ABSTRACT
Background: Despite a sufficient number of papers on the technique of transtibial amputations, the technique of Ertl-type reamputation in short tibial stump remains unreported. Aim: To propose a modification of the Ertl operation in the proximal tibia. Case Presentation: The technique of bone bridge creation in a patient with a malformed stump in the upper third of the tibia at the expense of the regenerate formed after corticotomy of the tibial remnant and dosed distraction of the graft by the Ilizarov apparatus is described. Radiological, ultrasound and MRI methods were used to control the regenerate. The follow-up period was 36 months. At 3.5 months, a synostosis was formed, which allowed primary and then permanent prosthesis with a full-contact prosthesis. At 36 months, the organotypic remodelling of the regenerate was completed. The patient works, uses the prosthesis for 15-16 hours a day, and walks on average 8-10 km. Conclusion: The use of the proposed method makes it possible to obtain tibial synostosis without their shortening with elimination of valgus deviation of the fibula stump and the possibility of early functional loading. Synostosis formation occurs within 3.5 months after surgery. Organotypic bone remodelling occurs during primary and then permanent prosthetics. The formed bone bridge has a large support area, which is maintained during the whole follow-up period of 36 months and allows to perform full-contact prosthetics with maximum load on the residual limb end.
ABSTRACT
Aim: To study the peculiarities of peroneal stump remodelling after transtibial amputation in the process of prosthesis usage. Material and Methods: A histological study of the ends of the stumps of the fibula in 68 patients was performed. Terms after amputation: 2-8 years. Results: In the 1st group the stumps with the reparative process completion were formed. In the 2nd group there were sharp disturbances of the reparative process with the formation of the cone-shaped end. In the 3rd group there was a pronounced periosteal bone formation with changes in the shape and structure of bone tissue and incompleteness of the reparative process. Conclusion: Absence of balloting of the fibula stump and dense overlapping of the medullary cavity by muscles promotes complete remodelling of the fibula remnant with preservation of its organicity. Pathological remodelling of the fibula stump occurs due to its hypermobility, repeated traumatisation of the forming regenerate, neuritis of the peroneal nerve, osteogenesis disorders and structural and functional mismatch of the bone tissue to the loading conditions in the prosthesis. Morphological signs of pathological remodelling are the lack of completion of reparative regeneration, intensive bone tissue remodelling lasting for years with pronounced resorption and appearance of immature bone structures, fractures of the cortical diaphyseal layer, residual limb deformities with formation of a functional regenerates, narrowing and closure of the medullary canal with conglomerate with soft tissue inclusions. The anatomical inferiority of bone tissue formed in the process of remodelling of the fibula remnant creates a threat of stress fracture.
ABSTRACT
Aim To study the character of blood circulation in the bone stump at tight and loose closure of the medullary cavity. Methods Two series of experiments on 39 rabbits with mid-third femoral amputation and muscular plasty were carried out. In the 1st (experimental) series, the bone scapula was closed by thin cortical autograft taken from the epimetaphyseal area, and then the muscles were sutured, and in the 2nd - the scapula was closed by myoplasty only. Follow-up periods: 1st series - 7, 14, 21 days and 1, 3, 6 months, 2nd series - 1, 3, 6 months. Histological methods with infusion of vessels with ink-gelatin mixture and morphometry was used. Results In the 1st series there was a rapid restoration of the disturbed macro- and microcirculation due to the reserve sources of blood circulation and the development of extravascular ways of microcirculation. In the 2nd series, blood circulation recovery was significantly slower and occurred mainly due to the development of extravascular microcirculatory pathways. Conclusion The study established undeniable usefulness of tight closure of the bone marrow cavity during amputation.
