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. 2024 Jun 10;29(2):e2423253.
doi: 10.1590/2177-6709.29.2.e2423253.oar. eCollection 2024.

The efficiency of a customized distalizer with Variety SP® screws anchored on palatal miniscrews for upper molar distalization

Davit Poghosyan  1 , Davit Grigoryan  1 , Diana Ter-Poghosyan  1 , Gokulraj Gunaveerasekaran  1 , Swasa Dara  1 , Hrant Ter-Poghosyan  1
Affiliations

The efficiency of a customized distalizer with Variety SP® screws anchored on palatal miniscrews for upper molar distalization

Davit Poghosyan et al. Dental Press J Orthod. .

Abstract
in English, Portuguese

Objective: To assess the effectiveness of a customized distalizer with Variety SP® screws anchored on palatal miniscrews for upper molar distalization.

Methods: Seventeen patients aged between 12.5 and 24 years underwent distalization with a customized distalizer. Lateral cephalogram and cast analysis were performed before and after distalization. Linear and angular parameters of the upper first molar, first premolar, and central incisor were assessed.

Results: Distalization with the force passing near the center of resistance (CRes) of the upper first molars resulted in distal movement, with minimal distal tipping (2.8 ± 0.45°, p< 0.05). However, distalization passing occlusal to the CRes led to greater distal tipping (13.6 ± 1.63°, p< 0.05). Statistically significant spontaneous distal tipping and distal movement of the upper first premolars occurred, with a mean of 6.2 ± 1.24° (p< 0.05) and 0.68 ± 0.34 mm (p< 0.05), respectively. The positional change of the upper central incisors presented a mean of -0.23 ± 0.1 mm (p> 0.05) and 2.65 ± 1.1° (p< 0.05). Upper first molar intrusion was statistically significant, with a mean of 0.88 ± 0.2 mm (p< 0.05). Upper right and left first molars rotation towards palatal midline presented mean of 4.1 ± 0.19° (p< 0.05) and 3.4 ± 0.1° (p< 0.05), respectively. Additionally, the distance between upper right and left first molars increased significantly, with a mean of 2.54 ± 0.01 mm (p< 0.05).

Conclusion: The study successfully demonstrated the efficiency of molar distalization without anchorage loss using a customized distalizer anchored on palatal miniscrews.

Objetivo:: Avaliar a eficácia de um distalizador personalizado com parafusos Variety SP® ancorado em mini-implantes palatinos para distalização de molares superiores.

Métodos:: Dezessete pacientes com idade entre 12,5 e 24 anos foram submetidos à distalização com o distalizador customizado. Análises das radiografias cefalométricas laterais e dos modelos de gesso foram realizadas antes e depois da distalização. Foram avaliados parâmetros lineares e angulares dos primeiros molares, primeiros pré-molares e incisivos centrais superiores.

Resultados:: A distalização com a força passando perto do centro de resistência (CRes) dos primeiros molares superiores resultou em distalização com inclinação mínima (2,8 ± 0,45°, p< 0,05). Entretanto, a distalização passando oclusal ao CRes levou a uma maior inclinação para distal (13,6 ± 1,63°, p< 0,05). Ocorreu inclinação distal espontânea e movimento distal estatisticamente significativo dos primeiros pré-molares superiores, com média de 6,2 ± 1,24° (p< 0,05) e 0,68 ± 0,34 mm (p< 0,05), respectivamente. A mudança de posicionamento dos incisivos centrais superiores apresentou média de -0,23 ± 0,1 mm (p> 0,05) e 2,65 ± 1,1° (p< 0,05). A intrusão dos primeiros molares superiores foi estatisticamente significativa, com média de 0,88 ± 0,2 mm (p< 0,05). A rotação dos primeiros molares superiores direito e esquerdo em direção à linha média palatina apresentou média de 4,1 ± 0,19° (p< 0,05) e 3,4 ± 0,1° (p< 0,05), respectivamente. Além disso, a distância entre os primeiros molares superiores direito e esquerdo aumentou significativamente, com média de 2,54 ± 0,01 mm (p< 0,05).

Conclusão:: O estudo demonstrou com sucesso a eficiência da distalização de molares sem perda de ancoragem utilizando um distalizador customizado ancorado em mini-implantes palatinos.

PubMed Disclaimer

Conflict of interest statement

The authors report no commercial, proprietary or financial interest in the products or companies described in this article.

Figures

Figure 1:
Figure 1:. Bonded distalizer, with Variety SP® screws.
Figure 2:
Figure 2:. Variety SP® screw, 12.0 mm in length.
Figure 3:
Figure 3:. Lateral cephalogram tracing.
Figure 4:
Figure 4:. An example of lateral cephalogram tracings superimposition (T1 = black line, T2 = green line).
Figure 5:
Figure 5:. Intraoral photographs before (T1) and after distalization (T2).
Figure 6:
Figure 6:. An example of cast analysis.
See this image and copyright information in PMC

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