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Introduction. Interdental contacts are an important factor to keep dento-alveolar system healthy.
Its basic functions are protecting the underneath papilla and periodontal structures, prevention of
carries and dispersal of masticatory forces. Studies show that distribution of dental caries is
unequal, approximal surfaces being affected in up to 77%. Approximal caries may be difficult to
diagnose and treat, even for an experienced dentist due to its hidden location. Diagnosing
requires use of other methods than visual-tactile examination, such as: bitewing radiographs,
fiberoptic-transilumination or fluorescent system like Saprolife. It is impossible to restore
approximal surfaces with tight interdental contacts without using specially designed systems,
like Palodent or Bioclear Biofit. This leads to an increased treatment time, especially when
multiple teeth are affected.
Aim of study. To study the possibility of decreasing time necessary for restoring interdental
contacts, using new materials and methods, preventing further complications.
Material and methods. In this study, 6 teeth (4 molars and 2 premolars) with approximal caries
were divided into 2 groups. One group, consisting of 2 molars and 1 premolar, was treated with
dental composite of low viscosity (Tetric N-ceram, Ivoclar) using “layered” technique. Another
group was treated with bulk-fill composite of high viscosity (SDR, Dentsply) using “injection
molding” technique. Total treatment time and approximal wall restoring was measured for every
tooth of both groups. Post-op radiographs were taken.
Results. Due to increased polymerization depth of SDR composite (4 mm), fewer steps are
required for core build up. As a result, total treatment time decreased on average by 4 minutes 50
seconds, along with wall restoring time decrease on average by 7 minutes 15 seconds, using
“injection molding” technique. Post-op radiographs showed the presence of bubble in 1 tooth,
restored by “layered” technique.
Conclusion. The “injection molding” technique requires fewer steps, less time, and reduces the
possibility of further complication such as bubbles. |
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