Journal of Shanghai Jiao Tong University (Medical Science) >

2022 , Vol. 42 >Issue 2: 173 - 177

DOI: https://doi.org/10.3969/j.issn.1674-8115.2022.02.006

Clinical research

Difference in recurrence rates after temporomandibular joint disc repositioning surgery with miniscrew anchor at different developmental stages in adolescents

  • Xuehong WANG ,
  • Xuzhuo CHEN ,
  • Yi MAO ,
  • Da SHEN ,
  • Shanyong ZHANG
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  • 1.Department of Oral and Maxillofacial Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; College of Stomatology, Shanghai Jiao Tong University; National Center for Stomatology; National Clinical Research Center for Oral Disease; Shanghai Key Laboratory of Stomatology, Shanghai 200011, China
    2.Department of Stomatology, Suzhou Municipal Hospital, Nanjing Medical University, Suzhou 215000, China
SHEN Da, E-mail: 37735375@qq.com.
ZHANG Shanyong, E-mail: zhangshanyong@126.com

Received date: 2021-08-31

  Online published: 2022-03-17

Supported by

Clinical Diagnosis and Treatment Research Project of Key Diseases, Suzhou, 2020(LCZX202011);Clinical Research Program of Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine(JYLJ202105)

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Abstract

Objective

·Based on magnetic resonance imaging (MRI), adolescents with anterior disc displacement (ADD) of temporomandibular joint treated by temporomandibular joint disc repositioning surgery with miniscrew anchor were studied retrospectively to analyze the difference of postoperative recurrence rate among adolescents at different developmental stages.

Methods

·Adolescent patients (12 years old≤age≤18 years old ) who received disc repositioning from January 2015 to January 2020 in the Department of Oral and Maxillofacial Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine were selected and the patients were divided into 2 groups defined by the age of 15. MRIs during at least 6 months follow-up were used to evaluate changes in the disc position and condylar bone. During follow-up, ADD without reduction was considered relapse. The position, length of disc and height of condylar were analyzed quantitatively by modified three-circle method on MRI images and compared by statistical analysis via Software SPSS 25.0. Difference of recurrence rates between the 2 groups was compared by using chi-square test. T test was performed for the difference of condylar growth height between the 2 groups.

Results

·Totally 90 cases were included, including 64 females and 26 males, with the average age of (14.2±1.2) years and follow-up interval of (16.0±12.0) months. Postoperative MRIs showed that all the discs were repositioned. During follow-up, 96.4% (54/56) of the discs in group A (>15 years old) were still in position, whereas 3.6% (2/56) of the discs had relapsed anteriorly. In group B (≤15 years old), 85.2% (75/88) of the discs were still in position, whereas 14.8% (13/88) of the discs had relapsed anteriorly, which was higher than that in group A (P=0.032). The condylar height in group A increased by (1.33±1.29) mm compared with that in group B [(1.79±1.14) mm)]. The condylar height in group B increased more during follow-ups (P=0.036). The degree of anterior disc displacement in group B was greater than that in group A (P=0.002), but there was no significant difference in preoperative disc length between the 2 groups (P=0.585).

Conclusion

·For adolescent patients who received temporomandibular joint disc repositioning surgery with miniscrew anchor, experiencing rapid growth might be a factor affecting the effect of the operation. The postoperative effect of repositioning surgery with miniscrew anchor may be affected by the rapid growth and development of condyle.

Key words： adolescent; temporomandibular joint disc repositioning with miniscrew anchor; condylar height; magnetic resonance imaging (MRI); recurrence

Cite this article

Xuehong WANG , Xuzhuo CHEN , Yi MAO , Da SHEN , Shanyong ZHANG . Difference in recurrence rates after temporomandibular joint disc repositioning surgery with miniscrew anchor at different developmental stages in adolescents[J]. Journal of Shanghai Jiao Tong University (Medical Science), 2022 , 42(2) : 173 -177 . DOI: 10.3969/j.issn.1674-8115.2022.02.006

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