Minimum Lateral Bone Coverage Required for Securing Fixation of Cementless Acetabular Components in Hip Dysplasia

Joint Authors

Nakashima, Yasuharu
Fujii, Masanori
Nakamura, Tetsuro
Ito, Yoshihiro
Hara, Toshihiko

Source

BioMed Research International

Issue

Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-7, 7 p.

Publisher

Hindawi Publishing Corporation

Publication Date

2017-02-19

Country of Publication

Egypt

No. of Pages

7

Main Subjects

Medicine

Abstract EN

Objectives.

To determine the minimum lateral bone coverage required for securing stable fixation of the porous-coated acetabular components (cups) in hip dysplasia.

Methods.

In total, 215 primary total hip arthroplasties in 199 patients were reviewed.

The average follow-up period was 49 months (range: 24–77 months).

The lateral bone coverage of the cups was assessed by determining the cup center-edge (cup-CE) angle and the bone coverage index (BCI) from anteroposterior pelvic radiographs.

Further, cup fixation was determined using the modified DeLee and Charnley classification system.

Results.

All cups were judged to show stable fixation by bone ingrowth.

The cup-CE angle was less than 0° in 7 hips (3.3%) and the minimum cup-CE angle was −9.2° (BCI: 48.8%).

Thin radiolucent lines were observed in 5 hips (2.3%), which were not associated with decreased lateral bone coverage.

Loosening, osteolysis, dislocation, or revision was not observed in any of the cases during the follow-up period.

Conclusion.

A cup-CE angle greater than −10° (BCI > 50%) was acceptable for stable bony fixation of the cup.

Considering possible errors in manual implantation, we recommend that the cup position be planned such that the cup-CE angle is greater than 0° (BCI > 60%).

American Psychological Association (APA)

Fujii, Masanori& Nakashima, Yasuharu& Nakamura, Tetsuro& Ito, Yoshihiro& Hara, Toshihiko. 2017. Minimum Lateral Bone Coverage Required for Securing Fixation of Cementless Acetabular Components in Hip Dysplasia. BioMed Research International،Vol. 2017, no. 2017, pp.1-7.
https://search.emarefa.net/detail/BIM-1137358

Modern Language Association (MLA)

Fujii, Masanori…[et al.]. Minimum Lateral Bone Coverage Required for Securing Fixation of Cementless Acetabular Components in Hip Dysplasia. BioMed Research International No. 2017 (2017), pp.1-7.
https://search.emarefa.net/detail/BIM-1137358

American Medical Association (AMA)

Fujii, Masanori& Nakashima, Yasuharu& Nakamura, Tetsuro& Ito, Yoshihiro& Hara, Toshihiko. Minimum Lateral Bone Coverage Required for Securing Fixation of Cementless Acetabular Components in Hip Dysplasia. BioMed Research International. 2017. Vol. 2017, no. 2017, pp.1-7.
https://search.emarefa.net/detail/BIM-1137358

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references

Record ID

BIM-1137358