## 3 Results
### Hard Tissue Measurements Analysis  
Table 1 illustrates all hard tissue changes following surgery. The convexity increased in all patients, indicating the achievement of profile harmonization. All subjects showed mandibular length reduction. The upper anterior face height decreased in all participants, except for the patient who underwent a bilateral sagittal split osteotomy (patient 2) (Figure 1). The lower facial height decreased in all patients. The A to N perp value decreased in the three patients subjected to bimaxillary surgery, which indicated a mandibular advancement. The Pog to N perp value increased or decreased depending on whether the initial position of the Pogonion was posterior or anterior to the perpendicular to the Nasion. The IMPA angle increased in all cases; indeed, through the pre-surgical decompensation orthodontic phase, the lower incisor torque, initially lingualized to compensate for the skeletal Class III malocclusion, was modified following the treatment. The Wits index increased in all patients, confirming the achievement of a correct relationship between the bone bases at T1. The FH-NA angle and the Ar-ANS distance increased in patients undergoing bimaxillary surgery due to a \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline  & **Patient 1** & & **Patient 2** & & **Patient 3** & & **Patient 4** & \\ \hline
**Soft tissue measurements** & **T0** & **T1** & **T0** & **T1** & **T0** & **T1** & **T0** & **T1** \\ \hline
**Distance Li-Apo** & \multirow{2}{*}{10.9 mm} & \multirow{2}{*}{14.7 mm} & \multirow{2}{*}{53.9 mm} & \multirow{2}{*}{51.7 mm} & \multirow{2}{*}{19.8 mm} & \multirow{2}{*}{18.1 mm} & \multirow{2}{*}{17.0 mm} & \multirow{2}{*}{15.1 mm} \\  & and line A-pog & & & & & & \\ \hline
**Distance 1s** (upper axial point)-**Apo** & \multirow{2}{*}{18.1 mm} & \multirow{2}{*}{17.4 mm} & \multirow{2}{*}{21.9 mm} & \multirow{2}{*}{17.6 mm} & \multirow{2}{*}{21.2 mm} & \multirow{2}{*}{21.2 mm} & \multirow{2}{*}{15.4 mm} & \multirow{2}{*}{16.5 mm} \\  & & & & & & & \\ \hline
**Angle Li** (lower axial point)-**Apo** & \multirow{2}{*}{25.9\({}^{\circ}\)} & \multirow{2}{*}{27.9\({}^{\circ}\)} & \multirow{2}{*}{31.5\({}^{\circ}\)} & \multirow{2}{*}{25.4\({}^{\circ}\)} & \multirow{2}{*}{35.0\({}^{\circ}\)} & \multirow{2}{*}{31.5\({}^{\circ}\)} & \multirow{2}{*}{27.7\({}^{\circ}\)} & \multirow{2}{*}{26.3\({}^{\circ}\)} \\  & & & & & & & \\ \hline
**Upper lip-N perp** & 19.3 mm & 21.0 mm & 27.8 mm & 19.9 mm & 17.8 mm & 25.7 mm & 20.4 mm & 23.0 mm \\ \hline
**Lower lip-N perp** & 22.2 mm & 19.1 mm & 27.8 mm & 18.6 mm & 16.0 mm & 22.3 mm & 23.8 mm & 24.6 mm \\ \hline
**Distance between point Li and E line** & 6.7 mm & 7.1 mm & 5.0 mm & 4.0 mm & \(-1.2\) mm & 1.5 mm & 2.8 mm & 3.3 mm \\ \hline
**Labio-mental angle** (Lab) angle between the lines tangent to the lower lip and pogonion passing through the sublabial point & \multirow{2}{*}{160.5\({}^{\circ}\)} & \multirow{2}{*}{147.5\({}^{\circ}\)} & \multirow{2}{*}{143.0\({}^{\circ}\)} & \multirow{2}{*}{113.5\({}^{\circ}\)} & \multirow{2}{*}{91.7\({}^{\circ}\)} & \multirow{2}{*}{104.4\({}^{\circ}\)} & \multirow{2}{*}{104.1\({}^{\circ}\)} & \multirow{2}{*}{95.9\({}^{\circ}\)} \\  & & & & & & & \\ \hline
**Nasolabial angle** (NLA) & 86.7\({}^{\circ}\) & 86.4\({}^{\circ}\) & 104.3\({}^{\circ}\) & 110.6\({}^{\circ}\) & 89.7\({}^{\circ}\) & 85.0\({}^{\circ}\) & 119.4\({}^{\circ}\) & 107.4\({}^{\circ}\) \\ \hline
**Stomion angle** between upper and lower lips & 80.3\({}^{\circ}\) & 114.8\({}^{\circ}\) & 111.8\({}^{\circ}\) & 66.6\({}^{\circ}\) & 80.0\({}^{\circ}\) & 67.4\({}^{\circ}\) & 78.9\({}^{\circ}\) & 86.8\({}^{\circ}\) \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Comparison of soft tissue measurements of the patients from T0 to T1. The measurements were performed on the profile photographies of the four patients. Figure 1: Lateral vision from the CBCT. The head is oriented on the Frankfurt plane (Or-Po). On the left (T0), the upper anterior face height measured 52.8 mm; on the right (T1), it measured 48.5 mm.