Ridge dimensional changes following single-tooth extraction in the aesthetic zone

ObjectivesThe aims of this study were to investigate the magnitude of the dimensional changes following extraction of a single tooth in the aesthetic zone over a 6- to 8-week healing period and to examine the degree and pattern of resorption of the buccal bone plate during this time frame. Materials and methodsTwenty subjects who were to have a single tooth in the aesthetic zone extracted and replaced by an implant after a 6-8week healing period were selected for this study. Hard and soft tissue measurements of the extraction site were obtained pre-extraction and were repeated 6-8weeks post-extraction at defined points using a key. ResultsAfter a 6- to 8-week healing period, the total ridge thickness in the crestal midline reduced by 15% of the original value. The buccal plate resorbed in an inverted V shape. Forty-two percentage of subjects had lost 4mm or more of buccal bone in the midpoint of the extraction socket. DiscussionAfter a 6- to 8-week healing period post-extraction, there were significant reductions in the hard and soft tissue dimensions of the ridge, most notably on the most coronal mid-buccal aspect. All implants placed required simultaneous augmentation as a result.