HISTORA is a dental data platform built on one core belief: dental imaging data should be accessible to anyone who needs it — patients, dentists, and specialists alike — without requiring proprietary software, expensive hardware, or a degree in DICOM protocol.
Today we're documenting how we built the browser-native 3D DICOM viewer that ships as part of HISTORA's platform.
The problem with dental imaging software
DICOM (Digital Imaging and Communications in Medicine) is the universal standard for medical imaging. Every dental X-ray, cone beam CT (CBCT), and 3D scan is stored as a DICOM file. The problem? Viewing them requires proprietary software.
Romexis, Carestream Dental, OnDemand3D, Simplant — every major imaging software vendor ships a desktop application that must be installed, licensed, and maintained. When a dentist wants to send a 3D CBCT scan to a specialist, the specialist typically needs:
- The same software installed locally
- A compatible version of that software
- Administrator access to install it
- A physical CD, USB drive, or unsecured file transfer
This is the status quo in 2025. It means specialists routinely wait days for referral imaging. Patients can never view their own scans. And cross-clinic collaboration involves physical media that can be lost, damaged, or arrive with incompatible file associations.
Building a browser-native solution
HISTORA's engineering approach was to build a DICOM viewer that runs entirely in the browser using WebGL and WebAssembly — no software installation, no plugins, no dependencies.
The viewer supports:
- 3D CBCT rendering: Full volumetric rendering of cone beam CT data, with MPR (multi-planar reconstruction) for axial, coronal, and sagittal views
- STL model display: Direct rendering of STL dental models — surgical guides, crown preparations, implant planning models
- 2D DICOM: Standard periapical, panoramic (OPG), and bitewing X-rays
- Measurement tools: Linear and angular measurements calibrated to the DICOM pixel spacing metadata
- Windowing: HU windowing controls for soft tissue and bone visualization
- Mobile support: The viewer runs on iOS Safari and Android Chrome — a patient can view their CBCT on their phone
What this means for specialist referrals
The practical implication is this: when a dentist sends a referral packet through HISTORA, the specialist receives a secure link. They click it, authenticate, and view the full 3D CBCT scan in their browser — typically in under 10 seconds.
No software. No disc. No phone call to IT. No waiting.
For oral surgeons, implantologists, and periodontists whose workflow depends on reviewing 3D anatomy before consultations, this changes the timeline from days to seconds.
What this means for patients
Before HISTORA, a dental patient who wanted to see their own CBCT scan faced a near-impossible task. The files were stored in clinic systems. Exporting them required staff time. Viewing them required software the patient didn't have.
With HISTORA's browser viewer, a patient can open their 3D DICOM scan on their smartphone from the waiting room. This isn't just convenience — it's a meaningful shift in dental patient autonomy.
Technical architecture
The viewer is built on a WebAssembly core (compiled from C++) that handles DICOM parsing and volume rendering. The WebGL render pipeline handles real-time MPR slicing and 3D isosurface visualization.
DICOM files are streamed from HISTORA's encrypted storage to the client-side renderer. The server never sends unencrypted DICOM to the browser — all encryption is handled at the storage layer, with per-file access tokens issued only to authorized users.
Performance is managed through:
- Progressive loading: low-resolution preview loads in under 2 seconds, full resolution follows
- Tile-based streaming for large CBCT datasets (400MB+ studies)
- WebWorker offloading for file parsing to prevent UI blocking on mobile
The road ahead
The current viewer handles the core workflow: viewing, measuring, and sharing 3D dental DICOM. Future work includes:
- Implant planning overlay tools
- AI-assisted landmark detection
- Integration with surgical guide design workflows
- Collaborative annotation (multiple users viewing and annotating simultaneously)
The browser-native approach means these features can be shipped without requiring users to update installed software. HISTORA users automatically get the latest capabilities the moment they're deployed.
The 3D DICOM viewer is available in the HISTORA demo. No account required — you can view sample CBCT data immediately.