A sinus lift often precedes the implant placement in the area of the rear teeth of the upper jaw. When these teeth are extracted for whatever reason, the bone disappears very fast. As a result, the maxillary sinus grows in order to fill the newly opened space. Sometimes the roots of the rear teeth are in the sinus and when they are extracted, it turns out that it is not possible to replace them with implants because there is no bone left there.
In such cases, it is essential that the so called sinus lift be performed before placing the implants.
This is a procedure which first increases the bone material in the area of the maxillary sinuses. The bone graft should be placed in the gap between the natural bone and sinus mucosa. This is achieved by lifting the sinus floor membrane first, and then filling up the space with bone material.
Therapy with platelet-rich plasma (PRP) might speed up the bone and tissue growth as well as wound healing, thus helping to guarantee the long-term results of teeth implants. It boosts the regenerative powers of the body. During the implant placement procedure the application of PRP might give a flying start to bone growth and thus provide stability of the implant in two-three weeks which shortens the time between implant placement and placement of the permanent crown.
Before this procedure a certain amount of the patient’s blood is taken in a sterile test-tube. The blood is then centrifuged at certain parameters for 5-8 minutes. When the centrifugation is over, the plasm is divided in 3 layers:
- Platelet-poor plasma
- Red blood cells (erythrocytes)
- The so called PRP – a fraction rich in thrombocytes and white blood cells (leukocytes)
The procedure uses the last fraction whose concentration of thrombocytes is 8 times higher than the blood average. Furthermore, it contains leukocytes and a great number of growth factors. Growth factors found in the thrombocytes are responsible for:
- Tissue regeneration and rejuvenation
- Increase of collagen production
- Stimulation of migration, division and differentiation of cells and their production of a number of substances and enzymes
- Affecting mainly the mesenchymal stem cells for their differentiation into fiber types producing collagen and elastin
- Growth factor separated from the leykocytes (VEGF) stimulating the formation of new blood vessels (angiogenesis), thus improving microcirculation
PRP is used in dentistry when bone material is missing. PRP helps cell division, and hence the formation of new bone material. When osteoplasty is necessary, animal or human PRP facilitates the ossification of the engrafted bone and its acceptance by the body. To reinforce this acceptance, PRP should be added before placing the new bone.
Is There an Age Limit for Implants?
Contrary to popular belief, age itself is not an obstacle for dental implants placement. There is a conditional age limit – the earliest age for implant treatment is 18 – 20 years (i.e patients whose teeth are still growing and developing). Your health condition is a more important criterion, and your dentist will decide if you are a suitable candidate for this type of treatment.