An intra-oral hydraulic system for controlled loading of dental implants

Ching Chang Ko, James Q. Swift, Ralph DeLong, William H. Douglas, Young Il Kim, Kai Nan An, Chih Han Chang, Heng Li Huang

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


This study reports a method for controlling loads on an in vivo dental implant and its application for the investigation of early loading versus delayed loading of dental implants. The method was developed for the purpose of studying an ongoing hypothesis that amounts to bone loss around dental implants are related to mechanical-mediated adaptation of the alveolar bone. Using a customized intra-oral hydraulic system, the daily loading over a dental implant has been completed and recorded for six Sinclair swine. Each pig had a 5-month duration implant loading. During the experiments (loading), no analgesic treatment was supplied. The mean of the in vivo daily loadings was confirmed through an in vitro bench test after each animal was euthanized. Variations of the averaged loading input among the six animals were smaller than 10%. Preliminary data produced by the model suggests that cervical bone loss is less for early loading than for delayed loading. The current system is expected to provide a useful load control model for the study of alveolar bone adaptation around dental implants in relation to various loadings.

Original languageEnglish (US)
Pages (from-to)863-869
Number of pages7
JournalJournal of Biomechanics
Issue number6
StatePublished - 2002


  • Biomechanics
  • Bone loss
  • Dental implants
  • Early loading

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine
  • Biomedical Engineering
  • Rehabilitation


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