TY - JOUR
T1 - RapidNAM
T2 - Generative manufacturing approach of nasoalveolar molding devices for presurgical cleft lip and palate treatment
AU - Bauer, Franz Xaver
AU - Schönberger, Markus
AU - Gattinger, Johannes
AU - Eblenkamp, Markus
AU - Wintermantel, Erich
AU - Rau, Andrea
AU - Güll, Florian Dieter
AU - Wolff, Klaus Dietrich
AU - Loeffelbein, Denys J.
N1 - Publisher Copyright:
© 2017 Walter de Gruyter GmbH, Berlin/Boston.
PY - 2017/8/28
Y1 - 2017/8/28
N2 - Nasoalveolar molding (NAM) is an accepted treatment strategy in presurgical cleft therapy. The major drawbacks of the treatment listed in the literature relate to the time of the treatment and the coordination of the required interdisciplinary team of therapists, parents, and patients. To overcome these limitations, we present the automated RapidNAM concept that facilitates the design and manufacturing process of NAM devices, and that allows the virtual modification and subsequent manufacture of the devices in advance, with a growth prediction factor adapted to the patient's natural growth. The RapidNAM concept involves (i) the prediction of three trajectories that envelope the fragmented alveolar segments with the goal to mimic a harmonic arch, (ii) the extrusion from the larger toward the smaller alveolar segment along the envelope curves toward the harmonic upper alveolar arch, and (iii) the generation of the NAM device with a ventilation hole, fixation pin, and fixation points for the nasal stents. A feasibility study for a vector-based approach was successfully conducted for unilateral and bilateral cleft lip and palate (CLP) patients. A comparison of the modified target models with the reference target models showed similar results. For further improvement, the number of landmarks used to modify the models was increased by a curve-based approach.
AB - Nasoalveolar molding (NAM) is an accepted treatment strategy in presurgical cleft therapy. The major drawbacks of the treatment listed in the literature relate to the time of the treatment and the coordination of the required interdisciplinary team of therapists, parents, and patients. To overcome these limitations, we present the automated RapidNAM concept that facilitates the design and manufacturing process of NAM devices, and that allows the virtual modification and subsequent manufacture of the devices in advance, with a growth prediction factor adapted to the patient's natural growth. The RapidNAM concept involves (i) the prediction of three trajectories that envelope the fragmented alveolar segments with the goal to mimic a harmonic arch, (ii) the extrusion from the larger toward the smaller alveolar segment along the envelope curves toward the harmonic upper alveolar arch, and (iii) the generation of the NAM device with a ventilation hole, fixation pin, and fixation points for the nasal stents. A feasibility study for a vector-based approach was successfully conducted for unilateral and bilateral cleft lip and palate (CLP) patients. A comparison of the modified target models with the reference target models showed similar results. For further improvement, the number of landmarks used to modify the models was increased by a curve-based approach.
KW - envelope curves
KW - growth prediction factor
KW - nasal stent
KW - nasoalveolar molding
KW - virtual planning
UR - http://www.scopus.com/inward/record.url?scp=85027418132&partnerID=8YFLogxK
U2 - 10.1515/bmt-2016-0035
DO - 10.1515/bmt-2016-0035
M3 - Article
C2 - 28182574
AN - SCOPUS:85027418132
SN - 0013-5585
VL - 62
SP - 407
EP - 414
JO - Biomedizinische Technik
JF - Biomedizinische Technik
IS - 4
ER -