External root resorption in maxillary and mandibular second molars associated with impacted third molars: a cone-beam computed tomographic study

Li, Danna; Tao, Yiwei; Cui, Min; Wen, Zheng; Zhang, Xiaolei; Hu, Xiaoli

doi:10.1007/s00784-019-02859-3

Cited by 42 publications

(74 citation statements)

References 23 publications

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“…The more the M3M tilted mesially, the more the CEJ of the M3M moved distally; thus, the CEJ distance became larger. Some previous studies revealed a linear correlation between M3M mesial angulation and CEJ distance [8,18]. In the present study, we also found increased CEJ distance was associated with greater M3M mesial angulation.…”

Section: Discussionsupporting

confidence: 85%

“…The occlusal plane was drawn along the tips of the cusps of the M2M or the M3M [17]. In our study, when the angulations were respectively <− 15°, − 15°to 15°(between − 15°and 15°, including − 15°a nd 15°), 16°-75°, and > 75°, the M3M was defined as distally, vertically, mesially, and horizontally impacted [18]. The distance between the mesial cementoenamel junction (CEJ) of the M3M and the distal CEJ of the adjacent M2M, abbreviated as "CEJ distance" (Fig.…”

Section: Radiographic Assessmentmentioning

confidence: 99%

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Three-dimensional position of mandibular third molars and its association with distal caries in mandibular second molars: a cone beam computed tomographic study

Chen

Zheng

et al. 2020

Clin Oral Invest

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Objective To analyze the prevalence of distal caries in mandibular second molars (M2Ms) and its correlation with the threedimensional position of mandibular third molars (M3Ms) by cone beam computed tomography (CBCT) images. Materials and methods CBCT scans involving 421 M3Ms were assessed. The presence of distal caries of M2Ms, patient age and gender, impaction depths and mesial angulation of M3Ms, the cementoenamel junction (CEJ) distances and contact point localization, and the horizontal positions of M3Ms were assessed. Risk factors were identified by multivariate logistic regression analysis. Results The overall prevalence of distal caries in M2Ms was 31.6%. Mesial angulation (16°-75°) of M3Ms, contact point localization at or below the CEJ of M2Ms, and a buccal or lingual position of M3Ms relative to the molar line were identified as risk factors for the prevalence of distal caries in M2Ms (p < 0.05). Distal caries was more severe when the mesial angulation of M3Ms was 16°-75°(p < 0.05). Conclusions Buccal or lingual position of M3Ms may represent a new risk factor for the distal caries in M2Ms. Mesial angulation (16°-75°) of M3Ms is a predictive parameter for both the presence and severity of distal caries in M2Ms. Clinical relevance As the presence of distal caries in M2Ms is significantly associated with the three-dimensional position of M3Ms, watchful monitoring or prophylactic removal of M3Ms should be deliberated when M3Ms are mesially angulated (16°-75°), buccally or lingually positioned, and with the contact point localization at or below the CEJ of M2Ms.

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Section: Discussionsupporting

confidence: 85%

Section: Radiographic Assessmentmentioning

confidence: 99%

Three-dimensional position of mandibular third molars and its association with distal caries in mandibular second molars: a cone beam computed tomographic study

Chen

Zheng

et al. 2020

Clin Oral Invest

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“…The original proposal of Demirjian’s dental maturity were derived from the French–Canadian population, however up to this day, their applicability in various populations remains a point of debate 13 , 30 , 34 . In assessment of the dentition, especially for dental root morphology, CBCT images possess better sensitivity and specify compared to 2D radiographs 35 . Thus, the accuracy of Demirjian’s categorical staging should be improved by a CBCT based estimation.…”

Section: Discussionmentioning

confidence: 99%

Comparison of two established 2D staging techniques to their appliance in 3D cone beam computer-tomography for dental age estimation

Zirk

Zoeller

Lentzen

et al. 2021

Sci Rep

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For medicolegal purposes, orthodontic or orthognathic treatment various stomatological staging technique for age estimation with appliance of conventional radiographic images have been published. It remains uninvestigated if cone beam computer-tomography delivers comparable staging results to the conventional radiographic stages of third molar analysis. We conducted a retrospective cross-sectional study of 312 patients aged 13–21 years. Dental age estimation staging technique, introduced by Nolla and Demirjian, were applied on the left lower third molar imaged by conventional panoramic radiographs and cone beam computer-tomography. It was investigated if 2D and 3D imaging presented different staging results for dental age estimation. In 21% the Demirjian’s staging differed by a single stage between 2 and 3D images. The greatest congruence (87%) between 2 and 3D images was revealed for stage 7 (G). In contrary, stage 5 (E) presented the lowest level of congruence with 47.4%. The categorization of Nolla revealed divergences in staging for than two categorical variables in Nolla’s stages 3, 4, 5 and 6. In general, the analysis of the data displayed the divergence for Nolla’s stages 4–8. The staging results for 2D and 3D imaging in accordance to the rules of Nolla and Demirjian showed significant differences. Individuals of 18 years may present immature third molars, thus merely an immature third molar cannot reject legal majority. Nolla’s and Demirjian’s 2D and 3D imaging present significantly different staging results.

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“…The original proposal of Demirjian's dental maturity were derived from the French-Canadian population, however up to this day, their applicability in various populations remains a point of debate 14,31,35 . In assessment of the dentition, especially for dental root morphology, CBCT images possess better sensitivity and specify compared to 2D radiographs 36 . Thus, the accuracy of Demirjian's categorical staging should be improved by a CBCT based estimation.…”

Section: Discussionmentioning

confidence: 99%

 Dental Age Estimation - Comparison of Two Established 2D Staging Techniques to Their Appliance in 3D Cone Beam Computer-Tomography

Zirk

Zoeller

Lentzen

et al. 2020

Preprint

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For medicolegal purposes, orthodontic or orthognathic treatment various stomatological staging technique for age estimation with appliance of conventional radiographic images have been published. It remains uninvestigated if cone beam computer-tomography delivers comparable staging results to the conventional radiographic stages of third molar analysis.We conducted a retrospective cross-sectional study of 312 patients aged 13 to 21 years. Dental age estimation staging technique, introduced by Nolla and Demirjian, were applied on the left lower third molar imaged by conventional panoramic radiographs and cone beam computer-tomography. It was investigated if 2D and 3D imaging presented different staging results for dental age estimation.In 21% the Demirjian’s staging differed by a single stage between 2D and 3D images. The greatest congruence (87%) between 2D and 3D images was revealed for stage 7 (G). In contrary, stage 5 (E) presented the lowest level of congruence with 47.4%. The categorization of Nolla revealed divergences in staging for than 2 categorical variables in Nolla’s stages 3,4,5 and 6. In general, the analysis of the data displayed the divergence for Nolla’s stages 4 to 8. The staging results for 2D and 3D imaging in accordance to the rules of Nolla and Demirjian showed significant differences. Individuals of 18 years may present immature third molars, thus merely an immature third molar cannot reject legal majority.Nolla’s and Demirjian’s 2D and 3D imaging present significantly different staging results.

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External root resorption in maxillary and mandibular second molars associated with impacted third molars: a cone-beam computed tomographic study

Cited by 42 publications

References 23 publications

Three-dimensional position of mandibular third molars and its association with distal caries in mandibular second molars: a cone beam computed tomographic study

Three-dimensional position of mandibular third molars and its association with distal caries in mandibular second molars: a cone beam computed tomographic study

Comparison of two established 2D staging techniques to their appliance in 3D cone beam computer-tomography for dental age estimation

Dental Age Estimation - Comparison of Two Established 2D Staging Techniques to Their Appliance in 3D Cone Beam Computer-Tomography

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External root resorption in maxillary and mandibular second molars associated with impacted third molars: a cone-beam computed tomographic study

Cited by 42 publications

References 23 publications

Three-dimensional position of mandibular third molars and its association with distal caries in mandibular second molars: a cone beam computed tomographic study

Three-dimensional position of mandibular third molars and its association with distal caries in mandibular second molars: a cone beam computed tomographic study

Comparison of two established 2D staging techniques to their appliance in 3D cone beam computer-tomography for dental age estimation

&nbsp;Dental Age Estimation - Comparison of Two Established 2D Staging Techniques to Their Appliance in 3D Cone Beam Computer-Tomography

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Dental Age Estimation - Comparison of Two Established 2D Staging Techniques to Their Appliance in 3D Cone Beam Computer-Tomography