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Abstract
AimTo evaluate the progression of an induced peri-implantitis at implants with different diameters and the outcome of a corrective surgical debridement.MethodsThree months after the extraction of the mandibular premolars and first molars in six dogs, non-submerged narrow implants (3.3 mm in diameter) or standard implants (3.8 mm and 4.1 mm) were installed in the molar regions, bilaterally. After 3 months, peri-implantitis lesions were induced with ligatures and plaque accumulation for 3 months. Plaque accumulation was allowed for a further month after ligatures removal. A surgical mechanical decontamination of the surfaces was subsequently performed using gauzes soaked in saline and irrigation. Five months after, biopsies were retrieved and histological slides prepared. X-rays were taken at treatment and 5 months after.ResultsFourth months after peri-implantitis induction, 2.2 ± 1.0 mm at the standard implants and 3.2 ± 0.4 mm at the narrow implants were observed. Five months after treatment, a mean gain of marginal bone of 0.5 ± 0.6 mm was obtained at the standard implants and of 0.9 ± 0.4 at the narrow implants (p = 0.249). The vertical and horizontal defects were found partially closed. At the histological analysis, the coronal level of osseointegration after 5 months of healing was at 2.1 ± 0.8 mm at the standard implants, and 2.8 ± 0.3 mm at narrow implants (p = 0.116).ConclusionsIn conclusion, the narrow implants showed a tendency of a faster progression of the induced peri-implantitis compared to standard implants. The implant diameter did not influence the outcome of a surgical treatment of an induced peri-implantitis.
Highlights
Peri-implantitis is a quite recurrent disease that has been reported to have a prevalence of more than 12% of the implants installed [1]
One 3.3 mm implant was lost before treatment, and the corresponding 4.25 mm was lost after treatment
Mean values obtained between the two standard and the two narrow implants yielded an n = 6
Summary
Peri-implantitis is a quite recurrent disease that has been reported to have a prevalence of more than 12% of the implants installed [1]. The diagnosis of peri-implantitis requires the presence of both bleeding on probing and progressive bone loss [2, 3]. These lesions should be treated as earlier as possible to avoid the progression of the disease [4]. A systematic review on the non-surgical treatment of peri-implant disease reported effective result on mucositis. Modest or non-predictable outcomes were reported for the treatment of peri-implantitis [5]. The surgical treatment of peri-implantitis, provided that a regular supportive care is subsequently applied, may yield
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