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Clinical application of CBCT and digital guide technology in the treatment of impacted teeth Lu Ruizhi, Lu Xingwei, Xiao Wenlei, Huang Xingtai, Zhai Qianglan, Liu Chao China Journal of Oral and Maxillofacial Surgery    2025, 23 (6): 635-640.   DOI: 10.19438/j.cjoms.2025.06.015 Abstract （145）      PDF （813KB）（327）       Knowledge map    Cone beam CT (CBCT) and digital guide technology have been extensively used in impacted molar treatment, and the application has always a significant meaning for ensuring the surgical accuracy and safety. CBCT has high image resolution and 3D images and can make accurate measurement and evaluation of the tooth root, nerve, blood vessel and bone tissue structures, which is helpful to preoperative design. Digital guiding technology integrates CBCT image with intra-oral scan data to plan personalized guiding instruments for accurate guiding on the path of surgical procedure and minimizing surgical complications. In this article, we reviewed the principle and progress of CBCT and digital guiding technology and their clinical application. It covered the advantages and shortcomings of these technologies and focuses ahead on the future, such as dynamic navigation, AI-assisted treatment, and toward domestic equipment. Reference | Related Articles | Metrics

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Application progress of artificial intelligence in diagnosis and treatment of oral genetic diseases Gu Anqi, Zhang Chen, Tao Baoxin, Wu Yiqun, Zhou Wenjie China Journal of Oral and Maxillofacial Surgery    2025, 23 (4): 406-415.   DOI: 10.19438/j.cjoms.2025.04.015 Abstract （310）      PDF （1365KB）（1182）       Knowledge map    Rare condition, scattered cases, complex etiology and clinical features, inadequate diagnostic criteria and methods and other reasons lead to the serious lack of accessibility for early diagnosis and treatment of oral genetic diseases. Artificial intelligence(AI) is expected to make breakthroughs in the prevention, diagnosis, treatment and basic research of oral genetic diseases due to its unique advantages in feature extraction, variant recognition, classification, typing and outcome prediction of large and complex data sets. Many studies have identified and processed patients' medical records, photos, radiographic images, key genes or transcriptome, biomarkers and other data through AI models or software to assist the diagnosis, treatment and research of various oral genetic diseases. Based on the literature evidence, this article reviewed and summarized the application of AI in teeth, periodontal tissues, oral mucosa, orofacial clefts related genetic diseases and other oral genetic diseases that cause craniofacial malformations. The future development of this field was also prospected. Reference | Related Articles | Metrics

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Newly revised ISSVA classification for vascular anomalies(2025 version) and interpretation Du Zhong, Zheng Jiawei, Wang Yan'an China Journal of Oral and Maxillofacial Surgery    2025, 23 (4): 313-317.   DOI: 10.19438/j.cjoms.2025.04.001 Abstract （523）      PDF （1054KB）（886）       Knowledge map    Vascular anomalies can be primarily categorized into two major groups: vascular tumors and vascular malformations. In 1982, Mulliken and Glowacki proposed a revolutionary biological classification. Specifically, based on the proliferation characteristics of endothelial cells, these anomalies were differentiated into "hemangiomas" and "vascular malformations". In 1996, this classification system was adopted by the International Society for the Study of Vascular Anomalies (ISSVA) as the standard classification, and has been undergoing continuous refinement up to the present. In May 2025, the latest ISSVA World Congress was convened in Paris. The 2018 classification system, which is currently in wide use, was further optimized. A substantial number of structural and detailed adjustments were made, rendering the new classification system more streamlined. Consequently, its usability has been remarkably enhanced. This evolution of the ISSVA classification mirrors the deepening of the understanding from the morphological level to the molecular mechanism level. Every update holds milestone significance for the standardization of the diagnosis and treatment of vascular diseases globally. This paper aimed to introduce and interpret the newly revised ISSVA classification (2025 version), providing a reference for clinical practice, scientific research, and academic exchanges. Reference | Related Articles | Metrics

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Expert consensus on diagnosis and clinical management of medication-related osteonecrosis of the jaw HE Yue, CHEN Heng, AN Jin-gang, GUO Yu-xing, PAN Jian, TIAN Lei, LIU Bing, HOU Jin-song, LI Jin-song, JIANG Can-hua, LI Meng-yu, TIAN Zhen, XU Jie, ZHU Ling, SUN Chang-fu, ZHI Ke-qian, QU Qing, ZONG Chun-lin, SUN Jing-jing, ZHANG Zhi-yuan China Journal of Oral and Maxillofacial Surgery    2023, 21 (4): 313-325.   DOI: 10.19438/j.cjoms.2023.04.001 Abstract （2886）      PDF （2051KB）（2682）       Knowledge map    Medication-related osteonecrosis of the jaw(MRONJ) is a complication caused by the application of anti-resorptive medications, angiogenesis inhibitors, hormones and other medications for the treatment of some systemic diseases. The clinical symptoms include swelling, pain, masticatory disorders, persistent fistula, bone exposure and even pathological fracture, which seriously affect the patients' quality of life. Domestically, there is a lack of consensus or guidelines on classification, staging and treatment of MRONJ, and different institutions make diagnosis and treatment plans empirically. In order to unify and standardize the diagnosis and treatment of MRONJ and improve the prognosis, an expert panel of MRONJ research from 12 famous domestic medical colleges and affiliated hospitals convened a meeting to discuss the diagnosis and treatment opinions of MRONJ. Meanwhile, consensus recommendations were also revised with a comprehensive literature review of the previous treatment experiences and research findings. Finally, this expert consensus was finished for clinical references. Reference | Related Articles | Metrics

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Research and treatment of cleft lip and palate in China: review of 30 years SHI Bing, LI Cheng-hao, LI Jing-tao, YANG Chao, YI Heng, JIA Zhong-lin, LI Yang, HA Pin China Journal of Oral and Maxillofacial Surgery    2016, 14 (5): 385-397.   Abstract （1079）   HTML （17）    PDF （1597KB）（1767）       Knowledge map    Team approach for cleft treatment began in China since first introduced in 1990s. Multidisciplinary teams were established in several cleft centers. Based on the experience from developed countries, the Chinese teams are focusing on the development of indigenized and individualized intervention protocol for Chinese cleft patients; meanwhile, genetic and molecular mechanisms involved in normal and abnormal cleft lip/palate development were intensively investigated. Boosted by modern biological technology and evidence-based medicine, Chinese teams are making progressive exploration on innovative treatment technique. After generations of endeavor, we are able to offer world-class care to cleft patients.This review highlighted current team approach and treatment methods involved in clefts with special respect to recent advances derived from 1990s in China. Reference | Related Articles | Metrics

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Advances in the application of lightweight deep learning models in diagnosis and treatment of dental diseases Gao Anqi, Huang Xinrui, Zhang Xiaofan, Zhang Shaoting, Hong Yi, Chen Lei, Wang Xudong China Journal of Oral and Maxillofacial Surgery    2025, 23 (5): 517-522.   DOI: 10.19438/j.cjoms.2025.05.014 Abstract （318）      PDF （718KB）（218）       Knowledge map    The lightweighting of medical deep learning models through adaptive compression techniques significantly reduces computational complexity while maintaining diagnostic accuracy, enabling deployment on edge devices and promoting the implementation of AI in clinical scenarios such as emergency care, surgical guidance, and portable monitoring. In the field of dental care, research on lightweight models has employed architectures such as MobileNet and YOLO, along with techniques like convolutional optimization and knowledge distillation, to accomplish imaging-based segmentation of anatomical structures such as teeth and jaws, and the diagnosis of diseases including caries and oral cancer. Some of these models have been integrated into edge devices such as smart toothbrushes and mobile applications. This paper reviewed the application progress of lightweight models in diagnosis and treatment of dental disease, aiming to provide references for further development and clinical transformation of related technologies. Reference | Related Articles | Metrics

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China Journal of Oral and Maxillofacial Surgery    2011, 9 (5): 420-429.   Abstract （400）      PDF （1422KB）（1348）       Knowledge map    Related Articles | Metrics

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The accuracy of robot-assisted dental implant surgery and factors affecting precision MIREALIMU·Miadili, LI Xiao-man, GAO Yi-ming China Journal of Oral and Maxillofacial Surgery    2024, 22 (6): 611-614.   DOI: 10.19438/j.cjoms.2024.06.015 Abstract （363）      PDF （519KB）（611）       Knowledge map    With the evolution of the fourth industrial revolution, the development of more complex intelligent systems has greatly improved the availability and reliability of digital technology. Digital technology has blurred the boundaries between the physical world and the virtual reality through the means of virtual reality and augmented reality. The field of oral implantation has benefited from technological advancements, gradually evolving from digital static guide technology to the use of new dynamic navigation equipment and real-time tracking technology with novel autonomous robots. This article reviewed the principles of various dental robotics and common surgical deviations, aiming to provide relevant references for oral clinical practice and basic research. Reference | Related Articles | Metrics

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Clinical investigation on tilted implant placement in the maxilla using dynamic navigation Zheng Yue, Zhang Senlin China Journal of Oral and Maxillofacial Surgery    2025, 23 (6): 600-607.   DOI: 10.19438/j.cjoms.2025.06.010 Abstract （89）      PDF （2304KB）（91）       Knowledge map    PURPOSE: To evaluate the accuracy and clinical outcomes of dynamic navigation for the placement of intentionally tilted implants in the posterior maxilla. METHODS: Twenty-eight patients with maxillary edentulism or continuous multiple posterior maxillary tooth loss who were treated in Affiliated Jiangning Hospital of Nanjing Medical University from February 2023 to June 2024 were selected. All patients were treated with axial and tilted implants under dynamic navigation guidance. Implant three-dimensional deviation was calculated after surgery, and survival rate of axial and tilted implants was compared. Follow up visits were performed every 3 months after rehabilitation with definitive prosthesis, and any complication was noted and the stability of the implants and prosthesis as well as proper occlusion were checked. RESULTS: A total of 97 implants were implanted, including 42 tilted implants and 55 axial implants. The accuracy measurement showed that the neck deviations of the inclined implant and the axial implant were (1.03±0.39) and (1.12±0.25) mm, respectively, the tip deviations were (1.21±0.23) and (1.29±0.32) mm, respectively, and the depth deviations were (0.63±0.20) and (0.54±0.34) mm, respectively, the angular deviations were 2.46°±0.68° and 2.22°±0.57°, respectively. There was no significant difference in the various indicators of implant accuracy between the two groups(P>0.05). No complications such as maxillary sinus injury occurred during operation. One tilted implant and one axial implant failed to fall off before restoration. The implant failure rates were 2.38% and 1.82%, respectively, and the difference was not significant(P=0.885). The patients were followed up for 3 to 12 months. The stability of the implants and restorations was good, the masticatory function recovered well, and no maxillary sinusitis occurred. CONCLUSIONS: Tilted implantation in the maxillary posterior region under the guidance of dynamic navigation has the advantages of high accuracy, good safety, minimal trauma and short treatment cycle. It is an effective method for the treatment of alveolar bone atrophy in the maxillary posterior region. Reference | Related Articles | Metrics

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The impact of enhanced recovery after surgery measures on postoperative recovery quality in patients after orthognathic surgery Liu Tiantian, Wu Yufei, Wang Xiaoxia, Zhang Ruibin, Xun Zemin, Zhang Hui China Journal of Oral and Maxillofacial Surgery    2025, 23 (6): 578-585.   DOI: 10.19438/j.cjoms.2025.06.007 Abstract （129）      PDF （1086KB）（106）       Knowledge map    PURPOSE: To compare the impact of different compliance rates of enhanced recovery after surgery (ERAS) measures on the postoperative recovery quality of patients undergoing orthognathic surgery. METHODS: A retrospective cohort study was conducted to collect the information of patients who underwent elective orthognathic surgery at the Third Affiliated Hospital of Air Force Military Medical University from September 2020 to February 2023. According to the compliance rate of ERAS measures, the patients were divided into two groups: the low compliance group (compliance rate <80%) and the high compliance group (compliance rate≥80%). Propensity score matching was used to match the two groups of patients, with 127 cases in each group after matching. The primary outcome was the 40-item recovery quality score scale (Quality of Recovery-40, QoR40) on the first postoperative day. Secondary outcomes included QoR40 scores on postoperative days 3, 5, 7, and 14, the pain scores one day after surgery, and the correlation between ERAS measures and the QoR40 score on the first postoperative day. RESULTS: The QoR40 scores on the first postoperative day in the high compliance group were significantly higher than those in the low compliance group (P<0.05). The comfort score in the five dimensions of the QoR40 score was higher and the pain scores was lower in the former group (P<0.05). There were no significant difference in QoR40 scores on postoperative days 3, 5, 7, and 14 between the two groups(P>0.05). The application of antibiotics during operation, maintenance of intravenous anesthesia, body temperature management, airway management, prevention and treatment of postoperative nausea and vomiting, no agitation during the recovery period, and early postoperative ambulation were positively correlated with the QoR40 score of patients one day after operation (P<0.05). CONCLUSIONS: With the compliance of ERAS measures higher than 80%, the quality of recovery and the comfort on the first postoperative day in patients undergoing orthognathic surgery is significantly enhanced. Reference | Related Articles | Metrics

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China Journal of Oral and Maxillofacial Surgery    2010, 8 (5): 386-390.   Abstract （832）      PDF （767KB）（1757）       Knowledge map    Related Articles | Metrics

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Survival analysis of 336 patients with HPV-mediated and non-mediated oropharyngeal squamous cell carcinoma LI Heng-yong, YANG Song, ZHOU Kai, KONG Yu, LI Jie-ying, LI Gui-zhong, GE Sheng-you, YANG Xiao-chen, FENG Yuan-yong, SONG Kai, SHANG Wei China Journal of Oral and Maxillofacial Surgery    2022, 20 (4): 378-383.   DOI: 10.19438/j.cjoms.2022.04.011 Abstract （514）      PDF （1414KB）（693）       Knowledge map    PURPOSE: To analyze and compare the difference in survival and prognosis of patients with HPV-mediated and non-mediated oropharyngeal squamous cell carcinoma(OPSCC) in different stages of new and old TNM, so as to provide clinical basis for the treatment strategy and prognosis evaluation of OPSCC. METHODS: Clinical data of primary OPSCC patients treated at Affiliated Hospital of Qingdao University between January 2010 and December 2016 were collected. Immunohistochemical staining of the pathological specimens was used to detect p16 expression level. Patients' survival information was evaluated using version 7, 8 edition of TNM staging system for tumor staging. The effects of different stages of HPV-mediated and non-mediated OPSCC on survival and prognosis were analyzed and compared. SPSS 25.0 software package was used for data analysis. RESULTS: Among 336 OPSCC patients, one hundred and one patients (30.1%) were HPV-mediated OPSCC. The 5-year survival rate of HPV-mediated OPSCC patients was 47.5% (48/101), and the median survival time was 58 months. The 5-year survival rate of patients with non-mediated OPSCC was 34.0% (80/235), with a median survival time of 37 months. In HPV-mediated OPSCC patients with version 8 TNM stage and version 7 TNM stage, the overall rate of degradation was 77.2% (78/101), 100% (69/69) in patients with advanced stage, and 69.6%(48/69) in patients with advanced stage degraded to early stage. CONCLUSIONS: The survival rate and median survival time of HPV-mediated OPSCC patients are significantly better than those of non-mediated OPSCC patients. The OPSCC stage in the 8th edition of TNM staging manual is more consistent with clinical reality than that in the 7th edition, and the prognosis stratification is more clear, which can better guide clinical decision-making. Reference | Related Articles | Metrics

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Progress in anatomy and clinical applications of buccal fat pad Niu Lingxiao, Dang Qingqing, Han Bing China Journal of Oral and Maxillofacial Surgery    2025, 23 (3): 302-306.   DOI: 10.19438/j.cjoms.2025.03.015 Abstract （364）      PDF （765KB）（828）       Knowledge map    Buccal fat padBFP) is an irregular mass of adipose tissue located within the deep facial recesses, with rich blood supply and encapsulated structure, which can isolate mesenchymal stem cells with multidirectional differentiation ability. The pedicled buccal fat pad flap is easy to prepare and has a high survival rate, and has been widely used in the repair of soft and hard tissue defects in the oral and maxillofacial region. The osteogenic ability of buccal fat pad derived mesenchymal stem cells has been demonstrated in vitro and has been used in clinical trials to repair jaw defects in recent years. In plastic surgery, the potential of both pedicled and free buccal fat pad flaps for improving facial contours continues to be explored. However, research on the long-term benefits for patients and the differences between these flaps and other pedicled skin flaps is limited. This review summarized the current advancements in the anatomy and some clinical applications of the buccal fat pad. Reference | Related Articles | Metrics

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Visual analysis of clinical research literatures on temporomandibular joint disorders at both home and abroad from 2013 to 2023 LIU Xing-yu, JIANG Nan China Journal of Oral and Maxillofacial Surgery    2025, 23 (2): 185-195.   DOI: 10.19438/j.cjoms.2025.02.014 Abstract （849）      PDF （2071KB）（859）       Knowledge map    PURPOSE: To analyze the evolution of domestic and international clinical researches on temporomandibular joint disorders(TMD) from 2013 to 2023,to understand the development trends and research hotspots, and to explore future research directions. METHODS: Clinical research literatures on TMD published between 2013 and 2023 were collected through PubMed, China National Knowledge Infrastructure(CNKI), Wanfang Data, and VIP databases. CiteSpace 6.1.R6 software was utilized for visual analysis. Methods included keyword frequency statistics, co-occurrence analysis, clustering analysis, and timeline analysis to construct knowledge maps and identify research hotspots. RESULTS: Domestic research hotspots were primarily focused on pain management, acupuncture therapy, and tissue repair. In contrast, international researches heavily emphasized quality of life and non-invasive treatment approaches. Both domestic and international studies underscored the importance of interdisciplinary integration and the application of new technologies. Keywords such as "acupuncture treatment" have appeared relatively late in domestic researches but showed a clear trend, indicating an interest in the application of traditional medicine and emerging technologies. International researches had earlier focused on psychological factors and quality of life, and leaded in the application of new materials and technologies. CONCLUSIONS: Although there are differences in methods and focal points between domestic and international researches, there is a consistent focus on core issues such as pain management and the application of imaging technologies. Future researches should enhance attention to psychological factors and comprehensive health management, draw on international experience, explore the application of new materials and new technologies, and promote interdisciplinary collaboration to improve the diagnosis and treatment of temporomandibular joint disorders and the quality of life of patients. Reference | Related Articles | Metrics

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Evidence-based evaluation of the efficacy of tranexamic acid in reducing perioperative blood loss in orthognathic surgery patients Liu Yang, Li Chenxi, Gong Zhongcheng, Ding Mingchao, Sun Jialin China Journal of Oral and Maxillofacial Surgery    2025, 23 (5): 508-516.   DOI: 10.19438/j.cjoms.2025.05.013 Abstract （139）      PDF （1794KB）（98）       Knowledge map    PURPOSE: Based on meta-regression and trial sequential analysis, this study aimed to comprehensively evaluate the clinical efficacy with respect to tranexamic acid(TXA) for blood loss control in perioperative patients underwent orthognathic surgery. METHODS: Embase, PubMed, WanFang Data, VIP, China National Knowledge Infrastructure(CNKI), Chinese Clinical Trial Registry(ChiCTR) and Cochrane Central Register of Controlled Trials (CENTRAL) were electronically retrieved to collect clinical studies related to appraise the effectiveness in perioperative orthognathic surgery patients intravenously used TXA from inception to August, 2024. Quality assessment of the risk of bias for randomized controlled trials (RCTs) was performed using Cochrane Collaboration's Risk of Bias Tool (2.0), whereas the Newcastle-Ottawa Scale was used for assessment of the prospective cohort studies. Based on the results of methodological heterogeneity, corresponding meta-analyses were carried out with a random-effects or fixed-effects model applying R programming software. A trial sequential analysis of outcomes was carried out to investigate the reliability and conclusiveness of findings. RESULTS: The paired meta-analysis random-effects model (I2=81%) showed that compared with the control group, the use of TXA significantly reduced the amount of bleeding in perioperative patients [standardized mean difference(SMD) = -1.26; 95%CI (-1.81, -0.71), P<0.01]. Subgroup analysis revealed that TXA had a significant effect on reducing intraoperative bleeding in patients with different surgeries, with monomaxillary orthognathic surgery ranking as the most effective [SMD = -1.58; 95%CI (-2.41, -0.76), P<0.01], followed by bimaxillary orthognathic surgery [SMD = -0.97; 95%CI(-1.69, -0.25), P<0.01]. The result of meta regression showed there was no significant difference in the hemostatic effect of TXA on patients with increasing doses(5, 10, 15, 20 mg/kg) (P>0.05). Sensitivity analysis verified that the pooled values were stable and reliable. Egger's test indicated a certain degree of publication bias(Z=-3.10, P= 0.002). Low risk-of-bias trials showed benefit of tranexamic acid use with a sufficiently powered sample, through trial sequential analysis. CONCLUSIONS: Taken as a whole, existing evidence suggests that TXA can effectively reduce perioperative bleeding in patients undergoing orthognathic surgery, regardless of its dosage administered. However, further clinical researches are still needed to provide more baseline data, transfusion-related indicators, and information on adverse events such as vascular embolism, in order to comprehensively evaluate and analyze the efficacy and safety of a single dose of intravenous TXA for perioperative blood loss control in patients treated with orthognathic surgery. Reference | Related Articles | Metrics

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The application of artificial intelligence-assisted tracing method in orthognathic cephalometric measurement teaching XU Xin-xin, LI Xiao China Journal of Oral and Maxillofacial Surgery    2025, 23 (1): 72-76.   DOI: 10.19438/j.cjoms.2025.01.013 Abstract （327）      PDF （1023KB）（493）       Knowledge map    PURPOSE: To evaluate the application effect of artificial intelligence-assisted scanning method in orthognathic cephalometry teaching. METHODS: From June 2023 to June 2024, a total of 24 fourth-year undergraduate students who practiced in the Second Dental Center, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine were selected as the study objects, and randomly divided into the experimental group and control group, with 12 students in each group. Based on the contents of the chapter "malocclusion", the experimental group used artificial intelligence to measure the cephalic image of X-ray films, while the control group used traditional method to measure the cephalic image of X-ray films. The results of the two teaching methods were evaluated by means of questionnaire survey, theoretical test and cephalometric operation test. SPSS 27.0 software package was used for data analysis. RESULTS: The students of experimental group were better than those of the control group in their understanding of theoretical knowledge, results of case analysis, and the differences were statistically significant(P<0.05). The accuracy of cephalometric measurement in the experimental group was higher than that in the control group, and the cephalometric measurement time in the experimental group was less than that in the control group, and the difference was statistically significant(P<0.05). CONCLUSIONS: Artificial intelligence-assisted cephalometric measurement can significantly improve the accuracy and speed of projection measurement, help students understand the theoretical learning such as landmarks, enhance the teaching effect, and students have a high degree of recognition. Reference | Related Articles | Metrics

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Clinical evaluation of partial odontectomy for the removal of impacted third molar invading the inferior alveolar nerve canal Yan Weifeng, Chen Zhifang, Lu Luyun China Journal of Oral and Maxillofacial Surgery    2025, 23 (4): 355-360.   DOI: 10.19438/j.cjoms.2025.04.007 Abstract （253）      PDF （1182KB）（283）       Knowledge map    PURPOSE: To explore the clinical efficacy of performing a second surgical extraction of impacted third molars with roots invading the inferior alveolar nerve canal after partial crown resection. METHODS: A total of 64 cases of mesially or horizontally impacted third molars with roots invading the inferior alveolar nerve canal, which were diagnosed by CBCT and treated in the Department of Oral Surgery at Hefei Stomatological Hospital West Branch from January 2023 to December 2024 were selected. The patients were randomly divided into two groups, with 32 cases in each group. The experimental group underwent partial crown resection first, and then complete tooth extraction was performed 3 or 6 months later. The control group underwent routine one-time tooth extraction. The adverse reactions of the experimental group were observed during the follow-up interval after partial crown resection, and the incidence of lower alveolar nerve injury, infection and dry socket after complete tooth extraction, pain and swelling at 1, 3 and 7 days after surgery were compared between the two groups. RESULTS: After partial crown resection, only 2 patients in the experimental group experienced mild pain, 1 patient had slight swelling, and one impacted tooth developed pericoronitis after eruption. There were no pulp symptoms, and no other abnormalities were observed. After the complete extraction of tooth in both groups, the incidence of inferior alveolar nerve injury in the experimental group was significantly lower than that in the control group(P<0.05), and the degree of postoperative pain and swelling was also significantly milder than that in the control group(P<0.05). CONCLUSIONS: Partial odontectomy can significantly reduce the risk of inferior alveolar nerve injury, minimize surgical trauma, and result in milder postoperative reactions. It is a safer and more effective method for impacted tooth extraction. Reference | Related Articles | Metrics

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China Journal of Oral and Maxillofacial Surgery    2017, 15 (2): 180-184.   DOI: 10.19438/j.cjoms.2017.02.017 Abstract （525）      PDF （2772KB）（1284）       Knowledge map    Related Articles | Metrics

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Natural course following extraction of impacted mandibular third molars and their effect on mandibular second molars YANG Qing-ran, XU Guang-zhou China Journal of Oral and Maxillofacial Surgery    2024, 22 (4): 365-372.   DOI: 10.19438/j.cjoms.2024.04.008 Abstract （459）      PDF （833KB）（517）       Knowledge map    PURPOSE: To observe the natural course after extraction of impacted mandibular third molars(IM3Ms) and their influence on adjacent mandibular second molars (M2Ms). METHODS: Thirty-four patients (51 IM3Ms) with bone impaction of mandibular third molars were selected. The affected teeth were extracted by piezosurgery and pneumatic turbine handpiece. The postoperative reaction and distal bone defect of M2Ms were observed before operation, 1 week and 6 months after operation. The depth of distal bone defect at M2Ms before and after operation was compared, and the influencing factors were analyzed. SPSS 29.0 software package was used for data analysis. RESULTS: Before surgery, no apparent bone defects were observed in the distal mesial bone of M2Ms, but bone defects occurred during IM3Ms extraction due to bone removal and tooth extraction procedures. After 6 months, although some recovery in bone height was observed and the rate of bone defects decreased, it did not reach the preoperative level. The depth of IM3Ms impaction was the main influencing factor for the recovery rate. Probing depth significantly increased compared to preoperative levels. Patients experienced more pain within 24 hours postoperatively, which eased after 1 week, although mild limitation of mouth opening and facial swelling persisted. The extraction of IM3Ms had minimal impact on patients' daily life, emotions, work, and sleep. CONCLUSIONS: After the mandibular third molar extraction, the distal bone height adjacent to the second molar will partially recover, but it doesn't reach the preoperative level. In order to reduce the impact on adjacent teeth and bone tissue, surgeons need to adopt more refined surgical techniques during tooth extraction. At the same time, analgesic drugs should be given after removal of IM3Ms, and health education should be strengthened to improve the comfort of patients. Reference | Related Articles | Metrics

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Influencing factors of postoperative nausea and vomiting in orthognathic surgery patients: a meta-analysis Jiang Meiping, Wang Zengxiang, Wu Ying, Li Ting, Huang Qian China Journal of Oral and Maxillofacial Surgery    2025, 23 (4): 401-405.   DOI: 10.19438/j.cjoms.2025.04.014 Abstract （208）      PDF （892KB）（111）       Knowledge map    PURPOSE: To explore the influencing factors of postoperative nausea and vomiting(PONV) in orthognathic patients. METHODS: CNKI, Wanfang Database, Weipu.com, China Biomedical Database, PubMed, Web of Science, Cochrane Library, Embase and SpringerLink databases were searched to find relevant studies on the analysis of PONV influencing factors in orthognathus patients. The data were analyzed by RevMan5.3 software, the results of heterogeneity test were analyzed by fixed effects model or random effects model, and sensitivity analysis and publication bias evaluation were also conducted. RESULTS: A total of 7 literatures were included, with a total of 2280 subjects. The combined OR values of four factors were significant. The results showed gender [OR=1.62, 95%CI(1.12,2.33)], type of surgery [OR=1.77, 95%CI(1.41,2.22)], postoperative opioid use [OR=1.99, 95%CI(1.19,3.33)], PONV history [OR=2.98, 95%CI(1.66,5.35)] was the influencing factor of PONV in orthognathic patients. CONCLUSIONS: Female, bimaxillary orthognathic surgery, postoperative opioid use, and history of PONV were risk factors for orthognathic patients. Reference | Related Articles | Metrics