J Dent Rehabil Appl Sci.  2024 May;40(2):82-90. 10.14368/jdras.2024.40.2.82.

Fabrication of surveyed crown and repairing the artificial teeth for existing removable partial denture using digital technology: a case report

• Kim I
• Oh E
• Park SW
• Lim HP
• Yun Kd
• Park C

• KMID: 2562752
• DOI: http://doi.org/10.14368/jdras.2024.40.2.82

Abstract

It often happens that a removable partial denture needs to be repaired due to tissue changes in the remaining alveolar ridge, fracture of the denture, or fracture of the abutment tooth. There are several advantages to retrofitting a customized surveyed crown under the existing RPD. Retrofitting a crown to the RPD decreases the economic burden to the patient and avoids the need for several appointments to fabricate a new RPD. It is difficult for artificial teeth used to repair dentures due to fractured natural teeth to have a shape similar to that of natural teeth, and to repair aesthetic artificial teeth, it is necessary to manufacture customized artificial teeth similar to the shape of each patient’s teeth. Recently, CAD/CAM technology has been used to fabricate customized prosthetics on existing RPD to achieve high retention and fitness accuracy, and by manufacturing customized artificial teeth, more aesthetic and harmonious artificial tooth repair is possible. This is a case in which a denture was repaired using a digital method to fabricate a customized prosthesis on an existing partial denture and customized artificial teeth that mirrored the adjacent dentition, saving time and cost, simplifying the process, and achieving aesthetically and functionally satisfactory results.

Keyword

retrofitting; computer-aided design and computer-aided manufacturing (CAD/CAM); milled artificial teeth

Figure

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  Fig. 1 Initial intraoral photographs. (A) Right view, (B) Frontal view, (C) Left view.

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  Fig. 2 Intraoral photographs with old denture. (A) Right view, (B) Frontal view, (C) Left view.

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  Fig. 3 Intraoral scan. (A, D) Abutment tooth, (B, E) Abutment tooth with RPD, (C, F) RPD.

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  Fig. 4 Design the crown using CAD software program. (A) Merging the STL files, (B) Contact point, (C) Clasp tip, (D) Crown fitness with palatal plate (0.025 - 0.050 mm).

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  Fig. 5 (A) Setting path of insertion, (B) Giving 10 G undercut below the Wrought wire clasp.

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  Fig. 6 Intraoral photographs with old denture after final cementation. (A) Right view, (B) Frontal view, (C) Left view.

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  Fig. 7 Measuring the gap distance between the crown and the palatal plate as a fitness check using 3Dme studio (Imagoworks Inc, Seoul, Republic of Korea). (A) Distance between maxillary right canine and palatal plate (0.141 mm), (B) Distance between maxillary right lateral incisor and palatal plate (0.149 mm), (C) Distance between maxillary right central incisor and palatal plate (0.157 mm).

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  Fig. 8 Removal of artificial teeth and clasp arm. (A) Frontal view, (B) Maxillary occlusal view.

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  Fig. 9 Design the Artificial teeth by mirroring adjacent dentition (exocad; exocad GmbH, Darmstadt, Germany).

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  Fig. 10 Comparison of Initial & Final denture. (A, C) Before, (B, D) After, (E) Extraoral photograph with final denture.

Reference

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