TRIAL IMPLANT

Abstract

TITLE OF INVENTION: TRIAL IMPLANT The present disclosure discloses a trial implant (100) including a proximal end (100a), a distal end (100b), a socket member (110) disposed at the proximal end (100a), and a base member (130) disposed at the distal end (100b). The socket member (110) includes a groove (113). The base member (130) is operationally coupled to the socket member (110). The base member (130) includes a projection (131) disposed movably at least partially within the groove (113) of the socket member (110). The socket member (110) and the base member (130) attains an appropriate offset from a plurality of pre-configured offsets defined by the trial implant (100). Fig. 1

Specification

Description:FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(Section 10 and Rule 13)

1. TITLE OF THE INVENTION:
TRIAL IMPLANT
2. APPLICANT:
Meril Corporation (I) Private Limited, an Indian company of the address Survey No. 135/139, Muktanand Marg, Bilakhia House, Pardi, Vapi, Valsad-396191 Gujarat, India.




The following specification particularly describes the invention and the manner in which it is to be performed:

 

FIELD OF INVENTION
[0001] The present disclosure relates to a bio-medical implant. More particularly, the present invention relates to a trial implant for shoulder arthroplasty.
BACKGROUND OF INVENTION
[0002] The glenohumeral joint (commonly known as the shoulder joint) is a ball-and-socket joint that connects the upper arm bone (humerus) to the shoulder blade (scapula). A portion of the upper arm bone behaves as a ball within a socket provided by the shoulder blade. The shoulder joint allows the user to enjoy a high degree of mobility of the arm to perform various day to day activities. However, with age the glenohumeral joint is susceptible to various medical conditions such as acute proximal humerus fractures, post-traumatic glenohumeral osteoarthritis, and chronic irreducible shoulder dislocation. These conditions can lead to complications including joint stiffness, reduced range of motion, and pain during movement, all of which can significantly impact a patient's quality of life.
[0003] A shoulder joint replacement procedure is the best way to restore stability and mobility of the diseased shoulder joint. Commonly, there are two types of shoulder replacement procedure, i.e., total shoulder replacement (TSR) and reverse shoulder replacement (RSR). In the TSR procedure the shoulder joint is replaced with an implant mimicking the healthy anatomy of a ball-and-socket-joint. In the RSR procedure, as the name suggest, the shoulder joint implant is anatomically reversed. In other words, a metal ball-like implant is provided in the socket of the shoulder blade. And complementing the metal ball-like implant, a plastic socket is provided at an upper end of the upper arm bone. The RSR procedure is preferred over TSR for individuals with cuff tear arthropathy, as it utilizes different muscles to facilitate arm movement.
[0004] The implant (and components thereof) in the RSR procedure must be positioned at an appropriate offset to maximize the arm's range of motion and joint functionality. The appropriate offset depends on the anatomy of the native shoulder joint that is unique to each patient. Traditionally, the surgeons rely on trial implants or the like to determine the appropriate offset basis which the final implant is selected for implantation.
[0005] Conventionally, each potential offset of the implant being tested by the surgeon, requires a separate trial implant. Thus, to check for a pre-defined offset, the surgeon has to deploy a trial implant corresponding to the pre-defined offset, test it for the range of motion of the arm and then remove the trial implant. The afore-mentioned steps are repeated until a trial implant is found with the appropriate offset that gives the maximum range of motion and joint functionality to the patient's arm. This trial-and-error process of selecting the trial implant with the appropriate offset can be time-consuming, and cumbersome to the surgeon thereby, prolonging the duration of the surgery and adding complexity to the procedure.
[0006] Therefore, there arises a need for a trial implant that overcomes the drawbacks associated with the conventional trial implants.
SUMMARY OF INVENTION
[0007] Particular embodiments of the present disclosure are described herein below with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are mere examples of the disclosure, which may be embodied in various forms. Well-known functions or constructions are not described in detail to avoid obscuring the present disclosure in unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present disclosure in virtually any appropriately detailed structure.
[0008] The present disclosure relates to a trial implant including a proximal end, a distal end, a socket member disposed at the proximal end, and a base member disposed at the distal end. The socket member includes a groove. The base member is operationally coupled to the socket member. The base member includes a projection disposed movably at least partially within the groove of the socket member. The socket member and the base member attains an appropriate offset from a plurality of pre-configured offsets defined by the trial implant.
BRIEF DESCRIPTION OF DRAWINGS
[0009] The summary above, as well as the following detailed description of illustrative embodiments, is better understood when read in conjunction with the apportioned drawings. For the purpose of illustrating the present disclosure, exemplary constructions of the disclosure are shown in the drawings. However, the disclosure is not limited to specific methods and instrumentality disclosed herein. Moreover, those in the art will understand that the drawings are not to scale.
[00010] Fig. 1 depicts an assembled view of a trial implant 100, in accordance with an embodiment of the present disclosure.
[00011] Fig. 1a depicts a cross-sectional view of the trial implant 100, in accordance with an embodiment of the present disclosure.
[00012] Fig. 1b depicts an exploded view of the trial implant 100, in accordance with an embodiment of the present disclosure.
[00013] Fig. 2 depicts a socket member 110 of the trial implant 100, in accordance with an embodiment of the present disclosure.
[00014] Fig. 2a depicts an enlarged portion of the socket member 110 of the trial implant 100, in accordance with an embodiment of the present disclosure.
[00015] Fig. 2b depicts an elongate member 117 of the trial implant 100, in accordance with an embodiment of the present disclosure.
[00016] Fig. 3 depicts a base member 130 of the trial implant 100, in accordance with an embodiment of the present disclosure.
[00017] Fig. 3a depicts a channel 133 of the trial implant 100, in accordance with an embodiment of the present disclosure.
[00018] Fig. 4 depicts a resilient member 150 of the trial implant 100, in accordance with an embodiment of the present disclosure.
[00019] Figs. 5a-5c depicts three different offsets of the trial implant 100, in accordance with an embodiment of the present disclosure.
DETAILED DESCRIPTION OF ACCOMPANYING DRAWINGS
[00020] Prior to describing the invention in detail, definitions of certain words or phrases used throughout this patent document will be defined: the terms "include" and "comprise", as well as derivatives thereof, mean inclusion without limitation; the term "or" is inclusive, meaning and/or; the phrases "coupled with" and "associated therewith", as well as derivatives thereof, may mean to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, juxtapose, be proximate to, be bound to or with, have a property of, or the like. Definitions of certain words and phrases are provided throughout this patent document, and those of ordinary skill in the art will understand that such definitions apply in many, if not most, instances to prior as well as future uses of such defined words and phrases.
[00021] Reference throughout this specification to "one embodiment," "an embodiment," or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in one embodiment," "in an embodiment," and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to" unless expressly specified otherwise. An enumerated listing of items does not imply that any or all of the items are mutually exclusive and/or mutually inclusive, unless expressly specified otherwise. The terms "a," "an," and "the" also refer to "one or more" unless expressly specified otherwise.
[00022] Although the operations of exemplary embodiments of the disclosed method may be described in a particular, sequential order for convenient presentation, it should be understood that the disclosed embodiments can encompass an order of operations other than the particular, sequential order disclosed. For example, operations described sequentially may in some cases be rearranged or performed concurrently. Further, descriptions and disclosures provided in association with one particular embodiment are not limited to that embodiment, and may be applied to any embodiment disclosed herein. Moreover, for the sake of simplicity, the attached figures may not show the various ways in which the disclosed system, method, and apparatus can be used in combination with other systems, methods, and apparatuses.
[00023] Furthermore, the described features, advantages, and characteristics of the embodiments may be combined in any suitable manner. One skilled in the relevant art will recognize that the embodiments may be practiced without one or more of the specific features or advantages of a particular embodiment. In other instances, additional features and advantages may be recognized in certain embodiments that may not be present in all embodiments. These features and advantages of the embodiments will become more fully apparent from the following description and apportioned claims, or may be learned by the practice of embodiments as set forth hereinafter.
[00024] The present disclosure discloses a trial implant. The trial implant allows the user to deliberately set and maintain an offset between a socket member and a base member from among a plurality of pre-configured offsets defined by the trial implant. This allows the user to quickly determine the appropriate offset to be used for selecting a final implant without reimplanting the trial implant multiple times. The trial implant, thus, saves surgical time and reduces the risk and extent of complications arising thereof.
[00025] The trial implant includes a socket member, a base member operationally coupled to the socket member, and a resilient member disposed between the socket member and the base member. The resilient member is configured to maintain an offset between the socket member and the base member from among a plurality of pre-configured offsets defined by the trial implant. The offset may be defined as a change in distance between the socket member and the base member.
[00026] The socket member is provided with at least two pair of outer openings and inner openings. The at least two pair of the outer openings and the inner openings are provided with an elongate member each. Corresponding to the pairs of the outer openings and the inner openings, the base member is provided with channels. The channels allow the elongate members to extend from the outer opening to the inner opening through the channel of the base member. Upon deliberate user-intervention, the elongate members are configured to travel along a pre-defined stepped pathway defined by the channels thereby, allowing the socket member to either move away or move towards the base member and set the offset between the socket member and the base member from among the plurality of pre-configured offsets defined by the trial implant. In other words, the elongate members along with the channels help the user to toggle the trial implant between the plurality of pre-configured offsets defined by the trial implant.
[00027] Now referring to the figures, Fig. 1 illustrates a trial implant 100 (interchangeably referred to as an implant 100 hereafter). Fig. 1a depicts a cross-sectional view and Fig. 1b depicts an exploded view of the implant 100. The implant 100 is used, for example, to determine an appropriate offset for replacing a diseased shoulder joint during a reverse shoulder replacement (RSR) procedure. In this procedure, the natural glenoid cavity of the diseased shoulder joint is replaced with a prosthetic glenoid ball (not shown), while the corresponding humeral head is substituted with a prosthetic socket (not shown).
[00028] To select the prosthetic socket with the appropriate offset, the implant 100 of the present disclosure is used. The implant 100 defines a proximal end 100a and a distal end 100b. The implant 100 includes a socket member 110, a base member 130 operationally coupled to the socket member 110, and a resilient member 150 disposed between the socket member 110 and the base member 130. The resilient member 150 is configured to maintain an offset between the socket member 110 and the base member 130 from among a plurality of pre-configured offsets defined by the implant 100. The offset may be defined as a change in distance between the socket member 110 and the base member 130.
[00029] The socket member 110 is disposed at the proximal end 100a of the implant 100. The socket member 110 has a pre-defined shape including but not limited to, cylindrical, oval, tubular, etc. In an exemplary embodiment, as shown in Figs. 1a and 1b, the socket member 110 is substantially cylindrical. The socket member 110 may be made of one or more materials including, but not limited to, Ultra-high-molecular-weight polyethylene (UHMWPE), poly(methyl methacrylate) (PMMA), Highly cross-linked polyethylene (HXLPE) having vitamin E, etc. In an exemplary embodiment, the socket member 110 is made of UHMWPE. The socket member 110 may have a pre-defined diameter ranging from 5 mm to 70 mm. In an exemplary embodiment, the diameter of the socket member 110 is 40 mm. Corresponding to the proximal end 100a and the distal end 100b of the implant 100, the socket member 110 defines a proximal end 110a and a distal end 110b (as shown in Fig. 2).
[00030] The height of the socket member 110 ranges from 20 mm to 50 mm. The height of the socket member 110 may either be uniform or non-uniform. In an exemplary embodiment, as shown in Fig. 1a, the height of the socket member 110 is uniform. In another exemplary embodiment, as shown in Fig. 1, the height of the socket member 110 is non-uniform as the proximal end 110a of the socket member 110 is inclined at a pre-defined angle. The pre-defined angle varies depending upon the variations observed in the anatomy of a pre-defined population (for example, specific to a population of a particular geographical region).
[00031] At the proximal end 110a, the socket member 110 defines a cavity 111 that is configured to at least partially receive the prosthetic glenoid ball. Accordingly, the shape and size of the cavity 111 corresponds to that of the prosthetic glenoid ball. The cavity 111 allows the prosthetic glenoid ball to rotate within corresponding to the motion of the arm of a patient.
[00032] At the distal end 110b, the socket member 110 defines a circular groove (or groove) 113 configured to at least partially receive a portion of the base member 130. The groove 113 may either be continuous or discontinuous. In an exemplary embodiment, the groove 113 is continuous. The groove 113 may be at a pre-defined distance away from a periphery (defined by an outer circumferential surface) of the socket member 110. The pre-defined distance ranges from 0.5 mm to 20 mm. In an exemplary embodiment, the groove 113 is 8 mm away from the periphery of the socket member 110. The groove 113 may have a depth ranging from 0.5 mm to 10 mm. The groove 113 may have a width ranging from 0.5 mm to 8 mm. In an exemplary embodiment, the depth and width of the groove 113 is 8 mm and 5 mm, respectively.
[00033] At least one flange 113a is disposed at least partially within the groove 113. The flange 113a may extend either towards or away from the periphery of the socket member 110. In an exemplary embodiment, as shown in Fig. 2, the groove 113 is provided with one flange 113a extending towards the periphery of the socket member 110. The flange 113a may have a width ranging from 0.5 mm to 8 mm. In an exemplary embodiment, the width of the flange 113a is 5 mm. The flange 113a is configured to at least partially abut the resilient member 150.
[00034] The socket member 110 is provided with at least two pair of outer openings 115a and inner openings 115b. One pair includes one outer opening 115a co-aligned with a respective inner openings 115b. The outer opening 115a is disposed on an outer surface of the socket member 110. The inner opening 115b is disposed proximal to the flange 113a (as shown in Fig. 2a). The outer openings 115a and the inner openings 115b may each have a pre-defined shape including, but not limited to circular, oval, tubular, etc. In an exemplary embodiment, the outer openings 115a and the inner openings 115b are circular. The outer openings 115a and the inner openings 115b may each have a pre-defined diameter ranging from 0.5 mm to 10 mm. In an exemplary embodiment, the outer openings 115a and the inner openings 115b has the same diameter of 7 mm.
[00035] The pairs of the outer openings 115a and the inner openings 115b may be evenly distributed around the socket member 110. Alternatively, the pairs of the outer openings 115a and the inner openings 115b are unevenly distributed around the socket member 110. In an exemplary embodiment, the socket member 110 is provided with four pairs of the outer openings 115a and the inner openings 115b distributed evenly around the socket member 110.
[00036] At least one of the outer openings 115a and the inner openings 115b are provided with a plurality of internal threads. In an exemplary embodiment, the outer openings 115a is provided with a plurality of internal threads.
[00037] At least two pair of the outer openings 115a and the inner openings 115b are provided with an elongate member 117 each. The elongate member 117 extends across the groove 113 from the outer opening 115a to the inner opening 115b. The elongate member 117 may have a diameter corresponding to the diameter of the outer openings 115a and the inner openings 115b. The elongate member 117 may be made of one or more materials including, but not limited to, titanium, cobalt chromium, and stainless steel 316 (SS316), etc. In an exemplary embodiment, the elongate member 117 is made of titanium. The elongate members 117 operationally interact with the at least a portion of the base member 130 to maintain the offset between the socket member 110 and the base member 130 from among a plurality of pre-configured offsets defined by the implant 100.
[00038] As shown in Fig. 2b, the elongate member 117 defines an outer end 117a and an inner end 117b. The outer end 117a is disposed within the outer opening 115a and the inner end 117b is disposed within the inner opening 115b.
[00039] Corresponding to the plurality of internal threads provided within at least one of the outer opening 115a and the inner opening 115b, at least one of the outer end 117a and the inner end 117b is provided with a plurality of external threads. The plurality of external threads and the plurality of internal threads helps the elongate member 117 to be coupled with the socket member 110. In an exemplary embodiment, the outer end 117a of the elongate member 117 is provided with the plurality of external threads. Although the coupling between the socket member 110 and the elongate member 117 is described with the examples of the plurality of threads, other functionally equivalent techniques to couple the elongate member 117 to the socket member 110 are within the scope of the teachings of the present disclosure.
[00040] Fig. 3 depicts the base member 130 of the implant 100. The base member 130 is disposed at the distal end 100b of the implant 100. The base member 130 has a pre-defined shape including but not limited to, disc-shaped, tubular, etc. In an exemplary embodiment, as shown in Figs. 1a and 1b, the base member 130 is disc-shaped. The base member 130 may be made of one or more materials including, but not limited to titanium, cobalt chromium, and stainless steel 316 (SS316), etc. In an embodiment, the base member 130 is made of titanium. The base member 130 may have a pre-defined diameter ranging from 0.5 mm to 70 mm. The base member 130 may have a pre-defined thickness ranging from 5 mm to 10 mm. In an exemplary embodiment, the diameter and the thickness of the base member 130 is 10 mm and 4 mm, respectively. Corresponding to the proximal end 100a and the distal end 100b of the implant 100, the base member 130 defines a proximal end 130a and a distal end 130b (as shown in Fig. 3). The base member 130 helps the implant 100 to be coupled to the anatomical structure of the shoulder.
[00041] Towards the proximal end 130a, the base member 130 is provided with a circular projection (or projection) 131 corresponding to the groove 113 of the socket member 110. Corresponding to the groove 113, the projection 131 may either be continuous or discontinuous. The height of the projection 131 may either be same as or more than the depth of the groove 113. The projection 131 is configured to be movably disposed at least partially within the groove 113 of the socket member 110, thereby allowing the base member 130 to be operationally coupled to the socket member 110.
[00042] Corresponding to the at least two pairs of the outer openings 115a and the inner openings 115b, the projection 131 of the base member 130 is provided with at least two channels 133. In an exemplary embodiment, the projection 131 is provided with four evenly spaced channels 133 corresponding to four pairs of the outer openings 115a and the inner openings 115b. The channels 133 define a pre-defined stepped pathway. The channels 133 allow the elongate members 117 to extend from the outer opening 115a to the inner opening 115b through the channel 133 of the base member 130. Upon deliberate user-intervention, the elongate members 117 are configured to travel along the pre-defined stepped pathway defined by the channels 133 thereby, allowing the socket member 110 to either move away or move towards the base member 130 and set the offset between the socket member 110 and the base member 130 from among the plurality of pre-configured offsets defined by the implant 100. In other words, the elongate members 117 along with the channels 133 helps the user to toggle the implant 100 between the plurality of pre-configured offsets defined by the implant 100 such that an appropriate offset is attained by the socket member 110 and the base member 130 based on the patient's anatomy.
[00043] Fig. 3a depicts the channel 133 of the base member 130. Depending upon the number of pre-configured offsets of the implant 100, each of the channels 133 is provided with a plurality of longitudinal bars 133a. Two adjacently disposed longitudinal bars 133a are fluidically coupled to each other via at least one horizontal bar 133b. The length of the longitudinal bars 133a progressively increases from one end to the other end. The length of the longitudinal bars 133a and the horizontal bars 133b may either be same or different. The width of the longitudinal bars 133a and the horizontal bars 133b correspond to the diameter of the elongate member 117. The longitudinal bars 133a and the horizontal bars 133b may have at least one of a straight profile, curved profile, wavy profile, etc. In an exemplary embodiment, the longitudinal bars 133a and the horizontal bars 133b has a straight profile. Each longitudinal bar 133a defines a resting portion 133c disposed towards the proximal end 130a of the base member 130. The horizontal bars 133b are disposed distal to the resting portions 133c of the two adjacent longitudinal bars 133a coupled by the said horizontal bar 133b. The resting portions 133c of the longitudinal bars 133a are configured to hold the elongate member 117 thereby, maintaining the implant 100 at the offset corresponding to the longitudinal bar 133a. To toggle the implant 100 from one offset to another offset, the elongate member 117 is moved from one resting portion 133c of a longitudinal bar 133a to the resting portion 133c of another longitudinal bar 133a via the horizontal bar 133b. The movement of the elongate member 117 with respect to the channel 133 is mimicked by socket member 110 with respect to the base member 130.
[00044] In an exemplary embodiment, as shown in Fig. 3a, the channel 133 includes three longitudinal bars 133a, namely, a first longitudinal bar 133a1 (having a first resting portion 133c1), a second longitudinal bar 133a2 (having a second resting portion 133c2), and a third longitudinal bar 133a3 (having a third resting portion 133c3). The first longitudinal bar 133a1 is fluidically coupled to the second longitudinal bar 133a2 via a first horizontal bar 133b1. The second longitudinal bar 133a2 is fluidically coupled to the third longitudinal bar 133a3 via a second horizontal bar 133b2. The first longitudinal bar 133a1 corresponds to the offset of 0 mm. The second longitudinal bar 133a2 corresponds to the offset of +2 mm. The third longitudinal bar 133a3 corresponds to the offset of +4 mm. Accordingly, when the elongate member 117 is disposed across the first resting portion 133c1, the implant 100 is said to be maintained at the offset of 0 mm (as shown in Fig. 5a). When the elongate member 117 is disposed across the second resting portion 133c2, the implant 100 is said to be maintained at the offset of +2 mm (as shown in Fig. 5b). And, when the elongate member 117 is disposed across the third resting portion 133c3, the implant 100 is said to be maintained at the offset of +4 mm (as shown in Fig. 5c).
[00045] In the embodiment of the channel 133 depicted in Fig. 3a, to increase the offset of the implant 100 from, say 0 mm to +2 mm; the elongate member 117 is moved from the first resting portion 133c1 of the first longitudinal bar 133a1 to the second resting portion 133c2 of the second longitudinal bar 133a2 via the first horizontal bar 133b1. And, to decrease the offset of the implant 100 from, say +4 mm to +2 mm; the elongate member 117 is moved from the third resting portion 133c3 of the third longitudinal bar 133a3 to the second resting portion 133c2 of the second longitudinal bar 133a2 via the second horizontal bar 133b2. The exemplary teachings described in these embodiments to increase and decrease the offset of the implant 100 can be applied for each of the offset defined by each of the longitudinal bars 133a mutatis mutandis.
[00046] Towards the distal end 130b, the base member 130 includes at least one peg 135 (as shown in Figs. 1, 1a, 1b, 3). In an exemplary embodiment, the base member 130 is provided with one peg 135 disposed at a centre of the base member 130. The peg 135 extends from an outer surface of the base member 130 towards the distal end 100b of the implant 100. In an exemplary embodiment, the peg 135 is cylindrical in shape. The peg 135 may have a pre-defined diameter ranging from 0.5 mm to 10 mm. The peg 135 may have a pre-defined height ranging from 0.5 mm to 15 mm. In an exemplary embodiment, the diameter and height of the peg 135 is 7 mm and 10 mm, respectively. The peg 135 helps the implant 100 to be coupled to the anatomical structure of the shoulder. In an exemplary embodiment, the shoulder (or a portion thereof) is provided with a cavity configured to receive the peg 135 of the implant 100 thereby, coupling the implant 100 to the shoulder. Although the implant 100 of the present disclosure is described with the example of the peg 135, other functionally equivalent structures to couple the implant 100 to the shoulder (or portions thereof) is within the scope of the teachings of the present disclosure.
[00047] The resilient member 150 is disposed between the socket member 110 and the base member 130. In an exemplary embodiment, the resilient member 150 is disposed at least partially within the projection 131 of the base member 130 and at least partially within the groove 113 of the socket member 110. The resilient member 150 may be made of one or more materials including, but not limited to, titanium, cobalt chromium, and stainless steel 316 (SS316), etc. In an exemplary embodiment, the resilient member 150 is made of titanium. In an exemplary embodiment, the cross-sectional profile of the resilient member 150 is substantially circular. The resilient member 150 may have a pre-defined diameter ranging from 0.5 mm to 70 mm. In an exemplary embodiment, the diameter of the resilient member 150 is 40 mm. The resilient member 150 may have a pre-defined spring constant corresponding to standard springs used in orthopaedic instruments.
[00048] The resilient member 150 pushes the socket member 110 away from the base member 130 thereby, maintaining the elongate members 117 at the resting portions 133c of the corresponding longitudinal bars 133a when there is no external force applied on the socket member 110 (and the implant 100). Thus, the resilient member 150 prevents the elongate member 117 to autonomously move between adjacent longitudinal bars 133a via the horizontal bars 133b. Accordingly, to toggle the offset of the implant 100, the user has to deliberately push the socket member 110 towards the base member 130 thereby, moving the elongate member 117 away from a resting portion 133c of a longitudinal bar 133a and allowing the user to rotate the socket member 110 to move the elongate member 117 between two adjacently disposed longitudinal bars 133a via a corresponding horizontal bar 133b.
[00049] Corresponding to the proximal end 100a and distal end 100b of the implant 100, the resilient member 150 defines a proximal end 150a and a distal end 150b (as shown in Fig. 4). The proximal end 150a at least partially abuts the flange 113a and is disposed within the groove 113 of the socket member 110.The distal end 150b of the resilient member 150 at least partially abuts an inner surface of the base member 130.
[00050] Additionally or optionally, at least one of the proximal end 150a and the distal end 150b of the resilient member 150 is at least partially flat for better abutment of resilient member 150 with the socket member 110 and the base member 130 respectively.
[00051] The scope of the invention is only limited by the appended patent claims. More generally, those skilled in the art will readily appreciate that all parameters, dimensions, materials, and configurations described herein are meant to be exemplary and that the actual parameters, dimensions, materials, and/or configurations will depend upon the specific application or applications for which the teachings of the present invention is/are used. , Claims:We Claim,
1. A trial implant (100) comprising:
a. a proximal end (100a) and a distal end (100b);
b. a socket member (110) disposed at the proximal end (100a), defining a groove (113); and
c. a base member (130) disposed at the distal end (100b) and operationally coupled to the socket member (110), including a projection (131) movably disposed at least partially within the groove (113) of the socket member (110);
wherein, the socket member (110) and the base member (130) attains an appropriate offset from a plurality of pre-configured offsets defined by a trial implant (100).
2. The trial implant (100) as claimed in claim 1, wherein the trial implant (100) includes a resilient member (150) disposed between the socket member (110) and the base member (130), configured to maintain the offset between the socket member (110) and the base member (130) from the plurality of pre-configured offsets defined by the trial implant (100).
3. The trial implant (100) as claimed in claim 1, wherein the socket member (110) defines a cavity (111) disposed at the proximal end (100a) configured to at least partially receive the prosthetic glenoid ball.
4. The trial implant (100) as claimed in claim 1, wherein the groove (113) includes at least one flange (113a) disposed at least partially therein and configured to at least partially abut a resilient member (150).
5. The trial implant (100) as claimed in claim 1, wherein the socket member (110) is provided with at least two pair of outer openings (115a) co-aligned with respective inner openings (115b), the outer opening (115a) disposed on an outer surface of the socket member (110), and the inner opening (115b) disposed proximal to a flange (113a).
6. The trial implant (100) as claimed in claim 1, wherein the socket member (110) is provided with at least two pair of outer openings (115a) co-aligned with respective inner openings (115b), the at least two pair of the outer openings (115a) and the inner openings (115b) being provided with an elongate member (117) each.
7. The trial implant (100) as claimed in claim 6, wherein the elongate members (117) operationally interact with the at least a portion of the base member (130) to maintain the offset between the socket member (110) and the base member (130) from among the plurality of pre-configured offsets defined by the trial implant (100).
8. The trial implant (100) as claimed in claim 1, wherein the base member (130) includes at least one peg (135) disposed at the distal end (100b).
9. The trial implant (100) as claimed in claim 1, wherein the height of the projection (131) is either same as or more than the depth of the groove (113).
10. The trial implant (100) as claimed in claim 1, wherein the projection (131) of the base member (130) is provided with at least two channels (133), each channel (133) corresponds to a respective outer opening (115a) and inner opening (115b) of the socket member (110).
11. The trial implant (100) as claimed in claim 1, wherein the projection (131) of the base member (130) is provided with at least two channels (133) defining a pre-defined stepped pathway.
12. The trial implant (100) as claimed in claim 11, wherein each of the channels (133) include a plurality of longitudinal bars (133a), and two adjacently disposed longitudinal bars (133a) are fluidically coupled to each other via at least one horizontal bar (133b).
13. The trial implant (100) as claimed in claim 11, wherein each of the channels (133) include a plurality of longitudinal bars (133a), and the length of the longitudinal bars (133a) progressively increases from one end to the other end.
14. The trial implant (100) as claimed in claim 11, wherein each of the channels (133) include a plurality of longitudinal bars (133a), and each longitudinal bar (133a) defines a resting portion (133c) disposed towards a proximal end (130a) of the base member (130).
15. The trial implant (100) as claimed in claim 12, wherein the horizontal bars (133b) are disposed distal to a resting portion (133c) of the two adjacent longitudinal bars (133a) coupled by the said horizontal bar (133b).

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