DentaltownUK August 2017 - 13
Notes on nickel titanium
The evolution of nickel titanium (NiTi)
instrumentation manufacture has persisted
with a round core blank, whether it was
ground, twisted, nano-coated, heated or
metallurgically reformulated. NiTi files are
superelastic and able to self-center, avoid
apical ellipticization and, with appropriate
taper selection, prevent thinning of the
coronal and middle thirds of the root.
Thinning otherwise results in weakening or
strip perforation.
NiTi f iles, however, are unable to
effectively cleanse most of the intracanal
Fig. 1b. The root canal space is an arborizational,
anastomotic, labyrinthine complexity,
morphologically comparable to the pathways of a
maze. While primary canals exist, the tributaries,
accessory branches and lumina of the dentinal
tubuli harbor extensive tissue and microflora.
The existence of these vast passages has been
demonstrated throughout the past century,
beginning with the work of Hess, and continues
to this day with the use of microcomputed
tomography. (Image courtesy of Versiani, Pécora,
Sousa Nato.)
Fig. 2. The axial view of the obturation
(microstructural replication) demonstrates the
flaw in flat field film interpretation. Significant
areas of the buccolingual dimensions of the
root canal space remain uncleaned despite the
illusory appearance in the radiograph.
space. Moreover, regardless of variable tip
or variable taper or multiple tapers on a
single file design configuration, they are
unable to adequately cleanse the isthmus
confluence of many canals.6 A new design
in file configuration, the SAF system, was
introduced to correct this deficiency by
expanding in one direction when compressed
in the other and by including a virtual core
(Fig. 4).
SAF showed significant promise in terms
of the degree of debris removal in complicated
intracanal anatomy such as the isthmus, when
compared to a competing system. However,
Fig. 3. Dr Herbert B. Schilder's principles included
a continuously tapering shape, maintenance
of the original anatomy, an apex as small as
practical, and conservation of tooth structure. A
continuously tapering space was acquired using
precurved hand instruments, which imposed
discontinuous contact with the canal walls and
created an 'envelope of motion'. Transactionally,
Schilder created a virtual core.
Fig 4. The ideal file would produce an apical size that
three-dimensionally cleaned the minor apical foramen. The SAF from
RedentNova is a hollow file designed as an elastically compressible,
thin-walled pointed cylinder that is composed of a nickel titanium
lattice. Its hollow shape allows for the continuous flow of irrigant
through its lumen. It was a beginning in the paradigm shift toward
minimally invasive 3-D debridement and disinfection.
dentaltownuk.com \\ AUGUST 2017
13
http://www.dentaltownuk.com
Table of Contents for the Digital Edition of DentaltownUK August 2017
Cover
On Dentaltown.com
Editorial with Mike Gow
Meet the Team
Howard Speaks: Drive-Thrus and Dentistry
Endodontic Reboot: Part One
Classified Listings
Brand Advertising
A United Voice
Adhesion in Primary Dentition Restorative Dentistry
Additive Dentistry
Zero Moment of Truth
Through the Keyhole
Message Boards: Re-treats question
Due Diligence—A Vendor's Perspective
Message Boards: Antibiotics after Surgical Extraction
Adding Value to the Patient Experience
Lifestyle
Poll: General Dentistry
CE Update
Students Section
Wishlist
DentaltownUK August 2017 - Cover
DentaltownUK August 2017 - Cover2
DentaltownUK August 2017 - 3
DentaltownUK August 2017 - 4
DentaltownUK August 2017 - On Dentaltown.com
DentaltownUK August 2017 - Editorial with Mike Gow
DentaltownUK August 2017 - 7
DentaltownUK August 2017 - Meet the Team
DentaltownUK August 2017 - 9
DentaltownUK August 2017 - Howard Speaks: Drive-Thrus and Dentistry
DentaltownUK August 2017 - 11
DentaltownUK August 2017 - Endodontic Reboot: Part One
DentaltownUK August 2017 - 13
DentaltownUK August 2017 - 14
DentaltownUK August 2017 - Classified Listings
DentaltownUK August 2017 - 16
DentaltownUK August 2017 - 17
DentaltownUK August 2017 - 18
DentaltownUK August 2017 - 19
DentaltownUK August 2017 - 20
DentaltownUK August 2017 - 21
DentaltownUK August 2017 - 22
DentaltownUK August 2017 - Brand Advertising
DentaltownUK August 2017 - 24
DentaltownUK August 2017 - A United Voice
DentaltownUK August 2017 - Adhesion in Primary Dentition Restorative Dentistry
DentaltownUK August 2017 - 27
DentaltownUK August 2017 - 28
DentaltownUK August 2017 - 29
DentaltownUK August 2017 - 30
DentaltownUK August 2017 - 31
DentaltownUK August 2017 - Additive Dentistry
DentaltownUK August 2017 - 33
DentaltownUK August 2017 - Zero Moment of Truth
DentaltownUK August 2017 - 35
DentaltownUK August 2017 - 36
DentaltownUK August 2017 - Through the Keyhole
DentaltownUK August 2017 - 38
DentaltownUK August 2017 - 39
DentaltownUK August 2017 - 40
DentaltownUK August 2017 - 41
DentaltownUK August 2017 - Message Boards: Re-treats question
DentaltownUK August 2017 - 43
DentaltownUK August 2017 - 44
DentaltownUK August 2017 - 45
DentaltownUK August 2017 - 46
DentaltownUK August 2017 - 47
DentaltownUK August 2017 - 48
DentaltownUK August 2017 - 49
DentaltownUK August 2017 - 50
DentaltownUK August 2017 - 51
DentaltownUK August 2017 - Due Diligence—A Vendor's Perspective
DentaltownUK August 2017 - 53
DentaltownUK August 2017 - 54
DentaltownUK August 2017 - 55
DentaltownUK August 2017 - Message Boards: Antibiotics after Surgical Extraction
DentaltownUK August 2017 - 57
DentaltownUK August 2017 - 58
DentaltownUK August 2017 - 59
DentaltownUK August 2017 - Adding Value to the Patient Experience
DentaltownUK August 2017 - 61
DentaltownUK August 2017 - Lifestyle
DentaltownUK August 2017 - 63
DentaltownUK August 2017 - 64
DentaltownUK August 2017 - 65
DentaltownUK August 2017 - 66
DentaltownUK August 2017 - 67
DentaltownUK August 2017 - 68
DentaltownUK August 2017 - 69
DentaltownUK August 2017 - 70
DentaltownUK August 2017 - 71
DentaltownUK August 2017 - 72
DentaltownUK August 2017 - 73
DentaltownUK August 2017 - Poll: General Dentistry
DentaltownUK August 2017 - 75
DentaltownUK August 2017 - CE Update
DentaltownUK August 2017 - 77
DentaltownUK August 2017 - Students Section
DentaltownUK August 2017 - 79
DentaltownUK August 2017 - 80
DentaltownUK August 2017 - 81
DentaltownUK August 2017 - 82
DentaltownUK August 2017 - 83
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DentaltownUK August 2017 - 87
DentaltownUK August 2017 - Cover4
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