What are the reasons for dental implant screw loosening?
After the incompatibility of the implant with the root of the tooth, loosening of the implant screw is known to be the main cause of failure of the implant or fracture of the artificial tooth prosthesis.. For this reason, the importance of choosing prosthetic parts, implant screws and abutment is very important in maintaining the implant and increasing its success rate.. Today's article on Dr. Hossein Borjian's website The best implant specialist in Isfahan which is compiled for you dear readers. It will investigate and study the reasons for loosening of dental implant screws.
Maybe in the past Opening of the implant screw It used to be a common occurrence, but now with the advancement in implant manufacturing technology, we see less implant screw loosening. Factors that used to cause implants to loosen:
Implant placement with external connection:
The old implants were designed in such a way that the external connections of the implant usually had very little resistance, and putting a small amount of pressure on the external connection caused the screw to open.. Of course, nowadays, most of the implants have an internal connection, so that the pressure on the connection does not cause the implant screw to open.. In fact, the design of these connections is such that no more pressure is applied to the screw and all the pressure is on the internal connection.
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Low torque for screwing the abutment:
This depends to some extent on the design of the abutment, the materials used and the design of the screw head. In the past, the loosening of the implant or abutment screw, especially for the slotted type implant screw, was related to the use of an inappropriate torque system in its tightening.. But today, their design is much better than in the past, and improper torque system cannot be the reason for today's implants to loosen..
Failure to manage teeth grinding or tooth wear:
The problem of grinding teeth has always been a concern for the loosening of implant screws, and there are still many debates about it, and various studies deal with the effect of grinding teeth on implant failure.. But the problem of implant screw opening due to tooth wear applies to implants that have an external connection. In today's advanced designs, the components of the internal connection are locked together so well that tooth wear no longer causes the implant screw to loosen.. Of course, if the grinding tooth puts a lot of pressure on the base of the implant; There is a possibility of breaking it.
If you recently had an implant surgery and faced the problem of the implant screw loosening, you must have come up with this question, why do we still face the problem of implant screw loosening despite the progress in the design and manufacturing of dental implant parts and components?
There is no detailed information about the reason for the loosening of the screws of the advanced implants. But biomechanical evaluations and tests indicate that various factors can interfere with the implant's performance system. Although the disturbances in these functions are not visible with the normal eye; But if the components of the dental implant do not fit together well, they may cause problems due to the lack of compatibility in terms of design and coordination with each other.. The following are the most important reasons for implant screw loosening:
Bone profile around the implant
One of the most common causes of implant screw loosening is the bone profile around the implant, which prevents the screw from being fully seated.. Unlike the external connectors that were modeled on the first models and had wide heads, the internal connectors with today's design are funnel-shaped.. In funnel-shaped profiles, the bone prevents the abutment from falling and allows the screw to be fully seated in its implant location.. But on the other hand, when the bone is under pressure from the side of the screw, it causes its tissue to loosen and as a result, the screw loosens or falls..
Loosening of the healing cap
If the healing cap loosens, it is better to check the fillers and the bone profile around the implant by the surgeon. If the screw of the temporary abutment or the healing cap loosens, you should discuss it with your technician so that he can take it into account in the construction of the permanent part and prevent it from happening again after installing the permanent abutment.. Usually, by sending a photo along with the current status report, which is obtained from the bone profile examination results, the surgeon helps the technician to design the artificial tooth prosthesis together with the abutment in such a way that the implant screw does not loosen..
Improper implant screw selection
Various titanium, ceramic and impression cupping screws and abutment samples have been produced for each implant.. It may be a little difficult to find the most correct and suitable one for long-term operation. The surgeon should be careful in choosing them, because some implant screws may look suitable, but it is possible. In terms of design, they may not be compatible with some implant components and cause complications. Complications caused by choosing the wrong implant screw may cause the implant screw to loosen and its performance to fail.
Improper implant screw size
Screw tightening occurs when the temporary or permanent screw is firmly in place. The screw may seem tight. But if the abutment is longer than the implant and enters the jaw bone. After some time, the jaw bone growth causes the implant screw to loosen. To prevent the abutment screw from opening with bone growth, the surgeon must check the bone profile around the implant and, if necessary, shorten the abutment screw to be higher than the implant base..
Unexpected loosening of the abutment screw
There are cases when the screw is loosened too soon and the patient has to go to the dentist regularly outside of the specified schedule for a checkup to tighten the implant screw.. The occurrence of such unexpected problems is unpleasant for the patient, and from a clinical point of view, spending time to repair these cases will be a waste of time.. Therefore, it is better to carefully select the components and parts of the implant, as well as how to connect the abutment to the base of the implant and mount the artificial tooth prosthesis, to prevent the problem of opening the implant screw in order to save the time of the patient and the dentist..
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The reason for the early opening of the prosthesis screw of the implant prosthesis
The prosthesis screw of the implant denture often loosens due to the gap between the bone profile around the implant or loosening of the abutment.. This problem may even happen again after replacing the abutment and tightening the screw. In this case, it is likely that the problem is with the artificial tooth prosthesis, which must be redesigned so that the way it is placed on the abutment and the implant base does not cause the implant screw to loosen..
Complications of implant screw loosening
If the opening of the implant screw causes the patient to feel. Artificial tooth prosthesis It may be loose or moved. Difficulty eating and chewing food. Feeling pain while chewing food can also be one of the side effects of implant screw opening. If the opening of the implant screw is not detected quickly. Putting more pressure on the implant increases the possibility of breaking the prosthesis or damaging the implant base.. If the implant base cracks or breaks, it must be removed from the jaw bone during a surgical operation and replaced with another implant base..
tip :
- The scientific accuracy of the above published material should be confirmed by the patient's personal consultation with Dr. Borjian.
- This article is managed and published by the site admin.
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