Abstrak 
TREATMENT OF CLASS II DIVISION 1 MALOCCLUSION WITH OPEN ACTIVATOR USING PHYSIOLOGICAL MATURATION INDICATORS (HANDWRIST, CERVICAL VERTEBRAE AND MENARCHE) DURING THE MIXED DENTITION PHASE
Friska D S, Endah Mardiati
Majalah Ortodontik
Indonesia
Friska D S, Endah Mardiati, Majalah Ortodontik
Class II Division I dentoskeletal, open activator, physiological maturation
Background: Treatment of skeletal class II malocclusion with growth modification approach needs assessment of physiological maturation of hand wrist, cervical vertebral, dental calcification rate and menarche. Physiological maturation can be assessed through hand wrist photograph while cervical vertebral is measured through lateral cefalogram and sexual maturation indicators can be measured by using menache. In this cas, the patient is a child aged 9 years and 11 months with class II dentoskeletal malocclusion et cause mandible retrognathia (<SNB : 75o) with chin retraction tendency, facial profile convex, mandibular plane rotates clockwise, interincical angle protrusion (1 toI : 113o), maxillary incisor protrusion and proposition, short lower face height, 5 mm overbite, 12 mm, diastema in the maxilla and mandible, mandibular mid line shift to the left 2 mm, deep bite, class II right and left molar relationship, incompetency lip relationship. Hand wrist analysis indicates phase II (Indonesian children aged 9.7 years old). Vertebral cervical analysis indicates phase I (average Indonesian Children 12.47 years old. Treatment growth modification using open activator for enhance anterior mandibular growth. Treatment resulths improved mandible-maxillary relationship <SNB : 77o, <SNA : 82o, <ANB : 5o), normal chin relationship ((<facial : 82o), 4 mm overjet and 3.5 mm overbite. It can be concluded that orthodontic treatment during growth stage using open activator phase MP3 and CVMI may result in a satisfied respond.