Early orthodontic treatment


The ideal time for treatment with LM-Activator™ is in early mixed dentition when the first teeth are changing. By intervening early, the need for further treatment can be significantly reduced and even eliminated. Research indicates that malocclusions in deciduous dentition persist and tend to become more severe as the dentition develops. LM-Activator™ provides soft guidance to teeth and jaws when needed.

The results indicate that orthodontic intervention with eruption guidance appliance in the early mixed dentition is an effective treatment modality for malocclusions with Class II or Class II tendency, excess overjet, deep bite, open bite, crowding, anterior crossbite, or buccal crossbite (scissorsbite).

Katri Keski-Nisula, et al. Orthodontic intervention in the early mixed dentition: A prospective, controlled study on the effects of the eruption guidance appliance. American Journal of Orthodontics and Dentofacial Orthopedics, February 2008

Simple and easy treatment

No separate treatment phases but simultaneous alignment, leveling and anteroposterior correction reducing treatment complexity.

Effective method

An effective treatment modality for malocclusions with Class II or Class II tendency, excess Overjet, Deep bite, Open bite, Crowding, anterior Crossbite, or buccal Crossbite (Scissorsbite).

LM-Activator boy and girl

Evidence based treatment method

The treatment method proven by research results, and the appliance has been used by a million of patients around the world.


Early interceptive treatment

LM-Activator™ has proven to be effective in treatment of typical malocclusions in different dental stages.


Deep bite


Open bite


Anterior crossbite

Angle Class II

LM-Activator™ corrects typical malocclusions like excess Overbite or Deep bite, excess Overjet, Open bite, Crowding, anterior Crossbite and Angle Class II or Class II tendency. Sagittal and vertical relationships can be corrected simultaneously.

The use of LM™ orthodontic appliances during the growth

PINK LM-Trainer™ | YELLOW, ORANGE LM-Activator™ Short | BLUE, GREEN LM-Activator™ Long


A thorough case-by-case analysis of the patient’s malocclusion and its severity as well as the patient’s motivation is needed. Evaluating the dentoalveolar, skeletal and functional characteristics of the patient is an essential part of selecting cases for LM-Activator™ treatment. Typical cases include Deep bite, Crowding and dentoalveolar anterior Crossbite.

The chart provides demonstrative guidelines for case selection:

Effect not proven for:

  • Skeletal Class III
  • Midline discrepancy >3 mm *)
  • Very narrow upper arch *)
  • Palatally impacted teeth *)
  • Severely rotated posterior teeth *)
  • Fully erupted anterior teeth that require torqueing *)

*) May be treated with combination treatment (LM-Activator™ together with other appliances such as quad helix).

The treating doctor is solely responsible and liable for diagnosis, treatment, and evaluating whether treatment with LM-Activator™, LM-Trainer™ or any other LM-Dental™’s product is appropriate for a specific patient, and for the outcome of any treatment with LM-Activator™, LM-Trainer™ or any other LM-Dental™’s product. Product used, and use of products shall be determined solely by doctor and evaluated for use with each individual patient where appropriate. Please refer to manufacturer’s instructions for use.