Treatment of impacted or retained second molars with the miniscrew-supported pole technique: a prospective follow-up study

Lorente, Carmen (Universidad de Zaragoza) ; Lorente, Pedro ; Perez-Vela, Maria ; Esquinas, Cristina ; Lorente, Teresa (Universidad de Zaragoza)

Resumen: Background: Eruption disturbances of permanent molars are uncommon; however, it is important to treat them as soon as they are diagnosed. The main objective was to analyze the effectiveness of the “miniscrew-supported pole technique,” a surgically assisted orthodontic procedure to force the eruption of impacted/retained second molars (M2s) when there are indicators of complex molar inclusion. An observational prospective study was carried out during a 2-year period. Sociodemographic, clinical and low-dose scanner variables were taken at baseline (T0). Follow-up variables (T1) were the time between surgery and tooth eruption, radiographic measurements, debonding of buttons, failure rate of miniscrews and success rate of eruption.
Results: A total of 21 patients (mean age of 13.9 years) with 24 retained/impacted M2s were recruited; 13 molars were maxillary (54.2%) and 11 (45.8%) were mandibular. Six (25%) were impacted molars and 18 (75%) primarily retained. At T0, molar angulation was mesial in six molars (25%), distal in five molars (20.8%) and 13 molars were vertically positioned (54.2%). Infraocclusion degree was moderate in four (16.7%) molars and severe in 20 (83.3%). Only three (12.5%) third molars were removed due to lack of space. All M2s managed to erupt, achieving a success rate of 100%; however, two molars of the same patient did not achieve occlusion. The period of eruption after surgery was 126.8 (117.3) days. Anatomical radicular alteration was the only variable independently related to a longer time of treatment (p = 0.027).
Conclusions: The pole technique, using one mesial miniscrew and simple orthodontic mechanics, applies forces that succeed in erupting complicated retained/impacted M2s in a short period of time and with a low failure rate.

Idioma: Inglés

DOI: 10.1186/s40510-022-00432-5

Año: 2022

Publicado en: Progress in Orthodontics 23 (2022), 36 [11 pp.]
ISSN: 1723-7785

Factor impacto JCR: 4.8 (2022)

Categ. JCR: DENTISTRY, ORAL SURGERY & MEDICINE rank: 8 / 91 = 0.088 (2022) - Q1 - T1

Factor impacto CITESCORE: 6.4 - Dentistry (Q1)

Factor impacto SCIMAGO: 0.999 - Orthodontics (Q1)

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Area Anatom.Embriol.Humana (Dpto. Anatom.Histolog.Humanas)