Nihat Acar 1, Ahmet Karakaşlı2, Onur Gürsan2, R. Buğra Hüsemoğlu3

1Department of Operating Room Services Program, Istanbul Esenyurt University Faculty of Health Sciences, Istanbul, Türkiye
2Department of Orthopedics and Traumatology, Dokuz Eylül University, Faculty of Medicine, Izmir, Türkiye
3Department of Biomechanics, Dokuz Eylül University, Faculty of Medicine, Izmir, Türkiye

Keywords: Biomechanical study, biplanar plate, extraarticular distal humerus fractures, stability.

Abstract

Objectives: The aim of this study was to compare the stability of a novel biplanar distal humerus plate with the single- and doublecolumns J-plating techniques.

Materials and methods: Eighteen sawbones humera were divided into three groups. In Groups 1, 2 and 3, biplanar plate, single lateral J-plate and double J-plate, were used, respectively. Transverse osteotomies at the upper portion of the olecranon fossa were made. Blocks of 10-mm was removed from each sample. Axial, torsional, and extensional stiffness of each group were measured.

Results: The mean axial stiffness values in Groups 1, 2, and 3 were 64.80±6.75, 33.70±5.71, and 171.48±9.53 N/mm, respectively. Group 1 demonstrated a statistically significant difference compared to Group 2 (p=0.032), whereas Group 3 showed a statistically significant difference compared to Groups 1 and 2 (p=0.025 and p=0.014, respectively). The mean torsional stiffness values of Groups 1, 2, and 3 were 0.23±0.01, 0.14±0.008, and 0.30±0.007 N/degree, respectively. Groups 1 and 3 demonstrated a statistically significant difference compared to Group 2 (p=0.042 and p=0.028, respectively). No statistically significant difference was detected between Groups 1 and 3 (p=0.27). The mean extensional bending stiffness values of Groups 1, 2 and 3 were 2.64±0.31, 1.17±0.13, and 3.2±0.1 N/mm, respectively. Group 1 demonstrated a statistically significant difference compared to Group 2 (p=0.041). There was no statistically significant difference between Groups 1 and 3 (p=0.083).

Conclusion: Biplanar plate allows applying enough numbers of long sagittal screws and offers more biomechanical stability than lateral column J-plate and in some aspects strong as dual J-plating in torsional and bending tests.

Citation: Acar N, Karakaşlı A, Gürsan O, Hüsemoğlu RB. The evaluation of a de novo biplanar distal humerus plate: A biomechanical study. Jt Dis Relat Surg 2022;33(2):i-vii.