Mortality and complication rates in nonagenarians and octogenarians undergoing total hip and knee arthroplasty: a systematic review and meta-analysis.

Although nonagenarians undergoing TKA or THA can achieve the same clinical benefit as octogenarians, they have a higher risk of perioperative complications and 1-year mortality. Therefore, meticulous preoperative screening, proper patient selection and optimization of comorbidities are essential to minimize any postoperative side effects in patients over 90 years of age.