Dental Imaging Workflow System » Web Orthagnathic Surgery Planning

Objective

Quantify alignment accuracy between STL and CBCT (or between pre/post positions).

Tasks
Math Core
Implement RMS formula:

RMS=
N
1
​

∑
i=1
N
​

∣∣p
i
​

−q
i
​

∣∣
2
​

Where:

p
i
​

= source points (STL)
q
i
    ​

= target points (CBCT)
Algorithm
 Implement:
ICP (Iterative Closest Point)
 Use:
KD-tree for nearest neighbor search
Pipeline
 Input:
STL mesh
CBCT surface (or point cloud)
 Output:
RMS error value
Per-point error map
Visualization
 Heatmap overlay:
Green (low error)
Red (high error)
 Show:
Mean RMS
Max deviation
UI
 Add panel:
“Alignment Quality”
 Add threshold indicator:
Acceptable (< 1mm)
Warning (> 2mm)