Purpose::The main aim is to provide clinical reference for the application of mini suture anchor in the reduction and fixation of displaced temporomandibular joint(TMJ)disc with intracapsular condylar fracture.Methods...Purpose::The main aim is to provide clinical reference for the application of mini suture anchor in the reduction and fixation of displaced temporomandibular joint(TMJ)disc with intracapsular condylar fracture.Methods::From October 2018 to October 2019,21 patients(31 sides)with intracapsular condylar fractures and articular disc displacement from West China Hospital of Stomatology,Sichuan University were included.The selection criteria were:(1)mandibular condylar fractures accompanied by displacement of the TMJ disc,confirmed by clinical examination,CT scan and other auxiliary examinations;(2)indication for surgical treatment;(3)no surgical contraindications;(4)no previous history of surgery in the operative area;(5)no facial nerve injury before the surgery;(6)informed consent to participate in the research program and(7)complete data.Patients without surgical treatment were excluded.The employed patients were followed up at 1,3,6 and 12 months after operation.Outcomes were assessed by success rate of operation,TMJ function and radiological examination results at 3 months after operation.Data were expressed as number and percent and analyzed using SPSS 19.0.Results::All the surgical procedures were completed successfully and all the articular discs were firmly attached to the condyles.The articular disc sufficiently covered the condylar head after the fixation.The fixation remained stable when the mandible was moved in each direction by the surgeons.No complications occurred.The functions of the TMJ were well-recovered postoperatively in most cases.CT scan revealed that the screws were completely embedded in the bone without loosening or displacement.Conclusion::Mini suture anchor can provide satisfactory stabilization for the reduced articular disc and also promote the recovery of TMJ functions.展开更多
In this manuscript, the authors have studied the Disc Displacement (DD) status of patients with acute Closed Lock (CL) to determine differences between DD with Reduction (DDwR) and DD without Reduction (DDwoR). Among ...In this manuscript, the authors have studied the Disc Displacement (DD) status of patients with acute Closed Lock (CL) to determine differences between DD with Reduction (DDwR) and DD without Reduction (DDwoR). Among the acute CL patients who visited our hospital within 2 weeks of the onset of CL, we studied 10 patients whose CL was released (DDwR) and 13 patients whose CL was not released (DDwoR). The DDwoR group was significantly older than the DDwR group. Although the mouth opening distance was significantly greater in the DDwoR group than in the DDwR group, the two groups were identical in the duration of CL. Sagittal MRI images showed no significant differences between the two groups in disc length and disc thickness (anterior band, intermediate zone, and posterior band). Multisection sagittal and coronal images identified lateral DD in 7 of the 10 patients in the DDwR group, although no specific direction of the DD was observed in the DDwoR group. Furthermore, deformation of the medial disc was common in the DDwoR group but uncommon in the DDwR group.展开更多
Temporomandibular joint (TMJ) is sensitive to loading and mechanical stress that provokes morphological changes produced by the impact in the occlusal plane. Here, this impact is evaluated in TMJ articular disc and ar...Temporomandibular joint (TMJ) is sensitive to loading and mechanical stress that provokes morphological changes produced by the impact in the occlusal plane. Here, this impact is evaluated in TMJ articular disc and articular cartilage using an in vivo model of unilateral occlusal plane impact and by analysis of serial tissue sections stained with Hematoxylin-Eosin (H-E) or with Masson trichrome technique. Thus, six groups of 5 Wistar rats (200 - 250 g) are subjected to biomechanical dental stimulation by placing unilateral resin occlusal interference, or unilateral tooth wear made by upper left molars artificial mechanical devastation (1 control and 2 experimental groups for each treatment). Each treatment is evaluated two times at 1 and 15 days post-treatment. By H-E staining, control groups show chondrocytes arrangement as several cord cell groups in comparison with the experimental groups, which show an arrangement in one cord cell along of articular disc. However, this yields no significant difference (p < 0.05) in cell number between control and experimental groups. In contrast, in articular cartilage chondrocytes are random distributed along the superficial zone in control groups, while in experimental groups cell-free regions are observed in superficial zone. An image Blue hue analysis for trichrome stain is performed to quantify collagen;this shows a significant collagen decrease (p < 0.05) in almost all experimental groups compared with the controls. A degenerative process biomechanically induced by unilateral occlusal plane modification, causes cell and tissue changes on the TMJ structures that remain the degenerative changes observed in early osteoarthritis.展开更多
Posterior disc displacement of the temporomandibular joint is rare. We present a unique treatment method and magnetic resonance (MR) images of this condition. The patient was a 43-year-old male with a chief complaint ...Posterior disc displacement of the temporomandibular joint is rare. We present a unique treatment method and magnetic resonance (MR) images of this condition. The patient was a 43-year-old male with a chief complaint of abnormal occlusion. Regarding the present status, there was no occlusion on the right side. No temporomandibular joint pain, myalgia, or clicking were observed while mouth opening. On MR images, the posterior disc displacement without reduction on the right was observed and it was assumed that occlusal abnormality was due to this condition. We treated him with the following methods. After injection into the superior articular cavity with 2% lidocaine, a sodium hyaluronate preparation was injected followed by intermaxillary traction applied using rubber. The recovery of occlusion was confirmed in follow-up at 5 days after treatment. In the 13th days, the intermaxillary traction was removed. On MR images, the right disc condition was changed to anterior disc displacement with reduction. We consider our treatment methods are effective for this clinical condition.展开更多
目的:通过Meta分析,比较手法复位联合咬合板治疗颞下颌关节盘不可复性前移位患者疼痛与最大张口度疗效是否优于仅进行手法或仅进行咬合板治疗。方法:计算机检索Web of Science、PubMed、Cochrane Library、维普(VIP)、中国知网(CNKI)、...目的:通过Meta分析,比较手法复位联合咬合板治疗颞下颌关节盘不可复性前移位患者疼痛与最大张口度疗效是否优于仅进行手法或仅进行咬合板治疗。方法:计算机检索Web of Science、PubMed、Cochrane Library、维普(VIP)、中国知网(CNKI)、万方中手法复位联合咬合板治疗颞下颌关节盘不可复性前移位的随机对照试验(RCTs)文献,并参考Cochrane手册评估文献质量,运用RevMan5.4软件分析结局指标。结果:本研究纳入6个RCTs,患者共计393例。Meta分析结果显示,对于颞下颌关节盘不可复性前移位患者,观察组进行手法复位联合咬合板治疗,在降低疼痛评分[SMD=-0.34,95%CI(-0.54,-0.13),P=0.001]与改善最大张口度[SMD=0.51,95%CI(0.31,0.71),P<0.00001]方面疗效均比对照组较优,差异具有统计学意义(P<0.05)。结论:手法复位联合咬合板治疗改善颞下颌关节盘不可复性前移位患者疼痛和最大张口度疗效优于单独使用手法复位或单独佩戴咬合板。展开更多
基金The National Natural Science Foundation of China(81670951)the Applied and Basic Research Programs of Sichuan Science and Technology Commission(2020YJ0278).
文摘Purpose::The main aim is to provide clinical reference for the application of mini suture anchor in the reduction and fixation of displaced temporomandibular joint(TMJ)disc with intracapsular condylar fracture.Methods::From October 2018 to October 2019,21 patients(31 sides)with intracapsular condylar fractures and articular disc displacement from West China Hospital of Stomatology,Sichuan University were included.The selection criteria were:(1)mandibular condylar fractures accompanied by displacement of the TMJ disc,confirmed by clinical examination,CT scan and other auxiliary examinations;(2)indication for surgical treatment;(3)no surgical contraindications;(4)no previous history of surgery in the operative area;(5)no facial nerve injury before the surgery;(6)informed consent to participate in the research program and(7)complete data.Patients without surgical treatment were excluded.The employed patients were followed up at 1,3,6 and 12 months after operation.Outcomes were assessed by success rate of operation,TMJ function and radiological examination results at 3 months after operation.Data were expressed as number and percent and analyzed using SPSS 19.0.Results::All the surgical procedures were completed successfully and all the articular discs were firmly attached to the condyles.The articular disc sufficiently covered the condylar head after the fixation.The fixation remained stable when the mandible was moved in each direction by the surgeons.No complications occurred.The functions of the TMJ were well-recovered postoperatively in most cases.CT scan revealed that the screws were completely embedded in the bone without loosening or displacement.Conclusion::Mini suture anchor can provide satisfactory stabilization for the reduced articular disc and also promote the recovery of TMJ functions.
文摘In this manuscript, the authors have studied the Disc Displacement (DD) status of patients with acute Closed Lock (CL) to determine differences between DD with Reduction (DDwR) and DD without Reduction (DDwoR). Among the acute CL patients who visited our hospital within 2 weeks of the onset of CL, we studied 10 patients whose CL was released (DDwR) and 13 patients whose CL was not released (DDwoR). The DDwoR group was significantly older than the DDwR group. Although the mouth opening distance was significantly greater in the DDwoR group than in the DDwR group, the two groups were identical in the duration of CL. Sagittal MRI images showed no significant differences between the two groups in disc length and disc thickness (anterior band, intermediate zone, and posterior band). Multisection sagittal and coronal images identified lateral DD in 7 of the 10 patients in the DDwR group, although no specific direction of the DD was observed in the DDwoR group. Furthermore, deformation of the medial disc was common in the DDwoR group but uncommon in the DDwR group.
文摘Temporomandibular joint (TMJ) is sensitive to loading and mechanical stress that provokes morphological changes produced by the impact in the occlusal plane. Here, this impact is evaluated in TMJ articular disc and articular cartilage using an in vivo model of unilateral occlusal plane impact and by analysis of serial tissue sections stained with Hematoxylin-Eosin (H-E) or with Masson trichrome technique. Thus, six groups of 5 Wistar rats (200 - 250 g) are subjected to biomechanical dental stimulation by placing unilateral resin occlusal interference, or unilateral tooth wear made by upper left molars artificial mechanical devastation (1 control and 2 experimental groups for each treatment). Each treatment is evaluated two times at 1 and 15 days post-treatment. By H-E staining, control groups show chondrocytes arrangement as several cord cell groups in comparison with the experimental groups, which show an arrangement in one cord cell along of articular disc. However, this yields no significant difference (p < 0.05) in cell number between control and experimental groups. In contrast, in articular cartilage chondrocytes are random distributed along the superficial zone in control groups, while in experimental groups cell-free regions are observed in superficial zone. An image Blue hue analysis for trichrome stain is performed to quantify collagen;this shows a significant collagen decrease (p < 0.05) in almost all experimental groups compared with the controls. A degenerative process biomechanically induced by unilateral occlusal plane modification, causes cell and tissue changes on the TMJ structures that remain the degenerative changes observed in early osteoarthritis.
文摘Posterior disc displacement of the temporomandibular joint is rare. We present a unique treatment method and magnetic resonance (MR) images of this condition. The patient was a 43-year-old male with a chief complaint of abnormal occlusion. Regarding the present status, there was no occlusion on the right side. No temporomandibular joint pain, myalgia, or clicking were observed while mouth opening. On MR images, the posterior disc displacement without reduction on the right was observed and it was assumed that occlusal abnormality was due to this condition. We treated him with the following methods. After injection into the superior articular cavity with 2% lidocaine, a sodium hyaluronate preparation was injected followed by intermaxillary traction applied using rubber. The recovery of occlusion was confirmed in follow-up at 5 days after treatment. In the 13th days, the intermaxillary traction was removed. On MR images, the right disc condition was changed to anterior disc displacement with reduction. We consider our treatment methods are effective for this clinical condition.
文摘目的:通过Meta分析,比较手法复位联合咬合板治疗颞下颌关节盘不可复性前移位患者疼痛与最大张口度疗效是否优于仅进行手法或仅进行咬合板治疗。方法:计算机检索Web of Science、PubMed、Cochrane Library、维普(VIP)、中国知网(CNKI)、万方中手法复位联合咬合板治疗颞下颌关节盘不可复性前移位的随机对照试验(RCTs)文献,并参考Cochrane手册评估文献质量,运用RevMan5.4软件分析结局指标。结果:本研究纳入6个RCTs,患者共计393例。Meta分析结果显示,对于颞下颌关节盘不可复性前移位患者,观察组进行手法复位联合咬合板治疗,在降低疼痛评分[SMD=-0.34,95%CI(-0.54,-0.13),P=0.001]与改善最大张口度[SMD=0.51,95%CI(0.31,0.71),P<0.00001]方面疗效均比对照组较优,差异具有统计学意义(P<0.05)。结论:手法复位联合咬合板治疗改善颞下颌关节盘不可复性前移位患者疼痛和最大张口度疗效优于单独使用手法复位或单独佩戴咬合板。
