3D printing in dentistry is routine for models, surgical guides, splints, temporary crowns and denture bases, and it is not routine for definitive ceramic crowns, which are still milled. Printed is not automatically better than milled. The two methods do different jobs, and current evidence is fairly clear about which does which. This article separates what is genuinely printed in Australian practices today from marketing, covers accuracy honestly, explains the regulation, and describes what you would actually notice as a patient.
Key takeaways
- Printed routinely: study models, implant surgical guides, night guards and splints, custom trays, temporary crowns and bridges, denture bases and aligner models.
- A 2025 meta-analysis in Materials found milled zirconia shows greater accuracy and reliability than printed zirconia, so definitive ceramic crowns are still milled.
- Pooled clinical data across 67 trial articles put computer-aided implant surgery at about 1.11 mm mean deviation at the entry point and 3.51 degrees angular deviation.
- Printed splint materials show significantly lower wear resistance than milled or heat-cured acrylic, so a printed night guard may need replacing sooner.
- Post-processing matters for safety: cytotoxicity of printed dental resins was significantly reduced only after washing for more than 15 minutes.
- The comfort benefit patients notice comes from intraoral scanning rather than printing, with 75 to 80 per cent of patients preferring digital scans in paediatric trials.
What dentists actually 3D print today
The routine list is shorter and less glamorous than the marketing suggests. In everyday Australian practice, printers produce study and working models, surgical guides for implant placement, occlusal splints and night guards, custom impression trays, provisional crowns and bridges, denture bases and try-ins, and the models over which clear aligners are thermoformed. Increasingly, denture bases are printed as a standard workflow rather than an experiment.
What is not routine is a printed definitive ceramic crown. Printed zirconia exists in research settings, and printed resin composite is being trialled for permanent restorations, but neither is the standard of care. If you are quoted a printed permanent crown, that is a conversation with trade-offs, not a technology upgrade.
Printed is not automatically better than milled
Milling and printing are different manufacturing methods with different strengths, and the evidence does not favour one across the board. A 2025 systematic review and meta-analysis of milled versus printed dental zirconia concluded that milled zirconia shows greater accuracy and reliability. Marginal gaps for milled zirconia averaged around 124 micrometres, closely comparable to optimised printed interim crowns at a similar figure, which tells you printing can reach interim-grade accuracy but has not displaced milling for definitive ceramics.
A scoping review in the Journal of Clinical Medicine reaches the practical conclusion: milling remains preferred for high-precision fixed prostheses, while printing offers advantages in material efficiency, complex geometries and removable applications. Material waste is one of the clearest differences, under 5 per cent for printing against 30 to 40 per cent for milling, because milling carves a restoration out of a solid block.
It is worth saying that most of these accuracy comparisons are laboratory studies. Trueness on a bench is not the same as fit in a mouth over years. If you want to understand how the materials themselves differ, our guide to types of dental crown materials covers what each is suited to.
What is printed, what is milled, and what you notice
The table below is the practical summary, including the limitation for each item rather than only the benefit.
| What is being made | Printed or milled today | What you notice as a patient | Main limitation |
|---|---|---|---|
| Study and working models | Printed routinely | Nothing directly, it replaces plaster behind the scenes | Dimensional stability drops noticeably after about three weeks of storage |
| Implant surgical guides | Printed routinely | A shorter and more predictable surgical appointment | Average residual deviation of around 1.4 mm at the tip, so a safety margin is still needed |
| Night guards and splints | Printed routinely, also milled and lab-processed | A well-fitting guard made without a plaster impression | Wear resistance significantly lower than milled or heat-cured acrylic |
| Temporary crowns and bridges | Printed routinely | A better-fitting temporary while the final is made | Short-term data only, and catastrophic fractures do occur |
| Denture bases and try-ins | Increasingly printed | Fewer visits and a physical try-in you can assess first | Milled bases outperform printed on flexural strength, hardness and fracture toughness |
| Clear aligner models | Printed routinely | Nothing visible, the aligner is what you receive | Precision decreases with each thermoforming cycle from the same model |
| Definitive crowns in printed resin | Emerging, not routine | Should be presented as a choice with trade-offs | A three-year trial of printed posterior bridges reported 40.7 per cent survival for mechanical failures |
| Definitive ceramic crowns | Milled, not printed | You would still be offered a milled ceramic crown | Printed zirconia remains behind milled zirconia on accuracy and reliability |
Surgical guides: where printing earns its place
Implant guides are the clearest win, and the numbers are good enough to quote. A meta-analysis of 67 clinical trial articles published in BMC Oral Health reports overall mean deviation of 1.11 mm at the entry point, 1.40 mm at the apex, and 3.51 degrees of angular deviation for computer-aided implant surgery. A network meta-analysis of immediate implant placement found fully guided static surgery reduced mean angular deviation by 1.85 degrees, platform deviation by 0.54 mm and apex deviation by 0.81 mm compared with freehand placement.
Guide design matters too. Tooth-supported guides were the most accurate static guide type, with mean angular deviation around 1.81 degrees, outperforming bone-supported and mucosa-supported designs. None of this makes guided surgery perfect. A mean apical deviation of 1.4 mm still requires planning space between the implant and nearby nerves or sinuses. Our article on guided implant surgery explains how the planning scan turns into the guide.
Night guards and splints: fast, but they wear
Printed splints fit well and can be produced quickly, which is genuinely useful when a guard breaks or is lost. The trade-off is durability. Laboratory testing published in the Journal of the Mechanical Behavior of Biomedical Materials found milled acrylic had the highest wear resistance, closely followed by heat-cured acrylic, with printed materials significantly lower. Build angle changes the result as well, with flatter build orientations producing better wear resistance.
For a heavy grinder, that difference is worth discussing before choosing. It does not make a printed guard a bad option, particularly as a fast replacement, but it does mean expecting a longer life than a lab-processed guard is unrealistic. Our comparison of a night guard and a sports mouthguard covers which appliance suits which problem.
Dentures: the process wins, the materials do not yet
Digital dentures show a genuine split between process and material. Systematic review and randomised data show computer-designed dentures achieved significantly better retention than conventional dentures, with fewer appointments and more predictable maintenance, largely because the design is stored and can be reproduced if a denture is lost or broken. A 2025 systematic review and meta-analysis in Scientific Reports found milled denture bases outperform printed and conventional acrylic on flexural strength, surface hardness and fracture toughness.
Clinical results are mixed in a way that deserves honesty. A pilot randomised trial of printed against conventional complete dentures recorded seven breakages, with one denture breaking four times, and six tooth debondings in the printed group. A randomised crossover trial found conventional dentures rated better by patients on phonetics, ease of cleaning, stability, comfort and overall satisfaction. All of those findings can be true at once, which is why a denture discussion should be about your priorities rather than about the machine.
Temporary crowns, and why permanent printed crowns are not routine
Printed provisional crowns perform well for what they are asked to do. A retrospective cohort study in Scientific Reports followed printed temporary crowns for a mean observation period of 256 days and found a 98 per cent survival rate, with two catastrophic fractures. For a temporary, that is a good result.
Definitive printed restorations are a different picture. A three-year prospective clinical trial of printed resin composite posterior fixed dental prostheses reported 40.7 per cent survival for mechanical failures, and 36.2 per cent when biological complications were included. A scoping review of additive-manufactured composite resins concluded they are not yet a first option for indirect restorations, citing insufficient mechanical properties, inconsistent bonding between layers and a lack of long-term clinical evidence. If you want to see how a conventional crown is actually produced, our piece on how your crown is made walks through the laboratory steps.
Post-processing is a safety step, not a finishing touch
What happens after a print finishes matters as much as the print itself. Research published in Polymers found cytotoxicity of printed dental resins was significantly reduced only after washing for more than 15 minutes, and that post-curing reduces but does not fully eliminate residual monomer. Prolonged rinsing, ultrasonic agitation, ethanol washing and glycerin immersion each improved biocompatibility measurably.
The practical implication is that two clinics using the same resin can produce different outcomes depending on process. This is a fair question to ask, and it is more revealing than asking which printer a practice owns.
How 3D printing is regulated in Australia
The Therapeutic Goods Administration regulates this, not any overseas body. A regulatory framework for personalised medical devices commenced on 25 February 2021, introducing definitions for patient-matched and adaptable medical devices, changing the custom-made device exemption and creating a medical device production system category.
Dental practitioners printing patient-matched devices have named exemption pathways. Patient-matched dental devices are exempt from inclusion on the Australian Register of Therapeutic Goods under a transitional pathway until 1 July 2029, and a separate low-volume pathway exempts a maker of five or fewer patient-matched devices of a kind in a financial year. Exemption from registration does not exempt anyone from the Essential Principles, record keeping, safety or advertising obligations. Because many in-house printed devices are not registered at all, describing one as approved by the regulator would be misleading.
What you actually notice as a patient
The scan, not the print
The best-evidenced patient benefit in this whole area belongs to the intraoral scanner. Randomised and crossover studies show digital impressions score higher on comfort, produce less gagging and less breathing difficulty, take less chairside time and are preferred by 75 to 80 per cent of patients in paediatric trials, with a systematic review in the European Journal of Orthodontics reaching the same conclusion. Our comparison of a digital scan and a traditional impression covers what the appointment feels like.
Fewer appointments, sometimes
Digital workflows can reduce the number of visits for some treatments, particularly dentures and guided implant work. How much depends on the case and the laboratory involved, so ask about your specific plan rather than assuming a general timeframe.
Better temporaries
A well-fitting temporary crown is more comfortable, less likely to come off and kinder to the gum while you wait. Lumi Dental has 3D printing and 3D scanning in the practice, and definitive ceramic crowns continue to be made in a dental laboratory.
Common questions
What do dentists actually 3D print?
In routine practice, models, surgical guides for implants, night guards and splints, custom trays, temporary crowns and bridges, denture bases and the models clear aligners are formed over. Definitive ceramic crowns are still milled. Printed permanent restorations remain an emerging option rather than a standard one.
Are 3D-printed crowns as strong as normal crowns?
Not yet for permanent restorations. A three-year trial of printed resin composite posterior bridges reported 40.7 per cent survival for mechanical failures, while printed temporary crowns showed 98 per cent survival over a mean 256 days. Printed resin and milled ceramic are not equivalent materials.
Is 3D printing more accurate than milling?
For high-precision fixed work, current meta-analyses favour milling. Printing wins on material efficiency, with under 5 per cent waste against 30 to 40 per cent for milling, and on complex or removable designs. The two methods are complementary rather than competing.
Are 3D-printed night guards good?
They fit well and can be made quickly, which suits a fast replacement. Laboratory testing consistently shows they wear faster than milled or heat-cured acrylic guards. For heavy grinding, ask about the trade-off before choosing.
Are 3D-printed dental devices regulated in Australia?
Yes. The Therapeutic Goods Administration personalised medical devices framework commenced on 25 February 2021. Practitioners making patient-matched devices must meet the Essential Principles, record keeping and advertising obligations even where an exemption from registration applies.
If you are weighing up a crown, a night guard, a denture or implant treatment and want the options explained without the technology sales pitch, the team at Lumi Dental in Melrose Park can talk it through. See what a first visit includes on our current deals page, ask for a written quote before anything is booked, or book online.
This article is general information only and is not a substitute for personal dental advice. Materials, techniques and regulatory requirements change, and the right approach depends on your own teeth and priorities. Please see a dental professional about your own situation.
