Validation of the effectiveness of the Dental Practicality Index in predicting the outcome of root canal retreatments

TY - JOUR

T1 - Validation of the effectiveness of the Dental Practicality Index in predicting the outcome of root canal retreatments

AU - Tifooni, A.

AU - Al-Nuaimi, N.

AU - Dawood, A.

AU - Mannocci, F.

AU - Patel, S.

PY - 2019/10/1

Y1 - 2019/10/1

N2 - Aim: To assess the effectiveness of the Dental Practicality Index (DPI) in predicting the outcome of root canal retreatment in posterior teeth. Methodology: One hundred and thirty-seven posterior teeth with symptoms and/or signs of post-treatment endodontic disease requiring root canal retreatment and previously included in a clinical trial were selected. Clinical and radiographic examinations including digital periapical and cone beam computed tomography (CBCT) were obtained pre-treatment and 1-year postoperatively from a previous study. Two calibrated and trained assessors who were unaware of the treatment outcome assessed the pre-treatment clinical records of these cases using the DPI. The DPI score was then compared to the outcome of the root canal retreatment. A Chi-square/Fisher’s exact test was used to establish a relationship between categorical variables, the total score of DPI vs outcome. Results: Retreated teeth with DPI scores equal to 6 or above had an unfavourable outcome of 50% vs 14% of teeth with DPI below 6. Teeth with DPI score equal to 3 or above had an unfavourable outcome of 23% versus 2%, for teeth below 3. Molar teeth with a DPI score below 3 had a favourable outcome percentage of 96%. Conclusions: This study highlighted that using the DPI gave a good outcome prediction for root canal retreatments. However, further research, including the prospective assessment of a wider range of cases undertaken by a larger group of examiners is needed to further validate the DPI.

AB - Aim: To assess the effectiveness of the Dental Practicality Index (DPI) in predicting the outcome of root canal retreatment in posterior teeth. Methodology: One hundred and thirty-seven posterior teeth with symptoms and/or signs of post-treatment endodontic disease requiring root canal retreatment and previously included in a clinical trial were selected. Clinical and radiographic examinations including digital periapical and cone beam computed tomography (CBCT) were obtained pre-treatment and 1-year postoperatively from a previous study. Two calibrated and trained assessors who were unaware of the treatment outcome assessed the pre-treatment clinical records of these cases using the DPI. The DPI score was then compared to the outcome of the root canal retreatment. A Chi-square/Fisher’s exact test was used to establish a relationship between categorical variables, the total score of DPI vs outcome. Results: Retreated teeth with DPI scores equal to 6 or above had an unfavourable outcome of 50% vs 14% of teeth with DPI below 6. Teeth with DPI score equal to 3 or above had an unfavourable outcome of 23% versus 2%, for teeth below 3. Molar teeth with a DPI score below 3 had a favourable outcome percentage of 96%. Conclusions: This study highlighted that using the DPI gave a good outcome prediction for root canal retreatments. However, further research, including the prospective assessment of a wider range of cases undertaken by a larger group of examiners is needed to further validate the DPI.

KW - Dental Practicality Index

KW - restorative indices

KW - root canal retreatment

KW - tooth restorability

KW - treatment outcome

UR - http://www.scopus.com/inward/record.url?scp=85067511346&partnerID=8YFLogxK

U2 - 10.1111/iej.13142

DO - 10.1111/iej.13142

M3 - Article

AN - SCOPUS:85067511346

SN - 0143-2885

VL - 52

SP - 1403

EP - 1409

JO - International Endodontic Journal

JF - International Endodontic Journal

IS - 10

ER -