Case Selection for 3D Printed Restorations

Would you print this crown? Follow the findings that change the answer.

The patient wants to know whether the tooth can be restored in one visit. You are looking at a heavily restored lower molar with a fractured cusp, and a printed restoration is one of the options you could offer. Before you answer, the patient mentions that the previous restoration broke too.

That detail changes the conversation. You still need to restore the tooth, but you now need to understand what failed before choosing what comes next.

This hypothetical teaching case follows the decision as new findings emerge. It concerns resin-based printed restorations, including ceramic-filled resins; printed metal and fully ceramic restorations are outside its scope.

Case Selection for 3D Printed Restorations is the process of deciding whether a particular tooth, patient and intended restoration suit a specific printable material and its required workflow. In this case, the interesting question is what would make you proceed, pause or change your mind.

The first decision happens before you choose a resin

Return to the lower molar. A missing cusp tells you that something needs attention. It does not tell you whether the tooth needs an onlay, a crown or another approach, and it does not explain the previous failure.

You review the history, examine the remaining structure, investigate symptoms and assess periodontal and pulpal or endodontic status. You also look for findings that could change restorability.

For this example, assume that the assessment supports retaining the tooth and that full coverage is justified after considering more conservative options. The crown now has a clinical purpose: restoring this tooth after the more conservative alternatives have been assessed.

This distinction is especially relevant for root-filled teeth. The European Society of Endodontology identifies structural loss, cracks, tooth position, neighbouring contacts and occlusal factors as considerations in choosing the restoration. Root canal treatment alone does not select a manufacturing method.

Decide the extent of restoration from the tooth’s needs before selecting the production method.

If partial coverage can meet the clinical objective, the discussion in 3D Printed Inlays and Onlays becomes relevant. Here, however, a crown remains a reasonable design. The next question is whether the tooth is ready for the procedure you have in mind.

One margin changes the appointment

During your assessment, a deep distal margin becomes the immediate concern. The adjacent tissue is inflamed and bleeds when manipulated. In this hypothetical case, you cannot establish the contamination control needed for the intended cementation procedure.

You could continue comparing resins. You could also switch your attention to a milled crown. Neither choice would resolve the finding in front of you.

The appointment now needs a plan for the tissue and margin conditions, with appropriate interim protection while the cause is addressed.

This is where Case Selection for 3D Printed Restorations becomes clinically useful: it identifies the problem that must be solved before the material decision can move forward. The outcome today is “reassess after management,” rather than a premature commitment to a definitive restoration.

Being able to capture a margin digitally does not establish that you can manage it during cementation.

Now move the case forward. Assume that appropriate management has improved tissue conditions and that reassessment confirms adequate access and contamination control for the intended procedure. The reassessment matters: a plan to improve access is only useful if it produces the conditions the procedure actually requires.

You have removed one obstacle. You have not yet answered the patient’s original question. The crown still needs enough space, and the previous failure still needs an explanation.

The crown fits the screen, but does the material fit the case?

A search for 3D Printed Restorations Indications may show crowns, inlays, onlays and veneers. Those categories help you find candidate products. The decision becomes more precise when you open the instructions for the exact resin you intend to use.

Check the intended application, permitted design, relevant contraindications and requirements applicable in your country. For example, Formlabs lists those single-unit applications for Permanent Crown Resin and specifies a minimum thickness of 1.0 mm. That figure belongs to that product; it is not a universal preparation depth for printable restorations.

Suppose the crown design contains a thin area that cannot meet the selected product’s requirement. Do you reduce more tooth, revise the design or consider another material? The answer depends on the remaining structure and the clinical alternatives. The useful action is to reconsider the plan before committing to additional reduction.

For our molar, assume that the proposed design can meet the selected resin’s requirements without unnecessary further tissue removal. The material remains an option. You can now return to the detail that started the investigation: why did the previous restoration break?

The previous fracture needs more than a stronger material

A history of failure is a prompt to investigate. It is not, by itself, a diagnosis of bruxism. Review the previous restoration, available records and the patient’s account alongside the current examination. Assess contacts, the opposing dentition, structural support and findings relevant to parafunction.

In the teaching case, the patient reports possible night-time clenching. That report warrants assessment rather than an automatic conclusion. If concern about loading remains, it should influence how you compare materials and how confidently you discuss expected performance.

Here a study can help, provided it answers the right question. A 2026 prospective investigation of 30 posterior VarseoSmile Crownplus crowns reported 93% survival and 87% success at two years. It excluded probable bruxism, high caries activity and active periodontal disease, and had no restorative-material comparison group.

For this patient, the exclusions matter as much as the headline percentage. If your assessment supports probable bruxism, the study does not establish the outcome for that situation. It also does not show that prescribing a protective appliance makes the patient comparable to the study participants.

Before applying a survival percentage, ask whether the study included patients facing the same clinical problem.

This is a useful way to read evidence during Case Selection for 3D Printed Restorations. Ask what it tells you about the decision still unresolved. A favourable result in selected patients supports consideration; it does not remove the need to assess this patient’s circumstances.

The practical comparison is between named materials in achievable designs. Our 3D Printed vs Milled Restorations article explores that distinction. A manufacturing label alone cannot tell you which option is best suited to the loading conditions you have identified.

Before saying yes, check what happens after printing

Suppose the tooth, design and functional assessment now support considering the printed option. There is one more question: can your team deliver the process on which that choice depends?

Confirm the compatible equipment and prescribed washing, post-curing and finishing sequence. Formlabs warns that incorrect washing or post-curing can affect mechanical and biocompatibility properties. A smooth surface and an apparently good fit cannot verify the processing history.

Plan surface treatment and cementation for the actual resin. For example, the TriniQ instructions specify composite-based luting options for permanent restorations and contraindicate use in patients with known allergy to an ingredient. These are product-specific instructions, not a protocol to transfer automatically between materials.

Case Selection for 3D Printed Restorations comes back to the patient

You are now in a position to answer the opening question. The patient asked about speed. Your assessment has established what has to be true before speed can become a reasonable consideration.

If the margin can be managed, the design meets the selected product’s requirements, functional risks have been assessed and the supported workflow can be delivered, a printed crown may be discussed alongside appropriate alternatives. The 3D Printed Dental Crowns guide takes that crown-specific discussion further.

If the loading assessment remains uncertain or raises concerns that the available evidence does not adequately address, the case has not reached the same decision.

You may need further assessment or another restorative option. If the margin still cannot be managed, changing material alone will not solve the problem.

You can make the distinction clear to the patient: the crown is one part of the treatment, while controlling the conditions around it is another.

The choice remains open until both can be addressed. That explanation gives a reason for the extra assessment and a clear purpose to the next appointment.

A useful selection decision names both the proposed treatment and the finding that could change it.

Before agreeing on treatment, explain the remaining uncertainty and what follow-up would involve. “Permanent” describes intended use; it does not promise lifetime service. The discussion of Permanent 3D Printed Restorations explains that distinction in more detail.

The patient leaves with something more useful than a promise of a fast crown: an explanation of why the option is reasonable, what needed attention first and what will be monitored afterwards.

Three questions to take into your next case

When you next review 3D Printed Restorations Indications, translate the application list into questions about the person in your chair:

• Can I meet the material’s design and cementation needs while preserving tooth structure?

• Does the available evidence address the risks identified in this patient?

• What finding would make me change the plan?

Case Selection for 3D Printed Restorations becomes easier to explain when each answer follows from the examination. The technology enters a plan with a clear purpose, and the patient can understand how the choice was reached.

That connection between assessment and execution is worth developing alongside technical skills. Explore the 3D Printed Restorations Course at Designed by a Dentist to continue learning about the clinical workflow.

The detail that changes your answer

At the start, a fractured molar and a request for a quick restoration seemed to define the appointment. The margin condition and failure history made it a different conversation. Following those details gave each examination step a purpose and made the eventual treatment discussion more specific.

That is the practical value of Case Selection for 3D Printed Restorations: knowing which findings support the option, which need attention first and which require a different plan. The most useful answer to “Can we print this?” is the one you can explain for the patient in front of you.