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Incidence of nerve damage following third molar removal: a West of Scotland Oral Surgery Research Group study.

A survey was carried out to record both initial and longterm effects on the lingual and inferior alveolar nerves following third molar removal. Eight hundred and twenty five patients were included from eight West of Scotland Oral Surgery Units, and had 1339 third molars removed. Changes in sensation were recorded by direct questioning at 6 to 24 h and 7 to 10 days, and by postal questionnaire at 12-18 months. The incidence of lingual nerve damage was found to be 15% of operated sides at 6 to 24 hours, 10.7% at 7 to 10 days, and 0.6% after 1 year. The incidence of inferior alveolar nerve damage was 5.5% of operated sides at 6 to 24 h, 3.9% at 7 to 10 days, and 0.9% after 1 year. These results are proposed as an indication of the likely incidence of nerve damage complicating third molar removal in the general circumstances of current United Kingdom practice and are presented as a basis for discussion of patient information and current prudent practice. Since one in four patients suffered at least temporary sensory deficit, we believe the case for effective warning of all patients undergoing impacted third molar removal is overwhelming.

Adolescent↗

Early surgical management of cleidocranial dysplasia: a preliminary report.

Cleidocranial dysplasia is an interesting syndrome for the dental practitioner. The failure of eruption of the permanent teeth is secondary to both a mechanical obstruction and a lack of resorption of the overlying bone. Various modes of treatment have been suggested to manage this problem. We feel that early surgical management with serial uncovering of the permanent teeth is the best choice. This treatment will probably need to be combined with orthodontics or prosthetic care, depending on the success of the surgical procedures. In both of our cases the erupting teeth have been malaligned and malrotated, necessitating subsequent use of orthodontic appliances. To our knowledge these patients are among the youngest patients with cleidocranial dysplasia to undergo this treatment. Our preliminary results are encouraging.

Child↗

Morbidity associated with incompletely erupted third molars in the line of mandibular fractures.

A retrospective analysis of 105 mandibular fractures associated with incompletely erupted third molars was undertaken. It was found that there was no difference in the rates of complication if the teeth were retained or extracted, or if an open or closed reduction was performed. The combination of tooth retention with open reduction, however, shows a trend toward being the treatment most prone to postoperative complications.

Fracture Fixation↗

Orthodontic therapy in the patient treated with cyclosporine.

Cyclosporine is an immunosuppressive drug that is gaining widespread use in the treatment of a variety of disorders. Gingival hyperplasia, a common side effect of cyclosporine therapy, has significant implications for orthodontic treatment, especially as the drug becomes more widely used to treat diseases prevalent in adolescents. A 5-year study of a group of patients with type 1 diabetes who were receiving cyclosporine treatment revealed a series of findings that are of importance to the orthodontist, including the potential for orthodontic appliances to increase the severity of the induced gingival enlargement and the potential of the gingival hyperplasia to complicate orthodontic therapy. Guidelines to minimize the degree of cyclosporine-induced gingival enlargement in the orthodontic patient are suggested.

Adolescent↗

Efficiency of a pendulum appliance for molar distalization related to second and third molar eruption stage.

A modified pendulum appliance, including a distal screw and special preactivated pendulum springs (built-in straightening activation and toe-in bending), was used for bilateral maxillary molar distalization in 36 adolescent patients in various stages of the molar dentition. The patients were divided into 3 groups (PG 1-3) according to the stage of eruption of their second and third molars. In PG 1 (18 patients), eruption of the second molars had either not yet taken place or was not complete. In PG 2 (15 patients), the second molars had already developed as far as the occlusal plane, with the third molars at the budding stage. In PG 3 (3 patients), germectomy of the wisdom teeth had been carried out, and the first and second molars on both sides had completely erupted. Analysis of cephalograms to identify any changes in the sagittal plane showed that, in the direction of distalization, a tooth bud acts on the mesial neighboring tooth like a fulcrum, and that tipping of the first molars in patients in whom the second molar was still at the budding stage was thus greater. In patients whose second molars had erupted completely, the degree of tipping was greater again when a third molar bud was located in the direction of movement. After previously completed germectomy of the wisdom teeth, almost exclusively bodily distalization of both molars is possible, even without bands being applied to the second molars. However, if the first and second molars are distalized simultaneously with a pendulum appliance, the duration of therapy will be longer, greater forces will have to be applied, and more anchorage will be lost. Statistical analysis of the results of dental-angular measurements showed significant differences in the degree of molar tipping and reciprocal incisor protrusion. The degree of distal tipping of first molars was less in patients with erupted second molars (PG 2 and PG 3) than in those whose second molars were not yet erupted (PG 1). For instance, the measured angles were 0.9 degrees +/- 3.43 degrees (to the palatal plane) and 0.8 degrees +/- 3.4 degrees (to the anterior cranium floor) in PG 2, and -0.33 degrees +/- 0.58 degrees and 0.67 degrees +/- 2.08 degrees, respectively, in PG 3, contrasting with respective values of 5.89 degrees +/- 3.74 degrees and 5.36 degrees +/- 3.49 degrees in PG 1. Tipping of erupted second molars was much more marked in PG 2 (7.92 degrees +/- 5.83 degrees to the palatal plane and 7.55 degrees +/- 5.28 degrees to the anterior cranium floor), but much less pronounced in PG 3 (2 degrees +/- 1.73 degrees to the palatal plane and 2 degrees +/- 2 degrees to the anterior cranium floor) than the corresponding movement of the second budding-stage molars in PG 1 (4.06 degrees +/- 2.15 degrees and 3.97 degrees +/- 2.27 degrees, respectively). The degree of incisor protrusion occurring reciprocally with molar distalization was much less in these patients (measured angles of 3.28 degrees +/- 1.97 degrees and 2.89 degrees +/- 2.17 degrees to the palatal plane and anterior cranium floor, respectively) than in the patients presenting different stages of the dentition (angles of 5.5 degrees +/- 3.33 degrees and 6.03 degrees +/- 4.29 degrees, respectively, in PG 2, and angles of 5.5 degrees +/- 3.28 degrees and 6.67 degrees +/- 3.09 degrees, respectively, in PG 3). Moreover, measurement of dental casts in the horizontal plane showed not only the targeted mesiobuccal rotation of both maxillary molars, but also a vestibular drift of the unbanded second molars.

Activator Appliances↗

Treatment of ectopic mandibular second molar with titanium miniscrews.

The use of a Cizeta titanium miniscrew (Cizeta Surgical, Bologna, Italy) for treating an impacted mandibular second molar is presented in this report. The surgical procedure for placing the miniscrew and the subsequent orthodontic management are described, including orthodontic traction with a nickel-titanium closed-coil spring exerting 50 g of force. We concluded that the titanium miniscrew for skeletal anchorage is effective in treating deeply impacted mandibular second molars.

Adult↗

Delayed tooth eruption: pathogenesis, diagnosis, and treatment. A literature review.

Delayed tooth eruption (DTE) is the emergence of a tooth into the oral cavity at a time that deviates significantly from norms established for different races, ethnicities, and sexes. This article reviews the local and systemic conditions under which DTE has been reported to occur. The terminology related to disturbances in tooth eruption is also reviewed and clarified. A diagnostic algorithm is proposed to aid the clinician in the diagnosis and treatment planning of DTE. The sequential and timely eruption of teeth is critical to the timing of treatment and the selection of an orthodontic treatment modality. This review addresses the need for a more in-depth understanding of the underlying pathophysiology of DTE and gives the clinician a methodology to approach its diagnosis and treatment.

Chronic Disease↗