NEW! Prostheses printed from resin - now available in our offer!

Frequently Asked Questions

Why is it worth cooperating with our company?

Cooperation with Primomill® Milling and Laser Sintering Center guarantees quality, timeliness, and modern solutions. We are among the first in the market to introduce advanced technologies in the production of prosthetic semi-finished products. Primomill® consistently invests in innovation to provide comprehensive service offerings for dental laboratories and technicians. With Primomill®, you receive not only precisely manufactured elements but also full technical support, reliable delivery times, and a partnership approach at every stage of cooperation. We focus on quality that is visible – and valued by our clients.

Do you ship work to other countries?

Yes, we handle shipments to European Union countries. We serve international partners with full commitment, ensuring timeliness and safe transport of completed work. For detailed information regarding conditions and costs of international shipping, we encourage direct contact with our office.

Who are your partners?

We cooperate with renowned material suppliers and manufacturers of prosthetic equipment and components, both from Poland and abroad. Our partners are companies that, like us, focus on quality, reliability, and innovation. This allows Primomill® Milling and Laser Sintering Center to offer solutions compliant with the latest industry standards and provide our clients with proven and compatible technologies.

What implant systems do you use and which ones can you mill?

At Primomill® Milling and Laser Sintering Center, we handle a wide range of implant systems available in the European market. Thanks to our extensive library database and advanced CAD/CAM software, we can mill prosthetic elements compatible with most popular implant systems. Importantly, we also work with original components supplied by implant system manufacturers, ensuring the highest precision, safety, and technological compatibility. For less standard solutions, we invite you to contact us — we'll be happy to check the possibilities of completing work according to individual requirements.

What's the difference between zirconia MO and LT?

Zirconia MO (Medium Opacity) is characterized by low translucency, making it very effective at masking tooth discoloration, dark stumps, and implants. It's suitable for work requiring greater coverage and stable color foundation. On the other hand, zirconia LT (Low Translucency) has medium translucency, allowing for a more natural aesthetic effect. Due to its good balance between strength and aesthetics, zirconia LT is often used in extensive constructions and prosthetic bridges. Material selection depends on the clinical situation and expectations for the final effect.

Has the work been shipped already?

Every Primomill® Milling and Laser Sintering Center client has an individual client account on our website. After logging in, you can easily and quickly check the status of currently ongoing work, shipping information, and whether the work has already been shipped. Additionally, the system provides access to the complete order history, facilitating control and planning of further cooperation.

What is zirconia etching?

Zirconia etching is a chemical or mechanical process of preparing the zirconia surface before cementation or ceramic firing. The purpose of this process is to increase adhesion by removing the surface layer and creating micro-cracks that improve the retention of bonding materials. At Primomill® Milling and Laser Sintering Center, we use the specialized ZIRCOS-E system for zirconia etching, which ensures high effectiveness and safety of the entire process. Properly performed zirconia etching is crucial for the durability and stability of the final prosthetic work.

When can a glass support be made?

A glass support is made when a prosthetic bridge contains more than two pontics or an additional cantilever pontic is planned — meaning more than one piece. It's used to strengthen and stabilize the construction to improve chewing force distribution and prevent excessive loading of bridge elements. The condition for making a glass support is healed gum tissue in the area where the support will rest, as well as the presence of natural antagonist teeth or fixed restorations such as metal-ceramic or zirconia bridges. At Primomill® Milling and Laser Sintering Center, every decision to make a support is preceded by technical analysis — ensuring safety and long-term functionality of the work.

What is a zirconia blocker and when is it used?

A zirconia blocker is a special material in liquid or paste form, used during zirconia staining to mask discoloration, dark tooth stumps, or implant components that could show through the semi-transparent crown or bridge structure. Its main task is to block unwanted colors and create a more neutral background for the ceramic layer or firing. At Primomill® Milling and Laser Sintering Center, we use blocker when the clinical case requires better coverage — especially in aesthetic zones or with thin prosthetic structures. The choice of appropriate blocker type depends on the zirconia system and expected final effect.

What is the maximum number of pontics a zirconia construction can have?

At Primomill® Milling and Laser Sintering Center, we make zirconia bridges with extensive spans, including full arches. However, according to material manufacturer recommendations, we do not recommend exceeding two pontics between abutments. We can make such constructions, but only without warranty. Primomill® is not responsible for the durability of such construction, as the material manufacturer does not guarantee its strength under clinical conditions. In such cases, we suggest alternative technical solutions or consultation with our technical team before completing the work.

Are clasps in skeletal prostheses elastic in laser sintered structures?

Yes, clasps in skeletal prostheses made with laser sintering show appropriate elasticity, provided they are properly designed in terms of length, thickness, and width of the retentive arm. The elasticity of clasps is also influenced by the chemical composition of the metal powder used, which determines the mechanical properties of the finished construction. Laser sintering enables very precise geometry reproduction and ensures structural uniformity, which translates into durability and stability of retention. At Primomill® Milling and Laser Sintering Center, we pay special attention to designing clasps in skeletal prostheses to ensure proper retention and long-term functionality.

Where can I find cement settings for milled and sintered work?

Cement settings for milled and sintered work are available on our website in the "Cooperation" section. You can access them directly via the link: https://primomill.com/en/cooperation — there you'll find ready parameters for systems such as EXOCAD, DENTALWINGS, and 3Shape. At Primomill® Milling and Laser Sintering Center, we also provide individual technical support – in case of questions, our technicians will be happy to help select appropriate settings for specific cases.

How to check if ceramics are suitable for work with our laser sintered product?

To ensure that a given ceramic is suitable for work with a construction made using laser sintering technology, you should check the ceramic manufacturer's recommendations regarding work with metal substructures — especially regarding the coefficient of thermal expansion (CTE). At Primomill® Milling and Laser Sintering Center, we recommend using ceramics intended for chrome-cobalt alloys with standard CTE. Information about which chrome-cobalt powder our structures are made from can be found on our website in the "Materials" section: https://primomill.com/en/materials

Do I need to apply bond before firing ceramics?

Yes, in the case of metal constructions — especially those made with laser sintering technology — it's recommended to apply bond before firing ceramics. Bond creates an intermediate layer that improves ceramic adhesion to metal, increases connection durability, and reduces the risk of chipping.

Do I need to perform oxidation before firing work?

Yes, in the case of metal constructions, it's recommended to perform oxidation before the first ceramic firing. Oxidation allows for revealing any contaminants on the metal surface and improves bonding of the ceramic layer with the substructure. This process increases connection stability and reduces the risk of defects in fired ceramics.

How to connect a skeleton construction with ready modular parts (gum + teeth)?

To properly connect a skeleton construction with ready modular parts, you should use cold-polymerized acrylic material. Before joining elements, surfaces should be sandblasted and thoroughly cleaned, then prepare a working model with appropriate isolation to prevent uncontrolled connection with the model. The remaining stages of work with printed elements proceed analogously to traditional acrylic prostheses — through standard mechanical processing and manual polishing. At Primomill® Milling and Laser Sintering Center, we recommend this method as durable, proven, and technically safe for connecting our structures with modular gingival-dental parts.

Why choose TrueDent 3D printing technology for simultaneous dental prosthesis printing?

TrueDent 3D technology is a revolutionary solution that completely changes the approach to dental prosthesis production and acrylic elements for skeletal prostheses. It works particularly well in implant constructions, where it's used both for making temporary prostheses and permanent acrylic restorations, ensuring fast, precise, and aesthetic results. Its huge advantage is the ability to simultaneously print gingival and dental parts as one, unified element. Teeth are not glued or mechanically embedded — they form a cohesive whole with the plate, eliminating the typical problem of teeth falling out of prostheses. The risk of damage occurs only in case of cracking the entire construction, which happens extremely rarely. The TrueDent system also allows completely eliminating the stage of working with plaster, water, and other dirty materials, significantly streamlining the process and improving cleanliness and work organization in the laboratory. Additionally, any repairs of prostheses made with this technology can be performed using cold acrylic, analogously to classic acrylic prostheses. At Primomill® Milling and Laser Sintering Center, we treat TrueDent as a true breakthrough in simultaneous printing — reliable, clean, and modern.

Can prostheses made with TrueDent technology be relined?

Yes, prostheses made with TrueDent 3D technology can be relined without problems, both by indirect method in the laboratory and directly in the patient's mouth — depending on the clinical case. Standard cold acrylics are used for relining, similar to classic acrylic prostheses. The prosthesis surface before relining should be appropriately prepared — cleaned and matted to ensure good adhesion of the new material layer. At Primomill® Milling and Laser Sintering Center, we recommend checking prosthesis fit before performing relining and consulting any changes with the treating physician.

What is laser sintering?

Laser sintering (SLM – Selective Laser Melting) is a modern additive technology in which metal constructions are created layer by layer through selective melting of metal powder using a laser beam. In dental prosthetics, this technology is mainly used for making skeletal prostheses, crowns, bridges, and constructions for ceramics, with high precision and repeatability. At Primomill® Milling and Laser Sintering Center, we use high-quality chrome-cobalt powder, which ensures durability, biocompatibility, and precise reproduction of the digital design. Laser sintering eliminates many defects of traditional casting, such as air bubbles or deformations, and allows for realization of even the most complex prosthetic constructions.

What is the payment method?

The payment method at Primomill® Milling and Laser Sintering Center works as follows: A new client who places their first order with us receives work cash on delivery and settles directly with the courier upon receiving the shipment. Regular clients settle with us based on individual invoices or a collective invoice at the end of the month, which significantly simplifies accounting and eliminates the need to make a transfer after each completion. If a regular client wants to switch to settlement in the form of a collective invoice, please contact the office to arrange this option.

What is the shipping cost?

At Primomill® Milling and Laser Sintering Center, the standard cost of courier shipping within Poland is 15 PLN — this also applies to shipments scheduled for Saturday. If the client needs express and guaranteed delivery by 12:00 PM the next business day, the cost of such service is 40 PLN. For orders worth more than 500 PLN gross, we cover the shipping cost — the shipment is then free. For international shipments, the cost is determined individually based on the carrier's price list and delivery country.

What are the work completion deadlines?

Completion deadlines at Primomill® Milling and Laser Sintering Center depend on the type of order, project source, and degree of processing. Below we present detailed completion times:
  • Laser sintering from client's STL file – next business day shipment, with or without processing
  • Skeletal prostheses (sintering): without processing – up to 2 business days, with processing and polishing from client's STL file – up to 3 business days, designed by us, with processing and polishing – up to 5 business days
  • Zirconia constructions: from client's STL file – next business day shipment, designed and milled by us – up to 3 business days
  • Milled constructions from chrome-cobalt or titanium: from client's STL file – up to 2 business days, designed by us – up to 5 business days
  • Individual connectors: from client's file – next business day shipment, designed by us – up to 3 business days
  • Prostheses and elements printed in TrueDent system: designed by client – next business day shipment, designed by us – shipment up to 3 business days
STL files should be sent using the individual client account on our website. Business day lasts until 5:00 PM. Files sent after this time will be treated as orders from the next day, except for zirconia constructions up to three points — these may still be qualified for completion the same day, provided they are entered into the system no later than 12:00 AM. For complex or non-standard orders, deadlines may vary — each work is confirmed individually after receiving files or models. If express completion is needed, please contact the office in advance. Note: The indicated completion deadlines are maximum deadlines. Actual completion time may be shorter, depending on current workload.

How to send work to you?

To submit an order to Primomill® Milling and Laser Sintering Center, you need to log into your individual client account on our website. There you can upload STL files, assign them to specific orders, and track work completion status. File upload is possible 24/7, while our business day lasts until 5:00 PM. Files sent after this time are registered as orders placed the next business day — except for zirconia work up to three points, which may still be qualified for completion the same day if they reach the system by 12:00 AM. Orders for work performed on plaster models we accept in the form of physical working models sent by clients. Such work is entered into the system on the day of their physical delivery to our center.

How to file a complaint?

Complaints at Primomill® Milling and Laser Sintering Center can be filed quickly and systematically — preferably by email or phone, contacting our office directly. To speed up complaint processing, please send: order number or client name, brief description of the problem, photos illustrating the defect (if applicable), and – if necessary – return the construction to our center. Each complaint is considered individually and thoroughly, and our team always strives to find the fastest and most satisfying solution.

How can I contact your company?

You can contact Primomill® Milling and Laser Sintering Center in several convenient ways: By phone – our customer service team is available during office hours and will be happy to answer any questions. By email – you can write to us, send inquiries, orders, or technical documentation. Contact details can be found on the website: primomill.com. We also encourage using the individual client account, where you can check order status and communicate with our team directly through the system.

Do you offer design assistance? Do you help solve technical problems with work?

Yes, our team provides support in case of doubts regarding the project. We can suggest necessary corrections or point out potential errors in the file that need to be corrected before completion. The client receives feedback and is asked to send the corrected STL file – only after its acceptance do we begin work.

Can an order be cancelled after it's been sent?

The client cannot independently cancel an order from their account level, because after placing it, the order automatically goes into production and the manufacturing process may begin immediately. In case of needing to withdraw from work, you should immediately contact our office — by email and phone. If production hasn't started yet, there's a possibility of cancelling the order. However, if the work has already been completed or started, cancellation will not be possible.