Full Stack AI Developer
Dentva.ai — AI Voice Receptionist
24/7 AI voice receptionist for dental clinics — answers patient calls, books appointments, verifies identities, and handles FAQs with HIPAA-focused architecture
Overview
Dentva.ai is a HIPAA-focused AI voice automation platform that replaces traditional dental clinic receptionists with a conversational AI that never sleeps. Dental practices lose patients every day to missed calls and limited front-desk hours. Dentva.ai answers every inbound call, understands natural language requests, books or reschedules appointments in real time via PMS integration, verifies patient identity via OTP before sensitive actions, and answers clinic-specific FAQs using semantic vector search — all while keeping protected health information secure through encryption, audit logging, and role-based access control.
The Challenge
Building a voice AI that works reliably in a healthcare context required solving three hard problems simultaneously: sub-second latency for natural conversation feel (patients hang up if the AI sounds laggy), strict HIPAA-focused data handling for every transcript and patient record, and reliable PMS integration with graceful fallback logic when the practice management system is temporarily unavailable. On top of that, each dental clinic has its own services, providers, insurance policies, and hours — requiring a multi-tenant architecture where every clinic's knowledge base is fully isolated.
How We Solved It
Real-Time Voice Processing Layer
Built an end-to-end voice pipeline integrating telephony (iPlum / Telnyx), AWS Transcribe Medical for speech-to-text, Azure OpenAI for response generation, and AWS Polly for natural voice synthesis. Streaming architecture keeps latency low enough that conversations feel natural rather than robotic.
AI Conversation Engine with LangChain + LangGraph
The AI orchestration layer uses LangChain and LangGraph to manage multi-step dialogue workflows: speech recognition → intent detection → context tracking → patient verification → PMS lookup or knowledge retrieval → response generation → voice synthesis. LangGraph's stateful graph architecture ensures conversations remain coherent across multi-turn interactions.
PMS Integration & Appointment Automation
Integrated with dental Practice Management Systems to handle real-time availability checks, new bookings, rescheduling, and cancellations — including provider and appointment type selection. A fallback scheduling layer ensures zero missed appointments even during PMS downtime.
OTP-Based Patient Verification
Sensitive appointment actions (modification, cancellation) are protected by a caller identification + OTP verification flow using AWS SNS. Only verified patients can modify their own records, preventing unauthorized access to PHI.
Semantic Knowledge Base with pgvector
Each clinic maintains an isolated vector knowledge repository stored in Aurora PostgreSQL with the pgvector extension. Clinic staff upload FAQ documents or add Q&A pairs directly through the dashboard. During calls, the AI performs semantic similarity search to retrieve the most relevant answers for patient queries about services, hours, insurance, and treatments.
Clinic Admin Dashboard
A Next.js + shadcn/ui dashboard gives clinic admins full visibility and control: call history with duration/outcome, HIPAA-redacted transcripts with AI summaries, PMS data sync (providers, appointment types), knowledge base management, and call analytics. Authentication is secured through Amazon Cognito with role-based access controls.
HIPAA-Focused AWS Infrastructure
The entire platform runs on AWS ECS Fargate with encrypted Aurora PostgreSQL databases, S3 for secure storage, CloudWatch for monitoring and audit logging, and end-to-end PHI redaction in all exported transcripts. Every layer is designed around the principle of minimum necessary access.
Admin Dashboard
Results & Impact
24/7 Patient Call Coverage
Every inbound patient call answered — no missed calls during lunch, after hours, or on weekends.
Automated Appointment Booking
Patients book, reschedule, and cancel appointments entirely through the AI voice interface, with real-time PMS sync.
OTP-Verified Identity Protection
All sensitive appointment actions gated behind caller ID + one-time password verification before any PHI is accessed or modified.
Semantic FAQ Resolution
pgvector-powered semantic search retrieves the correct clinic-specific answer across services, insurance, hours, and treatments — even for paraphrased or ambiguous patient questions.
HIPAA-Focused Transcripts
All call transcripts are stored with PHI redaction, audit logging, and role-based access — exportable by clinic admins from the secure dashboard.
Multi-Tenant SaaS Architecture
Each dental clinic operates in a fully isolated data environment, enabling safe SaaS expansion to multiple practices on shared infrastructure.
Technical Architecture
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