US 5,470,230 AGranted

Anatomical dental implant with expandable root

OwnerFereidoun Daftary, Oded Bahatinventors

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Abstract

A dental implant assembly for supporting a dental component on a patient's jawbone. The dental implant assembly is fitted into a hole drilled in the jawbone. The dental implant assembly comprises an implant member having a hollow bottom sleeve split into multiple segments, a fixed shaft located inside the split bottom sleeve, and an expander member movably mounted on the fixed shaft and having a ramped surface engaging with the at least two split segments. The expander member is engaged with the bottom of the jawbone hole, and caused to move on the shaft as the implant member is installed into the jawbone hole, to thereby force the split segments to expand outwardly against and tightly engage with the interior sidewall of the jawbone hole. Therefore, the dental implant assembly can be securely installed into the patient's jawbone in a single step without any additional and separate step to operate the expander.

Claims20

Dependent claims

A dental implant assembly for supporting a dental component on a patient's jawbone, the dental implant assembly to be fitted into a hole which is drilled in the jawbone and has an interior sidewall and a bottom, the dental implant assembly comprising:

a. a generally cylindrical integral body member having a top section, a middle section and a bottom section;
b. said top section of said integral body member having a top end, an abrasive exterior surface for frictionally engaging with said interior sidewall of said jawbone hole, and an upward facing interior threaded bore for adopting said dental component;
c. said middle section of said integral body member having a threaded exterior surface for threadedly fastening to said interior sidewall of said jawbone hole, and a downward facing interior bore;
d. said bottom section of said integral body member having a hollow sleeve split into a multiplicity of longitudinally elongated segments each having a bottom end;
e. an elongated internal shaft member having a top end and a bottom end, and screw threads along a substantial portion of its length except the top end;
f. said top end of said internal shaft member press-fitted into said downward facing interior bore of said middle section of said integral body member for non-rotatably attaching said internal shaft member inside said split bottom section of said integral body member;
g. a frusto-conical shaped expander member having a small top end, a large bottom end, a beveled exterior surface, and a threaded interior bore extending from the top end to the bottom end for threadedly engaging with said bottom end of said internal shaft member;
h. said beveled surface of said expander member engaging with said bottom ends of said multiplicity of longitudinally elongated segments of said bottom section of said integral body member;
i. said bottom end of said expander member having means for anti-rotation engagement with said bottom of said jawbone hole;
and
j. said top end of said top section of said integral body member having means adaptable to a driving tool for rotating said integral body member to install it into said jawbone hole, causing said internal shaft member also to rotate, which in turn causes said expander member to move upwardly on said internal shaft member, to thereby force said multiplicity of longitudinally elongated segments of said bottom section of said integral body member to expand outwardly against and tightly engage with said interior sidewall of said jawbone hole;
k. whereby said dental implant assembly can be securely installed into said patient's jawbone in a single step without any additional and separate step to operate said expander.

9 more elements

a. an integral body member having an upper portion and a lower portion;
b. said upper portion of said integral body member having an exterior surface for engaging with said interior sidewall of said jawbone hole, and an upward facing interior bore for adopting said dental component;
c. said lower portion of said integral body member having a hollow sleeve split into a multiplicity of segments;
d. an internal shaft member having a top end and a threaded lower portion, the top end non-rotatably attached to said integral body member and located inside said split lower portion thereof;
e. an expander member having a small top end, a large bottom end, an exterior surface, and a threaded interior bore for threadedly engaging with said threaded lower portion of said internal shaft member;
f. said exterior surface of said expander member engaging with said multiplicity of segments of said lower portion of said integral body member;
g. said bottom end of said expander member having means for anti-rotation engagement with said bottom of said jawbone hole;
and
h. said integral body member further having means adaptable to a driving tool for rotating said integral body member to install it into said jawbone hole, causing said internal shaft member also to rotate, which in turn causes said expander member to move upwardly on said internal shaft member, to thereby force said multiplicity of segments of said lower portion of said integral body member to expand outwardly against and tightly engage with said interior sidewall of said jawbone hole;
i. whereby said dental implant assembly can be securely installed into said patient's jawbone in a single step without any additional and separate step to operate said expander.

7 more elements

Dependencies are inferred from the claim text.