2024 Mobi c

Dr. Louis Radden is offering an alternative to neck fusion surgery, and is one of a few surgeons in Michigan to perform this breakthrough procedure. Mobi-C Cervical Disc was FDA approved for use in the United States in 2013 and to date has been used worldwide in over 40,000 procedures with superb results. It is also the first cervical disc .... 173971 engineering calculation methods for turbulent flow peter bradshaw download epub

The Mobi-C has three parts: two metal plates and a medical grade polyethylene insert in the middle. The top plate rotates over the domed insert. The insert slides across the bottom plate, left-to-right and front-to-back up to 1mm in any direction. The insert also twists over the bottom plate. The two tabs on the bottom plate provide a safety ... What is Mobi-C. Mobi-C is the first cervical disc in the U.S. approved to treat more than one level of the cervical spine. It received FDA approval for one and two-level indications in August 2013. Mobi-C demonstrated statistical superiority compared to cervical spine fusion in overall study success when used in two-level patients at 5 years. Mobi-C implant surgery is a safe alternative to ACDF surgery in cervical disc degeneration. Cite this article: Bone Joint J 2016;98-B:829-3. Effectiveness and safety of Mobi-C for treatment of single-level cervical disc spondylosis: a randomised control trial with a minimum of five years of follow-upMay 01, 2019. SAN DIEGO — Improvements were sustained at 10 years for patients treated with the Mobi-C cervical disc in the trial that led to its approval by the US Food and Drug Administration ...The Mobi-C® Cervical Disc Prosthesis (Mobi-C®) is a single use device for cervical intervertebral disc replacement at one level from C3 to C7 in order to maintain/restore segmental motion and disc height. The components of the Mobi-C® include a cobalt, chromium, molybdenum Results: There was no statistical significance in the difference of overall flexion range between M6-C and Mobi-C prostheses. However, overall range of extension of Mobi-C was greater compared to M6-C (P = 0.028). At C 5-6, the range of flexion for both implants were similar but lesser compared to asymptomatic patients (P < 0.001). Range of ... Nov 28, 2017 · Ethical standards: The Mobi-C Clinical Trial (ClinicalTrials.gov registration number: NCT00389597) was conducted at 24 sites in the US and was approved by the Institutional Review Board, Research Ethics Committee, or local equivalent of each participating site. Level of evidence: 1. Objective: Mobi-C cervical disc arthroplasty (MCDA) is an alternative to anterior cervical discectomy and fusion (ACDF). This study evaluated the effectiveness and safety of MCDA and ACDF for symptomatic cervical degenerative disc disease. Page 1 of 7 Last Updated 01-DECEMBER-2022 . Zimmer Biomet Patent Marking . This information is provided as notice of patented articles pursuant to 35 U.S.C. § 287(a).Dec 8, 2017 · The Mobi-C cervical artificial disc (LDR Medical; Troyes, France) is a semiconstrained, mobile bearing, bone-sparing TDR consisting of 2 cobalt–chromium–molybdenum alloy endplates and an ultra-high-molecular-weight polyethylene mobile insert facilitating 5 independent degrees of freedom. • A single Mobi-C prosthesis costs £1,750 (excluding VAT). Two Mobi-C devices are needed for 2-level cervical disc replacement. • A US cost-effectiveness analysis found that the average cost per patient in the 5 years after surgery was $23,459 (about £16,515) for Mobi-C, and $21,772 (about £16,031) for ACDF.Zimmer Biomet Spine has announced that more than 150,000 Mobi-C Cervical Discs have been implanted worldwide. Zimmer Biomet holds a commanding position in the $200 million global cervical disc market, according to the company. The Mobi-C device represents an optimal solution with statistical superiority to two-level fusion at seven years.As a potential candidate for cervical disc replacement, ZimVie offers the Mobi-C Reimbursement Services Program. This service is intended to help establish coverage with commercial insurers who are not currently covering Mobi-C for one or two levels. Contact the ZimVie Mobi-C reimbursement hotline 877-331-0062 and [email protected] for assistance.The Mobi-C Two-Level Study 5-Year Results This is a prospective, randomized, FDA supervised IDE study which is designed for a 7-year follow-up. At the 2-year and 5-year marks, Mobi-C demonstrated fewer subsequent surgeries, lower rates of adverse events, lower rates of adjacent level degeneration, and higher NDI (neck disability index) success ...Nov 15, 2021 · The Mobi-C device was thought by the plaintiff to be flawed since it differed from the device that the Food and Drug Administration had approved, which affect the “safety and efficacy of the ... An infection at the surgery site, such as a skin rash or infected cut. A known allergy to what Mobi-C is made of: cobalt, chromium, molybdenum, titanium, hydroxyapatite, polyethylene, and other trace elements. Talk to your doctor if you have a metal allergy. Damaged cervical vertebrae from an accident (trauma) at one of the surgery levels.Product Usage: The device is intended as a cervical intervertebral disc replacement at one or two contiguous levels from C3 to C7 designed to maintain/restore segmental motion and disc height. MOBI-C distraction pins are inserted into the vertebral body below and above the disc that is to have the disc replacement.This is a surgical video of a cervical disc replacement with the Zimmer Biomet Mobi-C TDR for treatment of a large C5-6 extruded disc herniation resulting in...Apr 13, 2020 · Zimmer Biomet Spine has announced that over 150,000 Mobi-C Cervical Discs have been implanted worldwide. The implant, a cobalt chromium alloy and polyethylene mobile-bearing prosthesis, was first implanted in France in 2004 and was approved for sale in the U.S. by the FDA in 2013. Noting the bulwark of data on the device, James Cloar, President ... Product Usage: The device is intended as a cervical intervertebral disc replacement at one or two contiguous levels from C3 to C7 designed to maintain/restore segmental motion and disc height. MOBI-C distraction pins are inserted into the vertebral body below and above the disc that is to have the disc replacement.Jul 31, 2020 · The replacement Mobi-C device has not failed to date, unlike the first Mobi-C device, which failed 1 week postoperatively in this same patient. This result likely rules out patient factors as the underlying cause of failure and may speak to the increased need to have a very precise surgical technique to prevent anterior slippage of the endplate ... Sep 27, 2019 · Mobi-C group composed of 15 subjects, in which 6 were male and 9 were female. There were no statistical differences in demographics and baseline characteristics of subjects between the M6-C and Mobi-C groups, including age, gender, BMI, smoking history, the type of surgery, ROM and FSU height ( Table 7 ). An infection at the surgery site, such as a skin rash or infected cut. A known allergy to what Mobi-C is made of: cobalt, chromium, molybdenum, titanium, hydroxyapatite, polyethylene, and other trace elements. Talk to your doctor if you have a metal allergy. Damaged cervical vertebrae from an accident (trauma) at one of the surgery levels. An infection at the surgery site, such as a skin rash or infected cut. A known allergy to what Mobi-C is made of: cobalt, chromium, molybdenum, titanium, hydroxyapatite, polyethylene, and other trace elements. Talk to your doctor if you have a metal allergy. Damaged cervical vertebrae from an accident (trauma) at one of the surgery levels. However, Mobi-C disc replacement is very different in a number of ways. The purpose of the replacement surgery is obviously to replace the damaged disc and help with neck pain, arm pain, and arm tingling, for instance. However, the device is designed to promote neck movement (including turning left-to-ride, bending side-to-side, and bending ...Zimmer Biomet Spine has announced that over 150,000 Mobi-C Cervical Discs have been implanted worldwide. The implant, a cobalt chromium alloy and polyethylene mobile-bearing prosthesis, was first implanted in France in 2004 and was approved for sale in the U.S. by the FDA in 2013. Noting the bulwark of data on the device, James Cloar, President ...Page 1 of 7 Last Updated 01-DECEMBER-2022 . Zimmer Biomet Patent Marking . This information is provided as notice of patented articles pursuant to 35 U.S.C. § 287(a).Objective: Mobi-C cervical disc arthroplasty (MCDA) is an alternative to anterior cervical discectomy and fusion (ACDF). This study evaluated the effectiveness and safety of MCDA and ACDF for symptomatic cervical degenerative disc disease. The following conclusions can be drawn from the present study review: 1) one-level Mobi-C CDA is non-inferior, but not superior, to one-level ACDF for patients with cervical DDD; 2) the Mobi-C CDA procedure is associated with high rates of HO; and 3) two-level Mobi-C CDA may be superior to two-level ACDF, but substantial evidence is lacking ...LDR Spine –Mobi-C® P110009 Page 3 of 82 The Mobi-C® endplates are available in seven footprint sizes to address individual patient anatomy and maximize endplate coverage. These sizes are illustrated in the table below. Table 1. Mobi-C® Device Configurations Depth x Width (mm) Inferior/Superior Plate & Mobile Insert Sizes Combinations ...The Mobi-C Cervical Disc has been designed for cervical disc replacement to restore segmental motion and disc height. TrellOss ®- C Porous Ti Interbody System TrellOss-C is an additively manufactured spacer for implantation up to two levels in the cervical spine.The Mobi-C is composed of three parts—two metal plates that sandwich a plastic insert. While other artificial discs require neurosurgeons to chisel bone and drill screws to hold the device in place, the Mobi-C has teeth on the top and bottom to secure the plates to the vertebrae on either side. Mobi-C implant surgery is a safe alternative to ACDF surgery in cervical disc degeneration. Cite this article: Bone Joint J 2016;98-B:829-3. Effectiveness and safety of Mobi-C for treatment of single-level cervical disc spondylosis: a randomised control trial with a minimum of five years of follow-upMobi-C is a safe and effective surgical option at one-level in the cervical spine from C3-C7 for indicated patients. The controlled mobility of the Mobi-C’s mobile insert, according to the company's website for Chinese surgeons, encourages restoration and respect of the instantaneous axis of rotation for a return to physiological mobility of ...The Healthy Neck. The neck (cervical spine) is made up of the bones (vertebrae), spinal cord, nerves, muscles, ligaments, and the system that carries blood (blood vessels). The top seven vertebrae make up the cervical spine and begin at the base of the skull. The vertebrae of the cervical spine protect the spinal cord and support the skull. Methods: This was a prospective study of patients treated with CDA at 1 or 2 contiguous levels using the Mobi-C® Cervical Disc (Zimmer Biomet). Following completion of the 7-yr Food and Drug Administration postapproval study, follow-up continued to 10 yr for consenting patients at 9 high-enrolling centers.Mobi-C provides bone sparing fixation without chisel cuts into the small vertebral bodies of the cervical spine, making it safe for implantation at two levels. About Mobi-C Disc Replacement Mobi-C Disc Replacement is performed under general anesthesia, usually as an outpatient procedure. The Mobi-C differs from some other contemporary disc designs in that it has a mobile polyethylene insert that is sandwiched between superior and inferior cobalt chromium endplates. While some studies claim the Mobi-C to have restored normal cervical spinal biomechanics, others have noted high levels of migration.Oct 27, 2016 · The Mobi-C Cervical Disc is now available to more than 200 million insured patients with one-level disc disease and more than 150 million patients with two-level disc disease across more than 90 commercial insurance plans. That makes Mobi-C the most widely covered intervertebral disc for cervical disc replacement in the industry. MOBI-C® prosthesis is a device for cervical intervertebral disc replacement (C3/C4, C4/C5, C5/C6, C6/C7) in order to restore segmental motion and disc height. Before any surgical procedure, read carefully the instructions and the surgical technique. Open the catalog to page 1. SURGICAL TECHNIQUE Pre-operative considerations Implant height ... Methods: This was a prospective study of patients treated with CDA at 1 or 2 contiguous levels using the Mobi-C® Cervical Disc (Zimmer Biomet). Following completion of the 7-yr Food and Drug Administration postapproval study, follow-up continued to 10 yr for consenting patients at 9 high-enrolling centers. Mobi-C’s foundation is the patented mobile core, which offers controlled mobility and encourages height restoration. The components of Mobi-C include superior and inferior Cobalt Chromium alloy endplates coated with plasma sprayed Titanium and hydroxyapatite coating, and a polyethylene mobile bearing insert.Apr 28, 2016 · Mobi-C® Cervical Disc is the first and only neck surgery prosthesis approved for reconstruction of the disc(s) from C3-C7 following discectomy at one or two ... The Mobi-C cervical disc is one of the most widely used cervical discs in the world. Mobi-C contains patented Mobile Core Technology™ that allows the polyeth...• A single Mobi-C prosthesis costs £1,750 (excluding VAT). Two Mobi-C devices are needed for 2-level cervical disc replacement. • A US cost-effectiveness analysis found that the average cost per patient in the 5 years after surgery was $23,459 (about £16,515) for Mobi-C, and $21,772 (about £16,031) for ACDF. Mobi-C provides bone sparing fixation without chisel cuts into the small vertebral bodies of the cervical spine, making it safe for implantation at two levels. About Mobi-C Disc Replacement Mobi-C Disc Replacement is performed under general anesthesia, usually as an outpatient procedure.The Mobi-C disc is one of the most common options for replacement cervical discs around the world. The medical device was first used in 2004 and has continued to be used successfully in patients with cervical disc issues (that is, disc issues in the neck). Without a doubt, many people who have undergone a Mobi-C disc procedure have had ...However, Mobi-C disc replacement is very different in a number of ways. The purpose of the replacement surgery is obviously to replace the damaged disc and help with neck pain, arm pain, and arm tingling, for instance. However, the device is designed to promote neck movement (including turning left-to-ride, bending side-to-side, and bending ...Mobi-C is the first cervical disc FDA approved for both one and two-level indications, and is used to help minimize pain and symptoms associated with bulging or diseased cervical discs. During an artificial disc replacement, the diseased disc will be replaced with the Mobi-C prosthetic disc to restore disc height and the distance between two ... Restoring natural motion to the cervical spine. The controlled mobility of the patented mobile core is the foundation of Mobi-C. With vertebrae and neck muscle movement, the Mobi-C implant is free to twist and slide left-to-right, and front-to-back, as well as rotate.The Mobi-C® Cervical Disc is indicated in skeletally mature patients for reconstruction of the disc from C3-C7 following discectomy at one level or two contiguous levels for intractable radiculopathy (arm pain and/or a neurological deficit) with or without neck pain,• A single Mobi-C prosthesis costs £1,750 (excluding VAT). Two Mobi-C devices are needed for 2-level cervical disc replacement. • A US cost-effectiveness analysis found that the average cost per patient in the 5 years after surgery was $23,459 (about £16,515) for Mobi-C, and $21,772 (about £16,031) for ACDF.It turns out that somewhere between 30% and 50% of patients who are candidates for a fusion are good candidates for a Mobi-C.” Study May Improve Insurance Coverage of the Mobi-C “In general, the Mobi-C is not more expensive than fusion surgery, but insurers have still been slow to embrace this new technology,” Dr. Hisey said.Mobi-C Had Lower Rates of Adjacent Segment Degeneration at 84 Months Mobi-C Had Fewer Subsequent Surgeries at 84 Months The ONE-LEVEL deterioration of adjacent segments at 84 months compared to baseline was: • 43.8% for Mobi-C compared to 63.0% for ACDF at the inferior level. • 40.4% for Mobi-C compared to 65.1% for ACDFThe Mobi-C® Cervical Disc Prosthesis (Mobi-C®) is a single use device for cervical intervertebral disc replacement at one level from C3 to C7 in order to maintain/restore segmental motion and disc height. The components of the Mobi-C® include a cobalt, chromium, molybdenum The Mobi-C has three parts: two metal plates and a medical grade polyethylene insert in the middle. The top plate rotates over the domed insert. The insert slides across the bottom plate, left-to-right and front-to-back up to 1mm in any direction. The insert also twists over the bottom plate. The two tabs on the bottom plate provide a safety ...Nov 17, 2016 · The Mobi-C Cervical Disc (Zimmer Biomet, Warsaw, IN—formerly LDR Spine, Austin, TX) is a cobalt chromium alloy and polyethylene mobile-bearing prosthesis that is indicated for reconstruction of the disc from C3-C7 following discectomy at one level or two contiguous levels for intractable radiculopathy in patients ages 21 to 67 years.² The Mobi-C® Cervical Disc Prosthesis (Mobi-C®) is a single use device for cervical intervertebral disc replacement at one level from C3 to C7 in order to maintain/restore segmental motion and disc height. The components of the Mobi-C® include a cobalt, chromium, molybdenum Zip. Institution. Map. Details. Email These Surgeons to Me. Zimmer Biomet is pleased to provide the Surgeon Locator to allow you to find surgeons who have been trained on Mobi-C. This locator may not be a complete list of trained surgeons in your area, and Zimmer Biomet does not make any recommendation or referral regarding the proper facility ...• A single Mobi-C prosthesis costs £1,750 (excluding VAT). Two Mobi-C devices are needed for 2-level cervical disc replacement. • A US cost-effectiveness analysis found that the average cost per patient in the 5 years after surgery was $23,459 (about £16,515) for Mobi-C, and $21,772 (about £16,031) for ACDF.The Mobi-C differs from some other contemporary disc designs in that it has a mobile polyethylene insert that is sandwiched between superior and inferior cobalt chromium endplates. While some studies claim the Mobi-C to have restored normal cervical spinal biomechanics, others have noted high levels of migration.Mar 28, 2018 · Mobi-C Cervical Disc Mobi-C is the first cervical disc prosthesis approved by the FDA for reconstruction of a cervical disc at both one and two levels (C3-C7). Mobi-C is a cobalt chromium alloy and polyethylene mobile-bearing prosthesis that is inserted in a single step, without requiring bone chiseling to accommodate vertebral anchorage such as screws or keels. The primary objective of this study was to rigorously compare the Mobi-C cervical artificial disc to ACDF for treatment of cervical DDD at 2 contiguous levels of the cervical spine. Methods: This study was a prospective, randomized, US FDA investigational device exemption pivotal trial of the Mobi-C cervical artificial disc conducted at 24 ...The Mobi-C Cervical Disc has been designed for cervical disc replacement to restore segmental motion and disc height. The components of Mobi-C include superior and inferior cobalt chromium molybdenum alloy endplates coated with plasma sprayed titanium and hydroxyapatite coating, and a polyethylene mobile bearing insert.The Mobi-C Cervical Disc has been designed for cervical disc replacement to restore segmental motion and disc height. The components of Mobi-C include superior and inferior cobalt chromium molybdenum alloy endplates coated with plasma sprayed titanium and hydroxyapatite coating, and a polyethylene mobile bearing insert.Figure 2. Degrees of Freedom of the Mobi-C® The inferior endplate includes two lateral stops that control and limit the translation and rotation of the mobile insert. The lateral stops also prevent the potential for migration of the mobile insert. Mobi-C® is designed to control the amount of translation by the mobile insert in the XThe Mobi-C Cervical Disc is implanted using an anterior approach. Patients should have failed at least 6 weeks of conservative treatment or demonstrated progressive signs or symptoms despite nonoperative treatment prior to implantation of the Mobi-C Cervical Disc. Physician CPT® Code CPT Description Insertion 22856 The Mobi-C Two-Level Study 5-Year Results This is a prospective, randomized, FDA supervised IDE study which is designed for a 7-year follow-up. At the 2-year and 5-year marks, Mobi-C demonstrated fewer subsequent surgeries, lower rates of adverse events, lower rates of adjacent level degeneration, and higher NDI (neck disability index) success ...Apr 3, 2023 · Mobi-C is a cobalt chromium alloy and polyethylene mobile-bearing prosthesis that is inserted in a single step, without requiring bone chiseling or other vertebral anchorage such as screws or keels. Results: There was no statistical significance in the difference of overall flexion range between M6-C and Mobi-C prostheses. However, overall range of extension of Mobi-C was greater compared to M6-C (P = 0.028). At C 5-6, the range of flexion for both implants were similar but lesser compared to asymptomatic patients (P < 0.001). Range of ...LDR Spine –Mobi-C® P110009 Page 3 of 82 The Mobi-C® endplates are available in seven footprint sizes to address individual patient anatomy and maximize endplate coverage. These sizes are illustrated in the table below. Table 1. Mobi-C® Device Configurations Depth x Width (mm) Inferior/Superior Plate & Mobile Insert Sizes Combinations ... In 2015, FDA approved an update to the Mobi-C labeling to include five year clinical results. Of note, Mobi-C demonstrated superiority at all time points to five years on overall trial success as compared to two-level ACDF. The Mobi-C consists of two cobalt chromium (CoCr) endplates that are plasma sprayed with titaniumOnly 1 study analyzed outcomes of 1-level versus 2-level Mobi-C CDA, and only 1 study analyzed 2-level Mobi-C CDA versus 2-level ACDF. In comparison with other cervical disc prostheses, the Mobi-C prosthesis is associated with higher rates of heterotopic ossification (HO). Studies with conflicts of interest reported lower rates of HO.Mobi-C Had Lower Rates of Adjacent Segment Degeneration at 84 Months Mobi-C Had Fewer Subsequent Surgeries at 84 Months The ONE-LEVEL deterioration of adjacent segments at 84 months compared to baseline was: • 43.8% for Mobi-C compared to 63.0% for ACDF at the inferior level. • 40.4% for Mobi-C compared to 65.1% for ACDF The primary objective of this study was to rigorously compare the Mobi-C cervical artificial disc to ACDF for treatment of cervical DDD at 2 contiguous levels of the cervical spine. Methods: This study was a prospective, randomized, US FDA investigational device exemption pivotal trial of the Mobi-C cervical artificial disc conducted at 24 ...Mar 23, 2016 · The Mobi-C cervical disc is one of the most widely used cervical discs in the world. Mobi-C contains patented Mobile Core Technology™ that allows the polyeth... Here, the authors present a series of 4 patients initially treated with Mobi-C artificial disc implants who developed postoperative neck pain. Dynamic imaging revealed segmental kyphosis at the level of the implant. All implants were locked in the flexion position, and all patients required reoperation. This is the first reported case series of ...Here, the authors present a series of 4 patients initially treated with Mobi-C artificial disc implants who developed postoperative neck pain. Dynamic imaging revealed segmental kyphosis at the level of the implant. All implants were locked in the flexion position, and all patients required reoperation. This is the first reported case series of ...In 2015, FDA approved an update to the Mobi-C labeling to include five year clinical results. Of note, Mobi-C demonstrated superiority at all time points to five years on overall trial success as compared to two-level ACDF. The Mobi-C consists of two cobalt chromium (CoCr) endplates that are plasma sprayed with titaniumAbout this app. Mobile trade support system "Mobi-S" is a software package designed to automate the work of sales representatives. Automate order picking, wheel trading and collecting merchandising information. Easy integration with the main configurations of 1C Enterprise 8.2, 8.3 and 7.7. There is everything you need to collect applications ...Mobi C Artificial Disc New research studies by the North American Spine Society — the most respected international society of spine surgeons — have shown that when a person has a herniated disc in the neck, and traditional fusion surgery is performed, there is an increased incidence of herniation at an adjacent segment.As a potential candidate for cervical disc replacement, ZimVie offers the Mobi-C Reimbursement Services Program. This service is intended to help establish coverage with commercial insurers who are not currently covering Mobi-C for one or two levels. Contact the ZimVie Mobi-C reimbursement hotline 877-331-0062 and [email protected] for assistance.Mobi-C is a great option, arguably the best option in the correct patient. The main benefit of a Mobi-C is that you adjacent levels are less likely to break down and cause issues due to the fact that the natural range of motion is preserved. A disc replacement in the cervical spine is a great option for the correct pathology.Mobi-C is a great option, arguably the best option in the correct patient. The main benefit of a Mobi-C is that you adjacent levels are less likely to break down and cause issues due to the fact that the natural range of motion is preserved. A disc replacement in the cervical spine is a great option for the correct pathology.The Mobi-C Cervical Disc has been designed for cervical disc replacement to restore segmental motion and disc height. TrellOss ®- C Porous Ti Interbody System TrellOss-C is an additively manufactured spacer for implantation up to two levels in the cervical spine. Feb 27, 2020 · Zimmer Biomet Spine has announced that more than 150,000 Mobi-C Cervical Discs have been implanted worldwide. Zimmer Biomet holds a commanding position in the $200 million global cervical disc market, according to the company. The Mobi-C device represents an optimal solution with statistical superiority to two-level fusion at seven years. Mobi-C is the first cervical disc FDA approved for both one and two-level indications, and is used to help minimize pain and symptoms associated with bulging or diseased cervical discs. During an artificial disc replacement, the diseased disc will be replaced with the Mobi-C prosthetic disc to restore disc height and the distance between two ... Page 1 of 7 Last Updated 01-DECEMBER-2022 . Zimmer Biomet Patent Marking . This information is provided as notice of patented articles pursuant to 35 U.S.C. § 287(a).

The Mobi-C Cervical Disc has been designed for cervical disc replacement to restore segmental motion and disc height. The components of Mobi-C include superior and inferior cobalt chromium molybdenum alloy endplates coated with plasma sprayed titanium and hydroxyapatite coating, and a polyethylene mobile bearing insert.. Bharat bazaar farmer

Popular Topics