20240041500. PIVOTAL BONE ANCHOR ASSEMBLY WITH BIASING MEMBER FOR PRE-LOCK FRICTION FIT simplified abstract (Unknown Organization)
PIVOTAL BONE ANCHOR ASSEMBLY WITH BIASING MEMBER FOR PRE-LOCK FRICTION FIT
Organization Name
Inventor(s)
Roger P. Jackson of Prairie Village KS (US)
James L. Surber of Kansas City KS (US)
PIVOTAL BONE ANCHOR ASSEMBLY WITH BIASING MEMBER FOR PRE-LOCK FRICTION FIT - A simplified explanation of the abstract
This abstract first appeared for US patent application 20240041500 titled 'PIVOTAL BONE ANCHOR ASSEMBLY WITH BIASING MEMBER FOR PRE-LOCK FRICTION FIT
Simplified Explanation
The pivotal bone anchor assembly described in the patent application consists of a pre-assembled receiver assembly and a bone anchor. The receiver assembly has a channel for receiving a rod and an axial bore with a recess and a spherical seating surface. The bone anchor has a capture portion that can be inserted into the receiver assembly through a lower opening. A retainer is used to capture the capture portion within the axial bore, while the bone anchor extends downward through the lower opening. A pressure insert is included in the receiver assembly, with an upper surface that engages the rod and a lower surface that engages the capture portion. The receiver assembly also includes a pair of partially annular shaped members that overlap with the pressure insert and bias it against the capture portion, creating a pre-lock friction fit for the pivotal bone anchor assembly.
- The patent describes a pivotal bone anchor assembly with a pre-assembled receiver assembly and a bone anchor.
- The receiver assembly has a channel for a rod and an axial bore with a recess and a spherical seating surface.
- The bone anchor has a capture portion that can be inserted into the receiver assembly through a lower opening.
- A retainer is used to capture the capture portion within the axial bore, while the bone anchor extends downward through the lower opening.
- A pressure insert is included in the receiver assembly, with an upper surface that engages the rod and a lower surface that engages the capture portion.
- The receiver assembly also includes partially annular shaped members that overlap with the pressure insert and bias it against the capture portion, creating a pre-lock friction fit.
Potential Applications
- Orthopedic surgeries
- Spinal fusion procedures
- Joint replacement surgeries
Problems Solved
- Provides a secure and stable connection between a bone anchor and a rod
- Simplifies the assembly process by using a pre-assembled receiver assembly
- Allows for easy insertion and capture of the bone anchor
Benefits
- Enhanced stability and support for bone anchors
- Improved surgical efficiency and ease of use
- Reduced risk of complications or failure in bone anchor systems
Original Abstract Submitted
a pivotal bone anchor assembly includes a pre-assembled receiver assembly and a bone anchor with a capture portion uploadable into the receiver assembly through a lower opening. the receiver assembly includes a receiver defining a channel for receiving a rod and an axial bore having a recess and a spherical seating surface above the lower opening. the receiver assembly also includes a retainer operable to capture the capture portion within the axial bore with the bone anchor extending downward through the lower opening, and a pressure insert having an upper surface operable to engage the elongate rod and a lower surface operable to engage the capture portion. the receiver assembly further includes a pair of opposed, partially annular shaped members in overlapping engagement with the pressure insert and configured to bias the pressure insert against the capture portion to provide a pre-lock friction fit for the pivotal bone anchor assembly.
