Acetabular wall deficiency in primary and secondary total hip replacement

Reconstructing acetabular wall deficiencies remains a complex challenge in hip replacement surgery. Prior research has shown that acetabular reconstruction outcomes vary based on patient age, lesion type, and graft material. However, this gap motivated a detailed evaluation of long-term results following different reconstructive techniques. No prior work had resolved how specific graft types and surgical approaches influence functional outcomes. Established knowledge includes the use of autogenous and allogeneic grafts, but uncertainty remained about optimal methods for intrapelvic protrusions. This paper's contribution lies in analyzing 38 cases with follow-up data spanning up to 8 years. The study addresses a gap in understanding how reconstruction techniques affect Merle d'Aubigne-Postel and Gruen ratings. By examining both primary and secondary hip replacements, it provides insights into the effectiveness of various surgical strategies. That uncertainty drove the need to assess outcomes based on graft type, patient age, and surgical complexity.

The aim of this study was to evaluate the outcomes of acetabular wall reconstruction in primary and secondary total hip replacements. It focused on the effectiveness of different reconstructive techniques and materials. The specific problem addressed was the technical difficulty of reconstructing intrapelvic protrusions. The motivation stemmed from the high risk associated with these procedures, including vascular and organ threats. The study sought to determine which methods yielded the best functional scores. It also aimed to identify factors influencing successful bone graft healing. The researchers wanted to assess the role of patient age in selecting cemented versus cementless cups. Additionally, the study aimed to highlight the importance of thorough preoperative imaging and surgical planning.

The study analyzed 38 cases of acetabular wall reconstruction following primary and secondary hip replacements. Outcomes were assessed using Merle d'Aubigne-Postel and Gruen ratings after follow-ups ranging from 1 to 8 years. Reconstruction techniques included cemented Weller's cups, cementless Parhoffer-Mönch's or Mittelmeier's cups. The choice of implant depended on patient age and lesion characteristics. In dysplastic hips, massive autogenous cortical bone grafts were used for anterior wall and roof reconstruction. For Otto-Chrobak disease and protrusions, cancellous auto- or allogeneous grafts were applied. Preoperative imaging included CT scans and angiography of the external iliac artery and vein. The surgical approach and graft material were tailored to individual patient needs.

The study reported that 16 cases were rated very good, 11 good, 7 fair, and 4 poor according to the Merle d'Aubigne-Postel and Gruen ratings. Successful outcomes were observed with both cemented and cementless cups, depending on patient age and lesion type. In dysplastic hips, massive cortical bone grafts provided stable reconstruction. Cancellous grafts healed effectively in Otto-Chrobak disease and protrusions. Intrapelvic protrusion cases posed the highest technical difficulty. These reconstructions required precise surgical planning and experienced surgeons. The use of cortico-cancellous bone grafts improved healing outcomes. Weight-bearing restrictions up to 5 months were necessary for optimal recovery.

The authors propose that acetabular reconstruction outcomes depend on patient-specific factors and surgical technique. They suggest that cemented cups are suitable for older patients, while cementless cups are better for younger patients. The use of autogenous cortical grafts in dysplastic hips yielded favorable results. Cancellous grafts proved effective in Otto-Chrobak disease and protrusions. The authors emphasize the importance of thorough preoperative imaging, including CT and angiography. They note that intrapelvic protrusion reconstructions require experienced surgeons and precise planning. Weight-bearing restrictions are essential for successful recovery. The authors suggest that in elderly patients, a Girdlestone pseudarthrosis may be a viable alternative to full reconstruction.