Chinese Journal of Oral Implantology

Biological implant-the future direction in oral implantology——Written interview of Wang Songling by the Chinese Journal of Oral Implantology

Editorial Board of Chinese Journal of Oral Implantology

2022, 27(2): 67-70. DOI: 10.12337/zgkqzzxzz.2022.04.001

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Expert consensus on complications of sinus floor elevation: sinus infection and sinus graft infection (first edition)

Chinese Society of Oral Implantology

2022, 27(2): 71-74. DOI: 10.12337/zgkqzzxzz.2022.04.002

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Sinus floor elevation is a well-established technique but with high technical sensitivity. Postoperative infection including sinus infection and graft infection is one of the major complication, which could cause severe problems though the incidence is not high. Bone augmentation procedures in the posterior maxilla increase dramatically as the demands for dental implant therapy from patients grow rapidly in China. The treatment and prevention of postoperative infection has drawn more and more attention from clinicians. But there is still a lack of consensus on the management of the complications. Therefore, the Chinese Society of Oral Implantology has organized the conference to discuss and draft the expert consensus, which aims to provide clinicians with guidelines for preventing, diagnosing and treating the complications of sinus infection and sinus graft infection.

Some comments on the "fitting"

Wang yong

2022, 27(2): 75-75. DOI: 10.12337/zgkqzzxzz.2022.04.003

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Re-discuss the "fitting"

Chen Jiang

2022, 27(2): 76-79. DOI: 10.12337/zgkqzzxzz.2022.04.004

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The word "fitting" cannot be discarded

Liu Zhonghao

2022, 27(2): 80-81. DOI: 10.12337/zgkqzzxzz.2022.04.005

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Surface characteristics and mechanical properties of titanium implant modified by selective laser melting technology

Wang Xuan, Duan Yansheng, Song Shuang, Wang Shuyan, Zhao Guoqiang, Zhao Wenshuang, Yang Rui, Tian Huan, Liu Xiangdong, Chen Xutao, Ding Feng, Song Yingliang, Zhang Sijia

2022, 27(2): 82-86. DOI: 10.12337/zgkqzzxzz.2022.03.006

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Objective To establish the surface of titanium implants treated by SLM, and explore the relevant mechanisms that may improve the osseointegration level of implants through in vitro experiments. Methods Implant and titanium sheet samples were prepared and divided into SLM group, sand blasting and acid etching (SLA) group and control group. Surface microtopography was observed, roughness was measured, and mechanical properties were evaluated. HGF-C339 cells was used to observe the morphology, growth and proliferation of surface cells. Results The surface of SLM group was honeycomb, with irregular pores, rich layers and peak-valley shape. roughness of SLM surface was the highest, the mean Ra value was（0.908±0.015）μm, the mean Rz value was（1.589±0.160.3）μm. SLM surface had suitable mechanical strength, the mean yield strengths were（110±2.5）MPa. SLM surface biosafety was well evaluated, and the adhesion growth of HGF-C339 cells was normal. Conclusion The surface of titanium implants treated with SLM has good bio-safety, high surface roughness, and suitable mechanical strength. The surface of titanium implants treated with SLM could be a new approach for surface treatment.

Correlation between periodontitis and peri-implant mucositis under different conditions of peri-implant plaque control

Li Yuanyuan, Cui Xiaoyi, He Baojie

2022, 27(2): 87-92. DOI: 10.12337/zgkqzzxzz.2022.04.007

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Objective To investigate the correlation between periodontitis and peri-implant mucositis (PM) under different conditions of plaque control, and to evaluate related risk factors of peri-implant mucositis. Methods Patients who underwent implant surgery at SATH Hospital of stomatology, Henan University from January 2010 to January 2020 and met the the inclusion criteria were randomly recalled. Oral clinical examination and radiographic examination were carried out. The stage and grade of periodontitis, implant plaque index, peri-implant mucositis and so on were recorded. Chi-square test was used to analyze the correlation between periodontitis and PM under different conditions of plaque control, and Logistic regression was used to analyze the indipendent risk factors of PM. Results A total of 182 patients with 427 implants were included in the study. 76（41.8%） patients and 152（35.6%）implants had PM. Regression analysis showed that patients with severe periodontitis（periodontitis ≥ Stage III）（P=0.049,OR=2.108,95%CI: 1.003~4.429）and plaque index (PLI）≥2（P=0.001,OR=3.126,95%CI: 1.566~6.238）had a higher risk of PM. When PLI<2, there was no significant relationship between PM and severe periodontitis（P=0.645）; When PLI≥2, PM was significantly correlated with severe periodontitis（P=0.001）. Conclusion When peri-implant plaque was well controlled, the relationship between periodontitis and PM was not significant. Severe periodontitis was significantly associated with PM when peri-implant plaque control was poor, Therefore, mastering plaque control methods and maintaining periodontal health are of great significance in the prevention of PM.

New clinical operation of comprehensive sequential treatment for immediate implant placement in the posterior mandibular region

Zhou Qin, Zhao Zhengyi, Zou Duohong, Yang Chi, Zhang Zhiyuan

2022, 27(2): 93-98. DOI: 10.12337/zgkqzzxzz.2022.04.008

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Objective Immediate implant placement has been widely employed in the anterior teeth area. Unlike the immediate implantation in the anterior zone which serve the patients' aesthetic needs, treatment in the posterior region pays more attention to the recovery of masticatory function. However, most of the mandibular posterior teeth consist of two roots, implants that are placed immediately after extraction of posterior teeth are prone to mesial-distal deviation when drilling in the interradicular septa, which will ultimately affect the axial direction of the implants. This article introduces an exploration and practice of new treatment for immediate implantation in the posterior mandibular area, which can effectively solve the above problems. Methods Our team summed up a new method of “a comprehensive sequential treatment plan for immediate implantation of posterior mandibular teeth”, minimally invasive extraction of unreserved mandibular posterior teeth, and the maximum possible preservation of the volume of interradicular bone and the bone wall of the alveolar socket, accurate placement of implants in the alveolar socket interval. To this end, we have developed a special series of surgical instruments for immediate implantation in the posterior teeth area, applied for 18 patents, and completed the achievements of transformation and the production and clinical application of medical products. Results Clinical application confirmed that this method increased the initial stability and precision of implants of mandibular posterior teeth. Conclusion This scheme is conducive to the ideal position of implant placement effectively improving the success rate of immediate implantation of mandibular posterior teeth and is worthy of clinical promotion.

A case of implant periapical lesion and literature review

Yang Jingjing, Yu Zhengrong, Gong Jinmei, Hu Changqi, Huang Jiangqin, Wei Hongwu, Guo Shuigen

2022, 27(2): 99-104. DOI: 10.12337/zgkqzzxzz.2022.04.009

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Dental implants are the best way to repair dentition defects and restore the patient's aesthetics and function. With the widespread use of dental implants, the complications after implant restoration should also be paid attention to by clinicians. This article reports a case of implant periapical diseases, and describes the etiology, diagnosis, prevention and treatment methods of implant apical lesions in combination with relevant literature.

Implant therapy for adult unilateral posterior scissors-bite

Yu Weijun, Hu Shucheng, Jiang Bin, Cao Yifeng, Lu Eryi

2022, 27(2): 105-111. DOI: 10.12337/zgkqzzxzz.2022.04.010

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Scissors-bite will reduce chewing efficiency and affect appearance. Scissors-bite accompanied with periodontitis and alveolar bone loss is a clinical challenge. To investigate implant restoration of complex adult unilateral posterior scissors-bite, interdisciplinary approaches, including periodontal initial therapy and alveolar ridge preservation, were conducted before implant-supported fixed restoration. Peri-implantitis was treated with implantoplasty, GBR and keratinized gingival augmentation. The result was stable at 6 months follow-up, and occlusion was ideal in T-scan analysis. Fixed implant restoration for the adult unilateral posterior scissors-bite patient after hard and soft tissue augmentation and sufficient maintenance care was effective.

A systematic review comparing the exposure of customized titanium mesh and conventional titanium mesh after guided bone regeneration

Zhou Libo, Su Yucheng, Li Xinru, Zhang Liqiang, Chen Deping

2022, 27(2): 112-118. DOI: 10.12337/zgkqzzxzz.2022.04.011

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Objective To explore the exposure rate of customized titanium mesh and traditional titanium mesh after guided bone regeneration(GBR) and the time point of soft tissue dehiscence, and to provide clinical reference for GBR. Methods Databases, including PubMed, EMbase, Web of Science and Cochrane Central Register Controlled Trials, were searched by two independent researchers, for published articles on titanium mesh exposure after GBR. This study selected English articles published from January 1st, 2011 to December 31th, 2021. Stata 16.0 software was used to systematically analyze the research data that finally met the inclusion criteria. Results A total of 962 articles were found, and 9 of which were quantitatively analysed. The combined value of the total exposure rate of titanium mesh was 0.37（95%CI=0.31~0.42）. The result of subgroup analysis showed that the combined value of the customized titanium mesh exposure rate was 0.20（95%CI=0.13~0.27） and the combined value of the traditional titanium mesh exposure rate was 0.60（95%CI=0.52~0.68）. Conclusion The exposure rate of customized titanium mesh is lower than that of traditional titanium mesh, which is of great significance to provide sufficient grafting space for accurate bone reconstruction in GBR.

Research progress of intraoperative complications during lateral window technique for sinus floor elevation

Luo Shaokang, Li Shuchun

2022, 27(2): 119-123. DOI: 10.12337/zgkqzzxzz.2022.04.012

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Lateral window technique for sinus floor elevation is an effective surgical method to solve the lack of bone mass in the posterior maxilla after tooth loss. The technical sensitivity is high. The most common intraoperative complications include bleeding and maxillary sinus membrane perforation. If the surgical risk is not fully evaluated or the intraoperative complications are not properly handled, it may lead to surgical failure and compromised long-term effects of implantation. In this article a literature review will be conducted on the influencing factors, prevention and management of intraoperative complications related to lateral fenestration of lateral window technique for sinus floor elevation procedure.

Effects of selective serotonin reuptake inhibitor on skeletal system and osseointegration of oral implants

Li Shunshun, Wang Feng

2022, 27(2): 124-129. DOI: 10.12337/zgkqzzxzz.2022.04.013

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Selective serotonin reuptake inhibitor (SSRI) is the most widely used antidepressant. Existing studies have shown that SSRI impairs osteogenic function, reduces bone mineral density, inhibits bone healing, and may inhibit osseointegration of implants. This article introduces the pharmacological action of SSRI, its effect on skeletal system and its mechanism, and discusses the research status of oral implant failure related to SSRI use.

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