Abnormal widening of the mandibular canal -A characteristic and valuable imaging phenomenon.

Abnormal widening of the mandibular canal (MC) is rarely observed on radiography. Nonetheless, as most of the current research on abnormal mandibular widening is limited to case reports and MCs have relatively deep and hidden positions, there are challenges in diagnosing and formulating treatment plans for patients with abnormal MC widening. To provide ideas for the differential diagnosis and treatment choices of the characteristic clinical sign, this study included patients with abnormal widening of the MC between July 2014 and October 2023.

Towards clinically applicable automated mandibular canal segmentation on CBCT.

Objectives: To develop a deep learning-based system for precise, robust, and fully automated segmentation of the mandibular canal on cone beam computed tomography (CBCT) images.

Methods: The system was developed on 536 CBCT scans (training set: 376, validation set: 80, testing set: 80) from one center and validated on an external dataset of 89 CBCT scans from 3 centers. Each scan was annotated using a multi-stage annotation method and refined by oral and maxillofacial radiologists.

Prediction of early recurrence of hepatocellular carcinoma after liver transplantation based on computed tomography radiomics nomogram.

Background: Early recurrence results in poor prognosis of patients with hepatocellular carcinoma (HCC) after liver transplantation (LT). This study aimed to explore the value of computed tomography (CT)-based radiomics nomogram in predicting early recurrence of patients with HCC after LT.

Methods: A cohort of 151 patients with HCC who underwent LT between December 2013 and July 2019 were retrospectively enrolled.

Lateral Lingual Foramina and Canals in the Mandible: CBCT Evaluation of 506 Patients in North China.

Objective: To assess the prevalence, location, diameter, course and anastomosis of the lateral lingual foramina (LLF) and canals (LLCs) in a northern Chinese population using CBCT.

Methods: CBCT images of 506 patients (181 male and 325 female, mean age 21.03 ± 8.

Root Canal Morphology of Mandibular Incisors with Double Root Canals in a Chinese Population.

Objective: To investigate the bilateral symmetry of double root canals, variation in root canal bifurcation and position of canal orifices in mandibular incisors in a Chinese population.

Methods: A total of 149 subjects with mandibular incisors with two canals were selected from 866 patients based on CBCT images and divided into three groups: group 1 (< 21 years), group 2 (21-40 years) and group 3 (> 40 years). The prevalence of bilateral symmetry of double root canals (type III and type V), the distance between the cementoenamel junction (CEJ) and the bifurcation (D1) and the distance between the two canal orifices (D2) were calculated and analysed.

Condylar repair and regeneration in adolescents/young adults with early-stage degenerative temporomandibular joint disease: A randomised controlled study.

Background: Anterior repositioning splint (ARS) can facilitate regenerative condylar remodelling.

Objective: To determine the effect of ARS on osseous condylar changes in adolescents/young adults with early-stage degenerative joint disease (DJD).

Methods: Sixty-nine patients with early-stage temporomandibular joint (TMJ) DJD based on the Diagnostic Criteria for Temporomandibular Disorders (DC/TMD) and cone beam computed tomography (CBCT) imaging were recruited and randomly allocated to two treatment groups: (a) conservative therapy with ARS and (b) conservative therapy without ARS.

[CT imaging features of diffuse tenosynovial giant cell tumor of temporomandibular joint].

Objective: This study aimed to investigate the characteristic features of CT images of diffuse tenosynovial giant cell tumor (D-TSGCT) from the temporomandibular joint (TMJ) to understand CT imaging diagnosis of the disease.

Methods: CT images and clinical information from 10 patients with D-TSGCT of TMJ were recruited for retrospective analysis from March 2013 to March 2017 in Peking University Hospital of Stomatology. All cases were treated by surgery and confirmed by pathology.

Metrical analysis of disc-condyle relation with different splint treatment positions in patients with TMJ disc displacement.

Objective: To evaluate the effect of bite positions characterizing different splint treatments (anterior repositioning and stabilization splints) on the disc-condyle relation in patients with TMJ disc displacement with reduction (DDwR), using magnetic resonance imaging (MRI).

Material And Methods: 37 patients, with a mean age of 18.8±4.

Sleep disturbance and psychologic distress: prevalence and risk indicators for temporomandibular disorders in a Chinese population.

Aims: To investigate the prevalence of sleep disturbance and psychologic distress in a population of Chinese patients with temporomandibular disorders (TMD) and whether sleep disturbance and psychologic distress are risk indicators for TMD.

Methods: Validated Chinese versions of the Self-Rating Scale of Sleep (SRSS) and Depression, Anxiety and Stress Scales-21 (DASS-21) were used to measure sleep disturbance and psychologic distress of 510 TMD patients with a mean (± SD) age of 31.06 ± 14.

[Cone-beam computed tomography analysis of root canal configuration of 4 674 mandibular anterior teeth].

Objective: To investigate the root canal configuration of mandibular anterior teeth with cone-beam computed tomography (CBCT).

Methods: The CBCT imaging data of 866 patients who visited Peking University School of Stomatology from October 2012 to July 2013 were inspected by an endodontist anda radiologists together. A total of 4 674 mandibular anterior teeth were involved.

Subarticular, cystlike lesion associated with avascular necrosis of the mandibular condyle: a case report.

Little is known about avascular necrosis of the mandibular condyle, which is necrosis of the epiphyseal or subarticular bone secondary to a diminished or disrupted blood supply in the absence of infection. We present a case of a large subarticular cystlike lesion that was found using cone-beam computed tomography (CBCT). There was an absence of osteoarthrosis, and the condylar articular surface was relatively intact.

Effect of laser acupuncture on disuse osteoarthritis: an ultrasound biomicroscopic study of patellar articular cartilage in rats.

To investigate the effect of laser acupuncture (LA) on disuse changes in articular cartilage using ultrasound biomicroscopy (UBM), Eighteen rats were randomly divided into the control group (C), the tail-suspended group (T), and the tail-suspended with LA treatment group (L). During 28-day suspension period, group L were treated with LA at acupoints on the left hindlimb while group T had a sham treatment. Ultrasound roughness index (URI), integrated reflection coefficient (IRC), integrated backscatter coefficient (IBC), cartilage thickness, and ultrasonographic score (US) of articular cartilage at patella were measured by using an ultrasound biomicroscopy system (UBS).

Condylar remodeling accompanying splint therapy: a cone-beam computerized tomography study of patients with temporomandibular joint disk displacement.

Objective: The aim of this study was to evaluate osseous changes accompanying anterior repositioning splint (ARS) therapy in patients with temporomandibular joint disk displacement.

Study Design: Cone-beam computerized tomography (CBCT) data of 36 patients with intermittent or permanent closed-lock were used; 23 patients with permanent closed-lock had their displaced disks physically reduced by mandibular manipulation before ARS therapy. CBCT was performed before and ≈ 6 months after ARS therapy.

Condylar subchondral formation of cortical bone in adolescents and young adults.

We investigated subchondral formation of cortical bone in the condyles of adolescents and young adults, and looked for age-related and sex-related differences in bony formation with the aid of cone-beam computed tomography data in 1438 subjects aged between 10 and 30 years. The scans were part of the hospital's clinical protocol for patients seeking orthodontic or orthognathic treatment. No patient had signs or symptoms of temporomandibular disorders.

Laser acupuncture and prevention of bone loss in tail-suspended rats.

Background: Skeletal unloading during spaceflight results in bone loss. This study investigated whether laser acupuncture could be an effective countermeasure to prevent unloading-induced bone loss in rats.

Methods: There were 18 rats that were randomly assigned into three groups: a control group, a tail-suspended group (TS), and a tail-suspended with laser acupuncture treatment group (TSA).

Ultrasound evaluation of site-specific effect of simulated microgravity on articular cartilage.

Space flight induces acute changes in normal physiology in response to the microgravity environment. Articular cartilage is subjected to high loads under a ground reaction force on Earth. The objectives of this study were to investigate the site dependence of morphological and ultrasonic parameters of articular cartilage and to examine the site-specific responses of articular cartilage to simulated microgravity using ultrasound biomicroscopy (UBM).

[Clustering analysis applied to near-infrared spectroscopy analysis of Chinese traditional medicine].

The present article discusses the clustering analysis used in the near-infrared (NIR) spectroscopy analysis of Chinese traditional medicines, which provides a new method for the classification of Chinese traditional medicines. Samples selected purposely in the authors' research to measure their absorption spectra in seconds by a multi-channel NIR spectrometer developed in the authors' lab were safrole, eucalypt oil, laurel oil, turpentine, clove oil and three samples of costmary oil from different suppliers. The spectra in the range of 0.

[Application of extracorporeal shock-wave therapy (ESWT) in delayed unions and non-unions].

Nonunion remains a major complication after skeletal trauma. In the last decade, extracorporeal shock wave therapy has become a common tool for the treatment of delayed unions or non-unions. With the help of a review of the literature, the current author gave an overview of indications, choices of devices, success rates and complications for ESWT in the treatment of non-unions.