Severe external apical root resorption—local cause or genetic predisposition?

Sehr, Kathrin; Bock, Niko C.; Serbesis, Christos; Hönemann, Mario; Ruf, Sabine

doi:10.1007/s00056-011-0036-1

Cited by 15 publications

(16 citation statements)

References 54 publications

(246 reference statements)

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“…To measure and assess RR, 2-dimensional radiographs are still presently a common method [13,25]. A striking limitation of this method is that only ARR can be measured.…”

Section: Discussionmentioning

confidence: 99%

“…The degree of ARR seems to be underestimated in panoramic radiographs compared to CBCT [9], when using a scoring system like Levander and Malmgren [9]. Instead of measuring metrically the tooth length in 2-dimensional panoramic radiographs many studies classified changes of the root length in resorption stages [13,26]. We evaluated the relative change of RCR in percentage.…”

Section: Discussionmentioning

confidence: 99%

“…Considering genetic factors influencing the incidence of ARR, Sehr et al [13] reported that local rather than systemic or genetic factors seemed to have predisposed the subjects of their sample to ARR. Other publications of animal experimental or human studies found various candidate genes potentially directly linked to the development of severe root resorption [2,8,14].…”

Section: Introductionmentioning

confidence: 99%

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Apical root resorption during orthodontic treatment with aligners? A retrospective radiometric study

et al. 2013

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IntroductionObjective of this study was to investigate the incidence and severity of apical root resorptions (ARR) during orthodontic treatment with aligners.Materials and methodsThe sample comprised 100 patients (17–75 years of age) with a class I occlusion and anterior crowding before treatment, treated exclusively with aligners (Invisalign®, Align Technologies, Santa Clara, CA, USA). The following teeth were assessed: upper and lower anterior teeth and first molars. Root and crown lengths of a total of 1600 teeth were measured twice in pre- and post-treatment panoramic radiographs. Afterwards, relative changes of the root length during treatment were calculated by a root-crown-ratio taking pre- and post-treatment root and crown lengths into consideration. A reduction of this ratio was considered as a shortening of the initial root length. Additionally, tooth movements of the front teeth were assessed by lateral cephalograms and the 3-dimensonal set up of each patient.ResultsAll patients had a reduction of the pre-treatment root length with a minimum of two teeth. On average 7.36 teeth per patient were affected. 54% of 1600 measured teeth showed no measurable root reduction. A reduction of >0%-10% of the pre-treatment root length was found in 27.75%, a distinct reduction of >10%-20% in 11.94%. 6.31% of all teeth were affected with a considerable reduction of >20%. We found no statistically significant correlation between relative root length changes and the individual tooth, gender, age or sagittal and vertical orthodontic tooth movement; except for extrusion of upper front teeth, which was considered as not clinical relevant due to the small amount of mean 4% ARR.ConclusionsThe present study is the first analyzing ARR in patients with a fully implemented orthodontic treatment with aligners (i.e. resolving anterior crowding). The variety was high and no clinical relevant influence factor could be detected. A minimum of two teeth with a root length reduction was found in every patient. On average, 7.36 teeth per patient were affected.

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“…To measure and assess RR, 2-dimensional radiographs are still presently a common method [13,25]. A striking limitation of this method is that only ARR can be measured.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Apical root resorption during orthodontic treatment with aligners? A retrospective radiometric study

et al. 2013

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“…SEARR are present when more than 1/3 of the root is resorpted. With conventional brackets (Non-SL) sEARR occurred in about 0.5% of patients under orthodontic treatment [27]. …”

Section: Introductionmentioning

confidence: 99%

Root resorption, treatment time and extraction rate during orthodontic treatment with self-ligating and conventional brackets

et al. 2014

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IntroductionThis study determined the amount and severity of EARR (external apical root resorption) after orthodontic treatment with self-ligating (SL) and conventional (Non-SL) brackets. Differences regarding rate of extraction cases, appointments and treatment time were evaluated.Material and methods213 patients with a mean age of 12.4 ± 2.2 years were evaluated retrospectively. The treatments were performed with SL brackets (n = 139, Smartclip, 3 M Unitek, USA) or Non-SL brackets (n = 74, Victory Series, 3 M Unitek, USA). Measurements of the crown and root length of the incisors were taken using panoramic radiographs. Three-factor analysis of variance (ANOVA) was performed for an appliance effect.ResultsThere was no difference between patients treated with Non-SL or SL brackets regarding the amount (in percentage) of EARR (Non-SL: 4.5 ± 6.6 vs. SL: 3.0 ± 5.6). Occurrence of severe EARR (sEARR) did also not differ between the two groups (Non-SL 0.5 vs. SL: 0.3). The percentage of patients with need of tooth extraction for treatment (Non SL: 8.1 vs. SL: 6.9) and the number of appointments (Non-SL: 12.4 ± 3.4 vs. SL: 13.9 ± 3.3) did not show any differences. The treatment time was shorter with Non-SL brackets (Non-SL: 18.1 ± 5.3 vs. SL: 20.7 ± 4.9 months).ConclusionsThis is the largest study showing that there is no difference in the amount of EARR, number of appointments and extraction rate between conventional and self-ligating brackets. For the first time we could demonstrate that occurrence of sEARR does not differ between the two types of brackets.

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“…This is why even if severe cases are detected, they are relatively uncommon 19 . Sehr et al 33 examined a little more than 3000 patients who underwent multi-bracket treatment between 1991 and 2010: severe apical resorptions were detected in 16 patients. Makedonas 23 confirms that the literature only comes up with an insignificant percentage of moderate to severe cases of resorption.…”

Section: What Are the Therapeutic Solutions?mentioning

confidence: 99%

Orthodontically induced inflammatory root resorption: apical and cervical complications

Lunardi¹,

Bécavin²,

Gambiez³

et al. 2013

J Dentofacial Anom Orthod

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Severe external apical root resorption—local cause or genetic predisposition?

Abstract: The incidence of SEARR on maxillary incisors during MB treatment (0.5%) was very low compared to the literature. With only 12.5% of SEARR patients presenting four affected teeth, local rather than systemic/genetic factors seem to have predisposed the present subjects to SEARR.

Cited by 15 publications

References 54 publications

Apical root resorption during orthodontic treatment with aligners? A retrospective radiometric study

Apical root resorption during orthodontic treatment with aligners? A retrospective radiometric study

Root resorption, treatment time and extraction rate during orthodontic treatment with self-ligating and conventional brackets

Orthodontically induced inflammatory root resorption: apical and cervical complications

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