Predictive Value of Reduced Keratinized Mucosa on the Secondary Prevention of Peri-implant Mucositis and Periimplantitis in Patients Attending Regular Supportive Peri-implant Care. A Longitudinal Analysis

"1. Examination of the inclusion criteria~2. Medical history/patient-specific data (smoking, tumour diseases, radiation, gender, number of implants, history of periodontitis).~3. Recording of implant-specific parameters (measurement depth at six sites per implant(probing depth/PD), bleeding and or pus on probing (BOP) at six measurement sites per implant, condition of the peri-implant mucosa using the modified plaque index(mPI) and the modified ginigiva index (mGI), measurement of the width of the keratinised mucosa(KM), type of denture, approximal plaque index (API), radiographically detectable bone resorption."