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Total Hip Arthroplasty Using the S-ROM-A Prosthesis for Anatomically Difficult Asian Patients.

Hozumi A, Kobayashi K, Tsuru N, Miyamoto C, Maeda J, Chiba K, Goto H, Osaki M - Biomed Res Int (2015)

Bottom Line: Results.The mean JOA score improved from 46 points preoperatively to 80 points at final follow-up.On radiological evaluation of the fixation of the implants according to the Engh classification, 92 (97%) hips were classified as "bone ingrown fixation." Conclusion.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthopaedic Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.

ABSTRACT
Background. The S-ROM-A prosthesis has been designed for the Asian proximal femur with a small deformed shape and narrow canal. In this study, the clinical and radiological results using the S-ROM-A prosthesis for Japanese patients with severe deformity due to dysplasia and excessive posterior pelvic tilt were examined. Methods. 94 hips were followed up for a mean of 55 months, with a mean age at surgery of 61 years. The primary diagnoses were 94 coxarthritis cases, including 51 dysplasia and 37 primary OA, 1 avascular necrosis, 2 traumatic arthritis, and 3 Perthes disease. Thirty-one hips had been treated with osteotomy of the hip joints. Preoperative intramedullary canal shapes were stovepipe in 23 hips, normal in 51 hips, and champagne-flute in 5 hips. The maximum pelvic inclination angle was 56°. Results. The mean JOA score improved from 46 points preoperatively to 80 points at final follow-up. On radiological evaluation of the fixation of the implants according to the Engh classification, 92 (97%) hips were classified as "bone ingrown fixation." Conclusion. In primary THA, using the S-ROM-A prosthesis for Asian patients with proximal femoral deformity, even after osteotomy and with posterior pelvic tilt, provided good short- to midterm results.

No MeSH data available.


Related in: MedlinePlus

Adjustment of the rotation angle of the stem against the sleeve.
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Related In: Results  -  Collection


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fig1: Adjustment of the rotation angle of the stem against the sleeve.

Mentions: Overall, femoral component version was changed in 67 hips (71%). The rotational angle of the stem ranged from 60° retroversion to 35° anteversion against the sleeve. The stem rotational angle against the sleeve according to preoperative diagnoses is shown in Figure 1.


Total Hip Arthroplasty Using the S-ROM-A Prosthesis for Anatomically Difficult Asian Patients.

Hozumi A, Kobayashi K, Tsuru N, Miyamoto C, Maeda J, Chiba K, Goto H, Osaki M - Biomed Res Int (2015)

Adjustment of the rotation angle of the stem against the sleeve.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4637046&req=5

fig1: Adjustment of the rotation angle of the stem against the sleeve.
Mentions: Overall, femoral component version was changed in 67 hips (71%). The rotational angle of the stem ranged from 60° retroversion to 35° anteversion against the sleeve. The stem rotational angle against the sleeve according to preoperative diagnoses is shown in Figure 1.

Bottom Line: Results.The mean JOA score improved from 46 points preoperatively to 80 points at final follow-up.On radiological evaluation of the fixation of the implants according to the Engh classification, 92 (97%) hips were classified as "bone ingrown fixation." Conclusion.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthopaedic Surgery, Nagasaki University Hospital, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.

ABSTRACT
Background. The S-ROM-A prosthesis has been designed for the Asian proximal femur with a small deformed shape and narrow canal. In this study, the clinical and radiological results using the S-ROM-A prosthesis for Japanese patients with severe deformity due to dysplasia and excessive posterior pelvic tilt were examined. Methods. 94 hips were followed up for a mean of 55 months, with a mean age at surgery of 61 years. The primary diagnoses were 94 coxarthritis cases, including 51 dysplasia and 37 primary OA, 1 avascular necrosis, 2 traumatic arthritis, and 3 Perthes disease. Thirty-one hips had been treated with osteotomy of the hip joints. Preoperative intramedullary canal shapes were stovepipe in 23 hips, normal in 51 hips, and champagne-flute in 5 hips. The maximum pelvic inclination angle was 56°. Results. The mean JOA score improved from 46 points preoperatively to 80 points at final follow-up. On radiological evaluation of the fixation of the implants according to the Engh classification, 92 (97%) hips were classified as "bone ingrown fixation." Conclusion. In primary THA, using the S-ROM-A prosthesis for Asian patients with proximal femoral deformity, even after osteotomy and with posterior pelvic tilt, provided good short- to midterm results.

No MeSH data available.


Related in: MedlinePlus