中华口腔医学杂志最新文献

In fixed prosthodontics, clear exposure of the preparation margin is the prerequisite for obtaining accurate digital impressions and improving the marginal fit of restorations. To resolve the issues associated with the cord retraction technique, such as pain, acute injury, and prolonged procedural time, this study proposes a new technology for intraoral digital impression taking with pneumatic gingival retraction. The new scanning head blows a high-speed airflow that instantaneously separates the free gingiva, locally exposing the subgingival preparation margin. Combined with the farthest point preservation stitching algorithm based on the distance from the normal vector and high-speed laser scanning photography, it achieves global preparation edge data and gingival reconstruction, realizing painless, non-invasive, and efficient precise acquisition of the preparation margin. Using this new technique, a patient with a full porcelain crown restoration on a posterior tooth was treated. The digital impression revealed a clear margin of the preparation, and the crown made from this data has a good marginal fit.

Oral lichen planus (OLP), as a chronic inflammatory disease of oral mucosa, cannot be completely cured at present. OLP can develop into oral squamous cell carcinoma and reduce the life quality of patients. The development of high-quality evidence-based strategies for OLP clinical management can effectively alleviate the clinical symptoms and reduce the risk of cancerization, thus to improve the life quality of patients. However, there is a wide variety of outcomes and a lack of uniform standards in previous OLP clinical intervention studies. Therefore, evidence-based analysis of relevant studies cannot be conducted to provide more convincing guidance for clinical diagnosis and treatment. To reduce the heterogeneity of clinical intervention studies, form a data pool for meta-analysis, and provide higher quality evidence-based OLP clinical management protocols, the World Workshop on Oral Medicine Ⅷ identified a core outcome set (COS) for OLP in three steps from March 2022 to January 2023. This article introduces the process of COS formulation, interprets OLP COS, and puts forward the advantages and drawback of OLP COS in this paper. We encourage researchers to use this COS in their future OLP clinical studies for improving the clinical significance and evidence-based value of studies.

Temporomandibular disorders (TMD) are a heterogeneous group of diseases that affect the temporomandibular joint, chewing muscle system, dental occlusion, and even various structures throughout the body, with significant characteristics of biological-psychological-social pattern. TMD related chronic pain, as the most important clinical symptom, can result in negative emotions seriously affecting patients' quality of life and physical and mental health. Although a variety of therapies have been previously reported to treat TMD related chronic pain, there is a lack of widely recognized therapies. Professor Jason W Busse (from Michael G DeGroote National Pain Centre, McMaster University, Hamilton ON, Canada) took the lead and collaborated with multiple internationally renowned schools/hospitals of stomatology to develop an international consensus on the management of chronic pain associated with TMD, a clinical practice guideline, which took two years and was published in December 15th, 2023 in a global top journal of clinical research The British Medical Journal. This clinical practice guideline explored the comparative effectiveness of available therapies for chronic pain associated with TMD, conditionally recommended the specific intervention for different treatment or pain relief, proposed a comprehensive, agreed, and standardized clinical practice guideline. This present article describes the methodology and key elements of the clinical practice guideline to help clinicians fully understand and appropriately apply this guidance, which could provide the references for clinical practice of TMD associated chronic pain in China.

Replacement of the temporomandibular joint (RTJ) has undergone decades of technological improvements and is now an important treatment for end-stage temporomandibular joint (TMJ) disease. The main complications of RTJ include aseptic loosening, heterotopic ossification, postsurgical infection, hypersensitivity reaction, prosthesis loosening or malposition, nerve injury and severe bleeding. Improvement in clinical technique is now the key to resolving complications. In the future, improvements in prosthetic materials may be an important development for newer iterations. With the development and popularity of TMJ surgical techniques, prosthesis-related complications will increasingly come into clinical view. This article provides a systematic review of the complications of RTJ prosthesis replacement and the measures to deal with them, and looks forward to the direction of the development of this field from the perspective of reducing complications, so as to provide a reference for clinical work.

During the complete denture restoration process, accurate impression making is a crucial step for achieving good denture retention. With the increasing popularity of intraoral scanning technology in fixed restoration, the use of intraoral scanning technology in complete denture restoration for edentulous jaw has also been developed. This article systematically reviews the research progress and application of intraoral scanning of edentulous soft tissue, focusing on difficulties in intraoral scanning of edentulous jaws, scanning accuracy, clinical application effects, as well as precautions involved. The aim is to provide references for clinical application.

Apical periodontitis (AP) is an inflammatory disease that occurs in the periapical tissue. The treatments of AP mainly include root canal therapy and endodontic surgery which promote the repair of periapical bone tissue by infections clearing and controlling inside or outside the root canal. The evaluation on efficacies of root canal therapy and endodontic surgery is mainly based on clinical and periapical imaging examinations, and the prognosis relates to multiple factors. The systemic factors of patients can directly or indirectly affect the healing of apical periodontitis. The present review summarizes the influence factors, including age, smoking habits, systemic diseases and systemic medication on the prognosis of apical periodontitis treatment, in order to increase the attention of clinicians.

Temporomandibular joint (TMJ) surgery in China, as an important part of oral and maxillofacial surgery, has made significant progress in the past 20 years. It is mainly reflected in the reduction of TMJ dislocated joint disc, prosthetic total TMJ reconstruction, and the treatment of adult condylar fracture. There are major controversies about the surgical methods and indications for the reduction of the dislocated/displacement joint disc of the temporomandibular disorders.