xml: <clinical_study>
    <!-- This xml conforms to an XML Schema at:
      https://clinicaltrials.gov/ct2/html/images/info/public.xsd -->
    <required_header>
      <download_date>ClinicalTrials.gov processed this data on September 20, 2023</download_date>
      <link_text>Link to the current ClinicalTrials.gov record.</link_text>
      <url>https://clinicaltrials.gov/ct2/show/NCT06006156</url>
    </required_header>
    <id_info>
      <org_study_id>UNT_short implants</org_study_id>
      <nct_id>NCT06006156</nct_id>
    </id_info>
    <brief_title>Dimensional Changes in Single Crowns Supported by Short Transmucosal Implants With Diverging or Converging Neck Profiles in the Esthetic Zone</brief_title>
    <official_title>Long-term Dimensional Changes in Single Crowns Supported by Short (6 mm) Transmucosal Implants With Divergent or Convergent Neck Profiles in the Esthetic Zone. A Randomized Randomized Controlled Clinical Trial</official_title>
    <sponsors>
      <lead_sponsor>
        <agency>ARDEC Academy</agency>
        <agency_class>Other</agency_class>
      </lead_sponsor>
      <collaborator>
        <agency>Universidad Nacional de Trujillo</agency>
        <agency_class>Other</agency_class>
      </collaborator>
    </sponsors>
    <source>ARDEC Academy</source>
    <oversight_info>
      <is_fda_regulated_drug>No</is_fda_regulated_drug>
      <is_fda_regulated_device>No</is_fda_regulated_device>
    </oversight_info>
    <brief_summary>
      <textblock>
        The goal of the present randomized clinical trial is to assess the long-term osseous and&#xD;
        peri-implant soft tissue changes as well as the success rate of short implants (6 mm) with a&#xD;
        converging collar with micro threads or a diverging polished collar placed in the esthetic&#xD;
        zone of the maxilla on partially edentulous patients. The main questions it aims to answer&#xD;
        are:&#xD;
  &#xD;
          -  what are the long-term bone and soft tissue changes around implants with a converging&#xD;
             collar with micro threads compared to a diverging polished collar placed in the esthetic&#xD;
             zone of the maxilla?&#xD;
  &#xD;
          -  What is the success rate of implants with a converging collar with micro threads&#xD;
             compared to a diverging polished collar placed in the esthetic zone of the maxilla?&#xD;
             Dental implants with a converging collar with micro threads or a diverging polished&#xD;
             collar will be placed in the esthetic zone of the maxilla of the included participants&#xD;
             and the measurements regarding the bone and soft tissue level will be compared.&#xD;
      </textblock>
    </brief_summary>
    <detailed_description>
      <textblock>
        The objectives of the present randomized clinical trial are to evaluate the clinical and&#xD;
        radiographic changes over time of hard and soft tissues around implants with a convergent or&#xD;
        divergent collar. Twenty volunteer participants with two edentulous regions in the maxillary&#xD;
        esthetic zone (from the right second premolar to the left second premolar) will be included&#xD;
        in the study. Two implants will be randomly installed, one with a convergent collar and one&#xD;
        with a divergent collar. After 3 months of healing, individual crowns will be installed. At&#xD;
        each visit the following parameters will be evaluated: plaque index, probing depth, bleeding&#xD;
        on probing, the recession of the mucosal margin, intraoral radiographs, likewise control&#xD;
        CBCT, and impressions will be performed. The visit will take place at 6 and 12 months and&#xD;
        then annually for a minimum of 3 years. Changes at the level of the marginal bone will be&#xD;
        assessed overtime on the radiographs. Dimensional changes will be clinically evaluated during&#xD;
        control evaluations and later through digital impressions.&#xD;
      </textblock>
    </detailed_description>
    <overall_status>Recruiting</overall_status>
    <start_date type="Actual">April 1, 2023</start_date>
    <completion_date type="Anticipated">December 30, 2026</completion_date>
    <primary_completion_date type="Anticipated">December 30, 2023</primary_completion_date>
    <phase>N/A</phase>
    <study_type>Interventional</study_type>
    <has_expanded_access>No</has_expanded_access>
    <study_design_info>
      <allocation>Randomized</allocation>
      <intervention_model>Parallel Assignment</intervention_model>
      <intervention_model_description>The study is a split-mouth randomized controlled trial. One implant with a converging collar with micro threads or a diverging polished collar will be installed in each patient according to randomization in the esthetic region of the upper jaw ( between the second premolars ). It will be restored with individual crowns after three months of healing. Both implants will be placed with the rough margin of ~1 mm subcrestally.</intervention_model_description>
      <primary_purpose>Treatment</primary_purpose>
      <masking>Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)</masking>
      <masking_description>Treatment assignments will be sealed in opaque envelopes that will be opened during the surgery. The treatment assignment will be disclosed to the surgeon after the elevation of the alveolar mucosal flaps and prior to the preparation of the recipient sites.</masking_description>
    </study_design_info>
    <primary_outcome>
      <measure>height of the periimplant bone tissues</measure>
      <time_frame>baseline</time_frame>
      <description>The height of the periimplant bone tissues will be evaluated in the intraoral radiographic images, cone beam tomography, and the three-dimensional images obtained from the digital prints</description>
    </primary_outcome>
    <primary_outcome>
      <measure>height of the periimplant bone tissues</measure>
      <time_frame>3 years follow up</time_frame>
      <description>The height of the periimplant bone tissues will be evaluated in the intraoral radiographic images, cone beam tomography, and the three-dimensional images obtained from the digital prints</description>
    </primary_outcome>
    <primary_outcome>
      <measure>height of the periimplant soft tissues</measure>
      <time_frame>Baseline</time_frame>
      <description>The height of the periimplant soft tissues will be evaluated in the intraoral radiographic images, cone beam tomography, and the three-dimensional images obtained from the digital prints</description>
    </primary_outcome>
    <primary_outcome>
      <measure>height of the periimplant soft tissues</measure>
      <time_frame>3 years follow up</time_frame>
      <description>The height of the periimplant soft tissues will be evaluated in the intraoral radiographic images, cone beam tomography, and the three-dimensional images obtained from the digital prints</description>
    </primary_outcome>
    <secondary_outcome>
      <measure>Plaque index</measure>
      <time_frame>1 year</time_frame>
      <description>to score the plaque accumulation of plaque around implants will be used the Mombelli et al index</description>
    </secondary_outcome>
    <secondary_outcome>
      <measure>Plaque index</measure>
      <time_frame>3 year</time_frame>
      <description>to score the plaque accumulation of plaque around implants will be used the Mombelli et al index</description>
    </secondary_outcome>
    <secondary_outcome>
      <measure>Bleeding on probing</measure>
      <time_frame>1 year</time_frame>
      <description>During the probing, the bleeding on probing will be registered in the periodontal record.</description>
    </secondary_outcome>
    <secondary_outcome>
      <measure>Bleeding on probing</measure>
      <time_frame>3 year</time_frame>
      <description>During the probing, the bleeding on probing will be registered in the periodontal record.</description>
    </secondary_outcome>
    <secondary_outcome>
      <measure>Probing depth</measure>
      <time_frame>1 year</time_frame>
      <description>A calibrated probe will be used to measure the probing depth in all teeth annually.</description>
    </secondary_outcome>
    <secondary_outcome>
      <measure>Probing depth</measure>
      <time_frame>3 year</time_frame>
      <description>A calibrated probe will be used to measure the probing depth in all teeth annually.</description>
    </secondary_outcome>
    <secondary_outcome>
      <measure>Implant success rate</measure>
      <time_frame>1 year</time_frame>
      <description>The criteria to evaluate the success rate will be if there was no persistent and/or irreversible signs or symptoms such as pain, infection, neuropathies, or paresthesia, no peri-implant infection with suppuration, no mobility, and no continuous radiolucency around the implant.</description>
    </secondary_outcome>
    <secondary_outcome>
      <measure>Implant success rate</measure>
      <time_frame>3 years</time_frame>
      <description>The criteria to evaluate the success rate will be if there was no persistent and/or irreversible signs or symptoms such as pain, infection, neuropathies, or paresthesia, no peri-implant infection with suppuration, no mobility, and no continuous radiolucency around the implant.</description>
    </secondary_outcome>
    <number_of_arms>2</number_of_arms>
    <enrollment type="Anticipated">20</enrollment>
    <condition>Edentulous Alveolar Ridge</condition>
    <arm_group>
      <arm_group_label>dental implant with a convergent collar</arm_group_label>
      <arm_group_type>Experimental</arm_group_type>
      <description>One implant with a converging collar with micro threads will be installed in each patient according to the site randomization in the esthetic region of the upper jaw (between the second premolars).</description>
    </arm_group>
    <arm_group>
      <arm_group_label>dental implant with a divergent collar</arm_group_label>
      <arm_group_type>Active Comparator</arm_group_type>
      <description>One implant with a diverging polished collar will be installed in each patient according to the site randomization in the esthetic region of the upper jaw ( between the second premolars).</description>
    </arm_group>
    <intervention>
      <intervention_type>Procedure</intervention_type>
      <intervention_name>Dental implants placement</intervention_name>
      <description>Two one-piece trans gingival implants, One with a convergent hyperbolic collar, and one with a divergent profile collar will be used.</description>
      <arm_group_label>dental implant with a convergent collar</arm_group_label>
      <arm_group_label>dental implant with a divergent collar</arm_group_label>
      <other_name>dental implant installation</other_name>
      <other_name>implant supported prosthetic restoration</other_name>
    </intervention>
    <eligibility>
      <criteria>
        <textblock>
          Inclusion Criteria:&#xD;
  &#xD;
            -  Presence of at least two edentulous areas in the esthetic region of the maxilla (from&#xD;
               right to left from second premolar to premolar, preferably first premolars and&#xD;
               incisors)&#xD;
  &#xD;
            -  Alveolar bone ≥ 8 mm in height and ≥ 5 mm in thickness assessed on CBCT.&#xD;
  &#xD;
            -  Age of ≥ 21 years.&#xD;
  &#xD;
            -  Need for an implant-supported prosthetic restoration.&#xD;
  &#xD;
            -  Be in good general health with no contraindications to oral surgical procedures.&#xD;
  &#xD;
            -  Not be pregnant.&#xD;
  &#xD;
            -  Patients who agree to participate in the study and sign the informed consent.&#xD;
  &#xD;
          Exclusion Criteria:&#xD;
  &#xD;
            -  The presence of any uncontrolled systemic disease.&#xD;
  &#xD;
            -  History of past or ongoing chemotherapeutic or radiotherapeutic treatments.&#xD;
  &#xD;
            -  Heavy smokers (&gt;10 cigarettes per day).&#xD;
  &#xD;
            -  Previous bone regeneration procedures in the area of interest&#xD;
        </textblock>
      </criteria>
      <gender>All</gender>
      <minimum_age>21 Years</minimum_age>
      <maximum_age>60 Years</maximum_age>
      <healthy_volunteers>Accepts Healthy Volunteers</healthy_volunteers>
    </eligibility>
    <overall_contact>
      <last_name>Daniele Botticelli, PhD</last_name>
      <phone>+393339070450</phone>
      <email>daniele.botticelli@gmail.com</email>
    </overall_contact>
    <overall_contact_backup>
      <last_name>Karol Ali Apaza alccayhuaman, PhD</last_name>
      <phone>+436769178911</phone>
      <email>karol.ali.apazaa@gmail.com</email>
    </overall_contact_backup>
    <location>
      <facility>
        <name>Universidad Nacional de Trujillo</name>
        <address>
          <city>Trujillo</city>
          <state>La Libertad</state>
          <zip>13001</zip>
          <country>Peru</country>
        </address>
      </facility>
      <status>Recruiting</status>
      <contact>
        <last_name>Miguel Ccarhuayo Matta, PhD</last_name>
        <phone>+51949434377</phone>
        <email>miguelcarhuayo@icloud.com</email>
      </contact>
    </location>
    <location_countries>
      <country>Peru</country>
    </location_countries>
    <results_reference>
      <citation>Agustin-Panadero R, Martinez-Martinez N, Fernandez-Estevan L, Faus-Lopez J, Sola-Ruiz MF. Influence of Transmucosal Area Morphology on Peri-Implant Bone Loss in Tissue-Level Implants. Int J Oral Maxillofac Implants. 2019 July/August;(34):947-952. doi: 10.11607/jomi.7329. Epub 2019 Feb 15.</citation>
      <PMID>30768662</PMID>
    </results_reference>
    <results_reference>
      <citation>Altaib FH, Alqutaibi AY, Al-Fahd A, Eid S. Short dental implant as alternative to long implant with bone augmentation of the atrophic posterior ridge: a systematic review and meta-analysis of RCTs. Quintessence Int. 2019;50(8):636-650. doi: 10.3290/j.qi.a42948.</citation>
      <PMID>31372602</PMID>
    </results_reference>
    <results_reference>
      <citation>Bitaraf T, Keshtkar A, Rokn AR, Monzavi A, Geramy A, Hashemi K. Comparing short dental implant and standard dental implant in terms of marginal bone level changes: A systematic review and meta-analysis of randomized controlled trials. Clin Implant Dent Relat Res. 2019 Aug;21(4):796-812. doi: 10.1111/cid.12774. Epub 2019 May 1.</citation>
      <PMID>31044538</PMID>
    </results_reference>
    <results_reference>
      <citation>Buser D, Ingimarsson S, Dula K, Lussi A, Hirt HP, Belser UC. Long-term stability of osseointegrated implants in augmented bone: a 5-year prospective study in partially edentulous patients. Int J Periodontics Restorative Dent. 2002 Apr;22(2):109-17.</citation>
      <PMID>12019706</PMID>
    </results_reference>
    <results_reference>
      <citation>Caneva M, Lang NP, Calvo Guirado JL, Spriano S, Iezzi G, Botticelli D. Bone healing at bicortically installed implants with different surface configurations. An experimental study in rabbits. Clin Oral Implants Res. 2015 Mar;26(3):293-9. doi: 10.1111/clr.12475. Epub 2014 Sep 15.</citation>
      <PMID>25220835</PMID>
    </results_reference>
    <results_reference>
      <citation>Doyle AD, Wang FW, Matsumoto K, Yamada KM. One-dimensional topography underlies three-dimensional fibrillar cell migration. J Cell Biol. 2009 Feb 23;184(4):481-90. doi: 10.1083/jcb.200810041. Epub 2009 Feb 16.</citation>
      <PMID>19221195</PMID>
    </results_reference>
    <results_reference>
      <citation>Hermann JS, Jones AA, Bakaeen LG, Buser D, Schoolfield JD, Cochran DL. Influence of a machined collar on crestal bone changes around titanium implants: a histometric study in the canine mandible. J Periodontol. 2011 Sep;82(9):1329-38. doi: 10.1902/jop.2011.090728. Epub 2011 Apr 12.</citation>
      <PMID>21486176</PMID>
    </results_reference>
    <results_reference>
      <citation>Papaspyridakos P, De Souza A, Vazouras K, Gholami H, Pagni S, Weber HP. Survival rates of short dental implants (&lt;/=6 mm) compared with implants longer than 6 mm in posterior jaw areas: A meta-analysis. Clin Oral Implants Res. 2018 Oct;29 Suppl 16:8-20. doi: 10.1111/clr.13289.</citation>
      <PMID>30328206</PMID>
    </results_reference>
    <results_reference>
      <citation>Ravida A, Majzoub J, Alassadi M, Saleh MH, Askar H, Wang HL. Impact of Implant Length on Survival of Rough-Surface Implants in Nonaugmented Posterior Areas: A Systematic Review and Meta-Regression Analysis. Int J Oral Maxillofac Implants. 2019 Nov/Dec;34(6):1359-1369. doi: 10.11607/jomi.7509.</citation>
      <PMID>31711077</PMID>
    </results_reference>
    <results_reference>
      <citation>Ravida A, Wang IC, Sammartino G, Barootchi S, Tattan M, Troiano G, Laino L, Marenzi G, Covani U, Wang HL. Prosthetic Rehabilitation of the Posterior Atrophic Maxilla, Short (&lt;/=6 mm) or Long (&gt;/=10 mm) Dental Implants? A Systematic Review, Meta-analysis, and Trial Sequential Analysis: Naples Consensus Report Working Group A. Implant Dent. 2019 Dec;28(6):590-602. doi: 10.1097/ID.0000000000000919.</citation>
      <PMID>31274666</PMID>
    </results_reference>
    <results_reference>
      <citation>Rodriguez X, Navajas A, Vela X, Fortuno A, Jimenez J, Nevins M. Arrangement of Peri-implant Connective Tissue Fibers Around Platform-Switching Implants with Conical Abutments and Its Relationship to the Underlying Bone: A Human Histologic Study. Int J Periodontics Restorative Dent. 2016 Jul-Aug;36(4):533-40. doi: 10.11607/prd.2580.</citation>
      <PMID>27333011</PMID>
    </results_reference>
    <results_reference>
      <citation>Rossi F, Botticelli D, Cesaretti G, De Santis E, Storelli S, Lang NP. Use of short implants (6 mm) in a single-tooth replacement: a 5-year follow-up prospective randomized controlled multicenter clinical study. Clin Oral Implants Res. 2016 Apr;27(4):458-64. doi: 10.1111/clr.12564. Epub 2015 Feb 18.</citation>
      <PMID>25692556</PMID>
    </results_reference>
    <results_reference>
      <citation>Rossi F, Lang NP, Ricci E, Ferraioli L, Baldi N, Botticelli D. Long-term follow-up of single crowns supported by short, moderately rough implants-A prospective 10-year cohort study. Clin Oral Implants Res. 2018 Dec;29(12):1212-1219. doi: 10.1111/clr.13386. Epub 2018 Dec 6.</citation>
      <PMID>30430655</PMID>
    </results_reference>
    <results_reference>
      <citation>Rossi F, Lang NP, Ricci E, Ferraioli L, Marchetti C, Botticelli D. 6-mm-long implants loaded with fiber-reinforced composite resin-bonded fixed prostheses (FRCRBFDPs). A 5-year prospective study. Clin Oral Implants Res. 2017 Dec;28(12):1478-1483. doi: 10.1111/clr.13015. Epub 2017 Mar 28.</citation>
      <PMID>28370406</PMID>
    </results_reference>
    <results_reference>
      <citation>Storelli S, Abba A, Scanferla M, Botticelli D, Romeo E. 6 mm vs 10 mm-long implants in the rehabilitation of posterior jaws: A 10-year follow-up of a randomised controlled trial. Eur J Oral Implantol. 2018;11(3):283-292.</citation>
      <PMID>30246182</PMID>
    </results_reference>
    <results_reference>
      <citation>Szathvary I, Caneva M, Caneva M, Bressan E, Botticelli D, Meneghello R. A volumetric 3-D digital analysis of dimensional changes to the alveolar process at implants placed immediately into extraction sockets. J Oral Science Rehabilitation. 2015 Sep;1(1):62-9.</citation>
    </results_reference>
    <results_reference>
      <citation>Welander M, Abrahamsson I, Berglundh T. Subcrestal placement of two-part implants. Clin Oral Implants Res. 2009 Mar;20(3):226-31. doi: 10.1111/j.1600-0501.2008.01637.x.</citation>
      <PMID>19397633</PMID>
    </results_reference>
    <verification_date>August 2023</verification_date>
    <study_first_submitted>April 5, 2023</study_first_submitted>
    <study_first_submitted_qc>August 18, 2023</study_first_submitted_qc>
    <study_first_posted type="Actual">August 23, 2023</study_first_posted>
    <last_update_submitted>August 18, 2023</last_update_submitted>
    <last_update_submitted_qc>August 18, 2023</last_update_submitted_qc>
    <last_update_posted type="Actual">August 23, 2023</last_update_posted>
    <responsible_party>
      <responsible_party_type>Sponsor</responsible_party_type>
    </responsible_party>
    <keyword>Maxilla</keyword>
    <keyword>Partially edentulous</keyword>
    <keyword>Dental implant</keyword>
    <keyword>Implant supported prosthesis</keyword>
    <condition_browse>
      <!-- CAUTION:  The following MeSH terms are assigned with an imperfect algorithm            -->
      <mesh_term>Mouth, Edentulous</mesh_term>
    </condition_browse>
    <patient_data>
      <sharing_ipd>No</sharing_ipd>
    </patient_data>
    <provided_document_section>
      <provided_document>
        <document_type>Study Protocol</document_type>
        <document_has_protocol>Yes</document_has_protocol>
        <document_has_icf>No</document_has_icf>
        <document_has_sap>No</document_has_sap>
        <document_date>January 1, 2023</document_date>
        <document_url>https://ClinicalTrials.gov/ProvidedDocs/56/NCT06006156/Prot_000.pdf</document_url>
      </provided_document>
    </provided_document_section>
    <!-- Results have not yet been posted for this study                                          -->
  </clinical_study>
  
  
text: download date: ClinicalTrials.gov processed this data on September 20, 2023
  link text: Link to the current ClinicalTrials.gov record.
  url: https://clinicaltrials.gov/ct2/show/NCT06006156
  org study id: UNT_short implants
  nct id: NCT06006156
  lead sponsor: 
  collaborator: 
  is fda regulated drug: No
  is fda regulated device: No
  The goal of the present randomized clinical trial is to assess the long-term osseous and
        peri-implant soft tissue changes as well as the success rate of short implants (6 mm) with a
        converging collar with micro threads or a diverging polished collar placed in the esthetic
        zone of the maxilla on partially edentulous patients. The main questions it aims to answer
        are:
  
          -  what are the long-term bone and soft tissue changes around implants with a converging
             collar with micro threads compared to a diverging polished collar placed in the esthetic
             zone of the maxilla?
  
          -  What is the success rate of implants with a converging collar with micro threads
             compared to a diverging polished collar placed in the esthetic zone of the maxilla?
             Dental implants with a converging collar with micro threads or a diverging polished
             collar will be placed in the esthetic zone of the maxilla of the included participants
             and the measurements regarding the bone and soft tissue level will be compared.
  The objectives of the present randomized clinical trial are to evaluate the clinical and
        radiographic changes over time of hard and soft tissues around implants with a convergent or
        divergent collar. Twenty volunteer participants with two edentulous regions in the maxillary
        esthetic zone (from the right second premolar to the left second premolar) will be included
        in the study. Two implants will be randomly installed, one with a convergent collar and one
        with a divergent collar. After 3 months of healing, individual crowns will be installed. At
        each visit the following parameters will be evaluated: plaque index, probing depth, bleeding
        on probing, the recession of the mucosal margin, intraoral radiographs, likewise control
        CBCT, and impressions will be performed. The visit will take place at 6 and 12 months and
        then annually for a minimum of 3 years. Changes at the level of the marginal bone will be
        assessed overtime on the radiographs. Dimensional changes will be clinically evaluated during
        control evaluations and later through digital impressions.
  allocation: Randomized
  intervention model: Parallel Assignment
  intervention model description: The study is a split-mouth randomized controlled trial. One implant with a converging collar with micro threads or a diverging polished collar will be installed in each patient according to randomization in the esthetic region of the upper jaw ( between the second premolars ). It will be restored with individual crowns after three months of healing. Both implants will be placed with the rough margin of ~1 mm subcrestally.
  primary purpose: Treatment
  masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
  masking description: Treatment assignments will be sealed in opaque envelopes that will be opened during the surgery. The treatment assignment will be disclosed to the surgeon after the elevation of the alveolar mucosal flaps and prior to the preparation of the recipient sites.
  measure: height of the periimplant bone tissues
  time frame: baseline
  description: The height of the periimplant bone tissues will be evaluated in the intraoral radiographic images, cone beam tomography, and the three-dimensional images obtained from the digital prints
  measure: height of the periimplant bone tissues
  time frame: 3 years follow up
  description: The height of the periimplant bone tissues will be evaluated in the intraoral radiographic images, cone beam tomography, and the three-dimensional images obtained from the digital prints
  measure: height of the periimplant soft tissues
  time frame: Baseline
  description: The height of the periimplant soft tissues will be evaluated in the intraoral radiographic images, cone beam tomography, and the three-dimensional images obtained from the digital prints
  measure: height of the periimplant soft tissues
  time frame: 3 years follow up
  description: The height of the periimplant soft tissues will be evaluated in the intraoral radiographic images, cone beam tomography, and the three-dimensional images obtained from the digital prints
  measure: Plaque index
  time frame: 1 year
  description: to score the plaque accumulation of plaque around implants will be used the Mombelli et al index
  measure: Plaque index
  time frame: 3 year
  description: to score the plaque accumulation of plaque around implants will be used the Mombelli et al index
  measure: Bleeding on probing
  time frame: 1 year
  description: During the probing, the bleeding on probing will be registered in the periodontal record.
  measure: Bleeding on probing
  time frame: 3 year
  description: During the probing, the bleeding on probing will be registered in the periodontal record.
  measure: Probing depth
  time frame: 1 year
  description: A calibrated probe will be used to measure the probing depth in all teeth annually.
  measure: Probing depth
  time frame: 3 year
  description: A calibrated probe will be used to measure the probing depth in all teeth annually.
  measure: Implant success rate
  time frame: 1 year
  description: The criteria to evaluate the success rate will be if there was no persistent and/or irreversible signs or symptoms such as pain, infection, neuropathies, or paresthesia, no peri-implant infection with suppuration, no mobility, and no continuous radiolucency around the implant.
  measure: Implant success rate
  time frame: 3 years
  description: The criteria to evaluate the success rate will be if there was no persistent and/or irreversible signs or symptoms such as pain, infection, neuropathies, or paresthesia, no peri-implant infection with suppuration, no mobility, and no continuous radiolucency around the implant.
  arm group label: dental implant with a convergent collar
  arm group type: Experimental
  description: One implant with a converging collar with micro threads will be installed in each patient according to the site randomization in the esthetic region of the upper jaw (between the second premolars).
  arm group label: dental implant with a divergent collar
  arm group type: Active Comparator
  description: One implant with a diverging polished collar will be installed in each patient according to the site randomization in the esthetic region of the upper jaw ( between the second premolars).
  intervention type: Procedure
  intervention name: Dental implants placement
  description: Two one-piece trans gingival implants, One with a convergent hyperbolic collar, and one with a divergent profile collar will be used.
  arm group label: dental implant with a convergent collar
  arm group label: dental implant with a divergent collar
  other name: dental implant installation
  other name: implant supported prosthetic restoration
  criteria: 
  gender: All
  minimum age: 21 Years
  maximum age: 60 Years
  healthy volunteers: Accepts Healthy Volunteers
  last name: Daniele Botticelli, PhD
  phone: +393339070450
  email: daniele.botticelli@gmail.com
  last name: Karol Ali Apaza alccayhuaman, PhD
  phone: +436769178911
  email: karol.ali.apazaa@gmail.com
  facility: 
  status: Recruiting
  contact: 
  country: Peru
  citation: Agustin-Panadero R, Martinez-Martinez N, Fernandez-Estevan L, Faus-Lopez J, Sola-Ruiz MF. Influence of Transmucosal Area Morphology on Peri-Implant Bone Loss in Tissue-Level Implants. Int J Oral Maxillofac Implants. 2019 July/August;(34):947-952. doi: 10.11607/jomi.7329. Epub 2019 Feb 15.
  PMID: 30768662
  citation: Altaib FH, Alqutaibi AY, Al-Fahd A, Eid S. Short dental implant as alternative to long implant with bone augmentation of the atrophic posterior ridge: a systematic review and meta-analysis of RCTs. Quintessence Int. 2019;50(8):636-650. doi: 10.3290/j.qi.a42948.
  PMID: 31372602
  citation: Bitaraf T, Keshtkar A, Rokn AR, Monzavi A, Geramy A, Hashemi K. Comparing short dental implant and standard dental implant in terms of marginal bone level changes: A systematic review and meta-analysis of randomized controlled trials. Clin Implant Dent Relat Res. 2019 Aug;21(4):796-812. doi: 10.1111/cid.12774. Epub 2019 May 1.
  PMID: 31044538
  citation: Buser D, Ingimarsson S, Dula K, Lussi A, Hirt HP, Belser UC. Long-term stability of osseointegrated implants in augmented bone: a 5-year prospective study in partially edentulous patients. Int J Periodontics Restorative Dent. 2002 Apr;22(2):109-17.
  PMID: 12019706
  citation: Caneva M, Lang NP, Calvo Guirado JL, Spriano S, Iezzi G, Botticelli D. Bone healing at bicortically installed implants with different surface configurations. An experimental study in rabbits. Clin Oral Implants Res. 2015 Mar;26(3):293-9. doi: 10.1111/clr.12475. Epub 2014 Sep 15.
  PMID: 25220835
  citation: Doyle AD, Wang FW, Matsumoto K, Yamada KM. One-dimensional topography underlies three-dimensional fibrillar cell migration. J Cell Biol. 2009 Feb 23;184(4):481-90. doi: 10.1083/jcb.200810041. Epub 2009 Feb 16.
  PMID: 19221195
  citation: Hermann JS, Jones AA, Bakaeen LG, Buser D, Schoolfield JD, Cochran DL. Influence of a machined collar on crestal bone changes around titanium implants: a histometric study in the canine mandible. J Periodontol. 2011 Sep;82(9):1329-38. doi: 10.1902/jop.2011.090728. Epub 2011 Apr 12.
  PMID: 21486176
  citation: Papaspyridakos P, De Souza A, Vazouras K, Gholami H, Pagni S, Weber HP. Survival rates of short dental implants (</=6 mm) compared with implants longer than 6 mm in posterior jaw areas: A meta-analysis. Clin Oral Implants Res. 2018 Oct;29 Suppl 16:8-20. doi: 10.1111/clr.13289.
  PMID: 30328206
  citation: Ravida A, Majzoub J, Alassadi M, Saleh MH, Askar H, Wang HL. Impact of Implant Length on Survival of Rough-Surface Implants in Nonaugmented Posterior Areas: A Systematic Review and Meta-Regression Analysis. Int J Oral Maxillofac Implants. 2019 Nov/Dec;34(6):1359-1369. doi: 10.11607/jomi.7509.
  PMID: 31711077
  citation: Ravida A, Wang IC, Sammartino G, Barootchi S, Tattan M, Troiano G, Laino L, Marenzi G, Covani U, Wang HL. Prosthetic Rehabilitation of the Posterior Atrophic Maxilla, Short (</=6 mm) or Long (>/=10 mm) Dental Implants? A Systematic Review, Meta-analysis, and Trial Sequential Analysis: Naples Consensus Report Working Group A. Implant Dent. 2019 Dec;28(6):590-602. doi: 10.1097/ID.0000000000000919.
  PMID: 31274666
  citation: Rodriguez X, Navajas A, Vela X, Fortuno A, Jimenez J, Nevins M. Arrangement of Peri-implant Connective Tissue Fibers Around Platform-Switching Implants with Conical Abutments and Its Relationship to the Underlying Bone: A Human Histologic Study. Int J Periodontics Restorative Dent. 2016 Jul-Aug;36(4):533-40. doi: 10.11607/prd.2580.
  PMID: 27333011
  citation: Rossi F, Botticelli D, Cesaretti G, De Santis E, Storelli S, Lang NP. Use of short implants (6 mm) in a single-tooth replacement: a 5-year follow-up prospective randomized controlled multicenter clinical study. Clin Oral Implants Res. 2016 Apr;27(4):458-64. doi: 10.1111/clr.12564. Epub 2015 Feb 18.
  PMID: 25692556
  citation: Rossi F, Lang NP, Ricci E, Ferraioli L, Baldi N, Botticelli D. Long-term follow-up of single crowns supported by short, moderately rough implants-A prospective 10-year cohort study. Clin Oral Implants Res. 2018 Dec;29(12):1212-1219. doi: 10.1111/clr.13386. Epub 2018 Dec 6.
  PMID: 30430655
  citation: Rossi F, Lang NP, Ricci E, Ferraioli L, Marchetti C, Botticelli D. 6-mm-long implants loaded with fiber-reinforced composite resin-bonded fixed prostheses (FRCRBFDPs). A 5-year prospective study. Clin Oral Implants Res. 2017 Dec;28(12):1478-1483. doi: 10.1111/clr.13015. Epub 2017 Mar 28.
  PMID: 28370406
  citation: Storelli S, Abba A, Scanferla M, Botticelli D, Romeo E. 6 mm vs 10 mm-long implants in the rehabilitation of posterior jaws: A 10-year follow-up of a randomised controlled trial. Eur J Oral Implantol. 2018;11(3):283-292.
  PMID: 30246182
  citation: Szathvary I, Caneva M, Caneva M, Bressan E, Botticelli D, Meneghello R. A volumetric 3-D digital analysis of dimensional changes to the alveolar process at implants placed immediately into extraction sockets. J Oral Science Rehabilitation. 2015 Sep;1(1):62-9.
  citation: Welander M, Abrahamsson I, Berglundh T. Subcrestal placement of two-part implants. Clin Oral Implants Res. 2009 Mar;20(3):226-31. doi: 10.1111/j.1600-0501.2008.01637.x.
  PMID: 19397633
  responsible party type: Sponsor
  mesh term: Mouth, Edentulous
  sharing ipd: No
  provided document: 