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Minimizing the extra-oral time in autogeneous tooth transplantation: use of computer-aided rapid prototyping (CARP) as a duplicate model tooth.

Lee SJ, Kim E - Restor Dent Endod (2012)

Bottom Line: And extra-oral time was recorded during the autotransplantation of the teeth.The average extra-oral time was 7 min 25 sec with the range of immediate to 25 min in cases which extra-oral root canal treatments were not performed while it was 9 min 15 sec when extra-oral root canal treatments were performed.The average radiographic distance between the root surface and the alveolar bone was 1.17 mm and 1.35 mm at mesial cervix and apex; they were 0.98 mm and 1.26 mm at the distal cervix and apex.

View Article: PubMed Central - PubMed

Affiliation: Microscope Center, Department of Conservative Dentistry and Oral Science Research Center, Yonsei University College of Dentistry, Seoul, Korea.

ABSTRACT

Objectives: The maintenance of the healthy periodontal ligament cells of the root surface of donor tooth and intimate surface contact between the donor tooth and the recipient bone are the key factors for successful tooth transplantation. In order to achieve these purposes, a duplicated donor tooth model can be utilized to reduce the extra-oral time using the computer-aided rapid prototyping (CARP) technique.

Materials and methods: Briefly, a three-dimensional digital imaging and communication in medicine (DICOM) image with the real dimensions of the donor tooth was obtained from a computed tomography (CT), and a life-sized resin tooth model was fabricated. Dimensional errors between real tooth, 3D CT image model and CARP model were calculated. And extra-oral time was recorded during the autotransplantation of the teeth.

Results: The average extra-oral time was 7 min 25 sec with the range of immediate to 25 min in cases which extra-oral root canal treatments were not performed while it was 9 min 15 sec when extra-oral root canal treatments were performed. The average radiographic distance between the root surface and the alveolar bone was 1.17 mm and 1.35 mm at mesial cervix and apex; they were 0.98 mm and 1.26 mm at the distal cervix and apex. When the dimensional errors between real tooth, 3D CT image model and CARP model were measured in cadavers, the average of absolute error was 0.291 mm between real teeth and CARP model.

Conclusions: These data indicate that CARP may be of value in minimizing the extra-oral time and the gap between the donor tooth and the recipient alveolar bone in tooth transplantation.

No MeSH data available.


Related in: MedlinePlus

(a) A 12-year old male patient visited for reposition of the avulsed tooth (center). The extra-oral time before reposition was about two hours; (b) Root of the repositioned tooth became severely resorbed after 4 years; (c) Extracted tooth showed almost no root structure left.
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Figure 1: (a) A 12-year old male patient visited for reposition of the avulsed tooth (center). The extra-oral time before reposition was about two hours; (b) Root of the repositioned tooth became severely resorbed after 4 years; (c) Extracted tooth showed almost no root structure left.

Mentions: However, unlike the soft tissue organs, hard tissue transplantation such as teeth requires a procedure for contouring the recipient bone in order for the donor tooth to sit properly in the recipient site. The tooth root is covered with a thin layer of connective tissue, which is known as the periodontal ligament. The presence of intact and viable periodontal ligament cells on the root surface of a donor tooth is most important for the healing of transplanted teeth.2 Several factors affecting the periodontal ligament healing include the extra-oral time of the donor tooth, the storage method until transplant, surgical trauma, and contamination of the root surface and/or root canal. Among those, the extra-oral time of the donor tooth prior to transplantation has the most significant effect on the success rate.3 In clinics, it is frequently found that the extended extra-oral time of the donor tooth causes severe root resorption (Figure 1).


Minimizing the extra-oral time in autogeneous tooth transplantation: use of computer-aided rapid prototyping (CARP) as a duplicate model tooth.

Lee SJ, Kim E - Restor Dent Endod (2012)

(a) A 12-year old male patient visited for reposition of the avulsed tooth (center). The extra-oral time before reposition was about two hours; (b) Root of the repositioned tooth became severely resorbed after 4 years; (c) Extracted tooth showed almost no root structure left.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3569397&req=5

Figure 1: (a) A 12-year old male patient visited for reposition of the avulsed tooth (center). The extra-oral time before reposition was about two hours; (b) Root of the repositioned tooth became severely resorbed after 4 years; (c) Extracted tooth showed almost no root structure left.
Mentions: However, unlike the soft tissue organs, hard tissue transplantation such as teeth requires a procedure for contouring the recipient bone in order for the donor tooth to sit properly in the recipient site. The tooth root is covered with a thin layer of connective tissue, which is known as the periodontal ligament. The presence of intact and viable periodontal ligament cells on the root surface of a donor tooth is most important for the healing of transplanted teeth.2 Several factors affecting the periodontal ligament healing include the extra-oral time of the donor tooth, the storage method until transplant, surgical trauma, and contamination of the root surface and/or root canal. Among those, the extra-oral time of the donor tooth prior to transplantation has the most significant effect on the success rate.3 In clinics, it is frequently found that the extended extra-oral time of the donor tooth causes severe root resorption (Figure 1).

Bottom Line: And extra-oral time was recorded during the autotransplantation of the teeth.The average extra-oral time was 7 min 25 sec with the range of immediate to 25 min in cases which extra-oral root canal treatments were not performed while it was 9 min 15 sec when extra-oral root canal treatments were performed.The average radiographic distance between the root surface and the alveolar bone was 1.17 mm and 1.35 mm at mesial cervix and apex; they were 0.98 mm and 1.26 mm at the distal cervix and apex.

View Article: PubMed Central - PubMed

Affiliation: Microscope Center, Department of Conservative Dentistry and Oral Science Research Center, Yonsei University College of Dentistry, Seoul, Korea.

ABSTRACT

Objectives: The maintenance of the healthy periodontal ligament cells of the root surface of donor tooth and intimate surface contact between the donor tooth and the recipient bone are the key factors for successful tooth transplantation. In order to achieve these purposes, a duplicated donor tooth model can be utilized to reduce the extra-oral time using the computer-aided rapid prototyping (CARP) technique.

Materials and methods: Briefly, a three-dimensional digital imaging and communication in medicine (DICOM) image with the real dimensions of the donor tooth was obtained from a computed tomography (CT), and a life-sized resin tooth model was fabricated. Dimensional errors between real tooth, 3D CT image model and CARP model were calculated. And extra-oral time was recorded during the autotransplantation of the teeth.

Results: The average extra-oral time was 7 min 25 sec with the range of immediate to 25 min in cases which extra-oral root canal treatments were not performed while it was 9 min 15 sec when extra-oral root canal treatments were performed. The average radiographic distance between the root surface and the alveolar bone was 1.17 mm and 1.35 mm at mesial cervix and apex; they were 0.98 mm and 1.26 mm at the distal cervix and apex. When the dimensional errors between real tooth, 3D CT image model and CARP model were measured in cadavers, the average of absolute error was 0.291 mm between real teeth and CARP model.

Conclusions: These data indicate that CARP may be of value in minimizing the extra-oral time and the gap between the donor tooth and the recipient alveolar bone in tooth transplantation.

No MeSH data available.


Related in: MedlinePlus