App: HipBiomechanicsApp
Developer: ORTHOPRACTIS.COM SINGLE MEMBER P.C.
Genres: Medizin

Human hip is a biologic system that obeys purely mechanical laws. The main concern of the orthopedic surgeon especially those treating the dysplatic hip is to improve the biomechanical status of the joint. To accomplish this, the surgeon must be familiar with the biomechanics of the hip. Because of the complexity of biomechanical analysis (trigonometric functions, etc.) is almost impossible to calculate  in everyday settings, forces acting on the hip, the directions in which they act, and the associated stresses that develop within the joint. With measurements by the App and having numerical data it is possible to evaluate the efficacy  or even predict it of the various procedures not on the basis of experience any more. 
The Hip Biomechanics App is medical software aimed for orthopaedic surgeons, providing tools that allow doctors to:
-Securely import medical images directly from the camera or stored photos.
-By marking certain points in a simple standard AP pelvic radiograph, geometric parameters are being calculated. The App computes weight-bearing contact surface, the load (R) and stress (P) on the measured hip. 
Data from load and pressure distribution in the hip - like in a real biomechanicals tests- are being measured and depicted graphically as vectors over the X-ray  in the screen over the joint. The distribution also of compressive stresses over the acetabulum, which is usually associated radiographic sclerosis over the acetabular margin, are printed in real time over the screen and thus can be easily and  objectively evaluated. Besides that, the App provides data in export for diagrams of load (R) pressure (P), which  each can be plotted as a curve allowing easy comparison with normal data and thus help decide the orthopaedic surgeon which procedure is objectively indicated.
-The data are printed over to screen so each case can easily assessed 
-Save the planned images, for later review or consultation. Data are exported as txt file, ready to print or to input as cells to numbers or excel ready for chart printing and further research.
 All information received from the software output must be clinically reviewed regarding its plausibility before patient treatment! Hip Biomechanics App indicated for assisting healthcare professionals. Clinical judgment and experience are required to properly use the software.The software is not for primary image interpretation.
Reference
	1. Legal H (1977) Biomechanische Analyse des Hiiftgelenks. Ein Beitrag mit besonderer Berucksichtigung der Druckberechnung und der klinischen Anwendung. Habilitationsschrift, Universitat Erlangen Nurnberg. 
	2. Pauwels F (1935) Der Schenkelhalsbruch, ein mechanisches Problem. Grundlagen des Heilungsvorganges, Prognose und kausale Therapie. Z Orthop Chir 63 (Beilageheft).
	3. Tönnis, Dietrich (1987) Dysplasia and Dislocation of the Hip in Children and Adults. Chapter 4, Current Knowledge on the Biomechanics of the Hip, page 26-57. Book
Disclaimer 
Before you use the software. The software should be used only for educational purpose . Never use in real Surgery regarding its plausibility, validation is pending. The app is for educational use. Clinical judgment and experience are required to properly use the software.These instructions alone do not replace in depth training in planning for osteotomies. It only serves as a general guideline. All information received from the software output must be reviewed before any actual attempt. Judgment and experience are required to properly use the App. The software is not for primary image interpretation. Any influence to the operators in making decisions remains Surgeons own responsibility and experience. App does not dispense medical advice.

Release notes:
updated for iOS 14.5, bugs fixed.