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Accuracy of Customized Prefabricated Screw-Type Immediate Provisional Restorations after Single-Implant Placement

Authors
 Kyung Chul Oh  ;  Jee-Hwan Kim  ;  Chang-Woo Woo  ;  Hong Seok Moon 
Citation
 JOURNAL OF CLINICAL MEDICINE, Vol.8(4) : E490, 2019 
Journal Title
 JOURNAL OF CLINICAL MEDICINE 
Issue Date
2019
Keywords
computer-aided design ; computer-assisted implant surgical guide ; digital workflow ;  immediate provisionalization ; prosthetic-driven implant placement ;  single-implant
Abstract
Limited evidence is available comparing the differences between pre-operative and post-operative 3D implant positions from the viewpoint of prosthetics. We aimed to investigate the differences between preplanned positions of virtual provisional restorations and their actual positions following fully guided single-implant placement. Ten maxillary typodonts with missing right central incisors were imaged using cone-beam computed tomography, and digital impressions were obtained using an intraoral scanner. These data were imported into implant-planning software, following which the provisional restorations were designed. After data superimposition, an appropriate implant position was determined, and a computer-assisted implant surgical guide was designed for each typodont. Orders generated from the implant-planning software were imported into relevant computer-aided design software to design the custom abutments. The abutments, provisional restorations, and surgical guides were fabricated, and each restoration was cemented to the corresponding abutments, generating a screw-type immediate provisional restoration. The implants were placed using the surgical guides, and the screw-type provisional restorations were engaged to the implants. The typodonts were then rescanned using the intraoral scanner. The restorations designed at the treatment planning stage were compared with those in the post-operative scan using metrology software. The angular deviation around the central axis of the implant was measured, and the differences in the crown position were converted to root mean square (RMS) values. The post-operative provisional restorations exhibited an absolute angular deviation of 6.94 ± 5.78° and an RMS value of 85.8 ± 20.2 µm when compared with their positions in the pre-operative stage. Within the limitations of the present in vitro study, the results highlight the potential application of customized prefabricated immediate provisionalrestorations after single-implant placement.
Files in This Item:
T201902317.pdf Download
DOI
10.3390/jcm8040490
Appears in Collections:
7. Others (기타) > Gangnam Severance Hospital (강남세브란스병원) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Prosthodontics (보철과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Jee Hwan(김지환) ORCID logo https://orcid.org/0000-0002-0872-4906
Moon, Hong Seok(문홍석) ORCID logo https://orcid.org/0000-0001-8118-8145
Oh, Kyung Chul(오경철) ORCID logo https://orcid.org/0000-0003-4584-2597
Woo, Chang Woo(우창우)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/170432
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