# Evaluation of the Nasolabbial Angle in Orthodontic Diagnosis: A Systematic Review
## Materials and Methods
### Summary Measures and Approach to Synthesis
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & \multicolumn{4}{c}{**(B)**} \\ \hline \multicolumn{4}{c}{Morphological Characteristics} & & & & Increase In NLA Values & \\ Class II & Of Soft Tissue Profile Of & & & After Treatment, But Values & \\ Malocclusion & Angle\({}^{\circ}\) Class II Division I & 2018 & [PERSON] Et Al. & Are Not Statistically & Not Reported \\  & Malocclusion Before And After & & & Significant & \\  & Orthodontic Treatment [18] & & & & \\ \hline \multirow{4}{*}{\begin{tabular}{c} Class \\ Malocclusion \\ \end{tabular} } & Soft Tissue Profile Changes & & & No Statistical Differences & \\  & After Functional Mandibular & & & Wete Detected Between & \\  & Advance Or Herbst Appliances & 2017 & [PERSON] Et Al. & Both Fras And Ría, NLA & 114.78\({}^{\circ}\) Fma \\  & Treatment In Class II Patients & & & Showed More Pronounced & 118.64\({}^{\circ}\) Herbst \\  & [7] & & & Changes In Herbst & \\  & & & & Appliance Patients. & \\ \hline \multirow{4}{*}{\begin{tabular}{c} Class II \\ Malocclusion \\ \end{tabular} } & Class II Malocclusion Treatment & & & Better NLA Values In & \\  & Effects With Jones Jig And & & Al. & Control Group & 107.25\({}^{\circ}\) \\  & Distal Jet Followed By Fixed & Appliances [8] & & (Untreated Patients) & \\ \hline \multirow{4}{*}{\begin{tabular}{c} Class II \\ Malocclusion \\ \end{tabular} } & Effectiveness Of Early & & & & \\  & Orthopaedic Treatment With & & [PERSON]. & Short-Term Decrease In & \\  & Headager: A Systematic Review & & [PERSON] Et Al. & NLA Values & \\  & And Meta-Analysis [19] & & & & \\ \hline \multirow{4}{*}{\begin{tabular}{c} Class II \\ Malocclusion \\ \end{tabular} } & Comparison Of Treatment & & & & & \\  & Effects Between The Modifies & & & Significant Increase & \\  & C-Palatal Plate And Cervical & & Al. & In NLA And Upper Lip & 81.31\({}^{\circ}\) \\  & Pull Headager For Total Arch & & & Retraction & \\  & Distalization In Adults [20] & & & & \\ \hline \multirow{4}{*}{\begin{tabular}{c} Class III \\ Malocclusion \\ \end{tabular} } & Comparison Of The Soft And & & & & & \\  & Hard Tissue & & & No Statistically Significant & \\  & Effects Of Two Different & & Difference In Both Study & Rme/Fm 98.33\({}^{\circ}\) \\  & Protraction Mechanisms In & & Class III Patients: A & & Groups & Mmp 106.24\({}^{\circ}\) \\  & Randomized Clinical Trial [9] & & & & \\ \hline \multirow{4}{*}{\begin{tabular}{c} Class III \\ Malocclusion \\ \end{tabular} } & Morphological Changes Of & & & & & \\  & Skeletal Class III & & & & Significant NLA & \\  & Malocclusion In Mixed & & & & Decrease & Not Reported \\  & Dentition With & & Et Al. & 5.629\({}^{\circ}\) & \\  & Protraction Combined & & & & \\  & Activities [10] & & & & \\ \hline \multicolumn{4}{c}{**(D)**} \\ \hline Rapid & Soft Tissue Changes In The & & & No Statistically & \\  & Orofacial Region After Rapid & & [PERSON] & Significant Difference In & \\  & Maximillary Expansion [21] & & Both Study Groups & \\ \hline \multirow{4}{*}{\begin{tabular}{c} Orthomatic \\ Surgery \\ \end{tabular} } & Does Maximillary Advancement & & & & No Statistically Significant & \\  & Influence The Nasolabial & & [PERSON] & Difference In Both Study & \\  & Angle\({}^{\circ}\) [22] & & Et Al. & Groups & \\  & Angle\({}^{\circ}\) [22] & & & NLA Decrease 3.78\({}^{\circ}\) & \\ \hline \multirow{4}{*}{\begin{tabular}{c} Orthomatic \\ Surgery \\ \end{tabular} } & Nasolabial Changes Following & 2019 & [PERSON] & With & \\  & Double Jaw Surgery [23] & & Et Al. & Maximillary And & \\  & & & & \\  & & & & \\ \hline \multirow{4}{*}{\
\begin{tabular}{c} Orthomatic \\ Surgery \\ \end{tabular} } & Maximillary Advancement Versus & & & & Mandibular \\  & Mandibular Setback In Class III & & & NLA Increase After & Setback \\  & Dentofacial Deformity:Are & 2016 & Ghassemi & Mandibular Setback & 106.585\({}^{\circ}\) \\  & There Any Differences In & Et Al. & NLA Decrease After Upper & Upper Maximillary \\  & Aesthetic Outcomes? [11] & & & Maximillary Advancement & \\ \hline \multirow{4}{*}{
\begin{tabular}{c} Orthomatic \\ Surgery \\ \end{tabular} } & Effect Of Maximillary & & & & & \\  & Advancement On The Changes & & & & \\  & In The Soft Tissues After & 2015 & [PERSON] & Significant Difference & 100.6\({}^{\circ}\) \\  & Treatment Of Patients With & Et Al. & In Both Study Groups & \\  & Class III Malocclusion [24] & & & & \\ \hline \end{tabular}
\end{table}