Patent ID: 7241144

Claim:
A method of expansion of bone tissue for receiving a dental implant comprising the steps of: (a) creating an initial osseotomy site in the maxilla or the mandable to a desired depth by drilling using a pilot drill at a predetermined implant location; said initial osseotomy site having a first diameter substantially smaller than an outer diameter of said dental implant; (b) providing multiple threaded expanders of substantially same structure with increasing diameters, each of said threaded expanders comprising: a top enabling engagement with a dental ratchet; a cylindrical shaft having a upper and a lower end, having depth markings along a longitudinal axis of said shaft; and a threaded expansion tip connected to said lower end of said cylindrical shaft; said threaded expansion tip of each of said multiple threaded expanders having a same length and a substantially same threaded structure to a threaded structure of said dental implant, yet a narrower outer diameter than said outer diameter of said dental implant; (c) screwing said threaded expansion tip of a first threaded expander into said initial osseotomy site, thereby expanding said initial osseotomy site laterally by pushing bone tissue away radially from a longitudinal axis of said initial osseotomy site, to obtain an once expanded osseotomy site that has a second diameter larger than said first diameter of said initial osseotomy site; (d) allowing said threaded expansion tip of said first expander staying in said once expanded osseotomy site for a sufficient amount of time to impress an interior wall of said once expanded osseotomy site to form grooves and threads; (e) retrieving said first expander by screwing said threaded expansion tip of said first expander out in a reverse direction; and (g) repeating steps (c) to (e) using a second threaded expander which has an increasing outer diameter and a substantially same threaded structure to said dental implant, starting by following a thread pattern created in steps (c) to (e), to further expand said second diameter of said once expanded osseotomy site laterally to a final diameter to obtain a twice expanded osseotomy site, wherein both said grooves and threads are expanded substantially from said first diameter of said initial osseotomy site; and said twice expanded osseotomy site has a complementary geometry to said dental implant, and both said grooves and said threads on said interior wall of said twice expanded osseotomy site are uniformly narrower than diameters of complementary elements of said dental implant so that said twice expanded osseotomy site enables said implant to sufficiently bite into and uniformly engage with surrounding bone tissues.