CASE REPORT By Jay W. Gerber, DDS, FICCMO, DIAO, DAIPM W Many studies indicate that passive self-ligating brackets (SLB) are more efficient than the more commonly used mini-twin bracket systems. This appears to be expressed during the initial stages of orthodontic treatment due to the reduction in frictional resistance. To derive the maximum benefit of the qualities of SLB, an efficient progressive arch wire system is proposed. it is essential to understand and accept the functional nature of orthodontic and orthopedic appli-ances. The enhanced qualities of the SLB type bracket systems in many ways replicate the forces and actions of functional expan-sion appliances. Unfortunately, attempts in this area by many specialists have often fallen short due to the dogmatic insistence on the supposed fact that functional appliances don’t work and arch forms are not expandable. When this clinician first began to use functional jaw orthopedics (or FJO) concepts, with functional appliances in the early 1980s, I became aware that more liberal arch development was possible and stable over many years. It was through clinical experi-ences that I became much better prepared to initiate arch wire sequencing that matched those qualities of the SBL bracket system. Any clinician who has studied and practiced the works of Dr. Ronald Roth understands that tooth and bone movement is rather easy to integrate, unlike the experts that had experienced only with fixed braces. Here is an outline of my arch wire sequence for use with the passive SLB system using the MBT prescription. hen using a passive self-ligating bracket system (SLB), it is essential to understand the various forces exerted by the arch wires and the anchorage points on the brack-ets including the face and base. To further enhance the efficiency of passive SLB in the initial stage, middle activation stage and the finishing stage, it is proposed that specific and effective arch wire sequencing be employed. Application: SLB and MBT Bracket Rx When selecting a specific arch wire in the sequence of treatment, 12 Winter 2023 JAOS