J Korean Acad Prosthodont.  2019 Jan;57(1):31-36. 10.4047/jkap.2019.57.1.31.

Interalveolar ridge crest relation analysis and rehabilitation of edentulous patient using dental CAD software: A case report

• Hong Y
• Kim JE
• Shim JS

• KMID: 2431999
• DOI: http://doi.org/10.4047/jkap.2019.57.1.31

Abstract

As the number of elderly population increases, the proportion of edentulous patients is increasing, and the demand for traditional dentures will also increase. Arranging the artificial teeth according to the relationship and shape of the upper and lower alveolar ridge is an important factor increasing the stability of the denture. This case is a 79 year old female patient who wishes to make denture covered by national health insurance for psychological and economical reasons. With the alveolar bone severely atrophic, the dental CAD software was used for accurate diagnosis and the posterior teeth were arranged in a cross bite according to the interalveolar crest line angle by the program. After completion, the denture showed adequate stability and maintenance in periodic examinations and treatment, and the patient also expressed high satisfaction.

Keyword

Complete denture; Digital dentistry; Cross bite

MeSH Terms

Aged
Alveolar Process
Denture, Complete
Dentures
Diagnosis
Female
Humans
Malocclusion
National Health Programs
Rehabilitation*
Tooth
Tooth, Artificial

Figure

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  Fig. 1 (A) Panoramic radiographic view, (B) Initial intraoral photographs and, (C) Existing prosthesis at first visit.

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  Fig. 2 (A) Border molding of upper arch for final impression, (B) Border molding and final impression of lower arch using modeling compound.

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  Fig. 3 Final impression and master cast fabrication. (A) Final impression of maxilla, (B) Final impression of mandible, (C) Master cast of maxilla, (D) Master cast of mandible.

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  Fig. 4 Jaw relation record and mounting. (A) Vertical dimension, (B) Horizontal relation, (C) Mounted cast. (D) Verification of centric relation bite.

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  Fig. 5 Captured image of (A) Preliminary teeth arrangement, (B) Cross sectional view on 1st and 2nd molar, (C) Measuring of interalveolar crest line angle.

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  Fig. 6 Frontal and occlusal views of arranged resin teeth.

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  Fig. 7 Determining neutral zone with tissue conditioner.

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  Fig. 8 Photos of occlusal and impression surfaces after finishing of resin processed denture.

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  Fig. 9 Intraoral photos after delivery of new denture at centric position.

Reference

1. Korea S. Population projections for Korea. 2017. Population projections for Korea (2015~2045). Available from: http://kosis.kr/statHtml/statHtml.do?orgId=101&tblId=DT_1BPA002&checkFlag=N. 2017-06-15.

2. Ministry of Health & Welfare. Advanced analysis of Korean national oral health survey. 2011. p. 320–349.

3. Yadav B, Jayna M, Yadav H, Suri S, Phogat S, Madan R. Comparison of different final impression techniques for management of resorbed mandibular ridge: a case report. Case Rep Dent. 2014; 2014:253731.

4. McCord JF, Tyson KW. A conservative prosthodontic option for the treatment of edentulous patients with atrophic (flat) mandibular ridges. Br Dent J. 1997; 182:469–472.

5. Tunkiwala A, Ram S. Management of mandibular poor foundation: conventional complete dentures. Dent Pract. 2013; 11:34–37.

6. Makzoumé JE. Morphologic comparison of two neutral zone impression techniques: a pilot study. J Prosthet Dent. 2004; 92:563–568.

7. Beresin VE, Schiesser FJ. The neutral zone in complete dentures. J Prosthet Dent. 1976; 36:356–367.

8. Sanghvi SJ, Bhatt NA, Bhargava K. An evaluation of crossbite ridge relationships. A study of articulated jaw records of 150 edentulous patients. J Prosthet Dent. 1981; 45:24–29.

9. Kapur KK, Soman S. The effect of denture factors on masticatory performance part III. The location of food platforms. 1965. J Prosthet Dent. 2006; 95:265–273.

10. Bilhan H, Geckili O, Ergin S, Erdogan O, Ates G. Evaluation of satisfaction and complications in patients with existing complete dentures. J Oral Sci. 2013; 55:29–37.

11. Wehner PJ, Hickey JC, Boucher CO. Selection of artificial teeth. J Prosthet Dent. 1967; 18:222–232.

12. Yoshida K, Okane H, Nagasawa T, Tsuru H. A criterion for the selection of artificial posterior teeth. J Oral Rehabil. 1988; 15:373–378.

13. McGarry TJ, Nimmo A, Skiba JF, Ahlstrom RH, Smith CR, Koumjian JH. Classification system for complete edentulism. Dent Today. 2001; 20:90–95.