Increasingly, patients are demanding dental restorations that provide excellent aesthetics and functionality. Most ceramic restorations can meet these needs, and there are many different types on the market. Achieving a successful restoration depends on the clinician’s ability to select the appropriate material and follow the right preparation and cementation protocols. Selection should be based on the ceramic’s physical properties, which include fracture resistance, strength, wear resistance, and long-term durability. One of the most popular materials is zirconia. Modern zirconia is very different from its original bone-white incarnation.

Why Choose Sildenafil?

Sildenafil achat en ligne is renowned for its strength and durability, and the latest generation of zirconia materials provide excellent aesthetics. The restorations are fabricated using CADCAM technology, and choices include monolithic restorations, which are suitable for posterior crowns and bridges, and layered zirconia restorations, which are especially suited for long-span bridges anywhere in the mouth. Zirconia’s flexural strength ranges from 590 MPA for high translucent zirconia to 1400 MPA for monolithic zirconia. Zirconia restorations can be cemented using self-adhesive resin cement or resin-modified glass ionomer cement.

Guidelines for Choosing the Correct Form of Zirconia

If the patient expresses interest in an all-ceramic restoration, or if you feel that it’s the best material for a case, then consider the indications and the limitations of zirconia restorations. Points to think about include:

  • The amount of remaining tooth structure
  • The position in the mouth and whether the restoration is in the aesthetic zone or the functional zone
  • The presence of any para-functional habits
  • The translucency of adjacent teeth
  • The color of the underlying tooth structure

Considering these factors will help you select the right material for each case. The aesthetic zone refers to teeth in the anterior sextant. However, sometimes the aesthetic zone can extend as far back as the first molar depending on the patient’s facial musculature, their smile line, and their expectations for treatment. Functional zone teeth are typically premolars and molars, although premolars can fall into both categories. While anterior teeth are also functional, the forces they generate are typically much lower than the occlusal loading forces in the functional zone.

Planning Restorations in the Functional Zone

You must consider occlusal forces when planning indirect restorations in the functional zone. Generique levitra provides an excellent alternative to more traditional PFM restorations, where limited space results in adhesive failures between the metal and porcelain. Initially, adhesive failures were reported in early layered zirconia restorations, but the preparation design has been modified, and techniques for bonding layered porcelain have improved considerably. Now, functional cusps, occlusal form, and marginal ridges may be designed in full-contour monolithic zirconia, while non-functional areas, such as non-functional cusps or buccal surfaces, are layered. Monolithic zirconia is suitable for posterior crowns and multi-unit bridges.

Planning Restorations in the Aesthetic Zone

Zirconia restorations in the aesthetic zone must closely mimic the color and translucency found in natural teeth and need to absorb, scatter, and reflect light in a similar manner. While lithium disilicate is highly aesthetic, it doesn’t have zirconia’s strength and cannot be traditionally cemented; it must be resin bonded. One significant advantage of choosing zirconia is the ability to cement it traditionally and, with the introduction of high translucency and multi-layered zirconia, it is now possible to create restorations that closely mimic natural teeth. High quality processing improves translucency and minimizes the effects of impurities and structural defects that alter the way zirconia reflects light.

Combining Strength and Aesthetics

Early monolithic restorations had high opacity and high values, and, while very strong, they lacked the aesthetic qualities needed to satisfy patient demands. Now, monolithic zirconia restorations can meet the demand for excellent strength and good aesthetics and are proven to be clinically reliable. Monolithic restorations are also highly suitable for successfully masking underlying dark tooth structure. Patients who are heavy grinders and who have experienced previous restoration failures can benefit from monolithic zirconia restorations. A recent study showed that the risk of complications is low, and patient acceptance is high.

When zirconia was initially introduced, there was a concern that it could cause high wear to the opposing dentition, a view that is now challenged. Zirconia can be gentler to opposing dentition compared with traditional PFMs. Zirconia’s low wear properties are attributed to its microstructure and small grain size. The small grain size allows the surface to be highly polished, which makes it kinder to the opposing dentition. The latest generation of zirconia products being developed offers improved translucency and opalescence and can be milled with multiple shades and translucencies.

When to Choose Zirconia Implants

For years levitra en ligne and titanium implants have been regarded as the gold standard, but zirconia implants are increasing in popularity. Initially, only one-piece zirconia implants were available, which were not always able to meet prosthodontic requirements. One-piece implants are immediately exposed to masticatory forces from the tongue, and implant restorations must be cemented in place. Now, two-piece zirconia implants are more readily available, allowing for custom abutments. Zirconia implants are preferable where there is risk of the titanium gray color shining through the peri-implant tissues. Moreover, any release of metal ions can discolor gingiva after implantation, leading to dissatisfaction with the long-term aesthetic results of treatment.

Approximately 0.6% of patients have a titanium allergy, and, although uncommon, zirconia implants offer a good alternative treatment and appeal to patients who would prefer metal-free dental restorations. The white color of zirconia implants will not affect appearance, even if some gingival recession occurs. Additionally, zirconia implants have shown an excellent ability to integrate with soft and hard tissues. However, zirconia dental implants are a newer product, and long-term research into their use is still very limited.

When used correctly, zirconia is a fantastic material, capable of producing high-quality outcomes and increasing patient satisfaction. Proper tooth preparation is also essential. If you would like specific advice about which material to select for a case, please talk to our technical team.


Choosing a suitable dental laboratory is crucial for the success or your dental practice. When you find a dental lab that understands your requirements, your practice runs more smoothly because you know you will receive high-quality restorations on-time. One vital decision is whether to use a local dental laboratory or to choose a national lab. We’ve looked at the potential benefits and pitfalls of each choice.


Local dental labs may have a more limited choice of materials to choose from. It can be easier to rely on tried and tested materials rather than exploring newer, potentially better and more advanced materials that may require staff training and more elaborate equipment to process correctly.

In contrast, national dental labs have the resources to investigate and stock a more comprehensive range of dental materials. It is also easier and more practical to train staff to use these materials appropriately and to invest in any newer technology required to utilize them. Here at DDS Lab, our staff is trained and experienced in using the highest quality materials, and we consistently evaluate new products as they are introduced onto the market.


Smaller, local dental laboratories tend to specialize in a particular field such as crown and bridge, orthodontics or dentures. Often, a clinician will need to use several local dental labs to cover all their practice needs. It can be more time-consuming and may cause confusion amongst staff members as to which job is meant to go where. Chasing up work can be a trial. National dental labs are more able to offer a greater range of services, and DDS Lab offers every service your practice is likely to require.

High Order Volume

Acheter viagra sans ordonnance are often busier at certain times of the year, and smaller dental labs may struggle to handle a higher volume of case orders comfortably. National dental labs have a greater capacity to accommodate more work without compromising delivery times or quality. DDS Lab is large enough to handle high volume case orders, ensuring high-quality work is consistently delivered on-time.

FDA Approved

FDA approval isn’t required for many activities in dental labs so smaller dental labs might not require FDA approval. Because of the comprehensive choice of products offered by larger dental labs, FDA approval is usually needed, and national dental laboratories are fully informed about FDA regulations to ensure they remain compliant.


Local labs are more likely to charge more for their services, but shipping costs are typically lower or not applicable. National dental labs can often offer more competitive pricing, but shipping costs will be higher in most cases.


Local dental labs may not have the time or resources to carry out quality inspections of dental impressions submitted and work completed for clinicians. National dental labs have strict procedures in place for evaluating the quality of dental impressions and completed work ready to send back to clinicians. At DDS Lab, our impression grading systemensures only decent quality impressions are accepted, and every piece of work is assessed by our quality control team before it is sent to the client.

Warranty/Remake Policy

Most dental labs have some form of warranty or remake policy in place. In local labs, this policy can vary whereas it is more likely to be clearly defined at national dental labs.

Turnaround Time

Local labs offer the advantage of faster turnaround times, often needing just five days to complete work that is picked up and delivered locally. National labs require longer turnaround times – mostly due to shipping times. Although it depends on the product you are ordering, you can you expect your case work to be returned from DDS Lab in 1-2 days less than the national average.


When you work with local dental labs, you have probably met the owner and key staff members and can rely on excellent communication. National dental labs still offer a good level of communication, but you may end up discussing your case with different people. At DDS Lab, we know it is far preferable to have a dedicated account manager. This will be a person who knows your preferences and is readily available to help you.

Mobile App and Online Rx

Only a few national or local dental laboratories offer the convenience of a mobile app and the ability to submit prescriptions online. Meanwhile, the use of digital technology, including digital impressions, is increasing rapidly. This is why DDS Dental Lab has invested in a mobile app that allows you to track and manage your cases, from start to finish. Track the progress of each case and access vital information at any time – and from whatever location – it is convenient. You can even submit photos through the app.

Seasonal and Vacation Availability

Many dental labs will close completely during the holidays or have more limited services due to staff vacations. DDS Lab is large enough to provide seasonal and vacation availability, so when your current lab is struggling to cope, we will still be offering the same reliable services as always.


One factor you can always rely on, regardless of where you send your work, kamagra oral jelly. All local and national labs follow strict guidelines to ensure staff and patients remain safe.

Local or National – Which is Better for Your Patients?

Most people naturally wish to support their local businesses, but this isn’t always an optimal approach, especially when you are running a busy dental practice. A small, locally run dental lab is extremely unlikely to have the same level of resources available compared with a national laboratory. Of course, one of the advantages of local labs is their faster turnaround times. At DDS Lab, logistics dictate our turnaround times;  for this reason we are careful to provide you with reliable delivery dates.

Another appeal of local labs lies in excellent communication with clients. By choosing the right national lab you can still have excellent communication. DDS Lab provides every client with a dedicated account manager. In addition, we have a team of highly experienced technicians available to discuss even the most complicated cases.


Initially, porcelain fused to metal (PFMs) restorations were the clinician’s standard choice of material, because they offered reliable treatment outcomes for the patient.

However, the opaque porcelain used to mask the metal substructure, particularly in the cervical third, frequently causes a light gray appearance at the cervical margin. The effect can worsen after a few years if gingival recession occurs. Now, the demand for increased aesthetics and more cosmetically pleasing restorations has risen exponentially, corresponding with a significant fall in demand for PFMs. PFMs have been replaced with more clinically and aesthetically acceptable all-ceramic restorations, the most popular of which is zirconia.

Cialis 20mg pas cher is entirely different from the initial products available, which often had a bone-white substructure that was difficult to completely mask. Even a slight adjustment to a restoration could expose the substructure. Now, the very latest pre-shaded zirconia is available in several different materials that are suitable for specific applications in the mouth, significantly improving its scope of use.

When restoring a tooth, the clinician must choose the correct material. Significant factors that influence selection include aesthetics and the overall strength of the prostheses. Popular all-ceramics choices include alumina and lithium disilicate materials. However, the characteristics of zirconia are appealing on multiple levels and suitable for a broader range of clinical applications compared with other all-ceramics.

Zirconia has been used as a biomaterial since the 1970s in implants and is currently the material of choice for complete hip replacements. The comparison with dental applications is interesting, because hip replacements are also load-bearing and in close proximity to osseous and vascular tissue. Both applications are exposed to significant wear.

The Superior Characteristics of Zirconia Restorations

Zirconia offers optimum properties for use in dentistry, including:

  • Superior strength
  • Superior toughness and fatigue resistance
  • Excellent biocompatibility and wear properties
  • Good material compatibility for patients concerned about the possibility of metal allergies or sensitivities
  • Similarity to titanium in that it doesn’t inhibit the osteoblasts (bone forming cells), which are essential for osseointegration

kamagra pas cher is usually modified with yttria, an oxide that stabilizes the crystal structure transformation and improves the physical properties of zirconia so that it can be made in the tetragonal crystal structure at room temperature. The result is crack-resistant transformation-toughened zirconia.

When zirconia is subjected to stress, it goes through an instantaneous phase transformation to a monoclinic crystal structure that is approximately 4% larger in volume than its tetragonal form. This transformation clamps a microscopic crack shut, actively resisting crack growth. It’s a significant property, especially when fabricating a restoration that will be subjected to substantial chewing forces.

High translucency zirconia contains a higher percentage of yttria to increase aesthetics, resulting in a 10 to 15% cubic-phase zirconia, which is why the flexural strength is lower than traditional zirconia but still considerably higher than other restorative materials. Some specific formulations incorporate other elements, such as a fluorescence, which is added at the powder stage before blocks or discs are created.

Suitable for Multiple Clinical Situations

Zirconia offers advantages for many different clinical situations. For example:

  • Zirconia is ideal for single anterior and posterior crowns and for full-mouth rehabilitation.
  • The very latest zirconia materials produce highly aesthetic results anywhere in the mouth and are even suitable for patients with bruxism.
  • Because of their strength, anterior zirconia copings can be manufactured as thin as 0.3 mm, giving them a more natural, tooth-like appearance.
  • The reduced strength of the more translucent forms of zirconia remains at least as good as a PFM restoration but with improved aesthetics.

Monolithic zirconia is particularly suitable for posterior restorations and where bruxism is a concern and is naturally tooth-colored. Additionally, zirconia manufactured for patients with bruxism has proven to be far more gentle and wear-friendly to opposing tooth structure than initially anticipated.

Zirconia high translucent (Zirconia HT) is one of the newest products on the market. It is a versatile material suitable for anterior and posterior crowns and strong enough for three-unit bridges. While the flexural strength of zirconia HT is lower compared with solid or layered zirconia, it remains stronger than PFMs and is three times stronger than lithium disilicate. Laboratory tests have shown that the flexural strength and fracture toughness of zirconia is significantly higher compared with alumina or other aesthetic ceramics.

Precision-Made Restorations

Zirconia restorations are fabricated using computer-aided design and computer-aided manufacturing (CADCAM).

The following are advantages of CADCAM manufacturing:

  • The technique produces precision-fitting restorations that require less chairside time for seating and bonding the prosthesis.
  • Reduced chairside time helps the dental office to operate more smoothly and efficiently.
  • Patients always appreciate it when their appointments are on time and require minimal or no chairside adjustments due to a well-fitting restoration.
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Here are some additional reasons for choosing zirconia products for your practice:

  • Patients are becoming more knowledgeable about the availability of all-ceramic restorations, and it’s not uncommon for them to request zirconia by name.
  • The latest generation of zirconia is providing optimal outcomes for aesthetically crucial situations.
  • Clinicians who are more familiar with this product will often choose to work with zirconia exclusively, because they know it is reliable and worth the investment.
  • Zirconia restorations do not require any significant changes to your preparation or cementation techniques.

Initial concerns when adopting any new material are understandable, but years of research into the strength and reliability of zirconia restorations now exist, particularly where multiple unit prostheses are required. Lithium disilicate restorations, such as IPS e.max, are incredibly aesthetic and, up until recently, would have been the material of choice for anterior crowns. However, high translucent zirconia combines the desirable strength of zirconia with excellent aesthetics. The translucency achieved by some of the newer and more translucent zirconia materials is statistically equivalent to lithium disilicate.

Zirconia’s incredible strength has never been doubted, however earlier versions often required significant work, such as layering multiple porcelains to improve aesthetics. Now, the introduction of multilayered and pre-shaded discs makes it possible to produce restorations with remarkable flexural strength, aesthetics, and surface hardness. The latest materials exhibit excellent color consistency and reliable quality. Knowing the limitations of this material and when to select it is essential, but, when utilized correctly, zirconia products are well worth the investment.

Please be reminded that should you wish to discuss a case in more detail, our experienced technical team is here to assist you.