Journal of Periodontics and Implant Dentistry最新文献

{"title":"Evaluation of Peri-implant Bone Change and its Risk Factors in Patients Presenting to a Medical Center: A 7-year Cross-sectional Study","authors":"Min-Hsuan Lin Min-Hsuan Lin, 馮已榕 Min-Hsuan Lin, 陳俊榮 I-Jung Feng, 毛念平 Chun-Jung Chen","doi":"10.53106/261634032022090502001","DOIUrl":"https://doi.org/10.53106/261634032022090502001","url":null,"abstract":"\u0000 Abstract: Objective: To evaluate the amount of peri-implant bone loss detected on digital panoramic radiographs in patient presenting to Chi-Mei medical center and to determine the factors associated with peri-implant bone loss. Materials and Methods: The panoramic radiographs of patient who presenting to Chi-Mei medical center (CMH) form year of 2008 to 2014 were screened. Those with at least one dental implant were selected and further evaluated. Submerged implants, implants with healing cap, failure implants, and implants with blurred vision were excluded. For patient level, sex, age and number of implants were recorded. For each implant obscured on the radiographs, location, type of implant-abutment connection, type of prosthesis, implant placed at CMH or non-CMH were recorded. The amount of peri-implant bone loss (PIBL) was assessed at the mesial and distal aspect using magnifying option. Clinical features of patients and implants were separately presented by descriptive statistics. Two multiple logistic regression models were also performed. Results: A total of 34.83% (650/1866) implants with detectable bone loss were identified. According to the result of chi-square test, age, implant-abutment connections and type of prosthesis were separately shown a significant influence on PIBL. Patients older than 25 years old have greater than 2.5 times risk of developing bone loss than younger patients. Comparing to the bone level with butt-joint connections, tissue level and bone level with platform switch connection separately significantly decrease 93.5% and 59.2% risk of bone loss. For the type of prosthesis evaluation, fix partial denture, overdenture and full mouth fix complete denture increased 1.97, 2.39 and 1.53 times risk of bone loss. Conclusion: Among these patients presenting to CMH with implants, the prevalence rate of peri-implant bone loss was 34.83% in implant level. Age, different implant-abutment connection designs and type of prosthesis could play a major role in peri-implant bone loss.\u0000 \u0000","PeriodicalId":150986,"journal":{"name":"Journal of Periodontics and Implant Dentistry","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126636029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clinical Outcome of Treating Peri-Mucositis and Peri-implantitis with Adjunctive Enamel Matrix Derivative Application: A Systematic Review","authors":"Yu-Hsuan Chen Yu-Hsuan Chen, Wen-Yi Wei Yu-Hsuan Chen, Chia-Dan Cheng Wen-Yi Wei, Yi-Wen Cathy Tsai Chia-Dan Cheng, Cheng-Yang Chiang Yi-Wen Cathy Tsai, Chia-Wei Lu Cheng-Yang Chiang, Wan-Chien Cheng Chia-Wei Lu","doi":"10.53106/261634032022040501007","DOIUrl":"https://doi.org/10.53106/261634032022040501007","url":null,"abstract":"\u0000 Purpose: Enamel matrix derivative (EMD), the active component of Emdogain®, has been demonstrated to affect cytokines related to fibroplasia, angiogenesis, inflammation, and chemotaxis both in vitro and in vivo. However, whether the adjunctive application of EMD has clinical benefits on treating peri-mucositis and peri-implantitis has not been investigated thoroughly. The aim of this systematic review is to investigate the clinical outcomes of treating peri-implant diseases with adjunctive EMD application. Materials and Methods: A systematic search of multiple electronic databases including PubMed, Cochrane library, Cumulative Index to Nursing and Allied Health Literature (CINAHL), Embase, and Scopus was carried out based on the PICOs structure for articles published up to September 2020. The primary outcomes were bleeding on probing (BoP), probing depth (PD), and radiographic bone level (RBL). Data and risk of bias were explored qualitatively. Results: The search identified 942 studies with 7 studies included for qualitative analysis. These studies reported 200 participants with 270 implants diagnosed with peri-mucositis (n=41) and peri-implantitis (n=229). For implants with peri-mucositis, BoP reduced significantly (83 to 25%) at the 3-month follow-up period for those treated with non-surgical mechanical debridement combined with adjunctive EMD (EMD group), while there was limited improvement for those treated by mechanical debridement alone (control group). PD also decreased (4.5 to 3.12 mm) in EMD group whereas an increase to 5.17 mm was demonstrated in the control group. For cases diagnosed with peri-implantitis, the high prevalence rate (83% - 100%) of BoP at baseline was significantly reduced in 2 prospective studies at the 2-10-years follow-up after surgical debridement, surface decontamination with bone graft, and EMD application. However, there was no statistical difference between surgical treatment with or without adjunctive EMD application in the other randomized controlled trials (RCTs) and half of the implants still demonstrated persistent BoP. Moreover, the PD can also be reduced significantly from 8.12 to 3.17 mm for those treated with adjunctive EMD while the RBL reduced from 4.41 to 2.31 mm at 2-10 year follow-up. The overall survival rate was 85-100% at 2-10 years follow-up. Conclusion: This review investigated the efficacy of adjunctive EMD for treating peri-implant diseases and was able to demonstrate its effect in reducing PD, reducing BoP, and increasing survival rate of treated implants from 2 to 10 years. The beneficial impacts of traditional surgical therapy on implants diagnosed with peri-implantitis were investigated; however, in terms of treating peri-implantitis, the definite efficacy of adjunctive usage of EMD should be determined based on more quantitative analysis and research in future.\u0000 \u0000","PeriodicalId":150986,"journal":{"name":"Journal of Periodontics and Implant Dentistry","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128648597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Bibliometric Analysis of the Journal of Taiwan Academy of Periodontology during 1996-2020","authors":"Chia-Wei Lu Chia-Wei Lu, Cathy Yi-Wen Tsai Chia-Wei Lu, Chia-Dan Cheng Cathy Yi-Wen Tsai, Mei-Chu Chen Chia-Dan Cheng, Siao-Han Chen Mei-Chu Chen, Chi-Hsiang Chung Siao-Han Chen, Cheng-Yang Chiang Chi-Hsiang Chung, Ren-Yeong Huang Cheng-Yang Chiang, Wan-Chien Cheng Ren-Yeong Huang","doi":"10.53106/261634032022040501001","DOIUrl":"https://doi.org/10.53106/261634032022040501001","url":null,"abstract":"\u0000 Purpose: The purpose of this study was to analyze the publication trends during the past 25 years (1996-2020) in The Journal of Taiwan Academy of Periodontology (J Taiwan Periodontol). Material and Methods: The search strategy consisted of a manual search of the J Taiwan Periodontol in the library from September 1996 to December 2004, and an electronic search of the Taiwan Academy of Periodontology (TAP) website and Airiti Library for all the publications from March 2005 to December 2020. The bibliometric parameters, including year of publication, study design, scope of study, Taiwanese institute of origin, inter-in- stitute collaboration, authorship, inter-nation collaboration, and funding resource, were analyzed. Multivariable linear regression was used to analyze the publications trends. Sig- nificance was accepted when the P value was < 0.05. Results: The study design of reviews and case report/series consisted of the majority of publications, and the number of publications has been steady throughout the investigat- ed time periods (1996-2000, 2001-2005, 2006-2010, 2011-2015, 2016-2020). However, cross-sectional studies declined significantly throughout the time periods (P <0.001). Pub- lication trends have been changing, and the frequency distribution of articles published relating to implantology has been significantly arising (P <0.001). The number of articles with single author published in the J Taiwan Periodontol has been decreasing statistically (P <0.001), in other words, the number of authors participating in a study has been increasing, sometimes amounting to more than five authors (P <0.001). Meanwhile, the frequency dis- tribution of single-instituted collaboration has decreased statistically. Conclusion: This is the first study provides valuable information regarding the breadth of study design, scope of study, institute of origin, inter-institute collaboration, authorship, inter-nation collaboration, and funding resource of articles published in the J Taiwan Perio- dontol. The trends of publications have changed within the time periods.\u0000 \u0000","PeriodicalId":150986,"journal":{"name":"Journal of Periodontics and Implant Dentistry","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131621618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Bioactive Agents on Alveolar Ridge Augmentation: A Systematic Review and Meta-Analysis","authors":"Che-Hao Ting Che-Hao Ting, Yi-Wen Cathy Tsai Che-Hao Ting, Chia-Dan Cheng Yi-Wen Cathy Tsai, Wen-Hsiang Huang Chia-Dan Cheng, Da-Yo Yuh Wen-Hsiang Huang, 林詩淳 Da-Yo Yuh, Chih-Chi Sheen Shih-Chun Lin, Wan-Chien Cheng Chih-Chi Sheen","doi":"10.53106/261634032022040501006","DOIUrl":"https://doi.org/10.53106/261634032022040501006","url":null,"abstract":"\u0000 Objectives: This review aimed at investigating the impact of bioactive agents on alveolar ridge augmentation at peri-implant sites and edentulous ridges. Material and Methods: Electronic and manual literature searches were conducted for articles up to April 2021. Human randomized clinical trials, clinical trials, or retrospective studies reporting outcomes of alveolar ridge augmentation procedures with or without bioactive agents were included. Sinus lifting or extraction socket preservation articles were excluded in this study. A random-effect meta-analysis was conducted to investigate ridge dimensional changes and complication rate. Results: Overall, ten articles were included in the quantitative analysis. In bone width and height augmentation, the weighted mean difference (WMD) of the horizontal bone gain at edentulous ridges was 0.38 mm (95% CI = 0.07 to 0.69 mm, p = 0.02) when comparing sites with and without PRP/PRF. The WMD of the vertical bone gain at edentulous ridges was 0.46 mm (95% CI = 0.06 to 0.86 mm, p = 0.02) when comparing sites with and without platelet- rich plasma (PRP) or platelet-rich fibrin (PRF). When evaluating the effect of adjunctive use of bone morphogenetic proteins (BMPs) at alveolar ridge augmentation sites compared to alveolar ridge augmentation sites without BMP application, the WMD of the horizontal bone gain at edentulous ridges was 0.90 mm (95% CI = 0.30 to 1.49 mm, p = 0.003). In addition, the odds ratio of the titanium mesh exposure was 0.13 (95% CI of 0.02 to 0.71, p = 0.02). All analyses showed favorable outcomes at the sites with bioactive agent. Conclusion: Within the limits of this review, application of bioactive agents during alveolar ridge augmentation procedures presents increased horizontal and vertical bone augmentative changes. The complication rate can also be reduced with usage of PRP/PRF in titanium mesh-guided alveolar ridge augmentation.\u0000 \u0000","PeriodicalId":150986,"journal":{"name":"Journal of Periodontics and Implant Dentistry","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115846450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Management of External Cervical Resorption in Mandibular Molar Furcation Area - A Case Series","authors":"王玉珍 王玉珍, Liang-Yi Tsai Yu-Chen Wang, Yen-Wen Huang Liang-Yi Tsai, Wan-Chun Wen Yen-Wen Huang, Yi-June Lo Wan-Chun Wen","doi":"10.53106/261634032022040501004","DOIUrl":"https://doi.org/10.53106/261634032022040501004","url":null,"abstract":"\u0000 External cervical resorption (ECR) is an aggressive form of root resorption causing loss of tooth structure and sometimes leading to destruction of adjacent alveolar bone. In the advanced extent of ECR lesion, surgical intervention is inevitable. Several studies presented favorable treatment outcomes on advanced ECR lesions at single teeth. In the light of these studies, this article reports on surgical management of two ECR cases. Materials and Methods: Two cases had ECR combined with bony defect in left mandibular first molar. Case 1 had ECR lesion over buccal furcation area combined with buccal bone plate loss. Following root canal treatment, the resorptive defect was restored by mineral trioxide aggregate and the bony defect was treated with guided tissue regeneration (GTR). Case 2 had class II furcation defect with ECR over furcal surfaces of mesial and distal roots. The resorptive defect was restored with bioceramic putty and class II furcation bony defect was treated by GTR. Root canal treatment of tooth 36 was done later after case 2 suffered from symptomatic irreversible pulpitis of tooth 36. Result: At one-year follow-up of case 1, no inflammatory signs with probing pocket depth (PPD) less than 3mm clinically and regeneration of buccal bone plate radiographically were found of tooth 36. At half year follow-up of case 2, there was a healthy gingiva with PPD less than 3mm clinically and the furcation area has been partially filled with regenerated bone radiographically of tooth 36. Conclusion: These case series presented an interdisciplinary surgical management of two cases with external cervical resorption combined with bony defect over lower molar furcation area which were successfully treated with biocompatible restorative material in combination with GTR technique in short-term follow-up.\u0000 \u0000","PeriodicalId":150986,"journal":{"name":"Journal of Periodontics and Implant Dentistry","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116740503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accuracy Assessment of Static Computer-aided Implant Surgical Guide","authors":"Ping-Jung Hsieh Ping-Jung Hsieh, Yu-Lin Lai Ping-Jung Hsieh, Hsuan-Hung Chen Yu-Lin Lai, Ya-Chi Chen Hsuan-Hung Chen, Bor-Jian Chen Ya-Chi Chen, Jui-Ying Yen Bor-Jian Chen, Yi-Chen Hsieh Jui-Ying Yen, Yi-Chun Lin Yi-Chen Hsieh","doi":"10.53106/261634032022040501002","DOIUrl":"https://doi.org/10.53106/261634032022040501002","url":null,"abstract":"\u0000 As the progress of science and technology and its application in medical treatment, the static computer-aided surgical guide for implant surgery is commonly used nowadays. For achieving a more accurate implant position, factors affecting the accuracy of the computer- aided surgical guide are generally concerned. The aim of this article was to perform a comprehensive overview of literatures and assessment of patient-related, guide stent-related and surgery-related factors affecting the accuracy of the static computer-aided implant surgical guide. It could be concluded that the position of guide, types of tissue support, fixation of guide, types of guided surgery (totally or partially guided), the sleeve length, the key height, and the distance between the sleeve and the implant platform might influence the accuracy of static computer-aided implant surgery. Knowledge of factors related to the accuracy of the surgical guide can aid the clinician to place implants precisely and safety, prevent complications and achieve predictable outcomes.\u0000 \u0000","PeriodicalId":150986,"journal":{"name":"Journal of Periodontics and Implant Dentistry","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116609302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Age-Based Outcome Analysis of Comprehensive Non-Surgical Periodontal Therapy","authors":"蔡晴羽 蔡晴羽, 陳羿彣 Ching-Yu Tsai, Chen-Ying Wang Yi-Wen Chen, Che-Change Tu Chen-Ying Wang, Cheing-Meei Liu Che-Change Tu, Mark Yen-Ping Kuo Cheing-Meei Liu, 張博鈞 Mark Yen-Ping Kuo","doi":"10.53106/261634032022040501003","DOIUrl":"https://doi.org/10.53106/261634032022040501003","url":null,"abstract":"\u0000 Background: Aging has been considered a risk determinant for chronic periodontitis. The aim of the present study is to investigate the age effect on healing after a comprehensive non-surgical treatment (CNSPT). Methods: In the study, the clinical data of CNSPT in 2012 to 2014 at the Department of Periodontics, National Taiwan University Hospital, was collected. The collected data was stratified according to initial clinical attachment level (cut-off value of 5 mm), tooth site (incisors/canines, premolars, and molars), and age (20-40, 40-60, and > 60 year-old). The probing depth (PD) reduction, gingival recession (GR), clinical attachment level (CAL) gain, and keratinized tissue (KT) gain were evaluated. Results: The treatment data of 204 patients were analyzed. In the 20-40 year-old group, PD reduction in all teeth, and CAL gain in teeth with initial CAL ≥5 mm, were significantly greater relative to the > 60 year-old group. In teeth with initial CAL ≥5 mm , the linear regression analysis also revealed a significantly negative correlation between age and PD reduction/ CAL gain. Regarding tooth type, PD reduction and CAL gain were significantly negatively correlated with age in incisors and canines. Conclusions: Both PD reduction and CAL gain were slightly greater in younger receiving CNSPT, specifically for incisors and canines with initial CAL ≥ 5 mm.\u0000 \u0000","PeriodicalId":150986,"journal":{"name":"Journal of Periodontics and Implant Dentistry","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126152768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Soft Tissue Parameters and Esthetic Index Changes in Platform Switching Implant: A Systematic Review and Meta-Analysis","authors":"Wen-Yi Wei Wen-Yi Wei, Yu-Hsuan Chen Wen-Yi Wei, Chia-Dan Cheng Yu-Hsuan Chen, Yu Hsiao Chia-Dan Cheng, Cheng-En Sung Yu Hsiao, Guo-Liang Cheng Cheng-En Sung, Wan-Chien Cheng Guo-Liang Cheng","doi":"10.53106/261634032022040501005","DOIUrl":"https://doi.org/10.53106/261634032022040501005","url":null,"abstract":"\u0000 Purpose: The purpose of this study was to perform a systematic review and meta-analysis to critically evaluate the available literature to statistically analyze the effects of platform matched (PM) and platform switching (PS) implants on the peri-implant soft tissue changes and esthetic outcomes. Materials and methods: Electronic databases of the Cochrane Library, Embase, CINAHL and PubMed were searched for human randomized controlled trials (RCTs) with clearly outcome measurement in comparison between PM and PS implant. Primary outcomes included midfacial keratinized gingiva (KG) thickness, width of KG, marginal gingiva height gain, papilla height, and pink esthetic score. Secondary outcomes included bone level, probing depth, plaque index, and sulcus bleeding index. All the included studies had to follow up for at least 1 year after function. Results: A total of 7 RCTs were included in the meta-analysis. Midfacial KG thickness (weighted mean difference (WMD) = 1.34 mm, P < 0.0001), marginal gingiva height (WMD = 0.30 mm, P = 0.01), papilla height (WMD = 0.18 mm, P = 0.003), bone level (WMD = 0.34 mm, P < 0.00001) and probing depth (WMD = -0.22 mm, P = 0.002) demonstrated statistically difference in comparison of PS and PM implants. The result of width of KG (P = 0.92), PES score (P = 0.73), plaque index (P = 0.97) and sulcus bleeding index (P = 0.78) showed no statistical difference. Conclusion: Meta-analysis showed better performance of midfacial KG thickness, marginal gingiva height and papilla height in PS implant than that in PM implants. No statistically difference was found in width of KG and PES score between PS implants and PM implants.\u0000 \u0000","PeriodicalId":150986,"journal":{"name":"Journal of Periodontics and Implant Dentistry","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128035617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three-Dimensional Deviations in Immediate Implant Surgery Under the Aid of Traditional Surgical Stents","authors":"Mon-Hsuan Lin Mon-Hsuan Lin, Kang-Shou Hu Mon-Hsuan Lin, Yen-Ting Han Kang-Shou Hu, Chih-Long Chen Yen-Ting Han","doi":"10.53106/261634032022040501008","DOIUrl":"https://doi.org/10.53106/261634032022040501008","url":null,"abstract":"\u0000 This in vitro study aimed to evaluate the angular and positional deviations of immediate implant surgery under the aid of traditional surgical stents, and whether the surgeon’s experience affects the accuracy of placement was also evaluated. Materials and Methods: Implants were placed in fourteen maxillary models simulating immediate placement in the esthetic area by 3 groups of participants with different levels of surgical experiences under the aid of a traditional surgical stent. The cone-beam computed tomography (CBCT) scans of all models were superimposed to a previously planned virtual ideal position. The coronal/apical global deviations and angular deviations between simulated- and placed-position were measured and analyzed statistically. Results: The overall mean global deviations were 2.25 ± 0.67 mm at the platform and 2.79 ± 0.87 mm at the apex. The actual placement deviated significantly toward a distal and buccal angulation from the planned position, with the mean angular difference of -3.63 ± 5.56°and 2.80 ± 3.06 °, respectively (p < 0.001). The degree of distally angulated deviation together with coronal/apical global linear deviations and surgeons’ experience level were significantly negatively correlated (p < 0.001). The distal and buccal danger zones were mostly entered in cases handled by less experienced participants. Conclusion: In this in vitro study, the placement of immediate implants under the aid of traditional surgical stents tends to deviate toward distal and buccal angulations. Practitioners with less experience place implants into esthetic danger zones.\u0000 \u0000","PeriodicalId":150986,"journal":{"name":"Journal of Periodontics and Implant Dentistry","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123505985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}