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This study discusses the results of a histological examination of bone calluses in the treatment of tibia fractures in sheep with the involvement of a semi-circular fixator. In all sheep, callus samples revealed the presence of well-developed, compact bone tissue in the area of fracture healing. It was found that the use of a semi-circular fixator promoted bone growth, and that it is an effective method for tibia fracture treatment in sheep. The restoration of bone continuity and bone union are complex processes, and their success is determined by the effectiveness of osteosynthesis. A correctly osteosynthesized fracture leads to the development of several overlapping phases in the healing process. The organization of the hemato - ma, fibroplasia, chondroplasia and osteoplasia has been determined within the space of several dozen micrometers. The newly-developed tissue initially forms homogenous cell clusters that gradually un - dergo metaplasia and transformation into osseous trabeculae and osseous lamellae. Various stabiliza - tion techniques are applied in the treatment of bone fractures in animals (Brinker and Verstraete, 1985). The aim of most osteosynthesis techniques is to provide a biological method for fracture treatment and to lower the incidence of the related compli - cations. Only an estimated 5% of bone fractures are not united (Frost, 1989). In most cases, the se - lection of an adequate osteosynthesis technique and meeting osteosynthesis requirements lead to healing and the formation of healthy bone tissue (Jalynski et al., 2004). Disturbances in bone un - ion pose a serious therapeutic problem. Existing treatment methods have been improved and new stabilization techniques have been developed to address this issue. One such solution is the use of a semi-circular external fixator, developed by Adamiak (2010), for the osteosynthesis of long bone fractures. The results of clinical trials investigating the effectiveness of the semi-circular fixator in the treatment of tibia and ulna fractures were discussed by Adamiak (2010) in the Veterinary Record.

A histological evaluation of bone calluses in the treatment of tibia fractures in sheep with the use of a semicircular fixator