Osteotome and handpiece adapter assembly and powered surgical handpiece assembly including an osteotome

A handpiece adapter assembly for a powered surgical handpiece comprising

• a handpiece adapter for being removably coupled with a rotatable drive shaft of a powered surgical handpiece and having a front drive shaft and a motion converting mechanism by which rotary motion of the drive shaft of the handpiece is converted to reciprocating motion of said front drive shaft;
• and
• an osteotome removably coupled to said front drive shaft for being reciprocatively driven thereby and including an elongate shaft having a distal end, a proximal end removably coupled to said front drive shaft and a cutting element at said distal end, said cutting element including a longitudinal axis and a distal length portion having a lower part and an upper part extending distally of said lower part, said upper part being defined by an upper surface of said cutting element and by lateral surfaces, said lower part being defined by a lower surface of said cutting element and by lateral surfaces disposed laterally inwardly of said lateral surfaces of said upper part, said upper part having a width between said lateral surfaces of said upper part tapering in a distal direction to a blunt tip, said lower part having a width between said lateral surfaces of said lower part tapering in said distal direction to a cutting edge disposed transverse to said axis, said width of said lower part tapering in said distal direction with a steeper taper than said width of said upper part, said cutting edge being adapted to cut anatomical tissue when said cutting element is advanced distally along the tissue while being reciprocated by said front drive shaft, said blunt tip being disposed distally of said cutting edge, said tip leading said cutting element as it is advanced distally along the tissue.

A powered surgical handpiece assembly comprising

• a powered surgical handpiece having a rotatable drive shaft;
• a handpiece adapter removably coupled with said rotatable drive shaft and having a front drive shaft and a motion converting mechanism by which rotary motion of said rotatable drive shaft is converted to reciprocating motion of said front drive shaft;
• and
• an osteotome removably coupled to said front drive shaft for being reciprocatively driven thereby and including an elongate shaft having a distal end, a proximal end removably coupled to said front drive shaft and a cutting element at said distal end, said cutting element including a longitudinal axis and a distal length portion having a lower part and an upper part extending distally of said lower part, said upper part being defined by an upper surface of said cutting element and by lateral surfaces extending distally to a blunt tip, said upper part having a width between said lateral surfaces tapering distally to said tip, said lower part being defined by a lower surface of said cutting element and by lateral surfaces disposed laterally inwardly of said lateral surfaces of said upper part, said lateral surfaces of said lower part extending distally to merge at a cutting edge disposed transverse to said axis, said lower part having a width between said lateral surfaces of said lower part, said width of said lower part tapering distally to said cutting edge and being more steeply tapered than said width of said upper part, said cutting edge being adapted to cut anatomical tissue when said cutting element is advanced distally along the tissue while being reciprocated by said front drive shaft, said blunt tip being disposed distally of said cutting edge, said tip leading said cuffing element as it is advanced distally along the tissue.

A surgical osteotome for being reciprocatively driven to cut anatomical tissue at an operative site in a patient's body comprising

• an elongate shaft having a distal end and having a proximal end by which said elongate shaft is reciprocated;
• and
• a cutting element at said distal end including a longitudinal axis and a distal length portion having a lower part and an upper part extending distally of said lower part, said upper part being defined by an upper surface of said cutting element and by lateral surfaces angled inwardly toward one another in a distal direction, said upper part having a width between said lateral surfaces tapering in said distal direction with a first taper, said lower part being defined by a lower surface of said cutting element and by lateral surfaces angled inwardly toward one another in said distal direction at a greater angle than said lateral surfaces of said upper part, said lower part having a width between said lateral surfaces of said lower part tapering in said distal direction with a second taper, greater than said first taper, said lateral surfaces of said lower part being disposed laterally inwardly of said lateral surfaces of said upper part, said lateral surfaces of said lower part extending distally to meet at a cutting edge, said lateral surfaces of said upper part extending distally to a rounded tip disposed distally of said cutting edge, said cutting edge extending between said tip and said lower surface of said cutting element and being adapted to cut anatomical tissue when said cutting element is advanced distally along the tissue while being reciprocated along with said shaft, said tip leading said cutting element as it is advanced distally along the anatomical tissue.

A surgical osteotome for being reciprocatively driven to cut anatomical tissue at an operative site in a patient's body comprising

• an elongate shaft having a distal end and having a proximal end by which said elongate shaft is reciprocated;
• and
• a cutting element at said distal end including a longitudinal axis, a proximal length portion extending distally from said distal end of said shaft and a distal length portion extending distally from said proximal length portion, said proximal length portion having an upper surface, a lower surface and a pair of lateral surfaces angled inwardly toward one another from said distal end of said shaft, said distal length portion having a lower part and an upper part extending distally of said lower part, said upper part being defined by an upper surface of said distal length portion and by a pair of lateral surfaces angled inwardly toward one another from said lateral surfaces, respectively, of said proximal length portion, said lateral surfaces of said upper part extending distally to a rounded tip, said lower part being defined by a lower surface of said distal length portion and by a pair of lateral surfaces angled inwardly toward one another from said lateral surfaces, respectively, of said proximal length portion at a greater angle than said lateral surfaces of said upper part, said lateral surfaces of said lower part extending distally to merge at a cutting edge, said lateral surfaces of said lower part being disposed laterally inwardly of said lateral surfaces of said upper part, said cutting edge being adapted to cut anatomical tissue when said cutting element is advanced distally along the tissue while being reciprocated, along with said shaft, said tip being disposed distally of said cutting edge to lead said cutting element as it is advanced distally along the anatomical tissue.