Mobility-specific acetabular cup targets based on PI, sacral slope, and femoral mobility classification.
Free to start · iOS · No personal data collected
PI, sacral slope standing and sitting, proximal femoral angle. Optionally add anterior pelvic tilt for APP-landmark correction. The app walks through each measurement with diagrams.
Acquisition protocol →Low, Normal, or High PI. Fused, Stiff, Normal, Hypermobile, or Hyper-Kyphotic spine. Special patterns — Terrible Triad, Mixed Mobility, prior LS fixation — are detected and flagged automatically.
Inclination and anteversion with normal ranges, referenced to the AP pelvis radiograph and APP landmark. Safe zone plot. Postoperative normalization prediction. Exportable PDF report.
Standing and sitting anteversion targets referenced to the AP pelvis radiograph, corrected for tilt and mobility. Includes normal ranges by PI class.
Inclination and anteversion corrected to the anterior pelvic plane when APT is entered. For surgeons using anatomic landmark guidance.
Graphical safe zone with standing and sitting CSI thresholds and PNC postoperative normalization prediction, referenced to mobility classification.
Terrible Triad, Mixed Mobility, Dual Mobility indication, borderline classification warnings — automatically identified and flagged.
Full planning report with inputs, targets, safe zone plots, and complete reference list. Shareable, printable, saveable to the case.
CupCalc does not request, store, or transmit protected health information. Use anonymous case labels only. HIPAA-conscious by design.
Arthroplasty Fellows: CupCalc is free for active fellows with program verification. Download the app and apply through the Fellow Access program — your program coordinator receives a one-click verification email.
10% of all revenue is donated to Operation Walk USA in recognition of Dr. Lawrence Dorr's foundational contributions to spinopelvic planning.
CupCalc is an educational reference calculator. It has not been submitted to or cleared by the FDA. It performs published mathematical formulas and presents results to qualified professionals for independent evaluation. Surgical judgment is not replaced.
All outputs are theoretical calculations derived from published literature. No output constitutes a surgical recommendation. Implant selection, approach, and cup positioning are the sole responsibility of the treating surgeon and require independent clinical assessment.
CupCalc does not request, store, or transmit protected health information. Do not enter patient-identifying data into any field. Anonymized, aggregated usage data may be collected for research and product development. Individual personally identifiable information is not sold.
Zekko LLC expressly disclaims liability for any adverse outcomes arising from use of this application. The user assumes all risk associated with clinical application of information obtained from CupCalc. This limitation applies to the fullest extent permitted by applicable law.
The spinopelvic planning framework implemented in CupCalc is based in part on patented methodology. All rights reserved.
Free to start. No commitment. The published framework, at the point of care.
