Abstract
Background
Gingival clefts (GC) develop frequently during orthodontic space closure and may compromise the treatment outcome. This study assessed whether the time‐point of orthodontic space closure initiation, after permanent tooth extraction, affects the incidence of GC.
Methods
In 25 patients requiring bilateral premolar extraction due to orthodontic reasons, one premolar, chosen at random, was extracted 8 weeks before space closure initiation (“delayed movement”, DM), while the contralateral premolar was extracted one week before (“early movement”, EM) (“treatment group”). Presence/absence of GC after 3 and 6 months (“time‐point”) was recorded and any association with various parameters (i.e., treatment group, time‐point, gender, jaw, craniofacial growth, gingival biotype, buccal bone dehiscence after extraction, space closure) was statistically assessed.
Results
Twenty‐one patients contributing with 26 jaws were finally included in the analysis. Overall, GC were frequent after 3 (DM: 53.9%; EM: 69.2%) and 6 months (DM: 76.9%; EM: 88.5%). EM (p = 0.014) and larger space closure within the study period (p = 0.001) resulted in a significantly higher incidence of GC. Further, there was a tendency for GC development in the presence of buccal bone dehiscence (p = 0.052) and thin gingival biotype (p = 0.054). “Fast movers” (herein cases with a tooth movement ≥ 1mm per month) developed a GC in > 90% of the cases already after 3 months. “Slow movers” developed a GC only in 25 and 70% after 3m and FE, respectively.
Conclusions
GC development is a frequent finding during orthodontic space closure and seems to occur more frequently with early tooth movement initiation and in “fast movers”.
This article is protected by copyright. All rights reserved
from
https://aap.onlinelibrary.wiley.com/doi/abs/10.1002/JPER.19-0376?af=R
No comments:
Post a Comment