# Effectiveness of Laser-Assisted Teeth Bleaching: A Systematic Review
## 3 Results
### General Characteristics of the Included Studies
#### 3.2.5 Potassium Titanyl Phosphate (KTP) Laser-Assisted Bleaching
\begin{table}
\begin{tabular}{c c c c c} \hline
**Study** & **Aim of the Study** & **Material and Methods** & **Results** & **Conclusions** \\ \hline \multirow{4}{*}{[PERSON] E [55]} & Comparison of an & Fifty-one bovine incisors & All whitening methods & All mentioned \\  & Er:YAG laser-activated & were divided into 3 groups: & proved effective, with & bleaching systems are \\  & whitening system with & a diode laser group, & no statistically & effective when used \\  & various light-activated & Er:YAG group, and LED & significant differences & with 35\% H\({}_{2}\)O\({}_{2}\), with \\  & whitening systems. & group. & between them. & an E value above 3.3. \\ \hline \multirow{4}{*}{[PERSON] [65]} & Evaluation of the & & Both the length of time & \\  & Er:Cr:YSGG & Spectrophotometric & application and & \\  & Laser-assisted tooth & & activation with & \\  & laser-assisted tooth & analysis of color change of & Er,Cr:YSGG laser & \\  & whitening method and & 24 bovine incisors, with & influenced the & \\  & its comparison with the & crowns separated from & effectiveness of the & \\  & traditional method. & the roots. & treatment. & \\  & traditional method. & Laser-treated groups & & \\  & & showed greater & \\  & & & color change. & \\ \hline \multirow{4}{*}{[PERSON] [40]} & Comparison of teeth & Twenty fresh incisors were & Laser whitening & \\  & Ourignation of teeth & divided into 2 groups. In & produced significantly & \\  & whitening effectiveness & group 1, bleaching was & better results than & \\  & using Opalescence Xtra & performed using a diode & without activation, & \\  & Boost and LaserSmile & laser activated 35\% HP gel. & laster activated 35\% HP gel. & both increasing & \\  & gel activated by a diode & In group 2, Opalescence & whiteness and reducing & \\  & laser. & Xtra Boost Gel containing & the degree of the & \\  & & 38\% HP was used. & yellowing of the teeth. & with 38\% hydrogen \\  & & & & peroxide gel. \\ \hline \multirow{4}{*}{[PERSON] [41]} & Comparison of two & Thirty patients were & & \\  & different in-office & treated, half of the arch of & & \\  & bleaching protocols & their teeth with traditional & Both treatments were & \\  & bleaching protocols & application protocols and & effective, with no & \\  & using 6\% peroxide. & other with abbreviated & significant differences. & \\  & & protocols, both activated & & \\  & & with blue light. & & \\ \hline \multirow{4}{*}{Mena-Serrano AP [7]} & Comparison of & Seventy-seven patients & & \\  & bleaching efficacy and & with a right canine from & & \\  & tooth sensitivity of two & maxilla darker than A3 & & whitening was shown \\  & hydrogen peroxide & were selected. Patients & & when 20\% HP gel when \\  & protocols used for IOB, & were distributed in four & & \\  & associated, or not, with & groups. Their tooth color & & \\  & a light-emitting diode & was evaluated each week & & \\  & LED/laser light & and 30 days afterwards & & \\  & & using the VITA Classical & & \\  & activation. & Shade Guide. & & \\ \hline \multirow{4}{*}{[PERSON] N [42]} & Evaluation of the role & Thirty incisors were & & All groups shown & \\  & of light and laser & divided into three groups: & significant differences & \\  & sources in the bleaching & 37.5\%HP, 37.5\%HP + laser & in their mean shade & \\  & ability of 37.5\%HP on & activation, and 37.5\%HP + light activation. & & \\  & & light activation. & & \\ \hline \end{tabular}
\end{table} 
Table 1: _Cont._