## 2 Materials and Methods  
A total of 32 subjects (15 men and 17 women) who were in the retention phase after completing orthodontic treatment were included in the study. Patients were aged 15 to 28 years with a mean age of 18.62 (\(\pm\)4.17), and 62.2% were aged under 18 years. At the beginning of their orthodontic treatment, 18 patients had an intermaximillary relation in the canine's zone Angle Class I, while 14 had Angle Class II. A total of 18 patients underwent treatment without extractions and 14 underwent treatment with extractions, while 12 had impacted teeth, as shown in Table 1. The average age was 17.34 (\(\pm\)3.71) for men and 19.12 (\(\pm\)6.02) for women. The average duration of treatment was 27.68 months (\(\pm\)6.46) for men and 29.12 (\(\pm\)2.98) for women. All patients wore an Essix retainer on the upper dental arch and a fixed canine-to-canine retainer on the lower dental arch. The norm for completion of orthodontic treatment, regardless of whether it involves extraction or not, is the achievement of an orthognathic bite, coincidence of the midlines of the upper and lower jaw, multiple contacts, and Angle Class I. This was also the reason for conducting the study on orthodontically treated patients with balanced occlusion. The presented methodology can be used in many cases, such as to detect traumatic areas after prosthetic treatment, implant placement, bruxism patients with the help of occlusion and disocclusion time values, temporomandibular joint (TMJ) disorders, asymmetrical lower jaw movement due to blockage, etc. [20; 24; 30]. Intraoral scanning was performed using Trios Standard Pod (3 Shape, Copenhagen, Denmark, 2014). The workflow included scanning the upper and lower dental arches and the right and left bites. The information was formatted and saved as an STL file using the specialized 3 Shape Unite (2021) software. The same clinician performed the scans with the two devices. For more precise analysis, digital imaging of the occlusion relationship was performed using T-Scan Novus (Tekscan, Norwood, United States, 2018). The system comprises of a sensor, sensor frame, handle, cable, and system unit. The pressure-sensitive sensor is placed in a holder (frame) towards the device and is positioned between the dental arches. The patient is in an upright position with the back of the dental chair at the maximum straight position, and the head is straight without touching the headrest. The proper technique requires the position of the holder being parallel to the floor. The pin of the sensor frame is situated between the upper central incisors. The patient closes their mouth to ensure complete contact (Figure 1). For better visualization, intraoral scans were preimported. Without intraoral scans, the first step before digital measurement of the occlusion is to measure and fill the frontal teeth's mesiodistal size and add information about the dental status (especially missing teeth). The clinician needs articulation paper to find the corresponding contact of the digital image. Preimportation of the intraoral scans shortens the clinical time. Here, contact points are positioned on the tooth surfaces of the screen image and can easily be found in the patient's mouth. Licensed software version 10.0.40 (T-Scan 10, Tekscan, 2022) was used. Before starting the examination, both digital systems require the entry of dental status, which minimizes contact misplacement. Importing a scan from one system to the other also reduces the potential for error. The statistical package SPSS version 23.0 was used to perform statistical computations. The patients' demographic characteristics were analyzed using descriptive statistics. Counts and percentages were used for categorical variables. The mean and standard deviation were used for the occlusal force percentage of the four zones of first contact. Microsoft Office 2016 was used for tables and figures.