Bone Density and Dental External Apical Root Resorption

Iglesias-Linares, Alejandro; Morford, Lorri A.; Hartsfield, James K.

doi:10.1007/s11914-016-0340-1

Cited by 36 publications

(21 citation statements)

References 70 publications

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“…The ovariectomized animal model has an increased bone turnover rate; therefore, it has been widely used for the study of osteoporosis [21,22]. Bone turnover rate is closely associated with the speed of the orthodontic tooth movement [23]. The speed of bone formation is slower than that of bone resorption during the rapid orthodontic tooth movement [24].…”

Section: Introductionmentioning

confidence: 99%

The Administration of 4-Hexylresorcinol Accelerates Orthodontic Tooth Movement and Increases the Expression Level of Bone Turnover Markers in Ovariectomized Rats

Choi

Kim

Lee

et al. 2020

IJMS

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Surgical methods for accelerating orthodontic tooth movement are limited by possible damage to the tooth root and patient discomfort. 4-Hexylresorcinol (4HR) has been shown to increase bone remodeling and may potentially facilitate tooth movement. This study investigated the (1) effect of 4HR administration on osteoblast-like cells and (2) effect of 4HR administration on tooth movement in ovariectomized rats. Saos-2 cells were treated with either 4HR or solvent (control). Protein expression levels were investigated 2, 8, and 24 h after treatment. Thirty ovariectomized Sprague-Dawley rats were divided into two experimental groups (A and B) and one control group. After installation of an orthodontic tooth movement device, groups A and B received subcutaneous weekly injections of 4HR (1.28 and 128 mg/kg). Micro-computerized tomography and histological analyses were performed after 2 weeks of tooth movement. The application of 4HR elevated expression of osteogenic markers in Saos-2 cells. Movement of the first molars was significantly greater in rats administered 4HR. Furthermore, the expression of bone morphogenic protein-2, receptor activator of nuclear factor kappa-B ligand, osteocalcin, and tartrate-resistant acid phosphatase were increased after 4HR administration. 4HR application demonstrated increased expression of osteogenic markers in Saos-2 cells and accelerated orthodontic tooth movement in rats.

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Section: Introductionmentioning

confidence: 99%

The Administration of 4-Hexylresorcinol Accelerates Orthodontic Tooth Movement and Increases the Expression Level of Bone Turnover Markers in Ovariectomized Rats

Choi

Kim

Lee

et al. 2020

IJMS

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“…Understanding the mechanisms, cephalometric changes and adverse effects related to overbite reduction using different treatment approaches can help clinicians make treatment planning more precise. In the present study, patients presenting maxillary incisors with a history of some kind of trauma, endodontic treatment, or patients with any systemic disease or periodic medication were excluded since there is a relationship between these disorders and root resorption [24][25][26][27]. The study showed that significant changes occurred as a consequence of orthodontic treatment assisted by miniscrews.…”

Section: Discussionmentioning

confidence: 99%

One versus two anterior miniscrews for correcting upper incisor overbite and angulation: a retrospective comparative study

et al. 2020

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Background: Miniscrews are effective devices for performing upper incisor intrusion. Different mechanics can be applied depending on the treatment objectives. This study aimed to evaluate the efficacy of one or two anterior miniscrews for upper incisor correction in cases of overbite and angulation in adult patients. Methods: Forty-four adults with deep overbite were divided into two groups: group 1 was treated with one miniscrew between upper central incisors and group 2 with two miniscrews between upper lateral incisors and canines. Incisor intrusion and length were measured from lateral cephalograms before treatment, after treatment and at least 12 months into retention (T0, T1 and T2). Forces were applied (90 g) from the miniscrews to the archwire using elastomeric chains. ANOVA analysis was used to determine whether differences between evaluation times were statistically significant. Results: Mean root resorption was 2.15 ± 0.85 mm, which ceased after active treatment. Overbite mean correction was − 3.23 ± 1.73 mm with no statistically significant relapse. Overbite correction and incisor intrusion were significantly greater in group 2 (− 3.80 ± 1.43 versus − 2.75 ± 1.63 for OB and 8.19 ± 3.66 versus 5.69 ± 2.66 for intrusion). Resorption and overbite correction were positively related. No counterclockwise rotation of the mandibular plane was observed. Conclusions: Overbite correction can be performed by means of upper incisor intrusion without rotation of the mandibular plane. Correction of upper incisor intrusion and overbite is greater in patients treated with two miniscrews. The increase in upper incisor buccal angulation is greater with one miniscrew. Root resorption is positively related to the extent of intrusion. Stability is satisfactory regardless of whether one or two miniscrews are used.

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“…In current study, lateral incisors have more significant resorption rate which was similar to (Jamil & Alam, 2017), many Factors have been reported in the literature as a confounding to greater root resorption including and not limited to the extent of tooth movement combined with tooth type and the nature of the force applied. (Elhaddaoui et al, 2016) root morphology and its periodontal membrane and bone association all these factors will lead to a cascade of root resorption (Iglesias-Linares et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

External Root Resorption after Orthodontic Treatment with Invisalign®: A Retrospective Study

AlSagr¹,

AlMujel²,

AlShiha³

et al. 2020

GJHS

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AIM: To measure the incidence and severity of root resorption after orthodontic treatment with Invisalign. MATERIAL AND METHODS: This retrospective study was conducted at Riyadh, Saudi Arabia from June 2017 to January 2018. Pre- treatment and post-treatment Orthopantographs were obtained from orthodontic records of 29 patients managed with aligners (Invisalign®, Align Technologies, Santa Clara, CA, USA) at different dental clinics in Riyadh City. The selected sample was fulfilled the following criteria: (1) Class I malocclusion, (2) Mild to moderate crowding, (3) Non-extraction orthodontic treatment, (3) No evidence of root resorption before orthodontic treatment, (4) No root abnormalities or dilaceration, and (5) Good quality of pre- and post-treatment Orthopantographs. One examiner performed the measurements directly on the Orthopantographs using electronic digital caliper (Mitutoyo Manufacturing Co. Ltd., Tokyo, Japan) with an accuracy of 0.01mm. The measurements were performed on maxillary and mandibular central incisors, lateral incisors, and canines pre- and post-operatively, resulting in a total of 696 measurements. The crown length was measured from incisal edge to cemento- enamel-junction, while the root length from cemento-enamel-junction to root apex. RESULTS: In our study, 72% of the teeth demonstrated root resorption, in regard to the severity of root resorption, we found that mild root resorption > 0% up to 2% in all the affected teeth. Upper Anterior teeth have more significant resorption rate than lower anterior teeth P<0.05. CONCLUSION: The present study showed that incidence of root resorption was high after orthodontic treatment with Invisalign®, however the severity is very low and it is limited to the surface resorption only.

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Bone Density and Dental External Apical Root Resorption

Cited by 36 publications

References 70 publications

The Administration of 4-Hexylresorcinol Accelerates Orthodontic Tooth Movement and Increases the Expression Level of Bone Turnover Markers in Ovariectomized Rats

The Administration of 4-Hexylresorcinol Accelerates Orthodontic Tooth Movement and Increases the Expression Level of Bone Turnover Markers in Ovariectomized Rats

One versus two anterior miniscrews for correcting upper incisor overbite and angulation: a retrospective comparative study

External Root Resorption after Orthodontic Treatment with Invisalign®: A Retrospective Study

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