Jordy van Sambeeck

Summary, general discussion and future perspectives 9 159 Conclusions The answers on the research questions and the general discussion of this thesis lead to the following conclusions: 1. The current radiologic measurement methods for patellar height are reliable, but there is no single perfect measurement, all have their shortcomings. We propose to measure patellar height on conventional radiographs using Caton- Deschamps. One should be aware of the shortcomings of measurements of patellar height, lateralization and trochlear dysplasia when interpreting results and deciding on which surgical treatment to perform. 2. The rate of major complications of tibial tubercle and trochlear osteotomies for the treatment of patellofemoral instability is low and these procedures can be considered safe. 3. Two patellofemoral instability specific patient reported outcome measurements have been translated to Dutch and validated in a Dutch population and can now be used to measure subjective outcome of patients with patellofemoral instability and/or pain.