28 February 2026, Volume 36 Issue 1
    

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    Critical Review
  • ZHANG Xueming, KANG Feiwu
    《Journal of Oral and Maxillofacial Surgery》. 2026, 36(1): 1-10. https://doi.org/10.12439/kqhm.1005-4979.2026.01.001
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    This article focuses on the clinical prevention and management of medication-related osteonecrosis of the jaw (MRONJ) in patients treated with bone-modifying agents (BMAs) [bisphosphonates (BPs) and denosumab]. Integrating domestic and international consensus guidelines with clinical practice, it proposes a comprehensive, risk-stratified prevention and management strategy. The article systematically analyzes the three major high-risk factors for MRONJ (medication-related, systemic, and local oral factors), emphasizing the difference in MRONJ risk associated with different drug regimens (low-dose vs. high-dose), and constructs a four-tier (R0–R3) risk stratification system accordingly. For each risk level, the paper elaborates on corresponding key focuses for oral screening, preventive interventions, indications for invasive procedures (such as tooth extraction), and perioperative management protocols. Specific guidance is provided for high-risk (R3) patients regarding drug holidays, radiographic evaluation, minimally invasive surgery, and wound management strategies. The aim of this article is to promote a shift in the clinical approach to MRONJ from a reactive treatment model to a proactive prevention model, providing systematic reference for dentists to effectively reduce the incidence of MRONJ while ensuring the treatment of patients' underlying systemic diseases.

  • Basic Scientific Study
  • ZHANG Hao, WANG Zuolin
    《Journal of Oral and Maxillofacial Surgery》. 2026, 36(1): 11-18. https://doi.org/10.12439/kqhm.1005-4979.2026.01.002
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    Objective: To investigate the role of Yap/Taz in alveolar bone remodeling after unloading of occlusal force. Methods: The unloading model of the left mandibular alveolar bone was established in 8-week-old male C57BL/6J mice by extracting the left maxillary first molar, and the contralateral alveolar bone was used as control. The mandibles were collected 1, 2 and 4 weeks after unloading, respectively. Micro-CT scanning and three-dimensional reconstruction were employed to quantitatively analyze changes in bone mineral density (BMD), bone volume/total volume (BV/TV), trabecular thickness (Tb.Th) and trabecular number (Tb.N). The quantitative change of CD105+mesenchymal stem cells (MSCs) in alveolar bone was observed by immunofluorescence staining. The gene expression levels of Yap/Taz in alveolar bone were detected by real-time quantitative polymerase chain reaction (RT-qPCR). Mouse alveolar bone derived MSCs were isolated and cultured in vitro. Small interfering RNA (siRNA) was used to transfect MSCs, and the subsequent effect of Yap/Taz knockdown on MSCs osteogenic differentiation was assessed by alkaline phosphatase (ALP) staining for ALP-positive areas and by RT-qPCR for the expression of Runx2, Sp7, Col1a1 and Bglap. Results: After 4 weeks of unloading, the alveolar bone exhibited a significant decrease in BMD and BV/TV (P<0.05), a marked reduction in the number of MSCs and a significant downregulation of Yap/Taz (P<0.05) compared with the control group. In vitro, Yap/Taz knockdown resulted in decreased ALP-positive areas and significantly downregulated expression of Runx2, Sp7, Col1a1, and Bglap in MSCs compared with the control group (P<0.05). Conclusion: Unloading of occlusal force led to alveolar bone loss, a reduction in MSCs, and downregulation of Yap/Taz, while knockdown of Yap/Taz inhibited the osteogenic differentiation of MSCs.

  • LAN Lingli, GU Wei, WANG Xuefeng, HAN Shangzhi, CHEN Xibo
    《Journal of Oral and Maxillofacial Surgery》. 2026, 36(1): 19-26. https://doi.org/10.12439/kqhm.1005-4979.2026.01.003
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    Objective:To investigate the therapeutic effect of bone marrow mesenchymal stem cells (BMSCs) combined with platelet-rich fibrin (PRF) on temporomandibular joint osteoarthritis (TMJOA) in mice.
    Methods:BMSCs isolated from C57BL/6J mice were evaluated for stem cell surface markers CD29, CD44, CD90, CD105, CD166 by flow cytometry. Osteogenic, adipogenic, and chondrogenic differentiation assays were performed to confirm the multilineage differentiation potential. A total of 120 8-week-old C57BL/6J mice were used to establish TMJOA models by bilateral disc removal. Approximately 0.1 mL of orbital blood was collected from each mouse to prepare PRF. Based on different treatments, joints were assigned to four groups: The control group (injection of 20 μL complete medium after disc removal), the BMSCs+PRF group (implantation of PRF combined with injection of 20 μL BMSCs suspension), the BMSCs group (injection of 20 μL BMSCs suspension only), and the PRF group (PRF implantation only). Mice were sacrificed in batches at 1, 2, 4 and 8 weeks postoperatively. The severity of the condylar cartilage degeneration was evaluated according to the modified Mankin scoring system after hematoxylin-eosin (HE) and Safranin O staining. Real-time quantitative polymerase chain reaction (RT-qPCR) was performed at 8 weeks postoperatively to assess the relative mRNA expression of Aggrecan, Sox9, Col1a1, Col2a1.
    Results:Flow cytometric analysis and trilineage differentiation assays confirmed that the isolated cells exhibited typical characteristics of BMSCs. Histological assessment revealed the modified Mankin scores were significantly reduced in the BMSCs+PRF group compared with the control group, suggesting alleviated cartilage degeneration. Consistently, RT-qPCR analysis demonstrated a statistically significant increase in the mRNA levels of Aggrecan, Sox9, Col1a1, Col2a1 in the BMSCs+PRF group .
    Conclusion:Combined application of BMSCs and PRF intra-articularly effectively alleviates TMJOA progression and promotes cartilage repair in mice.
  • Clinical Study
  • SIQIN Gaowa, LI Chenxi, HUANG Dishu, WANG Yue, GONG Zhongcheng
    《Journal of Oral and Maxillofacial Surgery》. 2026, 36(1): 27-33. https://doi.org/10.12439/kqhm.1005-4979.2026.01.004
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    Objective:To evaluate the clinical factors affecting the recovery of patients with Bell's palsy.Methods:Clinical data from 94 patients who were admitted to two hospitals in Xinjiang Uygur Autonomous Region between January 2010 and January 2024 due to Bell's palsy were retrospectively analyzed.Patient demographic characteristics were evaluated using descriptive statistical methods, comparisons between groups were performed using the Chi-square test, the independent risk factors affecting patient prognosis were identified using a multivariate logistic regression model. The effectiveness of the model was assessed by analyzing the receiver operating characteristic (ROC) curve and calculating the area under the curve (AUC).Results:The age of the enrolled patients ranged from 28 to 77 years, with a mean age of(49.30±6.96)years. Among them, 51.1% were female. Univariate analysis showed that smoking (P=0.016), hypertension (P=0.007), diabetes mellitus (P=0.005) and higher House-Brackmann (H-B) grade were associated with incomplete recovery in patients (P<0.001). Multivariate logistic regression analysis showed that smoking (OR=8.295, P=0.010), hypertension (OR=9.667,P=0.008) and higher H-B grade (OR=9.094,P=0.032) were independent predictors for incomplete recovery in patients with Bell's palsy. These three factors demonstrated some predictive value for the prognosis of facial paralysis recovery, with AUCs of 0.67, 0.68 and 0.68 for smoking, hypertension, and higher H-B grade, respectively. Neither physical therapy nor different pharmacological interventions showed a statistically significant association with recovery in patients with Bell's palsy (P>0.05).Conclusion:Smoking, hypertension, and higher H-B grade are independent risk factors affecting recovery prognosis in patients with Bell's palsy. The predictive model based on these factors demonstrated certain discriminative ability and can serve as a reference for optimizing clinical management.
  • CHEN Yuanyuan, YANG Xu, MENG Du, YANG Yichen, LIU Hualian
    《Journal of Oral and Maxillofacial Surgery》. 2026, 36(1): 34-40. https://doi.org/10.12439/kqhm.1005-4979.2026.01.005
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    Objective:To investigate the expression, clinical significance, and prognostic relevance of B7 homolog 3 (B7‑H3) in oral tongue squamous cell carcinoma (OTSCC).Methods:The Cancer Genome Atlas (TCGA) database was used to compare B7‑H3 expression between OTSCC tissues and adjacent tissues, and to analyze its association with patient overall survival rate. Gene ontology (GO) functional enrichment analysis was performed on genes co‑expressed with B7‑H3. Immunohistochemistry was employed to detect B7‑H3 expression in tissue microarrays containing 53 OTSCC samples and 9 adjacent normal samples collected at our institution from January 2010 to December 2018. The Wilcoxon rank‑sum test was used to compare expression levels between groups; theχ 2 test was applied to analyze the relationship between B7‑H3 expression and clinicopathological characteristics; Kaplan‑Meier survival analysis was conducted to assess the association between B7‑H3 expression and overall survival rate in OTSCC patients; and the Cox proportional hazards model was used to evaluate the impact of various factors on prognosis.Results:Analysis based on TCGA data showed that B7‑H3 expression was significantly higher in OTSCC tissues than that in adjacent tissues (P<0.001). Kaplan‑Meier survival analysis indicated that patients with high B7‑H3 expression had a lower overall survival rate than those with low expression, although the difference was not statistically significant (P=0.246). GO functional enrichment analysis revealed that B7‑H3‑related genes were mainly involved in biological processes such as cell‑cell adhesion and glycoprotein metabolism. Tissue microarray analysis showed that B7‑H3 expression was significantly elevated in OTSCC tissues compared with adjacent tissues (P<0.001), and its expression level was not significantly correlated with clinicopathological features. Kaplan-Meier survival analysis demonstrated that patients with high B7‑H3 expression had significantly lower overall survival rate than those with low expression (P<0.05). Cox proportional hazards model analysis demonstrated that age and pathological differentiation grade were identified as independent prognostic factors, while B7-H3 showed an association with prognosis in univariate analysis but was not an independent predictor in the multivariate analysis.Conclusion:B7‑H3 is highly expressed in OTSCC and is associated with poor prognosis.
  • Oral Implants
  • LI Sainan, YOU Lang, LEI Jingshi, DAI Jiaxiu, FAN Zhen
    《Journal of Oral and Maxillofacial Surgery》. 2026, 36(1): 41-48. https://doi.org/10.12439/kqhm.1005-4979.2026.01.006
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    Objective:To explore the clinical efficacy of lateral approach maxillary sinus floor elevation with simultaneous implantation in treatment of severe bone deficiency in the maxillary posterior region.Methods:Between January 2023 and March 2024, patients who underwent lateral approach maxillary sinus floor elevation with simultaneous implant placement and had a residual bone height (RBH)≤3 mm were enrolled. Osseointegration and bone augmentation effects were assessed by cone beam CT (CBCT) at 6 months postoperatively. Restoration was completed at 7-8 months postoperatively. The follow-up lasted for 12 months postoperatively, that is, 4 months after restoration. The incidence of complications, implant stability quotient (ISQ), implant survival rate, and patient satisfaction were recorded.Results:The mean bone height gain in the edentulous area was (7.60±2.04) mm at 6 months postoperatively. The ISQ value has significantly increased compared with the initial measurement and a total of 38 implants achieved osseointegration. Sinus membrane perforation occurred in 3 sites (7.89%) during surgery, and 1 site (2.63%) of cover screw detachment was observed during the postoperative follow-up period. At 12 months postoperatively, in patients with a 100% implant survival rate, the visual analogue scale (VAS) scores for masticatory function and aesthetic effect were (8.37±1.20) and (8.45±1.18) points, respectively.Conclusion:When the RBH in the maxillary posterior region is less than or equal to 3 mm, the lateral approach maxillary sinus floor elevation with simultaneous implantation can achieve bone augmentation and osseointegration at the same time. Within the 12-month follow-up period, the survival rate of the implants was relatively high.
  • Clinical Report
  • TANG Zhaolong, CHEN Hui, ZHANG Tiecheng, LIU Guicai
    《Journal of Oral and Maxillofacial Surgery》. 2026, 36(1): 49-53. https://doi.org/10.12439/kqhm.1005-4979.2026.01.007
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    Objective:To investigate the clinical efficacy of minimally invasive ultrasonic bone surgery for extracting maxillary anterior supernumerary teeth in children.Methods:A total of 128 children with maxillary anterior supernumerary teeth treated in our hospital between July 2021 and July 2023 were included. Based on the surgical methods, the patients were divided into 2 groups: The conventional group (n=64) underwent the conventional extraction, and the ultrasonic bone surgery group (n=64) underwent the minimally invasive ultrasonic bone surgery. Perioperative parameters were compared, including success rate (χ 2 test), operation time (independent-samplet-test), postoperative pain (Mann‑WhitneyUtest), and changes in gingival crevicular fluid levels of inflammatory mediators [myeloperoxidase (MPO), prostaglandin E2 (PGE2), pentraxin‑3 (PTX3)] and stress mediators [peroxisome proliferator‑activated receptor γ (PPARγ), glutathione peroxidase (GPX)] (independent-samplet-test).Results:The success rate did not differ significantly between the two groups (P>0.05). However, the ultrasonic bone surgery group had a significantly shorter operation time than the conventional group (P<0.001). Postoperative pain scores were significantly lower in the ultrasonic bone surgery group on day 1 and day 3 than in the conventional group (P<0.05). On postoperative day 3, levels of MPO, PGE2, PTX3, and PPARγ increased in both groups compared with preoperative levels, but were significantly lower in the ultrasonic bone surgery group than in the conventional group. GPX levels decreased in both groups, but were significantly higher in the ultrasonic bone surgery group than in the conventional group (allP<0.01).Conclusion:Minimally invasive ultrasonic bone surgery for extraction of maxillary anterior supernumerary teeth in children demonstrated favorable outcomes, significantly shortening operation time, reducing surgical trauma, alleviating postoperative pain, and effectively mitigating local inflammation and stress responses.
  • XUE Chao, WANG Shimei, ZHANG Jinjin, TAO Qian, CAI Weixin
    《Journal of Oral and Maxillofacial Surgery》. 2026, 36(1): 54-58. https://doi.org/10.12439/kqhm.1005-4979.2026.01.008
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    Objective:To analyze the clinicopathological data of 25 cases of facial basal cell carcinoma (BCC) in Fengqing County of Lincang City, Yunnan Province.Methods:A total of 25 patients diagnosed with cutaneous BCC at The People's Hospital of Fengqing Lincang City, Yunnan Province, from 2019 to 2023 were enrolled. The epidemiological characteristics and clinical data were retrospectively analyzed, including age, sex, occupation, disease duration, whether the lesion was single or multiple, lesion location, size, and pathological features. Pathological classification was performed according to the McKee criteria.Results:This study included 7 male and 18 female patients with BCC. The mean age was (63.20±12.27) years. All 25 patients presented with single lesions, with disease duration ranging from 1 month to 10 years. The most commonly affected site was the nasal ala (9 cases), followed by the lower eyelid (7 cases), nasal tip (2 cases), nasal dorsum (1 case), lateral canthus (1 case), medial canthus (1 case), cheek (1 case), earlobe (1 case), preauricular region (1 case), and postauricular region (1 case). Lesion sizes varied, with the smallest being 0.2 cm × 0.2 cm and the largest being 2.0 cm × 1.5 cm. Most patients were asymptomatic. The most common histopathological subtype was nodular (9 cases), followed by pigmented (6 cases), micronodular (5 cases), basosquamous (1 case), infiltrative (1 case), ulcerative (1 case), fibroepithelial (1 case), and adenoid (1 case).Conclusion:Facial BCC primarily affects middle-aged and elderly individuals. Early-stage BCC usually presents without symptoms, and the histopathological subtypes are diverse.
  • Review
  • MAO Jiayi, WANG Zuolin
    《Journal of Oral and Maxillofacial Surgery》. 2026, 36(1): 59-61. https://doi.org/10.12439/kqhm.1005-4979.2026.01.009
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    Periodontitis is a chronic inflammatory disease affecting periodontal supporting tissues, which is closely associated with various systemic diseases. In recent years, a number of epidemiological investigations have revealed the possible independent association between periodontitis and myocardial infarction to some extent, and certain research results suggest that periodontal pathogens may be one of the important factors mediating this association. Based on the current research data, the link between the two diseases has yet to be established. This article reviews the research progress on the association between periodontitis and myocardial infarction, with the aim of evaluating the existing epidemiological evidence, elucidating potential pathological mechanisms, and providing a theoretical basis for interdisciplinary prevention and treatment strategies.

  • WANG Xin, SU Jiansheng
    《Journal of Oral and Maxillofacial Surgery》. 2026, 36(1): 62-65. https://doi.org/10.12439/kqhm.1005-4979.2026.01.010
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    Mammalian lipid droplets (LDs), a class of cellular organelles associated with cellular metabolism, are composed of a neutral lipid core encapsulated by a monolayer phospholipid polar membrane. Initially regarded as static energy reservoirs with relatively simple functions, LDs have been the subject of recent advancements that have significantly expanded our understanding of their biogenesis mechanisms and functions. Beyond serving as central hubs for intracellular lipid metabolism, LDs actively participate in the pathogenesis and progression of inflammatory and infectious diseases, while playing critical regulatory roles in host immune responses. This paper provides a review of research in these fields.

  • Case Report
  • ZHANG Zheng, ZHANG Zuxun
    《Journal of Oral and Maxillofacial Surgery》. 2026, 36(1): 66-69. https://doi.org/10.12439/kqhm.1005-4979.2026.01.011
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    Langerhans cell histiocytosis (LCH) is a rare inflammatory myeloid neoplasm that uncommonly occurs in the jawbones. This article presents a case of LCH in the mandible in an adult, and through a review of the relevant literature, aims to discuss its clinical features, differential diagnosis, and treatment options, to enhance clinicians' understanding of this disease.

  • WU Pingfan, CHEN Linlin
    《Journal of Oral and Maxillofacial Surgery》. 2026, 36(1): 70-73. https://doi.org/10.12439/kqhm.1005-4979.2026.01.012
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    Stafne bone cavity (SBC), also known as static bone cavity, is a rare bony defect on the lingual side of the mandible. SBC is usually seen in the mandibular angle region and is rarely located in the anterior mandible. This paper reports a case of SBC located in the premolar region of the mandible. By reviewing relevant literature, we aim to strengthen dentists' understanding of SBC in atypical locations and avoid misdiagnosis.

  • ZHU Ning, ZHAO Guile, BAO Mingzhe, ZHANG Gaowei, LI Chunjie, GAO Ning
    《Journal of Oral and Maxillofacial Surgery》. 2026, 36(1): 74-78. https://doi.org/10.12439/kqhm.1005-4979.2026.01.013
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    Mucoepidermoid carcinoma (MEC) typically originates from major salivary glands but may also arise primarily from minor salivary glands in the palate. It can show diverse clinical symptoms, such as masses, pain, or ulcers. However, cases presenting primarily with mucosal erythema are relatively rare. This article reports a case of palatal MEC that presented erythema as the main clinical feature, and discusses its clinical characteristics, diagnosis, and treatment.