Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology最新文献

{"title":"Morinda officinalis polysaccharides inhibit the expression and activity of NOD-like receptor thermal protein domain associated protein 3 in inflammatory periodontal ligament cells by upregulating silent information regulator sirtuin 1.","authors":"Hongxuan Cai, Zheng'an Wang, Zan Zhang, Jingyi Dai, Weixing Si, Qiya Fu, Jingwen Yang, Yaguang Tian","doi":"10.7518/hxkq.2023.2023114","DOIUrl":"https://doi.org/10.7518/hxkq.2023.2023114","url":null,"abstract":"<p><strong>Objectives: </strong>This study aims to investigate the effect of morinda officinalis polysaccharides (MOP) in inflammatory microenvironment on the expression of silent information regulator sirtuin 1 (SIRT1) and NOD-like receptor thermal protein domain associated protein 3 (NLRP3) in periodontal ligament cells.</p><p><strong>Methods: </strong>Thirty rats were randomly divided into control group (<i>n</i>=6) and model group (<i>n</i>=24). The model group used orthodontic wire ligation to establish periodontitis, and six rats from each group were killed after 3 weeks. The successful modeling was confirmed by Micro-CT. The remaining rats in the model group were randomly divided into natural recovery group, normal saline (NS) group, and MOP group. In the MOP group, MOP [200 mg/(kg·3d), 50 µL for 4 weeks] was injected into the palatal side of the left maxillary first molar of the rats, while the NS group was injected with equal volume of NS. The natural recovery group did not undergo any treatment. The left maxilla tissues of the rats were collected, and pathological changes in perio-dontal ligament cells were observed by hematoxylin-eosin (HE) staining. The expression of SIRT1 and NLRP3 was detected by immunohistochemistry. Cultivate periodontal ligament fibroblasts <i>in vitro</i> and detect the effect of MOP on cell activity using CCK-8. The 4th generation cells were divided into control group, inflammation group (10 µg/mL lipopolysaccharide), and experimental group (5 µmol/L MOP, 5 µmol/L MOP+10 µg/mL lipopolysaccharide). The expression of SIRT1 and NLRP3 was detected by quantitative realtime polymerase chain reaction (qRT-PCR) and Western blot analyses. The acetylation of NLRP3 and the contents of interleukin (IL)-1β and IL-18 were detected by immunoprecipitation and enzyme-linked immunosorbent assay, respectively. Statistical analysis of data was conducted using Prism 9.0 software.</p><p><strong>Results: </strong>In the <i>vivo</i> experiments, the expression of NLRP3 and SIRT1 in the MOP group decreased significantly compared with that in the natural recovery group and NS group, while the expression of SIRT1 increased (<i>P</i><0.05) and inflammatory cell infiltration decreased. In the <i>in vitro</i> experiments, the expression of NLRP3 mRNA and protein in the inflammation group increased (<i>P</i><0.05), while the expression of SIRT1 significantly decreased (<i>P</i><0.01); MOP upregulated the expression of SIRT1 in inflammatory cells (<i>P</i><0.05), reduced the expression of NLRP3 and its acetylation level significantly (<i>P</i><0.05), suppressed the content of IL-1β and IL-18 in the supernatant (<i>P</i><0.01).</p><p><strong>Conclusions: </strong>The SIRT1 expression decreased, and that of NLRP3 expression increased in inflammatory periodontal ligament cells. MOP intervention promoted SIRT1 expression, resulting in the inhibition of NLRP3. Meanwhile, the acetylation level of NLRP3 reduced through deacetylation, leading to the ","PeriodicalId":94028,"journal":{"name":"Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10722461/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140875111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Imaging analysis of 1 138 supernumerary teeth by using cone-beam computed tomography.","authors":"Xiaolin Liu, Qun Ren, Jiuping Bai, Pei Kang, Guiyun Ren, Xiangjun Li, Xiaowei Feng","doi":"10.7518/hxkq.2023.2023110","DOIUrl":"https://doi.org/10.7518/hxkq.2023.2023110","url":null,"abstract":"<p><strong>Objectives: </strong>This study aims to analyze and summarize the characteristics of supernumerary teeth by using cone-beam computed tomography (CBCT).</p><p><strong>Methods: </strong>A total of 718 patients with 1 138 supernumerary teeth were retrospectively collected. Age, gender, number, location, morphology, eruption status, and accompanying symptoms of the supernumerary teeth were statistically analyzed. The relationship relative to jaws, gender, and eruption status were analyzed and discussed.</p><p><strong>Results: </strong>The average age of the patients was 9.54±5.32 years, and the male to female ratio was 2.88∶1. About 77.02% of the patients sought medical advice during the mixed dentition period, and 50.70% had one supernumerary tooth. These supernumeraries were most commonly conical in shape, and 85.76% of them were in the incisor region, 92.09% in the upper jaw, 46.75% in inverted position, and 86.20% unerupted. Overall, 65.29% of them had fully developed roots, and 60.63% had an impact on adjacent structures. Significant differences were found in eruption status, morphology, zoning, direction, root development, and impact on adjacent structures between the supernumerary teeth located in the upper and lower jaws (<i>P</i><0.05). Significant differences were also detected in gender, morphology, zoning, orientation, root development, and impact on adjacent structures between erupted and unerupted teeth (<i>P</i><0.05). The incidence of supernumerary teeth in the incisor region was higher in males than that in females. Moreover, the root of supernumeraries was more completely developed in males than in females (<i>P</i><0.05).</p><p><strong>Conclusions: </strong>For supernumerary teeth, CBCT images can provide accurate three-dimensional radiographic data and are valuable for clinical diagnosis and treatment planning.</p>","PeriodicalId":94028,"journal":{"name":"Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10722453/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140868828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prediction model of dental caries in 12-year-old children in Sichuan Province based on machine learning.","authors":"Xinmiao Yan, Taolan Sun, Yuhang Lu, Xin Tan, Zhuo Wang, Miaojing Li","doi":"10.7518/hxkq.2023.2023124","DOIUrl":"https://doi.org/10.7518/hxkq.2023.2023124","url":null,"abstract":"<p><strong>Objectives: </strong>The machine learning algorithm was used to construct a prediction model of children's dental caries to determine the risk factors of dental caries in children and put forward targeted measures and policy suggestions to improve children's oral health.</p><p><strong>Methods: </strong>Stratified cluster random sampling was adopted in this study. In accordance with different policies and measures in Sichuan Province, 12-year-old students from 3-4 middle schools in eight cities of Sichuan Province were randomly selected for questionnaire survey, oral examination, and physical examination. Multivariate logistic regression analysis of risk factors for dental caries in 12-year-old children was conducted. The dataset was randomly divided into training set and validation set at a ratio of 7∶3. Four machine learning algorithms, including random forest, decision tree, extreme gradient boosting (XGBoost), and Logistic regression, were constructed using R version 4.1.1, and the prediction effects of the four prediction models were evaluated using the area under receiver operating characteristic curve (AUC).</p><p><strong>Results: </strong>A total of 4 439 children aged 12 years were included in this study. The incidence of permanent teeth caries was 50.93%. The results of multivariate logistic regression analysis showed that body mass index, highest educational background of the father, highest educational background of the mother, whether to brush teeth, how many times a day, use of toothpaste when brushing teeth, duration of brushing teeth, mouthwash after meals, eating before going to bed after brushing teeth, sweet drinks, snacks, going to dental clinic to examine teeth, and age of brushing teeth were the factors influencing children's dental caries (<i>P</i><0.05). The AUC values predicted by random forest, decision tree, Logistic regression, and XGBoost were 0.840, 0.755, 0.799, and 0.794, respectively. In the random forest model, the variable with the highest contribution was eating before bed after brushing.</p><p><strong>Conclusions: </strong>A prediction model of dental caries in children was established on the basis of random forest, showing good prediction effect. Taking preventive measures for the main factors affecting the occurrence of dental caries in children is beneficial.</p>","PeriodicalId":94028,"journal":{"name":"Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10722460/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140872815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Personal understanding of the extraction or rescue on severe periodontitis teeth.","authors":"Qintao Wang, Zhiwei Ma, Jinjin Wang","doi":"10.7518/hxkq.2023.2023274","DOIUrl":"https://doi.org/10.7518/hxkq.2023.2023274","url":null,"abstract":"<p><p>To keep or extract severe periodontitis damaged teeth is one of the controversial topics in the dentistry from ancient times to present. From different perspectives, professions, technologies, time, and economics, there may be different choices with unidentified consensus. Based on the author's own understanding, experience, literature review, and other aspects, this article proposes some exchange views on influencing factors, abandoning consideration, preserving possibility, and how to detect and prevent the development of lesions. The aim is to stimulate more thinking and accumulate clinical evidence-based data among peers, in order to facilitate cooperation and promote oral health.</p>","PeriodicalId":94028,"journal":{"name":"Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10722459/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140873961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Association between serum Galectin-3 and periodontitis in patients with type 2 diabetes mellitus.","authors":"Yanbiao Zhang, Meirong Wei, Tianyong Xia, Wenting Yin, Shumei Mao","doi":"10.7518/hxkq.2023.2023192","DOIUrl":"https://doi.org/10.7518/hxkq.2023.2023192","url":null,"abstract":"<p><strong>Objectives: </strong>This study aims to investigate the correlation between serum Galectin-3 levels and the risk of periodontitis in patients with type 2 diabetes mellitus (T2DM).</p><p><strong>Methods: </strong>A total of 140 patients with T2DM admitted to the endocrinology department of Weifang People's Hospital, Affiliated to Weifang Medical College from July 2021 to November 2022 were selected and divided into T2DM without periodontitis group (T2DM group, <i>n</i>=67) and T2DM with periodontitis group (T2DMP group, <i>n</i>=73) according to whether they were combined with periodontitis. In the same period, 65 non-periodontitis volunteers with normal blood glucose were selected as healthy control group (NC group). Blood samples of all subjects were collected, and serum Galectin-3 levels and related laboratory indices were detected and compared among the three groups.</p><p><strong>Results: </strong>Serum Galectin-3 levels in the NC, T2DM, and T2DMP groups were 3.81 (3.49, 4.15), 4.82 (4.25, 5.26), and 6.83 (5.19, 7.28) ng/mL, respectively. After adjusting for the influence of baseline data by multiple linear regression, serum Galectin-3 levels in the T2DMP and T2DM groups were significantly higher than those in the NC group (all <i>P</i><0.05). Multiple linear regression analysis showed that serum Galectin-3 levels were positively correlated with homeostatic model of the insulin resistance index (<i>β</i>=0.254, 95%CI:0.089-0.419, <i>P</i>=0.003), glycosylated hemoglobin A1c (<i>β</i>=0.397, 95%CI: 0.049-0.745, <i>P</i>=0.026), and clinical attachment loss (<i>β</i>=0.298, 95%CI: 0.024-0.572, <i>P</i>=0.033). After adjusting for the effects of covariates, binary logistic regression showed that serum Galectin-3 levels were significantly associated with the risk of periodontitis in patients with T2DM (OR=2.146, 95%CI: 1.260-3.655, <i>P</i>=0.005). Trend test showed that the risk of periodontitis in patients with T2DM increased with increasing serum Galectin-3 levels (<i>P</i>_trend=0.011). Receiver operating characteristic (ROC) curve analysis showed that the area under the curve (AUC) of serum Galectin-3 in predicting T2DM periodontitis was 0.861 (95%CI: 0.801-0.920, <i>Z</i>=11.806, <i>P</i><0.001).</p><p><strong>Conclusions: </strong>Serum Galectin-3 levels were elevated in patients with T2DM and pe-riodontitis and associated with the risk of periodontitis.</p>","PeriodicalId":94028,"journal":{"name":"Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10722456/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140870574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Facial nerve function training in patients with peripheral facial paralysis: an expert consensus.","authors":"Yunmei Chen, Yan Liu, Qiuyu Huang, Jiang Luo, Hongmei Wu, Yehua Wang, Ling Wu, Xiu'e Li, Xiaoqin Bi","doi":"10.7518/hxkq.2023.2023200","DOIUrl":"https://doi.org/10.7518/hxkq.2023.2023200","url":null,"abstract":"<p><p>Facial nerve training can prevent facial expression muscle atrophy and promote the recovery of facial para-lysis in patients with peripheral facial paralysis. However, there is still a lack of specific and unified technical standards for facial nerve training, which results in a variety of clinical training methods and uneven levels. In order to standardize the application of facial nerve function training technology for nursing staff, the study convened relevant domestic experts, based on evidence-based combination with the disease characteristics of peripheral facial paralysis and expert clinical experience, conducted in-depth interviews with experts, expert correspondence and expert meetings, and finally formulated the expert consensus on facial nerve function training in patients with peripheral facial paralysis. Overall, suggestions for standardizing the timing, training methods, evaluation methods, health education and other aspects were provided for clinical reference.</p>","PeriodicalId":94028,"journal":{"name":"Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10722454/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140862135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of drug factors in 5-aminolevulinic acid photodynamic therapy for oral potentially malignant disorder.","authors":"Dandan Li, Zhujun Yu, Cheng Nie, Jianli Wang","doi":"10.7518/hxkq.2023.2023210","DOIUrl":"https://doi.org/10.7518/hxkq.2023.2023210","url":null,"abstract":"<p><strong>Objectives: </strong>This study aimed to analyze the influence of drug factors on the efficacy of 5-aminolevulinic acid (ALA) photodynamic therapy for oral potentially malignant disorder to improve clinical efficacy and promote clinical rational drug use.</p><p><strong>Methods: </strong>Literature on the treatment of oral potentially malignant disorder by using ALA photodynamic therapy was collected and analyzed from PubMed, ISI Web of Knowledge database, CNKI, VIP, and Wanfang database.</p><p><strong>Results: </strong>A total of 690 cases were collected, with an average complete response rate of 65.94%. The groups treated with 16.8% methyl aminolevulinate cream, local topical, once a week, and pre-activation time of 2-4 hours were better than the other subgroups, with average complete response rates of 100%, 66.91%, 78.28%, and 77.54%, respectively.</p><p><strong>Conclusions: </strong>Drug factors have direct influence on the curative effect. The development of novel oral ALA formulations from the perspective of drug improvement is an important strategy to improve efficacy.</p>","PeriodicalId":94028,"journal":{"name":"Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10722451/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140861460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correlation between differences in intraoperative jumping gaps and soft tissue changes around immediate implant placement and provisionalization in the maxillary anterior region.","authors":"Sui Zhang, Yi Sun, Changbo Huang, Dongning He","doi":"10.7518/hxkq.2023.2023153","DOIUrl":"https://doi.org/10.7518/hxkq.2023.2023153","url":null,"abstract":"<p><strong>Objectives: </strong>This study aims to evaluate the correlation between differences in intraoperative jumping gaps and soft tissue changes around immediate implant placement and provisionalization (IIPP) in the maxillary anterior region. Results will provide a basis for clinical evaluation of the change trend and long-term stability of the labial soft tissue contours of patients with different jumping gaps.</p><p><strong>Methods: </strong>Thirty-two patients with single tooth loss in the maxillary aesthetic area were enrolled, and they all received immediate implant placement and restoration. All patients were divided into three groups: A, B, and C according to the size of the jumping gap, group A: horizontal defect dimension (HDD) ≤2 mm; group B: 2 mm<HDD≤3 mm; group C: HDD>3 mm. Geomagic studio 2013 was used to quantitatively analyze the contour volume of the soft tissue around the implant and the level of the labial gingival margin. The pink esthetic score (PSE) was used for the final aesthetic evaluation.</p><p><strong>Results: </strong>All implants had osseointegration within 6 months after the surgery. The average thickness of soft tissue contour volume changed by 0.62 mm±0.15 mm, and the average PES was 11.09±0.99. The changes in the gingival mucosa levels in the three groups at 6 months after operation were 0.45 mm±0.11 mm, 0.40 mm±0.12 mm, and 0.35 mm± 0.11 mm, respectively. The changes in the average thickness of the soft tissue contour volume in the three groups at 6 months after the operation were 0.77 mm±0.16 mm, 0.63 mm±0.17 mm, and 0.54 mm±0.11 mm. A moderate negative correlation was found between the jumping gap size and the gingival mucosa level, and the average thickness changed. No significant correlation was found between size of jumping gap and PES.</p><p><strong>Conclusions: </strong>Although the contour volume of the labial soft tissue continuously decreased within 6 months after IIPP in the maxillary anterior region, the surgical procedure can achieve a satisfactory aesthetic effect, and the level of soft tissue around the implant can be well maintained.</p>","PeriodicalId":94028,"journal":{"name":"Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10722462/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140873960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Vital pulp therapy of permanent teeth with irreversible pulpitis.","authors":"Jun Wang","doi":"10.7518/hxkq.2023.2023193","DOIUrl":"https://doi.org/10.7518/hxkq.2023.2023193","url":null,"abstract":"<p><p>Traditionally, vital pulp therapy (VPT) is mainly indicated for young permanent teeth. However, in recent years, VPT has been increasingly applied to mature permanent teeth. VPT was previously thought to be effective only for teeth with normal pulp or reversible pulpitis. However, an increasing body of evidence has demonstrated that VPT can successfully manage permanent teeth with irreversible pulpitis or apical periodontitis. This work discusses which teeth with irreversible pulpitis or apical periodontitis are suitable for VPT, the recommended method to evaluate and select this kind of case, and the clinical procedure involved to operate such a case.</p>","PeriodicalId":94028,"journal":{"name":"Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10722450/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140869152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clinical solutions for natural abutments with preexisting defected crown margin in the aesthetic area.","authors":"Feng Liu, Yalin Zhan, Xinran Liu","doi":"10.7518/hxkq.2023.2023281","DOIUrl":"https://doi.org/10.7518/hxkq.2023.2023281","url":null,"abstract":"<p><p>Crown replacement has remained one of the difficult methods for installing fixed prosthesis but is often performed because of aesthetic factors and invasion of biological width. This article focuses on the clinical scenario in which preexisting crown margin has defects. Given that clinical decisions regarding restoration management and perio-dontal tissues have to be made with caution, a decision tree of the decision making process for natural abutments in aesthetic area with preexisting defected crown margin is presented. The re-establishment of a new crown margin is the key to the success of a new restoration, and the new margin should be located at the proper esthetic position and right biological position. It should have fine, smooth, and continuous morphology.</p>","PeriodicalId":94028,"journal":{"name":"Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10722455/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140874340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}