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. 2015 Dec 11;9:393–395. doi: 10.2174/1874210601509010393

Table 2.

Proposed classification of peri-implantitis.

Staging Definition
Stage I BoP and/or SUP and bone loss ≤ 3 mm beyond biological bone remodeling
Stage II BoP and/or SUP and bone loss > 3 mm and < 5 mm beyond biological bone remodeling
Stage III BoP and/or SUP and bone loss ≥ 5 mm beyond biological bone remodeling
Stage IV BoP and/or SUP and bone loss ≥ 50% of the implant length* beyond biological bone remodeling

BoP = bleeding on probing; SUP = suppuration

* Depending on implant length, if peri-implantitis can be classified as simultaneously corresponding to more than one stage, the most advanced stage should be chosen.