Pitfalls and solutions in virtual design of nasoalveolar molding plates by using CAD/CAM technology - A preliminary clinical study

Lucas M. Ritschl, Andrea Rau, Florian D. Güll, Benjamin Dibora, Klaus Dietrich Wolff, Markus Schönberger, Franz X. Bauer, Erich Wintermantel, Denys J. Loeffelbein

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

Purpose Computer-assisted design and computer-aided manufacturing (CAD/CAM) technology in nasoalveolar molding (NAM) should save time and manpower and reduce family input in cases of cleft lip and palate. Material and methods Intraoral casts from 12 infants with complete unilateral cleft lip and palate were taken immediately after birth (T1) and after (T2) NAM treatment, digitalized, and transformed into STL data. The infants were randomized into Group 1 (n = 6) receiving conventional NAM treatment or Group 2 receiving CAD/CAM NAM (n = 6). We analyzed the following variables by using Geomagic software: intersegmental alveolar distance (ISAD); intersegmental lip distance (ISLD); nostril height cleft/noncleft (NHc/nc); nasal width cleft/noncleft (NWn/nc); and columella deviation angle (CDA). Results In both groups, all variables except NHnc and NWnc were changed significantly between T1 and T2. The analysis of the mean differences of the variables in Group 1 and 2 showed no significant differences, with a comparable incidence of clinical alterations such as skin or mucosal irritations. Conclusion NAM plates can be produced virtually by using CAD/CAM technology. The CAD/CAM NAM results show no significant differences from the conventional technique. We present our clinically usable virtual CAD/CAM workflow for producing a basic NAM plate.

Original languageEnglish
Pages (from-to)453-459
Number of pages7
JournalJournal of Cranio-Maxillofacial Surgery
Volume44
Issue number4
DOIs
StatePublished - 1 Apr 2016

Keywords

  • CAD/CAM
  • Cleft lip and palate
  • Nasoalveolar molding
  • Rapid prototyping
  • Sequential production

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