## 4 Discussion  
An anterior open bite can be dental or skeletal and there is a difference between the occlusal planes in both types. Skeletal anterior open bite is mainly caused by the overgrowth of the posterior dental alveolar of maxilla in the molar region, while dental open anterior bite is due to two small dental alveolar in the anterior region [15; 16; 17; 18]. The  
Figure 11: XRD diagrams of new and used Gummetal samples. treatment of anterior open bite is challenging due to a very high relapse date and should relate to the etiology of the malocclusion. Bad habits such as tongue pressing, mouth breathing or thumb sucking [19] can also be taken into account. Mouth breathing can produce long-face syndrome or adenoid facies and is often caused by allergy. Such patients may have a weak biting force and insufficient growth of the mandibular condyle. This type of malocclusion is primarily treated by surgery or with camouflage, involving a change in the occlusal plane with the intrusion of the molar region and the extrusion of incisors. Camouflage treatment includes the use of Tads, the MEAW technique, high-pull headgear, teeth extractions, and now, the utilization of Gummetal wires to facilitate enhock teeth movement. With the introduction of TADs as an effective treatment modality, orthognathic surgery may be avoidable in selected anterior open bite cases [20]. Additionally, TADs are one of the most effective methods for torque control during en-block incisor retraction [21]. [PERSON] could not find cephalometric evidence of any measurable reduction in the distance from the molars to the hard palate using high-pull headgear. He also notes that vertical elastics in the anterior region, which are used to close the bite by extruding the incisors, produced an unstable relationship, leading to common relapse of the teeth [19]. According to studies by [PERSON] during MEAW treatment, the results in the retrusion and extrusion of the maxillary incisors, the distal movement of the maxillary first molars, and the uprighting of the maxillary first premolars and the mandibular first molars were better in the group with the extraction of the second upper molar teeth than without extraction [22]. In non-extraction treatment of anterior open bite using MEAW technique, the uprighting and retrusion of the premolars and molars and the extrusion, uprighting and retrusion of the incisors and canines played important roles [23]. Analysis of the post-treatment and follow-up cephalometric radiographs proved that the treatment results obtained by this therapy were very stable [24]. In camouflage treatment, the edges of the maxillary central incisors should serve as the guide for the anterior limit of the upper occlusal plane. Their position relative to the lip line must be at or near the 4 mm norm, as measured cephalometrically [19]. We should identify whether the lower, upper, or both occlusal planes require correction. Sometimes the extraction of second molars is necessary to eliminate the blocking effect. Additionally, the extraction of first molars has been prescribed for open bite treatment, but soon after such an extraction, the maxillary sinus descends and creates a cortical lining along the sinus surface [19]. Therefore, if the first molars are healthy and not malformed, they should be preserved in the occlusion. The MEAW technique is effective in the treatment of open bite but it is very difficult and requires professional and time-consuming bends. The new Gummetal wires give us an easier way to upright inclined mesially teeth, extrude the incisors, and intrude the molars, ultimately closing the open bite. The new concept of en-block teeth movement by [PERSON] requires tip-back bends about of 60 degrees on both 0.018 \(\times\) 0.022 or 0.018 \(\times\) 0.025 arches, and the use of intermaximillary light elastics on the anterior teeth to oppose the intrusive force on this segment and prevent flareout. It is mandatory to bend an active progressive torque by about 45 degrees.