RESUMO
BACKGROUND: Acetabular bone loss in revision total hip arthroplasty can be very challenging even for fellowship-trained surgeons. Although it is uncommon, massive anterosuperior medial defects may be encountered, but treatment options have been limited and better ones are needed. QUESTIONS/PURPOSES: The primary purpose of this case series is to describe a novel surgical treatment, which we call the dome technique, that can be used to address these challenging defects. The dome technique allows for the systematic reconstruction of massive anterosuperior medial defects of the acetabulum. We sought to illustrate the utility of this procedure in three patients with failed acetabular components and massive anterosuperior medial defects. METHODS: We undertook a retrospective chart review of three patients who had had Paprosky 3B bone defects and undergone revision total hip arthroplasty by the senior author between 2013 and 2016 using the dome technique. The procedure involved the use of tantalum metal augments pieced together to fill the medial defect and recreate the column support needed for jumbo cup placement. The dome technique is unusual because it allows for intra-operative customization to obtain the proper fit. RESULTS: At a mean of 23.6 months' follow-up (range, 10 to 37 months), all patients had good functional outcomes; none was in need of further revision. CONCLUSIONS: In three patients, the dome technique allowed for the anterosuperior column to be recreated by piecing together two porous metal augments to fill the medial bony void and create a stable column for a jumbo cup to be press fit. By recreating the deficient anterosuperior medial bone, the acetabulum can be downsized in a stepwise manner (with further surgery) and reconstructed in a stable fashion. This novel procedure is a unique option for the treatment of this challenging problem.
RESUMO
BACKGROUND: Pediatric femoral shaft fractures are common injuries that have seen a trend toward surgical stabilization. Traditionally these fractures have been stabilized with flexible intramedullary nails performed through a 2-incision technique. We proposed that a single incision technique would offer equivalent outcomes with the potential for improved cosmesis and a reduced infection risk. METHODS: A retrospective review was performed of 112 consecutive cases of pediatric femoral shaft fractures, 66 cases were excluded, leaving 23 cases utilizing the single incision technique and 23 utilizing the standard 2-incision technique. Electronic medical records were then reviewed for demographic information, and a PAC system was employed to classify the fractures according to the AO classification and determine the time to fracture union. RESULTS: No significant difference was found in fracture healing times with a mean union time of 62.4 and 50.3 days in the single and double incision groups, respectively (P=0.38). One complication of superficial infection was noted in the 2-incision group; however, this was not statistically significant, and no malunions or nonunions were detected in either group. CONCLUSIONS: A single incision technique for intramedullary stabilization of pediatric femoral shaft fractures is a viable option with an equivalent time to fracture union and no observed difference in the complication rate. Furthermore, the technique may offer benefits with regard to infection risk and cosmesis.
