“…However, there is no agreement to date on the benefits of PDT as a coadjuvant to SRP. Although there are descriptions of additional improvements in clinical parameters such as probing depth, clinical attachment level and bleeding on probing (Alwaeli, Al‐Khateeb, & Al‐Sadi, ; Betsy, Prasanth, Baiju, Prasanthila, & Subhash, ; Braun, Dehn, Krause, & Jepsen, ; Campos et al., ; Franco et al., ; Lulic et al., ), other authors have reported no difference resulting from the addition of PDT (Carvalho et al., ; Dilsiz, Canakci, & Aydin, ; Pourabbas et al., ; Theodoro et al., ; Yilmaz et al., ). Overall, most studies have failed to show additional microbiological benefits using PDT as a coadjuvant treatment (Carvalho et al., ; Christodoulides et al., ; Gómez, Domínguez, García‐Kass, & García‐Núñez, ; Yilmaz et al., ).…”