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Does the time-point of orthodontic space closure initiation after tooth extraction affect the incidence of gingival cleft development? A randomized controlled clinical trial.


ABSTRACT: BACKGROUND:Gingival clefts (GCs) 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 because of orthodontic reasons, one premolar, chosen at random, was extracted 8 weeks before space closure initiation ("delayed movement," DM), whereas the contralateral premolar was extracted 1 week before ("early movement," EM) ("treatment group"). Presence or 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, GCs 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 ?1 mm per month) developed a GC in >90% of the cases already after 3 months. "Slow movers" developed a GC in 25% and 70% after 3 months and final evaluation, 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."

SUBMITTER: Bertl K 

PROVIDER: S-EPMC7317775 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature

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Does the time-point of orthodontic space closure initiation after tooth extraction affect the incidence of gingival cleft development? A randomized controlled clinical trial.

Bertl Kristina K   Neuner Hemma H   Meran Antonia A   Bertl Michael H MH   Reich Ilse I   Nemec Michael M   Bruckmann Corinna C   Stavropoulos Andreas A   Bantleon Hans-Peter HP  

Journal of periodontology 20191017 5


<h4>Background</h4>Gingival clefts (GCs) 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.<h4>Methods</h4>In 25 patients requiring bilateral premolar extraction because of orthodontic reasons, one premolar, chosen at random, was extracted 8 weeks before space closure initiation ("delayed movement," DM), wher  ...[more]

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