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Microcomputed tomography assessment of microcracks following temporary filling placement

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Clinical Oral Investigations Aims and scope Submit manuscript

Abstract

Objectives

The aim of this study was to detect microcracks and cuspal deflection in tooth crown following the application of temporary filling using microcomputed tomography (micro-CT).

Materials and methods

A mesio-occluso-distal cavity preparation was performed, followed by endodontic access cavity preparation and root canal shaping. Cavities were classified into two groups according to the type of temporary filling material used; Coltosol F (Coltene Whaledent) (Group I) and intermediate restorative material (IRM; Dentsply Sirona) (Group II). Micro-CT images before and after temporary filling material placement were obtained and then compared for the presence of microcracks. Microcracks considered in our data analysis were the new ones that were detected after temporary filling material placement. The mean number of new microcracks per tooth recorded for both groups were compared using Mann–Whitney U test. The number of teeth with new microcracks in both groups was compared by chi-square test. Repeated measures t test was conducted to observe the effect of temporary filling on the intercuspal distance (ICD). Also, the mean difference in the ICDs detected after temporary filling placement in both groups were compared by independent t test. The significance level was set at 5%.

Results

Eleven microcracks were detected in group I, whereas only three microcracks were observed in group II (p < 0.01). The mean numbers of new microcracks were 0.84 and 0.21 in group I and II, respectively (p < 0.01). There was no significant difference in the ICDs in group I (0.006±0.02 mm) and group II (0.018 ± 0.03 mm) (p > 0.26). Most of the microcracks were found in the dentin structure. The cavity’s box area was more affected by new microcracks, compared with the cavity’s coronal area. The new microcracks were mainly observed in the mesiodistal direction. No complete fractures were reported in our study.

Conclusions

Both temporary fillings induced microcracks; Coltosol F can induce more microcracks than IRM in premolar teeth after 1-week storage. Most of the microcracks were observed in the dentin structure of the cavity’s box area running mesiodistally.

Clinical relevance

The results indicated that the tested temporary fillings developed microcracks on the tooth crown with slight deflection of the cusps.

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Funding

This work was supported by the King Abdullah International Medical Center RC17/189/R.

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Authors and Affiliations

  1. Restorative and Prosthetic Dental Sciences, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, National Guard Health Affairs, P.O. Box 22490, Riyadh, 11426, Kingdom of Saudi Arabia

    Ahmed Jamleh

  2. King Abdullah International Medical Research Centre, National Guard Health Affairs, Riyadh, Kingdom of Saudi Arabia

    Ahmed Jamleh

  3. Faculty of Dentistry, McGill University, Montreal, Quebec, Canada

    Alaa Mansour, Doaa Taqi, Hanan Moussa & Faleh Tamimi

Authors
  1. Ahmed Jamleh
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  2. Alaa Mansour
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  3. Doaa Taqi
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Correspondence to Ahmed Jamleh.

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The study protocol was approved by an Ethical Committee Board.

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Jamleh, A., Mansour, A., Taqi, D. et al. Microcomputed tomography assessment of microcracks following temporary filling placement. Clin Oral Invest 24, 1387–1393 (2020). https://doi.org/10.1007/s00784-019-03093-7

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  • DOI: https://doi.org/10.1007/s00784-019-03093-7

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