Chinese Journal of Oral Implantology

Expert consensus on complications of sinus floor elevation: displacement of dental implant into the maxillary sinus (first edition)

Chinese Society of Oral Implantology

2022, 27(5): 264-268. DOI: 10.12337/zgkqzzxzz.2022.10.001

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Dental implantation at the posterior maxillary region involving the sinus has become a routine treatment for the edentulous patients. However, due to medical or pathogenic factors, various postoperative complications may occur, among which the relatively rare but serious complication is the displacement of dental implant into the maxillary sinus. At present, there is still lack of guideline or consensus on the management of this complication at home and abroad. Therefore, the Chinese Society of Oral Implantology organized experts from different domestic universities to discuss and draft this consensus from the aspects of pathogenesis, clinical manifestations, treatment plans and prevention methods, aiming to provide clinicians with practical measures for the prevention and treatment of the complication of implant displacement into the maxillary sinus.

Expert consensus on bone grafting materials for maxillary sinus floor elevation: autogenous bone

Chinese Society of Oral Implantology

2022, 27(5): 269-273. DOI: 10.12337/zgkqzzxzz.2022.10.002

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Autogenous bone is derived from the patient's own body and has osteogenic, osteoinductive and osteoconductive properties without the risk of immunological rejection or disease transmission. For this reason, autogenous bone has long been regarded as the "gold standard" of bone grafting materials. This article summarizes the biological properties of bone grafting materials, the harvest of autogenous bone, the osteogenesis process and the clinical efficacy of autogenous bone graft in the maxillary sinus floor, and the limitations of autogenous bone, based on evidence-based principles, and proposes a consensus view based on the clinical experience of some Chinese experts.

Application of robots in the field of dental implantology

Chen Jiang

2022, 27(5): 274-279. DOI: 10.12337/zgkqzzxzz.2022.10.003

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Recently, with the development of digital technology in the field of dental implantology, from static computer-assisted implant surgery to dynamic navigation, and then to today's dental implant robot system, the accuracy of implants has been a hot topic in the field of dental implantology. After clinical application, on the basis of expounding the classification, workflow, and application status of oral implant robots, this paper also discusses the shortcomings and thinks about the coming era of dental implant robots, in order to provide a reference for further application and development of oral implant robot in the future.

Fluorinated porcine-derived bone substitute: from concept to practice

Liu Quan, Chen Shoucheng, Chen Zhuofan

2022, 27(5): 280-284. DOI: 10.12337/zgkqzzxzz.2022.10.004

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Biological calcium phosphate-based bone substitutes have been widely used in the rehabilitation of bone defects in implant dentistry, due to their great biocompatibility and osteoconductivity. It has become an important optimizing strategy for bone regeneration materials through trace elements incorporation and controlled release to promote osteogenesis by regulating the regenerative microenvironment. In recent years, a series of studies have shown that fluorinated porcine bone substitute has good mechanical properties and the capacity of fluorine slow-release which could promote bone regeneration by activating the Wnt/β-catenin signaling pathway and regulating the immune microenvironment. Such an in vitro effect of fluorinated porcine bone substitute has been evidently proven in a variety of subsequent studies in vivo. This article summarized the research progress of the fluorinated porcine bone substitute so as to provide a reference for related basic research and clinical application.

Exploration and consideration on clinical solutions for complex alveolar bone defects

Li Jinmeng, Li Xiaoban, Zhang Jian

2022, 27(5): 285-291. DOI: 10.12337/zgkqzzxzz.2022.10.005

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Surgeons and patients find it challenging to reconstruct the complex alveolar bone defects clinically. For complex alveolar bone defects, surgeons are responsible for making the most appropriate surgical plan, which requires them to fully understand the indications and technical key points of the existing bone augmentation techniques, and then choose an appropriate method to complete the alveolar bone defect reconstruction and the following implant placement. Based on clinical experience and literature review, the author summarizes the classification of alveolar bone defects, and focuses on the most commonly used bone augmentation techniques during clinical practice, such as Onlay bone grafting, split bone block technique, sausage technique, GBR technique with non-resorbable membrane, and GBR technique using titanium mesh. This article aims to provide a reference for the reconstruction of complex alveolar bone defects for dental implant specialists.

Analysis of the use of digital surgical guides in dental implant restoration

Pang Liping, Xu Mingyan, Guo Weizhong, Zuo Qiliang

2022, 27(5): 292-298. DOI: 10.12337/zgkqzzxzz.2022.10.006

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Objective To investigate the effect of digital guided technology on the accuracy of oral implant restoration. Methods 33 patients with oral implant restorations were selected. The digital guided technology restoration was Group A, free-handed implant restoration was Group B . There are 41 implants in group A, and 48 implants in Group B. cone beam computed tomography (CBCT) was used to record and compare the deviation values of the two methods in implant neck, root, depth and angle. Results The implant neck deviation in Group A [(1.50±0.49) mm] was less than that in Group B [(2.15±0.57) mm] (P<0.05).The root deviation in Group A [(1.56±0.56) mm] was less than that in Group B [(2.19±0.50) mm], and the difference was comparable (P<0.05).The depth deviation in Group A [(1.40±0.40) mm] was less than that in Group B [(1.80±0.43) mm], and the difference was comparable (P< 0.05). The angle deviation in Group A (3.39°±0.62°) was less than that in Group B (3.92°±0.55°), and the difference was comparable (P<0.05). There was a statistically significant difference in the anterior and posterior regions using digital guided surgery (P<0.05). There was a statistically significant difference between the implant neck deviation and the root deviation when comparing the three brands of implants using the digital guided technology (P<0.05); while there was no statistically significant difference between the depth deviation and the angle deviation when comparing the three brands of implants using the digital guided technology (P>0.05). Conclusion Using digital technology for dental implant restoration can optimize the precision of implant and improve the quality of restoration.

A novel guided implant placement solution for patients treated with orthodontic-prosthodontic-implant combined therapy : a case report

Wang Zixiao, Xia Shuchi, Wang Qing

2022, 27(5): 299-303. DOI: 10.12337/zgkqzzxzz.2022.10.007

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A meta-analysis of interimplant distance on peri-implant bone resorption

Zhang Qihang, Gong Jiaming, Gou Ping, Yu Jiaying, Bo Lei, Yu Zhanhai

2022, 27(5): 304-311. DOI: 10.12337/zgkqzzxzz.2022.10.008

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Objective To systematically evaluate the effect of interimplant distance (IID) on peri-implant bone resorption by systematic evaluation and meta-analysis. Methods Databases in PubMed, Embase, Cochrane Library, Web of Science, CNKI and Wanfang Date until March 2022 were searched to identify animal studies or population studies that comparing peri-implant bone resorption at different IID, and citation indexes were carried out for the critical literatures. Results A total of 9 studies were included, including 7 animal studies and 2 clinical trials. Using 3 mm as the standard IID, meta-analysis indicated that there was no statistically significant difference in marginal bone resorption between IID=2 mm and IID=3 mm of animal studies [MD=0.05, 95%CI (-0.10,0.19), P=0.54]; Clinical trials showed slightly greater marginal bone resorption at IID=2 mm than at IID=3 mm, which is not statistically significant [MD=0.11, 95%CI (-0.09,0.31), P=0.27]. There was no statistically significant difference in vertical bone resorption at IID=2 mm or 3 mm [MD=-0.10,95%CI (-0.27,0.07), P=0.24]. Conclusion sBased on the limited evidence, performance was similar for IID=2 mm compared to IID=3 mm. There is still a need to refine the assessment groups, improve the assessment methods and further confirm the relationship between IID and peri-implant bone resorption.

Current status of the use of polyurethane artificial bone in vitro studies of dental implants

Teng Weiwei, Su Tianyue, Wang Qi, Shu Qianyi, Zhou Libo, Hou Yuze

2022, 27(5): 312-316. DOI: 10.12337/zgkqzzxzz.2022.09.009

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With the widespread use of dental implants,dental implants,orthodontic anchorage screws,jaw fracture fixation devices and other oral implants in clinical practice, the biomechanical properties of oral implants and the accuracy of implant placement have become one of the focuses in stomatology. These need to be clarified through a large number of in vivo and vitro experimental studies. However, in vitro study needs experimental models, and the establishment of standard experimental models is the basis for in vitro study. Therefore, it is necessary to find or establish experimental models that meet the standards. At present, there is no authoritative standard for in vitro studies of implants in the field of stomatology. The experimental models reported in the literature include gypsum, acrylic, and polyurethane. Among them, polyurethanes have been widely used in in vitro studies because of their similar properties to those of bone. Therefore, this paper summarizes the application of polyurethane experimental models in in vitro researches of oral implants, its remaining advantages, disadvantages and future prospects, hoping to provide a reference for the selection of in vitro models for future oral implant research.

Progress in the study of sandblasted large-grit acid-etched hydrophilic surface implants to promote osseointegration in areas of bone defects

Qian Yinjie, Si Misi

2022, 27(5): 317-321. DOI: 10.12337/zgkqzzxzz.2022.10.010

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Rapid and stable osseointegration is an important guarantee for the success of the implant. One of the most important factors affecting osseointegration is the implant surface. Sandblasted large-grit acid-etched hydrophilic surface implants can promote early osseointegration in areas of adequate bone mass, however, their role in areas of bone defects is unclear. This article presents a review of the studies of sandblasted large-grit acid-etched hydrophilic surface implants used in areas of bone defects, which can be used to guide clinical practice.

The decision-making principles of sinus floor elevation

Pi Xuemin, Liu Qian, Chen Deping, Ren Bin, Pan Hong, Su Yucheng

2022, 27(5): 322-326. DOI: 10.12337/zgkqzzxzz.2022.10.011

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