Robust Inlay/Onlay

  • Precise fitting, long-lasting 

  • Aesthetically appealing

  • It ranges from E.max Inlay/Onlay, Composite Inlay/Onlay

  • Not very durable, often lasting for 2 years

  • 5 years warranty guarantee

China Inlay/Onlay Manufacturing Service

Inlay/ Onlay is a good choice when a patient has a damaged molar tooth. In the past, dentists would remove the decayed part of a natural tooth, and then filled the tooth with metal. However, this kind of fixing was not long-lasting. Besides, frequently filling the natural tooth would bring further damage to it.

Robust has specialized in producing different types of E.max Inlay/Onlay, Composite Inlay/Onlay. All our Zirconia Crowns have 5 years warranty. Several ways are available in Robust to produce the Zirconia Crowns, like CAD/ CAM, Traditional Way, our in-lab manufacturing time is as soon as 4 days.

Inlay/Onlay Types

E.max Inlay/Onlay

Usually, there are PFM, metal, and zirconia Inlays/Onlays. However, most of our current Inlay/Onlay cases are made of E.max material, because it is natural-looking, durable, and totally bio-compatible.

Composite-Onlay

Composite Inlay/Onlay

Inlay/ Onlay made of composite material is getting popular among patients. It is bio-compatible and natural-looking. The biggest advantage is that composite material allows dentists to easily repair the prosthesis by themselves. It can be frequently repaired if the prosthesis wears out over time.

Robust Inlay/Onlay Specification

Product: Inlay/ Onlay
Material for Inlay/ Onaly copings: IPS E.max Ingots, Composite (SHOFU)
Material for Ceramic: E.max Ceram
In-lab manufacturing time: 4 days
Way of manufacturing: CAD/ CAM, Traditional way
Design software: 3 Shape
Our Scanning Device: Shining 3D
Our Model Printing Machine: MoonRay
Our Milling Machines: Roland DWX- 51D/  X-mill 220
Warranty: 5 years
MOQ: 1 case

Equipment & Material

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1. What are dental inlays and onlays?

The traditional approach is to replace fillings with inlays to compensate for the tiny loss of tooth structure caused by caries. Like fillings, inlays can be inserted into teeth and are usually made of gold only. Inlays and onlays, often called partial crowns, are often used to restore teeth, strengthen them, and prevent further damage. Existing teeth will serve as the foundation, inlaid or embedded on top.

Inlays are used without damage to the tip of the tooth, and the inlay can simply be placed on the tooth. When the damage is relatively large, a cover layer is used. First, the caries are removed, then a mold is made of the caries and sent to the dental laboratory. Then use porcelain, gold or composite resin to create a restoration that fits perfectly in your mouth. A fix usually takes 2-3 weeks to create, during which time you will install a temporary fix. Once the restoration is complete, it sticks to the existing tooth, giving you a powerful invisible connection to a whole, healthy tooth.


1) Dental inlays

Today, inlays are still used in the same situation, but inlays can be made of tooth-colored materials such as ceramics or special dental composites. Defective or unsightly “fillings” can be replaced with inlays of the same color as the teeth and glued to the teeth. This bonding process can actually add strength to the tooth, helping to seal the inlay to the tooth.

2) Tooth inlays

Onlays can also be embedded in the teeth, but can also extend into the chewing surface of the posterior teeth, replacing one or more cusps. In the past, onlays were solid gold, but as with onlays, more and more patients are requesting tooth-colored onlays. Doing a porcelain/porcelain inlay allows the restoration to stick to the tooth. This bonding process can actually increase the strength of the tooth and help seal the overlying layer with the tooth. It is difficult to determine when an inlay or inlay can replace a crown or cap. Ask your denture doctor if you are suitable for tooth-colored inlays or inlays.

2. Why do I need an inlay/inlay?

There are many reasons to use inlays and onlays in place of fillings or crowns, such as:

  • Repair large cavities and weak teeth caused by cavities, failed fillings or cracked teeth
  • instead of padding like composite
  • instead of crowns, as inlays/onlays are less invasive and require less tooth preparation
  • Avoid root canals, posts and crowns in case of insufficient teeth
  • Deep hole below the gum to ensure a good edge seal

3 shown. What are the characteristics of inlays/onlays?

  • Exterior. They have a very attractive natural appearance, unlike amalgam, and are less prone to staining and discoloration than white filler materials. Porcelain can not only be stained to mimic natural teeth, it can also reproduce the pattern of the bite surface by adding a little stain.
  • the power of. They do not cause damage to the remaining teeth like crowns do, and by preserving most of the natural tooth, they add strength to the tooth.
  • The inlay material is very durable and will not wear out like the filler even under grinding pressure.
  • decay. Their edges do not rot easily and because they are custom made, they achieve a good seal.
  • Durability. They are more durable and last longer than fillers.
  • healthy. Because they’re custom-made for each tooth, they won’t lock in fillings like plaque, making them easier to keep clean.
  • Stablize. They do not expand and contract like filling materials to reduce pressure on the teeth.

4 shown. What is the difference between dental fillings and inlays, onlays and crowns?

1) Dental fillings and inlays

In theory, the two methods can be used interchangeably, but tessellation is often used for larger spaces. Both methods require removing the existing caries and then filling them with a drill, but the way the caries are filled is their main difference. During the filling process, the space is filled with amalgam or composite material, which is a faster process and requires only one visit.

With inlay, the space is filled by a single, usually laboratory-made, solid part, usually made of a material such as gold or ceramic. The inlay must be made precisely to the shape and size of the void, otherwise food and bacteria can enter the void and cause further decay. The advantages of inlays are that they do not shrink like fillings after placement, there is less chance of restoration failure, and there is less gap between the filling and the surrounding tooth structure. Inlays also produce harder and theoretically more durable surfaces when chewed, so they should be more reliable in the long run, although the data on this is mixed and inconclusive.

2) onlay vs Crowns

This is your primary single tooth restoration that remains in the larger carious area and because of the amount of tooth structure, fillings or inlays can’t work because they have to be removed. The main difference between onlays and mosaics is that onlays cover the tips, while mosaics only fill the areas between the tips. The cavity is still drilled from the tooth, and an onlay is created based on the size and shape of the cavity. Instead, the crown covers the entire occlusal surface of the tooth, as well as the tooth structure above the gum line.

Onlays are a less aggressive restoration method than artificial crowns because less tooth structure needs to be removed to place the onlay. The cost is about the same, but onlay is a little cheaper than crown. So, where possible, tessellation is actually the preferred restoration method. However, it is important to note here that onlays are more difficult to perform correctly and are more dependent on the skill of the dentist.

5. What are the types and main uses of inlays?

Here are some common mosaic types:

  • Porcelain (there are different subtypes)
  • gold
  • complicated

Most inserts are now made of porcelain, a result of the growing desire for more natural teeth and the improved ability of restorations to stick to teeth. Like tessellation, tessellation is an indirect restoration. The difference, however, is that the inlay is an indirect restoration. restoration. repair without the canine overlay, which is on the inside of the tooth. Hyperonlay is a kind of prosthesis that indirectly covers the tooth body and cusp.

Mosaic indications:

  • teeth that have been extensively repaired or weakened
  • Multiple fractures or previous failure of direct repair
  • Restoration of teeth without cusp coverage
  • Difficulty obtaining good contours, contact points or occlusion using direct restorations

6. What are the advantages and disadvantages of dental inlays?

Here are some of the main advantages and disadvantages of dental inlays:

1) Advantages of tessellation

Inlays are an indirect repair (fill) method used to repair large areas of damage or voids. Inlays have several advantages over traditional (direct) fillings:

  • The inlays are very strong and durable: especially well-made gold inlays, with proper care, have an extraordinary longevity
  • Inlays give restored teeth a natural, aesthetic appearance: Ceramic inlays can make restored teeth almost indistinguishable from surrounding natural teeth
  • Compared with traditional resin composite posterior fillings, ceramic inlays have better physical properties. Because ceramic inlays are custom-made for the patient in the laboratory, ceramic inlays allow dentists to achieve better contours, contact points and occlusion than direct fillings
  • Resin inlays have less microleakage (diffusion of bacteria/oral fluids between the tooth and filling material) and lower postoperative sensitivity than direct resin composites.

2) Disadvantages of Mosaic

Inlay is a very popular restorative technique used to preserve dental material and provide greater strength than restorations. The most common inlay materials are composite resin and ceramic materials. Both types have different properties, but the general disadvantages of tessellations include:

  • Higher cost compared to restoration due to the need for a dental laboratory
  • Extending the procedure by requiring two appointments, i.e. increasing the time the patient spends in the wheelchair
  • Complications such as edge leakage and food staining can develop over time
  • Difficult to guarantee tooth preparation without dents, high technical sensitivity
  • Composite or ceramic inlays are not as strong as materials such as gold
  • There is a risk of loss of vitality from tooth extraction
  • Longer than repair, but may need to be replaced
  • ceramics are fragile
  • Difficulty in repairing inlays

7 is shown. How are inlays and onlays applied?

Inlays and onlays require two appointments to be completed. At the first inspection, the filling of the filling is replaced, or the damaged or corroded area of ​​the tooth is removed, and the tooth is prepared for an inlay or inlay. To ensure a correct bite, a dentist will make an impression of the tooth, which is sent to a laboratory for fabrication. The dentist will then apply a temporary sealant to the teeth and schedule the next appointment.

The temporary dental sealant is removed at the second appointment. Camille will then make sure the inlay is installed correctly. If the match is satisfactory, the inlay or inlay will be glued to the tooth with a strong resin and polished to a smooth finish.

8. What are the considerations for inlays and onlays?

Traditional fillings can reduce the strength of natural teeth by 50%. As an alternative, bonding inlays and onlays directly to teeth using special high-strength resins can actually increase tooth strength by 75%. Therefore, they can be used for 10 to 30 years. In some cases, an onlay is a good option if the damage to the tooth is not sufficient to restore the entire crown.

9. What are the signs that dentures or dentures are needed?

Inlays/onlays refer to fragile and extensive dental restorations. Between the two, there is no clear contrast. Due to the strength of metal inlays, inlays are often used when the integrity of the direct filler is repeatedly compromised. It also shows that when placing direct restorations it can be challenging to achieve satisfactory parameters (shape, edge, occlusion). They are usually used for larger cavities because in current practice tooth protection is paramount and small cavities can be replaced with direct composites.

An onlay is a condition where the fragile tooth structure needs to be protected without the need for additional extraction of dental tissue such as crowns, such as restoring a tooth to cover a canine after root canal treatment. It can also be used if the remaining coronal tissue has a small outline and little retention.

10. How do I prepare to use inlays and onlays?

The preparation of mosaics and inlays mainly follows the basic concept of indirect restoration. The purpose of tooth preparation is to preserve more tooth tissue than crown preparation, while giving adequate protection to the tooth. The opposite cavity wall preparation should be done in a dent-avoiding manner in order to obtain the best preservation of indirect repair from the cavity shape. For all-ceramic inlays and inlay preparations, these cavity shapes may be slightly over-tapered, as most of the retention comes from the cement lute. However, for indirect restorations using gold, then the prepared shape must have parallel walls, as most of the retention comes from the void shape.

The preparation and cementation process of the inlay or inlay is usually carried out in two appointments, with preparation in the first appointment and cementation in the second appointment. After the teeth are prepared at the first inspection, the prepared teeth should be putty and rinsed impressions before being sent to the laboratory for indirect restoration. Additionally, temporary restorations can be performed with materials such as ProTemp to protect teeth from sensitivity, loss of viability and bacterial contamination, prevent over-eruption of prepared teeth, and temporarily maintain their esthetics.

Tooth preparation begins with occlusal reduction, which ranges from 0.5mm to 2mm depending on the restorative material used. The best tool to use this is a high speed diamond splinter and reduce the inclination of the tip and groove should be followed as this will allow more tooth tissue to be preserved. A functional occlusal bevel should be established at the occlusal load tip of the molar, holding the spur at a 45-degree occlusal surface. This is the buccal cusp of the lower teeth and the palatal cusp of the upper teeth. A high-speed conical diamond drill with the most convenient shape to prepare buccal, lingual and proximally reduced teeth.

In most clinical situations, inlay preparations are made from teeth that have already undergone a Class II restoration and are prepared to protect the teeth. Remove the repair first, then convert the cavity by making sure to eliminate any undercuts from the preparation. There are two ways to do this, either by plugging the groove with an adhesive restorative material, or by removing the tooth tissue to create the desired divergent cavity.

11. How to apply mosaics/onlays?

Here we will show you step by step how to apply tessellation and onlay:

Step 1 – Remove Cavity Filler (if necessary)

Often, inlays and onlays can replace cracked or damaged cavity fillers.

If you have a filling in your tooth, your dentist will remove the filling before putting it in. Any cavitated tooth tissue is also removed, leaving a “cavitated” tooth cavity.

Your dentist then prepares and shapes your teeth for easier placement of inlays or inlays.

Step 2 – Tooth Imprint (Inlay/Inlay Mould)

At the first inspection, mold the cavitated or damaged teeth. This mold can help you and your dentist decide which material to use for inlay or inlay (gold, ceramic, or composite). If you choose ceramic, you will also choose the shade of restoration on this visit.

Step 3 – Temporary Filler Placement

Temporary packing is placed to seal the cavity when preparing the inlay or inlays. This helps prevent further caries and protects your teeth from thermal irritation (sensitivity caused by hot and cold fluids).

Step 4 – Tessellation / Tessellation Placement

After the restoration is complete, you will make another appointment with the dentist to place the inlay for you. During this appointment, the dentist will administer local anesthesia (only when needed) to reduce pain and increase comfort. Then, the temporary filling is removed from the cavity and the inlay or inlay is glued to the tooth.

Dentists can often remove temporary fillings and place inlays or inlays without significant discomfort. Mounting and inlaying of ceramics and composites is now possible in the office with CAD/CAM technology and milling machines like CEREC. This is the same technique used by dentists to create “same day” crowns. In these cases, you’ll go through steps 1 and 2, skip step 3, and go straight to step 4, all in the same visit.

12. What is the lifespan of an inlay/inlay?

Inlays and onlays are considered long-term solutions for restoring teeth. They typically last as long as crowns (about 20 years) and much longer than traditional fillings—provided they’re used properly and your hygiene is compliant.

As always, there are many factors to consider when talking about how long something will last:

Dentists: their experience, materials used for inlays, impressions, cement used for bonding, techniques, etc.

Laboratory Technicians – their experience, materials used, quality of work, etc.

Teeth – how much of the tooth is left, the state of the nerves, how well it supports, bite force, etc.

You – access area, saliva control, oral hygiene, etc.

Long-term data on the subject are scarce, and, as ever, this study is fraught with problems and difficulties in keeping dentist and patient variables consistent to produce any meaningful results.

13. How to prolong the life of dental inlays and onlays?

The recovery time for inlays and inlays is only a few days. However, your teeth are still prone to plaque and oral bacteria over time. To keep restorations clean and strong, good oral hygiene is essential.

To reduce the chances of developing oral diseases, dentists recommend the following tips:

The inlay extends into the interdental area (between the teeth) of the mouth.

These areas are difficult to clean and require regular interdental cleaning, such as flossing and interdental toothbrushes. Basic oral care is also necessary, such as brushing twice a day and gargling with mouthwash to kill bacteria.

After the inlay or inlay is placed, the patient should reduce sugar intake.

Additionally, dentists recommend avoiding highly acidic foods and beverages. This includes candy, coffee, dairy products, dark fruits and processed foods.

Inlays and onlays should be routinely checked by a dentist every six months. During these appointments, the dentist will examine the restored tooth for signs of leakage, damage, and disease. While your inlay or onlay will eventually need to be replaced, there are a few other things you can do to extend the life of your restoration. Following these guidelines can help you better prolong the life of your dental inlay or inlay:

Brush your teeth at least twice a day. To keep harmful bacteria away, thoroughly clean your teeth two to three times a day, preferably around 30 minutes after each meal.

Use dental floss daily. Cleaning between your teeth helps reduce plaque, tartar and hard-to-reach bacteria.

Use fluoride toothpaste. Fluoride helps remineralize tooth enamel, protecting teeth from further damage. We also recommend purchasing a non-abrasive formula that won’t scratch your repair.

Change your bad habits. Do not chew pencils, bottle caps, or ice cubes. Don’t bite your nails. These habits can damage your natural teeth as well as inlays and onlays.

Avoid hard or sticky foods. Toffee and caramel can disrupt repairs, while hard foods like nuts or popcorn can cause repair cracks.

See your dentist regularly. During routine inspections and cleanings, your dental team can evaluate your restorations to make sure they are in good condition. Any potential problems can be fixed before they get worse.

14. How much does Inlay or Onlay cost?

The cost of inlay or inlay depends on the type of material used and where you live. As inlays and inlays treat caries and trauma-related dental diseases, insurance companies will pay for part of the procedure. Inlays and inlays are generally considered “major” dental procedures, which means insurance can cover up to 50% of the cost. In this case, you’ll only have to pay a few hundred dollars out of your own pocket.

The following prices also reflect the cost of uninsured inlays/inlays:

Mosaic – 650-1200 yuan per piece

Onlay – $650-$1200 (per tooth)

15. What are other problems with dental inlays and onlays?
1) Factors affecting the lifespan of inlays and onlays

There are several different factors that can affect the longevity of your dental restoration. The lifespan of a mosaic or inlay is affected by:

  • the position of the teeth
  • type of material used
  • Condition of the nerves inside the tooth
  • The patient’s oral hygiene level
  • Apply force to your teeth every day

2) Are dental inlays and dental fillings the same?

Dentists can treat caries with fillings or inlays. Early detection of tooth decay, and proper treatment, is an important part of oral health care. Treating cavities early can prevent serious dental problems. So what’s the difference between fillings and inlays? Is one treatment better than the other? Here’s what you need to know.

Traditional fillings and inlays are both used to treat caries, but they are often made of different materials, use different dental procedures, and may be used in different situations.

Fillers are usually made of silver or tooth-colored composite resin. Composite resins are strong, adhere well to tooth surfaces, and have the advantage of looking like other teeth. Inlays can also be made of composite materials, but are usually made of ceramic or gold.

  • How the program is different

The steps for each method are different. It can be prepared and filled in one appointment. As for inlays, the dentist will prep the teeth, remove the imprints, and send them for testing. The lab then fabricated a complete part that fits perfectly into the cavity. Once the block is returned, the dentist will fix it at the next appointment.

Some dentists now offer technology in their clinics that can create inlays while patients wait. Using 3D printing technology, dentists can scan prepared teeth and send the information to the machine. This eliminates the need for temporary inlays. The most common method still involves sending impressions to a lab for fabrication.

  • · When the dentist uses each

Both fillings and inlays can treat caries, but they are not used interchangeably. Dental inlays are more suitable for important caries, especially the most chewed back teeth. For inlays, most of the structure of the tooth still needs to remain intact, but for caries that are only on the chewing surface, such as the center of a molar, inlays may be a better option than traditional fillings. They’re usually more durable, so they’re better for chewing. Inlays also have a lower failure rate than fillers over time.

For small caries, traditional fillings are the best option. The process is quick and efficient and can be done in one visit while preserving as many teeth as possible.

Dentists use fillings and inlays on a regular basis based on each patient’s condition. Dental inlays are a further development of traditional fillings and are suitable for larger caries. Overlays or crowns may be appropriate procedures if more teeth are damaged. A dentist can advise patients on the most effective treatment. Regular visits to the dental office can help you avoid a lot of dental work and keep your mouth healthy.

3) When you need more than filling?

Early-discovered cavities can often be drilled and filled with composite or amalgam materials. In some cases, caries are so extensive that we need to extract more teeth than normal fillings. You may also have cavities on the tips of your teeth. This is often difficult to fix with simple fillers. Inlays, onlays, and crowns provide additional support for those teeth that are superficially dislodged.

4) What does each step bring?

Every restoration requires us to adjust to the shape of the tooth. Therefore, making a mosaic, inlay or crown placement requires multiple inspections. At the first visit, we perform caries removal or root canal treatment. We then make a mold of your tooth and send it to a dental lab for restoration. Temporary crowns or inlays can be fitted to your teeth while you wait.

Once we get your restoration back, we will remove the temporary filling or crown and put your restoration back. Whether you have dentures or crowns, you need to trust your dentist’s advice. You can ask us any questions about treatment. That way, we can explain why one restoration is better than the other, so you can make informed decisions about your oral health.

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