Comparing the pulp/tooth area ratio and dentin thickness of mandibular first molars in different age groups: A cone-beam computed tomography study

Chaleefong, Mathukan; Prapayasatok, Sangsom; Nalampang, Sakarat; Louwakul, Phumisak

doi:10.4103/jcd.jcd_47_21

Cited by 4 publications

(4 citation statements)

References 21 publications

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“…The narrowing of the pulp chamber of mandibular molars due to ageing is more in the mesial direction than in the distal direction. There is a signi cant difference between age groups in the increase in dentin thickness of the mesial roots but no difference in the distal root [10]. Similarly, dentin thickness in the MB and ML canals increases signi cantly with age [30].…”

Section: Discussionmentioning

confidence: 89%

“…However, the incidence of a missing DL canal in the distal root decreased with age. The fact that dentin thickness increases with age could help explain this nding [10]. The over-40 age group has narrower root canals than others [29].…”

Section: Discussionmentioning

confidence: 99%

“…Calci cation, which reduces the pulpal space dimension and narrows the root canals, is the most common of all age-related changes in teeth [10]. Endodontic treatments are more challenging for elders because of their medical risks, psychological limitations, and physical disabilities [11].…”

Section: Introductionmentioning

confidence: 99%

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Missing Canals in Endodontically Treated Molar Teeth Among Different Age Groups in a Turkish Population

Çulha

TUNÇ

2023

Preprint

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Objectives Root canal localization is necessary for proper canal disinfection and obturation. Missed canals may act as a microorganism repository. As the world's population ages, the endodontic needs of the elders present increasing challenges for dental care providers. This study aimed to examine the missing canals in terms of ageing in endodontically treated 1st and 2nd molars in a Turkish population.Materials and Methods The study included maxillary and mandibular molar teeth of 619 subjects (317 female and 302 male). Cone-beam computed tomography images of 490 molar teeth representing at least one missing canal were divided into 3 groups according to the age of the subjects: 18–44, 45–64, and more than 65. The localization of the missed canals was recorded. The data were evaluated with the chi-square test, with the significance level set at a p-value of 0.05.Results The incidence of missing 2nd mesiobuccal canals in the 18–44 age group and 1st mesiobuccal canals in the over-45 age group was statistically higher (p < 0.05). The incidence of missing 2nd mesiobuccal canals in maxillary 1st molars was statistically higher than in maxillary 2nd molars (p < 0.05). There was no statistical difference between the types of missing canals and age groups in mandibular molars (p > 0.05).Conclusion Missing canals were more frequent in the mesial roots of mandibular molars with ageing. With age, the incidence of missing canals increased in maxillary first molars but decreased in maxillary second molars.Clinical Relevance: Ageing can make it difficult to clinically locate the canals in the mesiobuccal root of maxillary molars and mesial roots of mandibular molars.

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

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Missing Canals in Endodontically Treated Molar Teeth Among Different Age Groups in a Turkish Population

Çulha

TUNÇ

2023

Preprint

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“…CBCT can be used as an appropriate tool for clinical diagnosis, treatment planning, and follow-up of endodontic cases [ 15 , 16 ]. Additionally, our search revealed limited data on CBCT-based assessments of the minimum dentin thickness in mandibular molars [ 17 , 18 ]. Although micro-CT provides images with higher resolution than CBCT, it is not possible to use it for in vivo examinations of large samples or with a high and representative sample size, in contrast to CBCT which allows us to obtain the data from the larger sample size [ 19 , 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Anatomical Dentin Thickness in Mandibular First Molar: An In Vivo Cone-Beam Computed Tomographic Study

Choudhari,

Venkata Teja,

Ramesh

et al. 2024

International Journal of Dentistry

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Aim. To determine the minimum dentin thickness in the mesial and distal walls of the mesiobuccal (MB) and mesiolingual (ML) canals of the mandibular first molars using cone-beam computed tomography (CBCT). Materials and Methods. CBCT examinations of 624 mandibular first molars from an Indian subpopulation were analyzed. The mesial and distal minimum dentin thickness was evaluated in 1 mm intervals apical to the furcation area. Independent t-test was used to analyze the data (α = 0.05). Using Cohen’s kappa coefficient, the interexaminer and intraexaminer reliability was evaluated. Results. The mesial dentin thickness was significantly higher than the distal dentin thickness for MB and ML canals (P=0.01). The average dentin thickness in the distal and mesial plane of the MB canal was 1.15 ± 0.15 mm and 1.52 ± 0.19 mm at the 1 mm level and 0.83 ± 0.13 and 1.08 ± 0.18 at the 5 mm level, respectively. For the ML canal, the average dentin thickness in the distal plane and the mesial plane was 1.24 ± 0.18 mm and 1.44 ± 0.21 at the 1 mm level and 0.91 ± 0.16 and 1.01 ± 0.17 at the 5 mm level, respectively. Statistical analysis between the MB and ML canals showed significant differences in the dentin thickness at 4 and 5 mm levels in both the distal and the mesial planes (P=0.01). In more than 85% of the cases, the minimum dentin thickness was seen at the 5 mm level in both the distal and mesial planes in MB and ML canals. Conclusion. The distal planes of the mesiolingual and mesiobuccal canals were thinner in most cases, making the distal surface more prone to iatrogenic perforations. Considerably, at 4 and 5 mm from the furcation, the distal wall was significantly thinner than the mesial walls. Understanding the anatomy of the danger zone in the mesial roots of the mandibular first molars may serve to minimize the risk of endodontic mishaps such as strip perforations.

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Strip Perforation of the Danger Zone in Mandibular Molars: A Case Report and Literature Review

Chen,

Shi,

Xia

et al. 2023

Preprint

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Background The danger zone (DZ) commonly refers to the area of mesial roots in mandibular molars, which is more vulnerable to perforations in cases of over-instrumentation. Midroot perforations may lead to a dubious prognosis and ultimately to tooth extraction. In clinical practice, identifying the danger zone and preventing perforation are extremely crucial. However, there are no articles that systematically summarize relevant studies since the concept was first introduced in the 1980s. Case presentation This report describes a failed root canal treatment because of a stripe perforation during preparation. In our hospital, a female patient underwent root canal treatment on her mandibular first molar. After the standard procedure of root canal preparation, the pathological condition of the tooth worsens. A CBCT showed a transmissive shadow at the root bifurcation and partial loss of dentin in the proximal mesio-buccal root. This tooth was eventually recommended for extraction. Conclusions Each clinical case must be analyzed carefully and individually before endodontic procedures to minimize the occurrence of iatrogenic perforations. In addition, this report provides a comprehensive review of research advances related to the danger zone (DZ) and summarizes the characteristics of the DZ. The risk factors associated with streak perforation events, such as instrument selection and anatomical factors, are also explored in detail. Through a comprehensive analysis of these research advances and risk factors, we can better understand characteristics and potential risks of the DZ to guide endodontic treatment decisions in clinical practice to improve the success rate and prognostic quality of treatment.

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Comparing the pulp/tooth area ratio and dentin thickness of mandibular first molars in different age groups: A cone-beam computed tomography study

Cited by 4 publications

References 21 publications

Missing Canals in Endodontically Treated Molar Teeth Among Different Age Groups in a Turkish Population

Missing Canals in Endodontically Treated Molar Teeth Among Different Age Groups in a Turkish Population

Assessment of Anatomical Dentin Thickness in Mandibular First Molar: An In Vivo Cone-Beam Computed Tomographic Study

Strip Perforation of the Danger Zone in Mandibular Molars: A Case Report and Literature Review

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