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Results for “Root Resorption”

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At least 343 records · Page 19Linked to original sources
PubMed1998

Radiographic assessment of simulated external root resorption cavities in maxillary incisors.

Upper central and lateral incisors of three human skulls were used to assess radiographically the possibility of detecting cavities of different sizes and locations, drilled to simulate external root resorptions. The sequence of radiographs was evaluated by three endodontists, who were unaware of the experiment being done, using a 2 x magnifier. The first observation was done without comparing the radiographic images of the different cavities with the preoperative radiograph. For the second round of observation, each sequence was compared with the preoperative X-ray. The results showed that small cavities were more difficult to detect than the medium and large ones. Moreover, cavities located on the proximal surfaces were more easily detected than those located on the buccal surfaces. Finally, when the observers could compare with the preoperative radiographs (second round of observation), the rate of detection was considerably higher.

Chi-Square Distribution↗
PubMed2000

External apical root resorption following orthodontic treatment.

This study investigated the association of appliance type and tooth extraction with the incidence of external apical root resorption (EARR) of posterior teeth following orthodontic treatment. Pre- and posttreatment orthopantomograms were compared for 97 patients and a 4-grade ordinal scale used to measure EARR. The incidence of EARR was positively associated with tooth position (P < .001), appliance type (P = .038), and extractions (P = .001). This was observed in an overall analysis mutually adjusted for the effects of age at start of treatment, pretreatment overbite and overjet, use of headgear, tooth extraction, and type of appliance. The incidence of EARR was 2.30 times higher for Begg appliances compared with edgewise, and it was 3.72 times higher where extractions were performed.

Adolescent↗
PubMedDate not supplied

[Root resorption: preliminary considerations and case report].

This article presents a review of the literature on the action of 5 (five) possible predisponent agents of root resorption (treatment time, amount of dental movement, amount of force used, individual susceptibility and trauma) during orthodontic treatment and describes a clinical case with pronounced overjet and overbite where, the presence of resorption in one traumatized tooth limited the mechanics to light forces only.

Child↗
PubMed1988

Management of an avulsed tooth with severe root resorption.

Delayed replantation of an avulsed tooth with an open apex resulted in failure of revascularization, necrosis of the pulp and extensive external root resorption. Removal of the necrotic pulp and repeated intra-canal dressings of calcium hydroxide over a three year period arrested the inflammatory resorptive process. The process was replaced by replacement resorption leading to ankylosis and infra-occlusion of the affected tooth. As the tooth was asymptomatic, it was retained in the arch to act as a space maintainer. To improve aesthetics, the crown was recontoured using a light-cured resin.

Calcium Hydroxide↗
PubMed1992

Root resorption.

Several types of resorption affect teeth: internal, external, invasive, pressure, and idiopathic resorption. Diagnosis depends on an accurate medical and dental history, and radiographic and clinical examination. Because trauma appears to be a major factor associated with resorption, questions regarding past traumatic events may provide good leads to a likely cause. Treatment is determined based on a correct diagnosis. Root canal therapy is very beneficial in cases of internal resorption and external, inflammatory resorption. In cases of invasive resorption, it may or may not be necessary, whereas in replacement and pressure resorption, root canal therapy is not indicated at all (unless unrelated pulpal conditions necessitate endodontic intervention). Prevention of resorption includes appropriate treatment of traumatically injured teeth with frequent evaluation visits during the first year following an injury. Early detection of pressure-producing agents such as cysts, tumors, and impacted teeth can allow timely treatment to minimize the resorptive destruction.

Humans↗
PubMed1996

Treatment of a palatally impacted canine accompanied by root resorption of incisors: a case report.

This case report describes a simplified orthodontic system for the management of a palatally impacted canine accompanied by root resorption of incisors. The anchorage for this system is the transpalatal arch and a heavy buccal segment arch wire with two loops soldered to stainless steel bands. This type of stationary anchorage provides stability by uniting both molars across the palatal vault and thus avoids the need for bonding of adjacent mobile teeth. With this system an impacted canine can be extruded, moved distally, jumped over the occlusion, and derotated. The efficiency of this appliance makes it a safe method for moving teeth through simple manipulation and with minimal esthetic inconvenience.

Adolescent↗
PubMed2001

Deciduous canine and permanent lateral incisor differential root resorption.

When a permanent maxillary canine erupts apical to the permanent lateral incisor and the deciduous canine, resorption typically takes place only on the deciduous canine root. An understanding of this differential resorption could provide insight into the reasons for excessive iatrogenic root resorption during orthodontic tooth movement. The purpose of the present study was to examine the response of roots of permanent lateral incisors and deciduous canines to simulated resorption, and to acid and enzyme attack, reflecting the physiologic environment of an erupting permanent canine. Groups of maxillary permanent lateral incisor and deciduous canine roots were exposed to 5 combinations of Ten Cate demineralizing solution, Ten Cate demineralizing solution with EDTA, and a Type I collagenase solution. Sections of the roots were examined under a polarized light microscope. Analysis of variation of the resulting root lesions demonstrated that the lesion depths for deciduous canines were greater than those for permanent lateral incisors when averaged across 4 of the conditions (F(1,24) = 7.49, P =.0115). On average, deciduous canine roots demonstrated lesions 10% deeper than did permanent lateral incisor roots. We concluded that when deciduous canine and permanent lateral incisor roots are subjected to acid and enzyme attack, reflecting the physiologic environment of an erupting permanent canine, significantly deeper demineralized lesions are seen in the deciduous roots compared with the permanent roots. This finding may partially explain the differential root resorption during permanent tooth eruption.

Acids↗
PubMed1998

Root resorption of replanted teeth: an SEM study.

Two replanted and subsequently expelled upper central incisors were observed under a scanning electron microscope to study the changes brought about by root resorption. The severity of resorption and the distribution of the affected areas were different in the two specimens. In the first case, large, deep excavations were found along a continuous bone defect which exposed the opposite root canal wall. Bacteria-like elements were found on the bottom of the eroded areas both on the outer and on the inner root surfaces. In the second case, resorption denuded the apical portion of the metal post. Erosive lacunae were visible in some areas while tubiform excavations were present close to the apical margin exposing the collagen network. The roots in the first case likely underwent inflammatory resorption while replacement resorption was thought to have occurred in the second case.

Adolescent↗
PubMed1991

An ultrastructural evaluation of the relationship between epithelial rests of Malassez and orthodontic root resorption and repair in man.

Contrary to previous reports, epithelial cell clusters with ultrastructural features similar to classically defined epithelial rests of Malassez were found, for the first time, in areas of repairing orthodontic root resorption. These observations were made on the buccal root surface of premolars extracted for orthodontic purposes from adolescent patients who had required rapid maxillary expansion. Ultrastructurally, the epithelial clusters ranged in size from 2-8 cells and were characterized by the presence of true desmosomes (macula adherens) and tonofilaments. Certain ultrastructural features of the epithelial cell clusters indicate that they may be involved in mediating repair cementogenesis subsequent to migration into the resorption bay.

Adolescent↗
PubMedDate not supplied

Risk factors associated with atypical root resorption of the maxillary primary central incisors.

Maxillary occlusal radiographs of 233 children between 42 and 60 months old were examined for the presence or absence of atypical root resorption (ARR). In addition, the dental records of these children were examined to determine if an association existed between ARR, oral habits, documented trauma and overjet. Thirty-three (14.2%) of the patients had radiographic evidence of ARR of either maxillary primary incisor. Children with a positive history of both trauma to the incisors and oral habits had a statistically higher prevalence of ARR than those without either finding (P = .03). ARR was more prevalent as overjet increased, independent of trauma, and oral habits (P = .03). Furthermore, as the number of risk factors (large overjet, documented trauma, and oral habits) increased, the likelihood of developing ARR also increased.

Analysis of Variance↗
PubMed1985

Root resorption associated with placement of a ceramic implant. Report of a case.

Ceramic grafting material was used to treat a vertical osseous defect associated with a maxillary left lateral incisor tooth. The area was monitored at maintenance appointments. Root resorption was detected radiographically 12 months after grafting. At 18 months, resorption was evident clinically in the presence of moderate inflammation.

Adult↗
PubMed1992

Effect of intracoronal bleaching on external cervical root resorption.

The purpose of this study was to examine histologically and radiographically the effect of a bleaching agent, a mixture of sodium perborate and superoxol (30% hydrogen peroxide), without a heat source on the cervical root surface and periodontal tissue of endodontically treated teeth of dogs. Endodontic treatment was performed on anterior teeth of dogs. The endodontically treated teeth were then divided into two groups. One group received walking bleach procedures, while the other group did not. The animals were killed at intervals of 1 and 3 months after bleaching for histological and radiographic examination. External cervical root resorption was only observed in bleached teeth at 3-month but not at 1-month observation.

Animals↗
PubMed1999

Root resorption: another long-term outcome.

Case history is presented of an indigenous Zambian girl. Initial surgical repositioning is shown and at a later stage when the tooth had erupted into the nasolabial vestibule and an orthodontic correction was performed. Surgical trauma as well as orthodontic forces may have precipitated root resorption; however, the aim of saving a tooth has been achieved.

Child↗
PubMedDate not supplied

Root resorption: a complication following traumatic avulsion.

The viability of the periodontal ligament depends on the extraoral period; this viability decreases as the extraoral period of traumatically avulsed teeth increases. This case report describes the management of avulsed teeth replanted four hours after the initial trauma. Progressive root resorption was a problem.

Child↗