The Association of Dental Caries or Dental Implant Placement Within One Year of Primary Total Hip Arthroplasty on Medical and Implant Complications

INTRODUCTION Total hip arthroplasty (THA) adverse events among patients who have dental diagnoses remain unclear. We sought to determine if dental caries or dental implant placements increased: 1) 90-day medical complications; 2) 90-day readmissions; and 3) 2-year implant-related complications, including periprosthetic joint infections (PJIs) after THA. METHODS A nationwide database for primary THAs from 2010 to 2021 was queried to compare three patient cohorts. Patients who had a history of dental implants or caries within 12 months prior to THA (n = 1,179) or 12 months after THA (n = 1,218) were case-matched to patients who did not have dental history (n = 6,090) by age and comorbidities. Outcomes included 90-day complications, 90-day readmissions, and 2-year implant-related complications. Logistic regression models computed the odds ratios (OR) of complications and readmissions. P values less than 0.006 were significant. RESULTS Patients who had dental caries or implant placement 12 months before or after THA experienced 1.6-fold greater odds of 90-day medical complications compared to case-matched patients. Readmissions within 90 days increased for patients who had a dental history before (11.7 versus 8.3%; OR: 1.49, P < 0.0001) and after (14.2 versus 8.3%; OR: 1.84, P < 0.0001) THA compared to case-matched patients. A dental caries diagnosis or dental implant placement within 12 months following THA increased 2-year implant complications compared to case-matched patients (15.2 versus 9.3%; OR: 1.69, P < 0.0001), including PJIs (5.3 versus 2.8%; OR: 1.98, P < 0.0001), dislocations (4.4 versus 2.7%; OR: 1.63, P = 0.002), and THA revisions (3.9 versus 2.5%; OR: 1.61, P = 0.005). CONCLUSION Dental diagnoses within 12 months of THA are associated with increased medical complications. Dental diagnoses occurring 12 months after THA are associated with greater implant-related complications, including PJIs. Delaying invasive dental procedures for 12 months after THA may be advisable.