? 2022The acetabulum is considered as a complex three-dimensional structure with intricate nomenclature describing its anatomy, becoming even further intimidating when fractured. The dominant classification system for acetabular fractures (AFxs) remains the one Letournel introduced 40 years ago. The main features of the different types of this classification system are presented, its recognized limitations, the published alternative systems, but also a simple algorithm which allows its successful use even by less experienced clinicians. The great importance of being effective in using the Letournel classification system derives from its strong association with the anatomic characteristics of the different AFxs and the understanding of the principles of reconstruction of this demanding type of orthopaedic trauma.
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