Dens invaginatus in Japanese incisors

Miyoshi, S; Fujiwara, J.; Nakata, Toshiyuki; Yamamoto, Kimihisa; Deguchi, K.

doi:10.2330/joralbiosci1965.13.539

Cited by 9 publications

(7 citation statements)

References 4 publications

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“…The highest reported prevalence rates are 49.62% of study subjects and 38.50% of examined teeth as described by Hallet et al (1953) and Miyoshi et al (1971). In contrast, our study found a prevalence of 31.34% in investigated individuals and 4.83% for all teeth examined; however, when considering only individuals who had maxillary lateral incisors, our prevalence of DI is 59.52% of maxillary lateral incisors and 60.00% of individuals.…”

Section: Dens Invaginatus In Ancient Chinese Teethcontrasting

confidence: 54%

Dens Invaginatus in Ancient Chinese Teeth of 2,000 Years Ago

Shi

Duan

Shao

et al. 2013

The Anatomical Record

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Dens invaginatus (DI) is a developmental anomaly of teeth. Here we observed the characteristics of DI in 517 permanent teeth from 67 ancient Chinese people using micro-computed tomography (micro-CT) scanning techniques. The individuals were excavated from Shaanxi province of China and identified to be about 2,000 years old. Four DI categories are proposed to distinguish the different types of DI. The invaginated lingual fossa is classified into three classes. The overall prevalence of DI in 67 individuals was 31.34% (21 of 67). DI was found in 25 of 517 teeth (4.83%). All affected teeth were maxillary lateral incisors. The invaginated lingual fossa (Type I DI) occurred most frequently (84%), followed by radicular grooves (Type II; 16%), while Type III and Type IV were not found in the present study. Some of fossae correspond with radicular grooves (8 of 21; 3 located at mesial, 5 were distal). The bilateral incidence of DI was 19.05%. Comparing our results to those of a retrospective survey of DI from 1873 to present, we found a higher rate of DI in the excavated teeth of Chinese individuals 2,000 years ago. The use of the micro-CT technique and ethnic origin might have contributed to the higher incidence of DI.

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Section: Dens Invaginatus In Ancient Chinese Teethcontrasting

confidence: 54%

Dens Invaginatus in Ancient Chinese Teeth of 2,000 Years Ago

Shi

Duan

Shao

et al. 2013

The Anatomical Record

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“…It appears that studies in which methods other than simple periapical radiographs were used for diagnosis, report the most reliable information. When taking radiographs of extracted lateral incisors, Myoshi et al 28 could also take a mesio-distal projection, thereby identifying dens invaginatus in 39% of the maxillary lateral incisors in same Japanese population which was evaluated by Fujiki et al 27 . and Gotoh et al 11 , who reported a much lower prevalence (4% and 10%, respectively) for dens invaginatus, which was determined using periapical radiographs alone 11,27,28 .…”

Section: Discussionmentioning

confidence: 99%

“…When taking radiographs of extracted lateral incisors, Myoshi et al 28 could also take a mesio-distal projection, thereby identifying dens invaginatus in 39% of the maxillary lateral incisors in same Japanese population which was evaluated by Fujiki et al 27 . and Gotoh et al 11 , who reported a much lower prevalence (4% and 10%, respectively) for dens invaginatus, which was determined using periapical radiographs alone 11,27,28 . Shi et al studied ancient man samples and used micro-CT, which likely provided more reliable 3D information of the lateral incisor structure; they reported an incidence of 59% 29 .…”

Section: Discussionmentioning

confidence: 99%

“…Among the studies focused on the maxillary incisors (Table 2 ), one can also find a range of prevalence from as low as 0.3–5% 24 – 27 to as high as 32% or even 75% 2 , 3 , 28 , 29 . Some of these differences may be attributed to ethnic background, but comparison of the results of Miyoshi et al 28 (38%) with those of Fujiki et al 27 . (4%) and Gotoh et al 11 (10%) indicate otherwise.…”

Section: Discussionmentioning

confidence: 99%

“…incisors 40% of patient Grahnen et al 26 1959 3020 T Sweden PA-R Right Maxill. incisors 3% of patients Miyoshi et al 28 1971 1223 T Japan Extracted teeth—Radiographs *** Maxill. lateral incisors 39% of teeth Fujiki et al 27 1974 2126 T Japan PA-R Maxill.…”

Section: Discussionmentioning

confidence: 99%

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Prevalence of dens invaginatus in young Israeli population and its association with clinical morphological features of maxillary incisors

Kfir

Salem

Natour

et al. 2020

Sci Rep

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Dens invaginatus is an anomaly mostly observed in maxillary incisors. This study aimed to assess the prevalence of dens invaginatus in maxillary incisors in young Israeli population and to study its potential association with clinical coronal morphological features. Data was collected from periapical radiographs and clinical photographs of patients from Orthodontics Department between 2006 and 2018. Radiographic characteristics were evaluated and compared to clinical coronal morphological features. Statistical analysis was performed using the Pearson chi-square test with statistical significance set at p < 0.05. The sample included 1621 maxillary incisors from 547 patients. Dens invaginatus was observed in 422 (26%) of these teeth. Maxillary lateral incisors were more affected than central incisors. In 103 patients dens invaginatus was unilateral, while in all other cases it was bilateral. Unique clinical morphological characteristics were observed in 88% of the teeth that exhibited radiographic evidence of dens invaginatus. Dens invaginatus Type I was most frequently observed, accounting for 90% of the teeth. A significant association between clinical coronal morphological features and dens invaginatus was detected. Dens invaginatus is common in maxillary incisors of the study population. Several clinical morphological features may predict the presence of dens invaginatus.

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