External fixation in distal radius fractures

Background: Distal radius fractures are frequent in emergency departments, treatment is generally conservative, but there are patients who meet certain criteria of instability who need surgical treatment, including external fixation. Aim: To update on the most important elements regarding the use of external fixation in unstable fractures of the distal radius. Methods: The search and analysis of the information was carried out in a period of 30 days (from April 1 to April 30, 2021) and the following words were used: distal radius fractures, distal radius fractures and external fixation and unstable radius fractures from the information obtained, a bibliographic review of a total of 809 articles published in the PubMed databases, Hinari, SciELO and Medline was carried out using the search manager and EndNote reference manager, of which 44 selected citations were used to perform the review, 37 from the last five years. Development: The criteria to be taken into account for the instability described by various authors are indicated, as well as the imaging parameters. The two most used classification systems are mentioned. Reference is made to general surgical indications, external fixation, and placement of additional wires. Complications are discussed and a comparison is made between external fixation and blocked volar plates.

Comparison between external locking plate fixation and conventional external fixation for extraarticular proximal tibial fractures: a finite element analysis

Background Good clinical outcomes for locking plates as an external fixator to treat tibial fractures have been reported. However, external locking plate fixation is still generally rarely performed. This study aimed to compare the stability of an external locking plate fixator with that of a conventional external fixator for extraarticular proximal tibial fractures using finite element analysis. Methods Three models were constructed: (1) external locking plate fixation of proximal tibial fracture with lateral proximal tibial locking plate and 5-mm screws (ELP), (2) conventional external fixation of proximal tibial fracture with an 11-mm rod and 5-mm Schanz screws (EF-11), and (3) conventional external fixation of a proximal tibial fracture with a 7-mm rod and 5-mm Schanz screws (EF-7). The stress distribution, displacement at the fracture gap, and stiffness of the three finite element models at 30-, 40-, 50-, and 60-mm plate–rod offsets from the lateral surface of the lateral condyle of the tibia were determined. Results The conventional external fixator showed higher stiffness than the external locking plate fixator. In all models, the stiffness decreased as the distance of the plate–rod from the bone surface increased. The maximum stiffness was 121.06 N/mm in the EF-11 model with 30-mm tibia–rod offset. In the EF-7 model group, the maximum stiffness was 40.00 N/mm in the model with 30-mm tibia–rod offset. In the ELP model group, the maximum stiffness was 35.79 N/mm in the model with 30-mm tibia–plate offset. Conclusions Finite element analysis indicated that external locking plate fixation is more flexible than conventional external fixation and can influence secondary bone healing. External locking plate fixation requires the placement of the plate as close as possible to the skin, which allows for a low-profile design because the increased distance from the plate to the bone can be too flexible for bone healing. Further experimental mechanical model tests are necessary to validate these finite element models, and further biological analysis is necessary to evaluate the effect of external locking plate fixation on fracture healing.

Tibial plateau fractures in a limited-resource setting: A prospective study of surgical techniques and outcome over three years

Introduction: Tibial plateau fractures form a wide spectrum of injuries accounting for 1.2% of all fractures and a prevalence of 10 cases per 100,000 inhabitants. Methodology: A prospective consecutive multicentre study from May 2018 to May 2021 was carried out in Yaounde. All consenting cases of tibial plateau fracture underwent surgical treatment while patients with pathologic fractures, previous knee osteoarthritis, medically unfit for surgery, and discharging against medical advice were excluded. Data was analysed with SPSS 26.0 and the level of significance set at p<0.05. Results:Eighty-four (84) cases of tibial plateau fractures were sampled and 68 consented to surgery. The mean age was 42 ±13.6 years and sex ratio 2.4. Estimated prevalence was 2.2 cases per 100,000 inhabitants. Schatzker type II fractures were most represented (33.3%). The left leg was affected in 57.1%. Motorbike accidents were the main cause of injury (66.7%). Of the 68 operated, 63.3% by plating osteosynthesis, 32.4% by external fixation, and 4.4% by screws fixation. Tricortical iliac bone graft was realised in 4 cases. The minimum follow-up was 6 months, with a median of 18 months (5 to 37 months). Plating osteosynthesis (p<0.001), operative time between 60 to 120 minutes (p<0.02) and a good radiologic fracture healing (p<0.04) were associated with a satisfactory outcome. Poor prognosis was seen with open fractures (p<0.001), bridging external fixation (p<0.001), and Schatzker VI fractures (p<0.02). Complications included post-traumatic osteoarthritis (64.7%), post-traumatic osteomyelitis (29.4%), knee ankylosis (5.9%), and limb malalignment (30.9%). Conclusion:The prevalence of tibial plateau fractures remains lower than reported in literature but it is projected to rise. Plating remains a viable treatment option. A larger scale study will establish the burden of this entity in our context.