Orthodontic retreatment of an adult woman with mandibular backward positioning and temporomandibular joint disorder:A case report

BACKGROUND The role of occlusal factors on the occurrence of temporomandibular joint disorders(TMDs)is still unclear and it is tricky for orthodontists to treat malocclusions in patients with TMDs.We report the case of the second orthodontic treatment of an adult female with Class II division 2 malocclusion associated with TMD.With the removal of anterior occlusal interference,TMD symptoms were alleviated and cone beam computed tomography(CBCT)images showed the bilateral condyles shifted forward.CASE SUMMARY This case report presented an orthodontic retreatment of an adult female with TMD and mandibular backward positioning based on CBCT examination and Joint Space Index(JSI)analysis.The left and right JSI values of-38.5 and-52.6 indicated that the position of bilateral condyles had posterior displacement.Ten years prior to this evaluation,she underwent orthodontic treatment resulting in the extraction of two upper premolars and one lower central incisor.The joint symptoms,including pain and sounds,were alleviated along with verified mandibular forward repositioning by extraction of another lower central incisor.CONCLUSION Mandibular backward positioning could be associated with TMD.JSI analysis based on CBCT is a convenient way to examine condylar positions quantitatively.

Application of Arthroscopic Technology in the Treatment of Traumatic Sports Ankle Arthritis

Objective:To analyze and explore the clinical value of arthroscopy in traumatic sports ankle arthritis.Methods:The study period was from June 2016 to June 2020.A selected sample of 25 patients with traumatic sports ankle arthritis in Qingyang People's Hospital were treated.All patients underwent arthroscopy and the specific treatment effects were analyzed.Results:Comparing the preoperative and postoperative ankle-hindfoot scores,the distance of talus advancement,modified Mcguire's ankle scoring system,and visual analog scale(VAS)pain scores,the postoperative results were significantly better than those of the preoperative(P<0.05).Conclusion:Arthroscopy in traumatic sports ankle arthritis has a significant effect,with minor trauma and rapid postoperative recovery which improves various discomfort symptoms.It is worthy of promotion and application.