RFA measurements of survival midpalatal orthodontic mini-implants in comparison to initial healing period

Abstract

Background: In dental implantology, the development of stability over time is a well-investigated topic. In case of orthodontic mini-implants, quantitative data for long-term stability is not available yet. This study aims to clinically investigate the long-term stability of mini-implants inserted in the midsagittal suture of the anterior palate. Moreover, the influence of the length of implants was elucidated. The stability of 2 × 9 and 2 × 11 mm miniimplants after orthodontic treatment (9 mm, 2.84 years ± 1.25 years; 11 mm, 3.17 years ± 0.96 years) was assessed by resonance frequency analysis (RFA). The obtained long-term pieces of data were compared with each other (9 mm vs 11 mm), as well as with the data from the matched early stability groups, to assess the initial and early secondary stability after the insertion from previous clinical trials. Results: For both lengths, the long-term stability (2 × 9 mm, 25.12 ± 7.11, n = 21; 2 × 11 mm, 24.39 ± 5.82, n = 18) was significantly lower than primary stability (2 × 9 mm, 36.14 ± 6.08, n = 19; 2 × 11 mm, 33.35 ± 3.53, n = 20). The differences within the groups disappeared over the initial healing period: after 4 weeks for the 2 × 9 mm implants and after 2 weeks for the 2 × 11 mm implants. Also, the 2 × 9 mm and 2 × 11 mm implants showed comparable long-term stability values. Conclusion: The stability of midpalatal mini-implants does not change in the long term after the initial healing period. Moreover, 2 × 9 mm mini-implants seem to be appropriate for orthodontic anchorage, as the stability of 2 × 11 mm implants is not higher. Therefore, owing to lower invasiveness, 2 × 9 mm implants should be preferred.

In-vitro investigation of primary stability of orthodontic mini implants with different lengths using resonance frequency analysis

“…However, the results of this study are in contrast with study done by Singh AK et al, 5 Song et al 21 and Neinkemper et al 22 They concluded that primary stability of mini implants is not affected by changes in length of mini implant. These differences in results found may be due to variation in brands of implants used, 5 or changes in diameter along with length of implants studied.…”

Klinische Anwendung des digitalen Workflows am Beispiel von Mini-Implantaten

“…3). Da die Langzeitstabilität medianer und paramedianer Implantate als gleich einzustufen ist [14,15,23], wird im beschriebenen digitalen Workflow die paramediane Insertion bevorzugt.…”

“…Hierzu hat sich insbesondere die T-Zone im anterioren Gaumen des Oberkiefers als Insertionsregion medianer oder paramedianer Mini-Implantate etabliert [7][8][9] . In diesem Bereich gesetzte Mini-Implantate haben eine sehr gute Überlebensrate und verfügen über eine klinisch ausreichende und gut dokumentierte Langzeitstabilität [10][11][12][13][14][15].…”

The Use of Polymers to Enhance Post-Orthodontic Tooth Stability

“…Polymer science has been the most popular field of study due to its vast applicability in engineering modern materials for the enhancement of structural and functional qualities in clinical and biomedical applications. A variety of polymers have optimal qualities, and the chemical modification of these polymers can improve their cytocompatibility, bioactivity, and antibacterial capabilities [ 12 , 13 ]. Several studies have revealed that polymeric materials may be used in tissue engineering to reconstruct cartilage, bone, and heart valves, and as skin, hip, and dental implants [ 14 , 15 , 16 , 17 , 18 ].…”