The purpose of this study is to evaluate the efficacy of an intravenous (IV) perioperative dexamethasone regime in the clinical outcomes after a robotic-assisted Total Knee Arthroplasty (TKA) in a Hispanic population. The study aims to propose an alternative to opioid-based pain treatment following TKA. The study hopefully validates the use of a two-dose, 8mg intravenous dexamethasone regimen for improving pain and range of motion scores in patients undergoing primary, unilateral TKA for osteoarthritis. One dose will be applied prior to incision and the other at post-operative day (POD) 1.

Inclusion Criteria:

• Patient with Hispanic self-identification
• Primary robotic-assisted TKA for treatment of primary osteoarthritis
• Age ≥ 21
• Receiving seven days of inpatient rehabilitation after medical discharge
• Patient with adequate glycemic control (HbA1c<7.5%)
• Patients who provide written informed consent

Exclusion Criteria:

• Age ≤ 21
• Chronic steroid use prior to surgery
• Previous allergies or adverse reactions to steroid drugs
• Indications for surgery other than primary osteoarthritis
• History of narcotics abuse such as opioids
• Surgeries performed without robotic-assistance
• Outpatient or Home rehabilitation programs after medical discharge
• Requirement of revision surgery orthopaedic implants
• Patients with inadequate glycemic control (HbA1c≥7.5%)
• Other medical conditions, such as osteoporosis, fungal infections, glaucoma, joint infections, peptic ulcer disease which could worsen with steroid administration.