OsteotomyApp vs OsteoPlan

Mal alignment of the hip, knee, and ankle leads to premature cartilage damage and to development of degenerative arthritis of knee joint. Femoral and tibial osteotomies around the knee are established procedures for the restoration of the physiological load distribution of pressure at the knee joint. Accurate preoperative planning is mandatory to avoid under correction or overcorrection of axes or placing the joint-line in obliquity that ends to insufficient postoperative alignment.The majority of osteotomies are still planned and performed using conventional techniques drawing over transparent papers, cumbersome measurements etc. The app assists at preoperative correction planning by calculating : -the amount of correction preoperatively by calculating the dimension of wedge size , the correction angle and osteotomy gap opening or closing. -mechanical axis deviation (in mm) MAD, anatomical and mechanical femoral axes angle (aMFA),mechanical lateral proximal femoral angle (mLPFA), mechanical lateral distal femoral angle(mLDFA), joint line convergence angle (JLCA),mechanical medial proximal tibial angle (mMPTA), Mechanical lateral distal tibial angle (mLDTA), Hip Knee Ankle line (HKA) ,Mid joint line (MJL) orientation. -objectively the deviation or deformity in the frontal plane (varus or valgus) and differentiate the level of deformity (femoral and or tibial origin) and according to measured angles objectively suggest where indicated, medial or lateral, open or closed-wedge distal femur osteotomy or high-tibial osteotomy or double osteotomies and avoiding unwanted obliquity of the joint line App allows he surgeon to -change the planned mechanical axis to pass at the preferred percentage (Fujisawa point) after evaluation of the residual cartilage thickness left on the involved compartment. select the location of hinge point of correction osteotomy for planning of varus or valgus corrections -evaluate in real time the success of intended osteotomy by evaluating the kinematic alignment of the knee (KAO), avoiding residual joint obliquity or malalignment. -measure the correction angle adjusted due to ligament instability and preoperatively calculate the height of osteotomy gap opening. -pressing + or - button, one degree of correction is added or subtracted respectively and the second plane of osteotomy emerges and printed in screen real offering real time simulation of the wedge osteotomy in an instant to comprehend in real time what parameters are affected and modify favourably the correction angle. All above mentioned angles and all limp axes are redrawn and updated accordingly for the given new correction angle. The drawn schematic gives the impression of settings act as a whole interchangable interacting unit. - dynamicaly preview and easily predict potential intraoperative errors, that could emerge and choose the optimal degree of correction without disruption kinematic alignment of the limp. -to combine correction- Biplanar-, at coronal plane and sagittal plane (based on Hernigou 2001 calculations ) on tibia slope and provide the direction of the plane (ω angle) in which the osteotomy (open or closed) should be made ,the height the opening or closing wedge and the correction angle (Δ angle), -to simulate, before real bone cuts are done and try different strategies in relation to the location, the type of osteotomy, the joint obliquity without to redraw in paper board countless drawings in an effort to achieve the optimal correction and mean while taking into account and balancing all influencing preoperative factors. -real time dynamically change of mechanical axis lines, modify also the drawings of femur and the tibia and in instant depicting a precise preview of the whole preoperative plan for optimal results. -categorisation of the deformities based to international literature normal references values, help to indicate to user the type of osteotomy.

OsteoPlan is an all-in-one orthopaedic planning, measurement, operative note, and case management app for surgeons and trainees. Designed by an Orthopaedic Surgeon, it is built around real clinical workflows for planning, documentation, teaching, and follow-up. Measure coronal and sagittal limb alignment, classify knee phenotypes, plan osteotomies, simulate corrections, calculate wedge sizes, and document cases with structured images, notes, scores, follow-ups, and exports. All core tools are included free. Key Features Limb Alignment Analysis Measure HKA, MPTA, LDFA, JLCA, PTS, PDFA, SJLA, and other coronal/sagittal knee alignment parameters using point-based marking, draggable landmark labels, and visual axis display. CPAK Classification Use knee alignment measurements to generate CPAK classification with type-specific visual results. Osteotomy Planning Plan and simulate HTO, DFO, and Double-Level Osteotomy. Calculate correction angles, wedge sizes, predicted alignment, and visualize correction on radiographs. Clinical Measurement Tools Dedicated workflows for knee, shoulder, hip, spine, trauma, and general orthopaedic measurements. Spine Tools Measure Cobb angle, coronal balance, sagittal vertical axis, pelvic parameters, thoracic kyphosis, and lumbar lordosis. Trauma Tools Assess common trauma angles including distal radius parameters, Böhler’s angle, Gissane’s angle, Meary’s angle, Kite’s angle, Baumann’s angle, neck-shaft angle, acetabular index, and critical shoulder angle. Structured Case Storage Store patient details, BMI, clinical scores, images, intra-operative findings, post-operative records, OT notes, and follow-ups in organized folders. OT Notes & Templates Create structured operative notes with guided templates for common orthopaedic procedures, implant details, rehabilitation protocols, and review dates. Export & Backup Export annotated images, PDFs, OT notes, or complete case folders as ZIP files. Supports cloud backup options for safer data continuity. Designed for iPhone, iPad, and Mac, with Apple Pencil support on iPad.