Augmentation Techniques – the Basis of Aesthetic

Classification of defects Numerous classification systems for bone defects have been proposed. In our practice, we favour the classification by Ferher and Schärer (1999). Class 0/I situations Classes 0 and I do not constitute a bone deficit. Class 0 indicates that the alveolar ridge is well shaped without showing any kind of defect. Class I refers to situations preceded by atraumatic tooth removal but not involving a bone defect. Agenesis Tooth agenesis has always been a major indication for implant treatment. Tooth loss is commonly asso- ciated with bone defects of varying severity. This is particularly true in the aesthetic zone, coinciding with the anterior segment of the maxilla (Classes 0 and I). At sites of congenitally missing lateral incisors, for example, the horizontal bone dimension is usual- ly inadequate. In this situation, an adequate implant bed can be created by the combined use of bone splitting and spreading (Figures SP1–SP5). A combination of bone spreading and bone split- ting may be sufficient to prepare the alveolar ridge for accepting dental implants. To ensure a successful aesthetic outcome, it is essential that an accurate implant position is secured despite the horizontally reduced bone. EDI Case Studies 3 Fig. SP1 Horizontally reduced bone due to agene- sis of the later- al incisors. Fig. SP2 Bone spread- ing with a flat chisel. Fig. SP3 Bone spread- ing with an osteotome. Fig. SP4 Correct implant posi- tion 1,5 mm away from the adjacent root with slightly palatal angu- lation. Fig. SP5 Treatment outcome.