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Influence of EDTA on Demineralization Rate of Dentine:Calcification Treatment in root canal Therapy

Journal of Materials Science & Technology 2014年第7期30卷 692-698页

作者： Yang Ji Min He Shijie Chang Xiaodong Zhang Huazhe Yang Department of Stomatology General Hospital of Shenyang Military Area Command College of Biomedical Engineering Chongqing Medical University College of Basic Medical Science China Medical University

The aim of this study was to investigate the influence of ethylenediaminetetraacetic acid （EDTA） irrigation on demineralization rate of dentine located in the apical third of root canal walls. Teeth were divided into A and B two groups. In group A, all of the teeth was irrigated with EDTA and NaOCI （sodium hypochlorite）, followed by cutting the apical third into slices longitudinally to examine the influence of EDTA on different portions of apical third of root canal. In group B, the apical third of a tooth was firstly cut into slices longitudinally, followed by coating the root canal walls with EDTA to in-situ observe the demineralization of dentine with different time. It was found that the influence of EDTA on root-canal was gradually increased from the apical to the upper end of the apical third for group A. In addition, the demineralization rate of dentine was remarkable in the first 25 min for group B. The diffusion of EDTA into root dentine would lead to potential damage to the dentine. Furthermore, demineralization rate curve was calculated.

关键词： Ethylenediaminetetraacetic acid (EDTA) root canal Demineralization Dentine

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A comparison between radiovisiography and clearing technique in the study of the root canal types

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Journal of Nanjing Medical University 2005年第6期19卷 321-324页

作者： Darning Wu Younong Wu Department of Endodontics the Stomatology Hospital Affiliated of Nanjing Medical University Nanjing 210029 China

Objective： To compare the radiovisiography （RVG） with the clearing technique using Kappa value in the study of the root canal types. Methods： One hundred recently extracted human maxillary first premolars were used. Standard periapical RVG images were taken from a buccolingual and mesiodistal direction. The specimens were then accessed, injected with ink, demineralized, dehydrated, and finally were cleared. The RVG images and the transparent teeth were examined by a trained endodontist, and the date of root canal types following Wu＇ s classification was collected. Results： The reliability of RVG was high for studies on simple root canals, but was poor for the studies on the multiple root canals. The Kappa value between the two techniques was 0.3793, indicating the agreement was poor. Conclusion： It is concluded that the limited value of RVG alone when studying certain aspect of the mot canal system. The resolution of the RVG system should be enhanced.

关键词： radiovisiography clearing technique root canal Kappa value

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Non-surgical management of dens invaginatus type IIIB in maxillary lateral incisor with three root canals and 6-year follow-up:A case report and review of literature

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World Journal of Clinical Cases 2022年第33期10卷 12240-12256页

作者： Suraj Arora Gurdeep Singh Gill Shahabe Abullais Saquib Priyanka Saluja Suheel M Baba Shafait Ullah Khateeb Anshad M Abdulla Shashit Shetty Bavabeedu Ahmed Babiker Mohamed Ali Mohamed Fadul A Elagib Department of Restorative Dental Sciences College of DentistryKing Khalid UniversityAbha 61421Saudi Arabia Department of Conservative Dentistry and Endodontics JCD Dental CollegeSirsa 125055India Department of Periodontics and Community Dental Sciences King Khalid UniversityAbha 61421Saudi Arabia Department of Pediatric Dentistry and Orthodontic Sciences King Khalid UniversityAbha 61421Saudi Arabia

BACKGROUND The presence of dens invaginatus(DI)complicates treatment of any tooth,from diagnosis to access cavity and biomechanical preparation and *** of successful non-surgical management of DI type IIIB in maxillary lateral incisor are ***,we report such a case,with three root canals and a long *** SUMMARY A 13-year-old female patient presented with mild pain in the maxillary right lateral incisor(#7)for 10-15 *** examination,the tooth was slightly rotated,with slight tenderness on percussion and grade I mobility but with no caries,pockets or restorations and non-vital pulp(via vitality tests).Radiographic examination revealed unusual configuration of the tooth’s root canals,with an enamel-lined invagination extending to the apex,suggesting the possibility of DI Oehler’s type IIIB and a periapical *** the access cavity lingually revealed one distinct buccal orifice and two distinct palatal orifices;under higher magnification of a dental operating microscope(DOM),the mesio palatal and disto-palatal orifices were observed as connected by a C-shaped *** root canals were prepared with hand K-files following a step-back technique,and obturated using a combination technique of lateral condensation and vertical *** the 6-year follow-up,the patient was asymptomatic,and the periapical radiography displayed significant healing around the apical end of the *** Proper knowledge of unusual root canal anatomy is required in treating *** methods of root canal treatment can successfully resolve such complex cases,facilitated by DOM and cone-beam computed tomography.

关键词： Dens invaginatus Maxillary lateral incisor Three root canals root canal Anatomy Treatment Case report

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Different endodontic treatments induced root development of two nonvital immature teeth in the same patient:A case report

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World Journal of Clinical Cases 2023年第11期11卷 2567-2575页

作者： Rong Chai Xiu Yang An-Sheng Zhang Department of Stomatology Xi'an International Medical Center Hospital Affiliated to Northwest UniversityXi'an 710061Shaanxi ProvinceChina

BACKGROUND Pulp revascularization is a novel way to treat immature teeth with periapical disease,and the technique has become increasingly well established in recent *** puncturing the periapical tissue,bleeding is induced,and a blood clot is formed in the root *** blood clot acts as a natural bioscaffold onto which mesenchymal stem cells from periapical tissue can be seeded and restore pulp vascularity,thus promoting root development as well as apical *** the effect of pulp revascularization is ideal,there are certain requirements for the apical condition of the *** apical barrier technique and apexification are still indispensable for teeth that cannot achieve ideal blood clot *** addition,a meta-analysis of several clinical studies concluded that pulp revascu-larization has no significant advantages over other *** SUMMARY A 10-year-old girl complained of pain in the right upper and lower posterior teeth for 2 *** and radiological examinations revealed that both the right maxillary and mandibular second premolars were immature with periapical *** right maxillary second premolar was treated by pulp revascu-larization,while the right mandibular second premolar was treated by conven-tional apical barrier surgery after revascularization *** purpose of this report is to compare the different root maturation processes induced by the pulp revascularization and apical barrier techniques in the same patient in homonymous teeth from different *** months of follow-up showed that the apical foramen of both teeth presented a clear tendency to close;however,the tooth treated with pulp revascularization showed a significant increase in root length as well as root canal wall *** For the treatment of nonvital immature teeth,pulp revascularization showed a superior therapeutic effect in comparison with the apical barrier technique.

关键词： Nonvital immature tooth Central cusp deformity Pulp revascularization Apical barrier technique root canal Case report

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Endodontic treatment of the maxillary first molar with palatal canal variations: A case report and review of literature

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World Journal of Clinical Cases 2022年第32期10卷 12036-12044页

作者： Kai Chen Xing Ran Yan Wang Department of Stomatology Shanghai Tenth People's HospitalTongji University School of MedicineShanghai 200072China Department of Stomatology Shanghai Jiading District Center for Dental Disease Prevention and ControlShanghai 201899China Department of Stomatology Eye and Dental Diseases Prevention&Treatment of Pudong New AreaShanghai 201399China

BACKGROUND root canal variations frequently occur in maxillary first molars,which greatly affects the success of its *** second mesiobuccal(MB)root canal is the most common root canal ***,only a few studies have been conducted on palatal root canal ***,we report the presence of two separate root canals in a palatal root of the maxillary first *** SUMMARY A 39-year-old woman complained of pain in the maxillary right region for 1 year,which recently *** examination revealed a poorly restored right maxillary first molar and caries detected at the filling *** and heat test results indicated severe pain in the right maxillary first *** patient was diagnosed with irreversible pulpitis,and subsequently,root canal treatment(RCT)was *** total,five root canals were found in the maxillary first molar,including two separate root canals in the palatal *** was successfully performed using an endodontic microscope and cone-beam computed tomography(CBCT).The CBCT image revealed a vertucci type I canal morphology in the distobuccal root,while the MB and palatal root canals were typeⅣ.At the 1-mo follow-up,the maxillary first molar was completely asy-mptomatic,and the X-ray results indicated a successful ***,the ceramic crown restoration was *** An endodontic microscope and CBCT are useful in effectively identifying and treating root canal variations.

关键词： Molar root canal Endodontics Dental pulp cavity Pulpitis Case report

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心理督导对康复病人心理免疫的作用

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中国组织工程研究与临床康复 2001年第15期10卷 156-页

作者： LU Leping HE Xizheng WANG Hong Shenyang Army General Hospital

Background:The development of root of tooth lasted for 3～ 5 years after *** and apical periodontitis may contribute to the development stasis of root of tooth,and impair the masticatory *** order to improve the development of root of tooth and root apiex formation ,the induced formation of cement in root of tooth by drugs was very important in clinic. Objective:To investigate the effect of ultra－ short wave combined with antibiotics in the induction of root apiex and functional recovery of affected ***:Yung adults with Pulpitis and apical periodontitis were randomly divided into two groups,study group(41 teeth) and control group(20 teeth).All patients recepted the routine root canal preparation.3－ year X－ ray follow－ up was performed after treatment.

关键词：心理督导康复病人 root canal

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