The following is an analysis of the application of plantar scanners in custom orthotic insoles, combining industry practices and technical processes:
1. The Core Role of 3D Data Acquisition
Plate scanners rapidly capture the three-dimensional shape of the foot using a laser array (typically 650nm red light). Within 10-20 seconds, a single scan can generate a 3D model containing over 20 parameters, including arch height and metatarsal angle.
Compared to traditional plaster casts, this technology reduces measurement errors to within 0.12mm, particularly accurately capturing arch collapse and calcaneal valgus angle. These STL-formatted data can be directly imported into insole design systems, providing the foundation for personalized orthotic correction.
II. Complete Process for Customizing Corrective Insoles
Foot Disease Analysis and Solution Design
Rehabilitation therapists use 3D models to identify structural abnormalities such as flat feet and high arches, and simulate mechanical support points through software.
Dynamically adjust the arch support height (usually 3-15mm) and metatarsal pad position to balance plantar pressure distribution.
Digital Production
Design data drives a 3D printer or CNC engraving machine to precisely cut EVA/TPU material (accuracy ±0.3mm).
Multi-layer composite structure achieves zoned function: forefoot buffer zone with a hardness of 40-50 Shore A, arch support zone with a hardness of 6 0-70 Shore A
III. Clinical Value and Technological Advantages
Personalized Fit Improves Efficacy
Customized insoles reduce peak plantar pressure by 27%, effectively alleviating plantar fasciitis and knee and hip compensatory pain.
Long-term wear improves gait parameters: step width is reduced by 15%, and contact time is extended by 0.2 seconds.
Technological Innovation
Data archiving supports regular comparisons (e.g., semi-annual review of arch height changes).
Full process time is reduced from the traditional 7 days to within 48 hours.
Note: Severe deformities (arch collapse >15mm) require optimized design based on biomechanical gait analysis. Current technology is limited by the inability to monitor gait dynamics in real time, requiring functional verification with a pressure plate.
