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Ectopic eruption of mandibular first molar is a rare clinical problem. It is one result of an improper balance in the forces of growth and eruption. A case of ectopic eruption of the mandibular first permanent molar is described and the technique for repositioning it is showed.
The effect of the removal of deciduous canines on palatally displaced maxillary canines was assessed and factors contributing to a successful outcome were analysed. Thirty-nine consecutive patients of mean age 11.2 years (standard deviation 1.43), with 47 palatally displaced canines were included in the study. The cases were examined clinically and radiographically for a maximum period of 2 years following deciduous canine removal. Twenty-nine (62 per cent) of the 47 ectopic canines achieved a normal eruptive position and nine (19 per cent) showed some improvement in eruptive position. The outcome of the removal of the deciduous canine depended on the position of the permanent canine. Horizontal overlap of the nearest incisor was found to be the most significant factor. If this exceeded half the tooth width, success was unlikely. The presence of crowding was found to affect adversely the favourable eruption of the canine. Discriminant analysis was carried out to try to identify clinical features which could act as prognostic indicators for the outcome of deciduous canine removal.
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This paper presents information on the ectopic eruption of the maxillary first permanent molar, a local eruption disturbance. Two types can be differentiated: reversible and self-correcting, and an irreversible type, in which the permanent molar remains locked. Many treatment methods have been suggested.
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Management of an ectopically erupting canine is discussed in this case report. Of the various treatment mechanics available to an Orthodontist today, a light elastic thread was used effectively, by the judicious placement of bonded attachments.
This case report describes an unusual phenomenon related to bilaterally displaced canines, where both upper lateral incisors were absent, but where the canines produced extensive root resorption of both upper first premolars, necessitating their removal.
A sectional fixed appliance is described for the alignment of ectopic maxillary canines. This system has a number of advantages over conventionally employed mechanics. These include both good aesthetics and optimal tooth alignment.
Ectopic eruption and impaction of canines is a frequently encountered clinical problem. The incidence of impaction ranges between 1% and 3%. The cause of canine impaction can be the result of localized factor(s) or can be a polygenic multifactorial inheritance and associated with other dental anomalies. There are a number of possible sequelae to canine impactions, ranging from loss of space in the arch to resorption of the roots of the neighboring teeth. Although the management of the ectopically erupting teeth necessitates the combined expertise of a number of clinicians, the orthodontist should have the primary responsibility of coordinating these efforts to provide the patient with the optimal treatment options with the most stable and favorable outcome.
A 7-year-old female patient presented with a rare case of bilateral distal ectopic eruption of the mandibular permanent central incisors. Treatment instituted was extraction of the retained primary teeth and placement of a fixed appliance for alignment and repositioning of the mandibular permanent incisors.
The treatment of a patient with maxillary canine-central incisor transposition is presented. Treatment options were limited because the roots of the maxillary right lateral and central incisors had severe resorption and generalized shortening. The multidisciplinary approach and treatment sequence used to achieve an esthetic and functional result are discussed in this case report.
One case of ectopic mandibular dental impaction is presented. A decision to operate, for by chronic headache, was made. Only computed tomography showed the appropriate surgical approach, which was exobuccal in this case.
This case report demonstrates how extracting a maxillary deciduous canine affects the eruption path of a labially displaced ectopically erupting permanent canine. A long-term follow-up is presented, and the biologic mechanisms are discussed.
PURPOSE: This investigation stemmed from preliminary clinical observations from a school dental clinic, which suggested that a proportion of clinically undetected, radiolucent lesions on radiographs may originate as pre-eruptive intracoronal dentin defects. This study investigated the prevalence of such defects in orthopantomograms from a group of children and young adults. METHODS: A total of 1281 orthopantomograms with 11,767 unerupted permanent teeth were examined. RESULTS: The prevalence of intracoronal dentin defects was 3% by subjects, and 0.5% by teeth; the highest prevalence being noted in the maxillary and mandibular first permanent molars. Most of the lesions occurred singly, and nearly half had extended to greater than two-thirds the width of dentin thickness. Ectopic positioning was significantly associated with this lesion. CONCLUSIONS: Pre-eruptive intracoronal dentin defects occur at a significant prevalence rate. Increased awareness of this entity may improve diagnosis and allow early treatment.
BACKGROUND: Advances in bonding techniques and materials allow for reliable bracket placement on ectopically positioned teeth. This prospective study evaluates the outcome of forced orthodontic eruption of impacted canine teeth in both palatal and labial positions. METHODS: Eighty-two impacted maxillary canines in 54 patients were included in the study and were observed for 18 to 30 months after exposure. Following exposure by means of a palatal flap or an apically repositioned buccal flap, an orthodontic traction hook, with a ligation chain attached, was bonded to each impacted tooth using a light cured orthodontic resin cement. A periodontal dressing was placed over the surgical site for a period of time. RESULTS: All teeth were successfully erupted. Complications consisted of: failure of initial bond, at the time of surgery, which required rebonding; premature debonding at the time of pack removal and; debonding of brackets during orthodontic eruption. There was no infection, eruption failure, ankylosis, resorption or periodontal defect (pocket greater than 3 mm) associated with any of the exposed teeth. Attached gingiva of less than 3 mm was seen in only two of the buccally positioned canines (9%). CONCLUSION: Forced orthodontic eruption of impacted maxillary canines with a well bonded orthodontic traction hook and ligation chain, used in conjunction with a palatal flap or an apically repositioned labial flap, results in predictable orthodontic eruption with few complications.
In the course of orthodontic practice, it is inevitable that one will encounter what is termed here eruptive abnormalities. These abnormalities include teeth that are impacted, ectopically erupting, or transposed. Hyperdontia and hypodontia are also included for consideration. The treatment plans developed to address these anomalies must take into account the space needs of the patient and how one can best gain, maintain, or redistribute that space. Also, soft tissue reactions to the movements also should be considered.
A rarely encountered ectopic and dilacerate maxillary second molar is described. The tooth was found to attached to the medial wall of the maxillary sinus. Its location is thought to be due to ankylosis consequent to injury sustained during infancy.
Much has been written on the aetiology of impacted maxillary canines, but ectopic mandibular canines, being a rarer anomaly, have attracted much less attention. This report describes a case in which the probable aetiology of the displacement of a lower canine was a mandibular fracture through the developing crypt.