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Biomedical subjects

A Capone

Publications and source records attributed to A Capone.

95 records · Page 6Linked to original sources
PubMedDate not supplied

Ganz reinforcement rings in acetabular revision: indications and medium-term results.

Metal reinforcement rings, systems used widely in the past for prosthetic revision surgery, are still effective, in that they allow us to restore the correct hip rotation center and protect the bone grafts used to increase acetabular bone stock. To provide a better definition of the current indications for use of reinforcement rings in acetabular revisions we conducted a retrospective study in a group of 25 patients in whom a Ganz reinforcement ring was used in association with autoclaved cancellous bone grafts. The Ganz ring is made of titanium and it has a lower hook that contributes to the mechanical stability of the implant. Mean age of patients was 72.5 years. Pre-revision acetabular bone defects were divided according to the Paprosky classification system: type 2A: 2 cases; type 2B: 6 cases; type 2C: 6 cases; type 3: 6 cases; type 3B: 5 cases. Clinical and radiographic results were evaluated after a mean follow-up of 4.6 years. Score based on the Harris evaluation form went from a mean preoperative value of 45 points to 92 points after revision. Overall, clinical results were excellent in 9 cases (36%), good in 12 cases (48%), fair in 3 cases (12%), poor in 1 case (4%). Radiographically, we observed a significant reduction (62%) in mean vertical distance of the hip rotation center after revision, that contributed to reduction in hypometria of the limb submitted to surgery, ranging from a mean preoperative value of 2.2 cm to 0.72 cm after surgery. Stability of the implant in time was evaluated based on the Gill criteria. None of the cases required further revision surgery; in 3 cases (12%) with type 3 preoperative defects, the implant was judged to be probably or possibly loosened because of the presence of radiolucent lines.

Aged↗
PubMedDate not supplied

The treatment of severe acetabular osteolysis by bone grafts and cementless techniques.

The authors describe their experience in the treatment of severe acetabular osteolysis using bone grafts and cementless screwed acetabulum. They define the criteria that directed them towards this choice and the surgical method used in relation to bone loss caused by failure of the previous prosthesis. In light of their experience, the advantages and the drawbacks to using a cementless acetabulum in hip reimplantation are described, with particular analysis of the peculiar features of the P.M. acetabulum that, because it is screwed and has a truncated-conical design, permits stabilization of the grafts without the use of further instrumentation, and obtains effective primary stability even when there is discontinuity of the bottom or of the acetabulum.

Acetabulum↗
PubMedDate not supplied

The spacer block technique in revision of total knee arthroplasty with septic loosening.

Five cases of septic loosening of total knee arthroplasty were treated by two-stage revision using a cement mixed with antibiotic. The spacer block was responsible for greater mechanical stability of the joint in the interval between the two stages of the operation, and the association of the antibiotic favored resolution of septic complications, allowing at the same time for systemic antibiotic treatment at doses lower than usual. In all of the cases treated reimplantation was performed in conditions of apparent sterility. The minimum amount of time between the first operation and reimplantation was 3 months, maximum was 5 months. Four to 18 months after reimplantation there was no recurrence of infection. Despite the short follow-up, the technique used appears to constitute a valid solution for septic complications in total knee arthroplasty.

Aged↗
PubMedDate not supplied

Low back pain in athletes: pathogenetic mechanisms and therapy.

A different and more in-depth approach is needed when treating an athlete suffering from low back pain than is the case when the same pathology affects a sedentary subject. In fact, pain symptoms may frequently arise only when there is functional overloading, while pain is absent or not disabling in normal daily activity. Treatment is also different for the athlete: complete functional recovery must take place in as short a period of time as possible, and it will often have to be finalized in relation to sports-related commitments. A group of 60 professional athletes were evaluated in order to examine the incidence and the features of lumbar pain. Attention was particularly paid to a functional evaluation of the spine by means of an accurate clinical examination and the use of the Metrecom system. The data obtained confirm the importance of changes in posture and in vertebral dynamics when the pain symptom occurs.

Adolescent↗