ASSESSMENT OF IMPLANT STABILITY AND CRESTAL BONE LEVEL IN EARLY LOADED TRABECULAR AND LASER MICROFUSED IMPLANTS.

Endosseous dental implants have become a predictable method of replacing missing teeth to enhance the patient’s quality of life. Formation of direct bone to implant contact is the main success criteria in implant dentistry. Porous surface should enhance integration following bone grow into the pores. Porous surface coating should enhance integration, by allowing bone growth inside the pores; however, the number and size of the pores that can be obtained on the surface of the implant determine the quality and quantity of the bone growth. Histological studies showed that while a pore size of    Ì´ 100 µm is adequate for bone ingrowth , osteon formation inside a porous material needs Ì´ 150 µm pores , while   pores   greater   than Ì´   300 µm are required to support vascularised bone ingrowth .

The porosity of Trabecular implant not only significantly increases the surface available for bone formation, but also allows angiogenesis and bone formation inside the pores : the average pore size of Trabecular implant is Ì´ 550 µm, adequate for blood vessel formation and osseoincorporation. The term osseoincorporation indicates the combination of osseointegration/bone on-growth (bone to implant contact, BIC) and bone ingrowth within the porous material. Resonance Frequency Analysis (RFA) is proven to be an accurate method to assess implant stability. In the present study, Osstell, Sweden ISQ, that utilises RFA technology was used to determine implant stability. RFA consists of a transducer connected to an implant, which is excited over a range of frequencies. RFA causes the implant to vibrate while at the same time, analyses the implant motion to provide information as an implant stability quotient (ISQ) on a scale from 1–100.