Aim The purpose of this article is to report on the five-year follow-up of a case involving treatment of gingival recession with a subepithelial connective tissue graft prior to orthodontic tooth movement. Background Gingival recession has a global prevalence that varies from 3 to 100 perpcent depending on the population studied and the method of analysis. In addition, the frequency of recession seems to be positively correlated with age. Planned orthodontic tooth movement is not necessarily an etiological factor for gingival recession, so long as it does not move the tooth out of its alveolar process. When the tooth is shifted without adequate biomechanical control, bone dehiscence can develop, and the recession can occur as a consequence of the orthodontic treatment. Case Description A 19.6-year-old female patient was referred for orthodontic treatment due to severe anterior-inferior dental crowding and a mandibular right lateral incisor in linguoverson and 4.0 mm of gingival recession on the labial surface. Normal gingival architecture was restored with a subepithelial connective tissue graft used to cover the 4.0 mm defect, after which orthodontic treatment repositioned the malposed incisor into its correct occlusal alignment. Individualized torque was applied to the mandibular right central incisor during the orthodontic treatment. The patient was reevaluated five years after completion of the orthodontic treatment. Results At the five-year recall appointment, the patient exhibited normal tooth alignment and generalized normal gingival architecture; however, 2 mm of gingival recession was noted on the graft site. Summary This case demonstrated that periodontal surgical correction of facial gingival recession with a subepithelial graft may be performed prior to initiating orthodontic treatment. Clinical Significance The interdisciplinary association between orthodontics and periodontics contributes to good prognosis and acquisition or maintenance of the periodontal tissue health, masticatory function, esthetics, and patient satisfaction. The subepithelial connective tissue graft placed prior to the orthodontic movement showed satisfactory results five years after completion of the orthodontic treatment. Citation Tanaka OM, Avila ALR, Silva GM, Añez MCG, Taffarel IP. The Effects of Orthodontic Movement on a Subepithelial Connective Tissue Graft in the Treatment of Gingival Recession. J Contemp Dent Pract [Internet]. 2010 December; 11(6):073-079. Available from: http://www.thejcdp. com/journal/view/volume11-issue6-tanaka
Objective:The purpose of this study was to validate finite element (FE) method as a reliable adhesive shear strength test method by investigating and comparing the results from in vitro mechanical tests and 3-D FE simulations. Materials and Methods: Four groups of teeth (n=15) using Transbond XT (3M Unitek, Monrovia, CA) and Enlight Ormco (Glendora, CA) with metallic and ceramic brackets (Twin-Edge and InVu, TP Orthodontics, Inc., La Porte, IN) were obtained and submitted to shear bond strength tests. Subsequently, an equivalent geometric model was subjected to FE modeling analysis. ANOVA tests indicated a statistically significant difference (P<0.05) between the shear bond strength of the two bracket types regardless of the resin, and there was no interaction between the resin and bracket type. Results: FE analysis showed the stress distribution in the adhesive layer and revealed an increased stress distribution in the ceramic brackets. These results were consistent with in vitro detachment experiments. Conclusions: This study establishes that FE sub-modeling can be used to simulate adhesive resistance.
This case report illustrates the management of four impacted canines in an adult patient associated with prolonged retention of the four deciduous teeth. The treatment plan was formulated to extract the lower deciduous teeth, application of the forced eruption with the permanent canines, and extract the upper permanent canines and maintenance of the maxillary deciduous canines. No reshaping of the maxillary deciduous teeth was performed because the patient was satisfied with the results.
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