Evaluation of root resorption following different mandibular incisors intrusive mechanics : A randomized clinical trial

Inclusion Criteria:

• Patient will be included in this study if has:

  • An age range between 12 and 16 years.
  • Deep overbite with excessive curve of Spee of more than 5mm
  • Over erupted lower incisors.
  • Permanent teeth are all present (except for third molar).
  • No previous orthodontic treatment.
  • No indications or symptoms of periodontal disease in the past or present, as determined by clinical and radiographic examination

Exclusion Criteria:

• Patients who needed surgery to fix skeletal problems.
• Any previous trauma or root canal therapy
• Missing lower incisor.
• Patients with congenital dentoskeletal disorders

Observation:

Each patient will be followed up on periodic base for progress evaluation and integrity checks, as well as root resorption will be evaluated using CBCT images taken before and after the intrusion.

Ethical considerations:

An informed consent form (attached copy) that explains every step in the research will be given and discussed carefully with the patient and his/her parents before participation in the study and should be signed freely. The objectives of the study will be discussed and explained with the patients and / or their guardians and they will receive a copy of the consent form as well.

Data management and analysis:

The data will be collected, tabulated, and statistically analyzed using Statistical Package for Social Sciences (SPSS program, version 18, Inc., Chicago, III).