In conventional dentures that are cemented and directly adhered to the mouth, cement (adhesive) residues may escape into the gingiva and go towards the implant surface, even with careful gluing. Since the prosthesis cannot be removed, these cement residues can damage the gingiva, bone, and implant, and are the most important cause of long-term failure in implant treatments.
In screwed prostheses, there is no bonding process necessary, or it is done outside the patient's mouth. The biggest advantage of this approach is that it can be easily removed by accessing the screws from the screw holes on the crowns. In contrast, with the cemented approach, the cement has to be tried to be cracked and removed with impacts that may disturb the patient. Sometimes, it may not even be possible to remove the cement, and the prosthesis may need to be cut out and made again from scratch. Impacts to displace cemented prostheses can cause screw and neck fractures in implants or extra breaks in the prosthesis.
Porcelain flakes, fractures, etc. that may occur in the prosthesis can be repaired easily by removing the prosthesis from its place. It also allows small additions to be made under the body, which occurs due to gingival recessions in the mouth over time. On the contrary, in cases where there is too much pressure on the gingiva, the problem can be solved by removing tiny pieces from the body. In cases where implants are placed adjacent to natural teeth, contact problems between the natural tooth and the implant can occur at a rate of 50 percent in an average of three years, and food can enter between the natural tooth and the implant crown. In screwed prostheses, the contact problem can be easily solved by removing the prosthesis from its place.
Sometimes, loosenings may occur in the abutments-screws that connect with the implant. While it is not possible to tighten the screw without removing the prosthesis in cemented prostheses, the problem can be solved very easily in screwed prostheses. It is also possible to clean the prosthesis and the mouth by removing the prosthesis at certain intervals.
Patient comfort is provided with fewer implants thanks to screw systems, in which only four implants are placed (also called the All-on-four approach). In these systems, the prosthesis is completed by placing implants in the area of healthy bone and making crown extensions called "wings" behind. The surgeon may avoid performing advanced surgeries like sinus lifting, bone grafting, etc.
Sometimes these advanced surgical procedures may prevent immediate implant placement after the bone or sinus operation. In these cases, the process is prolonged, and an extra six to eight months can be expected in the whole treatment plan. However, in the All-on-four system, the process is shortened because the implant is placed almost where the healthy bone is. Reduction in advanced surgical steps and reduction in the number of implants also provide an advantage in terms of the total cost of the treatment.
At Citydent Istanbul, we provide all kinds of screw-retained treatment solutions, including metal-based screw-retained ceramic crowns, zirconia-based screw-retained ceramic crowns, and monolithic zirconia screw-retained crowns.
Screw-retained crowns have several advantages over other types of dental restorations. Some of these advantages include:
Improved stability: The use of a screw to secure the crown to the implant or abutment post provides an extra layer of stability, reducing the risk of the crown becoming loose or dislodged.
Easy removal and replacement: Because the crown is attached with a screw, it can be easily removed and replaced if necessary, without the need to replace the entire restoration.
Reduced risk of chipping or breaking: Screw-retained crowns are often made from strong, durable materials such as zirconia, reducing the risk of chipping or breaking that can sometimes occur with other types of restorations.
Aesthetically pleasing: Screw-retained crowns can be made from materials that have a natural-looking appearance, such as ceramic or zirconia, providing a more aesthetically pleasing result.
Reduced risk of bacterial growth: The design of screw-retained crowns can help to reduce the risk of bacterial growth around the restoration, as there are no cement or adhesive materials used in the placement process.
Overall, screw-retained crowns can provide a long-lasting and effective solution for individuals who are missing one or more teeth or who require a dental restoration. It is important to consult with a dental professional to determine if this type of restoration is the best option for your specific dental needs.
Screw-retained ceramic crowns are a type of dental restoration that is used to replace a missing or damaged tooth. This type of crown is made of ceramic material that is strong, durable, and has a natural-looking appearance.
The crown is secured in place with a small screw that is placed into the implant or abutment post. This screw is then covered by a small filling material, making it invisible to the naked eye.
One of the main benefits of using a screw-retained ceramic crown is that it allows for easy removal and replacement of the restoration if necessary. Additionally, the screw-retained design can help to minimize the risk of loosening or dislodging of the crown, as the screw provides an extra layer of stability.
Overall, screw-retained ceramic crowns can provide a long-lasting and aesthetically pleasing solution for individuals who are missing one or more teeth. It is important to consult with a dental professional to determine if this type of restoration is the best option for your specific dental needs.
Screw-retained monolithic zirconia crowns are a type of dental restoration that is made from a single block of zirconia material, a type of ceramic that is known for its strength and durability. Monolithic means that the crown is made of a single solid piece of material, rather than having multiple layers.
In this type of crown, a small screw is used to attach the restoration to the implant or abutment post, similar to screw-retained ceramic crowns. However, because zirconia is a much stronger material than traditional ceramic, screw-retained monolithic zirconia crowns are often preferred for their ability to withstand heavy biting forces and resist chipping or cracking.
Additionally, because the crown is made of a single piece of material, there is no risk of the ceramic veneer layer chipping or breaking away, which can sometimes happen with traditional porcelain-fused-to-metal (PFM) crowns.
Screw-retained monolithic zirconia crowns are often used for posterior teeth (molars and premolars) where strength and durability are especially important due to the heavy chewing forces in that area.
As with all dental restorations, it is important to consult with a dental professional to determine if screw-retained monolithic zirconia crowns are the best option for your specific dental needs.
Screw-retained crowns are placed using a two-stage process. First, the implant or abutment post is surgically placed in the jawbone. Then, after a period of healing, the crown is attached to the implant or abutment post with a small screw.
The lifespan of a screw-retained crown will depend on various factors, such as the patient's oral health, implant location, and materials used. With proper care and maintenance, screw-retained crowns can last for many years.
Laboratory costs: The laboratory costs for screw-retained crowns may be higher due to the precision required in the impression and laboratory process, as well as the need for specialized equipment.
Time: The placement process for screw-retained crowns may take longer than cemented crowns, as there are additional steps involved, such as the placement of the abutment post and screw.
Retrieval: The ability to easily remove and replace screw-retained crowns may add to the cost, as it requires specialized tools and equipment.
Complexity: In some cases, screw-retained crowns may be more complex than cemented crowns, requiring additional customization or adjustment to fit properly.
Yes, screw-retained crowns can be easily removed and replaced if they become damaged or worn over time. This is one of the advantages of screw-retained crowns compared to cemented crowns.
Screw-retained crowns can typically be repaired if they become damaged or worn over time. The repair process will depend on the extent and nature of the damage, but it may involve removing the crown, repairing or replacing the damaged component, and then reattaching the crown using the screws.
One advantage of screw-retained crowns is that they can be easily removed and replaced, which can make repairs or replacements easier and less invasive than with cemented crowns. It is important to address any issues with your screw-retained crown as soon as possible to prevent further damage or complications. Your dental professional can provide specific recommendations for repair or replacement based on your individual situation.
These may include implant or crown fracture, screw loosening or breakage, and potential damage to the surrounding teeth or tissue during the placement process.
Precision is required in the impression and laboratory process with screw-retained crowns.
The pieces used in the prosthesis phase may be a little more costly.
However, screw-retained crowns are not applicable in all situations. For example, in cases where the screw holes will protrude from the outer surface of the front teeth, it cannot be done because aesthetic problems will occur.