Long-term evaluation of sandblasted and acid-etched implants used as orthodontic anchors in dogs.
The aim of this study was the clinical, radiographic, and histologic evaluation of the tissue surrounding SLA (sandblasted and acid-etched) implants loaded with a continuous and constant force for 52 weeks, after a healing period of 6 weeks, after implant insertion. SLA implants were placed in the maxilla of 3 dogs and the mandible of 5 dogs after a 12-week healing period after extraction. Abutments were attached to the 6 test implants (2 in the maxilla, 4 in the mandible). Superelastic nickel-titanium coil springs were activated between the SLA implants and the canines, producing a force of 200 g (2 N). Two unloaded implants (1 in the maxilla, 1 in the mandible) served as controls. Histologic analysis showed a corticalization of bone trabeculae, thicker at the loaded than at the unloaded implants. New bone formation at the level of the crest was slightly superior in the test implants. A difference between the tension and compression areas could not be observed in the test implants. The mean bone-implant contact values of the test implants for the maxilla and mandible were 40.23% and 49.33%, respectively. In the control implants, the bone-implant contact value was 67.91% for the maxilla and 49.23% for the mandible. SLA implants can be used as an anchorage unit with confidence, in spite of a short healing period and a prolonged force application. Further studies with different force magnitudes and healing periods are required to clarify the effects of healing period and force magnitude on bone quality and quantity.
Aldikaçti
Musa
M
Department of Periodontology, Faculty of Dentistry, University of Ondokuz Mayis, Samsun, Turkey.
Açikgöz
Gökhan
G
Türk
Tamer
T
Trisi
Paolo
P
D000134:Acid Etching, Dental; D000818:Animals; D000044:Dental Abutments; D003722:Dental Alloys; D045662:Dental Etching; D015921:Dental Implants; D004285:Dogs; D008297:Male; D008334:Mandible / Q000473:pathology / Q000601:surgery; D008437:Maxilla / Q000473:pathology / Q000601:surgery; D009532:Nickel; D016382:Orthodontic Appliance Design; D009967:Orthodontic Appliances; D009969:Orthodontic Wires; D016348:Osseointegration / Q000502:physiology; D010012:Osteogenesis / Q000502:physiology; D013499:Surface Properties; D013997:Time Factors; D014025:Titanium; D014087:Tooth Movement Techniques / Q000295:instrumentation; D016474:Weight-Bearing
D003722:Dental Alloys; D015921:Dental Implants; C040654:titanium nickelide; D009532:Nickel; D014025:Titanium