Treatment and posttreatment changes following intrusion of maxillary posterior teeth with miniscrew implants for open bite correction.
10.4041/kjod.2008.38.1.31
- Author:
Han Ah LEE
1
;
Young Chel PARK
Author Information
1. Department of Orthodontics, college of Dentistry, Yonsei University, Korea. ypark@yuhs.ac
- Publication Type:Original Article
- Keywords:
Intrusion of maxillary posterior teeth;
Open-bite;
Miniscrew implant;
Stability
- MeSH:
Adult;
Bites and Stings;
Humans;
Male;
Open Bite;
Overbite;
Recurrence;
Retention (Psychology);
Tooth
- From:Korean Journal of Orthodontics
2008;38(1):31-40
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
OBJECTIVE: This study investigated the skeletal and dentoalveolar changes after intrusion of maxillary posterior teeth using miniscrew implants during the treatment and posttreatment period. METHOD: The subjects consisted of 11 adults (1 male, 10 females) whose open bites were treated by posterior teeth intrusion with miniscrew. The lateral cephalometric x-rays of pre-treatment, post-treatment, and the retention period were evaluated. RESULTS: The average intrusion of maxillary posterior teeth at the end of the treatment period was 2.22 mm (p < 0.001) and the average extrusion of maxillary posterior teeth at the end of the 17.4 month retention period was 0.23 mm (p = 0.359). The relapse rate was calculated at 10.36%. A decrease in overbite after the 17.4 month retention period was 0.99 mm (p < 0.05). The relapse rate was calculated at 18.10%. The skeletal changes and vertical height change of maxillary posterior teeth during the retention period was statistically insignificant, but there was a significant decrease in overbite (mean 0.99 mm, p < 0.05). The amount of intrusion and the overbite improvement from treatment significantly correlates to the degree of relapse. CONCLUSIONS: The results indicate that intrusion of the maxillary posterior teeth using miniscrews is an effective, non-surgical treatment modality which can reasonably be used to address adult open bite.
