Introduction. In numerous clinical situations it is not possible to have an exact clinical evaluation of the furcation
defects. Recently the use of CBCT in periodontology has led to an increased precision in diagnostic.
Aim. To determine the accuracy of CBCT as diagnostic tool of the furcation defects.
Material and method. 19 patients with generalised advanced chronic periodontitis were included in this study,
presenting a total of 25 lower molars with different degrees of furcation defects. Clinical and digital measurements (in
mm) were performed on all the molars involved. The data obtained has been compared and statistically analysed.
Results. The analysis of primary data has demonstrated that all the furcation grade II and III defects were revealed using
the CBCT technique. Regarding the incipient defects (grade I Hamp < 3mm), the dimensions measured on CBCT images
were slightly bigger. The results have shown that 84% of the defects detected by CBCT have been confirmed by clinical
measurements. These data are similar to those revealed by other studies1.
Conclusions. The use of CBCT technique in evaluation and diagnosis of human mandibular furcation defects can
provide many important information regarding the size and aspect of the interradicular defect, efficiently and noninvasively.
CBCT technique is used more effectively in detection of advanced furcation degree compared to incipient
ones. However, the CBCT examination cannot replace, at least in this stage of development, the clinical measurements,
especially the intraoperative ones, which are considered to represent the „golden standard” in this domain.
Holographic evaluations count among recent measurement tools in orthodontics and prosthodontics. This research introduces holography as an assessment method of 3D variations of gingival retractions. The retraction of gingiva on frontal regions of 5 patients with periodontitis was measured in six points and was evaluated by holographic methods using a He-Ne laser device (1mV, Superlum, Carrigtwohill, Ireland) inside a holographic bank of 200 x 100cm. Impressions were taken during first visit and cast models were manufactured. Six months after the end of periodontal treatment, clinical measurements were repeated and the hologram of the first model was superimposed on a final model cast, by using reference points, while maintaining the optical geometric perimeters. The retractions were evaluated 3D in every point using a dedicated software (Sigma Scan Pro,Systat Software, SanJose, CA, USA). The Wilcoxon test was used to compare the mean recession changes between baseline and six months after treatment, and between values in vivo and the values on hologram. No statistically significant differences between values in vivo and on the hologram were found. In conclusion, holography provides a valuable tool for assessing gingival retractions on virtual models. The data can be stored, reproduced, transmitted and compared at a later time point with accuracy.
White spot lesions are an early evidence of the demineralization of the enamel surface and are the first step of future
caries that will develop on those spots. Recently, a new and innovative biotechnology was developed – Icon, a caries
infiltrant to be introduced in early tooth lesions, able to achieve a very good preservation of dental structures. In order to
assess the infiltrant penetration level inside the white spot lesions, a non-destructive 3D visualization method is needed.
Phase-contrast micro computed tomography using synchrotron radiation proved to be a powerful technique, allowing a
3D morphological investigation of all the components of interest: tooth structure, white spot lesions extension, infiltrant
penetration inside the lesions, without the need of slicing the specimens. From our clinical experience and the conducted
research we can conclude that this technology is effective and useful in many clinical situations encountered in pediatric