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Neena, A., Alshimy, A., Khamis, M., Ekram, A. (2020). DIGITAL EVALUATION OF DIMENSIONAL ACCURACY AND INTIMACY OF FIT OF SINGLE-PIECE CLOSED HOLLOW BULB OBTURATORS FABRICATED BY CAD/CAM ADDITIVE MANUFACTURING. Alexandria Dental Journal, 45(1), 68-74. doi: 10.21608/adjalexu.2020.79943
Akram F. Neena; Ahmed M. Alshimy; Mohamed M. Khamis; Amr M. Ekram. "DIGITAL EVALUATION OF DIMENSIONAL ACCURACY AND INTIMACY OF FIT OF SINGLE-PIECE CLOSED HOLLOW BULB OBTURATORS FABRICATED BY CAD/CAM ADDITIVE MANUFACTURING". Alexandria Dental Journal, 45, 1, 2020, 68-74. doi: 10.21608/adjalexu.2020.79943
Neena, A., Alshimy, A., Khamis, M., Ekram, A. (2020). 'DIGITAL EVALUATION OF DIMENSIONAL ACCURACY AND INTIMACY OF FIT OF SINGLE-PIECE CLOSED HOLLOW BULB OBTURATORS FABRICATED BY CAD/CAM ADDITIVE MANUFACTURING', Alexandria Dental Journal, 45(1), pp. 68-74. doi: 10.21608/adjalexu.2020.79943
Neena, A., Alshimy, A., Khamis, M., Ekram, A. DIGITAL EVALUATION OF DIMENSIONAL ACCURACY AND INTIMACY OF FIT OF SINGLE-PIECE CLOSED HOLLOW BULB OBTURATORS FABRICATED BY CAD/CAM ADDITIVE MANUFACTURING. Alexandria Dental Journal, 2020; 45(1): 68-74. doi: 10.21608/adjalexu.2020.79943

DIGITAL EVALUATION OF DIMENSIONAL ACCURACY AND INTIMACY OF FIT OF SINGLE-PIECE CLOSED HOLLOW BULB OBTURATORS FABRICATED BY CAD/CAM ADDITIVE MANUFACTURING

Article 12, Volume 45, Issue 1, April 2020, Page 68-74  XML PDF (731.22 K)
Document Type: Original Article
DOI: 10.21608/adjalexu.2020.79943
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Authors
Akram F. Neena1; Ahmed M. Alshimy2; Mohamed M. Khamis3; Amr M. Ekram4
1Assistant lecturer of Removable Prosthodontics, Faculty of Dentistry, Alexandria University
2Professor and Head of Removable Prosthodontics Department, Faculty of Dentistry, Alexandria University
3Professor of Removable Prosthodontics, Faculty of Dentistry, Alexandria University
4Oral and Maxillofacial Surgery consultant, Faculty of Dentistry, Cairo University
Abstract
Introduction: Conventional techniques for closed hollow bulb obturators construction are technique sensitive, consume considerable amount of materials, and lack adequate control of the walls thickness of the bulb. Additionally, created sealing area is a potential site of leakage and discoloration. Digital technologies offer promising solutions to these drawbacks. Subtractive manufacturing systems are unable to produce hollow objects as one piece. In contrast, additive manufacturing systems can produce a hollow object in one piece.
Objectives: The aim of the present study was to evaluate one-piece closed hollow bulb obturators fabricated using CAD/CAM additive manufacturing and compare them to those constructed from heat cured resin.
Materials and methods: Six partially dentate patients with healed unilateral maxillary defects (Aramany’s classes I or II) received two closed hollow bulb obturators. One constructed using CAD/CAM additive manufacturing, and another constructed from conventional acrylic resin. All patients’ prostheses were evaluated for dimensional accuracy and intimacy of fit using digital measuring software package.
Results:CAD/CAM obturators showed negative dimensional change values when compared to the original design, while Heat-cured obturators showed positive ones. Generally, the highest values of deviations were recorded at occlusal units for CAD/CAM obturators (-0.34 ± 0.10) and Heat-cured obturators (0.21 ± 0.12) when fitting surface was used as reference. There were statistical significant differences in dimensional deviation between both obturator groups using two registration references. CAD/CAM obturators showed lower misfit values when compared to Heat-cured ones. The highest values of misfit were recorded at the oral extensions of the CAD/CAM (0.44 ± 0.27) and Heat-cured obturators (0.47 ± 0.32). However, there were no statistical significant differences between both obturator groups at any measured surface.
Conclusions: Additive manufacturing of obturators could be an alternative to conventional techniques for direct construction of one-piece closed hollow bulb obturators.
Keywords
Digital dimensional accuracy; intimacy of fit; additive manufacturing; closed hollow bulb; single-piece obturators
Main Subjects
Prosthodontics
References
  1. Beumer J, Curtis TA, Marunick MT, editors. Maxillofacial rehabilitation: prosthodontic and surgical considerations, 1st ed. Ishiyaku Euroamerica; 1996.
  2. Shinde B, Jadhav GR, Mittal P. Hollow Bulb Obturator Prosthesis Following Palatal Resection: A Case Report. Glob J Oral Sci. 2016;2:6-9.
  3. Voet VS, Strating T, Schnelting GH, Dijkstra P, Tietema M, Xu J, et al. Biobased Acrylate Photocurable Resin Formulation for Stereolithography 3D Printing. ACS Omega. 2018;3:1403-8.
  4. Oh W, Roumanas ED. Optimization of maxillary obturator thickness using a double-processing technique. J Prosthodont. 2008;17:60-3
  5. McAndrew KS, Rothenberger S, Minsley GE: An innovative investment method for the fabrication of a closed hollow obturator prosthesis. J Prosthet Dent 1998;80:129- 32
  6. Phankosol P, Martin JW. Hollow obturator with removable lid. J Prosthet Dent 1985;54:98-100
  7. Schwartzman B, Caputo AA, Beumer J. Gravity-induced stresses by an obturator prosthesis. J Prosthet Dent 1990;64:466-8
  8. Minsley GE, Nelson DR, Rothenberger SL. An alternative method for fabrication of a closed hollow obturator. J Prosthet Dent 1986;55:466-8
  9. Elshimy AM. Speech evaluation for resected maxilla after insertion of the palatal obturator with various nasal extensions. Doctor Degree thesis. Alexandria University. 1988
  10. Bauermeister AJ, Zuriarrain A, Newman MI. Threedimensional printing in plastic and reconstructive surgery: a systematic review. Ann Plast Surg. 2016;77:569-76.
  11. Michelinakis G. The use of cone beam computed tomography and three dimensional printing technology in the restoration of a maxillectomy patient using a dental implant retained obturator. J Indian Prosthodont Soc. 2017;17:406
  12. Elbashti M, Hattori M, Sumita Y, Aswehlee A, Yoshi S, Taniguchi H. Creating a digitized database of maxillofacial prostheses (obturators): A pilot study. J Adv Prosthodont. 2016;8:219-23
  13. Tasopoulos T, Kouveliotis G, Polyzois G, Karathanasi V. Fabrication of a 3D printing definitive obturator prosthesis: A Clinical report. Acta Stomatol Croat. 2017;51:53-9
  14. Ye H, Ma Q, Hou Y, Li M, Zhou Y. Generation and evaluation of 3D digital casts of maxillary defects based on multisource data registration: A pilot clinical study. J Prosthet Dent. 2017;118:790-5
  15. Gapinski B, Wieczorowski M, Marciniak-Podsadna L, Dybala B, Ziolkowski G. Comparison of different method of measurement geometry using CMM, optical scanner and computed tomography 3D. Procedia Eng. 2014;69:255-62
  16. van Eijnatten M, Rijkhorst EJ, Hofman M, Forouzanfar T, Wolff J. The accuracy of ultrashort echo time MRI sequences for medical additive manufacturing. Dentomaxillofac Radiol. 2016;45:20150424
  17. Salmi M, Tuomi J, Sirkkanen R, Ingman T, Mäkitie A. Rapid tooling method for soft customized removable oral appliances. Open Dent J. 2012;6:85
  18. Salmi M, Paloheimo KS, Tuomi J, Wolff J, Mäkitie A. Accuracy of medical models made by additive manufacturing (rapid manufacturing). J Craniomaxillofac Surg. 2013;41:603-9
  19. Salmi M, Paloheimo KS, Tuomi J, Ingman T, Mäkitie A. A digital process for additive manufacturing of occlusal splints: a clinical pilot study. J Royal Soc Interface. 2013;10:20130203
  20. Chen H, Wang H, Lv P, Wang Y, Sun Y. Quantitative evaluation of tissue surface adaption of CAD-designed and 3D printed wax pattern of maxillary complete denture. BioMed Res Int. 2015;2015:1-5
  21. Abduo J, Lyons K, Bennamoun M. Trends in computeraided manufacturing in prosthodontics: a review of the available streams. Int J Dent. 2014;2014:1-15
  22. Aramany MA. Basic principles of obturator design for partially edentulous patients. Part I: classification. J prosthet dent. 1978;40:554-7
  23. Yuan FS, Sun YC, Wang Y, Lü PJ. Accuracy evaluation of a new three-dimensional reproduction method of edentulous dental casts, and wax occlusion rims with jaw relation. Int J Oral Sci 2013 ;5:155-61
  24. Abdelhamid AM, Assaad N, Weheda AH. Evaluation of Mucosal Displacement and Denture Settlement for Direct Vs. Indirect Attachment Incorporation in Implant Assisted Mandibular Overdentures. J Dent Health Oral Disord Ther 2016;5:00146
  25. Daly L, Bourke GJ. Interpretation and uses of medical statistics, 5th ed. John Wiley & Sons; 2008.
  26. Armitage P, Berry G, Matthews JN. Statistical methods in medical research, 4th ed. John Wiley & Sons; 2008.
  27. Goodacre BJ, Goodacre CJ, Baba NZ, Kattadiyil MT. Comparison of denture tooth movement between CADCAM and conventional fabrication techniques. J Prosthet Dent. 2018;119:108-15
  28. Parvizi A, Lindquist T, Schneider R, Williamson D, Boyer D, Dawson DV. Comparison of the dimensional accuracy of injection‐molded denture base materials to that of conventional pressure‐pack acrylic resin. J Prosthodont. 2004;13:83-9
  29. Baemmert RJ, Lang BR, Barco Jr MT, Billy EJ. The Effects of Denture Teeth on the Dimensional Accuracy of Acrylic Resin Denture Bases. Int J Prosthodont 1990;3:528-37
  30. Ibrahim D, Broilo TL, Heitz C, de Oliveira MG, de Oliveira HW, Nobre SM, et al. Dimensional error of selective laser sintering, three-dimensional printing and PolyJet™ models in the reproduction of mandibular anatomy. J Craniomaxillofac Surg. 2009;37:167-73
  31. El-Katatny I, Masood SH, Morsi YS. Error analysis of FDM fabricated medical replicas. Rapid Prototyp J. 2010;16:36- 43
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