Relation between insertion torque and bone–implant contact percentage: an artificial bone study

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• 作者：Cheng Liu (1)
  Ming-Tzu Tsai (2)
  Heng-Li Huang (3)
  Michael Yuan-Chien Chen (3) (4)
  Jui-Ting Hsu (3)
  Kuo-Chih Su (1)
  Chih-Han Chang (1)
  Aaron Yu-Jen Wu (5)
  
• 关键词：Initial implant stability ; Insertion torque ; Bone–implant contact ; Micro ; computed tomography
• 刊名：Clinical Oral Investigations
• 出版年：2012
• 出版时间：December 2012
• 年：2012
• 卷：16
• 期：6
• 页码：1679-1684
• 全文大小：243KB
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• 作者单位：Cheng Liu (1)
  Ming-Tzu Tsai (2)
  Heng-Li Huang (3)
  Michael Yuan-Chien Chen (3) (4)
  Jui-Ting Hsu (3)
  Kuo-Chih Su (1)
  Chih-Han Chang (1)
  Aaron Yu-Jen Wu (5)
  
  1. Institute of Biomedical Engineering, National Cheng Kung University, Tainan, 701, Taiwan
  2. Department of Biomedical Engineering, HungKuang University, Shalu, 433, Taiwan
  3. School of Dentistry, College of Medicine, China Medical University, 91 Hsueh-Shih Road, Taichung, 404, Taiwan
  4. Division of Oral & Maxillofacial Surgery, China Medical University Hospital, 2 Yuh-Der Road, Taichung, 404, Taiwan
  5. Department of Dentistry, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, 833, Taiwan
  
• ISSN：1436-3771

文摘

Objectives The purpose of this study was to determine the correlation between the peak insertion torque value (ITV) of a dental implant and the bone–implant contact percentage (BIC%). Material and methods Dental implants were inserted into specimens comprising a 2-mm-thick artificial cortical shell representing cortical bone and artificial foam bone representing cancellous bone with four densities (groups 1 to 4-.32, 0.20, 0.16, and 0.12?g/cm3). Each specimen with an inserted implant was subjected to micro-computed tomography (micro-CT) scanning, from which the 3D BIC% values were calculated. Pearson’s correlation coefficients (r) between the ITV and BIC% were calculated. Results The ITVs in groups 1 to 4 were 56.2?±-.6 (mean±standard deviation), 45.6?±-.9, 43.3?±-.3, and 38.5?±-.4?N?cm, respectively, and the corresponding BIC% values were 41.5?±-.5%, 39.0?±-.0%, 30.8?±-.1%, and 26.2?±-.6%. Pearson’s correlation coefficient between the ITV and BIC% was r--.797 (P-lt;-.0001). Conclusion The initial implant stability, quantified as the ITV, was strongly positively correlated with the 3D BIC% obtained from micro-CT images. Clinical relevance The ITV of a dental implant can be used to predict the initial BIC%; this information may provide the clinician with important information on the optimal loading time.