40
Participants
Start Date
May 1, 2017
Primary Completion Date
May 1, 2019
Study Completion Date
May 1, 2019
Photodynamic therapy
Photodynamic therapy (HELBO Photodynaimc Systems GmbH, Wels, Austria)
Mechanical debridement
Plastic scalers (Have implantrecallset, Kerr, Italy) will be used to curette the contaminated sites.
Irrigation
0.2% chlorhexidine digluconate solution (Bioworld, Madision, US) will be irrigated at contaminated sites for 1 minute.
Shanghai Ninth People's Hospital, Shanghai
Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University
OTHER