Assessment of Dentoskeletal Changes After Treatment of Skeletal classII by Twinblock Versus Monoblock Appliances

Assessment of Dentoskeletal Changes After Treatment of Skeletal classII Growing Patient by Twinblock Versus Monoblock Appliance

Assessment of dentoskeletal changes after treatment of skeletal classII growing patient by twin block versus mono block ,clinical trial stuy

Group(A):patients will be treated with twinbLock Group(B):patients will be treated with monobLock

Inclusion Criteria:

• Female patients to avoid any sexual dimorphism which may affect the comparison.
• Skeletal Class II (ANB° > 5°) with normal maxilla (SNA° = 82° ±4°) and retrognathic mandible (SNB° < 87°).
• Age range from 9 to 12 years.

Exclusion Criteria:

• Previous history of orthodontic treatment.
• Congenitally missing or extracted permanent teeth.
• Posterior cross bites or severe maxillary transverse deficiency.
• Severe facial asymmetry determined by clinical or radiographic examination.
• Poor oral hygiene.
• Systemic diseases that may affect the treatment results.