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Roots Digest 3

From: kendo To: ROOTS Sent: Sunday, July 05, 2009 6:17 PM To: ROOTS Subject: [roots] Uh oh........the smell of napalm Part III I'd ask that folks review the material sent............the objective is to make a difference.......... It demonstrates what I've urged forever; messages left in cyberspace serve no purpose............to repackage and create a brand that is identified with the contributions of a cybercommunity or a postdoctoral endo program, ergo www.rxdentistry.com/barnett which I am giving up on at least in terms of being a pest............. it seems simply just plain wrong to stay limited in scope on the Internet. It's the most positive viral force on the planet re; informatics....... .....once we appreciate that material of whatever nature, from whatever source is always going to make the rounds if it has value, we appreciate that content is king and endless if we are clever and not inwardly focused...........PAY IT FORWARD was a lousy movie, but a brilliant concept..............it does work......... So take a read.........rip it to shreds, but consider doing what Enrique, Gustavo and so many others do, EDUCATE........ PARTICIPATE and COLLABORATE. ........Kendo Continued from Page 2
Fig 13 While there is no meta-analysis to elucidate this concern, the incidence of fracture of the mesial root of mandibular molars has been shown to have a significant correlation to cuspal fracturing..
Fig 14a The working length has two reference points, coronal and apical. Failure to maintain patency at the minor apical diameter will cause loss of the apical reference point as a result of blockage, or ellipticization of the foramen.
Fig 14b The volume of irrigant necessary to prevent apical blockage is indeterminant. While NiTi rotary instrumentation has minimized this procedural problem to a significant degree, nonetheless, a slurry of dentin mud is always a risk factor to be monitored.
Fig 15 Rheology is a science that addresses the deformation and flow of matter. The biochemistry of filling material, its viscosity gradient, the lubricating effect of sealer and optimal thermal application are only as effective as the flow characteristics of the shape created and its degree of cleanliness.
Fig 16a - The ProTaper Universal System comprises two shaping files that address the planes of geometry of the coronal and middle thirds of the root canal space. There are five finishing files that include tips sizes, 20, 25, 30, 40 and 50. Tapers range from .06 to .09 through the series. A thorough understanding of the metrics is essential for the preparation of the myriad variations in internal micro-morphology of the root canal space and the assurance of minimal iatrogenic impact.
Fig 16b Modification of taper in last mm of the apical terminus, exaggerates the constriction or minor apical diameter. Thermo-labile vertical condensation has been shown to enhance successful endodontic outcomes. The matrix effect of the apical control zone enhances the gravitometric density of the required hermetic apical seal as well as enabling more material to flow into the region to occlude fins, cul-de-sacs, deltas and lateral arborizations.
Contd....Page 1

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