Screw fixation of the crown onto the implant (transocclusal fixation)

Forms of dental implants

In modern dentistry, several forms of dental implants are used for dental implantation:

• Plate implants , if the patient has a narrow bone and it is impossible to install root-shaped implants with a hole in the center and supports on which the crowns are fixed. Plate-shaped structures are a long, narrow metal strip that is placed at the desired length into the jaw bone in order to give it stability. A plate implant is installed on the front teeth, where there is no heavy load or if the patient is intolerant of removable dentures;
• Cylindrical implants are used when a tooth was removed 2-3 weeks ago and the bone tissue does not have atrophy or inflammation. Cylindrical profile implants have a collapsible core and a porous structure, due to which they are securely and firmly fixed in the bone. Designed for both immediate and delayed implantation;
• Basal implants are T-shaped and are installed deep into the bone - the dense basal layer. Basal structures are used if the alveolar processes of the jaw are severely atrophied and bone grafting cannot be performed. In this case, the basal implant abutment becomes integral with the intraosseous part;
• Screw implants are the most physiological and durable root-shaped dental implants, which are used in 95% of cases.

Before installing artificial roots, a diagnosis is carried out - an assessment of the condition of the proposed implantation segment (quality, contour, thickness, height) of the bone tissue. If its volume is insufficient, reconstructive plastic surgery is performed.

- bone augmentation surgery.

At Dr. Razumenko’s clinic, the latest generation Japanese “Vario Surg” device is used for osteotomy. Piezosurgical technology allows precise and atraumatic dissection of the alveolar ridge, tissue sampling, and sinus augmentation without the risk of perforating the Schneiderian membrane and the mucous membrane of the maxillary sinus.

The ultrasonic tip makes the thinnest cut, wound healing occurs quickly and without complications, without causing discomfort and pain to patients

.

Impression of teeth using a 3shape computer scanner

If the patient wants to undergo the procedure of installing dentures at the highest level, with the possibility of achieving maximum aesthetic effect and impeccable functional parameters, then experts recommend opting for zirconium crowns or e.max glass ceramics. This involves the use of innovative digital technology 3shape, which ensures extreme precision both in the modeling of ceramic dentures and in the process of taking dental impressions.

The key advantage of using the above equipment is the absence of the need for physical taking of impressions, and, accordingly, the elimination of discomfort for patients associated with this process.

In addition, through the use of the improved “3SHAPE” program, based on the use of computer technology, specialists have the chance to study in detail the structural features of the jaws, examine the surface of the teeth, and also determine the bite as accurately as possible. Subsequently, the digital scan is transferred to the laboratory online. After the image enters the computer application, modeling of the future prosthesis immediately begins. Next, the production process of the e.max crown or zirconium structure itself begins.

It should be noted that if the computer application detects errors, the 3D image will be sent to the laboratory only after they have been corrected. This guarantees a highly accurate prosthetic result, and the ability to transmit images to dental technicians online can significantly reduce the time needed to create crowns.

Scanner 3shape Trios – 3D scanning of teeth »

Screw crown on implant

Screw implants in Korolev are threaded rods that, simulating a tooth root, are screwed into the jaw bone. The main function of screw implants is to provide a strong support for the installation of a crown.

Screw fixation on implants in Korolev is classic and today is the most common method of implanting structures, since these structures have a wide variety of thread shapes and also, screw implants can be

:

• collapsible and non-collapsible;
• bottom- and two-stage;
• have a smooth or rough surface;
• coated with bioactive materials.

In addition, to improve the strength of connections with the screw method of fixation on implants in Korolev, dentists use special recesses and recesses to prevent the implant from moving or rotating around its axis.

The main mistakes a doctor makes when doing prosthetics

At the very beginning of our article, we said that when prosthetics on implants is important, the high quality of both the surgical stage of treatment and the stage of permanent prosthetics. If, when installing crowns on implants, the doctor makes inaccuracies or mistakes, the patient may not like the result of the implantation and, moreover, serious complications may arise after the restoration.

What mistakes are important to avoid when installing crowns on implants? Let's consider in detail:

• 1. Inaccurate crown manufacturing. If the crown does not have high anatomical accuracy and does not fit well to the neck of the installed implant, the soft gum tissue around the crown will be constantly injured, which is dangerous due to the occurrence and development of inflammatory processes.
• 2. Making a crown without taking into account the length of the implant, the thickness of the bone and gum, and the height of the gum.
• 3. Mismatch between the diameters of the crown and implant. This error can lead to soft tissue inflammation and bone resorption in the implanted area.
• 4. Unstable fixation of the abutment in the body of the implant. If the abutment is poorly fixed in the implant, the risk of inflammation in the area where the titanium rod is installed increases. Naturally, the mobility of the abutment in the implant also causes mobility of the crown.
• 5. Incorrect crown shape is a mistake that can lead to abutment breakage.

Any of these mistakes by the prosthetist can negate the results of the implantologist’s work and cause rejection of the installed implants - a complication that in most cases has to be eliminated by removing structures from the bone and lengthy and expensive treatment. In order not to waste your nerves, money, time and not to risk your health - before prosthetics with crowns on implants, carefully choose dentistry.

A good clinic should use the most modern and accurate diagnostic equipment and technologies that allow planning and predicting the results of implantation and prosthetics. Our premium dentistry in Moscow, Firadent, uses all the innovations that allow dental implantation to be carried out efficiently and safely for patients!

Screw fixation on implants

Thanks to dental implants, people have a unique opportunity to insert teeth without affecting neighboring healthy ones and avoiding bulky and rather uncomfortable dentures.

During implantation, a supragingival titanium rod (implant), an abutment and a screw are introduced into the bone tissue of a missing tooth, which secures the implant and abutment.

Crowns are fixed in 2 ways

, which are determined at the design planning stage:

• Cement fixation on implants
  . In this case, the abutment is inserted into the implant body and screwed. After this, the crown is fixed to the abutment with dental cement, which has shock-absorbing properties. This fixation is simple and aesthetic;
• When screw-retained
  on implants, the abutment is connected to the crown outside the oral cavity and this prefabricated structure is inserted and screwed into the implant. And the hole remaining on the crown is filled with a composite material, without using cement, which is important for chewing teeth. With screw fixation on implants, the prosthesis can be easily replaced if necessary.

Screw fastening of a crown to an implant in Korolev is the most reliable, practical and safe type of fixation for the patient. If the screw becomes loose, you can easily and quickly replace it by unsealing the hole and unscrewing the screw, easily replacing it with a new one.

This type of fixation is recommended if the implant is installed in the smile area or is bridged over several implants.

In Dr. Razumenko’s dentistry in Korolev, only the most modern implantation methods are used to restore and replace lost teeth, due to which artificial teeth are not different in functionality or visually from the rest and have a long service life.

Taking impressions for making a crown

Today, there are two known methods of taking impressions, which are used when it is necessary to make a prosthesis on implants:

• Closed spoon method;
• Open spoon method.

The first method is used exclusively for single structures or when using two dental implants fixed parallel to each other.

A more complex option is the “closed spoon method”, but it has higher accuracy. Can be used when installing several titanium structures or when they are located at an angle relative to each other. The only limitation for this method is the need to fix the crown at the end of the dentition.

As for the production period of the prosthesis, in general it takes about 14-28 days. As a rule, the first two weeks are required to receive the abutments, and the remaining time is occupied by the actual procedure for creating the crown in the laboratory.

Our prices

* The prices indicated on the website are not a public offer. The exact cost of treatment can only be determined at an appointment with a doctor.

Prices for treatment in Korolev full price list

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Article Expert:

Marinova Larisa Nikolaevna

Implantology, surgical dentistry. Dental implantation systems: Astratech, Biohorizons, Bicon, Implasa Hochst, Miss, Straumann. Sinus lifting (open and closed), bone grafting. Periodontology: frenuloplasty and vestibuloplasty, lingual frenuloplasty, recession plastic surgery, flap surgery.

Work experience 25 years

Factors for choosing a fixation method

The choice of the best fixation method for the patient is made by the doctor, based on their clinical picture, the main determining factors are:

• The total cost of treatment, the possible quality of the result and the financial requirements of the patient;
• Occlusal initial parameters;
• Potential risks of complications;
• Aesthetic requirements;
• Availability of access to the intervention area;
• Implant position;
• The need to maintain the structural elements of the prosthesis;
• Safety for the patient.

Based on the explanations of the attending physician, the patient consciously chooses or refuses to use this method.

It is preferable (ideally) to use screw fixation when installing implants in the lateral jaw, when the exit of the screw shaft is located in the center of the chewing surface. In the anterior part of the upper jaw, in cases where the implants have a vestibular inclination, the doctor determines based on the clinical situation which fixation is more convenient to use - cement fixation on individual abutments or using transocclusal screws.

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