I case study _ veneers Fig. 10 Fig. 11 Fig. 12 Fig. 10_Veneers on the model. Fig. 11_Bleaching. Figs. 12 & 13a–d_New harmonised incisal guidance. In such patients, the aim of the contouring should be the removal of all uneven surfaces that could cause dysfunction of mandible protrusions and retrusions. This must be done prior to the initial veneer preparation. All possible movements of the mandible in the palatal surfaces of the maxilla and beyond the incisal edge have to be marked accurately. Patients with extreme overbite and crowded anterior teeth are especially exposed to veneer Owing to the clear overbite of 3 mm, the first step was to shorten the maxillary teeth sufficiently. This creates significantly less static leverage forces in the veneer, which is thus subsequently shorter, than in veneers with normal or greater length. Thus, even in habitual dysfunctions, a better force distribution can result within the veneer. In order to achieve an optimal aesthetic result, crown elongation was performed during Figs. 14_Post-op situation from multiple angles. Fig. 14 fractures. In such cases, orthodontic pre-treatment is often essential but refused by many patients. Should this be the case, all edges must be smoothened and rounded so that the veneers created subsequently have a chance of survival. Thorough functional analysis and subsequent documentation were performed. The waxup demonstrated that for the removal of the old vestibular composite reconstructions and for optimal veneer construction, this case required preparation in order to achieve an aesthetic result. The main concern in this case was to identify which basic static design possibilities were achievable. preparation using ELEXXION’s diode laser system. On the one hand, length disparities between the individual teeth can be balanced and on the other hand, a general lengthening of the clinical crowns of all the anterior teeth can be achieved to create a harmonious smile. These measures can always be carried out safely when a sufficient amount of attached gingival exists and an excision with subsequent relocation of the preparation edge does not lead to insufficient biological width. In this case, a prominent mesio-proximal defect of the cervical aspect of tooth 11 led to a significant length disharmony of tooth 21. The teeth appeared to be of the same length after laser cor- 16 I cosmetic dentistry 4_ 2009