Patient-specific systems and methods are provided for assisting in medical procedures, and can include producing patient-specific devices from computer models of a patient's anatomy, including a first patient-specific device configured to identify and allow access to a resection area in an operation location for a medical procedure; a second patient-specific device configured to refine the procedure, following use of the first patient-specific device and in some embodiments, to identify and allow access to installation locations for an implant and/or surgical hardware; and/or a third patient specific device configured to assist in confirming placement of the implant and/or surgical hardware and refining the procedure, following use of the first and second patient-specific devices. Each of these devices may be developed from patient-specific computer model data via patient-specific image data and may enhance a variety of procedures.

Embodiments of the invention provide a surgical instrument for removing a hook nasal hump. The surgical instrument includes a handle including a blade having a prominent edge at a front end thereof, and guide members coupled to both sides of the handle and configured to slide the handle; forward and backward. The surgical instrument further includes a mounting concave portion configured to mount the nasal hump, which is a surgical subject, formed at a front portion of the guide members, and an upper and a lower plate, each having a shape of a flat sheet and a predetermined length. The blade of the handle is integrated between the upper plate and the lower plate, a width of the blade is smaller than a width of the upper and lower plates, sliding grooves are formed between both sides of the blade and the upper and lower plates, and the guide members comprise rod-shaped rails inserted into the sliding grooves, so as to slide the handle. The surgical instrument further includes mounting rods of which one side of each mounting rod is coupled to a front portion of each rail and of which the other side is coupled to the mounting concave portion for hooking onto the nasal hump.

Embodiments of the present invention provide methods for performing dacryocystorhinostomy and an apparatus for performing dacryocystorhinostomy (DCR), the apparatus comprising a dacryocystorhinostomy (DCR) tool, which includes a perforating shaft having a distal perforating-shaft perforating tip configured to form a bypass between a lacrimal sac and a nasal cavity through a lateral side of the lacrimal sac, a lacrimal bone, and nasal mucosa and a DCR guide, which includes a nasal guide component, which is configured to be inserted into the nasal cavity and has a nasal-guide channel having a proximal opening and an at least partially laterally facing distal opening, and a lacrimal guide component, which is shaped so as to define a lacrimal-guide channel that is configured to orient the distal perforating-shaft perforating tip with respect to the DCR guide during advancing of the distal perforating-shaft perforating tip through a lacrimal passageway and into the lacrimal sac, until the distal perforating-shaft perforating tip at least crosses the laterally facing distal opening of the nasal guide component, and wherein the DCR guide is configured to constrain the laterally facing distal opening of the nasal guide component to fall in a path of advancement of the distal perforating-shaft perforating tip.

An accurate and precise surgical guide for dental procedures, especially a procedure involving a subject with few or no teeth as well as methods for making and use of such guides.

A dacryocystorhinostomy (DCR) tool (10) includes a perforating shaft (30) having a distal perforating tip (32) configured to form a bypass between a lacrimal sac and a nasal cavity through a lateral side of the lacrimal sac, a lacrimal bone, and nasal mucosa. A DCR guide (20) includes a nasal guide component (40) configured to be inserted into the nasal cavity and having a distal guide tip (42); and a lacrimal guide component (50) shaped so as to define a guide channel (52) that orients the DCR guide (20) with respect to the distal perforating tip (32) during advancing of the distal perforating tip (32) through a lacrimal passageway and into the lacrimal sac, until contact of the distal perforating tip (32) with the distal guide tip (42) blocks further advancing of the distal perforating tip (32). The DCR guide (20) constrains the distal guide tip (42) to fall in a path of advancement of the distal perforating tip (32). Other embodiments are also described.

An accurate and precise surgical guide for dental procedures, especially a procedure involving a subject with few or no teeth as well as methods for making and use of such guides.

A dacryocystorhinostomy (DCR) tool (10) includes a perforating shaft (30) having a distal perforating tip (32) configured to form a bypass between a lacrimal sac and a nasal cavity through a lateral side of the lacrimal sac, a lacrimal bone, and nasal mucosa. A DCR guide (20) includes a nasal guide component (40) configured to be inserted into the nasal cavity and having a distal guide tip (42); and a lacrimal guide component (50) shaped so as to define a guide channel (52) that orients the DCR guide (20) with respect to the distal perforating tip (32) during advancing of the distal perforating tip (32) through a lacrimal passageway and into the lacrimal sac, until contact of the distal perforating tip (32) with the distal guide tip (42) blocks further advancing of the distal perforating tip (32). The DCR guide (20) constrains the distal guide tip (42) to fall in a path of advancement of the distal perforating tip (32). Other embodiments are also described.

An attainment with an osteotomy surgical instrument for the nasal osteotomy is described; it is set up of at least a couple of lever arms and a couple of sharp spouts that are mutually hinged at least in a rotation fulcrum, where said sharp spouts show an active portion with the cross sectional having a sharp angle, in which the sharp angles of the two sharp spouts are opposed and said active portion extends for a length greater than 30 mm and shorter than 45 mm.

A tool, consisting of an enclosure and a rotatable knob retained by, and protruding from, the enclosure. The tool has a tube having a proximal end that is retained by the enclosure, and the tube has an axis of symmetry. A Geneva drive is retained within the enclosure, the Geneva drive consisting of a drive wheel fixedly attached to the rotatable knob and a driven wheel fixedly attached to the proximal end of the tube, so that an axis of rotation of the driven wheel coincides with the axis of symmetry of the tube. Thus, a continuous rotation of the rotatable knob causes the tube to rotate about the axis of symmetry in discrete angular steps.

A device for guiding a surgical instrument at a surgical site, comprising: at least one guide channel sized and fitted to slidingly accommodate a surgical instrument, said guide channel defining a guide longitudinal axis; and at least one guide support leg coupled to said guide and defining a support leg longitudinal axis, wherein an angle (a) of said guide longitudinal axis in respect to a surface of a surgical site is defined by at least one of (i) a length (L) of said support leg, and (ii) an angle () between said guide longitudinal axis and said support leg longitudinal axis.