OrthoAnchor Screws

Screws | Plates

The OrthoAnchor System is ideally suited for all cases, including those in which maximum anchorage force is required. Drill-Free® 1.5mm micro and 2.0mm mini OrthoAnchor screws are designed to be placed in the maxilla and mandible in attached tissue.

The smaller-diameter threaded portion is useful in areas where there is very little space between tooth roots. The 2.0mm screws can be used to achieve more bony contact or to act as an emergency screw for the 1.5mm diameter screw. Both screws are offered with a 1.5mm and 2.0mm soft-tissue collar to allow space for the gingival tissue.

The screw-head diameter is 3.0mm in both the 1.5mm and 2.0 mm screws. To make placement easy and secure, the screw features a friction-fit, cross-drive head that fits the screwdriver blade precisely. Both the edges and the head of the screw can easily be seen during placement and removal.

Pilot holes are recommended in dense bone such as the mandibular cortex, and screws can be placed with either a hand-driven screwdriver or contra-angle attachments.

Orthodontic appliances can be attached using the 0.9mm (0.035") gap on the head of the screw or through the 0.9mm diameter hole in the head of the screw. Between 100 and 300 grams of force are typically applied following placement.

Note that treatment results using the OrthoAnchor System have a better prognosis in patients over the age of 13, and the system can be used only for patients in whom retention can be attained in the cortical bone.

Indications:
  • Present posterior occlusal relationship should be maintained stably.
  • The occurrence of periodontitis and dental caries should be prevented.
  • There is no dental anchorage.
  • Posterior teeth cannot be used as a dental anchorage due to excessive alveolar bone loss.
  • The use of skeletal anchorage can shorten treatment period.
  • When maximum anchorage preparation is required.
  • When skeletal anchorage is required but the width of attached gingiva is insufficient.
Contra-indications:
  • When cortical bone is not thick enough.
  • When the patient has abnormal habit of mastication for retention and stability after implantation.
  • It cannot be used in deciduous or mixed dentition.
  • Active infection.
  • Patient conditions including blood-supply limitations, insufficient quantity or quality of bone, or latent infections.
  • Patients with mental or neurological conditions who are unwilling or incapable of following post-operative care instructions.
  • Foreign-body sensitivity; where material sensitivity is suspected, tests are to be made prior to implantation.

Developed in cooperation with Dr. Paul Thomas, Senior Research Fellow, Eastman Dental Institute, London, England.

Screws | Plates