A Classification Proposal for Peri-Implant Mucositis and Peri-Implantitis: A Critical Update

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.