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At least 415 records · Page 23Linked to original sources
PubMed1982

Mesial migration and lower third molar tilt.

The angulation of lower third molars is compared in two groups of radiographs of children aged 10.1--13.0 years, one group showing lower second deciduous molars present, the other showing mesial migration of lower first permanent molars and impaction of second premolars following early extraction of lower second deciduous molars. The lower third molar crypts are significantly less tilted in the group where deciduous molars had been removed, the difference between the means of the two groups being 12.5 degrees (p less than 0.001). The findings are discussed in relation to the hypothesis that early mesial migration improves the orientation of third molar crypts by enabling them to develop further forward. There is some evidence that the mean angle of tilt may be reduced by about 20 degrees when mesial migration occurs before third molar crypts begin to form.

Adolescent↗
PubMed2003

Pathological migration: an unusual cause of midline diastema.

A 34-year-old female attended the orthodontic department and was concerned with a midline diastema in the lower arch. The diagnosis made was pathological migration owing to the habitual placement of her tongue stud on the incisal edges of her mandibular central incisors, forcing them apart. This article describes the causes of pathological migration, and other possible complications due to oral piercings.

Adult↗
PubMed1987

Migration of teeth in shortened dental arches.

In shortened dental arches (SDA) the remaining premolars tend to migrate distally. This may lead to a decrease of the vertical dimension, resulting in an increased load on the anterior teeth. Consequently the number and intensity of the occlusal contacts between the front teeth increase. This may result in interdental spacing in the upper front region. In this study the pattern of migration of the teeth in subjects with SDA (n = 60) is described. The SDA group is compared with subjects having complete dental arches (n = 72). Although a systemic effect of SDA has been found on interdental spacing for subjects under 40 years of age, it is concluded that this migration is within acceptable levels.

Adult↗
PubMed1994

Transmigration of mandibular canines: a review of the literature and report of two cases.

Transmigration of mandibular canines across the midline is rare. Two 14-year-old female patients from South India were found to exhibit this phenomenon. In one patient, the mandibular right canine had crossed the midline and migrated to the left, up to the mesial root apex of the permanent first molar, near the lower border of the mandible. In the other patient, the permanent mandibular left canine had crossed the midline and migrated up to the root of the mandibular right canine. Both of these patients are being observed regularly for further migration. The literature on this rare condition is reviewed and its etiologic possibilities and treatment modalities are discussed.

Adolescent↗
PubMedDate not supplied

[Spacing correction in adult patients].

Spacing due to periodontal disease with migration of adjacent teeth to extraction space is a common problem in adult patients. Appropriate orthodontic treatment is one of the measures to prevent aggravation of periodontal structure. The objective of the article was to present basic principles of adult orthodontics comprising: establishment of mandibular position, control of tooth movement in three dimensions of space, anchorage preparation, prevention of iatrogenic effects and prevention of relapse along with 2 case reports.

Adult↗
PubMedDate not supplied

Early detection and prevention of mandibular tooth transposition.

Distal migration of the mandibular permanent lateral incisor happens rarely and it can be discovered radiographically in the early mixed dentition. If unattended, the tooth may erupt ectopically, usually distal to its normal anatomical position and occlusal to the developing first premolar, and it can become transposed with the permanent canine. Early detection and immediate interceptive removal of the retained deciduous lateral incisor and canine, followed by uprighting the ectopic lateral incisor to its normal anatomical position in the arch, will intercept the problem and prevent the developing transposition.

Bicuspid↗
PubMed1992

[The correction of fanned-out incisors--an important orthodontic contribution to aesthetic dentistry].

Account has to be taken of the increased aesthetic awareness of the adult patient by all sub-specialties of dentistry. Here, orthodontics often plays the role of a central link between periodontics and prosthetics. Taking pathological migration of the incisors as an example, the pathogenesis, therapeutic procedures and orthodontic possibilities for the restoration of normal dentofacial aesthetics are demonstrated and discussed.

Adult↗
PubMedDate not supplied

Periodontal conditions of teeth presenting pathologic migration.

The aim of the present study was to evaluate the periodontal conditions of anterior teeth that presented pathologic migration in patients with chronic periodontitis and to compare periodontal destruction in migrated versus non-migrated teeth. The sample included 32 patients of both sexes (mean age: 46.0 +/- 11.6 years) diagnosed with generalized chronic periodontitis and selected on the basis of the presence of pathologic migration in one or more anterior teeth. This migration was classified according to the following categories: facial flaring, diastema, proximal tilting, rotation or extrusion. The periodontal parameters recorded were clinical attachment loss (CAL) and percentage of radiographic bone loss (BL). Mean CAL of 5.50 +/- 2.20 mm and mean BL of 41.90 +/- 15.40% were found in 115 teeth assessed. The most frequent type of migration was facial flaring (34.80%), followed by diastema (27.00%). Extrusion was hardly observed in the sample (4.30%). However, greater severity of BL and CAL were observed in teeth with this type of migration (59.44% and 8.42 mm, respectively), and in teeth with facial flaring (45.17% of BL and 6.07 mm of CAL). Kruskal-Wallis test indicated that BL presented by teeth with extrusion or facial flaring was greater than that observed in rotated or tilted teeth (p < 0.05), while there was no difference between groups regarding CAL (p = 0.11). It was observed that anterior teeth with pathologic migration presented greater CAL and BL (5.1 mm and 40%) than non-migrated teeth (4.1 and 31%). The study indicated that the most prevalent kind of pathologic migration is facial flaring, which was associated to higher level of bone loss.

Alveolar Bone Loss↗
PubMed1992

Histological evaluation of the effect of transseptal fibre resection on the rate of physiological migration of rat molar teeth.

Twenty-seven female Sprague-Dawley rats were given lead acetate as a vital stain, and rates of alveolar bone formation, representative of drift, were measured histologically. Teeth around which the transseptal fibre system had been destroyed drifted less quickly on both functioning (p less than 0.01) and non-functioning (p less than 0.001) sides than those with intact transseptal fibres. Both horizontal and vertical components of physiological drift were equally affected by destruction of the transseptal fibre system. It was felt that the transseptal fibres probably exerted their primary effect on the tooth, with bone remodelling around the drifting tooth being affected secondarily.

Animals↗
PubMed1999

Spontaneous repositioning of pathologically migrated teeth.

BACKGROUND: There is limited clinical evidence that pathologically migrated teeth may reposition themselves after conventional periodontal treatment. The current research was carried out to determine the frequency of spontaneous repositioning of pathologically migrated teeth after routine periodontal therapy, and to study the relation between the severity of migration and the degree of repositioning following treatment. METHODS: Sixteen patients with moderate to severe periodontal disease and presenting 33 diastema sites secondary to pathologic migration participated in this study. After conventional periodontal treatment had been performed, reactive repositioning was assessed by measuring the space between pathologically migrated teeth and adjacent teeth on study models obtained at baseline, re-evaluation at 6 weeks after scaling and root planing, and 4 months after surgery. RESULTS: After scaling and root planing only, 48.5% of all sites exhibited some degree of repositioning with 36.4% of all sites closing completely. After surgery (6 months after baseline observations), 69.7% of all sites exhibited some degree of repositioning with 51.5% of all sites closing completely. When only small to moderate diastemata were considered (<1 mm), 77.8% of sites closed completely. CONCLUSIONS: The findings of this study support the hypothesis that spontaneous repositioning after conventional periodontal treatment is likely, particularly when only light to moderate degrees of pathologic migration are considered. We hypothesize that this spontaneous movement is due to wound contraction during healing.

Adult↗
PubMed2005

Interdental papilla augmentation procedure following orthodontic treatment in a periodontal patient.

BACKGROUND: The absence of the interdental papilla is a situation that may alter patients' esthetics. Recession of interproximal gingival tissues may be a consequence of periodontal disease, but in some cases it may also be a consequence of periodontal therapy, as a result of surgical or non-surgical procedures. METHODS: The authors present a new multidisciplinary approach for the treatment of migrated maxillary incisors presenting infrabony defects, extrusion, and loss of the interdental papilla. RESULTS AND CONCLUSION: The proposed clinical protocol may reconstruct the interproximal soft tissue, with esthetic improvement of the papillary level, together with resolution of the periodontal defects.

Gingivoplasty↗
PubMed1989

[Posterior bite collapse. 1. Etiology and diagnosis].

The posterior Bite Collapse is a sequelae of advanced break down. The presence of periodontal inflammation and loss of osseous support can induce teeth migration in a direction partially imposed by occlusal forces. Posterior Bite Collapse often causes mesial drifting of the posterior teeth and flaring of the anterior segments. It may be aggravated by early loss of teeth that are not replaced, by malocclusion or by a neuro muscular disorder.

Bicuspid↗
PubMed1984

"Spontaneous" repositioning of migrated teeth following periodontal surgery.

The paper presents 2 cases of "spontaneous" repositioning of anterior teeth following periodontal surgery. In view of the reported cases, the present approach to orthodontic treatment of periodontal patients is questioned. It is suggested that the subject of "spontaneous" repositioning deserves more attention and that documentation and research are needed to elaborate on the subject in order to establish a sound approach to orthodontic intervention in periodontal cases.

Adult↗
PubMed1990

[Periodontal-orthodontic treatment possibilities for migrated front teeth--case selection and theoretical concept].

Migration of maxillary incisors caused by advanced periodontal disease induces functional, periodontal and esthetical problems to the patient. Under certain conditions a combined periodontal-orthodontal treatment should be considered. A successful treatment result depends on the selection of the patients. The presented concept offers good long-term results for a combined periodontal-orthodontal therapy.

Dental Plaque↗
PubMed1997

[Experimental study on supraeruption of the unopposed miniature pig molars].

Supraeruption of the molars in the absence of antagonist molars or without occlusal contacts was observed in a miniature pig. Tetracycline was used to label the new regenerated cementum and alveolar bone associated with the supraeruption. The results showed that the molar through root canal treatment migrated the same level as the molars with pulp, which means that the hydrodynamic and hydrostatic forces arising from the blood in pulp vessels look doubtful. Cementum and alveolar bone deposition was seen around the apical, cervical regions and under the furcation area. The thickness of the deposition layers was almost the same as the supraerupted volume from the model measurement.

Animals↗
PubMed1989

[Changes in the dental arch due to obligatory early extraction of first permanent molars].

The first permanent molars are the mo frequently extracted teeth due to caries. Early loss of these teeth which are known as "the ke of the occlusion" may lead to rotations, migrations, and elongations of the other teeth in the dental arches, and finally may cause occlusal disorders. This research is conducted on the patient whose first permanent molars need to be extracted due to profound caries and unrestorab material loss. By means of the lateral and panoramic radiographs taken just before the extraction and one year later, the local changes in the extraction and non-extraction segments are compared.

Dental Arch↗
PubMed2002

Pathologic migration--spontaneous correction following periodontal therapy: a case report.

Periodontal disease is often associated with pathologic migration, which becomes an esthetic concern. A 17-year-old girl developed increasing gaps among her maxillary incisors. She had gingival enlargement in the palatal maxillary anterior region. The central incisors had pathologically migrated, resulting in a 2-mm diastema. Periodontal treatment was planned and completed. Following periodontal treatment, there was "spontaneous" repositioning of the central incisors. The 6-month follow-up revealed no change or deterioration of the periodontal condition. The patient was referred for orthodontic closure of the remaining diastema between the central and lateral incisors.

Adolescent↗