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30 November 2024, Volume 17 Issue 6 Previous Issue   

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Progress in the study of functional and anatomical characteristics of mandibular molar teeth and the application of alveolar ridge preservation in mandibular molar region. ZHANG Hao-yun, SHI Yu-tong, HU Wen-jie 2024, 17(6): 641-645.  DOI: 10.19538/j.kq.2024.06.001 Abstract ( )   The prevalence of periodontal disease is very high in China，and periodontitis is the main cause of tooth loss in adults. Implant treatment has now become an important prosthodontic choice for patients with tooth loss due to periodontitis. Dentists focus on avoiding the risk and reducing the difficulty and biological complications of dental implant treatment. Since alveolar ridge preservation effectively reduces alveolar bone resorption after tooth extraction and creates better conditions for implant treatment，this technique has gradually become a hot spot in clinical research. As mandibular molars are closely related to the mandibular canal，dentists should pay attention to the local anatomical structure during implant treatment to avoid damaging the inferior alveolar vessels and nerves. However，mandibular molars with severe periodontitis often have bone insufficiency after extraction，which makes prosthodontic-guided implant treatment more difficult and risky. Therefore，this review analyses the functional and anatomical characteristics of mandibular molars，the characteristics of periodontitis in mandibular molars，and the clinical effectiveness and significance of alveolar ridge preservation for mandibular molars，to provide a reference for clinical decision-making.

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Progress in the study of anatomical characteristics of maxillary molar teeth and the application of alveolar ridge preservation in maxillary molar region. WEI Yi-ping, XU Tao, ZHANG Hao-yun, HU Wen-jie 2024, 17(6): 646-650.  DOI: 10.19538/j.kq.2024.06.002 Abstract ( )   Maxillary molars are prone to periodontitis and adjacent to maxillary sinus. Maxillary sinus lifting procedure is often required to compensate for the lack of vertical bone in implant therapy. The technology of alveolar ridge preservation is the focus of current research. Simutaneous alveolar ridge preservation during maxillary molar extraction can reduce crestal bone resorption and sinus pneumatization，thus reducing the complexity of implant surgery. In this article，the anatomical characteristics of maxillary molar region，morphological changes in extraction sockets after natural healing and the effect of alveolar ridge preservation were reviewed，so as to provide reference for clinical decision-making.

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Analysis of the soft and hard tissue contour changes after natural healing of extraction sockets and alveolar ridge preservation. LI Li-man, ZHANG Hao-yun, HU Wen-jie, XU Tao, ZHAO Li-ping 2024, 17(6): 651-656.  DOI: 10.19538/j.kq.2024.06.003 Abstract ( )   Good soft and hard tissue contours are essential to the ideal three-dimensional positioning of implants and the long-term success of implant restorations. Alveolar ridge preservation is a surgical procedure that achieves soft and hard tissue preservation or augmentation following tooth extraction，and is an effective means to preventively improve implantation conditions. The aim of this review is to discuss the soft and hard tissue contour changes after natural healing of the extraction socket，the effect of alveolar ridge preservation on maintaining contours，and the main methods for obtaining the three-dimensional soft and hard tissue profiles，in order to provide theoretical support and practical reference for the clinical application of alveolar ridge preservation.

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Evaluation of the effect of implant restoration after alveolar ridge preservation. ZHAO Li-ping, WEI Yi-ping, HU Wen-jie, XU Tao 2024, 17(6): 657-662.  DOI: 10.19538/j.kq.2024.06.004 Abstract ( )   The preservation or reconstruction of alveolar ridge and gingival anatomical morphology is a prerequisite for achieving healthy, functional and aesthetic outcomes. Alveolar ridge preservation has been introduced to maintain the hard and soft tissue level and contour，and to simplify the future procedure of implantation repair. Its most important clinical value lies in the outcomes of implantation repair following alveolar ridge preservation. This article reviews the outcomes of implantation repair after alveolar ridge preservation in order to provide a foundation for further clinical application.