head (Magnum) of metal-on-metal total hip arthroplasty (MoM THA) with two years follow-up.<h4>Methods</h4>Clinical outcomes and blood metal ion were evaluated.<h4>Results</h4>There were no significant differences of clinical outcomes between groups. 1.17 ± 1.01 μg/L of blood cobalt ion in Magnum was significantly lower than 1.99 ± 2.34 μg/L in conventional group. No disloca ...[more]

PMID: 26566324

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Project description:BACKGROUND:The supercapsular percutaneously-assisted total hip arthroplasty (SuperPath) was proposed to be minimally invasive and tissue sparing with possible superior postoperative outcomes to traditional approaches of total hip arthroplasty (THA). Here, we compared the short-term outcomes of staged THA with the SuperPath or through posterolateral approach (PLA) for bilateral osteonecrosis of the femoral head (ONFH). METHODS:Patients with bilateral late-stage ONFH were prospectively recruited from our department from March 2017 to March 2018. Staged bilateral THAs with one side SuperPath and the other side PLA were performed consecutively in the same patients with right and left hips alternating within approaches. The average time interval between the staged THAs was 3?months. Perioperative status (operation time, incision length, intraoperative blood loss, soft tissue damage, and length of hospital stay) and postoperative function (range of motion, pain, and hip function) were recorded and compared between the SuperPath and PLA approaches within 12-month postoperatively. RESULTS:Four male patients (age, 51.00?±?4.54; BMI, 21.49?±?1.73) with bilateral alcohol-induced ONFH (Ficat III/IV) were followed up over 12?months postoperatively. Compared with the PLA, the SuperPath yielded shorter incision length (7.62 vs. 11.12?cm), longer operation time (103.25 vs. 66.50?min), more blood loss (1108.50 vs. 843.50?ml), deficient abduction angle of the acetabular cup (38.75° vs. 44.50°), and inferior early-term hip function (Harris hip score, 72.50 vs. 83.25) at 12-month postoperatively. Soft tissue damage, length of hospital stay, postoperative pain, postoperative range of motion, and 12-month patient satisfaction were comparable between both approaches. CONCLUSION:The SuperPath may be a minimally invasive technique but the present study shows less favorable short-term outcomes than PLA for total hip arthroplasty in osteonecrosis of the femoral head. More investigations are required to provide convincing favorable evidences of the SuperPath over other traditional THA approaches. TRIAL REGISTRATION INFORMATION:The trial was retrospectively registered in https://www.researchregistry.com (No. Researchregistry4993) on July 04, 2019. The first participant was enrolled on March 13, 2017.

Dataset Information

Comparison between component designs with different femoral head size in metal-on-metal total hip arthroplasty; multicenter randomized prospective study.

Publications

Comparison between component designs with different femoral head size in metal-on-metal total hip arthroplasty; multicenter randomized prospective study.

Similar Datasets

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