Further surgeries required after TDR.
| Index TDR Site | Reoperation | Duration Between Surgeries |
| L5-S1 TDR (2003) | L4-L5 fusion (2016) L3-L4 TDR (2016) | 13 y |
| L5-S1 TDR (2004) | L3-L4 fusion (2009) | 5 y |
| L3-L4-L5 TDR (2003) | L5-S1 fusion (2016) | 13 y |
| L5-S1 TDR (2002) | Foraminotomy (2003) | 1 y |
| L4-L5-S1 TDR (2003) | L3-L4 fusion (2010) L4-L5 fusion (2018)a L5-S1 fusion (2019)a | 7 y |
| L4-L5 TDR (2003) | Discectomy (2004) L4-L5-S1 fusion (2005)a | 1 y |
Abbreviations: TDR, total disc replacement.
↵a Denotes further surgery at the index (operated) level.