The app is based over the hip dysplasia app pro which has been  developed by our team. In this App we added t the degree of  abduction of  each femur  (ABD), the entry angle (EA), the Neck-shaft angle  (NSA)  and mainly the dynamic component which is to help peadiatric orthopaedic surgeons to apply the best possible way the abduction splint by using the measurements from X-rays. Investigating  virtually by dymamically changing the position of the legs and in second have all new calculated data in a screen. By scrolling a button + or - you can virtual change the position of  virtually schematic  leg  which is extracted from the calibrated data from X-ray and  by clicking the +,- button you add for each click one degree of virtual abduction. By placing more or less virtual abduction, the app concurrently calculates load, pressure and its distribution for the new position, which is printed in real time over the X-ray in the acetabulum. Each time you change the degree of abduction in real time the distribution of pressure is depicted as vectors over the acetabulum  for the corresponding degree of abduction. Within this procedure all Indexes Like Pressure, load, degree of abduction, Entry angle  are recalculated live in front of your screen for the new position of the leg in Abduction, thus allowing  to find easily the biomechanically sound position (concentric distribution of pressure inside the acetabulum). In addition the colour of the pressure vectors adds very important informations about the exerted pressure in the acetabulum - red means not favourable pressure -green means favourable pressure thus stimulating the growth  -green with black colour inside means very potent stimulus to growth. This procedure helps decide in an instant the optimal position of abduction of the extremity by changing the abduction of the brace to the suggested advantageous degree of abduction, without repeating X-rays and not blindly - based only on  surgeon experience. The uniform distribution of pressure over acetabulum and appropriate magnitude of pressure (green vector with black line inside-the optimal magnitude is the result of calculation from basic science see reference 1) will promote the uniformly remodelling of the dysplastic  acetabulum towards normal, saving time for successful outcome and objectively discovering by virtual biomechanical analysis the optimal degree of the abduction of the splint. By simply clicking the the + or - button you change the virtual degree of abduction and using the powerful calculations the whole spectrum and distribution of forces that are developing inside the acetabulum.The changing colours of depicted pressure vectors and the changing magnitude of pressure vectors which are depicted respectively by the changing length of vectors  - arranged over the acetabulum- helps and informs the surgeon both qualitative and quantitative in an instant, if the the distributed forces are  promoting the growth of acetabulum (green vectors) and  helps decide the optimal position of the leg in abduction by the splint making the treatment a simple app game. The difference in the duration of time to measure with the App compared to manual measurements is striking. Imaging to calculate all these models by hand for every 1 degree of  changing of abduction of leg … mission near impossible for a surgeon in clinical settings.
  We believe this is the first time that something like this is  attempted to merge in in one app the image of X-rays, the indexes measured for evaluating the degree  of hip dysplasia, the biomechanical analsyis, turnig the screen of an iPhone or iPad   in a  dynamic tool , by depicting all possibilities  by virtual  changing the position of the leg and  allowing predictions. All these features and after thousands built-in calculation which are integrated in this app taking also into account normal reference data according to age, height, and weight of the patient allow the paediatric orthopaedic surgeon by simply playing with the buttons very vividly, in front of his  screen  to decide which is the optimal treatment .……we must explicitly repeat that The software is a class II medical device in the FDA. All information received from the software output must be clinically reviewed regarding its plausibility before patient treatment! The App indicated for assisting healthcare professionals. Clinical judgment and experience are required to properly use the software.
The App seems to be a power full tool for orthopaedic surgeon treating children with hip dysplasia. By marking  few anatomical landmarks developmental dysplasia of the hip can be successfully treated with the help of the App which seems to be an easy answer to monitor, evaluate, store, handle and compare all the measured data in an extreme rapid way and help decide the optimum therapy. We think  that he have made some great contributions to the advancement of orthopedic care by this App.

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