中华口腔医学杂志最新文献

{"title":"[Digital design combined with endoscopic minimally invasive extraction of impacted mandibular third molars with roots in contact with the mandibular canal].","authors":"Y Wang, K N Chen, J Q Jiang, J L Wang, W Zhang, X L Xu","doi":"10.3760/cma.j.cn112144-20240512-00201","DOIUrl":"10.3760/cma.j.cn112144-20240512-00201","url":null,"abstract":"<p><p><b>Objective:</b> To study the clinical efficacy of digital design combined with three-dimensional (3D) printing model minimally invasive extraction of complex impacted mandibular third molars. <b>Methods:</b> Eight patients who visited the Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology from April 2023 to March 2024 were included, including 3 males and 5 females, aged from 27 to 57 years old. The impacted mandibular third molars of all patients were closely related to the mandibular canal, and part of the dental tissue entered the mandibular canal. Preoperative digital design was used to simulate the intraoperative tooth segmentation and bone removal operation of the power system and the segmented tooth dislocation path, and analyze the tooth extraction resistance. The mandibular teeth, mandibular canal and mandibular model were three-dimensionally printed using light-curing resin inkjet. During the operation, an endoscope was used combined with the 3D printed model to minimally invasively extract the impacted mandibular third molar. Quantitative sensory testing of the patient's lower lip skin on the operated side was performed before surgery, 2 days after surgery, and 7 days after surgery. Clinical data such as operation time were collected. A paired sample t test was performed on the 2 and 7 days postoperative data and the preoperative data to compare the data differences. <b>Results:</b> All 8 patients successfully completed preoperative design, model printing and minimally invasive surgery. The number of teeth segmented in the preoperative design was (4.4±1.3), and the number of teeth segmented in the actual operation was (4.0±1.1). The operation time was (33.3±13.0) min. None of the patients had postoperative numbness of the lower lip or other postoperative complication. It was observed endoscopically that the inferior alveolar neurovascular bundle was exposed in the extraction socket during the operation. The patient's pressure pain threshold 2 days after surgery (0.601±1.170) was significantly lower than before surgery (1.251±1.109) (<i>t</i>=2.83, <i>P</i>=0.025). <b>Conclusions:</b> For complicated impacted mandibular third molars, digital design combined with 3D printing model can be used to perform minimally invasive extraction with the assistance of an endoscope.</p>","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"59 12","pages":"1221-1227"},"PeriodicalIF":0.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142740661","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 pilot study on clinical application of three-dimensional morphological completion of lesioned mandibles assisted by generative adversarial networks].","authors":"Y Liang, Q Wang, Y Y Zhang, J J Huan, J Chen, H X Wang, Z Qiu, P X Liu, W J Ren, Y J Ma, C H Jiang, J D Li","doi":"10.3760/cma.j.cn112144-20240930-00367","DOIUrl":"10.3760/cma.j.cn112144-20240930-00367","url":null,"abstract":"&lt;p&gt;&lt;p&gt;&lt;b&gt;Objective:&lt;/b&gt; To explore the clinical application pathway of the CT generative adversarial networks (CTGANs) algorithm in mandibular reconstruction surgery, aiming to provide a valuable reference for this procedure. &lt;b&gt;Methods:&lt;/b&gt; A clinical exploratory study was conducted, 27 patients who visited the Department of Oral and Maxillofacial Surgery, Xiangya Hospital of Central South University between January 2022 and January 2024 and required mandibular reconstruction were selected. The cohort included 16 males and 11 females, with the age of (46.6±11.5) years; among them, 7 cases involved mandibular defects crossing the midline. The CTGANs generator produced 100 images, and the mean squared error (MSE) was calculated for differences between any two generated images. Preoperative cone-beam CT data from 5 patients were used to construct a labeled test database, divided into groups: normal maxilla, normal mandible, diseased mandible, and noise (each group containing 70 cross-sectional images). The CTGANs discriminator was used to evaluate the loss values for each group, and one-way ANOVA and intergroup comparisons were performed. Using the self-developed KuYe multioutcome-option-network generation system (KMG) software, the three-dimensional (3D) completion area of the mandible under cone-beam CT was defined for the 27 patients. The CTGANs algorithm was applied to obtain a reference model for the mandible. Virtual surgery was then performed, utilizing the fibular segment to reconstruct the mandible and design the surgical expectation model. The second-generation combined bone-cutting and prebent reconstruction plate positioning method was used to design and 3D print surgical guides, which were subsequently applied in mandibular reconstruction surgery for the 27 patients. Postoperative cone-beam CT was used to compare the morphology of the reconstructed mandible with the surgical expectation model and the mandibular reference model to assess the three-dimensional deviation. &lt;b&gt;Results:&lt;/b&gt; The MSE for the CTGANs generator was 2 411.9±833.6 (95%&lt;i&gt;CI&lt;/i&gt;: 2 388.7-2 435.1). No significant difference in loss values was found between the normal mandible and diseased mandible groups (&lt;i&gt;P&lt;/i&gt;&gt;0.05), while both groups demonstrated significantly lower loss values than the maxilla and noise groups (&lt;i&gt;P&lt;/i&gt;&lt;0.001). All 27 patients successfully obtained mandibular reference models and surgical expectation models. In total, 14 162 negative deviation points and 15 346 positive deviation points were observed when comparing the reconstructed mandible morphology with the surgical expectation model, with mean deviations of -1.32 mm (95%&lt;i&gt;CI&lt;/i&gt;:-1.33-&lt;i&gt;-&lt;/i&gt;1.31 mm) and 1.90 mm (95%&lt;i&gt;CI&lt;/i&gt;: 1.04-1.06 mm), respectively. &lt;b&gt;Conclusions:&lt;/b&gt; The CTGANs algorithm is capable of generating diverse mandibular reference models that reflect the natural anatomical characteristics of the mandible and closely match individual patient morphology, thereby facilitat","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"59 12","pages":"1213-1220"},"PeriodicalIF":0.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142740570","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 preliminary investigation of the key parameters of average value articulator based on mandibular movement trajectories in 100 adults with individual normal occlusion].","authors":"S Y Shan, Y J Zhu, J J Wang, A N Wen, Z X Gao, Q Z Qin, W B Li, Y Wang, Y J Zhao","doi":"10.3760/cma.j.cn112144-20240708-00262","DOIUrl":"10.3760/cma.j.cn112144-20240708-00262","url":null,"abstract":"<p><p><b>Objective:</b> To explore the method of obtaining the key parameters of the average value articulator in healthy people based on mandibular movement trajectory data, with a view to providing a reference for the clinical application of the average value articulator. <b>Methods:</b> One hundred healthy volunteers (42 males and 58 females) with individual normal occlusion, aged 18-55 years old, who met the inclusion criteria were recruited from Beijing, and their mandibular movement trajectory data were collected. The left and right sagittal condylar inclination(SCI) and transversal condylar inclination(TCI) were obtained from the values of the articulator parameters which were generated in the mandibular movement analysis system.The SCI and TCI were grouped by gender and calculated separately for the two groups and the overall sample; the gender differences in the two parameters and the differences between the mean values of the two parameters and the average value articulator empirical values (35° for SCI and 15° for TCI) for the overall sample were compared. <b>Results:</b> The differences between SCI (35.8°±7.4°) and TCI [11.2° (11.3°)] in males and the corresponding parameters [35.6°±8.3° and 10.8° (9.5°), respectively] in females were not statistically significant (<i>t</i>=0.10, <i>P</i>=0.922; <i>Z</i>=-0.60, <i>P</i>=0.552); the overall sample SCI (35.7°±7.9°) did not differ statistically from the average value articulator empirical value (<i>t</i>=1.23,<i>P</i>=0.221), and the overall sample TCI [10.9° (10.3°)] was significantly smaller than the average value articulator empirical value (<i>W</i>=5 825.00, <i>P</i><0.001). <b>Conclusions:</b> The mandibular movement trajectory data of 100 adults with individual normal occlusion in this study shows that the gender factor does not affect the setting of the key parameters of the average value articulator, the SCI of the average value articulator empirical values is appropriate, and the TCI has the possibility of being on the large side. In the clinical use of the articulator to assist in the design of restorations, the parameter values should be rationally adjusted according to the actual situation of the patient's dentition and mandibular movement.</p>","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"59 12","pages":"1228-1233"},"PeriodicalIF":0.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142740571","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":"[Application of surface landmark positioning in assisting cone-beam CT scanning of temporomandibular joint].","authors":"G Wang, J Z Wang, C Xu, J Zhao, L Q Xu","doi":"10.3760/cma.j.cn112144-20240523-00216","DOIUrl":"10.3760/cma.j.cn112144-20240523-00216","url":null,"abstract":"&lt;p&gt;&lt;p&gt;&lt;b&gt;Objective:&lt;/b&gt; To quantitatively measure the spatial relationship between the temporomandibular joint (TMJ) and surface landmarks such as the tragus and lateral canthus using cone-beam CT (CBCT), as to provide guidance for accurate positioning of CBCT scanning of the TMJ. &lt;b&gt;Methods:&lt;/b&gt; DICOM format data from 112 patients (35 males and 77 females with 224 TMJs) were included in this study. The patients were between 12 and 66 years old, with a mean age of (25.6± 9.8) years and they underwent initial visits at the Department of Stomatology, General Hospital of Chinese PLA. CBCT images were imported into Mimics Medical 21.0 software for three-dimensional reconstruction. The distance between selected surface landmarks and corresponding projection points on the same side of the TMJ were measured in both the sagittal and coronal planes. In the frontal view, the distance from the lateral canthus to the perpendicular line passing through the center of the condyle (d&lt;sup&gt;x&lt;/sup&gt;). In the lateral view, the vertical distance from the horizontal line through the rear edge convex of tragus to the roof of glenoid fossa (d&lt;sup&gt;y1&lt;/sup&gt;); the vertical distance from the horizontal line through the rear edge convex of tragus to sigmoid notch (d&lt;sup&gt;y2&lt;/sup&gt;); the distance from the tragus to the perpendicular line through the center of the condyle (d&lt;sup&gt;z&lt;/sup&gt;). The results were compared between different genders and age groups (adolescent group aged 12 to 18 years, 33 cases; adult group aged&gt;18 years, 79 cases). To verify the reliability and stability of the body surface landmarks obtained in this study, a comparison was made between the use of scout view positioning and the auxiliary positioning method that utilizes body surface landmarks to capture the mandibular condyle in a small field of view CBCT of the TMJ (scout view group, 25 cases; surface landmark-assisted positioning group, with 25 cases aged 12-18 years and 25 cases older than 18 years, totaling 50 cases), with regard to the deviation distance from the central point of the field of view to the central point of the mandibular condyle. &lt;b&gt;Results:&lt;/b&gt; A total of 112 patients with 224 TMJs were included in this study. In the frontal view, d&lt;sup&gt;x&lt;/sup&gt; was (8.59±3.13) mm, with no significant difference between the left and right sides, between males and females (&lt;i&gt;P&lt;/i&gt;&gt;0.05). Notably, the d&lt;sup&gt;x&lt;/sup&gt; in the adolescent group [(7.43±3.02) mm] was significantly smaller than that in the adult group [(9.07±3.06) mm] (&lt;i&gt;t&lt;/i&gt;=-3.68, &lt;i&gt;P&lt;/i&gt;&lt;0.001). In the lateral view, d&lt;sup&gt;y1&lt;/sup&gt; was (14.80±3.90) mm, showing no significant difference between the left and right sides, males and females, or different age groups(&lt;i&gt;P&lt;/i&gt;&gt;0.05). Similarly, d&lt;sup&gt;y2&lt;/sup&gt; was (6.82±3.95) mm, with no significant differences between the left and right sides or between males and females(&lt;i&gt;P&lt;/i&gt;&gt;0.05). However, the d&lt;sup&gt;y2&lt;/sup&gt; in the adolescent group [(5.88±4.13) mm] was significantly smaller than that in the ","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"59 12","pages":"1206-1212"},"PeriodicalIF":0.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142740622","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":"[Interpretation of \"Expert consensus under mild-to-moderate sedation and analgesia in oral diagnosis and treatment by non-anesthesiologists\"].","authors":"W Wang, W Zhang, L X Xu","doi":"10.3760/cma.j.cn112144-20240910-00341","DOIUrl":"10.3760/cma.j.cn112144-20240910-00341","url":null,"abstract":"<p><p>\"Expert consensus under mild-to-moderate sedation and analgesia in oral diagnosis and treatment by non-anesthesiologists\" formulated by Society of Sedation and Analgesia, Chinese Stomatological Association was officially released in 2023. The expert consensus proposes clinical recommendations in terms of basic requirements, implementation protocols, risk prevention, and complication management. This article interprets the expert consensus to facilitate readers' better understanding and application in clinical practice.</p>","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"59 12","pages":"1193-1196"},"PeriodicalIF":0.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142740751","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":"[Primary buccal mucosa intraductal carcinoma: a case report].","authors":"P Ren, S C Zhuo, L Y Gao, X Liu","doi":"10.3760/cma.j.cn112144-20240307-00101","DOIUrl":"10.3760/cma.j.cn112144-20240307-00101","url":null,"abstract":"","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"59 12","pages":"1258-1261"},"PeriodicalIF":0.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142740763","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":"[Progress in diagnosis of peri-implantitis].","authors":"M H Xu, Y J Qian, L Chen, M S Si","doi":"10.3760/cma.j.cn112144-20240525-00218","DOIUrl":"10.3760/cma.j.cn112144-20240525-00218","url":null,"abstract":"<p><p>Peri-implantitis is one of the most common biological complications after implant restoration which is difficult to be cured. Early and correct diagnosis is of great significance for the prevention and treatment of peri-implantitis. Although there have been consensus reports to make guiding suggestions in diagnosis, the diagnostic criteria are not uniform, resulting in many confusions. This review summarizes published consensuses on the diagnosis of peri-implantitis, analyzes the diagnostic values and limitations of traditional examination methods, and summarizes the recent advances in examination methods for peri-implant soft and hard tissues, aiming to provide a reference for clinical diagnosis of peri-implantitis.</p>","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"59 12","pages":"1262-1271"},"PeriodicalIF":0.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142740764","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 case of bone augmentation using three-dimensional printed individualized titanium mesh in anterior esthetic area].","authors":"J X Chen, Y M Zhou, S C Ren, H X Lyu, J X Luo, X L Sun","doi":"10.3760/cma.j.cn112144-20240704-00257","DOIUrl":"10.3760/cma.j.cn112144-20240704-00257","url":null,"abstract":"","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"59 12","pages":"1254-1257"},"PeriodicalIF":0.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142740659","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":"[Multidisciplinary treatment of a patient with combined periodontal-endodontic lesions resulting in severe alveolar bone defects: a case report].","authors":"L F Pan, D Shi, C Y Zheng","doi":"10.3760/cma.j.cn112144-20240512-00200","DOIUrl":"10.3760/cma.j.cn112144-20240512-00200","url":null,"abstract":"","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"59 12","pages":"1248-1253"},"PeriodicalIF":0.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142740753","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":"[Preliminary application study of digital technology for constructing three-dimensional facial symmetry reference planes in anterior dental esthetic restoration].","authors":"L J Ma, X H Yu, D Yin, Y J Zhu, Y Wang, Y J Zhao","doi":"10.3760/cma.j.cn112144-20240625-00250","DOIUrl":"10.3760/cma.j.cn112144-20240625-00250","url":null,"abstract":"<p><p><b>Objective:</b> To explore the impact of digital technology in constructing a three-dimensional (3D) symmetry reference plane (SRP) for esthetic restoration of anterior teeth and to evaluate its clinical applicability. <b>Methods:</b> A cross-sectional study was conducted from February to May 2024, involving 20 patients [11 males and 9 females, aged (36.8±11.4) years] who underwent anterior esthetic restorations at the Department of Stomatology, People's Hospital of Ningxia Hui Autonomous Region. Symmetrical reference planes of patients' 3D facial models were constructed using three different algorithms: weighted Procrustes analysis (WPA), Procrustes analysis (PA) based on the ontology-mirror correlation method, and iterative closest point (ICP). The SRP defined by an associate chief physician served as the control (true-value group). The angular errors between each algorithm group and the true-value group were compared. The optimal algorithm was selected and combined with a three-dimensional digital smile design (DSD) to create virtual patients, followed by designing anterior restorations. The visual analogue scale (VAS) was used by patients to score the aesthetic restoration results of the conventional design (control group) and the algorithm-based design (algorithm group). <b>Results:</b> The angular errors of the WPA, PA, and ICP groups were 1.43°±0.66°, 1.82°±0.88°, and 4.74°±2.03° respectively, with statistically significant differences among the groups (<i>F</i>=41.10, <i>P</i><0.001). Pairwise comparisons showed that the WPA group had significantly smaller angular errors compared to the PA and ICP groups (<i>P</i><0.05). The VAS scores for aesthetic restoration were significantly higher in the algorithm group (8.09±0.74) compared to the control group (6.30±1.38) (<i>t</i>=-5.49, <i>P</i><0.001). <b>Conclusions:</b> The SRP constructed using the WPA algorithm demonstrated minimal angular error when compared to the expert-defined SRP and is considered the optimal choice in clinical practice, yielding high patient satisfaction.</p>","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"59 12","pages":"1234-1239"},"PeriodicalIF":0.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142740758","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}