Effects of implant angulation and impression coping type on the dimensional accuracy of impressions

Ji Suk Shim, Jae Jun Ryu, Sang-Wan Shin, Jeong Yol Lee

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1 Citation (Scopus)


Purpose: To analyze the accuracy of impressions in relation to implant angulation and type of impression coping. Materials and Methods: Three metal master models with 2 implants of 3 different angulations (parallel, mesiodistal, and buccolingual) were fabricated. Nine groups of experimental models were fabricated to duplicate the 3 master models using 3 types of impression copings: transfer, pick-up, and hybrid. The distance between the analogs for each model was measured using a video measuring system. The influence of angulation and type of impression coping was analyzed by a two-way ANOVA (P <0.05). Results: There were significant differences in error rates in relation to implant angulation and type of impression coping (P <0.05). Impressions of buccolingually divergent implants with transfer copings showed statistically higher error rates than other groups (P <0.05). Conclusions: Buccolingual divergence can be a variable that influences the impression accuracy of transfer copings compared with pick-up and hybrid copings. Hybrid copings demonstrate reasonable reproducibility similar to that of pick-up copings.

Original languageEnglish
Pages (from-to)726-729
Number of pages4
JournalImplant Dentistry
Issue number6
Publication statusPublished - 2015



  • divergence
  • pick-up
  • transfer

ASJC Scopus subject areas

  • Oral Surgery

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