PMID: 16274140Nov 9, 2005Paper

The effect of a machined collar on coronal hard tissue around titanium implants: a radiographic study in the canine mandible

The International Journal of Oral & Maxillofacial Implants
Adeeb N AlomraniDavid L Cochran


The purpose of this study was to radiographically evaluate the effect of a machined titanium coronal collar on the marginal bone around 1-part endosseous dental implants placed at different heights relative to the bone crest. Sixty dental implants were placed in edentulous spaces bilaterally in 5 foxhounds. Thirty test implants had a sandblasted, large-grit, dual acid-etched surface (SLA) over the entire length of the implant. The other 30 implants (control) had a machined collar around the most coronal 1.8 mm of the implant; an SLA surface covered the remainder of the implant. Both control and test implants were placed at 3 distinct levels relative to the bone crest. Six implants (3 control and 3 test) were randomly placed side by side in each hemimandible. Radiographs were taken at placement (baseline) and monthly for 6 months postplacement using a standardized radiographic template. Fifty-eight of the implants integrated and were analyzed on each proximal surface. Bone loss occurred around all implants over the 6 months of the study. In general, implants placed with the top of the SLA surface above the bone crest had significantly less bone loss than implants with the top of the SLA surface placed flush with the bone level. ...Continue Reading

Related Concepts

Endosseous Implant Procedure
Canis familiaris
Mylohyoid Ridge
Surface Properties
Dental Prostheses, Surgical
Alveolar Bone Loss
Dental Prosthesis Design
Implants, Experimental

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