Static Computer-assisted Surgery
Static Computer-assisted Surgery - Related Videos
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Static Equilibrium - I
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A rigid body is said to be in dynamic equilibrium when both its linear and angular acceleration are zero, relative to an inertial frame of reference. This means that a body in equilibrium can be moving, but only when its linear and angular velocities are constant. A rigid body is said to be in static equilibrium when it is at rest in the selected frame of reference. The distinction between static equilibrium (e.g., a state of rest) and dynamic equilibrium (e.g, a state of uniform motion) is...
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Static equilibrium is a special case in mechanics that is very important in everyday life. It occurs when the net force and the net torque on an object or system are both zero. This means that both the linear and angular accelerations are zero. Thus, the object is at rest, or its center of mass is moving at a constant velocity. However, this does not mean that no forces are acting on the object within the system. In fact, there are very few scenarios on Earth in which no forces are acting upon...
FAQs
The virtual plan converts preoperative anatomical information into intended surgical geometry, including positions, angles, or resection boundaries. That digital plan then determines the design of the physical guide or patient-specific instrument. Because the guide represents the planned geometry, accuracy depends on preserving the relationship between the imaging data, the virtual plan, and the patient’s anatomy during execution.
Static computer-assisted surgery transfers guidance from a completed preoperative plan through a physical guide, template, or instrument. It does not provide real-time intraoperative navigation while the procedure is underway. This distinction makes accurate planning and reliable guide placement especially important, because the planned information must be transferred correctly to the operating field without continuous digital tracking.
Four linked factors determine whether the planned geometry is transferred accurately: the quality of preoperative imaging, correct registration between digital data and anatomy, precise fabrication of the guide or instrument, and stable placement during surgery. A weakness in any link can affect planned positions, angles, or resection boundaries, reducing the consistency and predictability of the procedure.
The workflow begins with preoperative imaging, followed by creation of a virtual treatment plan. Planned positions, angles, or resection boundaries are then incorporated into a physical guide, template, or patient-specific instrument. During surgery, the device is placed in relation to the anatomy and used to transfer the planned geometry to the operating field.
The approach can support implant placement, bone reconstruction, and selected orthopedic or craniofacial operations. These procedures benefit when accurate alignment, controlled positioning, or defined resection boundaries matter. By transferring a preoperative plan into the surgical field, the method can help preserve healthy structures and promote more predictable execution when the guide remains securely positioned.
Its medical value comes from improving the consistency with which a carefully prepared plan is executed. In suitable operations, planned guidance can support alignment, help preserve healthy structures, and make outcomes more predictable. The method is particularly relevant when anatomy can be represented accurately before surgery and when a stable physical guide can reproduce the intended geometry.