PubMed Health⌕ Search

Biomedical subjects

F Ghisellini

Publications and source records attributed to F Ghisellini.

8 recordsLinked to original sources
PubMed2001

Pure dislocation of the ankle: three case reports and literature review.

Ankle dislocation without fracture is an extremely rare injury. The results of treatment are reported for three patients who had a posteromedial open dislocation, a lateral open dislocation, and a posterior closed dislocation of the ankle. Management consisted of immediate reduction, debridement and capsular suture in the open dislocations, and immobilization with a short leg cast in all patients. At followup no patient had tibiotalar joint instability; a 10 degrees to 15 degrees loss in the range of dorsiflexion was observed in two patients. One patient reported paresthesia in the area of the superficial peroneal nerve. The three patients achieved good long-term functional and radiographic results. Predisposing factors that contribute to the pathogenesis of this lesion are internal malleolus hypoplasia, ligamentous laxity, weakness of the peroneal muscles, and previous ankle sprains. Among the three patients, medial malleolus hypoplasia was present in one patient and previous sprains were seen in the clinical history of another patient.

Adult↗
PubMed1998

Biomechanical behaviour at the distal third of the femur: possible use of a medial metaphyseal plate.

The incidence of fractures in the distal femur is becoming more frequent and they are often associated to complex lesions with potential complications. Operative treatment is mandatory for elderly people and several methods of internal fixation with appropriate implants have been developed, generally approaching the lateral aspect of the femur. An alternative antero-medial access was proposed several years ago but the biomechanical aspects of its application must be debated. The aim of the present study is to establish if adverse biomechanical effects should be expected when the plate is affixed at the medial side of the femur metaphysis, by analysing the strain pattern of a human cadaver femur submitted to loads simulated in different experimental conditions. Application of load resulted, as expected, in tension in the lateral aspect and compression in the medial aspect of the femur diaphysis but it turned more and more toward the anterior aspect and the compression turned toward the posterior aspect when the levels measured changed from proximal to distal. The plate was next to the neutral axis and produced a moderate stress protection effect (approx. 70 per cent). No biomechanical disadvantages have been observed as a result of the plate being apposed at the medial aspect instead of the conventional lateral aspect of the distal femur.

Aged↗
PubMed1996

Quantitative scintigraphic evaluation of total knee arthroplasties: a feasibility study.

For the development and validation of a quantitative approach to the analysis of bone scans after total knee arthroplasty, 39 consecutive patients with 40 prostheses (6 males, 33 females; mean age, 70 years) were scheduled for clinical, radiographic, and scintigraphic examination ranging from 9 to 90 months after surgery. Twenty-seven total knee arthroplasties were considered to be asymptomatic and 13 symptomatic according to the clinical and radiographic findings. Significant differences were found for 99mTc-methylene diphosphonate uptake for femur and tibia and between symptomatic and asymptomatic patients. A reference range was determined for radionuclide uptake in the periprosthetic bone of the 27 asymptomatic total knee arthroplasties; this range was then used to identify loose total knee arthroplasties among the 13 symptomatic knees. With a clinical and radiographic followup performed 1 year after scintigraphy as a standard of comparison, a sensitivity of 88% (7/8) and a specificity of 100% (5/5) was demonstrated. These preliminary results suggest the feasibility of a quantitative approach to the scintigraphic evaluation of total knee arthroplasties after the first postsurgical year.

Aged↗
PubMed1988

Failure of the stem in total hip replacement. A study of aetiology and mechanism of failure in 13 cases.

Thirteen failed stem of Total Hip Replacement were studied: 9 were Charnley THR from an homogeneous series, which gives an incidence of 2.4% of stem fractures with a follow-up of 9-16 years; 4 were Mueller THR. Fatigue fracture of the stem occurred by defective support of the proximal part of the femur, following resorption of the calcar. In all cases reactive tissue to foreign body particles, metal and polyethylene, was found where bone resorption occurred. In Mueller THR wear of the cup produced the large amount of polyethylene particles; in Charnley THR metal particles prevailed and corrosion of the stem is suggested to be the initiating factor.

Aged↗
PubMed1988

Evaluation of reimplant total hip prostheses and resection arthroplasty.

Results of reimplanted total hip prostheses and resection arthroplasty were compared. Using the Iowa hip rating scale, the reimplanted prostheses population was rated higher for function, gait, and absence of deformity, however, the resection arthroplasty population rated better in freedom from pain. Radiographic findings in the reimplanted prostheses population included radiolucent lines around the cement, loosening, and cortex bone stock loss. These findings cause concern for the future of these implants. Repair and remodeling of the bone lesions were observed in resection arthroplasties. It was concluded that if healing of infection is achieved or if resection is performed for mechanical failure, the results may be considered permanent.

Adult↗
PubMedDate not supplied

Silvio Zanoli.

Explore the source record for details and available documents.

History, 20th Century↗