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Influence of collar design on peri‐implant tissue healing around immediate implants: A pilot study in Foxhound dogs
Author(s) -
CalvoGuirado José Luis,
LópezLópez Patricia Jara,
Maté Sánchez de val José Eduardo,
MarequeBueno Javier,
DelgadoRuiz Rafael Arcesio,
Romanos Georgios E.
Publication year - 2015
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/clr.12374
Subject(s) - collar , dentistry , implant , peri , medicine , surgery , engineering , mechanical engineering
Purpose The study aims to assess the soft tissue level ( STL ) and crestal bone level ( CBL ), of titanium dental implants with different mixed collar abutments configurations. Materials and methods This study included 48 implants with the same dimensions. They were divided into two groups of 24 implants each one: implants with a polished collar of 2 mm plus a roughened area of 0.8 mm ( CONTROL ) and implants with a polished collar of 0.8 mm plus a micro‐threated and roughened area of 2 mm ( TEST ). The implants were inserted randomly in the post‐extraction sockets of P 2 , P 3 , P 4, and M 1 bilaterally in the lower jaw of six foxhound dogs. STL and CBL were evaluated after 8 and 12 weeks by histology and histometry. Results All implants were clinically and histologically osseointegrated. Healing patterns examined microscopically at 8 and 12 weeks for both groups yielded similar qualitative findings for the STL evaluation, without significant differences between groups ( P > 0.05). CBL was significantly higher in the buccal side in comparison with the lingual side for both groups ( P < 0.05); the comparison between groups at 8 weeks showed IS ‐B (distance from the implant shoulder to the top of the bony crest) and IS ‐C (distance from the implant shoulder to the first bone‐to‐implant contact) values significantly higher for control group in comparison with test ( P < 0.05). At 12 weeks, CBL showed increased values for both groups that were higher in controls group in comparison with test ( P < 0.05). Conclusions Bony crest resorption could not be avoided both at test and control sites. However, the neck conformation at the test sites reduced the buccal bone resorption. Soft tissue dimensions were similar both at the test and control sites.