期刊文献+
共找到405篇文章
< 1 2 21 >
每页显示 20 50 100
Clinical Efficacy of GBR Technique Combined with Temporary Bridgework-Guided Gingival Contouring in Treating Upper Anterior Tooth Loss with Labial Bone Defects
1
作者 Yu Ma Jirui Ma 《Journal of Clinical and Nursing Research》 2024年第6期171-176,共6页
Objective:To investigate the clinical effect of the guided bone regeneration(GBR)technique combined with temporary bridgework-guided gingival contouring in treating upper anterior tooth loss with labial bone defects.M... Objective:To investigate the clinical effect of the guided bone regeneration(GBR)technique combined with temporary bridgework-guided gingival contouring in treating upper anterior tooth loss with labial bone defects.Methods:From July 2023 to April 2024,80 patients with upper anterior tooth loss and labial bone defects were admitted to the hospital and selected as evaluation samples.They were divided into an observation group(n=40)and a control group(n=40)using a numerical table lottery scheme.The control group received treatment with the GBR technique,while the observation group received treatment with the GBR technique combined with temporary bridges to guide gingival contouring.The two groups were compared in terms of clinical red aesthetic scores(PES),labial alveolar bone density,labial bone wall thickness,gingival papillae,gingival margin levels,and patient satisfaction.Results:The PES scores of patients in the observation group were higher than those in the control group after surgery(P<0.05).The bone density of the labial alveolar bone and the thickness of the labial bone wall in the observation group were higher than those in the control group.The levels of gingival papillae and gingival margins were lower in the observation group after surgery(P<0.05).Additionally,patient satisfaction in the observation group was higher than in the control group(P<0.05).Conclusion:The GBR technique combined with temporary bridge-guided gingival contouring for treating upper anterior tooth loss with labial bone defects can improve the aesthetic effect of gingival soft tissue,increase alveolar bone density and the thickness of the labial bone wall,and enhance patient satisfaction.This approach is suitable for widespread application in healthcare institutions. 展开更多
关键词 Upper anterior teeth loss labial bone defects Guided bone regeneration(GBR)technique Temporary bridgework-guided gingival contouring
暂未订购
Efficacy evaluation and influencing factors analysis of combined estrogen in the treatment of labial adhesion in children 被引量:2
2
作者 Jiale Li Yan Yang +1 位作者 Zhaoqi Huang Xiaolan Mo 《Journal of Chinese Pharmaceutical Sciences》 CAS CSCD 2021年第12期976-985,共10页
In the present study, we aimed to assess the effect of combined estrogen cream on young girls’ labial adhesions, and to identify the possible factors affecting the treatment outcome. We retrospectively included 123 c... In the present study, we aimed to assess the effect of combined estrogen cream on young girls’ labial adhesions, and to identify the possible factors affecting the treatment outcome. We retrospectively included 123 children with labial adhesions.Variables were collected, including treatment outcomes, conjugated estrogen usage, and dosage, whether it was combined with manual or surgical separation, whether to use erythromycin, and whether to be accompanied with vulvitis. Chi-square test, Fisher’s exact test, and t-test were used to analyze the correlation between influencing factors and treatment outcome in univariate analysis.We used logistic regression analysis to explore the key influencing factors. The use of conjugated estrogen in combination with manual or surgical separation(P = 0.001), and the degree of labial adhesions(P = 0.011) had significant effects on the final treatment outcome.The frequency of conjugated estrogen treatment, whether erythromycin was used in combination during treatment, and whether the children were accompanied by vulvitis had no significant effect on the treatment outcome(P > 0.05). After the logistic regression,we found that whether it was combined with manual or surgical separation(P = 0.000, OR = 0.078, 95% CI = 0.030–0.203), and the degree of labial adhesions in children(P = 0.003, OR = 5.324, 95% CI = 1.767–16.041) were independently related to the effect of conjugated estrogen treatment. The therapeutic effect of conjugated estrogen alone was better for mild adhesion. However,severe adhesions need to consider with manual or surgical separation in combination with conjugated estrogen treatment. It is not recommended to combine erythromycin with routine clinical treatment. Conjugated estrogen once a day can also achieve a good therapeutic effect. 展开更多
关键词 Combined estrogen labial adhesion Pediatrics&gynecology clinic Influencing factors
原文传递
Severe Labial Agglutination Release in a Postmenopausal Woman 被引量:1
3
作者 Rebecca James Anne Sammarco +1 位作者 David Sheyn Sangeeta Mahajan 《Open Journal of Obstetrics and Gynecology》 2014年第14期822-825,共4页
Labial agglutination occurs when the labia minora have become fused in the midline through either filmy or dense adhesions, forming a raphe. This condition is typically seen in pre-pubertal girls;however, there have b... Labial agglutination occurs when the labia minora have become fused in the midline through either filmy or dense adhesions, forming a raphe. This condition is typically seen in pre-pubertal girls;however, there have been cases reported in the literature of labial agglutination in postmenopausal and reproductive aged women. Labial agglutination has been associated with local irritation and inflammation in the setting of a hypoestrogenic state. Topical treatment is usually recommended prior to manual separation. However, some postmenopausal women have been refractory to conservative management, and surgery may then be required. We present a case of a 79-year-old Caucasian gravida 3 para 3 who was referred for treatment refractory labial agglutination for 3 years. The patient’s complaints included a small trickle escaping from the introitus during urination and the sensation of little urinary control. The patient underwent an exam under anesthesia. Gentle blunt dissection with a lacrimal dilator easily separated the labia minora down the visible midline fusion line (raphe). Bimanual exam then revealed a 12-week-sized enlarged uterus confirmed on ultrasound to be an 8 × 8 × 7 cm irregular mass concerning for uterine cancer. Proceeding to an operative release of severe labial agglutination can relieve patient discomfort and frustration when estradiol therapy has failed. In addition to alleviating symptoms, releasing labial agglutination can also provide the gynecologist access to critical screening procedures such as cervical cytology or a bimanual exam, all of which could lead to a diagnosis or pre-cancerous or cancerous lesions. 展开更多
关键词 labial AGGLUTINATION Hypoestrogenic STATE
暂未订购
Hemangioma in the lower labial vestibule of an eleven-year-old girl:A case report
4
作者 Ashwag Yagoub Aloyouny Afrah Jaber Alfaifi +3 位作者 Shahad Mohammed Aladhyani Ahad Ali Alshalan Hadeel Mohammed Alfayadh Hend Mahmoud Salem 《World Journal of Clinical Cases》 SCIE 2022年第5期1617-1622,共6页
BACKGROUND Hemangioma is a vascular benign tumour of endothelial origin.It appears commonly in the first decade of life with increases incidence in females.Hemangioma is not common to happen in the oral cavity and it ... BACKGROUND Hemangioma is a vascular benign tumour of endothelial origin.It appears commonly in the first decade of life with increases incidence in females.Hemangioma is not common to happen in the oral cavity and it is extremely rare to appear in the labial vestibule.CASE SUMMARY We present a case of an 11-year-old girl who complained of a painful,slowly growing mass which was consistent with the capillary hemangioma in the left mandibular vestibule.Vascular tumor such as hemangioma in the mandibular vestibule is extremely rare;hence,the clinical definitive diagnosis is very challenging.Therefore,radiographic imaging and histopathologic analysis are crucial to reach to the final diagnosis for proper management.CONCLUSION Comprehensive clinical evaluation,proper diagnostic imaging and microscopic analysis of the mass establish a precise diagnosis of the hemangioma for better management. 展开更多
关键词 Capillary hemangioma Vascular malformation labial vestibule CHILDHOOD Case report
暂未订购
Labial Fusion Causing Coital and Voiding Difficulty in a Young Woman
5
作者 Murat Ozekinci Selcuk Yucel +1 位作者 Cem Sanhal Munire Erman Akar 《Advances in Sexual Medicine》 2013年第1期11-13,共3页
Adhesions of the labia are extremely rare in the reproductive population with only a few cases described in the literature. We report a young female patient with coital and voiding difficulty. The patient was a 22-yea... Adhesions of the labia are extremely rare in the reproductive population with only a few cases described in the literature. We report a young female patient with coital and voiding difficulty. The patient was a 22-year-old woman presented with voiding difficulty and inability to achieve sexual intercourse. Clinical examination revealed normally developed labia majora, clitoris, and vaginal opening, but fused labia minora and pinhole external urethral orifice. Intraoperatively, labial fusion was dissected with sharp dissection. Urethral dilatation was performed with dittel dilators. Local estrogen ointment was administered postoperatively for four weeks resulting with complete resolution of coital and voiding symptoms. 展开更多
关键词 labial FUSION labial ADHESION
暂未订购
A Case Report of Immediate Implant Placement Combined with Flap Surgery,Guided Bone Regeneration and Non-submerged Healing with a Labial Bone Wall Defect in the Esthetic Zone
6
作者 Lu LIU Wenhui YU +2 位作者 Xitao LI Hui ZHAO Jianjun YANG 《Medicinal Plant》 CAS 2021年第4期53-55,60,共4页
[Basckground]This case report presented a methodology for immediate implantation in the esthetic zone with a facial bone defect along with flap surgery,guided bone regeneration,and non-submerged healing.[Case presenta... [Basckground]This case report presented a methodology for immediate implantation in the esthetic zone with a facial bone defect along with flap surgery,guided bone regeneration,and non-submerged healing.[Case presentation]A 27-year-old female patient was complaining of the aesthetic complication that was caused via metallic staining of the neck of ceramic crowns in the maxillary right anterior region for one year.She has experienced immediate implantation along with flap surgery,guided bone regeneration(GBR),and non-submerged healing.The torque of the implant reached to the 35 N·cm to confirm primary stability.Six months after surgery,the healing abutment and the implant were fixed,the gingiva was healthy in the surgical area,and the nearby teeth and the opposite teeth were normal.[Results]The results of cone-beam computer tomography(CBCT)revealed that bone defects were filled with the newly formed bone.At the same time,the final impressions accomplished,and an all-ceramic crown was fit-placed.As a whole,the patient satisfaction rate was high.[Conclusions]Immediate implant placement with flap surgery,GBR,and non-submerged healing with a facial bone wall defect in the esthetic zone is an achievable process. 展开更多
关键词 Case report Immediate implants labial bone defect Flap surgery Guided bone regeneration Non-submerged healing
暂未订购
A case of labial lentigines in Peutz-Jeghers syndrome treated using a Q-switched alexandrite laser
7
作者 Shuai Yang Hong Xu +2 位作者 Ying Zhang Changbo Tao Peisheng Jin 《Chinese Journal of Plastic and Reconstructive Surgery》 2021年第3期147-149,共3页
Peutz-Jeghers syndrome(PJS)is a polygenic autosomal dominant disease characterized by multiple gastrointestinal polyps and pigmentation of the mucosa and skin.While there are a few reports regarding successful treatme... Peutz-Jeghers syndrome(PJS)is a polygenic autosomal dominant disease characterized by multiple gastrointestinal polyps and pigmentation of the mucosa and skin.While there are a few reports regarding successful treatment of intestinal polyps in PJS,there is little research regarding treatment of mucocutaneous melanosis.This study investigated the many advantages of using a Q-switched alexandrite laser to treat mucocutaneous melanosis.In this case,a 19-year-old male with PJS presented with labial lentigines and received two Q-switched alexandrite laser treatments in 2018.Subsequently,the efficacy of the treatment was evaluated.The result of the evaluation was that,after the two laser treatments,the labial lentigines were successfully removed,and there were no complications. 展开更多
关键词 labial lentigines Peutz-jeghers syndrome Q-switched alexandrite laser TREATMENT
暂未订购
Construction and Application of a Perioperative Clinical Care Pathway for Labial Glands Biopsy in Sjögren’s Syndrome
8
作者 Li Wang Junjun Liu 《Yangtze Medicine》 2025年第1期78-85,共8页
Objective:To explore the application effect of clinical nursing pathway(CNP)in the perioperative period of labial glands biopsy for patients with Sjögren’s syndrome.Methods:A total of 150 inpatients with Sjö... Objective:To explore the application effect of clinical nursing pathway(CNP)in the perioperative period of labial glands biopsy for patients with Sjögren’s syndrome.Methods:A total of 150 inpatients with Sjögren’s syndrome who underwent labial gland biopsy in the Department of Rheumatology and Immunology of a tertiary hospital in Jingzhou City from May 2022 to April 2024 were selected by convenience sampling.Among them,75 patients from May 2022 to April 2023 were assigned to the control group,and 75 patients from May 2023 to April 2024 were assigned to the observation group.The control group received routine care,while the observation group was intervened with the clinical nursing pathway on the basis of the control group.The incidence of postoperative adverse reactions,pain degree,and wound healing time were compared between the two groups.Results:The implementation of perioperative management of labial glands biopsy according to the clinical pathway showed statistically significant differences after intervention(P<0.05).Conclusion:The construction and implementation of the clinical nursing pathway table for the perioperative period of labial glands biopsy in patients with Sjögren’s syndrome can reduce the incidence of postoperative wound adverse reactions,alleviate the pain degree of patients,shorten the wound healing time,and improve patient satisfaction. 展开更多
关键词 Sjögren’s Syndrome labial Glands Biopsy Clinical Care Pathways
暂未订购
高频超声引导下唇腺活检术在干燥综合征疑诊患者中的临床应用
9
作者 吴凡 周静 +2 位作者 潘新 何奕坤 何峥 《海军军医大学学报》 北大核心 2025年第8期1090-1094,共5页
目的探讨运用高频超声引导的唇腺活检术在干燥综合征(SS)疑诊患者中的临床应用价值。方法选择2022年9月至2024年12月在上海中医药大学附属曙光医院风湿免疫科及超声医学科行唇腺活检术的126例临床疑似SS且累及涎腺的患者作为研究对象,其... 目的探讨运用高频超声引导的唇腺活检术在干燥综合征(SS)疑诊患者中的临床应用价值。方法选择2022年9月至2024年12月在上海中医药大学附属曙光医院风湿免疫科及超声医学科行唇腺活检术的126例临床疑似SS且累及涎腺的患者作为研究对象,其中2022年9月至2023年2月接受传统切除法唇腺活检的患者为对照组(n=53),2023年3月至2024年12月接受高频超声引导下唇腺活检的患者为超声引导组(n=73)。统计分析两组患者的取材成功率、获取涎腺小叶个数、创面愈合时间、不良反应发生率。结果超声引导组取材成功率(100.00%,73/73)高于对照组(92.45%,49/53),获取的涎腺小叶个数多于对照组[6(6,7)vs6(5,6)],创面愈合时间短于对照组[4(4,5)dvs5(5,6)d],差异均有统计学意义(均P<0.05)。超声引导组1例(1.37%)患者出现术后不良反应,对照组5例(9.43%)患者出现不良反应,两组术后不良反应发生率差异无统计学意义(P>0.05)。结论高频超声可清晰定位唇腺腺体位置,提高取材成功率,缩短创面愈合时间,值得在临床推广应用。 展开更多
关键词 干燥综合征 唇腺 活体组织检查 高频超声 涎腺
原文传递
基于CBCT分析上颌美学区牙齿唇侧骨板形态与覆[牙合]覆盖关系的临床研究
10
作者 张淼 刘洁 +1 位作者 庄友梅 陈晓涛 《中国美容医学》 2025年第7期7-10,共4页
目的:基于锥形束计算机断层扫描(CBCT)分析上颌美学区牙齿唇侧骨板形态与覆[牙合]覆盖的关系。方法:选取2020年1月-2023年10月于新疆维吾尔自治区人民医院接受口腔检查的125例志愿者为研究对象,共选取230颗上颌中切牙,患者均接受CBCT检... 目的:基于锥形束计算机断层扫描(CBCT)分析上颌美学区牙齿唇侧骨板形态与覆[牙合]覆盖的关系。方法:选取2020年1月-2023年10月于新疆维吾尔自治区人民医院接受口腔检查的125例志愿者为研究对象,共选取230颗上颌中切牙,患者均接受CBCT检查,并系统自带软件测量并记录患者颌中切牙唇侧骨板厚度以及嵴顶高度、冠根比、牙槽骨与牙体长轴夹角、唇侧倒凹以及覆[牙合]覆盖情况,并分析其关系。结果:125例志愿者的230颗上颌中切牙的唇侧骨板厚度为(1.12±0.34)mm,嵴顶高度为(2.01±0.89)mm;覆[牙合]覆盖深度分别为(3.08±1.17)mm、(3.66±1.29)mm;上颌中切牙冠根比为0.94±0.21,且上颌中切牙冠根比分型与覆[牙合]分型比较差异有统计学意义(P<0.05);上颌中切牙牙槽骨与牙体长轴夹角为(15.68±4.73)°,且牙槽骨与牙体长轴夹角分型与覆盖分型及覆[牙合]分型比较差异均有统计学意义(P<0.05);上颌中切牙唇侧倒凹发生有无以及最凹点位置与覆盖分型比较差异均有统计学意义(P<0.05)。结论:上颌美学区中切牙牙齿唇侧骨板形态与其覆[牙合]覆盖存在明显关系,临床采取即刻种植时需关注牙齿唇侧骨板具体形态,以降低风险。 展开更多
关键词 上颌美学区 锥形束计算机断层扫描 唇侧骨板厚度 唇侧倒凹 覆[牙合]覆盖
暂未订购
三种手术入路拔除上颌前牙中线区高位埋伏多生牙临床对照研究
11
作者 程旭 郑先雨 +3 位作者 丁丁 黄姗姗 吴晓婷 张亨国 《口腔医学》 2025年第5期342-346,354,共6页
目的本研究旨在评估不同手术入路在拔除上颌前牙区高位中线区埋伏多生牙中的疗效和安全性。我们比较了三种手术入路:经唇侧、腭侧以及上唇系带旁纵形入路。方法研究纳入了2024年1月至9月在安徽医科大学附属口腔医院口腔颌面外科接受治疗... 目的本研究旨在评估不同手术入路在拔除上颌前牙区高位中线区埋伏多生牙中的疗效和安全性。我们比较了三种手术入路:经唇侧、腭侧以及上唇系带旁纵形入路。方法研究纳入了2024年1月至9月在安徽医科大学附属口腔医院口腔颌面外科接受治疗的102例患者,通过随机数字表法将患者分为三组:唇侧入路组32例、腭侧入路组34例、上唇系带旁纵形入路组36例。我们记录并比较了各组的手术时间、去骨量、术后面中部肿胀、疼痛程度以及患者满意度。结果唇侧入路组和上唇系带旁纵形入路组的手术时间分别为(20.50±3.02)min和(21.66±2.31)min,均短于腭侧入路组的(29.19±3.40)min。腭侧入路组在术后面部肿胀和疼痛评分上显著低于其他两组(P<0.05),且在OHIP-14评分中表现最佳,表明患者满意度最高。然而,腭侧入路组的去骨量最大,为(91.19±9.86)mm^(3)。结论综合考虑,尽管腭侧入路在术后疼痛和肿胀控制以及患者满意度方面表现优异,但其手术时间长且去骨量较大。而上唇系带旁纵形入路和唇侧入路在各方面表现相近,未发现显著差异。因此,在拔除上颌前牙区高位中部埋伏牙时,选择手术入路需兼顾安全性、微创性以及患者满意度。 展开更多
关键词 多生牙 手术入路 上唇系带 手术时间 锥形束CT 视觉模拟评分法 微创 患者满意度
暂未订购
正畸治疗中前牙牙槽骨唇侧骨性凸起1例报道及文献回顾
12
作者 周伟 汤雅 +2 位作者 肖健平 郝静 谭葆春 《口腔疾病防治》 2025年第5期393-400,共8页
目的探讨正畸治疗中前牙牙槽骨唇侧骨性凸起的影响因素、形成机制及治疗方法,为临床提供参考。方法报道1例上前牙11、21缺失,12、22倾斜移动内收后导致唇侧骨性凸起、牙龈增生,进而进行牙周骨成形手术及牙龈成形术治疗的病例,并结合相... 目的探讨正畸治疗中前牙牙槽骨唇侧骨性凸起的影响因素、形成机制及治疗方法,为临床提供参考。方法报道1例上前牙11、21缺失,12、22倾斜移动内收后导致唇侧骨性凸起、牙龈增生,进而进行牙周骨成形手术及牙龈成形术治疗的病例,并结合相关文献分析前牙内收时牙槽骨的具体变化及其改建特点,总结正畸患者唇侧骨凸形成的影响因素、机制以及预防和治疗方法。结果牙周术后半年随访,12、22牙龈色形质良好,唇侧牙槽骨基本正常,效果稳定;患者对唇侧牙龈及骨外形满意。文献复习显示,唇侧骨性凸起多见于成年正畸患者,前牙内收的距离(>4 mm)和移动速度与其形成相关,主要机制可能是牙槽骨的差异改建。成年患者牙槽骨中活性成骨细胞和破骨细胞减少,代谢活性和总体细胞活性下降,降低了牙槽骨的反应性,导致前牙内收后,唇侧骨吸收不足。此外,牙槽间隔缺乏机械应力介导的牙周膜,该区域骨改建刺激减少,导致上前牙唇侧牙槽骨增厚。骨皮质和骨松质改建速率不一致,唇侧靠近牙根表面的松质骨增生活跃,而靠近外表面的皮质骨吸收缓慢,最终表现为唇侧牙颈部骨厚度增加。本研究病例分析表明,该病例上前牙内收距离约为6 mm,11、21缺失处牙槽骨因缺少牙周膜刺激,骨改建和吸收较少,表现为增生。唇侧骨性凸起的预防主要是控制前牙内收的速度和距离。体积较小的唇侧骨性凸起一般无需治疗,影响功能及美观的唇侧骨性凸起可采取牙周骨成形手术。结论正畸内收前牙后,唇侧牙槽骨有时会出现明显、坚硬的骨性凸起,这可能是唇侧不同区域牙槽骨改建效率差异所致。对于影响美观或功能的骨性凸起,可采取牙周骨成形手术。 展开更多
关键词 唇侧骨性凸起 骨疣 正畸治疗 内收前牙 内收距离 骨改建 牙槽骨 牙龈成形术 牙槽骨修整术
暂未订购
牛心包膜在美学区水平骨增量手术中的应用效果分析 被引量:1
13
作者 林季萩 莫安春 《口腔疾病防治》 2025年第3期203-211,共9页
目的探讨牛心包膜在美学区水平骨增量手术中的应用效果,评估其在引导骨再生术(guided bone regeneration,GBR)中的临床可行性。方法本研究通过医院医学伦理委员会审查批准。29例前牙区缺牙伴唇侧骨缺损的患者,应用牛心包膜结合颗粒状或... 目的探讨牛心包膜在美学区水平骨增量手术中的应用效果,评估其在引导骨再生术(guided bone regeneration,GBR)中的临床可行性。方法本研究通过医院医学伦理委员会审查批准。29例前牙区缺牙伴唇侧骨缺损的患者,应用牛心包膜结合颗粒状或块状骨移植物进行水平骨增量手术。以术前设计中的虚拟种植体为中心,测量术前(T0)、术后即刻(T1)及术后6个月(T2)不同时期种植体颈部及其以下1~5 mm处种植体唇侧骨板厚度,评估骨再生效果。记录术后患者的疼痛、肿胀视觉模拟评分(visual analog scale,VAS),以及是否有感染、伤口裂开等并发症发生。结果术后即刻,所有患者种植体唇侧骨板厚度显著增加,平均骨增量大于3 mm;术后6个月,骨增量保持较好,特别是在种植体颈部下方3~5 mm处唇侧骨板厚度均大于3 mm。VAS评分显示,术后疼痛及肿胀在术后3 d达到峰值,随后逐渐减轻,术后10 d恢复良好。随访期间无感染、伤口裂开等并发症发生。结论牛心包膜在美学区水平骨增量中具有良好的骨增量效果和生物相容性。 展开更多
关键词 牛心包膜 胶原膜 引导骨再生术 水平骨增量 美学区 唇侧骨板厚度 并发症
暂未订购
种植支抗联合转矩辅弓压低前牙的三维有限元分析
14
作者 许畅 姜明珠 +1 位作者 刘鑫 闫伟军 《中国组织工程研究》 北大核心 2026年第8期1971-1978,共8页
背景:对于深覆牙合与露龈笑患者,正畸治疗中常通过微螺钉种植体压低上前牙来打开咬合,但这一方法易引发前牙唇倾。转矩辅弓在正畸中具有独特的力学作用,其是否能够改善前牙唇倾并提升治疗效率值得深入研究。目的:借助有限元法模拟压低... 背景:对于深覆牙合与露龈笑患者,正畸治疗中常通过微螺钉种植体压低上前牙来打开咬合,但这一方法易引发前牙唇倾。转矩辅弓在正畸中具有独特的力学作用,其是否能够改善前牙唇倾并提升治疗效率值得深入研究。目的:借助有限元法模拟压低前牙场景,探究不同前牙唇倾度及转矩辅弓对牙齿移动的影响。方法:基于健康成人的口腔锥形束CT图像,构建不同中切牙及侧切牙唇倾度(105°,112°,120°)的上颌模型,在每组模型双侧上颌中切牙与侧切牙间植入微种植体,并加载60 g拉力;针对每组模型,分别设置转矩辅弓施加0.5,1.0,1.5 N的力及无辅弓,分析上前牙的初始位移、最大主应力分布和Von Mises等效应力分布。结果与结论:①应用转矩辅弓后,随着转矩值的增加,牙冠与牙根的移动方向改变,牙冠由唇向转变为舌向移动,牙根则从舌向转变为唇向移动,并且两者之间的位移差逐渐增大,同时牙根的压低量及牙冠的伸长量均呈现出增大态势;在相同转矩值时,随着牙齿唇倾度的增加,牙根及牙冠在各个方向上的位移量均逐渐变小;②各组模型的最大等效应力分布主要集中在牙颈部边缘和根尖部2个区域,应力值均在正常值范围以内,随着转矩值的增加,Von Mises等效应力逐渐增大;随着唇倾度的增加,Von Mises等效应力变化不显著;③最大主应力-拉应力主要集中在牙周膜的唇侧龈缘部位,压应力主要集中在根尖部,随着转矩值的增大,牙周膜的压应力及拉应力均随之增大;随着唇倾度的增加,牙周膜的应力变化不显著,其中超过1 N的转矩值可能会损伤根尖牙周组织健康;④结果表明,转矩辅弓既能提高前牙压低效率又能改善过度唇倾的前牙,有效控制牙齿转矩,但是为了防止牙根吸收,辅弓施加的力最好选择1 N以内。 展开更多
关键词 转矩辅弓 前牙压低 深覆牙合 微螺钉种植体 转矩 唇倾度 露龈笑 工程化口腔材料
暂未订购
个性化唇侧固定矫治器在前牙轻度拥挤非拔牙矫治中的表达效率评价 被引量:1
15
作者 毛晓燕 黄乐 +3 位作者 杨佳音 姜威 李凌宇 陈锡平 《上海口腔医学》 2025年第4期427-432,共6页
目的:评价个性化唇侧固定矫治器在前牙轻度拥挤非拔牙矫治中的表达效率。方法:选择32例前牙轻度拥挤的安氏Ⅰ类或Ⅱ类错(牙合)畸形患者,采用Insignia个性化唇侧矫治系统进行不拔牙矫治。收集矫治前、目标位以及矫治后的三维数字化牙列模... 目的:评价个性化唇侧固定矫治器在前牙轻度拥挤非拔牙矫治中的表达效率。方法:选择32例前牙轻度拥挤的安氏Ⅰ类或Ⅱ类错(牙合)畸形患者,采用Insignia个性化唇侧矫治系统进行不拔牙矫治。收集矫治前、目标位以及矫治后的三维数字化牙列模型,测量上下颌牙弓宽度和转矩,并计算扩弓效率。结果:上下颌矫治后牙弓宽度较矫治前明显提高(P<0.05),与目标牙弓宽度无统计学差异(P>0.05)。上颌牙位中,除第一前磨牙外,其余牙位实际扩弓量均显著小于目标扩弓量(P<0.05);下颌牙位中,除第一磨牙外,其余牙位实际扩弓量与目标扩弓量无显著差异(P>0.05)。上颌扩弓效率第一前磨牙最高、第一磨牙最低,下颌则是第二前磨牙最高、第一磨牙最低。除下颌第一磨牙外,上下颌多数牙位矫治前转矩与目标转矩、矫治前转矩与矫治后转矩均有显著差异(P<0.05);除上颌第二前磨牙外,其余牙位矫治后转矩与目标转矩无统计学差异(P>0.05)。结论:应用Insignia个性化唇侧矫治器治疗侧貌较好的前牙轻度拥挤病例,能高效扩宽牙弓,矫治效果接近目标位,但长期效果需进一步研究。 展开更多
关键词 个性化 唇侧矫治器 转矩 牙弓宽度 安氏Ⅰ类错(牙合)畸形 安氏Ⅱ类错(牙合)畸形
原文传递
种植术后前牙区唇侧骨板厚度对种植体颈部牙槽骨吸收的影响 被引量:1
16
作者 郭滨 许曼 马江敏 《中南医学科学杂志》 2025年第2期253-255,259,共4页
目的 探讨种植术后前牙区唇侧骨板厚度对种植体颈部牙槽骨吸收的影响。方法 选取上颌前牙缺失患者102例,根据术前唇侧骨板厚度分为≤1 mm组和1~2 mm组各51例。比较两组咬合、感染、骨吸收、角化龈宽度(KGW)及牙周状况。结果 ≤1 mm组垂... 目的 探讨种植术后前牙区唇侧骨板厚度对种植体颈部牙槽骨吸收的影响。方法 选取上颌前牙缺失患者102例,根据术前唇侧骨板厚度分为≤1 mm组和1~2 mm组各51例。比较两组咬合、感染、骨吸收、角化龈宽度(KGW)及牙周状况。结果 ≤1 mm组垂直骨吸收高于1~2 mm组,水平骨吸收低于1~2 mm组(P<0.05)。T3、T4时,≤1 mm组KGW均小于1~2 mm组(P<0.05)。与T0时比较,T4时两组牙菌斑指数、牙龈指数和龈沟出血指数均明显降低,且1~2 mm组改善更明显(P<0.05)。与T3时比较,T4时≤1 mm组红色美学指数(PES)、白色美学指数(WES)减小(P<0.05)。T4时≤1 mm组PES、WES低于1~2 mm组(P<0.05)。结论 唇侧骨板厚度1~2 mm时,表现出更轻微的垂直骨吸收、更宽的KGW及更理想的牙周状况和美学效果,但水平骨吸收较≤1 mm时更大。 展开更多
关键词 前牙种植区 唇侧骨板厚度 骨吸收 牙槽嵴 骨缺损
暂未订购
隐形矫治拔牙与非拔牙患者牙弓三维形态差异
17
作者 任蕾 郑泽 +1 位作者 张佳顺 张苗苗 《口腔疾病防治》 2025年第8期650-658,共9页
目的探讨隐形矫治拔牙与非拔牙患者下颌Spee曲线和下颌Wilson曲线整平的准确率、下颌后牙冠倾斜度、上下颌牙弓宽度及下颌切牙唇倾度变化,为研究隐形矫治器的治疗效果提供依据。方法本研究已获得单位医学伦理委员会批准。选取2016至202... 目的探讨隐形矫治拔牙与非拔牙患者下颌Spee曲线和下颌Wilson曲线整平的准确率、下颌后牙冠倾斜度、上下颌牙弓宽度及下颌切牙唇倾度变化,为研究隐形矫治器的治疗效果提供依据。方法本研究已获得单位医学伦理委员会批准。选取2016至2023年间使用隐形矫治器治疗的成人骨性I类患者,分为拔除4颗第一前磨牙组32例和非拔牙组33例。采集初始扫描模型(T1)、矫治方案设计模型(T2)、排齐整平后的扫描模型(T3),将不同时间点的扫描数据导出为STL格式文件,使用GOM Inspect 2019软件进行分析测量,临床效果(T1-T3)定义为AC,预期结果(T1-T2)定义为CC。探讨下颌Spee曲线、下颌Wilson曲线的整平准确率(AC/CC×100%)、下颌后牙冠倾斜度的变化、上下颌牙弓宽度的变化及下颌切牙唇倾度的变化。使用R4.3.2软件进行统计分析。结果拔牙组和非拔牙组下颌Spee曲线的整平准确率分别为3.2%和10.1%;拔牙组和非拔牙组下颌第一磨牙的整平准确率分别为9.5%和4.2%,下颌第二前磨牙的整平准确率分别为32.8%和25%。拔牙组下颌Wilson曲线的整平准确率为126%,而非拔牙组为704%。拔牙组和非拔牙组下颌后牙牙冠倾斜度的AC最大值均出现在第一磨牙,第二前磨牙最小(P<0.05);拔牙组第二前磨牙的CC最大,第一磨牙最小(P<0.05);非拔牙组第二磨牙的CC最大,第二前磨牙最小(P<0.05)。拔牙组上下颌牙弓宽度变化差异无统计学意义(P>0.05);非拔牙组上颌第一磨牙处及下颌第二前磨牙、第一磨牙处的牙弓宽度AC明显大于CC(P<0.05)。非拔牙组下颌第二前磨牙冠倾斜度的AC大于拔牙组(P<0.05),表现为更明显的牙冠颊向倾斜,而两组的下颌磨牙牙冠倾斜度AC与CC差异无统计学意义(P>0.05);拔牙组的下颌Spee曲线的CC大于非拔牙组(P<0.05),而两组的下颌Spee曲线的AC差异无统计学意义(P>0.05)。拔牙组和非拔牙组下颌切牙唇倾度的AC均小于CC,但均为正值,表示下颌切牙唇倾的程度增加。结论隐形矫治器下颌Spee曲线整平表达欠佳,下颌Wilson曲线整平存在过度表达趋势,患者下颌切牙唇倾度均增加;拔牙组牙弓宽度预测精准,非拔牙组牙弓宽度存在超预期扩展。 展开更多
关键词 隐形矫治器 下颌骨 Spee曲线 Wilson曲线 牙弓宽度 下颌牙冠倾斜度 下颌切牙唇倾度
暂未订购
Labial tip sensilla of Blissus leucopterus leucopterus (Hemiptera: Blissidae): Ultrastructure and behavior
18
作者 Gerald T. Baker Xiong Chen Peter W.K. Ma 《Insect Science》 SCIE CAS CSCD 2008年第3期271-275,共5页
The cuticular sensory receptors that are found on the apex of the labium of hemipterans play an important role in their feeding behavior. In this study we describe the ultrastructure, number, and distribution of sensi... The cuticular sensory receptors that are found on the apex of the labium of hemipterans play an important role in their feeding behavior. In this study we describe the ultrastructure, number, and distribution of sensilla on the labium apex of the chinch bug, Blissus leucopterus leucopterus. Each apical field of sensilla on the labium contains 11 uniporous peg sensilla and one sensillum chaeticum. The uniporous peg sensilla are innervated by 4-5 bipolar neurons that send dendrites in the lumen of each peg. Three neurons are associated with each sensillum chaeticum, two neurons have dendrites in the lumen of the sensillum, and the third dendrite ends in a tubular body at the base of the sensillum. Behavioral tests that involve chemical blockage of the sensory receptors show the importance of the labial sensilla in feeding behavior. Both morphological and behavioral evidence indicate that the labial sensilla have a chemosensitive function. 展开更多
关键词 behavioral tests chinch bug electron microscopy labial sensilla Nmethylmaleimide
原文传递
The cephalic labial gland secretions of two socially parasitic bumblebees Bombus hyperboreus (Alpinobombus) and Bombus inexspectatus ( Thoracobombus) question their inquiline strategy
19
作者 Nicolas Brasero Baptiste Martinet +7 位作者 Thomas Lecocq Patrick Lhomme Paolo Biella Irena Valterova Klara Urbanova Maurizio Cornalba Heather Hines Pierre Rasmont 《Insect Science》 SCIE CAS CSCD 2018年第1期75-86,共12页
Social parasitic Hymenopterans have evolved morphological, chemical, and behavioral adaptations to overcome the sophisticated recognition and defense systems of their social host to invade host nests and exploit their... Social parasitic Hymenopterans have evolved morphological, chemical, and behavioral adaptations to overcome the sophisticated recognition and defense systems of their social host to invade host nests and exploit their worker force. In bumblebees, so- cial parasitism appeared in at least 3 subgenera independently: in the subgenus Psithyrus consisting entirely of parasitic species, in the subgenus Alpinobombus with Bombus hy- perboreus, and in the subgenus Thoracobombus with B. inexspectatus. Cuckoo bumblebee males utilize species-specific cephalic labial gland secretions for mating purposes that can impact their inquiline strategy. We performed cephalic labial gland secretions in B. hyperboreus, B. inexspectatus and their hosts. Males of both parasitic species exhibited high species specific levels of cephalic gland secretions, including different main com- pounds. Our results showed no chemical mimicry in the cephalic gland secretions between inquilines and their host and we did not identify the repellent compounds already known in other cuckoo bumblebees. 展开更多
关键词 BUMBLEBEES Bombus hyperboreus Bombus inexspectatus cephalic labial gland secretions inquiline strategy social parasitism
原文传递
前牙美学区种植体边缘骨吸收的局部影响因素分析
20
作者 于浩洋 李文超 《中华老年口腔医学杂志》 2025年第2期138-143,共6页
种植修复已逐渐成为患者缺失牙修复的优选方案,尤其在前牙美学区,患者对修复后长期稳定的美学效果期望越来越高,也因此成为种植修复治疗的研究热点。牙槽骨的吸收改建对于种植修复而言无法避免,且受到多方面因素影响,现就前牙美学区种... 种植修复已逐渐成为患者缺失牙修复的优选方案,尤其在前牙美学区,患者对修复后长期稳定的美学效果期望越来越高,也因此成为种植修复治疗的研究热点。牙槽骨的吸收改建对于种植修复而言无法避免,且受到多方面因素影响,现就前牙美学区种植体边缘骨吸收的局部影响因素进行综述,从患者基础条件、手术过程及骨整合阶段、种植修复后阶段的影响因素进行分析,包括种植位点软组织厚度及唇侧骨厚度、牙周病、吸烟、种植体植入创伤、即刻修复、种植体与基台连接方式、修复体的连接方式、基台穿龈高度、修复体穿龈角度、种植体周围病、修复后咬合创伤、患者自身健康维护等因素,旨在为临床治疗提供参考,以利于提高前牙美学区种植修复的良好效果。 展开更多
关键词 种植体 美学区 骨吸收 唇侧骨
暂未订购
上一页 1 2 21 下一页 到第
使用帮助 返回顶部