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laboratory section 17
DENTAL TECHNOLOGY, APRIL-JUNE 2022

FIG 17 FIG 18 FIG 19

FIG 20 FIG 21 FIG 22

FIG 23 FIG 24 FIG 25
FIG 17-25: Systematic representation of the histo-anatomical topography of lower premolars and molars.

ated increase in automation can be consid-
ered both a blessing and a curse.
Young colleagues should obviously be
encouraged to achieve mastery of comput-
er technology in a self-evident, natural way.
At the same time, it would be equally
regrettable if that legacy knowledge con-
cerning the anatomy and function of natu-
ral teeth increasingly becomes forgotten.
Artistic creativity is a human gift and can-
not be replaced, even by the cleverest of
technologies.
FIG 26: In Mother Nature, the sigmoid curves can also be found on FIG 27: Histo-anatomical insights into the occlusal relation-
the occlusal surface. They form the histo-anatomical dentinal foun- ship in a normal one to two tooth-on-tooth relationship.
dation for the convex, bulge-shaped, shifted functional elements of Here, the functional relevance behind the three-dimensional, For a complete list of references, email:
the occlusal surface which Polz sometimes referred to as histo-anatomical topography of the posterior teeth is clearly info@dental-practice.biz
"Rucksackhöcker” in German or “backpack cusps”. illustrated: The forces are evenly distributed in ways as
repeatedly described in the literature, thereby affording the
tooth extraordinary mechanical resistance and resilience.
About the authors
ARTISTIC CREATIVITY IS A HUMAN GIFT AND CANNOT BE REPLACED, EVEN
BY THE CLEVEREST OF TECHNOLOGIES.
ginal ridges of the enamel needed from a bio- classical knowledge of anatomy, which was
mechanical perspective. Figure 27 provides traditionally obtained and practiced on wax,
histo-anatomical insight into the occlusal rela- has now been extended to encompass a
tionship in a normal one-to-two tooth-on- broader understanding of optics and func-
tooth relationship. The functional relevance tions.
behind the three-dimensional, histo-anatomi- This approach offers the ideal basis for
cal topography of the posterior teeth is clear- manually perfecting models produced by
ly illustrated here. The forces are evenly dis- machines. The GEO Expert Wax by August
Nico Squicciarini was born in Gravina in Puglia, Italy.
tributed in ways as repeatedly described in Bruguera used here is ideally suited for such
From 2005 to 2010, he completed his dental technician
the literature, thereby affording the tooth purposes because it is not only tooth-colored, training at the IPSIA L.Santarella in Bari, Italy. From 2010
extraordinary mechanical resistance and but also translucent. Anyone confronted with to 2015, he worked at a commercial laboratory in
resilience [34] . the histo-anatomical wax-up technique for Gravina in Puglia. Since 2016, he has been employed by
the first time will quickly notice how difficult Dentaltechnik Christ GmbH in Bad Wörishofen, Germany.
The focus of his work lies in morphology and aesthetics.
FINAL CONSIDERATIONS it is to preserve the correct anatomical propor-
What distinguishes his approach is a strong passion and
The histo-anatomical wax-up technique tions and not to be led astray by the translu- love for his profession. It is with that same passion that
described here is a didactic method for all dis- cent properties of the wax [35] . Once this tech- Nico Squicciarini pays it forward by passing his knowl-
ciples of natural tooth morphology. Despite nique has been successfully implemented, the edge onto his colleagues.
the controversial legacy of the gnathological technician has achieved a highly realistic
era, there is no contradiction in terms of tra- impression of the interaction between the dif- Sascha Hein completed his dental technician training
from 1994 to 1997 in Bad Wörishofen. In 2000, he attend-
ditional biomechanical wax-up techniques ferent histo-anatomical structures of the natu-
ed the Kuwata College in Itabashi, Tokyo. Afterwards, he
and their functional principles. Rather, the ral tooth, which impressively evokes the tooth worked for a while in the United Arab Emirates.
histoanatomical wax-up technique incorpo- nature created. Following several stays abroad in Australia, he attended
rates the traditional techniques and develops The authors are committed to preserving the Master School in Freiburg in Breisgau from 2004 to
them further by pairing them with new, scien- the memory of the old Masters and recogniz- 2005 where he graduated with the top score on his
tific evidence about the histo-anatomical ing their accomplishments and contributions. practical test. In 2007, he was inducted into the interna-
tional Oral Design Group by Willi Geller. From 2006 to
topography of natural teeth. The three- Despite all the omnipotent digital changes,
2013, he ran his own dental lab in Perth, Australia. Since
dimensional relationship between the optical- the legacy of Michael Heinz Polz and Dieter 2010, he has also been a member of the international
ly different materials of enamel, DEJ and Schulz is perhaps even that much more Bio-Emulation Group of which he currently shares the
dentin exerts a significant influence on a important today than ever before. Indeed, the position of President with Dr. Javier Tapia Gaudix.
tooth’s shade and optical appearance. Thus, advent of digital technologies and the associ-