Determination of Criteria for the Age Estimation (Chronological) According to Structural Changes of Teeth and Alveolar Bone Height in Images of Cone Beam Computed Tomography in Adults

ABSTRACT Objectives: To evaluate alveolar bone support around cleft-adjacent maxillary central incisors (U1) in patients with unilateral cleft lip, alveolus and palate (UCLAP) in the late mixed dentition and to investigate the correlation between the alveolar bone thickness (ABT) and tooth inclination. Materials and Methods: Cone beam computed tomography scans of 45 subjects with UCLAP (29 boys, 16 girls; mean age = 10.74 ± 1.08 years) were assessed. The distance between the cementoenamel junction (CEJ) and alveolar bone crest (AC), and the ABTs at 3 mm, 6 mm, and the apex were measured on the labial, lingual and distal surfaces of U1. The cleft and normal sides were compared using a paired t-test and Pearson's χ2 test. Pearson's correlation was used to explore the association between the ABT and tooth inclination of cleft-adjacent U1 in the labiolingual and mesiodistal dimensions. Results: The CEJ-AC distances were significantly greater in cleft-adjacent U1 (P < .01), with more bone height reduction observed labially and distally (P < .001). The labial, lingual, and apico-distal ABTs were decreased on the cleft side (P < .01). A positive correlation was found between the apico-labial ABT and the labiolingual inclination (r = 0.568, P < .01). Conclusions: Patients with UCLAP have reduced alveolar bone support around the cleft-adjacent U1, and the apico-labial ABT tends to decrease with increasing lingual tooth inclination; however, the correlation was weak.

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Age Estimationof Pawon Manwith Teeth Identification Using Johanson Method Through Cbct 3d Radiograph

AMERTA ◽

10.24832/amt.v36i1.188 ◽

2018 ◽

Vol 36 (1) ◽

pp. 1

Author(s):

Lutfi - Yondri

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Age Estimation ◽

Alveolar Bone ◽

Forensic Odontology ◽

Visual Observation ◽

Cone Beam ◽

Purposive Sampling ◽

Non Invasive ◽

Primary Identification

Abstrac. Pawon man is prehistoric human who lived in Pawon cave. The skeletons founded in the cave consist of rest of brittle bones and teeth which still attached to alveolar bone even though it had immersed inside the soils on thousands years ago. Then, the teeth are used as primary identification in forensic odontology research. This research aimed is to compare age estimation of Pawon man with Johanson method. Previously, the age estimation was made only based on visual observation of posterior molars attrition by Brothwell method. This research is a descriptive studied using purposive sampling. The samples are 21 teeth that intact and attach to the alveolar bone without any fracture line. The measurement of age estimation with Johanson method using Ez-Implant software, it’s non-invasive age measurement by Cone Beam Computed Tomography 3D radiograph. The results showed that the age of first Pawon man is 32-33.92 years old, third Pawon man is 32.935-36.275 years old, fourth Pawon man is 34.42 years old, and fifth Pawon man is 27.36-31.35 years old. Nonetheless, the second Pawon man is not included in sampling criteria. The measurement using Johanson method through CBCT. Abstrak. Manusia Pawon adalah manusia prasejarah yang pernah hidup di Gua pawon pada masa lalu. Kerangka didirikan terdiri dari sisa tulang rapuh dan gigi yang masih menempel pada tulang alveolar meskipun telah terdeposisi di dalam tanah dari ribuan tahun yang lalu. Gigi merupakan digunakan sebagai identifikasi utama dalam penelitian odontologi forensik. Penelitian ini bertujuan untuk membandingkan estimasi usia manusia Pawon menggunakan metode Johanson. Sebelumnya, estimasi usia baru dibuat hanya berdasarkan pengamatan visual dari atrisi molar posterior menggunakan metode Brothwell. Penelitian ini merupakan penelitian deskriptif menggunakan purposive sampling. Sampel adalah 21 gigi yang utuh dan menempel pada tulang alveolar tanpa garis fraktur. Pengukuran estimasi umur bersifat non-invasif menggunakan hasil radiografi Cone Beam Computed Tomography 3D dan dianalisis melalui metode Johanson menggunakan software Ez-Implan. pengukuran Hasil penelitian menunjukkan bahwa usia manusia Pawon pertama adalah 32-33,92 tahun, Manusia Pawon ketiga adalah berusia 32,935-36,275 tahun, Manusia Pawon keempat berusia 34,42 tahun, dan Manusia Pawon kelima berusia 27,36-31,35 tahun. Manusia Pawon kedua tidak diukur karena tidak termasuk dalam kriteria sampling. Dapat dismpulkan bahwa pengukuran menggunakan metode Johanson melalui CBCT 3D lebih spesifik dan detail dalam menghasilkan estimasi umur dibandingkan dengan metode Brothwell.

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The usefulness of cone-beam computed tomography gray values for alveolar bone linear measurements

The Angle Orthodontist ◽

10.2319/060617-379.1 ◽

2018 ◽

Vol 88 (2) ◽

pp. 227-232 ◽

Cited By ~ 2

Author(s):

Soumya Padala ◽

Boon Ching Tee ◽

Frank M. Beck ◽

Kathy Elias ◽

Do-Gyoon Kim ◽

...

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Interrater Reliability ◽

Alveolar Bone ◽

Cone Beam ◽

Large Field ◽

Voxel Size ◽

Physical Measurements ◽

Bone Height ◽

Gray Values

ABSTRACT Objectives: To test a proof-of-concept that the accuracy and reliability of alveolar bone height measurements from orthodontic grade (large field-of-view [FOV], large voxel-size) cone-beam computed tomography (CBCT) images may be improved by using pixel gray values. Materials and Methods: Twenty fresh cadaver pig heads underwent CBCT scans (17 × 23 cm FOV, 0.4-mm voxel size). Buccal alveolar bone heights of maxillary first molars were measured using the conventional vision-based (VB) and the proposed gray value–assisted (GVA) methods. The GVA methods entailed localization of landmarks through observation of gray value pattern changes across tissue boundaries followed by mathematical calculation of distances between landmark pixels. Interrater reliability and accuracy of CBCT measurements made by all methods were statistically analyzed by comparing with physical measurements (gold standards). Results: The interrater reliability of CBCT measurements made by GVA methods was comparable to physical measurements but higher than those made by the VB method. The GVA (bend-down pattern) method yielded average measurements similar to physical measurements, while those obtained by the VB and the GVA (straight pattern) methods were significantly larger (repeated measures analysis of variance, P < .001). The GVA (bend-down pattern) method also produced significantly more measurements within one voxel size of physical measurements than did the VB and GVA (straight pattern) methods (Chi-square tests, P < .017). Conclusions: These data confirm a concept that local gray value change patterns may be used to improve the accuracy and reliability of alveolar bone height measurement from large FOV and large voxel-size CBCT images.

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Does Alt-RAMEC protocol and facemask treatment affect dentoalveolar structures?

The Angle Orthodontist ◽

10.2319/111620-940.1 ◽

2021 ◽

Author(s):

Elvan Önem Özbilen ◽

Hanife Nuray Yılmaz ◽

Yasemin Bahar Acar

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Alveolar Bone ◽

Cone Beam ◽

Distributed Data ◽

Bone Thickness ◽

Total Reduction ◽

Computed Tomography Images ◽

Significant Change ◽

Bone Height

ABSTRACT Objectives To evaluate dentoalveolar changes immediately after the alternate rapid maxillary expansion and constriction (Alt-RAMEC) protocol and facemask (FM) treatment using cone-beam computed tomography images. Materials and Methods Cone-beam computed tomography images of 20 patients (mean age = 9.64 ± 1.3 years) who received the Alt-RAMEC protocol before FM treatment were retrieved in this retrospective study. Dental and alveolar inclinations, buccal and palatal alveolar bone thickness, and buccal and palatal alveolar bone height changes were measured before treatment (T0), after the Alt-RAMEC protocol (T1), and after FM treatment (T2). Measurements for right and left molars were performed separately. The Shapiro-Wilks test was used to assess the conformity of the parameters to the normal distribution. The paired t-test and repeated measures analysis of variance were used for normally distributed data. The Wilcoxon signed-rank test and Friedman test were used for non-normally distributed data. The Bonferroni correction was used to reduce the chances of obtaining false-positive results. Statistical significance was set at P < .05. Results Buccal alveolar bone thickness and alveolar bone inclinations decreased significantly from T1 to T0 and showed no significant change from T2 to T1. The total reduction T2-T0 was statistically significant. The change in palatal alveolar bone thickness was not significant T1-T0 but increased significantly for T2-T1 and T2-T0. Buccal alveolar bone height, palatal alveolar bone height, and molar inclinations increased significantly T1-T0, but there was no significant change T2-T1. The total reduction at T2-T0 was statistically significant. Conclusions The results of this study revealed that the effects of the Alt-RAMEC protocol on dentoalveolar tissues were similar to the changes reported in the literature after rapid palatal expansion.

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Vestibular Alveolar bone height measurement: Accuracy and Correlation between direct and indirect techniques.

Acta Odontológica Latinoamericana ◽

10.54589/aol.33/1/022 ◽

2020 ◽

Vol 33 (1) ◽

pp. 22-26

Author(s):

Guillermo Pérez-Sánchez ◽

Maykel González-Torres ◽

Mario Guzmán-Espinosa ◽

Víctor Hernández-Vidal ◽

Bernardo Teutle-Coyotecatl ◽

...

Keyword(s):

Computed Tomography ◽

Correlation Coefficient ◽

Cone Beam Computed Tomography ◽

Alveolar Bone ◽

Pearson Correlation ◽

Intraclass Correlation ◽

Cone Beam ◽

Height Measurement ◽

Direct Measurements ◽

Bone Height

Cone Beam Computed Tomography (CBCT) has modified the perspective of dentistry images, providing manipulable threedimensional images with a 1:1 patient:image ratio. Treatments and diagnosis are modified or corroborated by CBCT; however, its accuracy in thin structures such as cortical bone has been subjected to critical review. The aim of this study is to correlate the measurement of vestibular alveolar bone height using direct measurements and measurements performed with cone-beam tomographic images with standard (SD) voxel resolution. Thirty incisor and premolar teeth of patients undergoing open curettage were measured with a high-precision caliper and with Cone Beam Computed Tomography (CBCT) at an SD resolution of 0.16 mm voxels in a 3D Orthophos XG Sirona scanner. Intra-observer evaluation was performed using the intraclass correlation coefficient (ICC). Direct measurements and CBCT measurements were correlated using Pearson correlation (PCC). The mean difference between indirect and direct measurements was 3.15 mm. Paired t test and Pearson Correlation coefficient determined that all measurements differed statistically from each other with p<0.05. With the CT scanner and protocol used in this study, CBCT images do not enable accurate evaluation of vestibular alveolar bone height

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