Success rate of paramedian palatal implants in adolescent and adult orthodontic patients: a retrospective cohort study

Züger, Janine; Pandis, Nikolaos; Wallkamm, Beat; Grossen, J.; Katsaros, Christos

doi:10.1093/ejo/cjt003

Cited by 15 publications

(8 citation statements)

References 17 publications

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“…The results show that the position of the implants does not seem to affect the stability if the anterior limit of mini-implant insertion (third palatinal rugae) is respected [8,11]. Implants placed close to the third rugae or even further anterior may have a higher risk of penetrating the canalis incisivus-this might damage the nasopalatine bundle [30,31]. Unpublished data from a CBCT study with virtually inserted mini-implants shows that there is a penetration risk of 27.9% for median insertion.…”

Section: Discussionmentioning

confidence: 99%

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

2020

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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.

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Section: Discussionmentioning

confidence: 99%

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

2020

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“…According to Züger et al . , a slight increase in implant failure rates must be expected with increased patient age, despite an excellent implant success rate overall.…”

mentioning

confidence: 99%

Predicting primary stability of orthodontic mini‐implants, according to position, screw‐size, and bone quality, in the maxilla of aged patients: a cadaveric study

Möhlhenrich

Heussen

Winterhalder

et al. 2019

European J Oral Sciences

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This study aimed to evaluate the effect of implant size and bone condition on primary stability of orthodontic mini‐implants with a view to predict the primary stability before insertion. Four‐hundred and forty mini‐implants of two different diameters (2.0 and 2.3 mm) and lengths (7 and 12 mm) were inserted at 11 different positions in human cadaver maxillae. Before placement of mini‐implants, cone beam computed tomography (CBCT) scans were performed to measure bone density and cortical thickness and, after mini‐implant placement, implant stability quotient (ISQ) values were determined by resonance frequency analysis and cofactors were analyzed to determine their influence on the primary stability. Additionally, an equation was developed to predict the expected stability based on implant size and bone quality. Bone density varied between 433 (SD 122) and 587 (SD 249) Hounsfield units (HU), and cortical thickness varied between 0.49 (SD 0.42) and 0.98 (SD 0.60) mm. The lowest ISQ value, of 15.50 (SD 7.29) (bone density: 531 (SD 219) HU; cortical thickness: 0.65 (SD 0.58) mm), was found for a mini‐implant of 2.0 × 7 mm and the highest ISQ value, of 46.30 (SD 8.69) (bone density: 587 (SD 249) HU; cortical thickness: 0.98 (SD 0.60) mm), was found for a mini‐implant of 2.3 × 11 mm. Statistically significant influences of the cofactors on primary stability were demonstrated. To visualize the predictive power of the model, the observed values versus the predicted values of primary stability were compared and the model fit was represented by residual plots. The expected primary stability can be estimated by a linear regression model comprising the radiologically determined bone density, cortical thickness, implant length and diameter, and placement position.

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“…29 Als Insertionsregion mit einer sehr hohen Zuverlässigkeit hat sich hingegen der anteriore Gaumen erwiesen. 30 Zur Mesialisierung im Oberkiefer wird heute der Mesialslider als Standardgerät eingesetzt. 22,31 Als zweiter Vorteil neben der Verankerung gilt hier die körperliche Führung der Zähne, was insbesondere im Rahmen einer Alignertherapie essentiell erscheint.…”

Section: Mini-implantate Zur Verankerungunclassified

Mesialslider & Aligner für den Lückenschluss im Seitenzahnbereich

Wilmes

Drescher

Schupp³

et al. 2021

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Die Compliance-unabhängige Seitenzahn-Mesialisierung mittels Mini-Implantaten ist bei korrekter Indikationsstellung eine sehr gute Alternative zur Versorgung uni- oder bilateraler Lücken im Oberkiefer. Der Mesialslider zeigt eine ausgezeichnete körperliche Bewegung der Molaren. Verankerungsverluste, wie zum Beispiel eine Abweichung der Frontmitte bei asymmetrischem Lückenschluss oder eine Kippung der Frontzähne nach palatinal, können vermieden werden. Eine körperliche Zahnbewegung im Sinne der Mesialisierung von Molaren ist mit Alignern allein nicht möglich. Um eine körperliche Bewegung mit einer höheren Verlässlichkeit und Geschwindigkeit zu erreichen, gibt es die Möglichkeit, die Effektivität der Alignertherapie durch skelettal verankerte Geräte zu unterstützen.

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Success rate of paramedian palatal implants in adolescent and adult orthodontic patients: a retrospective cohort study

Cited by 15 publications

References 17 publications

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

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

Predicting primary stability of orthodontic mini‐implants, according to position, screw‐size, and bone quality, in the maxilla of aged patients: a cadaveric study

Mesialslider & Aligner für den Lückenschluss im Seitenzahnbereich

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