Three-dimensional analysis of pulp chambers in maxillary second deciduous molars

Abstract

Objective. The purpose of this study was to clarify the positional relationship between the crown contour and the pulp chamber using micro-CT system for restorations of maxillary second deciduous molar.Methods. Five maxillary second deciduous molar teeth each from the deciduous dentition and the mixed dentition periods were used. The positional relationship between the crown contour and pulp cha mber was 3-dimensionally observed by micro-CT. In addition, the thickness of the dentin at each of the pulp horns and the volume ratio of the pulp chamber against the whole crown were measured.Results. In relationship to the crown contour and the pulp cha mber, the pulp horn of the mesiobuccal cusp showed greatest protrusion and eminent swelling of its mesial wall in both the deciduous dentition and the mixed dentition periods. Furthermore, the pulp chamber was shifted to the mesial side. The volume ratio of the pulp chamber to the whole crown, the ratio in the mixed dentition period showed to be significantly smaller than in the deciduous dentition period. The dentin thickness at the mesiobuccal pulp horn was the thinest.Conclusions. These results suggest that in preparation of cavities in maxillary second deciduous molars, care is necessary not to expose of the mesiobuccal pulp horn.Especially, the mesial wall of the mesiobuccal pulp horn should be noted.3

Prospective in (Primate) Dental Analysis through Tooth 3D Topographical Quantification

“…enamel occlusal surface, enamel-dentine junction surface) (e.g. [9]–[10], [12], [29], [54]). Our molars sample consisting in two gibbons ( Hylobates sp ), four gorillas ( Gorilla gorilla ), three chimpanzees ( Pan troglodytes ), five modern humans ( Homo sapiens ) and six cercopithecoids (two Cercocebus sp., two Cercopithecus sp .…”

“…Not only researchers are able to consider an extensive set of dental features in their analyses including crown enamel and enamel-dentine junction, roots and pulp canals (see e.g. [29]–[32]), but also they are able to consider these tissues in their comprehensive tridimensional aspects.…”

Marginal leakage of two newer glass-ionomer-based sealant materials assessed using micro-CT

“…The micro-CT has also been used for evaluating mechanically stressed dentine-adhesive-composite interfaces, 14 for pulp cavities 15 and root canal geometry, 16 for instrumentation of root canals, 17 in cariology 18 for determining polymerization shrinkage in vitro 19 and for assessing marginal leakage at the restoration-tooth tissue interface in primary teeth in vivo. 20 Compared to traditional ground section methods, micro-CT has advantages that no information is lost through slicing and almost the entire margin is made visible for inspection without destroying the samples.…”

Morphologic Classification of Root Canals and Incidence of Accessory Canals in Maxillary First Molar Palatal Roots: Three-Dimensional Observation and Measurements using Micro-CT

“…At the same time, because it is difficult to detect microstructures, particularly in apical areas, using conventional techniques, it is believed that there could still be anatomical features that affect the precision of root canal treatment. In recent years, however, with the availability of micro-CT, which features high resolution imaging, three-dimensional observation and measurement of microstructures in hard tissue are being carried out much more Root apex frequently 17,18) . Analysis using micro-CT is nondestructive, and, unlike earlier classic techniques, makes it possible to reliably 100 kV, tube current: 75 μA, magnification: ´10, slice thickness: 50 μm.…”