Editorial Type:
Article Category: Case Report
 | 
Online Publication Date: 24 Oct 2022

Closing Post-orthodontic Spaces Between Anterior Teeth Using Sequential 3D-printed Direct Composite Injection Guides

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Page Range: 612 – 619
DOI: 10.2341/21-183-T
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SUMMARY

Restorative treatment of anterior teeth is sometimes required to improve esthetic and functional occlusal outcomes of orthodontic therapy. This case report presents a direct, noninvasive approach to close post-orthodontic gaps in anterior teeth using a 3D-printed composite resin injection guide with a full digital workflow. The composite injection technique using 3D-printed guides is a full digital workflow that can transfer the design precisely, save chair time, and simplify the direct composite restoration procedure.

Copyright: 2022
Figure 1.
Figure 1.

Pretreatment condition. (A) Pretreatment intraoral photograph. (B) View of the distal space of right maxillary lateral incisor. (C) View of the distal space of left maxillary lateral incisor.

Figure 2.
Figure 2.

(A), (B), and (C): Digital wax-up.

Figure 3.
Figure 3.

(A), (B): Design of the right-side guide. (C), (D): Design of the left-side guide.

Figure 4.
Figure 4.

(A), (B): Composite injection guides were fabricated by a 3D printer. (C), (D): Guides are placed in the cast. (E), (F) The two guides.

Figure 5.
Figure 5.

Injection of highly filled composite through tubes of the 3D-printed guide.

Figure 6.
Figure 6.

(A), (B): Guide was removed by opening the buckle. (C), (D): Excess composite was removed using a 12 scalpel.

Figure 7.
Figure 7.

Views of the finished restorations immediately after polishing.

Figure 8.
Figure 8.

(A:) Infiltrate resin was applied to the target teeth. (B): Light cure for 40 s for perfect polymerization. (C): Regular polishing procedure after the excess material was removed.

Figure 9.
Figure 9.

Clinical appearance after 1 week was excellent, and white spot lesions were eliminated.

Figure 10.
Figure 10.

The final restoration and the digital wax-up were compared in software.

Contributor Notes

*Corresponding author: 14 Renmin South Road, 3rd section, Chengdu, Sichuan 610041, China; e-mail: YHYmechanics@163.com

Clinical Relevance

The direct composite restorative technique is a well-accepted, noninvasive approach for closing post-orthodontic spaces. However, the freehand direct buildup of composite restorations is often time-consuming and technique-sensitive. This case report presents a simplified direct composite injection technique with a full digital workflow to ensure predictable treatment outcomes.

Accepted: 05 Feb 2022
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