Surgical guide for use during sinus elevation surgery utilizing the Caldwell-Luc osteotomy
OwnerYehia Aly Massoudinventor
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Abstract
The present invention discloses a surgical guide and accompanying depth bur with a method for its use during sinus elevation surgery utilizing the Caldwell-Luc Osteotomy procedure. The surgical guide of the present invention provides accurate transfer of the parameters of the surgical osteotomy to be performed during sinus elevation surgery. It bridges the gap between the precise information obtained from the CT scan and the surgical field on which this surgical plan must be placed. This is accomplished by the use of the surgical guide which is constructed based on the information in the CT scan and the treatment plan prepared utilizing 3-D imaging software.
Claims22
Surgical guide for performing a sinus elevation procedure on a specific patient's maxillary sinus by penetrating a lateral bony wall proximate a maxillary sinus of the patient, said lateral wall having an external surface, and a varying length, height and depth extending along an X-axis, a Y-axis, and a Z-axis, respectively, said surgical guide comprising:
- a curvilinear-shaped structure for placement adjacent to and in direct and continuous contact with the external surface of said lateral wall of the maxillary sinus, said curvilinear-shaped structure having a three-dimensional window configured for placement directly over a portion of said lateral wall of the maxillary sinus and to define a surgical site to perform the sinus elevation, said window being sized to receive a dental bur and formed with a patient-specific custom-shaped peripheral edge that defines at least one elongated ledge having a length that extends in a direction along the X-axis of the lateral wall, the ledge having varying surface contours formed in X-Y and Z-X planes extending along the length to correspond to and align with surface contours formed in the X-Y and Z-X planes of the lateral wall at the surgical site, the ledge being configured to provide continuous contact with the lateral wall along its entire length at the surgical site, wherein the ledge includes a variable depth in the Z-X plane and is configured to directly correspond to thickness variations along the Z-X plane of the patient's lateral wall, said window being sized greater than a diameter of the bur to permit movement, guidance and depth control of the bur in three-dimensions along the custom-shaped peripheral edge and surface contours of the window.
A method of performing sinus elevation surgery to penetrate a bony lateral wall proximate a maxillary sinus of a specific patient, comprising:
- providing a treatment plan having three-dimensional images which characterize a plurality of bony walls including the lateral wall defining a portion of the maxillary sinus and maxillary bone structures of said patient, said plurality of walls having dimensions, shape, and contours formed along surface portions of the walls that are unique to the patient;
- and
- providing a customized surgical guide based on said treatment plan for placement adjacent to and in direct contact with said lateral wall of the patient's maxillary sinus, said guide having a three-dimensional window that defines a surgical site, said window being configured to receive and sized greater than a dental bur which is used to penetrate the lateral wall, said window formed by a customized peripheral edge defining a customized ledge that is elongated in shape, said ledge further including customized surface contours that are positioned to correspond to and align with the uniquely shaped contours formed along external surface portions of the lateral wall, the length of the ledge being configured for continuous contact in its entirety with the lateral wall at the surgical site of the patient, said ledge having a customized thickness to guide and control the depth of penetration of the distal end of the bur while the bur moves in three dimensions along the elongated ledge.
A surgical guide system for performing a sinus elevation procedure by penetrating an outer surface of an irregularly-shaped lateral wall of a maxillary bone forming a maxillary sinus of a specific patient, the system comprising:
- a treatment plan including a CT-scan and three-dimensional images which characterize a plurality of walls defining the maxillary sinus and maxillary bone structures of the patient, said plurality of walls having irregular dimensions, shapes, and contours formed along surface portions of the walls that are unique to each patient, said lateral wall having a length extending along an X-axis, a height extending along a Y-axis, and a depth extending along a Z-axis, said lateral wall having a convex-shape extending along the X-axis;
- a curvilinear-shaped structure having a three-dimensional window for placement directly over a portion of the outer surface of the patient's lateral wall of the maxillary bone to define a surgical site to perform the sinus elevation, said window being sized to receive a dental bur and formed with a customized peripheral edge that defines at least one elongated ledge having a length that extends along the X-axis of the lateral wall, the elongated ledge being concave in shape at least along its inner surface and along the X-axis, and having a surface contour that interfaces with and conforms to a surface contour of the convex-shaped lateral wall of the patient, wherein said elongated ledge is configured for continuous contact along its entire length with the lateral wall at the surgical site;
- said elongated ledge having a customized variable depth along the Z-axis which corresponds to and aligns with thickness variations of the patient's lateral wall, said window being sized greater than a diameter of the bur to permit movement, guidance and depth control of the bur in three-dimensions along the customized peripheral edge and surface contours of the window;
- and
- wherein the curvilinear-shaped structure and window are customized in shape and dimension to conform to the unique and irregularly-shaped and dimensioned lateral wall of the patient's maxillary bone at the surgical site, as determined by the CT-scan and three-dimensional images of the treatment plan.
Dependencies are inferred from the claim text.