J Periodontal Implant Sci.  2019 Feb;49(1):39-46. 10.5051/jpis.2019.49.1.39.

Primary stability of implants with peri-implant bone defects of various widths: an in vitro investigation

• Yim HJ
• Lim HC
• Hong JY
• Shin SI
• Chung JH
• Herr Y
• Shin SY

• KMID: 2440176
• DOI: http://doi.org/10.5051/jpis.2019.49.1.39

Abstract

PURPOSE
This study aimed to evaluate the effects of i) the extent of peri-implant bone defects and ii) the application of bone cement on implant stability with respect to the measurement direction.
METHODS
In 10 bovine rib bones, 4 implant osteotomies with peri-implant bone defects of various widths were prepared: i) no defect (D0), ii) a 2-mm-wide defect (D2), iii) a 4-mm-wide defect (D4), and iv) a 8-mm-wide defect (D8). The height of all defects was 10 mm. Implant stability quotient (ISQ) values and Periotest values (PTVs) were measured after implant placement and bone cement application.
RESULTS
With increasing defect width, decreased ISQs and increased PTVs were observed. Statistically significant differences were found between groups D0 and D8, D0 and D4, and D2 and D8. Prior to bone cement application, inconsistent PTVs were found in group D8 depending on the measurement direction. Bone cement increased the implant stability.
CONCLUSION
Peri-implant bone deficits measuring around 50% of the implant surface compromised implant stability. Clinically, PTVs should be cautiously interpreted in implants with large peri-implant defects due to inconsistent recordings with respect to the measurement direction.

Keyword

Alveolar bone loss; Anatomic models; Bone transplantation; Dental implants

MeSH Terms

Alveolar Bone Loss
Bone Transplantation
Dental Implants
In Vitro Techniques*
Models, Anatomic
Osteotomy
Ribs
Dental Implants

Figure

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  Figure 1 Experimental procedure for defect preparation and implant stability measurements. (A, B) Implant placement after preparing osteotomies and defects. (C, D) Bone cement application.

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