IPR treatment and attachments design in clear aligner therapy and risk of open gingival embrasures in adults

Published: 09 January 2023 Progress in Orthodontics volume  24, Article number: 1 (2023) Cite this article Abstract Background The incidence of open gingival embrasures (OGE) in patients after fixed appliance treatment is relatively high, while there are no detailed reports on patients after clear aligner therapy. Also, no clinical studies with la rge sample size have investigated whether interproximal enamel reduction (IPR) can actually avoid OGE. The purpose of this study was to determine the prevalence of OGE in adults after clear aligner therapy and to investigate the risk of OGE associated with IPR treatment and attachment design, focusi ng on the amount and distribution in mandibular anterior teeth. Methods Pre-treatment and post-treatment intraoral frontal photographs of 225 non-extraction patients were evaluated retrospectively for the occurrence and severity of OGE. The amount of IPR and the number of attachments in the anterio r teeth from subjects after screening were recorded according to the first version of clear aligner software (Clincheck, San Jose, USA) and clinical medical documents. Logistic regression analysis was performed to identify the factors contributing to OGE. Results The incidence of OGE in non-extract ion patients after clear therapy between maxillary and mandibular central incisors was 25.7% and 40.3%, respectively. IPR was not associated with the occurrence of OGE but was associated with severity (P 

Source: Dental Technology Blog - January 16, 2023 Category: Dentistry Source Type: news