Frequently asked questions about Dentra

To place an order, register on dentra.it with an invitation code provided by the lab. After your account is approved (usually within 24 hours), go to the Orders section and follow the guided procedure: select the type of work, upload your STL files, choose materials and finishes, and confirm the order. The system automatically calculates the quote before confirmation so you can verify costs and delivery times.

We accept STL files from any dental CAD/CAM system. For design orders, you can upload intraoral scans of the upper arch, lower arch, and bite in STL format. If you have files in other formats (PLY, OBJ, DCM), contact us to evaluate compatibility. No specific software is required: simply export the file from your scanner or CAD in open STL format.

CAD designs are delivered within 24 business hours from order confirmation, which corresponds to about 3 calendar business days (evenings, weekends and holidays are excluded from the count). You receive a 3D file ready for production in your own workflow: delivery is entirely digital. If you need faster turnaround, you can select the Rush option when placing the order.

Yes, when creating the order you can choose a delivery date earlier than the standard one. The tighter the timeframe, the higher the surcharge applied (up to a maximum of 30% of the order total, depending on how much you bring the delivery forward). The exact amount is always calculated and shown in the summary before confirmation, so you can see the cost of the extra speed right away. Priority is assigned immediately.

Dentra's design supports all major materials: zirconia in various translucencies and VITA shades, high-strength ceramics, PMMA, titanium, and resins certified for 3D printing (385nm and 405nm). Files are ready for production in the chosen material, with specifications compliant with European medical device regulations.

Yes, we offer a complete dental CAD design service. If you don't have CAD software or prefer to rely on our specialists, you can select the "Design" option when creating the order. Upload the intraoral scans (upper arch, lower arch, and bite) and our team handles the complete digital design. We specialize in Toronto Bridge design with custom frame and internal bar, as well as crowns, bridges, and implant structures.

Completed design files are available for download directly from the app as soon as the work is ready. You get a notification and can download them anytime from the Orders section. Delivery is entirely digital: no physical shipping, no shipping costs.

Yes, from your Dentra area you can monitor your order status in real time through all stages: from confirmation to design, from quality control to file delivery. Every status change is recorded with date and time. When the design is ready, you get a notification and can download the files from the app. You can access the complete history of all your orders from your Dentra area.

Invoices are issued monthly: everything you used during the month — delivered orders, pay-as-you-go tools and monthly plans — is grouped into a single invoice per client, issued at the end of the month. The amount is collected automatically via the SEPA direct debit you authorise once; if direct debit is not active, the invoice can be settled by bank transfer within 30 days. For Italian clients we also attach the ready-made electronic integration file (TD17) to import into your accounting software, as required for purchases from an EU supplier.

Payment is by SEPA direct debit from your practice's bank account. You sign the mandate once: from then on you receive a single invoice at the end of the month — orders and tools together — and the amount is collected automatically, with no bank transfer to make each time. We do not accept credit card, PayPal, or cash-on-delivery payments. If direct debit is not active, the invoice can be settled by bank transfer within 30 days, using the IBAN shown on the document.

To register on dentra.it, you need an invitation code, which you can request directly from the lab or through one of our representatives. Once you have the code, fill in the registration form with your business details: company name, VAT number, address, and contact information. Your account will be verified and approved by our team. Invitation-based access allows us to provide a personalized and dedicated service for dental professionals.

Account approval generally takes place within 24 business hours of registration. Our team verifies the submitted data (VAT number, company name) to ensure the app is used exclusively by dental professionals. You'll receive an email notification when your account is active. From that moment, you can access the app, view the price list, and start ordering.

Yes, the system automatically calculates the quote based on the materials, processes, finishes, and quantities selected. On the order summary page, you can view the full breakdown: base price, any surcharges for finishes or rush, and total. Invoices are issued by Hundredjack OÜ (EU) under the reverse charge mechanism (Art. 7-ter of Presidential Decree 633/72): VAT is accounted for by the customer, and for Italian clients we provide the ready-made integration file. You can modify your selections and see the quote update in real time before confirming the order.

You can reach us in several ways: by email at [email protected], or by using the contact form in the dedicated section of the website. For registered clients, you can also add notes and specific requests directly to the order. We respond to all inquiries within 24 business hours. The Dentra team is located at Via Pasubio 58D, Valdagno (VI) — we're also available for in-person meetings by appointment.

When each order is delivered, you receive a link to rate the work with a score from 1 to 5 stars and leave a comment. The feedback is used to improve service quality and evaluate the performance of the collaborators who worked on your order. The feedback system is an integral part of our quality control: each rating contributes to the collaborator's score and their advancement in the tier system (Bronze, Silver, Gold).

Yes, from your Dentra area you have access to the implant library with STL and XML files for major implant systems, available for free download. Files are organized by implant brand and model and can be imported directly into your CAD software for design. The library is regularly updated with new compatibilities. If your implant system is not listed, contact us and we'll add it.

Yes, we offer video consultations to discuss complex cases and plan treatments. You can request a video call directly from the app in the dedicated section. Video consultations are useful for discussing the design of complex cases such as Toronto Bridges, full-arch on implants, or anterior aesthetic rehabilitations. The Dentra technical team is available to analyze scans, propose design solutions, and agree on materials and finishes before proceeding with the order.

Peer review is our internal quality control system. Collaborators who reach the Gold level in the tier system can review their colleagues' work before delivery to the client. The reviewer checks the quality of the work, marginal fit, and the aesthetics of the restoration, providing structured feedback. For each completed review, the reviewer receives additional compensation. This double-check ensures consistently high quality standards on every order.

Yes. For each item in a delivered order, you can open a modification request directly from the app: open the 3D model of the work, activate the brush and draw on the areas to be fixed, then write a note describing what to correct. The request reaches the team with the visual context already prepared, avoiding misunderstandings. Rule: 1 modification possible per order item. If further adjustments are needed, the team will contact you to agree on next steps. This procedure covers voluntary agreed adjustments: for design errors attributable to Dentra (CAD file not clinically usable), the section "Design Errors and Reworks" of the Order Terms applies, providing free rework of the file by our team before clinical try-in.

Yes, WhatsApp is one of the main communication channels with the Dentra team and is the fastest way to clarify orders, materials, design, or delivery. All conversations with the official Dentra number are recorded in our internal system to ensure service continuity (even when your usual contact is off-shift). If you send us photos, scans, or documents, they are securely archived on European servers. For automatic notifications on order status, you can choose between email and WhatsApp from the app settings: by default we use email, but you can enable WhatsApp notifications if you prefer.

5-axis milling is a CNC process where the tool moves simultaneously on 5 axes (X, Y, Z plus 2 rotational axes), allowing undercuts and complex geometries to be reached in a single operation. In dental, this enables milling Toronto Bridges, implant bars, and structures with angles up to 30° without repositioning the workpiece. The result is superior marginal precision (±10 µm) and smoother surfaces compared to 3 or 4-axis milling. Dentra's design files are optimized for 5-axis milling.

The designation indicates the percentage of yttria (Y₂O₃) stabilizer in the zirconia. 3Y-TZP (3 mol%) has the highest flexural strength (~1,200 MPa) but low translucency: it's ideal for copings and posterior structures. 4Y-PSZ (4 mol%) balances strength (~800 MPa) and translucency: it's the most common compromise for monolithic posterior and anterior restorations. 5Y-PSZ (5 mol%) has maximum translucency, similar to lithium disilicate, but lower strength (~650 MPa): it's suited for aesthetic anteriors and inlays/onlays. Some multi-layer zirconia discs combine all three layers to optimize aesthetics and strength.

Dry milling works pre-sintered material ("green" or "white" state) without coolant: it's faster and used for zirconia, PMMA, and wax. The piece is then sintered in an oven at 1,450-1,550 °C, shrinking by 20-25%. Wet milling uses a water jet as coolant and works already-sintered or very hard materials (titanium, cobalt-chrome, glass ceramics). It's slower but doesn't require subsequent sintering. The choice between the two techniques depends on the material and restoration type.

A Toronto Bridge is a full-arch fixed prosthesis screwed onto 4-6 implants, replacing all teeth in an arch. Digital design starts from the intraoral scan or master model: first the internal bar (metal or zirconia frame that screws onto the implants) is designed, then the outer structure with the teeth. Dentra designs Toronto Bridges digitally, including a custom frame, internal bar with screw access holes, and teeth in layered or monolithic zirconia. The process includes clinical validation before definitive milling.

In dental, photopolymeric resins certified for medical use are used, divided by wavelength: 385 nm resins offer greater precision for fine details (diagnostic models, surgical guides), while 405 nm resins polymerize faster and are used for temporaries and devices for intraoral permanence. Class IIa certified resins (MDR 2017/745) can remain in the mouth for up to 2 years. The choice between the two technologies depends on the clinical application.

EU Regulation 2017/745 on Medical Devices (MDR) sets out the requirements for custom-made medical devices in the EU: traceability of materials and processes, technical documentation, declaration of conformity and post-market surveillance. In the Dentra workflow the roles are distinct: the design complies with the MDR requirements for traceability and technical documentation of the project, while physical production takes place at partner laboratories registered with the Italian Ministry of Health, which issue the declaration of conformity as manufacturers of the device.

Ceramic layering is the process of manually layering feldspathic or glass ceramic on the zirconia structure to reproduce the natural appearance of the tooth. The technician applies ceramic powders (dentin, enamel, transparent, opalescent) layer by layer, firing in an oven at 800-950 °C after each application. Colors and staining are used for chromatic characterization. Dentra designs both layered and monolithic solutions, defining morphology and chromatic characterization in the project. The monolithic alternative (without layering) involves coloring and glazing directly on the milled zirconia.

A surgical guide is a device that guides the surgeon in the precise placement of implants during surgery. It is digitally designed starting from the patient's CBCT (CT scan) and intraoral scan, planning the position, angle, and depth of each implant. The guide is then 3D printed with certified biocompatible resin and includes metal sleeves that guide the implant drills. This approach (guided surgery) reduces operating times, increases precision, and improves the predictability of results compared to freehand surgery.

Fixed prosthetics are cemented or screwed onto natural teeth or implants and cannot be removed by the patient: they include single crowns, bridges, veneers, and Toronto Bridges. They offer stability, chewing comfort, and superior aesthetics. Removable prosthetics (full or partial) can be removed by the patient for hygiene: they include complete dentures and skeletal frameworks with clasps or precision attachments. The choice depends on the clinical situation, the number of remaining teeth, and the presence of implants. Today the trend is toward implant-supported fixed solutions even for edentulous patients.

Immediate loading is an implant technique where the temporary prosthesis is placed on the implants within 24-48 hours of surgery, rather than waiting the traditional 3-6 months for osseointegration. This is possible thanks to implants with treated surfaces for high primary stability and temporary prostheses designed to distribute loads in a controlled way. Dentra supports immediate loading with dedicated CAD design of PMMA temporaries: like all designs, the file is delivered within 24 business hours of confirmation.

Restoration precision is measured by evaluating the marginal gap (distance between the restoration edge and the tooth preparation line) and the internal fit (adaptation of the internal surface). A clinically acceptable marginal gap is less than 120 µm according to the literature, but with 5-axis milling, values of 10-50 µm are achieved. Verification is done by optical scanning of the restoration and digital superimposition with the original model. Dentra verifies every design with digital quality control.

The digital workflow (intraoral scan → CAD → CAM) eliminates silicone impressions, plaster models, and wax modeling. The main advantages are: greater precision (digital scans have an accuracy of 10-20 µm vs 50-100 µm for traditional impressions), reduced times (the STL file reaches the lab in minutes), permanent digital archiving, real-time clinician-technician communication, and exact reproducibility of the restoration in case of remake. Dentra has worked exclusively digitally since 2017.