Calibration and adjustment determination of a surgical handpiece system
Inventors
Lambert, Trevor Jonathan • Simon, Adam • Schneider, Brendan • Sharma, Rahul
Assignees
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Publication Number
US-12426897-B2
Publication Date
2025-09-30
Expiration Date
Abstract
A surgical handpiece system capable of determining a suitable screw length for bone fixation with a bone plate that compensates an initial screw length value based on orientation of the surgical handpiece system during a drilling process. The surgical handpiece system comprising a surgical handpiece including a depth measurement extension and a sensor. The depth measurement extension may be configured to determine a thickness of bone when a drill bit is attached and used to drill through the bone. The sensor may be configured to generate an orientation signal responsive to orientation of the depth measurement extension. The surgical handpiece system also comprises a processor in communication with the sensor and configured to determine the suitable screw length for bone fixation based the sensor.
Core Innovation
The invention provides a surgical handpiece system to determine a suitable screw length for bone fixation with a bone plate by compensating an initial screw length value based on orientation of the surgical handpiece system during a drilling process. The system includes a depth measurement extension that defines a measurement axis and is movably coupled to a handpiece housing. The depth measurement extension is movable by a user between a reference orientation and a drilling orientation such that the measurement axis is aligned with a reference axis extending through a hole defined by the bone plate and then is set at an oblique drilling angle relative to the reference axis.
The surgical handpiece system generates an orientation signal responsive to orientation of the depth measurement extension. A processor receives signals from the sensor and determines the drilling angle based on the orientation signal. The processor determines a compensation length responsive to the drilling angle and determines the suitable screw length for bone fixation based on the compensation length. The drilling process uses a drill bit configured to be coupled to and receive torque from the motor disposed within the handpiece housing.
In the claimed method, the depth measurement extension is oriented to a reference orientation adjacent the bone plate so that the measurement axis aligns with the reference axis extending through a hole defined by the bone plate. A user input device is operated to establish that the measurement axis is aligned with the reference axis, after which the depth measurement extension is oriented to a drilling orientation such that the measurement axis is at an oblique angle to the reference axis. The oblique angle at the drilling orientation is measured, drilling is performed through a proximal cortex of a bone toward a distal cortex, and the processor determines the suitable screw length for bone fixation based on the oblique angle measurement, with the suitable screw length displayed.
Claims Coverage
The document includes three independent claims. Across the independent claims, the main inventive features center on compensating an initial screw length value using an oblique drilling angle derived from sensor-based orientation of a depth measurement extension relative to a bone-plate-defined reference axis.
Orientation-compensated screw length determination using a depth measurement extension
A surgical handpiece system determines a suitable screw length for bone fixation with a bone plate by compensating an initial screw length value based on orientation of the surgical handpiece system during a drilling process, including a depth measurement extension defining a measurement axis and movable between a reference orientation aligned with a reference axis through a bone-plate hole and a drilling orientation at an oblique drilling angle.
Sensor-generated drilling angle and compensation length
A processor receives an orientation signal from a sensor responsive to orientation of the depth measurement extension at the drilling orientation, determines the drilling angle of the depth measurement extension based on the orientation signal, determines a compensation length responsive to the drilling angle, and determines the suitable screw length for bone fixation based on the compensation length.
Screw-length determination method using reference alignment and oblique angle measurement
A method determines a suitable screw length for bone fixation by orienting a depth measurement extension so the measurement axis aligns with a reference axis extending through a bone-plate hole, establishing the alignment using a user input device, orienting the depth measurement extension to a drilling orientation at an oblique angle to the reference axis, measuring the oblique angle, drilling through a proximal cortex toward a distal cortex, determining the suitable screw length based on the oblique angle measurement, and displaying the suitable screw length.
Overall, the independent claims define screw-length determination that is compensated based on an oblique drilling angle obtained from sensor-driven orientation of a depth measurement extension relative to a bone-plate-referenced axis.
Stated Advantages
Compensates an initial screw length value based on orientation of the surgical handpiece system during a drilling process to determine a suitable screw length for bone fixation.
Documented Applications
Determining a suitable screw length for bone fixation with a bone plate during drilling through a proximal cortex of a bone toward a distal cortex, with the suitable screw length displayed.
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