Dave's PCF WIP: Paragraphs

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View Edit Delete	OPT-13	FIG. 33B illustrates positions for the medial dwell point 2435 and lateral dwell point 2436 during flexion of a joint that includes the tibial insert 2910b with a femoral component 2801 and tibial baseplate component 2840 of a right knee. The medial dwell point 2435 and lateral dwell point 2436 translate and/or rotate during flexion. Due, at least in part, to the contour of the tibial articulation surface 2412, the lateral dwell point 2436 migrates anteriorly and outwardly and the medial dwell point 2435 migrates posteriorly and outwardly. In certain embodiments, this migration of the dwell points facilitates tibiofemoral rotation within the medial tibial compartment 2413 during flexion of the knee joint where the condition is a valgus knee joint and/or adjusts mediolateral stability during flexion of the knee joint where the condition is a varus knee joint. In one embodiment, the tibial articulation surface 2412 may increases constraint on a lateral collateral ligament of the knee joint and decreases tension on a medial collateral ligament of the knee joint.	190	Added by DJM 1 2022	1/25/22, 12:00 AM
View Edit Delete	OPT-13	Referring still to FIG. 33B, in certain embodiments, the knee joint is a right knee joint of a patient. A left side tibial insert 2910b is attached to the insert interface 2841 of the tibial baseplate component 2840 of the right knee joint such that the left side tibial insert 2910b constrains the femoral articulation surface within the medial tibial compartment 2413 and mitigates the condition.	191	Added by DJM 1 2022	1/25/22, 12:00 AM
View Edit Delete	OPT-13	FIG. 34 is a perspective anterior view of knee prosthesis system 4000 according to another embodiment of the present disclosure. The knee prosthesis system 4000 is configured for use in a knee joint of a patient. The same knee prosthesis system 4000 can be used in a knee joint with a condition as well as in the same knee joint that lacks the condition. Advantageously, such a knee prosthesis system 4000 reduces the inventory needed to perform knee joint arthroplasty. In one embodiment, the knee prosthesis system 4000 includes a femoral component 4001, a tibial baseplate component 4040, a right tibial insert 4010, and a left tibial insert 4012.	192	Added by DJM 1 2022	1/25/22, 12:00 AM
View Edit Delete	OPT-13	In the illustrated embodiment, the femoral component 4001 and tibial baseplate component 4040 may be very similar to the like named components in the other embodiments disclosed herein. In one embodiment, the same femoral component 4001 and tibial baseplate component 4040 may be configured for use in either a right knee joint or a left knee joint of a patient. Alternatively, or in addition, the femoral component 4001 and/or tibial baseplate component 4040 may be specifically designed for a left knee joint or a right knee joint. By way of example, suppose the knee prosthesis system 4000 is to be deployed on a left knee of a patient (medial and lateral sides identified on the femoral component 4001 by an “M” and an “L”).	193	Added by DJM 1 2022	1/25/22, 12:00 AM
View Edit Delete	OPT-13	The medial posterior section 2822 may include the medial ramp 2838, which may begin at the medial high point 2827 and extend away from the medial high point 2827 anteriorly toward the medial low point 2828. Following the surface topography of the medial ramp 2838, the medial articulation surface 2820 tends to have a gradient from the medial high point 2827 toward the medial low point 2828 near the medial anterior section 2823 and to the medial perimeter 2826. The gradient of the lateral articulation surface 2821 flows to the lateral low point 2831. Therefore, movement down gradients on the medial articulation surface 2820 and lateral articulation surface 2821 may be asymmetric. The lateral articulation surface 2821 may be generally concave toward the lateral low point 2831. The location of the medial low point 2828 may cause the directionality of the gradient from the medial ramp 2838 along the medial articulation surface 2820, which causes an object or a mass to move down the gradient in the direction created by the medial ramp 2838. The medial ramp 2838 and the different heights along the medial perimeter 2826 and the medial articulation surface 2820 may create a medial dwell point 2835 that is transient along the gradient. The approximate gradients within medial tibial compartment 2813 and/or lateral tibial compartment 2814 are represented by dashed lines in FIG. 28F.	145	Added by DJM 1 2022	1/25/22, 12:00 AM
View Edit Delete	OPT-13	The femoral component 2801 may be posterior stabilizing or cruciate retaining. In FIG. 28A, the femoral component 2801, the tibial insert 2810, and the tibial baseplate component 2840 are shown in flexion. The femoral component 2801 may include medial condyle 2802 and lateral condyle 2803, similar to femoral component 114 in FIG. 9. The medial 2802 and lateral 2803 condyles may include medial condylar articulation surface 2804 and lateral condylar articulation surface 2805. The femoral component 2801 may include elements to secure the femoral component 2801 to a femur of a patient. For example, the femoral component 2801 may include at least one keel 2806 and at least one post 2807 that penetrate the bone of the associated femur (not shown) to secure the femoral component 2801 to the femur. The at least one post 2807 may be placed on the femoral side of the medial condyle 2802 and/or the lateral condyle 2803. The femoral component 2801 may include surface texturing on a bone-facing side to encourage bone in-growth and securement.	130	Added by DJM 1 2022	1/25/22, 12:00 AM
View Edit Delete	OPT-13	The tibial baseplate component 2840 may be configured to be secured to the tibia of the patient. The tibial baseplate component 2840 may include an insert interface 2841 configured for the placement and securement of the insert 2810, with one or more tibial posts 2842, which may be inserted and secured into a patient’s tibia. The tibial baseplate component 2840 may further have a base 2843, which, in certain embodiments, may also be designed to penetrate the tibial plateau, and may receive a separate keel (not shown) that penetrates more deeply into an intramedullary canal of the tibia.	131	Added by DJM 1 2022	1/25/22, 12:00 AM
View Edit Delete	OPT-13	FIG. 28A shows the exploded assembly 2800 from a lateral side configured for placement in a left knee and shown in approximately 90 degree extension, or “flexion.” While the tibial baseplate component 2840 and the femoral component 2801 may be medially and laterally symmetric across an anterior-posterior plane, the insert 2810 may be medially-laterally asymmetric. The insert 2810 may include a baseplate interface 2811 configured to mate or engage with the insert interface 2841 of the tibial baseplate component 2840. The baseplate interface 2811 may have features complementary to features on the insert interface 2841. The complementary features may allow for a removable fit for the tibial insert 2810. The removable fit may allow for a modular assembly 2800, benefitting the surgeon and the patient.	132	Added by DJM 1 2022	1/25/22, 12:00 AM
View Edit Delete	OPT-13	As used herein, an "interface" refers to an area, a boundary, or a place at which two separate and/or independent structures, members, apparatus, assemblies, components, and/or systems join, connect, are coupled, or meet and act on, or communicate, mechanically or electronically, with each other. In certain embodiments, "interface" may refer to a surface forming a common boundary of two bodies, spaces, structures, members, apparatus, assemblies, components, or phases. (search "interface" on Merriam-Webster.com. Merriam-Webster, 2021. Web. 15 Nov. 2021. Modified.) In certain embodiments, the term interface may be used with an adjective that identifies a type or function for the interface. For example, an engagement interface may refer to one or more structures that interact or connect to mechanically join or connect two separate structures, each connected to a side of the interface.	133	Added by DJM 1 2022	1/25/22, 12:00 AM
View Edit Delete	OPT-13	In some embodiments, the tibial baseplate component 2840 and the femoral component 2801 may be symmetric, as mentioned previously, enabling them to be used for either left or right knee replacements. In certain embodiments, the tibial insert 2810 may be specific to one side of a patient or the other. An assembly for either left or right knee arthroplasty may include a single femoral component 2801, a single tibial baseplate component 2840, and two (e.g., left and right) inserts 2410, 2810. This may greatly reduce the inventory requirements for the system.	134	Added by DJM 1 2022	1/25/22, 12:00 AM
View Edit Delete	OPT-13	Opposite the baseplate interface 2811, the tibial insert 2810 includes a tibial articulation surface 2812 configured for engagement with the medial condyle 2802 and lateral condyle 2803 on the femoral component 2801. The tibial articulation surface 2812 may be a superior side of the tibial insert 2810. The tibial articulation surface 2812 may include a medial tibial compartment 2813 and a lateral tibial compartment 2814. In certain embodiments, the medial tibial compartment 2813 and/or the lateral tibial compartment 2814 may be respectively defined by a medial perimeter and a lateral perimeter, discussed more below.	135	Added by DJM 1 2022	1/25/22, 12:00 AM
View Edit Delete	OPT-13	The medial tibial compartment 2813 may include a medial articulation surface 2820 for direct engagement with the medial condylar articulation surface 2804. The lateral tibial compartment 2814 may include a lateral articulation surface 2821 for direct engagement with the lateral condylar articulation surface 2805. The medial condylar articulation surface 2804 may engage with the medial articulation surface 2820 at a medial dwell point 2835 (shown in subsequent figures). The lateral condylar articulation surface 2805 may engage with the lateral articulation surface 2821 at a lateral dwell point 2836 (shown in subsequent figures). In certain embodiments, the medial articulation surface 2820 may include a medial ramp 2838, which, In certain embodiments, may have no counterpart on the lateral articulation surface 2821 and may create at least part of the asymmetry between the medial tibial compartment 2813 and the lateral tibial compartment 2814.	136	Added by DJM 1 2022	1/25/22, 12:00 AM
View Edit Delete	OPT-13	In certain embodiments, the assembly 2800 may include a longitudinal axis 2846. The longitudinal axis 2846 may generally indicate an area or vicinity where a condyle articulation surface rotates during tibiofemoral rotation that occurs during arthrosis (joint) flexion. The present disclosure supports one or more embodiments of a knee assembly, for example assembly 2800, that enables, facilitates, and/or provides for tibiofemoral rotation about a longitudinal axis within a medial tibial compartment 2813 (as shown by longitudinal axis 2846 in FIG. 28A). Alternatively, or in addition, tibiofemoral rotation may be about a longitudinal axis within a lateral tibial compartment 2814. In certain embodiments, the shape and/or contour of a lateral articulation surface and/or a medial articulation surface can influence whether the longitudinal axis is within the lateral tibial compartment (generally defined by the lateral articulation surface) or the medial tibial compartment (generally defined by the medial articulation surface).	137	Added by DJM 1 2022	1/25/22, 12:00 AM
View Edit Delete	OPT-13	The present disclosure includes embodiments for which the tibial articulation surface 2812 is contoured to position a longitudinal axis of tibiofemoral rotation within a desired or engineered compartment of the tibial articulation surface 2812. Generally, the more constraint a tibial articulation surface 2412,2812 imparts on a condyle of the femoral component, the more rotation about an axis within that area of the tibial articulation surface 2412,2812. For example, to position the longitudinal axis 2446 within the medial articulation surface 2420 of the tibial articulation surface 2412, the medial articulation surface 2420 is contoured to impose more constraint on the medial condylar articulation surface 2404 of the medial condyle 2402 than the lateral articulation surface 2421. Similarly, to position the longitudinal axis 2846 within the lateral articulation surface 2821 of the tibial articulation surface 2812, the lateral articulation surface 2821 is contoured to impose more constraint on the lateral condylar articulation surface 2805 of the lateral condyle 2803 than the medial articulation surface 2820.	138	Added by DJM 1 2022	1/25/22, 12:00 AM
View Edit Delete	OPT-13	As used herein, “constraint” refers to refers to an apparatus, instrument, structure, device, component, system, or assembly that is structured, organized, configured, designed, arranged, or engineered to prevent, limit, impede, stop, or restrict motion or movement and/or operation of the another object, member, structure, component, part, apparatus, system, or assembly. (Search "constraint" on wordhippo.com. WordHippo, 2021. Web. Accessed 8 Dec. 2021. Modified.) In certain embodiments, "constraint" may refer to a state of an object being constrained, temporarily, permanently, before, after, and/or during motion.	139	Added by DJM 1 2022	1/25/22, 12:00 AM
View Edit Delete	OPT-13	In FIG. 28A, the lateral tibial compartment 2814 and/or medial tibial compartment 2813 are configured such that the longitudinal axis 2846 for tibiofemoral rotation is within the medial tibial compartment 2813. In FIG. 24A, the lateral tibial compartment 2814 and/or medial tibial compartment 2813 are configured such that the longitudinal axis 2446 is within a medial tibial compartment, which may be generally defined by the medial articulation surface 2420. Knee assemblies that are configured, designed, and/or engineered for tibiofemoral rotation is within the lateral tibial compartment 2814 may be referred to as lateral pivot design knee assemblies. Knee assemblies that are configured, designed, and/or engineered for tibiofemoral rotation is within the medial tibial compartment may be referred to as medial pivot design knee assemblies. With certain patients it may be desirable to use a lateral pivot design knee assembly in a left knee and a medial pivot design knee assembly in a right knee. Alternatively, or in addition, it may be desirable to use a medial pivot design knee assembly in a left knee and a lateral pivot design knee assembly in a right knee. Alternatively, or in addition, it may be desirable to use a lateral pivot design knee assembly or a medial pivot design knee assembly in either or both of a left knee and a right knee.	140	Added by DJM 1 2022	1/25/22, 12:00 AM
View Edit Delete	OPT-13	FIGS 28B-28D show details of the shape and/or contours of the tibial insert 2810. FIG. 24B is a posterior view of the tibial insert 2810. FIG. 28C is an anterior view of the tibial insert 2810. The medial tibial compartment 2813 may include a medial posterior side 2815 and a medial anterior side 2817. The medial articulation surface 2820 may include a medial posterior section 2822 and a medial anterior section 2823 surrounded by a medial perimeter 2826. As used herein, "medial perimeter" refers to a perimeter that is near or about a medial compartment. The lateral tibial compartment 2814 may include a lateral posterior side 2816 and a lateral anterior side 2818. The lateral articulation surface 2821 may include a lateral posterior section 2824 and a lateral anterior section 2825 surrounded by a lateral perimeter 2829. As used herein, "lateral perimeter" refers to a perimeter that is near or about a lateral compartment.	141	Added by DJM 1 2022	1/25/22, 12:00 AM
View Edit Delete	OPT-13	FIGS 28D and 28E show lateral and medial views of the tibial insert 2810, respectively. In 24D, the lateral articulation surface 2821 with lateral perimeter 2829 is shown. The lateral articulation surface 2821 may meet the lateral perimeter 2829 at a lateral high point 2830. As used herein, "lateral high point" refers to a point or an area of a lateral compartment that is higher within the lateral compartment than other points or areas within the lateral compartment. The lateral low point 2831 may include a lateral low point 2831 that may be toward the center of the lateral articulation surface 2821. As used herein, "lateral low point" refers to a point or an area of a lateral compartment that is lower within the lateral compartment than other points or areas within the lateral compartment.	142	Added by DJM 1 2022	1/25/22, 12:00 AM
View Edit Delete	OPT-13	In 28E, the medial articulation surface 2820 with medial perimeter 2826 is shown. The medial articulation surface 2820 may meet the medial perimeter 2826 at a medial high point 2827 at, near, or adjacent to the medial posterior section 2822. As used herein, "medial high point" refers to a point or an area of a medial compartment that is higher within the medial compartment than other points or areas within the medial compartment. The medial articulation surface 2820 may include a medial low point 2828 closer to the medial anterior section 2823 and toward the medial perimeter 2826. As used herein, "medial low point" refers to a point or an area of a medial compartment that is lower within the medial compartment than other points or areas within the medial compartment.	143	Added by DJM 1 2022	1/25/22, 12:00 AM
View Edit Delete	OPT-13	The high points 2827,2830 and low points 2828,2831 on both the lateral articulation surface 2821 and medial articulation surface 2820 are in relation to the baseplate interface 2811. The difference between the medial high point 2827 and the medial low point 2828 may be greater than the difference between the lateral high point 2830 and the lateral low point 2831 The greater difference in height on the medial articulation surface 2820 may be represented by the medial ramp 2838 (See representation in FIG. 28F).	144	Added by DJM 1 2022	1/25/22, 12:00 AM

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