Abstract
This study investigated changes in residual ridge dimensions after tooth
extraction among thin and thick gingival biotypes. Fifteen patients who
required extraction of maxillary premolars were classified according to
gingival biotypes (10 teeth in 9 participants were included in the
thick group, and 6 teeth in 6 participants were included in the thin
group). Minimally traumatic extractions were carried out using
periotomes and rotational movement of teeth. At the time of extraction
an osteometer was used to measure the thickness of the labial plate and
the bony alveolar ridge at the extraction site by penetrating the
tissues until bone was reached 5 mm, 7 mm, and 10 mm below the midpoint
of the crest of the facial and palatal gingival margins. Standardized
radiographs were taken immediately and after 3 months. The results of
this study show minimal differences in dimensional changes following
extraction of premolar teeth in thick and thin gingival biotypes.
Significantly greater bone loss was detected in both gingival biotypes
when the labial plate thickness was less than 1.5 mm, especially in
alveolar ridge height
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