###### Abstract  
The current study aimed to perceive and estimate the distribution of stress generated by the forces on the maxillary anterior teeth during orthodontic retraction using the bilateral mini screw implant. Finite element models were generated from the three-dimensional (3D) reconstruction of the maxillary arch via cone-beam computed tomography (CBCT). These models imitate the retraction of maxillary anterior teeth with the mini screw placed as the skeletal anchorage. The titanium mini screw of 1.3 mm \(\times\) 8 mm dimension was placed at a height of 9 mm between the first molar and second premolar on both sides of the maxilla. A nickel titanium (NiTi) coil spring of 9 mm length was attached from the mini screw implant to the power arm which generated a force of 250 gm/side. Two different power arms were placed between the lateral incisor and canine at a height of 4 mm (group 1) and 8 mm (group 2), respectively. There were no significant differences observed when the stress values were compared to the left side and the right side in group 1 with a power arm of 4 mm. In group 2, the stresses around the lateral incisors were found to be on the higher side when compared with the central incisors and canines. The length of the power arm shows no significant difference in stress distribution pattern on the left and right sides except for stresses moving from the canine region to the lateral incisor region with the increase in power arm height. finite element model; en masse retraction; orthodontic stress; mini screw; implant 20221203720220220220220220220220220220220220220222022202220222022220222202222202 anchorage [2]. The treatment aim in such cases is to reduce the anterior proclination which is sometimes crucial to attain due to the stability of anchorage. Orthodoxits often face difficulties with achieving maximum anchorage without experiencing anchorage loss. In the case of anchorage loss, the anchored unit acts reciprocally, which complicates the anterior-posterior correction and constrains the achievement of orthodontic treatment [3]. En massive retraction, which requires a maximum anchorage, is the most common procedure in orthodontic treatment to retract the whole arch. However, standard en masse retraction causes upper anterior teeth extrusion. Therefore, patients with deep bites, gummy smiles, or increased vertical growth might experience unfavorable outcomes [4]. Recently, mini screw implants expanded immense recognition to minimize the adverse effects of conventional en masse retraction procedures [5; 6; 7]. Orthodontic mini screws have been positioned between the second premolar and first molar in the buccal interdental spaces to avoid unwanted movements of the anchoring teeth during the en masse retraction procedure for maxillary anterior teeth. These orthodontic screws are easily removable without any fracture and provide stability of anchorage [8; 9]. Moreover, patients' cooperation is not necessary for mini screws' anchorage systems, which aided orthodontists by adding continuous force, which could shorten the duration of orthodontic treatment [10]. For obtaining an ultimate result in the orthodontic treatment, controlling the movement of anterior teeth is imperative. A guided anterior teeth movement could be achieved by using power arms [11]. Displacement and rotation of the anterior teeth often occur while retracting the anterior teeth using mini screws. Moreover, the height of the power arm also changes the biomechanics that imitate the pattern of tooth movement during orthodontic treatment. Therefore, a successful tooth movement requires identifying the appropriate position of the mini screw and the power arms. Previous studies reported about an 80% success rate of the mini screws in orthodontic treatment even though some studies mentioned the mobility observed during the treatment [12; 13; 14; 15]. Nevertheless, few failure rates of the mini screw are inexplicable. Often times, it is related to the placement of the mini screw as well as the direction and magnitude of the mini screw.