Success rate of mini- and micro-implants used for orthodontic anchorage: a prospective clinical study.

OBJECTIVES Whereas micro-implants have become a useful alternative as orthodontic anchorage elements in orthodontics, less is known about the clinical effectiveness of micro-implants. The aim of this prospective clinical study was to evaluate the success rate of micro-implants used for orthodontic anchorage. MATERIAL AND METHODS A total of 133 mini-implants (79 Abso Anchor, 54 Dual Top implants) placed in 49 patients to support orthodontic tooth movements were examined in the study. The majority of the implants were placed in the maxilla (82), followed by the vestibular (42) and lingual (nine) aspect of the mandible. RESULTS An overall cumulative survival rate of 86.8% (102/133) was found by Kaplan-Meier analysis. The failure rate between Dual Top implants (13%) and Abso Anchor implants (30.4%) differed significantly (P=0.0196; log-rank test). The cumulative failure rate of implants was found to be significantly higher when implants were placed in the lingual aspect of the mandible compared with the other localizations (P=0.0011; log-rank test). Clinical evaluation revealed successful dental movements when implants remained stable during the orthodontic therapy. CONCLUSIONS The present results confirm the effectiveness of orthodontic micro-implants used as anchorage elements.

[1]  Torsten Jemt,et al.  Osseointegrated titanium implants—a new approach in orthodontic treatment , 1988 .

[2]  H. Wiesmann,et al.  IDENTIFICATION OF APOPTOTIC CELL DEATH IN DISTRACTION OSTEOGENESIS , 1999, Cell biology international.

[3]  Y Shibasaki,et al.  A clinical and histological evaluation of titanium mini-implants as anchors for orthodontic intrusion in the beagle dog. , 2001, American Journal of Orthodontics and Dentofacial Orthopedics.

[4]  P Diedrich,et al.  Palatal implant anchorage reinforcement of posterior teeth: A prospective study. , 1999, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[5]  K. Higuchi,et al.  The use of titanium fixtures for intraoral anchorage to facilitate orthodontic tooth movement. , 1992, The International journal of oral & maxillofacial implants.

[6]  U. Joos,et al.  Biological and biomechanical evaluation of bone remodelling and implant stability after using an osteotome technique. , 2004, Clinical oral implants research.

[7]  Hannover,et al.  Erfolgsraten von Mini- und Mikroschrauben zur skelettalen Verankerung in der Kieferorthopädie , 2005 .

[8]  B Melsen,et al.  Biological reactions of alveolar bone to orthodontic loading of oral implants. , 2001, Clinical oral implants research.

[9]  U. Joos,et al.  Interface reaction at dental implants inserted in condensed bone. , 2005, Clinical oral implants research.

[10]  E. Harms,et al.  Palatal development of preterm and low birthweight infants compared to term infants – What do we know? Part 3: Discussion and Conclusion , 2005, Head & face medicine.

[11]  U. Lekholm,et al.  Osseointegrated implants as orthodontic anchorage in the treatment of partially edentulous adult patients. , 1994, European journal of orthodontics.

[12]  O. Dörtbudak,et al.  Short epithetic implants for orthodontic anchorage in the paramedian region of the palate. A clinical study. , 2001, Clinical oral implants research.

[13]  H. Wehrbein,et al.  Palatal bone support for orthodontic implant anchorage--a clinical and radiological study. , 1999, European journal of orthodontics.

[14]  H. Tsuru,et al.  The effects of early occlusal loading on one-stage titanium alloy implants in beagle dogs: a pilot study. , 1993, The Journal of prosthetic dentistry.

[15]  D. Wiechmann,et al.  L’ancrage intra-osseux en orthodontie à l’aide de mini- et de microvis , 2005 .

[16]  R. Haas,et al.  Bicortical titanium screws for critical orthodontic anchorage in the mandible: a preliminary report on clinical applications. , 2001, Clinical oral implants research.

[17]  U. Joos,et al.  Ultrastructural characterization of the implant/bone interface of immediately loaded dental implants. , 2004, Biomaterials.

[18]  H. Mitani,et al.  Skeletal anchorage system for open-bite correction. , 1999, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[19]  Dirk Wiechmann,et al.  Load-related implant reaction of mini-implants used for orthodontic anchorage. , 2005, Clinical oral implants research.

[20]  U. Joos,et al.  Strain-related bone remodeling in distraction osteogenesis of the mandible. , 1999, Plastic and reconstructive surgery.

[21]  Y Zilberman,et al.  Osseous adaptation to continuous loading of rigid endosseous implants. , 1984, American journal of orthodontics.

[22]  R K Gongloff,et al.  Rigid endosseous implants for orthodontic and orthopedic anchorage. , 1989, The Angle orthodontist.

[23]  H. Wehrbein,et al.  Das Orthosystem — Ein neues Implantatsystem zur orthodontischen Verankerung am Gaumen , 1996, Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie.

[24]  E. Bressan,et al.  Orthodontic anchorage with specific fixtures: related study analysis. , 2002, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[25]  A. Stenvik,et al.  The efficacy of two-stage titanium implants as orthodontic anchorage in the preprosthodontic correction of third molars in adults--a report of three cases. , 1991, European journal of orthodontics.