Int J Stomatol

Int J Stomatol ›› 2025, Vol. 52 ›› Issue (6): 798-805.doi: 10.7518/gjkq.2025089

• Case Report • Previous Articles     Next Articles

A case report of anterior diastema closure using direct composite restorations

Huili Ning(),Meijuan Cai,Fangli Tong()   

  1. Dept. of Endodontics, Panfu Branch of Stomatological Hospital, School of Stomatology, Southern Medical University, Guangzhou 510280, China
  • Received:2024-09-15 Revised:2024-10-27 Online:2025-11-01 Published:2025-10-23
  • Contact: Fangli Tong E-mail:10357939@qq.com;550852380@qq.com

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Abstract:

Diastemas between the anterior teeth are often considered a major aesthetic problem. In most cases, the treatment of these conditions involves direct composite resin restoration, veneers, crowns, orthodontic treatment, and a multidisciplinary approach. This article is a case report of a patient with diastema in the maxillary anterior teeth, corrected with direct composite resin with injection molding technique and a matrix with preformed anatomical contour, resulting in patient satisfaction.

Key words: anterior diastema, direct composite restoration, injection molding technique, preformed polyester film matrix with anatomical form

CLC Number: 

  • R781.05

TrendMD: 

Fig 1

Preoperative smile photograph and intraoral view"

Fig 2

Preoperative view of the maxillary anterior teeth and diastema"

Fig 3

X-ray examination before operation"

Fig 4

Therapeutic process"

Fig 5

Views of the restorations immediately after matrix removed"

Fig 6

Views of the finished restorations immediately after polishing"

Fig 7

Review after 1 week"

Fig 8

Review after 1 year"

Fig 9

The change of diastema and interdental papilla between central incisors"

Fig 10

Smile photographes of preoperative and postoperative"

Tab 1

Advantages and disadvantages of composite restorations, veneers, crowns and secondary orthodontic treatment in anterior diastema closure"

治疗方法优点缺点
树脂直接修复

1）微创；

2）易调改；

3）就诊次数少；

4）费用低

1）牙冠宽度增加（中切牙宽长比增大）；

2）固位相对差；

3）树脂老化；

4）边缘着色、继发龋等风险

贴面或全冠间接修复瓷美学性能及耐用性高

1）牙冠宽度增加（中切牙宽长比增大）；

2）备牙风险；

3）费用高；

4）医师和技术的技术依赖性

二次正畸治疗

1）无修复体；

2）综合解决多个美学问题

1）治疗周期长；

2）费用高；

3）牙根吸收、牙槽骨吸收等风险

Tab 2

Comparison of injection molding technique combined with a matrix with preformed anatomical contour and conventional layers technique in closing anterior diastema"

比较项目复合树脂注射技术结合预成型的解剖聚酯薄膜成型片修复术传统复合树脂直接修复术
操作过程比色、测量间隙大小、去除牙菌斑、酸蚀、粘接、放置成型片、注射树脂并固化、修型抛光等取模、制作蜡型、制作硅胶导板、比色、去除牙菌斑、酸蚀、粘接、放置硅胶导板修复腭侧、放置成型片、树脂分层放置修复邻面及唇面、修型抛光等
成型片选择预成型的解剖聚酯薄膜成型片传统聚乙烯成型片/金属成型片
树脂选择大块树脂流体或膏体（单色）美学树脂（双色或多色）
树脂放置方法一次性注射成型（可达4 mm）树脂分层塑型（不超过2 mm）
固化方式粘接剂、流体树脂和膏体树脂混合固化黏结剂单独固化、树脂分层固化
间隙分配和确定接触点位置利用成型片的放置分配间隙和确定接触点利用硅胶导板分配间隙和确定接触点位置
修复后间隙存在微小间隙相对更小
修复体邻面颈部轮廓微弧形近似直线形
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