success and failure rates of orthodontic microimplants (Aclinical study)

Aims: To evaluate the rates of success and failure regarding
the mobility of orthodontic microimplants in patients
undergoing fixed orthodontic appliance treatment. Materials
and Methods: The sample consisted of 36 titanium
microimplants (AbsoAnchor, Dentos inc. Korea) inserted in
15 female patients. The mean age for the patients was 25.53
years. Microimplants of 1.2 mm in diameter and 610 mm in
length were used. A selfdrilling method was used. A small
vertical stab incision and the microimplants inserted with a
screwdriver. The patients were seen periodically every 34
weeks. A microimplant with complete absence of a clinically
detectable mobility was considered as a successful one.
Whereas failure was defined as a microimplant mobility
within 8 months. Results and Discussion: The total success
rate for microimplants for both jaws was (86.1%). Whereas a
(91.7%) success rate was recorded in the upper jaw and in the
lower jaw it was (75%).Despite of higher failure rates in the
mandible, which may be attributed to the occlusal force, yet
they remain non significantly different from those in maxilla.
Conclusions: The relatively high success rates of
microimplants make them an appropriate solution for
providing absolute anchorage whenever being needed in
orthodontic therapy.