@Article{Wiench2017,
journal="Journal of Stomatology",
issn="0011-4553",
volume="70",
number="6",
year="2017",
title="Evaluation of the efficacy of Guided Tissue
Regeneration in deep bone defects of single-rooted teeth
classified as “hopeless”",
abstract="Objectives: Evaluation of the efficacy of GTR in deep bone defects with single-root teeth classified as hopeless.  Material and Methods: The study involved 16 patients (18 hopeless teeth). Before treatment, after 6 and 12 months clinical attachment level (CAL), probing depth (PD), as well as depth of bone loss as a percentage of root height were evaluated. GTR procedures were performed using bone substitute material and resorbable barrier membranes. Result: Three patients required a tooth extraction within one year of the procedure. In the remaining patients, mean value of CAL parameter decreased from 14.1 mm to 8.4 mm (p <0.05), PD from 12.5 mm to 4.2 mm one year after the treatment (p <0.05). Before the treatment, bone defect was 93% (73% - 121%) of root length on average. After the treatment, the same parameter equaled 57% (27% -78%) (p <0.05). In four patients (4/13), bone loss was reduced to less than 50% (27% -47%) in the X-ray, while in the remaining patients (9/13) bone loss was still above 50% (58% -78%) one year after the treatment. Conclusion: GBR is an effective treatment for even very deep vertical bone defects with single-root teeth, which can change the initial evaluation of the „hopeless” tooth prognosis.     ",
author="Wiench, Rafał
and Gilowski, Łukasz 
and Kulczycka, Justyna 
and Domka, Wojciech
and Jabłoński, Przemysław ",
pages="661--674",
doi="10.5604/01.3001.0010.8465",
url="http://dx.doi.org/10.5604/01.3001.0010.8465"
}