A survey of 3,874 routine full-mouth radiographs

Dachi, Stephen F.; Howell, Francis V.

doi:10.1016/0030-4220(61)90003-2

Cited by 135 publications

(111 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…According to Andreasen et al, impaction of mandibular M3 varies from 18% to 32% in different populations 13. This rate was also estimated by Dachi and Howell as 17.5% and 21.9% for mandibular and maxillary M3s, respectively 14. In addition, in a recent study, Breik and Grubor showed a rate of 58.76% for mandibular M3 impaction in Melbourne, Australia 2…”

Section: Discussionmentioning

confidence: 69%

Position of impacted mandibular third molar in different skeletal facial types: First radiographic evaluation in a group of Iranian patients

et al. 2014

View full text Add to dashboard Cite

PurposeThis study was performed to evaluate the position of impacted mandibular third molars in different skeletal facial types among a group of Iranian patients.Materials and MethodsA total of 400 mandibular third molars in 200 subjects with different types of facial growth were radiographically investigated for their positions according to their types of facial growth on the basis of the β angle. The subjects were divided into three groups (class I, II, and III) according to ANB angle, representing the anteroposterior relationship of the maxilla to the mandible. Meanwhile, the subjects were also divided into three groups (long, normal, and short face) according to the angle between the stella-nasion and mandibular plane (SNGoGn angle). ANOVA was used for statistical analysis.ResultsThe mean β angle showed no significant difference among class I, II, and III malocclusions (df=2, F=0.669, p=0.513). The same results were also found in short, normal, and long faces (df=1.842, F=2, p=0.160). The mesioangular position was the most frequent one in almost all of the facial growth patterns. Distoangular and horizontal positions of impaction were not found in the subjects with class III and normal faces. In the long facial growth pattern, the frequency of vertical and distoangular positions were not different.ConclusionIn almost all of the skeletal facial types, the mesioangular impaction of the mandibular third molar was the most prevalent position, followed by the horizontal position. In addition, β angle showed no significant difference in different types of facial growth.

show abstract

Section: Discussionmentioning

confidence: 69%

Position of impacted mandibular third molar in different skeletal facial types: First radiographic evaluation in a group of Iranian patients

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Maxillary canine impaction occurs in the general population with a reported prevalence ranging from 0.27 to 2.4%, depending on the population [1–3]. This condition affects female patients 2 to 3 times more frequently than males [4].…”

Section: Introductionmentioning

confidence: 99%

Morphology of palatally displaced canines and adjacent teeth, a 3-D evaluation from cone-beam computed tomographic images

et al. 2018

View full text Add to dashboard Cite

BackgroundThe goal of this study was to investigate in patients with unilateral palatally displaced canine (PDC) the morphology of maxillary teeth from cone-beam computed tomography (CBCT) scans both on the PDC side and non-PDC side using a “surface matching” technique.MethodsCBCT images from 28 patients (mean age 16.04 ± 1.77 years) with unilateral PDC were selected. Each tooth in this study was segmented and then rendered into a 3D model using Mimics Research software and the root length was measured. Afterwards, 3D deviation analysis between the PDC and non-PDC side was carried out using Geomagic Control X software.ResultsStatistically significant differences (p ≤ 0.001) were obtained when comparing the root lengths and volumes of lateral incisors from the PDC side, non-PDC side and control group. In accordance with the findings of 3D deviation analysis, statistically significant differences between the patients and control group were obtained for the lateral incisors and canines (p ≤ 0.0001) and greater differences were found for the tooth crowns and root tips.ConclusionsLateral incisors adjacent to PDCs have shorter roots than contra-lateral lateral incisors. Furthermore, there were morphological differences between lateral incisors and canines in subjects with unilateral PDCs.

show abstract

“…Considering the numerous complications that can occur with their presence, the assessment of tooth position and progress of M3 eruption is necessary to optimize patient management [8–10]. …”

Section: Discussionmentioning

confidence: 99%

“…No such data are available for South America patients. Regardless of ethnic background, third molars have the highest rate of impaction of all teeth [8–10]. A lack of space in the arches is a common cause of impaction of the third molars [11–16].…”

Section: Introductionmentioning

confidence: 99%

Correlational study of impacted and non-functional lower third molar position with occurrence of pathologies

et al. 2016

View full text Add to dashboard Cite

BackgroundLower third molar (M3) eruption is unpredictable. The purpose of this study was to correlate radiographic position of M3 on a preexistent film with the current clinical, histopathological, and radiographic findings.MethodsA retrospective cohort study was performed. The sample was collected from a database of patients covered by Medical Fund of Brazilian Army. Radiographs were obtained a minimum of 5 years prior to the presurgical visit and after their clinical exam. The primary outcome variables were the teeth positions using Pell and Gregory/Winter classifications on panoramic X-rays. Those variables were analyzed at both the beginning (T0) and end of the study (T1). Clinical assessments and histopathological study of the thirds that were extracted were performed only at T1. Correlation between the teeth positions were related to the clinical, histopathological, and radiographic parameters using statistical analysis tests with significance set at p < 0.05.ResultsTwenty-six patients with 49 M3 were assessed over 10 months. Mean age was 14.92 years at T0 and 21.87 years at T1. The average time between T0 and T1 was 6.77 years. A significant relationship (p = 0.024) was found between the presences of root resorption on the second molar if M3 presented in an IB horizontal position at T1. There was also a significant correlation (p = 0.039) between dental crowding of the anterior lower teeth with IIIB position at T0 and if the patient finished orthodontic treatment without lingual retainers.ConclusionsLower M3 in position IIIB seen in a teenager and IB seen in an adult is more likely to have negative consequences and should be followed closely.

show abstract

A survey of 3,874 routine full-mouth radiographs

Cited by 135 publications

References 6 publications

Position of impacted mandibular third molar in different skeletal facial types: First radiographic evaluation in a group of Iranian patients

Position of impacted mandibular third molar in different skeletal facial types: First radiographic evaluation in a group of Iranian patients

Morphology of palatally displaced canines and adjacent teeth, a 3-D evaluation from cone-beam computed tomographic images

Correlational study of impacted and non-functional lower third molar position with occurrence of pathologies

Contact Info

Product

Resources

About