Biomedical subjects

M De Zerbi

Publications and source records attributed to M De Zerbi.

6 recordsLinked to original sources

PubMedDate not supplied

Functional evaluation in total hip replacement patients.

An evaluation of total hip replacement patients requires objective criteria that allow for the measurement of any changes in the biomechanics of the prosthesis and the effects of these changes on clinical findings. An evaluation of loading and joint movement during walking in these patients has been dealt with by many authors. In this study 15 patients who had undergone total hip replacement for coxarthrosis primary or secondary to congenital dysplasia were examined by kinematic and kinetic gait analysis, clinical evaluation, and radiographic evaluation of the position of the neocenter of prosthetic joint rotation. The patients with prostheses in congenital dysplasia presented with a pattern of walking that was significantly modified. In agreement with what is reported in the literature proximal positioning had less influence on gait parameters as compared to lateral dislocation. Furthermore, changes in positioning observed did not seem to have negative effects on joint loading, measured indirectly by the calculation of joint moments.

Adult↗

PubMedDate not supplied

The Epibloc system for the treatment of wrist fractures.

The current prospective study was conducted to verify the results obtained in a heterogeneous group of 50 displaced fractures of the wrist treated with the Epibloc system. This method is simple and rapid to use and it does not require plaster. The results obtained are very satisfactory (good and excellent 91.6%) in AO type A2 and A3 fractures and in type C1 fractures (92.8%) and in C2 fractures (88.3%); in fractures with multiple fragments and compromise of the joint surface (C3) the results were not very significant because of the small number of lesions treated (4 cases), but they do not seem to differ very much from what was obtained by other authors when more complicated methods were used. The results were very unsatisfactory in type B fractures (Goyrand); it is our belief that this method is not indicated for lesions such as these, because of the intrinsic difficulty in monitoring dislocation of the volar metaepiphyseal fragment.

Adult↗

PubMedDate not supplied

Infection therapy in cementless T.H.A.

Reimplantation (when possible) represents today the method of choice when dealing with and attempting to resolve cases of deep infection in total hip arthroplasty. In recent years we have, however, had the chance to treat some cases of infection in cementless arthroplasty (without loosening) by conservative treatment: surgical debridement and specific antibiotic therapy (2 cases), or medical therapy alone (1 case), both associated with immobilization in a plaster cast for 2-3 weeks. The long-term results proved to be quite encouraging: none of the 3 patients treated conservatively showed (after 5-6 years) clinical-radiographic signs of recurrence of the infection.

Adult↗

PubMedDate not supplied

Failed back syndromes: opinions and personal experiences.

The authors consider poor results in lumbar disc surgery to be commonly caused by the following conditions: 1) recurrence of the hernia; 2) postoperative instability; 3) scarring entrapment of the spinal nerve roots; 4) coexisting local or general pathology; 5) arachnoiditis; 6) psychological causes and those where insurance is involved. In particular patients with insurance-related motivations or those affected with depressive syndromes are frequently observed among those submitted to lumbar surgery. The only indications for surgery include recurrence of disc herniation and postoperative instability. In any of the other situations further surgery often results in worsening of the patient's conditions, or it at any rate does not guarantee improvement in the conditions of the patients.

Humans↗

PubMedDate not supplied

The surgical treatment of spondylolisthesis.

The authors report the results obtained in 244 patients submitted to anterior interbody fusion. The method involves preoperative reduction in plaster (when necessary) and anterior surgical stabilization, facilitated by improvement in the anatomical and biomechanical conditions obtained with reduction. This method obtained excellent results in 85% of the cases, with fusion and absence of symptoms, and good results in 10% of the cases, with occasional symptoms and/or fibrous. Results were unsatisfactory in 5% of the cases because of residual radiculopathy (4 cases), non-union of the fusion (3 cases), retrograde ejaculation (2 cases), loosening of the graft (1 case) or unthreading of a screw (1 case). It is our opinion that anterior interbody fusion is the best surgical method for the stabilization of Meyerding grades III, IV and V spondylolisthesis. Posterolateral fusion is used to treat some cases with slippage equal to less than 25% (grade I) and cases where more than one level is involved.

Adolescent↗

PubMedDate not supplied

The surgical treatment of vertebral deformities in achondroplastic dwarfism.

The authors analyzed 15 patients affected with achondroplastic dwarfism with vertebral deformity treated surgically between 1976 and 1994. The forms represented were: achondroplasia; diastrophic dwarfism; spondyloepiphyseal achondroplasia. The types of vertebral deformity were: kyphosis: 12 (angular: 6; regular: 6); scoliosis: 1; kyphoscoliosis: 2. Neurological symptoms were present in 10 patients. Treatment was as follows: laminectomy: 8; posterior fusion with instrumentation: 2; anterior fusion: 2; anterior fusion with laminectomy and posterior fusion: 3. There were postoperative neurological complications in 4 cases (27%). Fusion must be performed early in angular kyphosis in the adult in order to prevent neurological symptoms. Wide laminectomies do not require associated fusion because they do not cause late vertebral instability.

Achondroplasia↗