<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1646-2890</journal-id>
<journal-title><![CDATA[Revista Portuguesa de Estomatologia, Medicina Dentária e Cirurgia Maxilofacial]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Port Estomatol Med Dent Cir Maxilofac]]></abbrev-journal-title>
<issn>1646-2890</issn>
<publisher>
<publisher-name><![CDATA[Sociedade Portuguesa de Estomatologia e Medicina Dentária]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1646-28902022000300134</article-id>
<article-id pub-id-type="doi">10.24873/j.rpemd.2022.10.880</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Influence of abutment and connection type on implant-abutment connection rigidity: an in vitro study]]></article-title>
<article-title xml:lang="pt"><![CDATA[Rigidez da ligação implante-pilar com diferentes tipos de conexões e pilares: estudo in vitro]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mendes]]></surname>
<given-names><![CDATA[Teresa Almeida]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vilhena]]></surname>
<given-names><![CDATA[Luís Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Portugal]]></surname>
<given-names><![CDATA[Jaime]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Caramês]]></surname>
<given-names><![CDATA[João]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramalho]]></surname>
<given-names><![CDATA[Amílcar Lopes]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lopes]]></surname>
<given-names><![CDATA[Luís Pires]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade de Lisboa Faculdade de Medicina Dentária Unidade de Investigação em Ciências Orais e Biomédicas (UICOB)]]></institution>
<addr-line><![CDATA[Lisbon ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade de Coimbra Faculdade de Ciências e Tecnologias Departamento de Engenharia Mecânica]]></institution>
<addr-line><![CDATA[Coimbra ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Engenharia Biomédica e Física da Radiação (LIBPhys) Laboratório de Instrumentação ]]></institution>
<addr-line><![CDATA[Coimbra ]]></addr-line>
<country>Portugal</country>
</aff>
<pub-date pub-type="pub">
<day>30</day>
<month>09</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>09</month>
<year>2022</year>
</pub-date>
<volume>63</volume>
<numero>3</numero>
<fpage>134</fpage>
<lpage>140</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S1646-28902022000300134&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S1646-28902022000300134&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S1646-28902022000300134&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objectives:  To evaluate the effects of the abutment material and the connection type on the implant-abutment connection rigidity.  Methods:  The study evaluated eighteen implants with three different types of connections: external-hexagon, tri-channel, and conical connection. Half of the implants were connected to titanium abutments, and the other half to zirconia abutments, forming six study groups (n=3). The implants were submitted to 1,200,000 load cycles with a force amplitude of 90 N. During load application, the implant-abutment connection rigidity was determined in each cycle. The values obtained were analyzed with the two-way ANOVA test according to the abutment and connection types.  Results:  Rigidity tended to increase during loading cycles. The abutment material did not influence rigidity (p=0.883). The external-hexagon connection presented lower rigidity than the internal connections, with statistically significant differences (p=0.013).  Conclusions:  The abutment material does not influence the implant-abutment connection&#8217;s rigidity. The external-hexagon connection proved to be less rigid and stable than the internal connections.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo  Objetivos:  Avaliar o efeito do tipo de pilar e do tipo de conexão na rigidez da ligação implante-pilar, quando o conjunto é submetido a cargas cíclicas.  Métodos:  Foram avaliados 18 implantes com três tipos diferentes de conexões: hexágono externo, tri-channel e conexão cónica. Metade dos implantes foram conectados a pilares de titânio e a outra metade a pilares de zircónia, formando 6 grupos experimentais (n=3). Os implantes foram submetidos a 1.200.000 ciclos de carga com uma amplitude de forças de 90 N. Durante a aplicação das cargas, foi calculada a rigidez da ligação implante-pilar para cada ciclo. Os valores obtidos foram analisados com o teste ANOVA de duas vias de acordo com o tipo de pilar e de conexão.  Resultados:  Verificou-se uma tendência para o aumento da rigidez ao longo dos ciclos de carga. O tipo de pilar não influenciou a rigidez (p=0,883). Quanto às conexões, o hexágono externo apresentou valores de rigidez inferiores aos verificados nas conexões internas, sendo a diferença estatisticamente significativa (p=0,013).  Conclusões:  Não se verificaram alterações na rigidez implante-pilar de acordo com o tipo de pilar. O hexágono externo demonstrou ser uma conexão menos rígida e estável comparativamente às conexões internas.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Dental implant-abutment design]]></kwd>
<kwd lng="en"><![CDATA[Dental implants]]></kwd>
<kwd lng="en"><![CDATA[Titanium]]></kwd>
<kwd lng="en"><![CDATA[Yttria-stabilized tetragonal zirconia]]></kwd>
<kwd lng="pt"><![CDATA[Pilar sobre implante]]></kwd>
<kwd lng="pt"><![CDATA[Implantes dentários]]></kwd>
<kwd lng="pt"><![CDATA[Titânio]]></kwd>
<kwd lng="pt"><![CDATA[Zircónia tetragonal estabilizada com ítrio]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hanawa]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Zirconia versus titanium in dentistry: A review]]></article-title>
<source><![CDATA[Dent Mater J]]></source>
<year>2019</year>
<volume>39</volume>
<page-range>24-36</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Stimmelmayr]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Edelhoff]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Güth]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Erdelt]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Happe]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Beuer]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Wear at the titanium - titanium and the titanium - zirconia implant - abutment interface : A comparative in vitro study]]></article-title>
<source><![CDATA[Dent Mater]]></source>
<year>2012</year>
<volume>28</volume>
<page-range>1215-20</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Naveau]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Rignon-Bret]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Wulfman]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Zirconia abutments in the anterior region: A systematic review of mechanical and esthetic outcomes]]></article-title>
<source><![CDATA[J Prosthet Dent]]></source>
<year>2019</year>
<volume>121</volume>
<page-range>775-81.e1</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nam]]></surname>
<given-names><![CDATA[RK]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[SJ]]></given-names>
</name>
<name>
<surname><![CDATA[Park]]></surname>
<given-names><![CDATA[EJ]]></given-names>
</name>
<name>
<surname><![CDATA[Kwon]]></surname>
<given-names><![CDATA[HB]]></given-names>
</name>
<name>
<surname><![CDATA[Yoon]]></surname>
<given-names><![CDATA[HI]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Three-Dimensional Deformation and Wear of Internal Implant-Abutment Connection: A Comparative Biomechanical Study Using Titanium and Zirconia]]></article-title>
<source><![CDATA[Int J Oral Maxillofac Implants]]></source>
<year>2018</year>
<volume>33</volume>
<page-range>1279-86</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kofron]]></surname>
<given-names><![CDATA[MD]]></given-names>
</name>
<name>
<surname><![CDATA[Carstens]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Fu]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Wen]]></surname>
<given-names><![CDATA[HB]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[In vitro assessment of connection strength and stability of internal implant abutment connections]]></article-title>
<source><![CDATA[Clin Biomech]]></source>
<year>2019</year>
<volume>65</volume>
<page-range>92-9</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Verdugo]]></surname>
<given-names><![CDATA[CL]]></given-names>
</name>
<name>
<surname><![CDATA[Núñez]]></surname>
<given-names><![CDATA[GJ]]></given-names>
</name>
<name>
<surname><![CDATA[Avila]]></surname>
<given-names><![CDATA[AA]]></given-names>
</name>
<name>
<surname><![CDATA[San Martín]]></surname>
<given-names><![CDATA[CL]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Microleakage of the prosthetic abutment/implant interface with internal and external connection: In vitro study]]></article-title>
<source><![CDATA[Clin Oral Implants Res]]></source>
<year>2014</year>
<volume>25</volume>
<page-range>1070-83</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pardal-Peláez]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Montero]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Preload loss of abutment screws after dynamic fatigue in single implant-supported restorations. A systematic review]]></article-title>
<source><![CDATA[J Clin Exp Dent]]></source>
<year>2017</year>
<volume>9</volume>
<page-range>e1355-61</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bédouin]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Lefrançois]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Salomon]]></surname>
<given-names><![CDATA[JP]]></given-names>
</name>
<name>
<surname><![CDATA[Auroy]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Abutment rotational freedom on five implant systems with diferente internal connections]]></article-title>
<source><![CDATA[J Prosthet Dent]]></source>
<year>2021</year>
<volume>S0022-3913</volume>
<numero>21</numero>
<issue>21</issue>
<page-range>00266-3</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yao]]></surname>
<given-names><![CDATA[KT]]></given-names>
</name>
<name>
<surname><![CDATA[Kao]]></surname>
<given-names><![CDATA[HC]]></given-names>
</name>
<name>
<surname><![CDATA[Cheng]]></surname>
<given-names><![CDATA[CK]]></given-names>
</name>
<name>
<surname><![CDATA[Fang]]></surname>
<given-names><![CDATA[H-W]]></given-names>
</name>
<name>
<surname><![CDATA[Huang]]></surname>
<given-names><![CDATA[CH]]></given-names>
</name>
<name>
<surname><![CDATA[Hsu]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mechanical performance of conical implant-abutment connections under different cyclic loading conditions]]></article-title>
<source><![CDATA[J Mech Behav Biomed Mater]]></source>
<year>2019</year>
<volume>90</volume>
<page-range>426-32</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lauritano]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Moreo]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Lucchese]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Viganoni]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Limongelli]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Carinci]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Impact of Implant-Abutment Connection on Clinical Outcomes and Microbial Colonization: A Narrative Review]]></article-title>
<source><![CDATA[Materials]]></source>
<year>2020</year>
<volume>13</volume>
<page-range>1131</page-range></nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rosca]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Ramalho]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Sampaio-Fernandes]]></surname>
<given-names><![CDATA[JC]]></given-names>
</name>
<name>
<surname><![CDATA[Portugal]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reparability of two different CAD/CAM polymer materials using a light-cured composite and universal adhesives]]></article-title>
<source><![CDATA[Ver Port Estomatol Med Dent Cir Maxilofac]]></source>
<year>2016</year>
<volume>57</volume>
<page-range>189-96</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chasqueira]]></surname>
<given-names><![CDATA[AF]]></given-names>
</name>
<name>
<surname><![CDATA[Arantes-Oliveira]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Portugal]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Bonding performance of simplified dental adhesives with three application protocols: an 18-month in vitro study]]></article-title>
<source><![CDATA[J Adhes Dent]]></source>
<year>2020</year>
<volume>22</volume>
<page-range>255-64</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="">
<article-title xml:lang=""><![CDATA[International Standard for Dynamic fadigue test for endosseous dental implants]]></article-title>
<source><![CDATA[ISO 14801]]></source>
<year>2007</year>
</nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gal]]></surname>
<given-names><![CDATA[JY]]></given-names>
</name>
<name>
<surname><![CDATA[Fovet]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Adib-Yadzi]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[About a synthetic saliva for in vitro studies]]></article-title>
<source><![CDATA[Talanta]]></source>
<year>2001</year>
<volume>53</volume>
<page-range>1103-15</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bicudo]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Reis]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Deus]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Reis]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Vaz]]></surname>
<given-names><![CDATA[MF]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Performance evaluation of dental implants: An experimental and numerical simulation study]]></article-title>
<source><![CDATA[Teoretical and Applied Fracture Mechanics]]></source>
<year>2016</year>
<volume>85</volume>
<page-range>74-83</page-range></nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Chen]]></surname>
<given-names><![CDATA[X]]></given-names>
</name>
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Feng]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Chen]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Studies on the performance of selective laser melting porous dental implant by finite element model simulation, fatigue testing and in vivo experiments]]></article-title>
<source><![CDATA[Proc Inst Mech Eng H]]></source>
<year>2019</year>
<volume>233</volume>
<page-range>170-80</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Raoofi]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Khademi]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Amid]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Kadkhodazadeh]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Movahhedi]]></surname>
<given-names><![CDATA[MR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comparison of the Effect of Three Abutment-implant Connections on Stress Distribution at the Internal Surface of Dental Implants: A Finite Element Analysis]]></article-title>
<source><![CDATA[J Dent Res Dent Clin Dent Prospects]]></source>
<year>2013</year>
<volume>7</volume>
<page-range>132-9</page-range></nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Takahashi]]></surname>
<given-names><![CDATA[JMFK]]></given-names>
</name>
<name>
<surname><![CDATA[Dayrell]]></surname>
<given-names><![CDATA[AC]]></given-names>
</name>
<name>
<surname><![CDATA[Consani]]></surname>
<given-names><![CDATA[RLX]]></given-names>
</name>
<name>
<surname><![CDATA[Nóbilo]]></surname>
<given-names><![CDATA[MAA]]></given-names>
</name>
<name>
<surname><![CDATA[Henriques]]></surname>
<given-names><![CDATA[GEP]]></given-names>
</name>
<name>
<surname><![CDATA[Mesquita]]></surname>
<given-names><![CDATA[MF]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Stress Evaluation of Implantrev Abutment Connections Under Different Loading Conditions: A 3D Finite Element Study]]></article-title>
<source><![CDATA[J Oral Implantol]]></source>
<year>2015</year>
<volume>41</volume>
<page-range>133-7</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chun]]></surname>
<given-names><![CDATA[HJ]]></given-names>
</name>
<name>
<surname><![CDATA[Shin]]></surname>
<given-names><![CDATA[HS]]></given-names>
</name>
<name>
<surname><![CDATA[Han]]></surname>
<given-names><![CDATA[CH]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[SH]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Influence of implant abutment type on stress distribution in bone under various loading conditions using finite element analysis]]></article-title>
<source><![CDATA[Int J Oral Maxillofac Implants]]></source>
<year>2006</year>
<volume>21</volume>
<page-range>195-202</page-range></nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[KY]]></given-names>
</name>
<name>
<surname><![CDATA[Shin]]></surname>
<given-names><![CDATA[KS]]></given-names>
</name>
<name>
<surname><![CDATA[Jung]]></surname>
<given-names><![CDATA[JH]]></given-names>
</name>
<name>
<surname><![CDATA[Cho]]></surname>
<given-names><![CDATA[HW]]></given-names>
</name>
<name>
<surname><![CDATA[Kwon]]></surname>
<given-names><![CDATA[KH]]></given-names>
</name>
<name>
<surname><![CDATA[Kim]]></surname>
<given-names><![CDATA[YL]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Clinical study on screw loosening in dental implant prostheses: a 6-year retrospective study]]></article-title>
<source><![CDATA[J Korean Assoc Oral Maxillofac Surg]]></source>
<year>2020</year>
<volume>46</volume>
<page-range>133-42</page-range></nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Esposito]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Maghaireh]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Pistilli]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Grusovin]]></surname>
<given-names><![CDATA[MG]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[ST]]></given-names>
</name>
<name>
<surname><![CDATA[Trullenque-Eriksson]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Dental implants with internal versus external connections: 5-year post-loading results from a pragmatic multicenter randomised controlled trial]]></article-title>
<source><![CDATA[Eur J Oral Implantol]]></source>
<year>2016</year>
<volume>1</volume>
<page-range>129-41</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vigolo]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Gracis]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Carboncini]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Mutinelli]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[AIOP (Italian Academy of Prosthetic Dentistry) Clinical Research Group. Internal- vs External-Connection Single Implants: A Retrospective Study in an Italian Population Treated by Certified Prosthodontists]]></article-title>
<source><![CDATA[Int J Oral Maxillofac Implants]]></source>
<year>2016</year>
<volume>31</volume>
<page-range>1385-96</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cannata]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Grandi]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Samarani]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Svezia]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Grandi]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A comparison of two implants with conical vs internal hex connections: 1-year post-loading results from a multicentre, randomised controlled trial]]></article-title>
<source><![CDATA[EurJ Oral Implantol]]></source>
<year>2017</year>
<volume>10</volume>
<page-range>161-8</page-range></nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alikhasi]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Monzavi]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Bassir]]></surname>
<given-names><![CDATA[SH]]></given-names>
</name>
<name>
<surname><![CDATA[Naini]]></surname>
<given-names><![CDATA[RB]]></given-names>
</name>
<name>
<surname><![CDATA[Khosronedjad]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Keshavarz]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A comparison of precision of fit, rotational freedom, and torque loss with copy-milled zirconia and prefabricated titanium abutments]]></article-title>
<source><![CDATA[Int J Oral Maxillofac Implants]]></source>
<year>2013</year>
<volume>28</volume>
<page-range>996-1002</page-range></nlm-citation>
</ref>
<ref id="B25">
<label>25</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Karl]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Taylor]]></surname>
<given-names><![CDATA[TD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Parameters Determining Micromotion at the Implant-Abutment Interface]]></article-title>
<source><![CDATA[Int J Oral Maxillofac Implants]]></source>
<year>2014</year>
<volume>29</volume>
<page-range>1338-47</page-range></nlm-citation>
</ref>
<ref id="B26">
<label>26</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Saidin]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Abdul Kadir]]></surname>
<given-names><![CDATA[MR]]></given-names>
</name>
<name>
<surname><![CDATA[Sulaiman]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Abu Kasim]]></surname>
<given-names><![CDATA[NH]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of different implant-abutment connections on micromotion and stress distribution: Prediction of microgap formation]]></article-title>
<source><![CDATA[J Dent]]></source>
<year>2012</year>
<volume>40</volume>
<page-range>467-74</page-range></nlm-citation>
</ref>
<ref id="B27">
<label>27</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ferrari]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Vichi]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Zarone]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Zirconia abutments and restorations: From laboratory to clinical investigations]]></article-title>
<source><![CDATA[Dent Mater]]></source>
<year>2015</year>
<volume>31</volume>
<page-range>e63-76</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
