Multiplier vs OsteoPlan

The Multiplier App automates calculations to predict mature height and bone length in children. This method was created originally in Baltimore at the University of Maryland and subsequently developed at the International Center for Limb Lengthening (ICLL), Rubin Institute for Advanced Orthopedics (RIAO), Sinai Hospital of Baltimore. We have taught the Multiplier Method for more than 19 years at our annual Baltimore Limb Deformity Course (http://www.DeformityCourse.com). These calculations are typically performed by hand, using various formulae. Certain calculations are easy, but others involve more complicated formulae. Utilizing this app will reduce the time needed for these routine calculations and decrease errors. You need only input certain data (sex, age, length) and the app will calculate the answer by using the appropriate Multiplier formula. The Multiplier App will allow you to make the following calculations: LOWER EXTREMITY · Limb Length Discrepancy (LLD) (Congenital) · LLD (Developmental) · Growth Remaining · Bone Length · Timing of Angular Correction · Timing of Epiphysiodesis · Comprehensive (Congenital) LLD and Epiphysiodesis · Scanogram Calculations (Calculates femur/tibia lengths, overall limb length discrepancy, and amount/side of femur/tibia discrepancies) UPPER EXTREMITY · LLD (Congenital) · LLD (Developmental) · Growth Remaining · Bone Length Height and CDC Growth Charts (Calculates height at maturity, calculates height at every age, and plots the patient’s height and weight on the CDC growth charts) ACHONDROPLASIA · Height · Sitting Height · Leg Length Fetus (Calculates the length of tibia or femur at birth and maturity) FOOT · Foot Length · Foot Length Discrepancy · Foot Height · Foot Height Discrepancy Spine (Calculates sitting height at maturity) Oblique Plane Deformity (Calculates magnitude, orientation, and direction of an oblique plane deformity) Inclined Osteotomy (Calculates the rotational orientation and the vertical inclination of the osteotomy) This app also provides the following additional resources: · Bone Age: Elbow and Hand (Shows how to determine skeletal age by using radiographs of the elbow or hand) · Figures that show the standard measurements for the lower limb and foot · The multiplier formulae that the app uses to perform the calculations · Tables that show the multiplier values that are used in the formulae · Figures that show the Solomin Foot Analysis (Deformity correction planning for the midfoot, hindfoot, and ankle using reference lines and angles provided by Dr. Leonid Solomin) · Figures that show the development of the apophyses, epiphyses, and bones · Bibliography · User guide DISCLAIMER: No growth prediction method is 100% accurate; this App is not a substitute for sound and careful clinical judgment. PRIVACY POLICY: We respect the privacy of the people who use the International Center for Limb Lengthening apps. The Multiplier app does not collect, use, or distribute any data from the users.

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.