Dave's PCF WIP: Paragraphs

Paragraphs

Actions	Application	Content	Paragraph Number	Notes	Modified
		Content		Paragraph Number	Notes	Any Field
View Edit Delete	FLO-4	7. The implant assembly of claim 1, wherein the bone plate comprises a recess adapted to receive the rotatable structure, the recess comprising a first flat surface adapted to engage a first corresponding surface of the rotatable structure to limit rotation of the rotatable structure beyond a locked orientation.	108	Added by DJM 5 2021	5/1/21, 12:00 AM
View Edit Delete	FLO-4	8. The implant assembly of claim 1, wherein the screw opening is configured to enable the screw to pivot within the screw opening within a range of motion ranging between approximately 45 degrees and approximately -45 degrees and wherein the head feature and lock feature are adapted to engage with each other with the screw pivoting within the range of motion and the rotatable structure in the locked orientation.	109	Added by DJM 5 2021	5/1/21, 12:00 AM
View Edit Delete	FLO-4	9.An implant assembly, comprising:	110	Added by DJM 5 2021	5/1/21, 12:00 AM
View Edit Delete	FLO-4	a screw adapted to engage bone of a patient, the screw comprising a head comprising a head feature;	111	Added by DJM 5 2021	5/1/21, 12:00 AM
View Edit Delete	FLO-4	an implant adapted to receive the screw, the implant comprising:	112	Added by DJM 5 2021	5/1/21, 12:00 AM
View Edit Delete	FLO-4	Specifically, the head 210 may have a socket 230 with a non-circular shape that engages a boss (not shown) on a driver with a corresponding male shape. As shown in FIG. 2D, the socket 230 may have a star shape with rounded points. Further, the head 210 may have a threaded socket 232 distal to the socket 230. The threaded socket 232 may receive a corresponding threaded boss (not shown) on a driver. In some embodiments, a driver (not shown) may have the boss and the threaded boss described above, so that the driver can mate with both the socket 230 and the threaded socket 232 for secure engagement with the head 210 of the screw 104, allowing the driver to advance or withdraw the screw 104.	57	Added by DJM 5 2021	5/1/21, 12:00 AM
View Edit Delete	FLO-4	In one embodiment, the screw opening 106 includes a semispherical seat 140 (FIG. 1) that can engage a semispherical rim 222 of the head 210. The semispherical rim 222 and the semispherical seat 140 may have similar or the same radii of curvature so that the semispherical rim 222 can reside in the semispherical seat 140 in any of a variety of relative orientations, about all three orthogonal axes.	67	Added by DJM 5 2021	5/1/21, 12:00 AM
View Edit Delete	FLO-4	FIG. 3A also illustrates a way the radial grooves 116 of the rotatable structures 112 interlock with the raised ridges 216 on the heads 210 of the screws 104. In the locked orientation, the radial grooves 116 may be oriented generally parallel to the raised ridges 216 that they overlie, as more clearly shown in FIG. 1A.	66	Added by DJM 5 2021	5/1/21, 12:00 AM
View Edit Delete	FLO-4	FIG. 3A illustrates details of a recess 120 of the bone plate 108. In one embodiment, the recess 120 includes a rim 304 that may partially surround the recess 120. In certain embodiments, the rim 304 may include a feature for a detent mechanism that includes a structure on the rim 304 and a structure of the rotatable structure 112. For example, as illustrated in FIG. 1, the rim 304 can include a niche 130 and the rotatable structure 112 can include an ear 132 configured to seat within the niche 130.	65	Added by DJM 5 2021	5/1/21, 12:00 AM
View Edit Delete	FLO-4	FIG. 3A depicts the implant assembly 100 of FIG. 1A, in use with a screw 302 according to an alternative configuration. The screw 302 has only a single thread start and may be more suitable than the screw 104 for use in healthy bone than the screw 104. The screw 302 is otherwise configured similarly to the screw 104.	64	Added by DJM 5 2021	5/1/21, 12:00 AM
View Edit Delete	FLO-4	The radial grooves 116 of each arm 114 may be similarly shaped to mate with the raised ridges 216 on the head 210 of the corresponding screw 104 such that the clockwise rotation of the screw 104 (corresponding to tightening of the screw 104 within the bone 102) is permitted, while counterclockwise rotation of the screw 104 (corresponding to loosening of the screw 104 within the bone 102) is not permitted while the rotatable structure 112 is in the locked orientation. Thus, the engagement of the arms 114 with the heads 210 of the screws 104 may prevent the screws 104 from rotating in a manner that would loosen them relative to the bones 102 in which they reside.	63	Added by DJM 5 2021	5/1/21, 12:00 AM
View Edit Delete	FLO-4	FIG. 2D illustrates details of a head feature 107 of the screw 104. The raised ridges 216 on the head 210 of each of the screws 104 may have sloping faces 218 that slope toward the distal end 204 of the screw 104, along the clockwise direction. The sloping faces 218 may be connected by engagement faces 220 that are parallel to or more nearly parallel to the axis of the screw 104. Thus, the raised ridges 216 may be readily driven clockwise into the bone with a driver (not shown) with mating engagement ridges that engage the engagement faces 220. Such a mating interface may not generally be suitable for rotating the screw 104 counterclockwise, as the engagement ridges may slide along the sloping faces rather than transmitting counterclockwise torque. Thus, the raised ridges 216 may present an interface that facilitates driving the screws 104 into the bones 102 and keeping them in place, but not withdrawal of the screws 104 from the bones.	62	Added by DJM 5 2021	5/1/21, 12:00 AM
View Edit Delete	FLO-4	As further shown in FIGS. 2B and 2C, the first screw thread 240 and the second screw thread 242 may each have a substantially constant major diameter and pitch. Where it is present, the second screw thread 242 may be spaced such that its threads bisect the space between adjacent threads of the first screw thread 240. In some embodiments, the first screw thread 240 and the second screw thread 242 may have tapered minor diameter 250 that is smaller at the intermediate portion 202 than near the head 210. This tapered minor diameter may compress the cortical portion of the bone 102 for maximum purchase in the cortical bone as the screw 104 is inserted. The first screw thread 240, distally of the second screw thread 242, may have a constant minor diameter 252 that preserves and reduces stress on the cancellous portion of the bone 102.	61	Added by DJM 5 2021	5/1/21, 12:00 AM
View Edit Delete	FLO-4	The first screw thread 240 and the second screw thread 242 may each have any known thread form. For example, the first screw thread 240 and the second screw thread 242 may be buttress threads, standard threads, square threads, and/or ACME threads, or may have any other thread shape known in the orthopedic field.	60	Added by DJM 5 2021	5/1/21, 12:00 AM
View Edit Delete	FLO-4	The shank 212 may optionally have multiple screw threads. For example, a first screw thread 240 may extend from the head 210 to the tip 214. The first screw thread 240 may be designed to penetrate both cortical and cancellous bone. A second screw thread 242 may extend from the head 210 to the intermediate portion 202 of the screw 104, between the head 210 and the tip 214. In some embodiments, the second screw thread 242 may extend along a length of the shank 212 that generally corresponds to the expected thickness of cortical bone in the bone 102. Thus, the denser and stronger cortical portion of the bone 102 is penetrated by both the first screw thread 240 and the second screw thread 242, while the weaker and more porous cancellous portion of the bone 102 receives only the first screw thread. Such a design may maximize purchase in the cortical portion of the bone, while avoiding exertion of too much shear stress on the cancellous bone.	59	Added by DJM 5 2021	5/1/21, 12:00 AM
View Edit Delete	FLO-4	The head 210 may be designed to work with a bone plate 108 by interfacing with the screw opening 106. For example, the head 210 may have a semispherical rim 222 that can engage a semispherical seat 140 of the screw opening 106. The semispherical rim 222 and the semispherical seat 140 may have similar or the same radii of curvature so that the semispherical rim 222 can reside in the semispherical seat 140 in any of a variety of relative orientations, about all three orthogonal axes.	58	Added by DJM 5 2021	5/1/21, 12:00 AM
View Edit Delete	FLO-4	As shown, the raised ridges 216 may be more spaced apart than the radial grooves 116. Thus, the rotatable structure 112, in the locked orientation, may interlock with the head 210 of the screw 302 reliably, despite minor variations in the exact orientation of the head 210. There may be, for example, two of the radial grooves 116 for each of the raised ridges 216 overlied by the radial grooves 116.	68	Added by DJM 5 2021	5/1/21, 12:00 AM
View Edit Delete	FLO-4	The head 210 may have the raised ridges 216 with sloping faces 218 and engagement faces 220, as described previously. Further, the head 210 may have additional features that optionally facilitate insertion of the screw 104 into the corresponding bone 102 and/or withdrawal of the screw 104 from the bone 102 (for example, as part of a revision procedure).	56	Added by DJM 5 2021	5/1/21, 12:00 AM
View Edit Delete	FLO-4	As shown in FIGS. 2A, 2B, and 2C, the screw 104 may have a proximal end 200, a distal end 204, and an intermediate portion 202 between the proximal end 200 and the distal end 204. The head 210 of the screw 104 may be at the proximal end 200, and the distal end 204 may terminate in a tip 214. A shank 212 may extend from the head 210 to the tip 214.	55	Added by DJM 5 2021	5/1/21, 12:00 AM
View Edit Delete	FLO-4	A wide variety of screws may be used in conjunction with a locking mechanism 110 as shown in FIG. 1A. In some examples, the screws 104 may be designed for use in osteoporotic bone, for example, for aging patients. FIGS. 2A, 2B, 2C and 2D are a perspective view, a front elevation view, a front/side elevation section view, and a top view, respectively, of the exemplary screw 104 of FIG. 1A.	54	Added by DJM 5 2021	5/1/21, 12:00 AM

Page 3 of 7, showing 20 record(s) out of 127 total