Influence of a Machined Collar on Crestal Bone Changes Around Titanium Implants: A Histometric Study in the Canine Mandible
Identifieur interne : 004A61 ( Main/Exploration ); précédent : 004A60; suivant : 004A62Influence of a Machined Collar on Crestal Bone Changes Around Titanium Implants: A Histometric Study in the Canine Mandible
Auteurs : Joachim S. Hermann [États-Unis, Allemagne] ; Archie A. Jones [États-Unis] ; Lara G. Bakaeen [Jordanie] ; Daniel Buser [Suisse] ; John D. Schoolfield [États-Unis] ; David L. Cochran [États-Unis]Source :
- Journal of periodontology : (1970) [ 0022-3492 ] ; 2011.
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Abstract
Background: It has been shown that peri-implant crestal bone reactions are influenced by both a rough-smooth implant border in one-piece, non-submerged, as well as an interface (microgap [MG] between implant/abutment) in two-piece butt-joint, submerged and non-submerged implants being placed at different levels in relation to the crest of the bone. According to standard surgical procedures, the rough-smooth implant border for implants with a smooth collar should be aligned with the crest of the bone exhibiting a smooth collar adjacent to peri-implant soft tissues. No data, however, are available for implants exhibiting a sandblasted, large-grit and acid-etched (SLA) surface all the way to the top of a non-submerged implant. Thus, the purpose of this study is to histometrically examine crestal bone changes around machined versus SLA-surfaced implant collars in a side-by-side comparison. Methods: A total of 60 titanium implants (30 machined collars and 30 SLA collars) were randomly placed in edentulous mandibular areas of five foxhounds forming six different subgroups (implant subgroups A to F). The implants in subgroups A to C had a machined collar (control), whereas the implants in subgroups D to F were SLA-treated all the way to the top (MG level; test). Furthermore, the MGs of the implants were placed at different levels in relation to the crest of the bone: the implants in subgroups A and E were 2 mm above the crest, in subgroups C and D 1 mm above, in subgroup B 3 mm above, and in subgroup F at the bone crest level. For all implants, abutment healing screws were connected the day of surgery. These caps were loosened and immediately retightened monthly. At 6 months, animals were sacrificed and non-decalcified histology was analyzed by evaluating peri-implant crestal bone levels. Results: For implants in subgroup A, the estimated mean crestal bone loss (± SD) was -0.52 ± 0.40 mm; in subgroup B, +0.16 ± 0.40 mm (bone gain); in subgroup C, -1.28 ± 0.21 mm; in subgroup D, -0.43 ± 0.43 mm; in subgroup E, -0.03 ± 0.48 mm; and in subgroup F, -1.1 1 ± 0.27 mm. Mean bone loss for subgroup A was significantly greater than for subgroup E (P= 0.034) and bone loss for subgroup C was significantly greater than for subgroup D (P<0.001). Conclusions: Choosing a completely SLA-surfaced non-submerged implant can reduce the amount of peri-implant crestal bone loss and reduce the distance from the MG to the first bone-implant contact around unloaded implants compared to implants with a machined collar. Furthermore, a slightly exposed SLA surface during implant placement does not seem to compromise the overall hard and soft tissue integration and, in some cases, results in coronal bone formation in this canine model.
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Hermann</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Periodontics, Dental School, University of Texas Health Science Center at San Antonio</s1><s2>San Antonio, Texas</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Texas</region></placeName></affiliation><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Periodontics, University of Greifswald</s1><s2>Greifswald</s2><s3>DEU</s3><sZ>1 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>Greifswald</wicri:noRegion><wicri:noRegion>University of Greifswald</wicri:noRegion><wicri:noRegion>Greifswald</wicri:noRegion></affiliation></author><author><name sortKey="Jones, Archie A" sort="Jones, Archie A" uniqKey="Jones A" first="Archie A." last="Jones">Archie A. Jones</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Periodontics, Dental School, University of Texas Health Science Center at San Antonio</s1><s2>San Antonio, Texas</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Texas</region></placeName></affiliation></author><author><name sortKey="Bakaeen, Lara G" sort="Bakaeen, Lara G" uniqKey="Bakaeen L" first="Lara G." last="Bakaeen">Lara G. Bakaeen</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Department of Prosthodontics, University of Jordan</s1><s2>Amman</s2><s3>JOR</s3><sZ>3 aut.</sZ></inist:fA14><country>Jordanie</country><wicri:noRegion>Amman</wicri:noRegion></affiliation></author><author><name sortKey="Buser, Daniel" sort="Buser, Daniel" uniqKey="Buser D" first="Daniel" last="Buser">Daniel Buser</name><affiliation wicri:level="4"><inist:fA14 i1="04"><s1>Department of Oral Surgery and Stomatology, School of Dental Medicine, University of Bern</s1><s2>Bern</s2><s3>CHE</s3><sZ>4 aut.</sZ></inist:fA14><country>Suisse</country><placeName><settlement type="city">Berne</settlement><region type="région" nuts="3">Canton de Berne</region><settlement type="city">Berne</settlement></placeName><orgName type="university">Université de Berne</orgName></affiliation></author><author><name sortKey="Schoolfield, John D" sort="Schoolfield, John D" uniqKey="Schoolfield J" first="John D." last="Schoolfield">John D. Schoolfield</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Periodontics, Dental School, University of Texas Health Science Center at San Antonio</s1><s2>San Antonio, Texas</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Texas</region></placeName></affiliation><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Data Analysis and Management, Academic Technology Services, University of Texas Health Science Center</s1><s2>San Antonio</s2><s3>USA</s3><sZ>5 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>San Antonio</wicri:noRegion></affiliation></author><author><name sortKey="Cochran, David L" sort="Cochran, David L" uniqKey="Cochran D" first="David L." last="Cochran">David L. Cochran</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Department of Periodontics, Dental School, University of Texas Health Science Center at San Antonio</s1><s2>San Antonio, Texas</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Texas</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Journal of periodontology : (1970)</title><title level="j" type="abbreviated">J. periodontol. : (1970)</title><idno type="ISSN">0022-3492</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of periodontology : (1970)</title><title level="j" type="abbreviated">J. periodontol. : (1970)</title><idno type="ISSN">0022-3492</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Bone</term><term>Comparative study</term><term>Cuspid</term><term>Dental implant</term><term>Dentistry</term><term>Mandible</term><term>Resorption</term><term>Surface</term><term>Titanium</term><term>Treatment</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Os</term><term>Titane</term><term>Canine</term><term>Mandibule</term><term>Résorption</term><term>Etude comparative</term><term>Surface</term><term>Dentisterie</term><term>Traitement</term><term>Implant dentaire</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Titane</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Background: It has been shown that peri-implant crestal bone reactions are influenced by both a rough-smooth implant border in one-piece, non-submerged, as well as an interface (microgap [MG] between implant/abutment) in two-piece butt-joint, submerged and non-submerged implants being placed at different levels in relation to the crest of the bone. According to standard surgical procedures, the rough-smooth implant border for implants with a smooth collar should be aligned with the crest of the bone exhibiting a smooth collar adjacent to peri-implant soft tissues. No data, however, are available for implants exhibiting a sandblasted, large-grit and acid-etched (SLA) surface all the way to the top of a non-submerged implant. Thus, the purpose of this study is to histometrically examine crestal bone changes around machined versus SLA-surfaced implant collars in a side-by-side comparison. Methods: A total of 60 titanium implants (30 machined collars and 30 SLA collars) were randomly placed in edentulous mandibular areas of five foxhounds forming six different subgroups (implant subgroups A to F). The implants in subgroups A to C had a machined collar (control), whereas the implants in subgroups D to F were SLA-treated all the way to the top (MG level; test). Furthermore, the MGs of the implants were placed at different levels in relation to the crest of the bone: the implants in subgroups A and E were 2 mm above the crest, in subgroups C and D 1 mm above, in subgroup B 3 mm above, and in subgroup F at the bone crest level. For all implants, abutment healing screws were connected the day of surgery. These caps were loosened and immediately retightened monthly. At 6 months, animals were sacrificed and non-decalcified histology was analyzed by evaluating peri-implant crestal bone levels. Results: For implants in subgroup A, the estimated mean crestal bone loss (± SD) was -0.52 ± 0.40 mm; in subgroup B, +0.16 ± 0.40 mm (bone gain); in subgroup C, -1.28 ± 0.21 mm; in subgroup D, -0.43 ± 0.43 mm; in subgroup E, -0.03 ± 0.48 mm; and in subgroup F, -1.1 1 ± 0.27 mm. Mean bone loss for subgroup A was significantly greater than for subgroup E (P= 0.034) and bone loss for subgroup C was significantly greater than for subgroup D (P<0.001). Conclusions: Choosing a completely SLA-surfaced non-submerged implant can reduce the amount of peri-implant crestal bone loss and reduce the distance from the MG to the first bone-implant contact around unloaded implants compared to implants with a machined collar. Furthermore, a slightly exposed SLA surface during implant placement does not seem to compromise the overall hard and soft tissue integration and, in some cases, results in coronal bone formation in this canine model.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Jordanie</li><li>Suisse</li><li>États-Unis</li></country><region><li>Canton de Berne</li><li>Texas</li></region><settlement><li>Berne</li></settlement><orgName><li>Université de Berne</li></orgName></list><tree><country name="États-Unis"><region name="Texas"><name sortKey="Hermann, Joachim S" sort="Hermann, Joachim S" uniqKey="Hermann J" first="Joachim S." last="Hermann">Joachim S. Hermann</name></region><name sortKey="Cochran, David L" sort="Cochran, David L" uniqKey="Cochran D" first="David L." last="Cochran">David L. Cochran</name><name sortKey="Jones, Archie A" sort="Jones, Archie A" uniqKey="Jones A" first="Archie A." last="Jones">Archie A. Jones</name><name sortKey="Schoolfield, John D" sort="Schoolfield, John D" uniqKey="Schoolfield J" first="John D." last="Schoolfield">John D. Schoolfield</name><name sortKey="Schoolfield, John D" sort="Schoolfield, John D" uniqKey="Schoolfield J" first="John D." last="Schoolfield">John D. Schoolfield</name></country><country name="Allemagne"><noRegion><name sortKey="Hermann, Joachim S" sort="Hermann, Joachim S" uniqKey="Hermann J" first="Joachim S." last="Hermann">Joachim S. Hermann</name></noRegion></country><country name="Jordanie"><noRegion><name sortKey="Bakaeen, Lara G" sort="Bakaeen, Lara G" uniqKey="Bakaeen L" first="Lara G." last="Bakaeen">Lara G. Bakaeen</name></noRegion></country><country name="Suisse"><region name="Canton de Berne"><name sortKey="Buser, Daniel" sort="Buser, Daniel" uniqKey="Buser D" first="Daniel" last="Buser">Daniel Buser</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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