Prognosis of primary and secondary insertions of orthodontic miniscrews: What we have learned from 500 implants.
Am J Orthod Dentofacial Orthop
; 152(2): 224-231, 2017 Aug.
Article
en En
| MEDLINE
| ID: mdl-28760284
ABSTRACT
INTRODUCTION:
Although the success of using orthodontic miniscrews for primary insertion has been reported in the literature, few studies have followed up on secondary insertions after failure of the first insertion. In this study, we investigated not only the primary but also secondary success rates of miniscrews and considered the risk factors influencing their stability.METHODS:
Five hundred miniscrews were inserted for orthodontic anchorage in 240 patients. Ninety-eight miniscrews lacked stability; thus, 77 of these were removed and reinserted. We calculated and compared the primary and secondary success rates of insertion. Moreover, we investigated which clinical parameters affected the stability of miniscrews.RESULTS:
The success rate of secondary insertion (44.2%) was significantly lower than that of primary insertion (80.4%). The screw length and jaw receiving the insertion were significantly associated with the stability of miniscrews. The 8.0-mm miniscrews were significantly more stable than the 6.0-mm miniscrews, and the success rate for insertions into the maxilla was significantly higher than that for the mandible.CONCLUSIONS:
Secondary insertions lack stability; therefore, clinicians should be aware of the reduced success rate of reinsertion and know the risk factors to avoid failure of secondary insertions.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Tornillos Óseos
/
Métodos de Anclaje en Ortodoncia
Tipo de estudio:
Prognostic_studies
/
Risk_factors_studies
Límite:
Adult
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
Am J Orthod Dentofacial Orthop
Asunto de la revista:
ODONTOLOGIA
/
ORTODONTIA
Año:
2017
Tipo del documento:
Article