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Results for “Root Resorption”

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At least 1,099 records · Page 61Linked to original sources

PubMed1996

Ectopically erupting mandibular first permanent molar: treatment of a case.

This case report presented a rare case of irreversible ectopic eruption of right mandibular first permanent molar in a 6-year-old boy. Distal root resorption of primary second molar was found during routine radiographic examination. Early treatment of ectopically erupting permanent first molar was considered in favor of preventing space loss. Using a modified Humphrey appliance as the correcting appliance, the ectopic eruption of permanent first molar had been successfully uprighted and retained.

Child↗

PubMed2005

Auto-transplantation in the restorative management of traumatized anterior teeth: a case report.

UNLABELLED: Auto-transplantation can be used to replace missing anterior teeth following traumatic injuries. This technique has the advantage (over other forms of treatment) of maintaining alveolar bone height which allows orthodontic and further restorative intervention by way of implants later in life. Careful restorative management of transplanted teeth is vital to their long-term survival as inadequate maintenance post transplant may result in root resorption and eventual tooth loss. This paper describes the restorative management of two cases following transplantation. CLINICAL RELEVANCE: Dental practitioners should be aware of the option to auto-transplant teeth as part of an overall treatment plan and the subsequent interventions often required.

Adolescent↗

PubMed2005

Development of a model for the simulation of orthodontic load on lower first premolars using the finite element method.

AIM: This study was undertaken to calculate the stress in the tooth, surrounding periodontal ligament, and in the alveolar bone when a lower first premolar is subjected to intrusion or torque movement using a constant moment. Root resorptions occur even when very low forces and moments are used in orthodontic therapy. It is therefore of great interest to determine and measure the stress that occurs under particular treatment conditions in the periodontal ligament. MATERIAL AND METHODS: In this study, three finite element calculations were carried out with a realistic 3D model developed by CT data that consisted of a lower premolar, the surrounding periodontal ligament and alveolar bone. In close reference to the in-vivo experiments carried out by Faltin et al. in São Paulo, Brazil, our model was subjected to an intrusive force on the premolar of 0.5 N and a lingual root torque of 3 Nmm. RESULTS: The three main stress directions and hydrostatic stress were quantified in all the surrounding tissues, revealing that the hydrostatic stress profile in the periodontal ligament correlated closely with resorption findings in Faltin et al.'s patients. Resorption occurred in the experimental study in Brazil when the hydrostatic stress exceeded capillary blood pressure in the periodontal ligament. CONCLUSION: We maintain that hydrostatic stress represents a suitable indicator for potential root resorptions caused by higher forces and moments, making it a helpful tool in the development of new orthodontic appliances. We must of course mention that there are many factors other than forces that are responsible for resorptions. But at the moment, only the force can be influenced by the orthodontist.

Bicuspid↗

PubMed2004

Periodontal repair in dogs: evaluation of a bioresorbable calcium phosphate cement (Ceredex) as a carrier for rhBMP-2.

BACKGROUND: Recombinant human bone morphogenetic protein-2 (rhBMP-2) has been shown to induce clinically relevant bone formation for orthopedic, craniofacial, and oral indications. It appears critical, in particular for onlay indications, that the associated carrier technology exhibits structural integrity to offset compressive forces in support of rhBMP-2-induced bone formation. The objective of this study was to evaluate a calcium phosphate (CP) cement, Ceredex, as a candidate carrier for rhBMP-2 in a defect model with limited osteogenic potential. MATERIALS: Bilateral, critical size, 6-mm, supra-alveolar, periodontal defects were created in six, adult, male, Hound Labrador mongrels. Three animals received rhBMP-2/Ceredex (rhBMP-2 at 0.20 and 0.40 mg/ml) in contralateral defect sites (implant volume/defect approximately 1 ml). One defect site in each of the three remaining animals received Ceredex without rhBMP-2 (control). The animals were euthanized at 12 weeks postsurgery for histologic and histometric analysis. RESULTS: Mean induced bone height exceeded 80% of the defect height for supra-alveolar periodontal defects receiving rhBMP-2/Ceredex without major differences between rhBMP-2 concentrations compared with approximately 40% for the control. The newly formed bone, a mixture of lamellar and woven bone in fibrovascular tissue, circumscribed relatively large portions of the residual Ceredex biomaterial. Inflammatory lesions were associated with limited bone formation in some sites. From a periodontal perspective, sites receiving rhBMP-2/Ceredex exhibited increased cementum formation compared with control, but without a functionally oriented periodontal ligament, and increased ankylosis and root resorption. Control sites exhibited early wound failure and exposure, loss of the Ceredex biomaterial, and limited bone formation. CONCLUSIONS: The Ceredex CP cement appears a potentially promising carrier technology for rhBMP-2 onlay indications. However, a slow resorption rate may prevent its wider use. This study does not support use of the rhBMP-2/Ceredex combination for periodontal indications.

Absorbable Implants↗

PubMed1990

[Autografts and tooth transplants. Operative indications].

In order to evaluate the prognosis in tooth transplant procedure the literature on this subject was reviewed. The survival of the periodontal ligament is necessary to prevent ankylosis and root resorption. In order to obtain optimal clinical results, the following guidelines are proposed: preparation of the recipient site 2 weeks prior to graft placement, preservation of intact Pdl at time of extraction, rapid reimplantation of tooth in new socket, short term contention (2-3 weeks); endodontic therapy 8-10 weeks after tooth transplantation.

Adolescent↗

PubMed2004

Bone regeneration by bodily tooth movement: dental computed tomography examination of a patient.

A 32-year-old man was examined with computed tomography before and after orthodontic treatment, and alveolar bone levels at the edentulous spaces were assessed. When the computed tomography scans were compared, 2.2 to 5.2 mm of additional craniocaudal alveolar bone remodeling by bodily tooth movement was found in the space-opening region. Bodily movement was achieved with single- and crossed-lever-arm mechanics. Root resorption measuring 1 to 4 mm was observed at the mandibular anterior region, where teeth were used for anchorage to upright the molars.

Adult↗

PubMed2000

Orthodontic tooth movement in the prednisolone-treated rat.

Adverse effects of corticosteroids on bone metabolism raise concerns as to whether steroid treatment may influence orthodontic movement. This study examined the effect of prednisolone on orthodontic movement using an established rat model. The corticosteroid treated group (N = 6) was administered prednisolone (1 mg/kg) daily, for a 12-day induction period; the control group (N = 6) received equivalent volumes of saline. On day 12, an orthodontic appliance was placed which exerted 30 g of mesial force to the maxillary first molar. Animals were sacrificed on day 24 and tooth movement was measured. Sagittal sections of the molars were stained with haematoxylin and eosin, and for tartrate-resistant acid phosphatase (TRAP) activity. While there were no significant differences in the magnitude of tooth movement between the 2 groups, steroid-treated rats displayed significantly less root resorption on the compression side and fewer TRAP-positive cells within the PDL space on the same side. This suggests steroid treatment suppressed clastic activity.

Acid Phosphatase↗

PubMed2002

Rehabilitative treatment after unsuccessful teeth replantation: a case report.

A nine-year-old boy suffered a severe facial trauma in a bicycle crash, which resulted in the avulsion and subluxation of upper central incisors. Teeth were repositioned and stabilized, attempting to achieve a successful replantation. Root resorption occurred, teeth were extracted, followed by orthodontic treatment, and esthetic procedures, modifying laterals and canines. This article reports an attempt and failure of replantation, providing alternatives for achieving patient's satisfaction, applying a variety of techniques and areas of dental profession.

Bicycling↗

PubMed1989

[Oxygen metabolism in roots resorbing granulated tissue from bovine deciduous teeth, from the aspects of superoxide dismutase, lactate dehydrogenase, and lipid peroxidation].

Root resorbing of deciduous teeth is a general phenomenon during eruption of the permanent teeth. In the present study, we tried to clarify the active-oxygen metabolism of root resorped granulated tissues. Granulated tissues were obtained from two fresh mandibles of young bovine about 1 year old undergoing root resorption. Cu-Zn-Superoxide dismutase (SOD), Mn-SOD, Lactate dehydrogenase (LDH), and concentration of lipid-peroxidated products were determined on the supernatants from homogenized tissues. We obtained the following results. 1) Cytosolic Cu-Zn-SOD activity did not elevate as compared to control tissues. 2) Elevation of mitochondrial Mn-SOD activity was observed in granulated tissues. 3) LDH activity did not elevate as compared to control tissues. 4) Lipid-peroxidated products in granulated tissues showed high concentration as compared to control tissues. Based on the above, we specurated that the active-oxygen metabolism in the root resorped granulated tissues, at least in mitochondria, was elevated.

Animals↗

PubMed1994

A method to determine the location and shape of an intracoronal bleach barrier.

The external cervical root resorption associated with intracoronal bleaching of pulpless teeth can be a devastating lesion. It often cannot be repaired. To prevent this problem, increasing attention has been focused on placing a barrier between the pulp chamber and the endodontic filling material. The objective of this article is to propose a method for determining the location and shape of an intracoronal bleach barrier.

Dental Pulp Devitalization↗

PubMed1999

Contemporary treatment of the resorbed avulsed tooth: a case report.

This report describes the treatment sequence after traumatic loss of a maxillary central incisor in a 15-year-old patient. Following extraoral root canal treatment and initially successful replantation, the case presented 9 years later with complete root resorption. After augmentation with an autologous mandibular corticocancellous graft, a dental implant was placed in a second stage surgery. The case highlights the challenge facing clinicians in providing the appropriate standard of care for today's treatment options.

Adolescent↗

PubMed1990

Dental implant reconstruction after endodontic failure: report of case.

Avulsion of natural teeth caused by trauma may present an unusual problem for the general practitioner. Endodontic therapy and replantation of the tooth into the socket have a relatively low long-term prognosis because of internal or external root resorption. Dental implants can provide proper support and function for missing teeth with excellent esthetic results without preparation of natural dentition. In this case report, an implant system is used to restore an anterior space created by the loss of endodontically treated central and lateral incisors.

Adult↗

PubMed1994

Replantation in general dental practice.

This paper presents a comparison of the outcome of two cases where teeth, avulsed in sporting accidents, were replanted in general dental practice and have been reviewed for 5 years. Avulsed teeth which were stored dry, had a long extra-alveolar period and were splinted for a longer period of time, ultimately underwent replacement root resorption (case 1). There was no evidence of resorption, after 5 years, in the tooth that was stored in the patient's own saliva and was replanted within 45 minutes of being avulsed (case 2). The replantation procedure for these two cases was based on recent literature, which is also reviewed in this paper, and a protocol for the management of avulsed teeth is suggested.

Adolescent↗

PubMed1990

Endodontic management of the avulsed tooth and tooth transplantation.

The major causes of post-transplantation tooth loss following tooth replacement after avulsion (exarticulation) and surgical replacement of impacted maxillary canines (auto-transplantation) are inflammatory root resorption and replacement resorption (ankylosis). This paper attempts to outline the treatment and management of replanted teeth using the current philosophies of splinting, endodontic therapy and the use of calcium hydroxide in the re-attachment of the periodontal ligament (PDL). Clinical research during the past 20 years has provided sufficient information for the development and establishment of a rational and effective program of treatment.

Ankylosis↗

PubMed1989

Unusual case of silver cone disintegration.

An unusual case of silver cone disintegration associated with progressive root resorption is reported. The use of the scanning electron microscope and the electron microprobe provided evidence of different states of corrosion in two remaining silver cones. Light microscopic examination showed the presence of silver particles apparently released from the disintegrated or progressively corroded cones in the surrounding tissues. The possible interaction between such silver accumulations or their chemical combinations with other elements and the tissue is discussed.

Corrosion↗

PubMed2001

Interdental wiring in jaw fractures: effects on teeth and surrounding tissues after a one-year follow-up.

Several authors have suggested that interdental wiring may have an adverse effect on the teeth and surrounding tissues. In the present study we examined 250 teeth that had been subjected to wiring and 142 adjacent teeth that had not been wired (controls). During the wiring period, and after a minimum of 1 year following treatment of the jaw fracture, the teeth and periodontal tissues were examined by periodontal probing, percussion sound test, mobility test, sensitivity test, and radiography. One tooth showed temporary increased mobility. Periodontal health was clinically and radiologically fully restored after a year in all teeth. Progressive caries was seen in 2 patients and was treated. Loss of sensitivity was seen in 3 teeth adjacent to the fracture site and in one tooth adjacent to a titanium cortical screw. However, these pulpal changes either recovered spontaneously or were treated endodontically. There were few late problems in the teeth and surrounding tissues. In 243 teeth (97%), completely healthy conditions were found in pulp and periodontium. There was no evidence of root resorption or dentoalveolar ankylosis. We conclude that late deleterious effects on the teeth and periodontal tissues from interdental wiring in the treatment of jaw fractures were uncommon 1 year after the removal of the interdental wiring.

Adolescent↗

PubMedDate not supplied

Radiographic success of ferric sulfate and formocresol pulpotomies in relation to early exfoliation.

PURPOSE: The purpose of this retrospective study was to evaluate the radiographic findings with formocresol and ferric sulfate pulpotomies in relation to early tooth loss. METHODS: Vital pulpotomies with either ferric sulfate or formocresol, performed by faculty members between 1992 and 2002 at The University of Iowa, were evaluated retrospectively. Radiographic criteria were established to assess success or failure of the treated tooth. This was then correlated with time of tooth loss and space management. RESULTS: Eighty-five molars, followed between 6 to 61 months, met the inclusion criteria. Of these, 15 (43%) teeth treated with ferric sulfate, 23 (56%) treated with formocresol, and 5 (55%) treated with a combination of ferric sulfate and formocresol remained free of any radiographic pathology. Overall, 13% of the pulpotomized teeth were prematurely lost due to abscess formation and in need of space management. Regardless of the treatment type, internal root resorption was the most common cause of premature exfoliation. CONCLUSIONS: Both ferric sulfate and formocresol pulpotomies can lead to premature exfoliation of primary teeth, with the subsequent need for orthodontic space maintenance. Therefore, radiographic criteria should be taken into consideration when evaluating pulpotomized teeth at recall visits.

Alveolar Bone Loss↗

PubMed2002

Craniofacial and dental manifestations of Proteus syndrome: a case report.

The Proteus syndrome is a rare congenital hamartomatous condition that is characterized by a wide range of malformations, sometimes involving the face. Common manifestations include partial gigantism, congenital lipomas, and plantar hyperplasia. In this report we describe the craniofacial clinicopathological development in a girl with Proteus syndrome from age 6 to 20 years. The patient had pronounced hemifacial hypertrophy, exostoses in the left parietal region, and enlargement of the inferior alveolar nerve and mandibular canal in the affected region. The dental development of the affected left mandible and maxilla was characterized by extremely premature development and eruption of the primary and permanent teeth and by pronounced idiopathic root resorptions. The multidisciplinary management of the patient and the treatment outcome is reported. A review of the Proteus patients in the literature who exhibited manifestation in the craniofacial region is presented.

Adolescent↗