Effects of class II intermaxillary elastics on masticatory muscle activity balance, occlusal contact area and masticatory performance: A multicenter randomised controlled trial

Abstract

Bilateral Class II intermaxillary elastics (CII elastics) have been commonly used in orthodontics to assist the correction of Class II dental relationships and to enhance the anchorage units. The elastics are applied directly between the posterior lower jaw and anterior upper jaw to generate a force ranging from 1.5-6 oz or around 42.5-170 g per side. 1 The forces generated by CII elastics not only cause tooth movement, but also mandibular movement. 2 Previous studies reported upward forward movement of the mandibular first molars,

Prevalence of temporomandibular disorders in clear aligner patients using orthodontic intermaxillary elastics assessed with diagnostic criteria for temporomandibular disorders (DC/TMD) axis II evaluation: A cross‐sectional study

“…Intermaxillary elastics are orthodontic components employed to facilitate the reestablishment of the appropriate occlusal connection between the maxilla and mandible. These elastics facilitate the alignment of teeth and jaws by rectifying the inter‐jaw relationship, thereby positioning them correctly 40 . Nevertheless, intermaxillary elastics may exert specific impacts on the TMJ 40 .…”

“…These elastics facilitate the alignment of teeth and jaws by rectifying the inter‐jaw relationship, thereby positioning them correctly 40 . Nevertheless, intermaxillary elastics may exert specific impacts on the TMJ 40 . There are various aspects that can impact the probability of getting TMD subsequent to the utilisation of intermaxillary elastics.…”

“…However, it is important to emphasise that the population in this study consists only of adult patients. Also, it is routine practice to employ Class II intermaxillary elastics for the purpose of correcting Class II dental occlusions and increasing anchoring units 40 . According to Nalamliang and Thongudomporn, the use of these elastics results in the generation of forces that not only induce tooth displacement but also influence mandibular movement 40 .…”

“…40 Nevertheless, intermaxillary elastics may exert specific impacts on the TMJ. 40 There are various aspects that can impact the probability of getting TMD subsequent to the utilisation of intermaxillary elastics.…”

“…40 According to Nalamliang and Thongudomporn, the use of these elastics results in the generation of forces that not only induce tooth displacement but also influence mandibular movement. 40 Nevertheless, the utilisation of intermaxillary elastics, particularly in individuals with Class…”