上海口腔医学最新文献

{"title":"[Clinical analysis of 309 patients with 2 supernumerary teeth in the upper incisor area].","authors":"Xiaolin Liu, Qun Ren, Wenjing Liu, Xiaowei Feng, Wenya Du, Guiyun Ren","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To analyze and summarize the clinical characteristics of patients with two supernumerary teeth in the upper incisor area, in order to provide reference for clinical diagnosis and treatment.</p><p><strong>Methods: </strong>A total of 309 patients with two supernumerary teeth in the upper incisor area who were admitted to Hospital of Stomatology, Hebei Medical University from January 2017 to December 2021 were collected, their age, gender, reasons for medical treatment, and related information on supernumerary teeth were statistically analyzed. The growth direction, eruption status, morphology, and development of supernumerary teeth in different genders and age groups were grouped and analyzed. SPSS 21.0 software package was used for data analysis.</p><p><strong>Results: </strong>Among 309 patients, the average age was (8.21±3.89) years old, and the male to female ratio was 3.83∶1. The 6-12 years old group had the highest number of visits, with 205 cases (66.34%); 204 cases (66.02%) had 2 supernumerary teeth with inconsistent growth directions, 223 cases (72.17%) had 2 supernumerary teeth with inconsistent morphology, 194 cases (62.78%) had 2 supernumerary teeth with fully developed roots, 174 cases (56.31%) had 2 supernumerary teeth in an unexpired state. There was no significant difference(P＞0.05) in the growth direction, eruption status, development, treatment reasons, and impact on adjacent tissues between the two supernumerary teeth of different genders, but there was significant difference(P＜0.05) in morphology. There was significant difference in the growth direction of two supernumerary teeth in different age groups(P＞0.05), but there were significant differences in eruption status, morphology, development, medical reasons, and impact on adjacent tissues(P＜0.05).</p><p><strong>Conclusions: </strong>Patients with two supernumerary teeth in the upper incisor area are mostly seen in the mixed dentition period. The incidence rate of males is significantly higher than that of females. Gender has certain impact on the morphology of supernumerary teeth, and age has certain impact on the eruption, morphology, and development of supernumerary teeth.</p>","PeriodicalId":21709,"journal":{"name":"上海口腔医学","volume":"34 3","pages":"303-309"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144967631","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":"[Evaluation of the effect of simultaneous implantation of alveolar process dilation and guided bone regeneration in patients with severe deficiency of alveolar bone horizontal width].","authors":"Miao Yu, Rong Jin","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To explore the influence of alveolar process expansion, guided bone regeneration (GBR) and bone grafting for simultaneous dental implantation therapy on bone resorption volume, retention and masticatory function in patients with severe deficiency of alveolar bone horizontal width.</p><p><strong>Methods: </strong>Eighty patients with severely insufficient alveolar bone width who received dental implantation therapy in Hangzhou Stomatology Hospital were selected from January 2021 to January 2023. Totally 40 patients (55 teeth) who received alveolar process expansion combined with GBR bone grafting were included in the experimental group, while 40 patients (51 teeth) with traditional alveolar bone splitting were enrolled as the control group. Both groups were treated with dental implantation at the same time. The repair effect [bone healing time, diameter and implant stability quotient (ISQ)], occurrence of complications and subjective feeling scores (retention, pain and tooth aesthetics) 1 year after surgery, alveolar bone resorption volume (mesial and distal), periodontal related indicators [gingival sulcus depth (SPD), gingival sulcus bleeding index (SBI) and gingival index(GI)] and masticatory function (masticatory efficiency, occlusal force) before surgery and 1 year after surgery were compared between both groups.</p><p><strong>Results: </strong>The bone healing time in the experimental group was significantly less than that in the control group(P＜0.05). The total incidence rate of complications was significantly lower in the experimental group than that in the control group(P＜0.05). At 1 year after surgery, the alveolar bone resorption volume, SPD, SBI and GI in both groups were significantly reduced than those before surgery, and the indicators in the experimental group were much lower(P＜0.05). The masticatory efficiency and occlusal force in the experimental group were significantly enhanced compared to before surgery(P＜0.05), and the two indicators were significantly higher than those in the control group(P＜0.05). At 1 year after surgery, the retention function and pink esthetic score(PES) in the experimental group were significantly higher (P＜0.05) while the visual analogue scale(VAS) score was significantly lower than the control group (P＜0.05).</p><p><strong>Conclusions: </strong>Simultaneous dental implantation with alveolar process expansion combined with GBR bone grafting has good repair effect and safety for patients with severe bone width deficiency. It can help to reduce bone resorption volume, enhance retention stability after bone grafting, relieve pain and improve tooth aesthetics.</p>","PeriodicalId":21709,"journal":{"name":"上海口腔医学","volume":"34 3","pages":"262-266"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144967573","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 anatomy of the islanded pedicled nasolabial flap and its application in reconstruction of postoperative defects of T1-T2 stage carcinoma of the floor of mouth].","authors":"Xue Zhou, Rong Jin","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate the anatomic features of nasolabial flap pedicled with a facial artery and its application in repairing the defect after surgery of stage T1-T2 carcinoma of the floor of mouth.</p><p><strong>Methods: </strong>Dissections of the maxillofacial region were performed on 8 specimens of national adults fixed with 10% formaldehyde, and the anatomical pictures were analyzed using Image-Pro Plus 6.0 software. Nine patients were retrospectively reviewed from August 2015 to January 2024 for the repair of postoperative defects of stage T1-T2 carcinoma of the floor of mouth using nasolabial fold flaps with a facial artery perforator branch as vascular pedicle.</p><p><strong>Results: </strong>The external diameter of the facial artery at the lower border of the mandible was (2.05±0.98) mm. The main trunk of the facial artery traveled along the line from the beginning of the facial artery to the nasal blade and had a length of (90.89±3.79) mm. The main facial vein run along the line from the beginning of the facial artery to the medial canthus, and its length is (118.10±2.57) mm. The longest distance between the facial artery and the facial vein was (25.92±1.96) mm. Nine patients had a favourable postoperative outcomes without obvious complications.</p><p><strong>Conclusions: </strong>Repair of postoperative defects in middle-aged and elderly patients with T1-T2 stage carcinoma of the floor of mouth using a nasolabial fold flap can achieve satisfactory clinical outcomes.</p>","PeriodicalId":21709,"journal":{"name":"上海口腔医学","volume":"34 3","pages":"267-270"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144967575","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 new fixed Twin-block appliance in the treatment of adolescent patients with skeletal Class Ⅱ malocclusion].","authors":"Meng Ding, Wei Zhang, Qun Shen, Yucheng Chen, Hui Zhang, Feifan Ge, Mengyue Hang, Jianhua Wu","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the clinical effect of a new fixed Twin-block on adolescent patients with skeletal ClassⅡ malocclusion.</p><p><strong>Methods: </strong>Twenty-one patients aged 10-13 years with skeletal ClassⅡ malocclusion with mandibular retrusion were chosen for functional treatment using a new fixed Twin-block. Before and after treatment, panoramic and cephalometric films were taken, and the observation indexes were measured and recorded.</p><p><strong>Results: </strong>There was no loosening or destruction of the appliance during treatment, the mean duration of treatment was (11.42±1.78) months. The position of the mandible(SNB), the length of the mandible (Co-Gn), nasolabial angle (Cm-Sn-UL), condylar sagittal position(Pcd-S), the lower labial protrusion distances (LL-SnPg') were significantly increased (P＜0.05) after treatment, and the relative position of the maxilla and mandible (ANB), Y-axis angle(SGn/FH), the inclination of the maxillary incisors (U1/SN), and the depth of the mental-labial sulcus (Si-LLPg') reduced(P＜0.05). Maxillary position(SNA), posterior mandibular position(S Vert-Co), mandibular length(Go'-Me), the mandibular incisor inclination (IMPA), and upper and lower mesial incisor angles(U1/L1), protrusion of the upper lip (UL-SnPg') were changed but without significant difference(P＞0.05). The vertically orientated measurements of the vertical position of the lower dentition(Ll-MP), L6-MP, the vertical distance of the upper and posterior teeth (U6-PP), anterior height (N-Me), facial height index(S-Go'/N-Me), and mandibular plane angle (MP/SN) did not change significantly(P＞0.05), while the posterior height(S-Go'), the vertical position of the upper dentition(U1-PP), occlusal plane angle (SN/OP), mandible height (Ar-Go'), the mandible ramus height(Co-Go) was increased significantly (P＜0.05).</p><p><strong>Conclusions: </strong>New fixed Twin-block significantly promotes mandibular growth and provides effective vertical control, improves the facial profile by retracting the maxillary incisors, and the clinical effect is reliable.</p>","PeriodicalId":21709,"journal":{"name":"上海口腔医学","volume":"34 3","pages":"291-297"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144967486","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 Er:YAG laser combined with NaClO on the removal of root canal smear layer and dentin microhardness].","authors":"Xue Bai, Xiao Wang","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the effects of Er:YAG laser combined with NaClO on the removal of root canal taint layer, calcium hydroxide clearance and dentin microhardness.</p><p><strong>Methods: </strong>A total of 318 single-rooted extracted teeth collected from March 2021 to January 2024 were selected, the 13 mm root was taken and mechanically prepared and randomly divided into three groups, with 106 teeth in each group. The control group was rinsed with NaClO, the experimental group 1 was rinsed with NaClO combined with ultrasonic washing, and the experimental group 2 was treated with Er:YAG laser on the basis of NaClO. The removal of the smear layer was observed under electron microscope, and the microhardness of dentin post-treatment was assessed using a microhardness tester.</p><p><strong>Results: </strong>The clearance rate of calcium hydroxide in experimental group 2 was significantly higher than that in experimental group 1 and control group, and the stain layer scores of crown formula 1/3, root middle 1/3 and root tip 1/3 were significantly lower than those in the other 2 groups(P＜0.05). There was no significant difference between the initial and final microhardness of the three groups(P＞0.05).</p><p><strong>Conclusions: </strong>Er: YAG laser combined with NaClO can effectively enhance the removal effect of stain layer in root canal therapy, and has little effect on dentin microhardness.</p>","PeriodicalId":21709,"journal":{"name":"上海口腔医学","volume":"34 3","pages":"233-236"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144967568","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":"[Maxillary sinus floor wall typing and three-dimensional finite element modelling of maxillary sinus internal elevation].","authors":"Kai Zhu, Lidi Cheng, Yuqing Zheng, Qijun Sun","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the equivalent stress and displacement of maxillary sinus floor mucosa by three-dimensional finite element analysis under different types of maxillary sinus floor.</p><p><strong>Methods: </strong>Three-dimensional finite element models of three different maxillary sinus floor shapes (shallow concave, deep concave and convex) were established by three-dimensional reconstruction of maxillary sinus bones and mucosa. The process of applying dynamic impact load to the maxillary sinus floor was simulated by using the ejector during maxillary sinus lifting operation, and the biomechanical characteristics of different maxillary sinus floor mucosa during ejection was analyzed.</p><p><strong>Results: </strong>The equivalent stress and displacement of maxillary sinus floor mucosa were deep concave (0.518 90 MPa/0.002 955 mm), shallow concave (0.590 25 MPa/0.003 515 mm) and convex (0.623 56 MPa/0.003 660 mm). In the process of axial displacement of the ejector from 1-10 mm, the stress of the mucosa at the bottom of maxillary sinus increased uniformly.</p><p><strong>Conclusions: </strong>The equivalent stress level of mucosa is related to the morphology of sinus floor. Under the same load condition, the tension on mucosa increases obviously during internal lifting of convex maxillary sinus floor, which has an adverse effect during internal lifting operation.</p>","PeriodicalId":21709,"journal":{"name":"上海口腔医学","volume":"34 3","pages":"251-256"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144967582","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 and prognosis of piezosurgery combined with 45°contra-angle turbine drill in extraction of impacted mandibular wisdom teeth].","authors":"Xuemei Xie, Xiaojia Yu","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate the clinical effect of piezosurgery combined with 45°contra-angle turbine drill in extraction of impacted mandibular wisdom teeth.</p><p><strong>Methods: </strong>A total of 146 patients with impacted wisdom teeth at the median mandibular level admitted from June 2022 to June 2024 were randomly divided into control group and experimental group, with 73 cases in each group. The wisdom teeth in the control group were simply removed using 45° contra-angle turbine drill, while those in the experimental group were removed using piezosurgery combined with 45° contra-angle turbine drill. The treatment outcomes, postoperative pain, limited swelling and incidence of postoperative complications of the two groups were compared.</p><p><strong>Results: </strong>There was no significant difference in operation time between the two groups(P＞0.05), and the amount of blood loss in the experimental group was significantly lower than that in the control group(P＜0.05). The visual analogue scale(VAS) of pain in the experimental group was significantly lower than that of the control group on the 1st and 3rd day after surgery(P＜0.05). Immediately, 1 day and 3 days after surgery, the serum C-reactive protein (CRP) in the experimental group was significantly lower than that in the control group (P＜0.05). The score of facial swelling degree and proportion in the experimental group were significantly lower than those in the control group (P＜0.05), the reduction rate of mouth opening degree and the proportion of mouth opening restriction in the experimental group were significantly lower than those in the control group(P＜0.05). There were no significant differences in the total incidence of postoperative complications such as tongue numbness, lower lip numbness, adjacent tooth injury, dry socket and root fracture between the two groups(P＞0.05).</p><p><strong>Conclusions: </strong>Compared with only using 45° contra-angle turbine drill, the combination of piezosurgery for impacted mandibular wisdom teeth extraction can help reduce intraoperative bleeding, alleviate pain and swelling,improve the degree of limited mouth opening.</p>","PeriodicalId":21709,"journal":{"name":"上海口腔医学","volume":"34 3","pages":"298-302"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144967635","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":"[Role of minocycline-loaded silica nanospheres in the regulation of periodontitis inflammation in rats].","authors":"Jinxin Yang, Kexin Ding, Zhe Sun, Yawen Cui, Zongxiang Liu","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate the effect of minocycline hydrochloride(MH) loaded nano-silica microspheres(MSNion) on the inflammatory regulation of periodontitis in rats.</p><p><strong>Methods: </strong>Mesoporous silica(MSN) was prepared by classical St?ber method and MSNion was obtained by doping hydroxyapatite. MH was loaded into MSNion by magnetic stirring, and chitosan (COS), which had anti-inflammatory and antibacterial effect, was adsorbed on its surface by using charge interactions, forming MH@MSNion@COS microspheres. The microspheres were characterized by electron microscopy and X-ray diffraction. The experiments were divided into control, MH, MSNion@COS and MH@MSNion@COS groups. The cytotoxicity of each group was assessed using the CCK-8 cell assay and the optimal concentration was determined. The expression levels of inflammatory factors(TNF-α, IL-6, IL-1β, iNOS, IL-10) were determined in each group using ELISA kits. In periodontitis model, the rats were treated according to the grouping of cell experiments, periodontal probing depth (PD) and gingival index (GI) of the rats were measured at 0, 1, 2, 4 weeks. At 4 weeks of the experiment, the peripheral blood of each group of rats was collected, and the levels of inflammatory factors in serum were detected by ELISA kits.</p><p><strong>Results: </strong>Nanoparticles with a particle size of about 110 nm were prepared and observed as regular spheres by electron microscopy. MH@MSNion@COS degraded into fragments with unclear structure at the 8th day. In vitro drug release assay showed a slow release of MH, and the MH release rate reached 80% at about the 15th day. In cell experiment, MH@MSNion@COS showed the best cell proliferation activity at 50 μg/mL (P＜0.05), and the cell activity was higher than that of MH group and MSNion@COS group(P＜0.05). There was no significant difference between MH group and MSNion@COS group. ELISA results showed that the expression of inflammatory factors in MH@MSNion@COS group was significantly lower than that in LPS group at the first day(P＜0.01), and there was no significant difference between MH group and MSNion@COS group. At the 3rd day, the expression of M1 inflammatory factors in MH@MSNion@COS group was lower than that in control group, and the expression of M2 inflammatory factors was higher than that in control group(P＜0.05). PD and GI of MH@MSNion@COS group were significantly decreased after administration compared with other groups(P＜0.05), and the amount of inflammatory factors was lower than other groups(P＜0.05).</p><p><strong>Conclusions: </strong>MH@MSNion@COS has a good inflammatory regulation effect on experimental periodontitis in vitro and in vivo.</p>","PeriodicalId":21709,"journal":{"name":"上海口腔医学","volume":"34 3","pages":"244-250"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144967664","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 study of immediate placement at previously failed sites using simple taper-retained implants].","authors":"Jieting Dai, Yehao Xu, Bihui Ren, Hongwu Wei, Shuigen Guo","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the clinical efficacy of immediate replantation using simple taper fixed implants at failed implantation sites.</p><p><strong>Methods: </strong>Patients with implant failure at the Department of Stomatology, Fourth Affiliated Hospital of Nanchang University from January 2018 to December 2022 were collected. Simple taper-retained implants were used for immediate replantation at implant failure sites. Marginal bone loss, survival rate and complications were analyzed at immediate replantation(T0), immediately after repair(T1), and at the last follow-up(T2).</p><p><strong>Results: </strong>A total of 33 implantation failure sites in 31 patients were included at an average of (13.27±21.92) months after primary implantation, 33.33% were early failures and 66.67% were late failures; the average follow-up after immediate reimplantation was (14.22±9.90) months, with an overall retention rate of 100%. History of periodontitis, smoking, systemic diseases, and nocturnal grinding conditions, occlusal relationship, and bone type at the implant site had no significant difference in the effect of peri-implant marginal bone resorption; the difference between the mean implant length and the implant length at primary implantation was not statistically significant, but there was significant difference in the implant diameter and implantation depth between the primary implantation and the reimplantation. Binary Logistic regression model showed that the diameter of the implant had no significant effect on the survival rate of the implant, but the deeper the implant depth, the higher the survival rate of the implant.There was significant bucco-lateral bone height resorption at T0 and T1, but no significant changes in proximal and distal mesial heights, lingual bone heights, and buccolingual bone thickness at T0, T1, and T2. Buccolingual lateral bone height had the least amount of resorption in the T2-T1 period, which was statistically different from the amount of bone resorption in the T1-T0 and T2-T0 periods. Buccolingual lateral bone thickness was statistically different from the amount of bone change in the T1-T0 and T2-T1 periods, but there was no significant change in proximal and distal mesial heights, buccolingual lateral bone heights, and lingual lateral bone thicknesses in the T1-T0, T2-T1, and T2-T0 periods.</p><p><strong>Conclusions: </strong>The application of simple taper fixed implant system for immediate replantation at failed implant sites has good short-term clinical effects, and immediate replantation can be considered in the event of implant failure.</p>","PeriodicalId":21709,"journal":{"name":"上海口腔医学","volume":"34 3","pages":"310-317"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144967554","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":"[Evaluation of the effect of cruciform tooth division and T-type crown amputation in extraction of mandibular middle and low impacted teeth].","authors":"Jie Liu, Ying Wang, Zhenfei Liu","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluation the effect of cruciform tooth division and T-type crown amputation in extraction of mandibular middle and low impacted teeth.</p><p><strong>Methods: </strong>A total of 81 patients with mandibular middle and low impacted teeth treated in Bozhou People's Hospital from September to November 2024 were selected. According to the different extraction methods,they were divided into the control group(n=40, T-type crown amputation) and experimental group(n=41, cross tooth extraction). The operative time, intraoperative complications(anxiety, broken root), postoperative complications (pain, swelling and restricted mouth opening), healing of tooth extraction socket 1 week after surgery, and quality of life before and 1 week after surgery[oral health impact scale 14(OHIP-14)] were compared between the two groups.</p><p><strong>Results: </strong>The operative time of the experimental group was significantly shorter than that of the control group, the total incidence of intraoperative complications(4.88%) was significantly lower than that of the control group (20.00%), the score of postoperative pain and mouth opening restriction was significantly lower than that of the control group, the degree of postoperative swelling was significantly less than that of the control group, and the total incidence of postoperative complications(4.88%) was significantly lower than that of the control group(32.43%). The healing score of tooth socket 1 week after operation was significantly lower than that of the control group (P＜0.05). One week after surgery,the OHIP-14 score of both groups was decreased,and the experimental group was significantly lower than the control group(P＜0.05).</p><p><strong>Conclusions: </strong>Compared with T-type crown amputation, cruciform tooth division can shorten the operation time of mandibular middle and low impacted tooth extraction, reduce the occurrence of intraoperative anxiety, broken root, postoperative pain, swelling and restricted mouth opening, and is conducive to the healing of tooth extraction wound.</p>","PeriodicalId":21709,"journal":{"name":"上海口腔医学","volume":"34 3","pages":"271-275"},"PeriodicalIF":0.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144967629","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}