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/NCT06031896</url>
    </required_header>
    <id_info>
      <org_study_id>2021-116</org_study_id>
      <nct_id>NCT06031896</nct_id>
    </id_info>
    <brief_title>The Severity of Periodontitis at the Buccal and Palatal Site</brief_title>
    <official_title>The Comparison of the Severity of Periodontitis at the Buccal and Palatal Site</official_title>
    <sponsors>
      <lead_sponsor>
        <agency>The Dental Hospital of Zhejiang University School of Medicine</agency>
        <agency_class>Other</agency_class>
      </lead_sponsor>
    </sponsors>
    <source>The Dental Hospital of Zhejiang University School of Medicine</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>
        To record and compare the periodontal conditions of buccal and palatal sites in patients&#xD;
      </textblock>
    </brief_summary>
    <overall_status>Not yet recruiting</overall_status>
    <start_date type="Anticipated">October 1, 2023</start_date>
    <completion_date type="Anticipated">December 31, 2025</completion_date>
    <primary_completion_date type="Anticipated">October 1, 2024</primary_completion_date>
    <study_type>Observational</study_type>
    <has_expanded_access>No</has_expanded_access>
    <study_design_info>
      <observational_model>Case-Only</observational_model>
      <time_perspective>Retrospective</time_perspective>
    </study_design_info>
    <primary_outcome>
      <measure>probing depth</measure>
      <time_frame>3 years</time_frame>
      <description>the probing depth of buccal and palatal sites of teeth in one patient</description>
    </primary_outcome>
    <enrollment type="Anticipated">3000</enrollment>
    <condition>Periodontal Diseases</condition>
    <intervention>
      <intervention_type>Other</intervention_type>
      <intervention_name>No interventions</intervention_name>
      <description>No interventions</description>
    </intervention>
    <eligibility>
      <study_pop>
        <textblock>
          As many patients as investigators can collect&#xD;
        </textblock>
      </study_pop>
      <sampling_method>Probability Sample</sampling_method>
      <criteria>
        <textblock>
          Inclusion Criteria:&#xD;
  &#xD;
            -  patients with diagnosed periodontitis&#xD;
  &#xD;
          Exclusion Criteria:&#xD;
  &#xD;
            -  compromised systematic health (uncontrolled hypertension, diabetes, impaired bone&#xD;
               metabolism condition, etc.), uncontrolled periodontal disease, smoking &gt; 20&#xD;
               cigarettes/day or recent chemotherapy/radiotherapy in the oral and maxillofacial&#xD;
               regions&#xD;
        </textblock>
      </criteria>
      <gender>All</gender>
      <minimum_age>18 Years</minimum_age>
      <maximum_age>80 Years</maximum_age>
    </eligibility>
    <location>
      <facility>
        <name>The Affiliated Hospital of Stomatology, Zhejiang University School of Medicine</name>
        <address>
          <city>Hangzhou</city>
          <state>Zhejiang</state>
          <country>China</country>
        </address>
      </facility>
    </location>
    <location_countries>
      <country>China</country>
    </location_countries>
    <verification_date>September 2023</verification_date>
    <study_first_submitted>September 4, 2023</study_first_submitted>
    <study_first_submitted_qc>September 4, 2023</study_first_submitted_qc>
    <study_first_posted type="Actual">September 11, 2023</study_first_posted>
    <last_update_submitted>September 4, 2023</last_update_submitted>
    <last_update_submitted_qc>September 4, 2023</last_update_submitted_qc>
    <last_update_posted type="Actual">September 11, 2023</last_update_posted>
    <responsible_party>
      <responsible_party_type>Sponsor</responsible_party_type>
    </responsible_party>
    <condition_browse>
      <!-- CAUTION:  The following MeSH terms are assigned with an imperfect algorithm            -->
      <mesh_term>Periodontitis</mesh_term>
      <mesh_term>Periodontal Diseases</mesh_term>
    </condition_browse>
    <!-- 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/NCT06031896
  org study id: 2021-116
  nct id: NCT06031896
  lead sponsor: 
  is fda regulated drug: No
  is fda regulated device: No
  To record and compare the periodontal conditions of buccal and palatal sites in patients
  observational model: Case-Only
  time perspective: Retrospective
  measure: probing depth
  time frame: 3 years
  description: the probing depth of buccal and palatal sites of teeth in one patient
  intervention type: Other
  intervention name: No interventions
  description: No interventions
  study pop: 
  sampling method: Probability Sample
  criteria: 
  gender: All
  minimum age: 18 Years
  maximum age: 80 Years
  facility: 
  country: China
  responsible party type: Sponsor
  mesh term: Periodontitis
  mesh term: Periodontal Diseases