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At least 1,801 records · Page 100Linked to original sources
PubMed1983

Replantation of avulsed teeth after long extra-alveolar periods.

In 11 patients, 18 teeth, with extra-alveolar periods ranging from 6 h to 48 days were replanted after root-filling with chloroform resin and guttapercha. After observation periods from 1 to 7 years, only 1 tooth was lost (after 5 years), but the remaining 17 teeth were clinically well functioning. All teeth were ankylotic and subjected to replacement resorption of various extent. Inflammatory root resorption and periradicular osteitis were not observed. Marginal bone loss up to 5 mm was noticed, but was accompanied by gingival retraction and thus pathological periodontal pockets (5 mm) were not observed. Consequently, teeth replanted after long extra-alveolar periods (even several days) can function for many years and thus postpone prosthetic treatment.

Adolescent↗
PubMed2003

Early and unusual incisor resorption due to impacted maxillary canines.

A very early and severe case of maxillary incisor resorption caused by impacted canines is reported. An estimated 50,000 cases of ectopic eruption and impaction of maxillary canines occur each year in the United States. Although incisor resorption due to ectopically positioned permanent maxillary canines can be swift, silent, and devastating, an effective protocol has been developed for early detection and management of this condition. Palpation and, if indicated, radiographic evaluation are combined with primary canine removal in selected cases. These strategies--particularly when used early--can prevent the vast majority of palatally impacted maxillary canines and the potentially devastating resorption of adjacent incisors.

Child↗
PubMed1989

Dental and jaw changes in primary hyperoxaluria.

A case of teeth and jaw changes in primary hyperoxaluria is described. The patient, a 25-yr-old man, was treated by kidney transplantation twice, and finally by combined liver and kidney transplantation. The teeth and jaw changes consisted of deposition of oxalate crystals in the gingiva, in the pulp and in the vicinity of bone and dentin. The resorption of bone and dentin was extensive.

Adult↗
PubMed1978

A 2-year follow-up of primary molars, pulpotomized with a gentle technique and capped with calcium hydroxide.

The prognosis for pulpotomy of primary molars with calcium hydroxide as wound dressing was evaluated clinically and radiographically. Thirty-three primary mandibular molars were amputated under the following conditions: (1) chronic coronal pulpitis, (2) the amputation was done with diamond instruments and a high-speed machine under aseptic conditions, and (3) application of calcium hydroxide in contact with the wound surface. After 1 year the treatment was regarded as successful for 22 of the teeth (67%); 11 teeth showed internal dentin resorption. After 2 years the frequency of success, allowing for drop-out, was 59%. Internal dentin resorption was seen in 14 root canals; in 10 of them within the first 6 months. A histologic study of nine root pulps with internal dentin resorption revealed an extra-pulpal blood clot on the wound surface in five.

Blood Coagulation↗
PubMed1977

Histology of external and internal resorption.

Seven cases of resorption in teeth have been described. Three had large internal cavities penetrating the dentine to or from the exterior. One had internal resorption in two separate locations and another had internal resorption which may have been precipitated by carious involvement of the pulp. Two cases of external resoprtion were quite dissimilar, one possibly a reaction to canal infection, the other idiopathic. Various types of calcified material were found in the areas of resorption and odontoclasts were found in one case.

Adolescent↗
PubMed2006

[Resorption of two upper incisors in a 14-year-old boy].

A 14-year-old boy was referred because of a slight swelling of the alveolar mucosa of the right central and lateral maxillary incisor. Radiographically, a well-circumscribed radiolucency was seen between the vital, but partially resorbed roots of the two incisors. Treatment consisted of careful enucleation, including removal of the two teeth. Histopathological examination showed a central giant-cell granuloma. Healing was uneventful. Additional examination for the presence of hyperparathyroidism was negative. During one year follow-up, no signs of recurrence have been noticed.

Adolescent↗
PubMed1987

Radiographic examination of ectopically erupting maxillary canines.

This study analyzes the need for and possibility of obtaining further information from different radiographic procedures in 125 children with potential ectopic eruption of the maxillary canines. After clinical examination of 3,000 10 to 15-year-old children, it was found that 7% needed radiographic examinations for determination of the canine position. Eighty-four children (2.8%), with a total of 125 potential ectopically erupting maxillary canines diagnosed clinically and by means of periapical radiographs, were selected and a stepwise extended radiographic diagnostic procedure was used. Most canines in ectopic eruption were positioned palatally; the positions could be assessed with sufficient accuracy from conventional periapical films in 92% of the cases. Only in 37% of the cases, however, could the lateral incisor be projected free from the ectopic canine by the intraoral technique. The lamina dura of the lateral incisor facing the canine was often found to be interrupted. For 29% of the ectopic canines, the lateral incisors could neither be projected free nor judged free from resorptions and a supplementary polytomographic investigation was believed to be necessary. The number of resorbed teeth was doubled by polytomography and altogether 12.5% of the ectopic canines caused resorptions. A stepwise radiographic procedure including polytomography is described and recommended in cases of ectopic eruption of maxillary canines for determining the correct position and ruling out or confirming resorptions on incisors, thereby optimizing the orthodontic treatment planning.

Adolescent↗
PubMed1994

Intracoronal bleaching: concerns and considerations.

The history of intracoronal bleaching and the development of the walking bleach technique are reviewed. External cervical resorption associated with intracoronal bleaching is a serious sequela that has been reported in the literature. One explanation given for this phenomenon is that it results from an inflammatory process initiated by the presence of bleaching agents in the attachment apparatus. The basis for this conclusion is discussed. A review of published case reports on external cervical resorption associated with intracoronal bleaching revealed that: 100 per cent of the affected teeth had no intermediate dental base placed, 84 per cent were treated with a thermocatalytic technique, 80 per cent were bleached after the root canal sealer was fully set and 72 per cent had a history of trauma before bleaching. Based on these observations, it should be possible to safely bleach teeth intracoronally provided specific concerns and considerations are taken into account. These are: 1) the use of heat should be avoided; 2) an intermediate dental base should be placed with due respect to the attachment level; and 3) a base should be selected with due respect to its effectiveness in sealing tooth structure.

Borates↗
PubMed1993

Tissue formation on cementum surfaces in vivo.

The purpose of the present investigation was to study cell colonization of and tissue formation on denuded (anorganic) cementum surfaces as well as denuded demineralized cementum surfaces. The most conspicuous finding was the distinctly different pattern of cell colonization and subsequent tissue formation on etched and non-etched denuded cementum surfaces. Non-etched cementum surfaces displayed a limited number of resorbing cells and resorption lacunae, while etched cementum surfaces displayed an abundance of fibroblast-like cells in varying stages of activity in a meshwork of fibres, probably collagenous. These fibres were organized in a layer parallel to the root surface. This appearance of a fibrous capsule-like structure has previously been associated with periodontal healing with a non-functional repair-tissue. It may be concluded, based on the present results that, a cementum surface in which collagen fibers have been exposed presents a suitable surface for colonization by mesenchymal cells. However, if collagen fibers are not exposed in the cementum surface leaving mineralized surface, mesenchymal cells appear not to be able to attach.

Acid Etching, Dental↗
PubMed1990

Histological differences between teeth with adult periodontitis and prepubertal periodontitis.

Thirty-nine permanent teeth from three siblings aged 11 to 14 years were extracted because of generalized prepubertal periodontitis (PP) and studied histologically with light microscopy. Twenty healthy teeth (HT) removed for orthodontic procedures from 10 children of similar ages and 22 teeth affected by adult periodontitis (AP) extracted from patients over 50 years old were used as controls. The cementum of the PP teeth was much thicker than that of the healthy teeth. A high percentage of resorption, unrelated to inflammation, was found in all the teeth studied. In 24 PP teeth the cementum was infiltrated by microorganisms and bacterial substances. All PP teeth showed a cuticle ranging from 10 to 80 microns in thickness on the diseased cementum. No similar structure was noted on the diseased cementum of the AP teeth. The PP teeth did not show any structural changes which could account for the severity of the periodontal lesions.

Adolescent↗
PubMed2006

The behaviour of the periodontal ligament is influencing the use of new treatment tools.

Orthodontic treatment can cause resorptions on teeth. Factors causing resorptions are forces and moments. Other factors that cause resorptions are less influenced by an orthodontic treatment. By carrying out experiments and finite element calculations, it was possible to demonstrate that forces and moments will produce stress in certain parts of the periodontal ligament and the root. This stress reaches or exceeds the blood pressure in some areas. To avoid high pressure in those areas, new treatment devices were constructed consisting of NiTi wires or a combination of NiTi and stainless steel. In the levelling phase, the acting forces remained below 0.5 N using NiTi wire with a diameter of 0.012' (using elastic ligatures). With a NiTi stainless steel spring molars can be uprighted. The orthodontist can easily choose between an intrusive force, a very low intrusive force and an extrusive force. Because of the use of NiTi elements, there was acting an almost constant moment.

Animals↗

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