Ridge dimensional changes following single-tooth extraction in the aesthetic zone
, . Ridge dimensional changes following single-tooth extraction in the aesthetic zone. Clin. Oral Impl. Res. 00, 2012; 1–6.
Abstract
Objectives
The
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 methods
Twenty
subjects who were to have a single tooth in the aesthetic zone
extracted and replaced by an implant after a 6–8 week healing period
were selected for this study. Hard and soft tissue measurements of the
extraction site were obtained pre-extraction and were repeated 6–8 weeks
post-extraction at defined points using a key.
Results
After
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
4 mm or more of buccal bone in the midpoint of the extraction socket.
Discussion
After
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.
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