Alveolar Bone Loss around Incisors in Surgical Skeletal Class III Patients

Kim, Yoonji; Park, Je Uk; Kook, Yoon‐Ah

doi:10.2319/070308-341.1

Cited by 99 publications

(105 citation statements)

References 25 publications

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“…It is evident that the significantly reduced vertical height and horizontal thickness explains the risks of periodontal problems. 15 In our study, the lingual alveolar bone losses showed no difference between the early-treated and later-treated groups. As to the labial side, the AC was higher at 3.30 mm 6 1.18 mm (Table 4) in the later-treated group.…”

Section: Discussionmentioning

confidence: 62%

“…Reference points, lines, and measurement variables are described in Figure 5 and Tables 1 and 2. The measurement methods were revised from Kim et al 15 and followed the same methods as reported in our previous study 3 when measuring a nonuniform root shape. Sagittal slices were evaluated where the maxillary central incisor showed the widest labiolingually in the axial view.…”

Section: Methodsmentioning

confidence: 99%

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The treatment timing of labial inversely impacted maxillary central incisors: A prospective study

Sun

Ren

et al. 2016

The Angle Orthodontist

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Objective: To determine the timing of treatment for the labial inversely impacted maxillary central incisors. Methods: Twenty-eight patients (mean age, 8.2 years) with labial inversely impacted maxillary central incisors were divided into early-treated and later-treated groups according to their dental age. All of the patients were treated with a combination of surgery and orthodontic traction using the Guide rod appliance. Cone-beam computed tomography images were taken immediately after treatment for assessing the root morphology, root length, and alveolar bone loss. Sagittal slices were evaluated at the widest labial-lingual width of the tooth in the axial view. All variables were evaluated by Simplant 13.0 software (Materialise Dental NV, Leuven, Belgium). Results: The rank sum test indicated that the root length of two groups showed a statistically significant difference between the impacted and homonym tooth, with a shorter length in the impacted tooth (P , .05). The D-value (difference of root length between the impacted and homonym tooth) and alveolar bone loss on the labial side of the impacted incisor are significantly less in the early-treated groups when compared with the later-treated groups (P , .05). Spearman rank correlation analysis showed a statistically positive association between the treatment timing and D-value (r 5 .623, P , .05). The chi-square test for morphology of root apex indicated that the incidence of the root-apex-directed labial side is significantly higher in the later-treated groups when compared with the early-treated groups. Conclusion: The labial inversely impacted maxillary central incisors should be treated early to promote root development by achieving a better morphology of root apex, thus reducing the risk of alveolar bone loss on the labial side. (Angle Orthod. 2016;86:768-774.)

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Section: Discussionmentioning

confidence: 62%

Section: Methodsmentioning

confidence: 99%

The treatment timing of labial inversely impacted maxillary central incisors: A prospective study

Sun

Ren

et al. 2016

The Angle Orthodontist

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“…6,8,[14][15][16] In the study of Kim et al, vertical alveolar bone levels and alveolar bone thickness were compared between lower and upper incisors in surgical skeletal class III patients; they found that the amount of bone loss at the lower incisors was greater than that of the uppers, and lingual bone thickness was greater at the upper incisors and smaller at the opposing teeth. 17 When Baysal et al compared alveolar bone thickness between skeletal class I and II malocclusions, the observations were that buccal alveolar bone thicknesses in class I patients were significantly greater than those in class II patients, and that the buccal apical alveolar bone thickness was greater than lingual in class II malocclusions. 18 Earlier studies about the density of the lower alveolar bone were made with the help of pyknometry, microradiography or histoquantification.…”

Section: Jcdpmentioning

confidence: 99%

Evaluation of Bone Thickness and Density in the Lower Incisors’ Region in Adults with Different Types of Skeletal Malocclusion using Cone-beam Computed Tomography

Al-Masri¹,

Ajaj²,

Hajeer³

et al. 2015

The Journal of Contemporary Dental Practice

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Objectives: To evaluate the bone thickness and density in the lower incisors' region in orthodontically untreated adults, and to examine any possible relationship between thickness and density in different skeletal patterns using cone-beam computed tomography (CBCT). Materials and methods:The CBCT records of 48 patients were obtained from the archive of orthodontic department comprising three groups of malocclusion (class I, II and III) with 16 patients in each group. Using OnDemand 3D ® software, sagittal sections were made for each lower incisor. Thicknesses and densities were measured at three levels of the root (cervical, middle and apical regions) from the labial and lingual sides. Accuracy and reliability tests were undertaken to assess the intraobserver reliability and to detect systematic error. Pearson correlation coefficients were calculated and one-way analysis of variance (ANOVA) was employed to detect significant differences among the three groups of skeletal malocclusion.Results: Apical buccal thickness (ABT) in the four incisors was higher in class II and I patients than in class III patients (p < 0.05). There were significant differences between buccal and lingual surfaces at the apical and middle regions only in class II and III patients. Statistical differences were found between class I and II patients for the cervical buccal density (CBD) and between class II and III patients for apical buccal density (ABD). Relationship between bone thickness and density values ranged from strong at the cervical regions to weak at the apical regions. Conclusions:Sagittal skeletal patterns affect apical bone thickness and density at buccal surfaces of the four lower incisors'

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“…Edwards (1976) and Hwang and Moon (2001) reported the limitation of alveolar bone modeling and remodeling during retraction and intrusion of maxillary incisors. Kim Y. et al (2009) evaluated alveolar bone loss around incisors in surgical skeletal Class III patients, and Nelson and Artun (1997) showed the relationship between age and alveolar bone loss. Wehrbein et al (1995) and Evangelista et al (2010) appraised the prevalence of alveolar bone dehiscence in untreated patients and subjects who have undergone tooth retraction.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional evaluation of upper anterior alveolar bone dehiscence after incisor retraction and intrusion in adult patients with bimaxillary protrusion malocclusion

Guo

Zhang

Liu

et al. 2011

J. Zhejiang Univ. Sci. B

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Abstract:Objective: The purpose of this study was to evaluate three-dimensional (3D) dehiscence of upper anterior alveolar bone during incisor retraction and intrusion in adult patients with maximum anchorage. Methods: Twenty adult patients with bimaxillary dentoalveolar protrusion had the four first premolars extracted. Miniscrews were placed to provide maximum anchorage for upper incisor retraction and intrusion. A computed tomography (CT) scan was performed after placement of the miniscrews and treatment. The 3D reconstructions of pre-and post-CT data were used to assess the dehiscence of upper anterior alveolar bone. Results: The amounts of upper incisor retraction at the edge and apex were (7.64±1.68) and (3.91±2.10) mm, respectively, and (1.34±0.74) mm of upper central incisor intrusion. Upper alveolar bone height losses at labial alveolar ridge crest (LAC) and palatal alveolar ridge crest (PAC) were 0.543 and 2.612 mm, respectively, and the percentages were (6.49±3.54)% and (27.42±9.77)%, respectively. The shape deformations of LAC-labial cortex bending point (LBP) and PAC-palatal cortex bending point (PBP) were (15.37±5.20)° and (6.43±3.27)°, respectively. Conclusions: Thus, for adult patients with bimaxillary protrusion, mechanobiological response of anterior alveolus should be taken into account during incisor retraction and intrusion. Pursuit of maximum anchorage might lead to upper anterior alveolar bone loss.

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Alveolar Bone Loss around Incisors in Surgical Skeletal Class III Patients

Cited by 99 publications

References 25 publications

The treatment timing of labial inversely impacted maxillary central incisors: A prospective study

The treatment timing of labial inversely impacted maxillary central incisors: A prospective study

Evaluation of Bone Thickness and Density in the Lower Incisors’ Region in Adults with Different Types of Skeletal Malocclusion using Cone-beam Computed Tomography

Three-dimensional evaluation of upper anterior alveolar bone dehiscence after incisor retraction and intrusion in adult patients with bimaxillary protrusion malocclusion

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