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Original Research

Open Access

Alveolar bone retention following treatment of dilacerated labial inversely impacted maxillary central incisors—a retrospective study

  • Leqi Zhang1
  • Yi Wang1
  • Zhiqi He2
  • Tingting Chen1
  • Gerald Voliere1
  • Rongdang Hu1,*,

1Department of Orthodontics, School and Hospital of Stomatology, Wenzhou Medical University, 325000 Wenzhou, Zhejiang, China

2Department of Preventive Dentistry, School and Hospital of Stomatology, Wenzhou Medical University, 325000 Wenzhou, Zhejiang, China

DOI: 10.22514/jocpd.2024.065 Vol.48,Issue 3,May 2024 pp.120-130

Submitted: 24 March 2023 Accepted: 30 October 2023

Published: 03 May 2024

*Corresponding Author(s): Rongdang Hu E-mail: hurongdang@wmu.edu.cn

Abstract

The root of late-dental-age labial inversely impacted maxillary central incisors (LIIMCIs) typically develops to severe dilacerated morphology. Therefore, reliable posttreatment periodontal estimates of orthodontic treatment prognosis would be critical to the treatment value of impacted incisors. This study aims to analyze further changes in dimensions of the alveolar bone following the closed-eruption treatment of late-dental-age dilacerated LIIMCIs. Cone beam computed tomography (CBCT) scanning data of 16 patients with unilateral dilacerated late-dental-age LIIMCIs were collected, including the pretreatment (T1) and at the 2.23 ± 0.78 years follow-up stage (T2) respectively. Patients underwent closed-eruption treatments to bring the impacted incisor into the dental arch. Dolphin imaging software was used to measure alveolar bone height labially, palatally, and proximally to the site at T1 and T2, as well as alveolar bone thicknesses at 0, 2, 4, 6 and 8 mm below the initial measurement plane (IMP). The alveolar bone heights on the impacted and contralateral sides increased from T1 to T2 (p < 0.05). Alveolar bone growth on both sides had no significant difference. In T2, the mean values of labial and distal alveolar heights on the contralateral sides were greater than on the impacted sides (p < 0.05). The mean values of total alveolar bone thicknesses on the impacted sides in T1 were significantly smaller than those on the contralateral sides in IMP-0, 2, 4, 6, 8 (p < 0.05). The total thicknesses on the impacted sides in T2 increased and were significantly greater than on the contralateral sides (p < 0.05), except for the thickness in IMP-0. The closed-eruption treatment of dilacerated late-dental-age LIIMCIs results in no significant changes to alveolar bone height, except on the labial and distal sides, with increased alveolar bone thickness, suggesting that this approach may be viable first choice therapy for non-extraction orthodontic cases.


Keywords

Impacted tooth; Dilaceration; Incisors; Alveolar bone; Prognostic value; Cone beam computed tomography


Cite and Share

Leqi Zhang,Yi Wang,Zhiqi He,Tingting Chen,Gerald Voliere,Rongdang Hu. Alveolar bone retention following treatment of dilacerated labial inversely impacted maxillary central incisors—a retrospective study. Journal of Clinical Pediatric Dentistry. 2024. 48(3);120-130.

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