Introdouction:
Overhang refers to the extension of restoration
material from the cavity. It has an important role
in decay, plaque accumulation and periodontal
disease, so the aim of this study is determining
the frequency of restoration overhang in
patients in Anzali, Guilan.
Materials and methods:
This descriptive cross-sectional study was
completed using 293 patients who visited
for routine check-ups. The overhangs were
examined on the basis of the cavity type,
restoration type, tooth location, and age by
direct observation using an explorer, dental
floss. After the initial diagnosis of the overhang,
the radiographic reports were examined for final
confirmation.
Results:
41.2%, 0%, 18.2%, and 38.1% were observed
in cavity classes II, III, IV, and V, respectively.
35.8%, 38.2%, 28.1%, and 25% were observed in
mesial, distal, buccal, and lingual regions,
respectively. The highest rate of overhang
frequency in the first molar teeth was 50%
and the lowest overhang amount occurred in
the lateral and canine teeth at 25% and 27.3%,
respectively. Most amalgam restorations had
overhang (37.7%) and the highest amount of
overhang was in the upper jaw (42.5%). The highest
amount of overhang frequency was observed
on the left (41.6%). There was no significant
difference in overhang frequency between men
and women. The lowest and highest amounts
of overhang were observed in the age groups
of <30 (26.9%) and 30–39 (47.8%), respectively,
and was found to be statistically significant.
Conclusion:
The overall frequency of restoration
overhang was 36.6%, most of which was in class II
amalgam restoration in the left first molar teeth
in 30–39 year-olds.