One record on every computer: networking your dental office without the cloud

A single-chair practice can run its whole record on one computer. The moment you add a second operatory, or a front desk that schedules while the dentist charts, that stops working: two people need the same patient record at the same time, in different rooms. How you solve that quietly decides where your patients' data lives.

This guide is for dentists and clinic staff setting up more than one computer, and it stays vendor-neutral until the last section.

One record, many rooms

The problem is not storage, it is agreement. Reception opens a patient to take a payment while the dentist, three metres away, is adding today's treatment to the same chart. Both need to see the other's changes without walking a USB stick between rooms or keeping two copies that slowly disagree. A shared record has to be one record, visible from every computer, updated live.

Three ways to share it

• One computer for everything. Simple and private, but it does not scale: only one person works at a time, and if that machine fails the practice stops.
• The cloud. A hosted server holds the record and every computer reads it over the internet. It shares easily, but it adds a monthly fee, a hard dependency on your connection, and it moves patient data out of the office onto someone else's servers.
• The local network (LAN). The computers in your office talk to each other directly over your own router. The record is shared between them, but it never leaves the building and it does not need the internet to work.

The first does not grow with you. The choice that matters is between the last two, and it comes down to a question worth answering on purpose rather than by default: does your patients' data need to leave your office?

What "on the local network" means

On a LAN, each computer keeps its own copy of the record and the copies keep each other up to date over the office network. When the dentist charts a tooth in operatory 2, that change travels across the router to reception's screen; when reception books a follow-up, it appears on the dentist's list. There is no central cloud in between, just your own machines, on your own wifi or cabling, syncing to each other.

The practical payoff: the office keeps working when the internet is down (a bad line no longer means no records), there is no per-seat cloud subscription for the sync itself, and the data physically stays where you can point at it.

What you need to set it up

You do not need a server rack. In practice:

• The computers share one network: the same router, over wifi or ethernet. A small business router is plenty for a few chairs.
• Each machine runs the same software and is joined to the same practice.
• You decide which computers are allowed in, so a random device on the wifi cannot read the record.

It is closer to setting up a shared printer than to running a data centre.

What happens when a computer is offline

Good local-first software does not freeze when one machine drops off the network. Each computer keeps working on its own copy; when it rejoins, the changes made on both sides merge back together. The honest caveat is that if two people edit the very same field on two offline machines, the software has to pick a winner, so it is worth knowing how yours resolves that and keeping a routine backup regardless.

Networking in HM Praxis

HM Praxis is local-first and syncs over your local network, not the cloud. Each computer holds its own encrypted copy of the record, changes sync between the machines on the same network, and the whole thing keeps working offline, so the internet is never in the path of your patient data. You choose which devices join, and the record never leaves your office.

Read more about the dental practice software and how data ownership works, or the data custody guide for the technical detail, then try it free for 14 days.