In-Office 3D Printing for Surgical Guides: What to Ask Before You Buy
Updated: Sep 24
Clinically reviewed by Jacob Shrayman, DDS, a general dentist who places implants using TrueGuide surgical guides in his own practice.
If you are looking at putting a 3D printer in your own office, there are three questions that decide whether it works out, and none of them is the one the sales conversation is about.
We build surgical guides for offices all over the country, and we also sell a chairside printer, so read this knowing which side we are on. What follows is what we tell doctors on the phone.
The accuracy number you are shown is usually not a guide
Accuracy is the first thing anybody talks about, and it is the claim worth slowing down on.
Most makers of dental printers publish no accuracy figure for a surgical guide at all. The figures that do get published are machine tolerances — measured on a test part, or on a model resin, under the maker's own conditions. A finished guide is a different object: large, thin, hollow, and shaped so that it has to seat on tissue or on teeth.
That is not a scandal. There is a good reason for it. Accuracy in a printed guide depends on the resin, the layer height, how the part was oriented on the platform, the support strategy, the wash solvent and soak time, the cure cycle, and the geometry of the guide itself. One number across all of that would be close to meaningless.
Which is exactly why we do not publish one either. If somebody quotes you an accuracy figure for guides, ask where it is published and what part it was measured on. If the answer is a slide, you have learned something about the number.
A speed claim for a crown is not a speed claim for a guide
Same pattern. Most published speed figures are general throughput — millimeters per hour, or a crown time — and you are left to assume it carries over to a guide. It does not carry over cleanly, because a crown is a small solid part and a guide is a large hollow one.
When somebody shows you a time, ask what was on the platform. TrueGuide Print prints a crown in about ten minutes, and its top speed is 60 millimeters an hour at a 0.1 millimeter layer. We say crown, because that is what we measured.
Open resin or locked resin is the question that costs the most money
This one gets discussed the least and matters the most, because it is not a specification. It is a business model, and it runs for as long as you own the machine.
Plenty of dental printers are locked to some degree. Some accept only the maker's own materials. Some use sealed capsules or chipped cartridges that the machine reads before it will run. Some publish an approved list and leave you to find out that the resin you wanted is not on it. In every one of those arrangements the printer is a one-time number on a quote and the resin is a bill every month, at a price you do not set.
TrueGuide Print is fully open. No chipped cartridges. No resin codes. No approved-materials list, because there is no list. Any resin that cures at 385 or 405 nanometers runs on it, and that is effectively every dental resin sold in the United States. You buy whatever is on your shelf, from whoever you want, at whatever price you negotiated.
There is a second consequence, and it is regulatory rather than financial.
The regulatory status belongs to the resin, not to the printer
You will see guide resins described as "FDA cleared." Most of the time that is the wrong phrase, and knowing why tells you how to read the rest of the marketing.
In the United States a patient-specific surgical guide falls under 21 CFR 872.3980, "endosseous dental implant accessories," product code NDP. That regulation puts the device in Class I, and it is exempt from premarket notification. There is no 510(k) to clear because none is required.
That is why careful companies say "FDA registered" or "FDA compliant" rather than "FDA cleared," and why you will not find a K-number for a guide indication on a resin datasheet. If somebody tells you their guide resin is "FDA cleared Class II," they are either using loose language or do not know their own regulatory status.
Here is why the open system matters for this. On an open printer, the paperwork you rely on is the resin's own — its US registration and its own instructions for use, which carry the wash solvent and time, the cure cycle, whether the part is single use, and whether and how it may be steam sterilized. You follow the document that came with the material you actually printed. We are not in the middle of that relationship, and we do not want to be.
What you are really buying
The printer is not the purchase. The purchase is the printer, a wash unit, a cure unit, resin — and a second resin, because guide resin and model resin are not the same thing — consumables, the autoclave you already own, and one person in the office who owns the process.
That last one decides whether this works. Printing is not hard. Printing consistently, on a Tuesday when the schedule is full and the assistant who normally runs it is out, is a different problem. Every office we have seen succeed at this has one person who owns it and one written protocol taped to the cabinet.
On TrueGuide Print, curing is built into the same machine, so that is one less box on the counter and one less thing to buy. You still wash the part before you cure it, the same as any resin workflow.
Does the printer decide whether the guide seats?
Less than the conversation suggests.
A guide that does not seat usually failed before anything was printed. The scan was taken over a tissue surface that moves. The CBCT and the intraoral scan were not aligned correctly. The guide is tooth-supported on teeth that flex. The part was cured in a way that pulled it. The doctor is seating it on a ridge the plan did not anticipate.
Print orientation and post-processing — how the part sat on the platform, how long it soaked, how it was cured — move the result more than the badge on the machine does. That is what we see in the cases that come back to us.
Which is the argument for owning the process rather than shopping the brand.
In-office or send it out
The answer is volume, and it is not close.
In-office earns its keep when you place implants most weeks, when you want to re-print the same afternoon a plan changes, when you are also printing models, temporaries and ortho appliances so the machine is not idle, and when you have somebody who owns it.
Sending it out is the better answer when you place a handful of implant cases a year, when your cases are full-arch, when you do not want to own a validation problem, or when the cost of one bad guide on the day of surgery is larger than everything you would save.
Most offices land in between: print the models and the short-span guides in house, send the full-arch and the complicated ones to the lab. That is a perfectly good answer, and almost nobody will tell you so, because everyone in this conversation is selling one side of it. We sell both sides, which is the only reason we can say it out loud.
What TrueGuide Print is
An all-in-one chairside unit. Printing and curing in the same machine. Build volume 80 by 70 by 80 millimeters. Layer thickness from 10 to 100 microns. Dual wavelength light source at 385 and 405 nanometers. Screen resolution 8520 by 4320. Four-inch color touch screen. 200 by 170 by 241 millimeters on the bench, under eleven pounds. USB or wifi.
It prints crowns and bridges, temporaries, surgical guides, denture bases, dies and ortho models. A crown comes off in about ten minutes.
On the restorative side, the material is a ceramic-filled hybrid resin, not a fired ceramic. That is the honest way to say it. It polishes well and it is meant for the indications in the resin's own instructions for use.
The honest limitation, and we would rather you hear it now than find out on a Friday: 80 by 70 by 80 millimeters will not hold a full-arch surgical guide. Single units, short spans, models and short-span guides — yes. A full arch — no. Send us the full-arch cases. That is what the lab is for, and your first guide with us is on us.
What to ask before you sign anything
Where is your accuracy figure published, and what part was it measured on? Not the slide. The specification page.
Is that speed claim for a guide, or for a crown? They are different parts.
Can I buy resin from anyone? If the answer has conditions, ask what a liter costs and multiply by five years.
What is included? Wash, cure, first resin, vats, training, warranty. Get it in writing.
Who dials in the settings for the resin I actually want to use — you, or me?
Where is the resin's instructions for use? That document, not the brochure, governs the device that goes in a patient's mouth.
Bottom line
Buy on two things: whether you are allowed to shop for resin, and who in your office owns the process. Then stop worrying about the machine, because the guide that does not seat almost never failed at the printer.
If you want the record specification that keeps cases out of trouble in the first place, that is in CBCT and scan records for guided surgery. If you want to know why a guide does not seat, that is in When a surgical guide does not seat.
Specifications current as of September 2026. Nothing here is a treatment plan or medical advice.
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