Outcomes of Treatment With Manipulative Reduction Combine With the Disc-condyle Repositioning Splint in Acute Anterior Disc Displacement Without Reduction.

ABSTRACT: In this report, the authors describe a case of the acute anterior disc displacement without reduction treated by manipulative reduction combined with the disc-condyle repositioning splint to improve the limited mouth opening and relieve the pain, including diagnostic images and treatment performed.

Clinical Effects of the Combination of Rhytidectomy and Temporomandibular Joint Disc Repositioning Surgery.

OBJECTIVE: This study aims to investigate the clinical effects of the combination of rhytidectomy and temporomandibular joint (TMJ) disc repositioning surgery in internal derangement (ID) stage IV-V and facial aging patients. METHODS: Eighteen facial aging with bilateral ID IV-V patients were enrolled in this study. All of them had undergone temporomandibular disc repositioning surgery and rhytidectomy by the same surgeon (Yao Min Zhu). Pre-/post-surgical clinical manifestations, facial photography, radiographic data were recorded and analyzed, as well as doctor, patient, third-party evaluation of postsurgical facial appearance satisfaction. RESULTS: The average age of 18 female patients was 52.9. The average of presurgical visual analog pain scale score was 5.94, ranged from 4 to 8. After 6 months, the average of postsurgical visual analog pain scale score was 0.28, ranged from 0 to 1 ( P   >  0.05). The average maximal mouth opening of presurgical and postsurgical was 2.19 and 3.29 cm, ranged from 1.2 to 2.8 cm and 3.0 to 3.5 cm, respectively ( P  < 0.05). Postoperative magnetic resonance imaging showed the location of the bilateral TMJ discs directly above the mandibular condyle. The satisfaction rate of doctors, patients and third-party with facial appearance was 95% to 98%, 96% to 99% and 96% to 99%, respectively, with an average of 95.72%, 98.11%, and 97.50%. CONCLUSIONS: For patients with bilateral ID IV-V and facial aging, the combination of disc repositioning surgery and rhytidectomy is a very feasible procedure to treat TMJ disorders and improve patients' facial appearance and satisfaction.

Outcomes of treatment with genioplasty and temporomandibular joint anchorage surgery.

BACKGROUND: Anterior Disc Displacement without Reduction (ADDwoR) in adolescence can result in condylar resorption which produces mandibular retrusion/deviation (MR/D) in adulthood. This study aims to analyze the therapeutic effect of simultaneous genioplasty and temporomandibular joint (TMJ) anchorage surgery on ADDwoR with MR/D patients. METHODS: During 2016-2018, ADDwoR with MR/D cases were included and underwent TMJ anchorage surgery and genioplasty guided by digital design. Pre-/Post-surgical clinical manifestations, facial photography, radiographic data, facial shape satisfaction of clinicians/patients/third-party were recorded and analyzed. RESULTS: A total of 32 cases (52 joints) were included. The average age was 24.09. Ratio of male/female was 4/28. Visual analog pain scale (VAS) score pre-/post-surgical ranged from 3 to 9 and 0-3, with an average of 6.03 and 1.18 (p < 0.01). Maximal mouth opening pre-/post-surgical ranged from 16 to 33 mm and 33-40 mm, with an average of 22.43 mm and 36.46 mm (p < 0.01). MRI was completed and showed stable disc reduction without recurrence 1 year postoperatively. MR/D was corrected and a better face shape was obtained. The satisfaction rate of clinicians, patients and third-parties was 92.375%, 94.156% and 94.218%, with an average of 93.583%. CONCLUSION: For ADDwoR with MR/D patients, simultaneous TMJ anchorage surgery and genioplasty can improve TMJ symptoms/functions, correct facial appearance, and enhance the degree of satisfaction. The postoperative effect is stable, safe and reliable, which is worthy of clinical promotion.

A nanostructured anti-biofilm surface widens the efficacy against spindle-shaped and chain-forming rod-like bacteria.

Current control of pathogenic bacteria at all biomaterial interfaces is poorly attuned to a broad range of disease-causing pathogens. Leading antimicrobial surface functionalization strategies with antimicrobial peptides (AMPs), defensins, have not shown their promised efficacy. One of the main problems is the lack of stability and swift clearance from the surface. Surface nanotopography bearing sharp protrusions is a non-chemical solution that is intrinsically stable and long-lasting. Previously, the geometrically ordered arrays of nanotipped spines repelled or rapidly ruptured bacteria that come into contact. The killing properties so far work on cocci and rod-like bacteria, but there is no validation of the efficacy of protrusional surfaces on pathogenic bacteria with different sizes and morphologies, thus broadening the utility of such surfaces to cover increasingly more disease entities. Here, we report a synthetic analogue of nanotipped spines with a pyramidal shape that show great effectiveness on species of bacteria with strongly contrasting shapes and sizes. To highlight this phenomenon in the field of dental applications where selective bacterial control is vital to the clinical success of biomaterial functions, we modified the poly(methyl)-methacrylate (PMMA) texture and tested it against Streptococcus mutans, Enterococcus faecalis, Porphyromonas gingivalis, and Fusobacterium nucleatum. These nanopyramids performed effectively at levels well above those of normal and roughened PMMA biomaterials for dentistry and a model material for general use in medicine and disease transmission in hospital environments.

Synovial Chondromatosis of the Temporomandibular Joint: A clinical and arthroscopic study of 16 cases.

OBJECTIVES: Present and overview the clinical finding, management and arthroscopic study of Synovial Chondromatosis (SC) cases in Temporomandibular Joint (TMJ) treated by our team. STUDY DESIGN: During year 2008-2018, 16 TMJ SC cases were treated and reviewed. The clinical manifestations, radiographic data, arthroscopic study and pathologic findings were recorded and analyzed. RESULTS: Average age of first visit was 32.68. The ratio of male/female was 2/14, right/left was 7/9. The most common symptoms were pain, continuous crepitus and limited mouth opening (LMO). All cases were examined by computed tomography (CT) and magnetic resonance imaging (MRI) preoperative and proved by pathology postoperative. The diagnostic rates of CT and MRI were 12.5% and 93.75% respectively. 1 case could not be detected by both, but by arthroscopy. Particles in all cases occurred in the upper joint cavity and were all removed by arthroscopic technique. No recurrence was found after 3 years follow-up. CONCLUSIONS: MRI and arthroscopic technique could be the first choice in the diagnosis and treatment of SC. Most cases were in stage 3 of the disease at the first visit. Low recurrence rate may be attributed to the improvement of intra-articular environment after surgery. Larger sample sizes are needed for further study.

[Investigation of related risk factors of temporomandibular disorders in 109 patients].

PURPOSE: To investigate the related risk factors of temporomandibular disorders(TMD), and to provide evidences for clinical prevention. METHODS: One hundred and nine TMD patients were included in the study as case group, while 109 people with no TMJ symptoms and signs were selected randomly as control group. All subjects fulfilled questionaires. Logistics regression analysis was used to analyze the data with SPSS 22.0 software package. RESULTS: Females patients were more common than males, with 20~29 age group accounting for 44%. The proportions of patients with habits of bruxism or clenching, unilateral mastication and maxillofacial injure history were significantly greater than those of control group (P<0.05). The proportions of patients with life stress and habits of stay-up late, chewing hard food and orthodontic treatment history showed no significant difference compared with the control group (P>0.05). CONCLUSIONS: TMD has a higher prevalence in female than in male, with a peak incidence in 20-29 age group. Habits of bruxism or clenching, unilateral mastication and maxillofacial injury history may be risk factors of TMD, while life stress, habits of stay-up late, chewing hard food and orthodontic treatments show no significant correlation with TMD.