Tooth resorption refers to the loss of the organic and inorganic components of tooth structure by clastic cells. The complex and multifaceted nature of its aetiology, along with the several classification schemes published in the area, are likely to create confusion amongst researchers and clinicians, and may lead to compromised treatment decisions. Therefore, this paper will categorise and address tooth resorption based on aetiology in order to help clinicians diagnose and filter treatment options based on the pathophysiology of the resorption at hand. With recent advancements in the literature, the purpose of this paper is to provide clinicians with a current, clinically relevant summary of the various forms of tooth resorption, with a focus on aetiologically driven treatment strategies and suggestions that facilitate their recognition, diagnosis and management.
{"title":"The various forms of tooth resorption","authors":"Jordan Samuel Blum BSc, BBiomed (Hons)","doi":"10.1111/aej.12857","DOIUrl":"10.1111/aej.12857","url":null,"abstract":"<p>Tooth resorption refers to the loss of the organic and inorganic components of tooth structure by clastic cells. The complex and multifaceted nature of its aetiology, along with the several classification schemes published in the area, are likely to create confusion amongst researchers and clinicians, and may lead to compromised treatment decisions. Therefore, this paper will categorise and address tooth resorption based on aetiology in order to help clinicians diagnose and filter treatment options based on the pathophysiology of the resorption at hand. With recent advancements in the literature, the purpose of this paper is to provide clinicians with a current, clinically relevant summary of the various forms of tooth resorption, with a focus on aetiologically driven treatment strategies and suggestions that facilitate their recognition, diagnosis and management.</p>","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/aej.12857","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141156012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The study evaluated the spatial position of the mental foramen (MF) using 300 cone-beam computed tomography. The spatial position was analyzed with the horizontal location and relative location (distance between apical foramen and MF). The horizontal location was assessed through three positions (positions 1, 2, and 3). The relative location was determined with the x, y, and x coordinates of the root apex of mandibular premolars and the MF. Student's t-test and chi-square were performed. The most common horizontal location (52%) was position 2, which means between the premolars (p < 0.05). The relative location of the MF to the root apex of the second premolar was closer than the first premolar (p < 0.05). The distance between the root tip of the second premolar and the MF was 5.27 mm, with a minimum value of 1.87 mm. Clinicians should be aware of the possible neural results to the mental nerve of an endodontic infection and the extrusion of irrigation solutions.
该研究使用 300 锥束计算机断层扫描评估了心尖孔(MF)的空间位置。空间位置通过水平位置和相对位置(心尖孔与 MF 之间的距离)进行分析。水平位置通过三个位置(位置 1、2 和 3)进行评估。相对位置是根据下颌前磨牙根尖和中频的 x、y 和 x 坐标确定的。进行了学生 t 检验和卡方检验。最常见的水平位置(52%)是位置 2,即在前臼齿之间(p
{"title":"Mental foramen and apical foramen: A dangerous anatomical proximity","authors":"Deniz Yanık, Ahmet Mert Nalbantoğlu","doi":"10.1111/aej.12852","DOIUrl":"10.1111/aej.12852","url":null,"abstract":"<p>The study evaluated the spatial position of the mental foramen (MF) using 300 cone-beam computed tomography. The spatial position was analyzed with the horizontal location and relative location (distance between apical foramen and MF). The horizontal location was assessed through three positions (positions 1, 2, and 3). The relative location was determined with the x, y, and x coordinates of the root apex of mandibular premolars and the MF. Student's <i>t</i>-test and chi-square were performed. The most common horizontal location (52%) was position 2, which means between the premolars (<i>p</i> < 0.05). The relative location of the MF to the root apex of the second premolar was closer than the first premolar (<i>p</i> < 0.05). The distance between the root tip of the second premolar and the MF was 5.27 mm, with a minimum value of 1.87 mm. Clinicians should be aware of the possible neural results to the mental nerve of an endodontic infection and the extrusion of irrigation solutions.</p>","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141077291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Amanda Zambaldi Marim, Carlos Eduardo da Silveira Bueno, Carolina Pessoa Stringheta, Rina Andrea Pelegrine, Alexandre Sigrist De Martin, Daniel Guimarães Pedro Rocha, Wayne Martins Nascimento, Ana Grasiela Limoeiro, Carlos Eduardo Fontana
To use scanning electron microscopy and energy dispersive X-ray spectroscopy to evaluate the metallurgical-chemical changes of WaveOne Gold (WOG) and R-Motion (RM), after multiple uses. The instruments were divided into groups (n = 8): WOG and RM-control groups, new instruments; WOG1 and RM1; WOG2 and RM2; WOG3 and RM3 after instrumentation of 1, 2 or 3 molars, respectively. Burrs occurred mainly in the control group and after the first use. The RM files were found to have a higher nickel content, which increased during reuse, and a decrease in oxygen content with increasing reuse, in addition to calcium impregnation, which occurred in greater amounts in the corrosion areas in the WOG files. The presence of topographic and chemical changes was demonstrated, indicating that caution should be taken when reusing endodontic instruments to avoid fractures.
{"title":"In vitro study of structural and chemical changes in two reciprocating files after multiple reuses and sterilisation.","authors":"Amanda Zambaldi Marim, Carlos Eduardo da Silveira Bueno, Carolina Pessoa Stringheta, Rina Andrea Pelegrine, Alexandre Sigrist De Martin, Daniel Guimarães Pedro Rocha, Wayne Martins Nascimento, Ana Grasiela Limoeiro, Carlos Eduardo Fontana","doi":"10.1111/aej.12861","DOIUrl":"https://doi.org/10.1111/aej.12861","url":null,"abstract":"<p><p>To use scanning electron microscopy and energy dispersive X-ray spectroscopy to evaluate the metallurgical-chemical changes of WaveOne Gold (WOG) and R-Motion (RM), after multiple uses. The instruments were divided into groups (n = 8): WOG and RM-control groups, new instruments; WOG1 and RM1; WOG2 and RM2; WOG3 and RM3 after instrumentation of 1, 2 or 3 molars, respectively. Burrs occurred mainly in the control group and after the first use. The RM files were found to have a higher nickel content, which increased during reuse, and a decrease in oxygen content with increasing reuse, in addition to calcium impregnation, which occurred in greater amounts in the corrosion areas in the WOG files. The presence of topographic and chemical changes was demonstrated, indicating that caution should be taken when reusing endodontic instruments to avoid fractures.</p>","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141077289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Daiasharailang Lyngdoh, Sharique Alam, Huma Iftekhar, Surendra Kumar Mishra
This study evaluated the effectiveness of three different irrigant activation techniques in cleaning and establishing patency during retreatment of root canals obturated with gutta-percha and bioceramic sealer. 60 extracted premolars with oval-shaped canals were instrumented and obturated with gutta-percha and EndosequenceBC sealer using the 'warm hydraulic condensation' technique. The teeth were retreated using Protaper Universal Retreatment and XP-Endo Shaper system and divided into four groups according to the irrigant activation protocol used: control, passive ultrasonic irrigation (PUI), Endovac irrigation (EVI) and XP-Endo Finisher R (XPFR). Apical patency was achieved in all the samples of the XPFR group (100%), which showed a significantly higher success rate compared with the control (73.3%) and EVI groups (73.3%) (p < 0.05). The scanning electron microscopic evaluation revealed significantly cleaner middle and apical third root canals in the PUI and XPFR groups compared with the control group (p < 0.05). These findings suggest that XPFR effectively cleans and establishes patency in root canals filled with bioceramic sealers.
{"title":"Evaluation of canal patency and cleanliness following retreatment of bioceramic sealer-obturated root canals using three different irrigant activation protocols.","authors":"Daiasharailang Lyngdoh, Sharique Alam, Huma Iftekhar, Surendra Kumar Mishra","doi":"10.1111/aej.12855","DOIUrl":"https://doi.org/10.1111/aej.12855","url":null,"abstract":"<p><p>This study evaluated the effectiveness of three different irrigant activation techniques in cleaning and establishing patency during retreatment of root canals obturated with gutta-percha and bioceramic sealer. 60 extracted premolars with oval-shaped canals were instrumented and obturated with gutta-percha and EndosequenceBC sealer using the 'warm hydraulic condensation' technique. The teeth were retreated using Protaper Universal Retreatment and XP-Endo Shaper system and divided into four groups according to the irrigant activation protocol used: control, passive ultrasonic irrigation (PUI), Endovac irrigation (EVI) and XP-Endo Finisher R (XPFR). Apical patency was achieved in all the samples of the XPFR group (100%), which showed a significantly higher success rate compared with the control (73.3%) and EVI groups (73.3%) (p < 0.05). The scanning electron microscopic evaluation revealed significantly cleaner middle and apical third root canals in the PUI and XPFR groups compared with the control group (p < 0.05). These findings suggest that XPFR effectively cleans and establishes patency in root canals filled with bioceramic sealers.</p>","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140922713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Roberta Salles de Bastos, Thamires Vidal da Silva, Victor Talarico Leal Vieira, Emmanuel João Nogueira Leal Silva
This study assessed the mechanical properties of the Only One File Blue and the Reciproc Blue instruments. A total of 80 new 25 mm reciprocating NiTi instruments (25/.08v) were evaluated for their mechanical performance (n = 40 per group). Cyclic fatigue resistance, torsional fatigue, flexural resistance and buckling resistance tests were conducted. Statistical analysis was employed with a significance level set at 5%. The results indicated no statistically significant differences in resistance to cyclic fatigue neither in the fragment length between the instruments (p > 0.05). However, the Reciproc Blue instrument exhibited greater torque to fracture and a larger rotation angle than the Only One File Blue instrument (p < 0.05). The Only One File Blue instrument demonstrated higher flexibility but lower resistance to buckling compared to the Reciproc Blue instrument (p < 0.05). In conclusion, the tested instruments exhibit differences in mechanical properties, with the Reciproc Blue instrument generally presenting greater advantages than the Only One File Blue.
本研究评估了Only One File Blue和Reciproc Blue器械的机械性能。共对 80 件新的 25 毫米往复式镍钛器械(25/.08v)的机械性能进行了评估(每组 40 件)。进行了抗循环疲劳、抗扭转疲劳、抗弯曲和抗屈曲测试。统计分析的显著性水平设定为 5%。结果表明,两种仪器在抗循环疲劳性和碎片长度方面没有明显的统计学差异(P > 0.05)。然而,Reciproc 蓝色器械比 Only One File 蓝色器械表现出更大的断裂扭矩和更大的旋转角度(p<0.05)。
{"title":"Evaluation of mechanical properties of an original and a replica-like reciprocating instruments.","authors":"Roberta Salles de Bastos, Thamires Vidal da Silva, Victor Talarico Leal Vieira, Emmanuel João Nogueira Leal Silva","doi":"10.1111/aej.12854","DOIUrl":"https://doi.org/10.1111/aej.12854","url":null,"abstract":"<p><p>This study assessed the mechanical properties of the Only One File Blue and the Reciproc Blue instruments. A total of 80 new 25 mm reciprocating NiTi instruments (25/.08v) were evaluated for their mechanical performance (n = 40 per group). Cyclic fatigue resistance, torsional fatigue, flexural resistance and buckling resistance tests were conducted. Statistical analysis was employed with a significance level set at 5%. The results indicated no statistically significant differences in resistance to cyclic fatigue neither in the fragment length between the instruments (p > 0.05). However, the Reciproc Blue instrument exhibited greater torque to fracture and a larger rotation angle than the Only One File Blue instrument (p < 0.05). The Only One File Blue instrument demonstrated higher flexibility but lower resistance to buckling compared to the Reciproc Blue instrument (p < 0.05). In conclusion, the tested instruments exhibit differences in mechanical properties, with the Reciproc Blue instrument generally presenting greater advantages than the Only One File Blue.</p>","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140923414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Cleonice da Silveira Teixeira, Filipe Colombo Vitali, Eduardo Antunes Bortoluzzi, Lucas da Fonseca Roberti Garcia
This study evaluated the hardness of a composite resin used for root reinforcement, considering the light-curing time, root canal region and ageing due to long-term storage. Twenty incisor roots were reinforced using composite resin, varying the photopolymerisation time (40 or 120 s). Following fibre post cementation, the roots were transversely sectioned into coronal, middle and apical regions. Composite hardness was measured initially and after 18 months of water storage. Data underwent repeated measures analysis of variance and Tukey's post hoc tests. The factors 'light-curing time', 'root region' and 'ageing' affected the hardness. Significant interactions were observed between 'light-curing time × root region' and 'ageing × light-curing time'. Regardless of time, resin hardness in the apical region was lower. After ageing, hardness in the coronal and middle regions decreased when the light-curing time was 40 s, while no significant effect on hardness was noted with a light-curing time of 120 s.
{"title":"Longer light-curing time decreases the effect of ageing on composite resin hardness used in root reinforcement.","authors":"Cleonice da Silveira Teixeira, Filipe Colombo Vitali, Eduardo Antunes Bortoluzzi, Lucas da Fonseca Roberti Garcia","doi":"10.1111/aej.12856","DOIUrl":"https://doi.org/10.1111/aej.12856","url":null,"abstract":"<p><p>This study evaluated the hardness of a composite resin used for root reinforcement, considering the light-curing time, root canal region and ageing due to long-term storage. Twenty incisor roots were reinforced using composite resin, varying the photopolymerisation time (40 or 120 s). Following fibre post cementation, the roots were transversely sectioned into coronal, middle and apical regions. Composite hardness was measured initially and after 18 months of water storage. Data underwent repeated measures analysis of variance and Tukey's post hoc tests. The factors 'light-curing time', 'root region' and 'ageing' affected the hardness. Significant interactions were observed between 'light-curing time × root region' and 'ageing × light-curing time'. Regardless of time, resin hardness in the apical region was lower. After ageing, hardness in the coronal and middle regions decreased when the light-curing time was 40 s, while no significant effect on hardness was noted with a light-curing time of 120 s.</p>","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140923420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ana Flávia Almeida Barbosa DDS, MSc, PhD, Emmanuel João Nogueira Leal Silva DDS, MSc, PhD, Marco Aurélio Versiani DDS, MSc, PhD, Carolina Oliveira Lima DDS, MSc, PhD, Letícia de Almeida Pereira Reis Oliveira DDS, Graziela dos Santos Massa DDS, MSc, Thayná Cristine da Silva Eustáquio DDS, MSc, Ricardo Tadeu Lopes PhD, Luciana Moura Sassone DDS, MSc, PhD
This study assessed canal preparation effects on disinfection and dentin preservation. Thirty mandibular incisors were paired into two experimental groups (n = 10). Following contamination, the initial microbial sample was collected. Instruments 30/0.03 (Group 1) and 30/0.05 (Group 2) were employed and a second sample was obtained. Canals were enlarged using instruments 40/0.03 and 40/0.05, respectively, and a third sample was collected. Final irrigation was performed, and sample S4 obtained. A final scan evaluated volume, surface area, unprepared areas, removed dentin and dentin thickness. Data were analysed using Student t-test, Mann–Whitney, Kruskal–Wallis and Dunn tests. A significant difference was observed between S1 and other time points (p < 0.05). Comparison between groups showed no differences in bacterial loads and in the percentage of microbial reduction (p > 0.05). Group 2 exhibited greater reduction in dentin thickness than group 1 in the mesial aspect of the root (p < 0.05). Instrument 30/0.03 might provide effective disinfection and safety during mandibular incisors canal preparation.
{"title":"Effects of increasing instrument size and taper on the disinfection and shaping of mandibular incisors","authors":"Ana Flávia Almeida Barbosa DDS, MSc, PhD, Emmanuel João Nogueira Leal Silva DDS, MSc, PhD, Marco Aurélio Versiani DDS, MSc, PhD, Carolina Oliveira Lima DDS, MSc, PhD, Letícia de Almeida Pereira Reis Oliveira DDS, Graziela dos Santos Massa DDS, MSc, Thayná Cristine da Silva Eustáquio DDS, MSc, Ricardo Tadeu Lopes PhD, Luciana Moura Sassone DDS, MSc, PhD","doi":"10.1111/aej.12851","DOIUrl":"10.1111/aej.12851","url":null,"abstract":"<p>This study assessed canal preparation effects on disinfection and dentin preservation. Thirty mandibular incisors were paired into two experimental groups (<i>n</i> = 10). Following contamination, the initial microbial sample was collected. Instruments 30/0.03 (Group 1) and 30/0.05 (Group 2) were employed and a second sample was obtained. Canals were enlarged using instruments 40/0.03 and 40/0.05, respectively, and a third sample was collected. Final irrigation was performed, and sample S4 obtained. A final scan evaluated volume, surface area, unprepared areas, removed dentin and dentin thickness. Data were analysed using Student <i>t</i>-test, Mann–Whitney, Kruskal–Wallis and Dunn tests. A significant difference was observed between S1 and other time points (<i>p</i> < 0.05). Comparison between groups showed no differences in bacterial loads and in the percentage of microbial reduction (<i>p</i> > 0.05). Group 2 exhibited greater reduction in dentin thickness than group 1 in the mesial aspect of the root (<i>p</i> < 0.05). Instrument 30/0.03 might provide effective disinfection and safety during mandibular incisors canal preparation.</p>","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140877985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Maximiliano Casa‐Herzmann, Horacio Álvarez, Nicole Soto‐Valencia, Emmanuel J. N. L. Silva
Pre‐eruptive intracoronal resorption is a rare dental anomaly marked by a radiolucent area within an unerupted tooth. This report discusses the clinical management of pre‐eruptive intracoronal resorption in two mandibular premolars through vital pulp therapy using Biodentine as a sealant. Emphasising the significance of timely intervention for preserving pulp vitality and the tooth's integrity, the present case report underscores the necessity of vigilant clinical and radiographic monitoring for early detection and appropriate treatment. By presenting effective strategies for managing pre‐eruptive intracoronal resorption, the report contributes to the understanding of this condition and highlights the importance of proactive measures in preserving affected teeth and ensuring favourable long‐term outcomes.
{"title":"Pre‐eruptive intracoronal resorption: A report of two cases treated with Biodentine in mandibular premolars","authors":"Maximiliano Casa‐Herzmann, Horacio Álvarez, Nicole Soto‐Valencia, Emmanuel J. N. L. Silva","doi":"10.1111/aej.12853","DOIUrl":"https://doi.org/10.1111/aej.12853","url":null,"abstract":"Pre‐eruptive intracoronal resorption is a rare dental anomaly marked by a radiolucent area within an unerupted tooth. This report discusses the clinical management of pre‐eruptive intracoronal resorption in two mandibular premolars through vital pulp therapy using Biodentine as a sealant. Emphasising the significance of timely intervention for preserving pulp vitality and the tooth's integrity, the present case report underscores the necessity of vigilant clinical and radiographic monitoring for early detection and appropriate treatment. By presenting effective strategies for managing pre‐eruptive intracoronal resorption, the report contributes to the understanding of this condition and highlights the importance of proactive measures in preserving affected teeth and ensuring favourable long‐term outcomes.","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140839847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study assessed the ability of Twisted File Adaptive (TFA), TruNatomy (TRN) and VDW.Rotate (VR) instruments activated by continuous rotation (CR) and adaptive motion (AM) to shape curved root canals. Thirty mandibular molars with two separate mesial canals 20°–40° curved were collected and scanned using micro-computed tomography (μCT). The canals were then randomly assigned into six groups (n = 10): TRN, VR or TFA instruments activated by CR or AM. TRN groups 17.02, 20.04 and 26.04; VR groups 15.04, 20.05 and 25.06; TFA groups were shaped consecutively using 15K-file, 20.04 and 25.06. After they were shaped, the canals were scanned again. The volume of removed dentin, canal transportation and centring ratio were calculated μCT images. All data were analysed using the Kruskal–Wallis test or one-way analysis of variance (p < 0.05). With both kinematics, the TRN instrument removed the least amount of dentin, the VR-CR and the TFA-AM removed the most (p < 0.05). The transportation and centring ratios among all groups were similar (p > 0.05). The volume of dentin removed, the diameter or design features of the instruments and different kinematics did not affect the centring ratio and the amount of transportation and remained within safe limits. All three instruments activated by either kinematics were found to have similar effectiveness in shaping curved root canals.
{"title":"Micro-computed tomography analysis of shaping ability of nickel–titanium instruments activated by continuous rotation or adaptive motion","authors":"Sevde Nur Ürgüplüoğlu DDS, Levent Akıncı DDS, PhD, Neslihan Şimşek DDS, PhD","doi":"10.1111/aej.12850","DOIUrl":"10.1111/aej.12850","url":null,"abstract":"<p>This study assessed the ability of Twisted File Adaptive (TFA), TruNatomy (TRN) and VDW.Rotate (VR) instruments activated by continuous rotation (CR) and adaptive motion (AM) to shape curved root canals. Thirty mandibular molars with two separate mesial canals 20°–40° curved were collected and scanned using micro-computed tomography (μCT). The canals were then randomly assigned into six groups (<i>n</i> = 10): TRN, VR or TFA instruments activated by CR or AM. TRN groups 17.02, 20.04 and 26.04; VR groups 15.04, 20.05 and 25.06; TFA groups were shaped consecutively using 15K-file, 20.04 and 25.06. After they were shaped, the canals were scanned again. The volume of removed dentin, canal transportation and centring ratio were calculated μCT images. All data were analysed using the Kruskal–Wallis test or one-way analysis of variance (<i>p</i> < 0.05). With both kinematics, the TRN instrument removed the least amount of dentin, the VR-CR and the TFA-AM removed the most (<i>p</i> < 0.05). The transportation and centring ratios among all groups were similar (<i>p</i> > 0.05). The volume of dentin removed, the diameter or design features of the instruments and different kinematics did not affect the centring ratio and the amount of transportation and remained within safe limits. All three instruments activated by either kinematics were found to have similar effectiveness in shaping curved root canals.</p>","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140803087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jia Wang PhD, Chenguang Niu PhD, Pengfei Zhang MD, Shujun Ran PhD, Zhengwei Huang PhD
Dens invaginatus (DI) is a developmental anomaly of the teeth characterised by the in-folding of the enamel into the dentin. Oehlers' Type III DI is the most serious form, in which the inherently invaginated channels communicate with periodontal and dental pulp tissue, increasing the risk of bacterial contamination. However, varying and complex anatomical features make diagnosis and treatment challenging. Conventional endodontic therapies promote healing by avoiding unnecessary interventions (e.g., surgical or other invasive treatments). Radiographic examination can reveal the structural details of such malformations. We obtained multiple procedural details for treating Type III DI based on radiographic analyses from our clinical experience. In addition, we introduce a new classification strategy for the management of Type III DI that is more applicable to treatment needs. This study aimed to discuss the anatomical features and current treatment considerations of Type III DI.
内陷牙(Dens invaginatus,DI)是一种牙齿发育异常,其特征是牙釉质向牙本质内折叠。Oehlers'III型DI是最严重的形式,其中固有的内陷通道与牙周和牙髓组织相通,增加了细菌污染的风险。然而,不同和复杂的解剖特征使得诊断和治疗具有挑战性。传统的牙髓疗法通过避免不必要的干预(如手术或其他侵入性治疗)来促进愈合。射线检查可以揭示此类畸形的结构细节。根据我们的临床经验,我们通过放射影像学分析获得了治疗 III 型 DI 的多种程序细节。此外,我们还为 III 型 DI 的治疗引入了一种新的分类策略,该策略更适用于治疗需求。本研究旨在讨论 III 型 DI 的解剖学特征和当前治疗的注意事项。
{"title":"Endodontic management considerations for Type III dens invaginatus based on anatomical characteristics: A case series","authors":"Jia Wang PhD, Chenguang Niu PhD, Pengfei Zhang MD, Shujun Ran PhD, Zhengwei Huang PhD","doi":"10.1111/aej.12847","DOIUrl":"10.1111/aej.12847","url":null,"abstract":"<p>Dens invaginatus (DI) is a developmental anomaly of the teeth characterised by the in-folding of the enamel into the dentin. Oehlers' Type III DI is the most serious form, in which the inherently invaginated channels communicate with periodontal and dental pulp tissue, increasing the risk of bacterial contamination. However, varying and complex anatomical features make diagnosis and treatment challenging. Conventional endodontic therapies promote healing by avoiding unnecessary interventions (e.g., surgical or other invasive treatments). Radiographic examination can reveal the structural details of such malformations. We obtained multiple procedural details for treating Type III DI based on radiographic analyses from our clinical experience. In addition, we introduce a new classification strategy for the management of Type III DI that is more applicable to treatment needs. This study aimed to discuss the anatomical features and current treatment considerations of Type III DI.</p>","PeriodicalId":55581,"journal":{"name":"Australian Endodontic Journal","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140803088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}