# 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
Color was assessed using the \\ \cline{1-1} \cline{2-5}  & & & \\ \cline{1-1} \cline{2-5} \begin{table}
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**Study** & **Aim of the Study** & **Material and Methods** & **Results** & **Conclusions** \\ \hline  & & Thirty incisors were & & \\  & The aim of the study & stained with tea solution & & \\  & was to check if treating & and divided into control & The teeth became & The use of a Nd:YAG \\  & enamel with a Nd:YAG & and experimental groups, & & \\  & laser before the & which were exposed to & with no significant & \\  & bleaching procedure & Nd:YAG laser. Then, all & differences observed & \\  & influences the & samples were bleached & between them. & \\  & bleaching results. & using 35\% & & \\  & & hydrogen peroxide. & & \\ \hline  & & Seventy-two & & \\  & & endodontically treated & & \\  & & incisors were divided into & The whitening effects & \\  & Comparison of 3 laser & 4 groups—the first was & in each group were & \\  & assisted bleaching & bleached only with 35\% & comparable and no & \\  & protocols with & hydrogen peroxide gel, the & significant difference & \\  & conventional walking & second with 35\% HP and a & was found between & \\  & bleach in terms & Nd:YAG laser, the third & samples treated with & \\  & of efficiency. & with 35\% HP + 980 nm & 35\% HP only and 35\% & \\  & & diode laser, and the last & HP + any laser. & \\  & & with 35\% HP + 810 nm & & \\  & & diode laser. & & \\ \hline  & & The dental arches of 32 & & \\  & & patients were divided into & & \\  & & two parts—one was & & \\  & & bleached with 35\% & & \\  & & hydrogen peroxide and & & \\  & LED-activated tooth & activated by an LED, and & & \\  & bleaching treatments. & the other with 35\% HP and & & \\  & & activated by a diode laser & & \\  & & (940 nm). & & \\  & & & \\ \hline  & & Forty teeth were divided & & \\  & & into two groups. One & No significant & \\  & Comparison of home & underwent laser whitening, & difference in color & \\  & bleaching and & the other home whitening. & change in tea-stained & \\  & laser-assisted bleaching & Within each group, & samples. The laser & \\  & using a & subgroups were & whitening results were & \\  & spectrophotometer. & distinguished based on the & better than the home & \\  & & substance used to create & whitening ones. & \\  & & the discoloration. & \\ \hline  & & & \\  & Comparison of & One hundred teeth were & & \\  & effectiveness of tooth & discolored with tea & \\  & bleaching depending & solution and divided into 4 & \\  & on the concentration of & groups: 1—control, & \\  & bleaching agent & 2—bleached with 15, 20, & \\  & & and 35\% CP, 3—the same & \\  & (carbamide peroxide) & CP concentrations as group & \\  & used, using or & 2, but with activation by a & \\  & & 980 nm laser for 2.5 min, & \\  & & 4—as group 3, but with an & \\  & & activation time of 5 min. & \\ \hline \end{tabular}
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Table 1: _Cont._  
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**Study** & **Aim of the Study** & **Material and Methods** & **Results** & **Conclusions** \\ \hline \multirow{8}{*}{Chitsaz F [36]} & Spectrophotometer & Seventy-two CAD-CAM and conventional & Coffee and orange juice & \\  & color and translucency & feldspatible porcelain & cause a change in the & \\  & evaluation of & samples were divided into & color of the porcelain, & \\  & conventional and & samples were divided into & which was less & \\  & conventional and & 3 groups—coffee-stained, & pronounced in the & \\  & CAD-CAM porcelain & orange juice-stained, and & CAD/CAM-produced & \\  & materials after staining & control groups. Then, a & samples. Bleaching is & \\  & and bleaching assisted & diode laser-assisted & effective for both types, & \\  & by a laser. & bleaching procedure was & but the maximum color & \\  & & performed. & that can be achieved is & \\  & & performed. & the pre-staining one.