# On-Device Dental Documentation: Zero Data Leaves the Practice

> Dentists spending 10-15 minutes documenting each patient. Patient data must never leave the practice.

- Canonical: https://suvegasoft.co.uk/case-studies/dental-documentation/
- Client: UK Dental Group
- Industry: Healthcare
- Timeline: 2 months delivery
- Technologies: Whisper (local), Gemma 3, WebGL, Browser-based
- Published: 2025-01-14T00:00:00.000Z

**Key results:** 85% less documentation time · 200 practices deployed · 0 patient data leaves device · 2 minutes vs 15 minutes per patient

## Challenge

A UK dental group with 200 practices faced a documentation crisis:

- **Time Drain**: Dentists spent 10-15 minutes after each patient documenting findings
- **Work-Life Balance**: Many dentists stayed late to complete notes
- **Inconsistency**: Documentation quality varied widely between practitioners
- **Privacy Mandate**: Patient data absolutely could not leave the practice—no cloud services allowed

Traditional cloud-based transcription services were off the table due to strict data privacy requirements. The dental group needed AI that worked entirely within the browser, with zero external data transmission.

## Solution

We built a 100% on-device AI documentation system that runs entirely in the browser:

### How It Works

1. **Records Consultation**: Audio captured during the patient appointment
2. **Local Transcription**: Whisper model runs locally—no audio leaves the device
3. **Clinical Extraction**: Gemma 3 via WebGL extracts findings, treatments, observations
4. **Template Population**: Auto-fills the dentist's own documentation templates
5. **Quick Review**: Dentist reviews and corrects in under 2 minutes

### Technical Innovation

The key breakthrough was running powerful AI models entirely in the browser using WebGL acceleration:

- **Whisper** for speech-to-text runs locally on the dentist's computer
- **Gemma 3** for clinical extraction runs via WebGL in the browser
- **Zero network calls** for any patient data
- Works offline once loaded

### Privacy Architecture

```
[Microphone] → [Local Whisper] → [Local Gemma 3] → [Local Storage]
                     ↓                   ↓
              (no cloud)           (no cloud)
```

Patient data never touches any external server. The practice owns and controls everything.

## Results

The impact on dental practices was transformative:

| Metric                         | Before     | After       |
| ------------------------------ | ---------- | ----------- |
| Documentation time per patient | 10-15 mins | 2 mins      |
| End-of-day admin backlog       | 1-2 hours  | Nearly zero |
| Documentation completeness     | Variable   | Consistent  |

### By the Numbers

- **85%** reduction in documentation time
- **200** practices now live
- **0** patient data ever leaves the device
- **GDPR** fully compliant

### Dentist Feedback

The reception from dental practitioners has been overwhelmingly positive:

- No more staying late to finish notes
- More time with patients, less time typing
- Consistent, complete documentation
- Peace of mind on data privacy

## Technical Details

### Tech Stack

- **Speech-to-Text**: Whisper (running locally)
- **LLM**: Gemma 3 via WebGL
- **Runtime**: Browser-based, no installation required
- **Storage**: Local browser storage, exportable to practice management systems

### Why On-Device?

We chose on-device for several reasons:

1. **Privacy**: Healthcare data is sensitive—local processing eliminates risk
2. **Compliance**: GDPR compliance is simpler when data never leaves
3. **Reliability**: Works even with poor internet connectivity
4. **Cost**: No ongoing API costs for the dental practices
5. **Speed**: No network latency for transcription

### Integration

The system integrates with existing practice management software via:

- Copy/paste workflow (immediate)
- CSV export (batch)
- Direct API integration (for larger groups)

## Project Details

- **Duration**: 2 months from concept to first practices live
- **Team**: 3 engineers (1 ML/WebGL specialist, 1 full-stack, 1 UX)
- **Status**: Live in 200 practices across the UK
- **Compliance**: GDPR compliant, zero cloud dependency

***

_Need on-device AI for privacy-sensitive applications? [Contact us](/contact) to explore what's possible._