An orthodontic bracket for an orthodontic system has a rear base for being mounted to a tooth and first and second portions extending from the rear base. The first and second portions are spaced apart to provide a slot for positioning an arch wire therein. The first and second portions define a front face with an opening for receiving the arch wire. At least one of the first and second portions includes an adjustable tightening element for adjusting the pressure on the arch wire. An orthodontic bracket system comprises a plurality of brackets for being mounted to the teeth of a patient and at least one inter-bracket adjoining assembly mounted to a pair of adjacent brackets and interposed therebetween. The length of said inter-bracket adjoining assembly is modifiable so as to correspondingly modify the distance between the pair of adjacent brackets.