Evaluation of soft tissue healing after intracapsular condylar fracture by MRI

China Journal of Oral and Maxillofacial Surgery ›› 2015, Vol. 13 ›› Issue (2): 155-160.

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Evaluation of soft tissue healing after intracapsular condylar fracture by MRI

CAI Yi-hua¹, HE Dong-mei¹, YANG Chi¹, RAO Jian², DONG Min-Jun³

1.Department of Oral Surgery, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; Shanghai Key Laboratory of Stomatology. Shanghai 200011;
2.Department of Stomatology, Ningdu People’s Hospital. Ningdu 342800, Jiangxi Province;
3.Department of Radiology, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine. Shanghai 200011, China

Received:2014-05-20 Revised:2014-09-29 Online:2015-03-20 Published:2015-04-23
Supported by:
Supported by Research Fund of Science and Technology Committee of Shanghai Municipality (08DZ2271100), Program for Innovative Research Team of Shanghai Municipal Education Commission, Scientific Research Foundation of Ministry of Education for Returned Overseas Scholars and Research Fund of Ministry of Health of China(201002017)

Abstract

Abstract: PURPOSE: To classify soft tissue injury and evaluate its healing after intracapsular condylar fracture (ICF) of the mandible. METHODS: Patients who had less than 1 week and more than 3 months of follow-up after ICF from 2010 to 2013 were evaluated by magnetic resonance imaging (MRI) in our department. Types of soft tissue injury were classified as disc displacement with the fracture fragment, the ramus stump was or not covered by disc, status of the retrodiscal tissue (with or without tear) , tears in capsule and effusion in the joint. RESULTS: Twelve patients of 17 joints were evaluated. After immediate injury, MRI showed 17 (100%) discs displaced anteriorly and interiorly with the fractured fragment; ten (58.8%) discs covering the mandibular ramus, whereas 7 (41.2%) were not; eleven (64.7%) tears in retrodiscal tissue; seven (41.2%) tears in capsule and all 17 (100%) had joint effusions. At follow-up, seventeen (100%) had new bone formation on the condylar surface; fifteen (88.2%) had incrassation and remodeling in retrodiscal tissue, two (11.8%) had osteoid tissue hyperplasia with disc tears; six (35.3%) had joint effusions absorbed. CONCLUSIONS: Types of soft tissue injury after ICF are disc displaced anteriorly and medially with the fractured fragment, elongation of retrodiscal tissue with or without tears, tears in capsular and joint effusion. The main healing modes are retrodiscal tissue incrassation and condylar surface new bone formation.

Key words: Intracapsular condylar fracture, Soft tissue injury, MRI

CLC Number:

R782.4

CAI Yi-hua, HE Dong-mei, YANG Chi, RAO Jian, DONG Min-Jun. Evaluation of soft tissue healing after intracapsular condylar fracture by MRI[J]. China Journal of Oral and Maxillofacial Surgery, 2015, 13(2): 155-160.

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Evaluation of soft tissue healing after intracapsular condylar fracture by MRI

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