Comparative study of cephalometric measurements using 3 imaging modalities

Wen, Juan; Liu, Shu; Xiao, Ye; Xie, Xiaoyan; Li, Jialing; Li, Huang; Li, Mei

doi:10.1016/j.adaj.2017.07.030

Cited by 32 publications

(26 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The differences were smaller for the second set of measurements. When comparing the imaging techniques with each other for both the first and second set of measurements, SNA presented statistically significant differences; this could be justified by the difficulty of locating Point A in accordance with Yu et al 13 The UI NA angle presented statistically significant differences in the first set of measurements between the two types of image, a result in agreement with Wen et al, 14 in conventional lateral radiography it is often difficult to locate the apex of a tooth because the contrast between the apex image and the surrounding tissues is usually poor. 15 In addition, it is difficult to distinguish between central and lateral incisors especially in cases of crowding or when the lateral incisor is more prominent than the central incisors.…”

Section: Discussionsupporting

confidence: 79%

A comparative study of digital lateral radiography and virtual cone-beam computed assisted cephalogram in cephalometric measurements

et al. 2018

View full text Add to dashboard Cite

show abstract

Section: Discussionsupporting

confidence: 79%

A comparative study of digital lateral radiography and virtual cone-beam computed assisted cephalogram in cephalometric measurements

et al. 2018

View full text Add to dashboard Cite

show abstract

“…This is similar with the current study findings. In addition to the advantages of CBCT for assessing ARR, it is also important to note that the radiation of CBCT can be 1.5 to 33 times higher than that of the traditional panoramic radiography [25], therefore future studies can consider to use the localized and limited field of view CBCT that provides the information needed to minimize patient's exposure to radiation and expense for radiography [26].…”

Section: Discussionmentioning

confidence: 99%

Prevalence and severity of apical root resorption during orthodontic treatment with clear aligners and fixed appliances: a cone beam computed tomography study

Deng

et al. 2020

Prog Orthod.

Self Cite

View full text Add to dashboard Cite

Background: Fixed appliances have been the mainstream for orthodontic treatment, while clear aligners, such as Invisalign system, have become increasingly popular. The prevalence of apical root resorption (ARR) in patients with clear aligners is still controversial. The aim of this study was to investigate and compare the prevalence and severity of ARR in patients treated with clear aligners and fixed appliances using cone beam computed tomography (CBCT). Materials and methods: A total of 373 roots from 70 subjects, with similar baseline characteristics and the ABO discrepancy index scores (i.e., treatment difficulty), were included into two groups: the clear aligners group (Invisalign, Align Technology, California, USA) and fixed appliances group (Victory Series; 3 M Unitek, California, USA). Root length of each anterior tooth was measured on the CBCT images by two blinded investigators. The ARR on each tooth was calculated as the difference of root length before and after orthodontic treatment. Chi-square test and paired t test was used to compare the ARR between the two groups as well as before and after orthodontic treatments. Results: Prevalence of ARR in the clear aligners group (56.30%) was significantly lower than that in the fixed appliances group (82.11%) (P < 0.001). The severity of ARR in the clear aligners group (0.13 ± 0.47 mm) was significantly less than that in the fixed appliances group (1.12 ± 1.34 mm) (P < 0.001). The most severe ARR was found on the maxillary canine (1.53 ± 1.92 mm) and lateral incisor (1.31 ± 1.33 mm) in the fixed appliances group; the least ARR was found on the mandibular canine (− 0.06 ± 0.47 mm) and lateral incisor (0.04 ± 0.48 mm) in the clear aligners group (P < 0.001). Conclusions: The prevalence and severity of ARR measured on CBCT in patients with clear aligners were less than those in patients with fixed appliances.

show abstract

“…Although the 3-dimensional cone-beam computed tomography (CBCT) has advantages for researching the hard and soft tissues changes following orthodontic treatment, the conventional 2-dimensional cephalogram is still of great clinical importance and commonly used in orthodontic diagnosis and treatment planning, due to the limitations of CBCT, such as high cost and radiation exposure [11]. An accurate prediction of soft tissue changes following incisor retraction using cephalograms has been considered to be clinically convenient and relevant for orthodontic treatment planning and doctorpatient communication [12].…”

Section: Introductionmentioning

confidence: 99%

Orthodontic incisor retraction caused changes in the soft tissue chin area: a retrospective study

Zhang

et al. 2020

BMC Oral Health

Self Cite

View full text Add to dashboard Cite

Background: To investigate the area and morphological changes around the soft tissue chin after orthodontic incisor retraction. Methods: Fifty-nine female adults with bimaxillary protrusion requiring extraction of four premolars were included in the study. Cephalograms were taken before (T0) and after (T1) orthodontic treatment. The soft tissue changes, including the area, thickness and morphology were measured. Paired-t tests were performed for statistical comparisons. Pearson correlation analyses and backward multivariate regression analyses were used to identify the relationship between the soft tissue changes and incisor retraction. Results: Following the incisor retractions (5.35 ± 1.79 mm and 4.42 ± 1.62 mm for the upper and lower, respectively), there was a significant increase in the soft tissue thickness of L1c-LL (0.64 ± 1.67 mm, P = 0.025) and Pog-Pog' (0.44 ± 1.10 mm, P = 0.022), and a significant decrease in the soft tissue thickness of B-B′ (1.21 ± 1.34 mm, P < 0.01). Changes in the area of soft tissue chin and lower lip were not statistically significant (P > 0.05). Pearson coefficient between the thickness changes of B-B′ and the retraction of lower incisors was − 0.376. The multiple correlations between the soft tissue thickness changes and incisor retractions were Y = 1.02-0.42a + 0.42b for L1c-LL, and Y = 0.17-0.31b for B-B′. Conclusions:The orthodontic incisor retraction could cause soft tissue thickness changes (i.e. an increase in L1c-LL and Pog-Pog' and a decrease in B-B′) without area changes.

show abstract

Comparative study of cephalometric measurements using 3 imaging modalities

Cited by 32 publications

References 39 publications

A comparative study of digital lateral radiography and virtual cone-beam computed assisted cephalogram in cephalometric measurements

A comparative study of digital lateral radiography and virtual cone-beam computed assisted cephalogram in cephalometric measurements

Prevalence and severity of apical root resorption during orthodontic treatment with clear aligners and fixed appliances: a cone beam computed tomography study

Orthodontic incisor retraction caused changes in the soft tissue chin area: a retrospective study

Contact Info

Product

Resources

About