Abstract
This study investigated the effect of undersized preparations with two different implant
macrogeometries. There were four experimental groups: group 1, conical implant with
an undersized osteotomy of 3.2 mm; group 2, conical implant with an undersized osteotomy of 3.5 mm; group 3, cylindrical implant with an undersized osteotomy of 3.2 mm; group 4, cylindrical implant with an undersized osteotomy of 3.5 mm. Implants were placed in one side of the sheep mandible (n = 6). After 3 weeks, the same procedure was conducted on the other side; 3 weeks later,
euthanasia was performed. All implants were 4 mm × 10 mm. Insertion torque was recorded for all implants during implantation. Retrieved
samples were subjected to histological sectioning and histomorphometry. Implants of
groups 1 and 2 presented significantly higher insertion torque than those of groups
3 and 4 (P < 0.001). No differences in bone-to-implant contact or bone area fraction occupied were
observed between the groups at 3 weeks (P > 0.24, and P > 0.25, respectively), whereas significant differences were observed at 6 weeks between
groups 1 and 2, and between groups 3 and 4 (P < 0.01). Undersized drilling affected the biological establishment of bone formation
around both dental implant macrogeometries.
Key words
To read this article in full you will need to make a payment
Purchase one-time access:
Academic & Personal: 24 hour online accessCorporate R&D Professionals: 24 hour online accessOne-time access price info
- For academic or personal research use, select 'Academic and Personal'
- For corporate R&D use, select 'Corporate R&D Professionals'
Subscribe:
Subscribe to International Journal of Oral and Maxillofacial SurgeryAlready a print subscriber? Claim online access
Already an online subscriber? Sign in
Register: Create an account
Institutional Access: Sign in to ScienceDirect
References
- Implant stability and bone remodeling after 3 and 13 days of implantation with an initial static strain.Clin Implant Dent Relat Res. 2012; October ([Epub ahead of print])
- Evaluation of primary and secondary stability of titanium implants using different surgical techniques.Clin Oral Implants Res. 2014; 25: 487-492
- Initial torque stability of a new bone condensing dental implant. A cohort study of 140 consecutively placed implants.J Oral Implantol. 2009; 35: 277-282
- Identification of bone quality in conjunction with insertion of titanium implants. A pilot study in jaw autopsy specimens.Clin Oral Implants Res. 1995; 6: 213-219
- Primary stability, insertion torque and bone density of cylindric implant ad modum Branemark: is there a relationship? An in vitro study.Clin Oral Implants Res. 2011; 22: 567-570
- Implant micromotion is related to peak insertion torque and bone density.Clin Oral Implants Res. 2009; 20: 467-471
- Influence of implant design on the biomechanical environment of immediately placed implants: computed tomography-based nonlinear three-dimensional finite element analysis.Int J Oral Maxillofac Implants. 2011; 26: 1279-1287
- The effect of different surgical drilling procedures on full laser-etched microgrooves surface treated implants. An experimental study in sheep.Clin Oral Implants Res. 2013; June ([Epub ahead of print])
- Implant compression necrosis: current understanding and case report.J Periodontol. 2009; 80: 700-704
- Effect of drilling dimension on implant placement torque and early osseointegration stages: an experimental study in dogs.J Oral Maxillofac Surg. 2012; 70: e43-e50
- The effects of superficial roughness and design on the primary stability of dental implants.Clin Implant Dent Relat Res. 2011; 13: 215-223
- The effect of different implant macrogeometries and surface treatment in early biomechanical fixation: an experimental study in dogs.J Mech Behav Biomed Mater. 2011; 4: 1974-1981
- Biomechanical evaluation of macro and micro designed screw-type implants: an insertion torque and removal torque study in rabbits.Clin Oral Implants Res. 2013; 24: 342-346
- Evaluation of stress pattern generated through various thread designs of dental implants loaded in a condition of immediately after placement and on osseointegration—an FEA study.Implant Dent. 2013; 22: 91-96
- The effects of flute shape and thread profile on the insertion torque and primary stability of dental implants.Med Eng Phys. 2012; 34: 797-805
- Measurements comparing the initial stability of five designs of dental implants: a human cadaver study.Clin Implant Dent Relat Res. 2000; 2: 85-92
- Influence of implant taper on the primary and secondary stability of osseointegrated titanium implants.Clin Oral Implants Res. 2004; 15: 474-480
- Influence of the surgical technique and surface roughness on the primary stability of an implant in artificial bone with a density equivalent to maxillary bone: a laboratory study.Clin Oral Implants Res. 2009; 20: 327-332
- Tissue-integrated prostheses: osseointegration in clinical dentistry.Quintessence Publishing Co., Chicago, IL1985
- A method for the study of undecalcified bones and teeth with attached soft tissues. The Sage–Schliff (sawing and grinding) technique.J Oral Pathol. 1982; 11: 318-326
- A study of the bone healing kinetics of plateau versus screw root design titanium dental implants.Clin Oral Implants Res. 2009; 20: 232-239
- Increase of pullout strength of spinal pedicle screws with conical core: biomechanical tests and finite element analyses.J Orthop Res. 2005; 23: 788-794
- Comparison of stability between cylindrical and conical type mini-implants. Mechanical and histological properties.Angle Orthod. 2008; 78: 692-698
- Influence of implant shape, surface morphology, surgical technique and bone quality on the primary stability of dental implants.J Mech Behav Biomed Mater. 2012; 16: 169-180
- Early bone healing around different implant bulk designs and surgical techniques: a study in dogs.Clin Implant Dent Relat Res. 2010; 12: 202-208
- Evaluation of a nanometer roughness scale resorbable media-processed surface: a study in dogs.Clin Oral Implants Res. 2012; 23: 119-124
Article info
Publication history
Published online: May 01, 2014
Accepted:
March 25,
2014
Identification
Copyright
© 2014 International Association of Oral and Maxillofacial Surgeons. Published by Elsevier Inc. All rights reserved.
