Study of Pulp Chamber Morphology of Primary Mandibular Molars using Spiral Computed Tomography

Abstract

Aim: The purpose of this study was to evaluate the pulp chamber morphology in primary mandibular molars using spiral computed tomography (SCT). Materials and methods:Sixty extracted primary mandibular molars were scanned using SCT for the (i) distance between the central fissure to furcation, (ii) distance between the central fissure to the floor of the pulp chamber, (iii) height of the pulp chamber (roof-floor), (iv) distance between the floor of the pulp chamber to the furcation. The mean and standard deviation was analyzed using statistical package for the social sciences (SPSS) program. Results:The results of this study show that the average mean distance from the central fissure to the floor of the pulp chamber is 5.07 mm in first mandibular primary molar and 5.54 mm in second mandibular primary molar. Conclusion:It can be concluded that the greatest depth to which a bur can go during access opening without perforating the furcation in first primary mandibular molar is 5.07 mm and 5.54 mm in second primary mandibular molar.

Three-Dimensional Analysis of the Pulp Chamber and Coronal Tooth of Primary Molars: An In Vitro Study

“…Nevertheless, for the analysis of biological effects, this methodological feature is irrelevant to determining the anatomical dimensions of a primary tooth; moreover, radiation in paediatric patients should be restricted to extremely necessary cases. However, the “in vitro” methodology is more rigorous in anatomical studies, such as this and other studies [ 1 , 2 , 3 , 4 , 5 , 6 , 9 , 11 , 12 , 13 , 16 , 27 , 34 , 35 , 36 ], by allowing the fixation of the teeth during handling.…”

“…This fact becomes more important in a primary tooth, as it presents a lower thickness of enamel and dentine tissues [ 4 ]. Making a correct access cavity in pulp therapy allows for the removal of all tissues housed in the chamber and correct visualisation of both the pulp floor and the entrance to the root canals, thus improving the long-term prognosis [ 5 , 6 , 7 , 8 , 9 ]. Furthermore, knowledge of the morphological characteristics of the chamber pulp floor prevents possible iatrogenesis during the technique.…”

“…At present, the researchers focus on advanced imaging techniques, such as cone beam computed tomography (CBCT) [ 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ], micro computed tomography (micro CT) [ 1 , 2 , 3 , 4 , 5 , 19 , 24 , 25 , 26 , 27 ], and spiral computed tomography (SCT) [ 9 ]. A three-dimensional reconstruction is possible, reflecting greater accuracy of the most relevant anatomical features of the pulp chamber, thus being able to explain the successes and failures of different restorative or pulp therapies.…”

Morphological measurements of anatomical landmarks in human maxillary first molar pulp chambers and evaluation of number of pulp canal orifices using spiral computed tomography: An in vitro study

“…There are varied means that have been utilized to analyze and evaluate the pulp space, namely two-dimensional (2D) radiographs and sliced specimens. [13] However, the radiographs fail to reconstruct a 2D figure into a 3D object and cause anatomic noise and geometric distortion. [14] Smith states that in certain cases, a good-quality radiograph sometimes gives a vague estimation about the dimensions of pulp space.…”

Flowable Bulk-Fill Materials Compared to Nano Ceramic Composites for Class I Cavities Restorations in Primary Molars: A Two-Year Prospective Case-Control Study

“…The distance between the cusp tip to pulp chamber ceiling, measured with a graduated probe, as exemplified in Figure 1 ranged from 4 to 5 mm [13,22], while the thickness of 4 mm was indicated by the manufacturer as recommended for bulk-fill RBC materials application with one layer, and was proven to be cured "effectively" [23]. Thus, the cavity size of maximum 4 mm in depth and 3 mm in width was set as the limit to include in the study to avoid perforating the pulp chamber and to comply with the manufacturer's requirements [15,[22][23][24][25]. Cavities were prepared with turbine burs (NTI-Kahla GmbH Rotary Dental Instruments, Kahla, Germany) under water-cooling.…”