Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2022 Jul 1;92(4):463-470.
doi: 10.2319/102921-797.1.

A comparative assessment of the amount and rate of orthodontic space closure toward a healed vs recent lower premolar extraction site

Elham S Abu Alhaija, Rami A Al Shayeb, Susan Al-Khateeb, Hasan O Daher, Saba O Daher

A comparative assessment of the amount and rate of orthodontic space closure toward a healed vs recent lower premolar extraction site

Elham S Abu Alhaija et al. Angle Orthod. .

Abstract

Objectives: To investigate and compare the amount and rate of space closure and tooth tipping during orthodontic space closure toward a recent vs healed first premolar extraction site.

Materials and methods: The mandibular arches of 23 patients were included. Treatment plans included lower first premolar extractions. After reaching 0.019 × 0.025-inch stainless-steel archwires (SSAW), patients were subdivided into two groups (Group 1: space closure was carried out toward a healed first premolar extraction space and Group 2: space closure was carried out immediately after first premolar extraction). Elastomeric power chain from second molar to second molar was used to close lower extraction spaces. The following time points were defined: T1: just before space closure; T2-T4: 1-3 months after initial space closure. Records consisted of dental study models. The amount and rate of extraction space closure were evaluated at each time point.

Results: In Group 1 (healed socket), a total amount of 1.98 mm (coronally) and 1.75 mm (gingivally) of space closure was achieved. The rate of space closure was 0.66 mm/month coronally and 0.58 mm/month gingivally. In Group 2 (recent socket), the total amount of space closure was 3.02 mm coronally and 2.68 mm gingivally. The rate of space closure was 1.01 mm/month coronally and 0.89 mm/month gingivally. Differences between the two groups were significant (P < .01). Tipping of adjacent teeth during space closure was similar in both groups (P > .05).

Conclusions: In the lower arch, the amount and rate of space closure toward a recent extraction site were higher than that toward a healed extraction socket with similar tipping of teeth in both groups.

Keywords: Healed; Lower arch; Recent; Space closure, Tipping.

PubMed Disclaimer

Figures

Figure 1.
Figure 1.
Extraction space width measurements; CC indicates canine coronally; CG, canine gingivally; PC, premolar coronally; PG, premolar gingivally.
Figure 2.
Figure 2.
CONSORT flowchart.
Figure 3.
Figure 3.
Extraction space width at the different time points.
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

References

    1. Fisher MA, Wenger RM, Hans MG. Pretreatment characteristics associated with orthodontic treatment duration. Am J Orthod Dentofacial Orthop . 2010;137:178–186. - PubMed
    1. Mavreas D, Athanasiou AE. Factors affecting the duration of orthodontic treatment: a systematic review. Eur J Orthod . 2008;30:386–395. - PubMed
    1. Moresca R. Orthodontic treatment time: can it be shortened? Dental Press J Orthod . 2018;23:90–105. - PMC - PubMed
    1. Tsichlaki A, Chin SY, Pandis N, Fleming PS. How long does treatment with fixed orthodontic appliances last? A systematic review. Am J Orthod Dentofacial Orthop . 2016;149(3):308–318. - PubMed
    1. Abbas NH, Sabet NE, Hassan IT. Evaluation of corticotomy facilitated orthodontics and piezocision in rapid canine retraction. Am J Orthod Dentofacial Orthop . 2016;149:473–480. - PubMed

Substances