Editorial Type:
Article Category: Research Article
 | 
Online Publication Date: 01 Dec 2005

Crestal Bone Loss Minimized When Following the Crestal Preparation Protocol: A Histomorphometric Study in Dogs

DDS,
,
DDS,
DDS,
DDS,
DDS, and
Page Range: 276 – 282
DOI: 10.1563/1548-1336(2005)31[276:CBLMWF]2.0.CO;2
Save
Download PDF

Abstract

Initial breakdown of the implant-tissue interface generally begins at the crestal region in successfully osseointegrated implants. The purpose of this study was to evaluate the effect on crestal bone loss (CBL) around implants specially developed for immediate loading with a unique crestal drill. After 8 weeks postextraction, 6 young male mongrel dogs received 48 implants (XiVE) in the region corresponding to the 4 mandibular premolars. The implant sites were prepared according to the manufacturer's protocol with conventional standard drills. Before implant placement, the crestal drill was used in the experimental group but not in the control group. After a healing period of 12 weeks, the dogs were sedated and euthanized. Through linear measurements, from the top of the implant to the first bone-implant contact, the amount of CBL was determined. The histomorphometric results of CBL (mean ± SEM) were 0.88 ± 0.13 mm (range 0.0–3.0 mm) in the experimental group and 1.69 ± 0.17 mm (range 0.0–4.2 mm) in the control group. The difference was statistically significant (P < .05) when the implants were used as the experimental units. The statistical analysis also revealed significance when the dogs were used as the experimental units (P < .05). When the median was used for analyses, the CBL was 0.44 mm for the experimental group and 1.91 mm for the control group. Crestal bone loss was minimized when the crestal preparation protocol was carefully followed by using the osseocondensating XiVE implant system.

Copyright: American Academy of Implant Dentistry


<sc>Figure</sc>
7.
Figure 7.

Frequency distribution of the number of implants in relation to the crestal bone loss values in millimeters


Contributor Notes

Arthur B. Novaes Jr, DDS, is professor and chairman, Rafael R. de Oliveira is a graduate student, and Mário Taba Jr, DDS, Sérgio L. S. de Souza, DDS, Daniela B. Palioto, DDS, and Márcio F. M. Grisi, DDS, are professors in the Department of Bucco Maxillo Facial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil. Address correspondence to Dr Arthur B. Novaes Jr, DDS, Faculdade de Odontologia de Ribeirão Preto, Universidade de São Paulo, Av do Café s/n, 14040-904, Ribeirão Preto, São Paulo, Brasil (novaesjr@forp.usp.br).

Vula Papalexiou is a professor in the Department of Biological Sciences and Health, Pontifical Catholic University of Paraná, Curitiba, Paraná, Brazil.

  • Download PDF