Comparing Facial Esthetic and Volumetric Changes of an Edentulous Patient After Either Conventional or Neutral Zone Technique
Abstract
The aim of the present case report was to compare the soft tissue measurements, volumetric differences on face of the patient whose complete dentures were fabricated either with conventional or neutral zone impression techniques. Two different complete dentures were fabricated according to conventional and neutral zone impression techniques. The measurement of soft tissue changes was evaluated on lateral cephalograms; conventional technique (L1), neutral zone technique (L2) and with no dentures (L3). Three images (I) were taken on the same day respectively with dentures completed by conventional technique (I1), dentures completed by neutral zone technique (I2), and with no dentures (I3). Superimposition of the images were evaluated. The cephalometric soft tissue measurements of the present case showed that upper and lower lips were positioned anteriorly in both conventional (L1) and neutral zone techniques (L2) on sagittal plane. These results could be attributed to the fact that the placement of the prosthesis in mouth helps directing lip position with big linear measurements. Volumetric difference between conventional (I1) and no denture (I3) images was more pronounced compared to neutral zone (I2) superposition with no denture (I3).
References
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- 2. Glossary of prosthodontic terms. 7th ed. J Prosthet Dent. 1999;81-86.
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- 9. Fahmy FM, Kharat DU. A study of the importance of the neutral zone in complete dentures. J Prosthet Dent. 1990;64:459-462.
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- 11. Ushijima M, Kamashita Y, Nishi Y, Nagaoka E. Changes in lip forms on three-dimensional images with alteration of lip support and/or occlusal vertical dimension in complete denture wearers. J Prosthodont Res. 2013;57:113-121.
- 12. Fanibunda KB, Allcock GC, Thomason JM. Changes in the facial profile following insertion of complete dentures. Eur J Prosthodont Restor Dent. 2002;10:143-149.
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- 14. Toyoshima GHL, Pucciarelli MGR, Neppelenbroek KH, Sforza C, Menezes M, Oliveira TM, et al. Evaluation by 3D stereophotogrammetry of facial changes in edentulous patients after rehabilitation. J Appl Oral Sci. 2021;30:e20210462.
- 15. Pucciarelli MGR, Hideki de Lima Toyoshima G, de Oliveira TM, Neppelenbroek KH, Soares S. Quantifying the facial proportions in edentulous individuals before and after rehabilitation with complete dentures compared with dentate individuals: A 3D stereophotogrammetry study. J Prosthet Dent. 2022 Apr 14:S0022-3913(22)00188-3.
Abstract
References
- 1. Porwal A, Jain P, Birader SP, Nelogi S, Naveen HC. Neutral zone approach for rehabilitation of severely atrophic ridge. Int J Dent Clin. 2010;2:53-57.
- 2. Glossary of prosthodontic terms. 7th ed. J Prosthet Dent. 1999;81-86.
- 3. Makzoume JE. Morphologic comparison of two neutral zone impression techniques: A pilot Study. J Prosthet Dent. 2004;92:563-568.
- 4. Raybin NH. The polished surface of complete dentures. J Prosthet Dent. 1963;13:236-239.
- 5. Patil PG. Conventional complete denture for a left segmental mandibulectomy patient: A clinical report. J Prosthodont Res. 2010;54:192-197.
- 6. Beresin VE, Schiesser FJ. The neutral zone in complete dentures. J Prosthet Dent. 1976;36:356-367.
- 7. Gibelli D, Pucciarelli V, Cappella A, Dolci C, Sforza C. Are portable stereophotogrammetric devices reliable in facial imaging? A validation study of VECTRA H1 device. J Oral Maxillofac Surg. 2018;76:1772-1784.
- 8. Gahan MJ, Walmsley AD. The neutral zone impression revisited. Br Dent J. 2005;198:269-272.
- 9. Fahmy FM, Kharat DU. A study of the importance of the neutral zone in complete dentures. J Prosthet Dent. 1990;64:459-462.
- 10. Ismail YH, George WA, Sassouni V, Scott RH. Cephalometric study of the changes occurring in the face height following prosthetic treatment. I. Gradual reduction of both occlusal and rest face heights. J Prosthet Dent. 1968;19:321-330.
- 11. Ushijima M, Kamashita Y, Nishi Y, Nagaoka E. Changes in lip forms on three-dimensional images with alteration of lip support and/or occlusal vertical dimension in complete denture wearers. J Prosthodont Res. 2013;57:113-121.
- 12. Fanibunda KB, Allcock GC, Thomason JM. Changes in the facial profile following insertion of complete dentures. Eur J Prosthodont Restor Dent. 2002;10:143-149.
- 13. Wright CR. Evaluation of the factors necessary to develop stability in mandibular dentures. J Prosthet Dent. 2004;92:509-518.
- 14. Toyoshima GHL, Pucciarelli MGR, Neppelenbroek KH, Sforza C, Menezes M, Oliveira TM, et al. Evaluation by 3D stereophotogrammetry of facial changes in edentulous patients after rehabilitation. J Appl Oral Sci. 2021;30:e20210462.
- 15. Pucciarelli MGR, Hideki de Lima Toyoshima G, de Oliveira TM, Neppelenbroek KH, Soares S. Quantifying the facial proportions in edentulous individuals before and after rehabilitation with complete dentures compared with dentate individuals: A 3D stereophotogrammetry study. J Prosthet Dent. 2022 Apr 14:S0022-3913(22)00188-3.
Details
| Primary Language | English |
|---|---|
| Subjects | Health Care Administration |
| Journal Section | Case Reports |
| Authors | |
| Publication Date | September 29, 2023 |
| Submission Date | January 23, 2023 |
| Published in Issue | Year 2023 |
Cumhuriyet Dental Journal (Cumhuriyet Dent J, CDJ) is the official publication of Cumhuriyet University Faculty of Dentistry. CDJ is an international journal dedicated to the latest advancement of dentistry. The aim of this journal is to provide a platform for scientists and academicians all over the world to promote, share, and discuss various new issues and developments in different areas of dentistry. First issue of the Journal of Cumhuriyet University Faculty of Dentistry was published in 1998. In 2010, journal's name was changed as Cumhuriyet Dental Journal. Journal’s publication language is English.
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