AbstractBackground and Objectives:
The aim of the present study was to assess clinical and histo-pathological healing pattern of peri-implantitis lesions following non-surgical treatment with an Er:YAG laser (ERL).Study Design/Materials and Methods:
Twelve patients suffering from peri-implantitis (n=12 implants) received a single episode of non-surgical instrumentation using ERL (12.7 J/cm2). Assessment of clinical parameters (plaque index (PI), bleeding on probing (BOP), probing pocket depth, gingival recession (GR), and clinical attachment level (CAL)), surgical defect examination, and histopathological examination of peri-implant tissue biopsies was performed after 1, 3, 6, 9, 12, and 24 months.Results:
All patients exhibited improvements of all clinical parameters investigated. However, histo-pathological examination of tissue biopsies revealed a mixed chronic inflammatory cell infiltrate (macrophages, lymphocytes, and plasma cells) which seemed to be encapsulated by deposition of irregular bundles of fibrous connective tissue showing increased proliferation of vascular structures.Conclusion:
It was concluded that a single course of nonsurgical treatment of peri-implantitis using ERL may not be sufficient for the maintenance of failing implants.