Related Experiment Video
Updated: Aug 18, 2026

Creating Rigidly Stabilized Fractures for Assessing Intramembranous Ossification, Distraction Osteogenesis, or Healing of Critical Sized Defects
Published on: April 11, 2012
Case report: severe infraocclusion ankylosis occurring in siblings
1Department of Orthodontics, University of Rome Tor Vergata, School of Dentistry, Rome. p.cozza@flashnet.it
Aim:
This was to report a rare case of strong familiar tendency of ankylosis of maxillary second primary molars.
Case Report:
Three Caucasian children, male twins of 8.5 years and a sister of 10 years, were diagnosed as having severely infraccluded maxillary second primary molars with underlying second premolars. In all three cases, the early extraction of the infraoccluded molars and an active treatment with cervical extraoral traction allowed the physiologic eruption of second premolars. Follow-up showed that normal vertical relationship and bone height had been obtained.
Conclusion:
Early diagnosis, as well as appropriate treatment and careful follow-up are very important in the presence of severe infraocclusion, when the marginal ridge of affected primary teeth is at or below gingival level.
More Related Videos
Related Concept Videos
Nondisjunction
Nondisjunction
Nondisjunction
Fractures: Bone Repair
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...

