<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE trials [
<!ELEMENT trials (trial+)>

<!ELEMENT trial (main,contacts,countries,criteria,health_condition_code,health_condition_keyword,intervention_code,
          intervention_keyword,primary_outcome,secondary_outcome,secondary_sponsor,secondary_ids,source_support,ethics_reviews)>

<!ELEMENT main (trial_id,utrn?,reg_name,date_registration,primary_sponsor,public_title,acronym?,scientific_title,scientific_acronym?,
          date_enrolment,type_enrolment,target_size,recruitment_status,url?,study_type,study_design,phase,hc_freetext?,i_freetext?,results_actual_enrolment,results_date_completed,results_url_link,results_summary,           results_date_posted,results_date_first_publication,results_baseline_char,results_participant_flow,results_adverse_events,results_outcome_measures,results_url_protocol,results_IPD_plan, results_IPD_description)>
<!ELEMENT trial_id (#PCDATA)>
<!ELEMENT utrn (#PCDATA)>
<!ELEMENT reg_name (#PCDATA)>
<!ELEMENT date_registration (#PCDATA)><!-- dd/mm/yyyy -->
<!ELEMENT primary_sponsor (#PCDATA)>
<!ELEMENT public_title (#PCDATA)>
<!ELEMENT acronym (#PCDATA)>
<!ELEMENT scientific_title (#PCDATA)>
<!ELEMENT scientific_acronym (#PCDATA)>
<!ELEMENT date_enrolment (#PCDATA)><!-- dd/mm/yyyy -->
<!ELEMENT type_enrolment (#PCDATA)>
<!ELEMENT target_size (#PCDATA)>
<!ELEMENT recruitment_status (#PCDATA)><!-- Pending,Recruiting,Suspended,Complete,Other -->
<!ELEMENT url (#PCDATA)>
<!ELEMENT study_type (#PCDATA)><!-- interventional,observational -->
<!ELEMENT study_design (#PCDATA)>
<!ELEMENT phase (#PCDATA)>
<!ELEMENT hc_freetext (#PCDATA)>
<!ELEMENT i_freetext (#PCDATA)>
<!ELEMENT results_actual_enrolment (#PCDATA)>
<!ELEMENT results_date_completed (#PCDATA)><!-- dd/mm/yyyy -->
<!ELEMENT results_url_link (#PCDATA)>
<!ELEMENT results_summary (#PCDATA)>
<!ELEMENT results_date_posted (#PCDATA)><!-- dd/mm/yyyy -->
<!ELEMENT results_date_first_publication (#PCDATA)><!-- dd/mm/yyyy -->
<!ELEMENT results_baseline_char (#PCDATA)>
<!ELEMENT results_participant_flow (#PCDATA)>
<!ELEMENT results_adverse_events (#PCDATA)>
<!ELEMENT results_outcome_measures (#PCDATA)>
<!ELEMENT results_url_protocol (#PCDATA)>
<!ELEMENT results_IPD_plan (#PCDATA)>
<!ELEMENT results_IPD_description (#PCDATA)>


<!ELEMENT contacts (contact+)>
<!ELEMENT contact (type,firstname,middlename,lastname,address,city,country1,zip,telephone,email,affiliation)>
<!ELEMENT type (#PCDATA)><!-- Public,Scientific -->
<!ELEMENT firstname (#PCDATA)>
<!ELEMENT middlename (#PCDATA)>
<!ELEMENT lastname (#PCDATA)>
<!ELEMENT address (#PCDATA)>
<!ELEMENT city (#PCDATA)>
<!ELEMENT country1 (#PCDATA)>
<!ELEMENT zip (#PCDATA)>
<!ELEMENT telephone (#PCDATA)>
<!ELEMENT email (#PCDATA)>
<!ELEMENT affiliation (#PCDATA)>

<!ELEMENT countries (country2+)>
<!ELEMENT country2 (#PCDATA)>

<!ELEMENT criteria (inclusion_criteria,agemin,agemax,gender,exclusion_criteria)>
<!ELEMENT inclusion_criteria (#PCDATA)>
<!ELEMENT agemin (#PCDATA)>
<!ELEMENT agemax (#PCDATA)>
<!ELEMENT gender (#PCDATA)>
<!ELEMENT exclusion_criteria (#PCDATA)>

<!ELEMENT health_condition_code (hc_code+)>
<!ELEMENT hc_code (#PCDATA)>

<!ELEMENT health_condition_keyword (hc_keyword+)>
<!ELEMENT hc_keyword (#PCDATA)>

<!ELEMENT intervention_code (i_code+)>
<!ELEMENT i_code (#PCDATA)>

<!ELEMENT intervention_keyword (i_keyword+)>
<!ELEMENT i_keyword (#PCDATA)>

<!ELEMENT primary_outcome (prim_outcome+)>
<!ELEMENT prim_outcome (#PCDATA)>

<!ELEMENT secondary_outcome (sec_outcome+)>
<!ELEMENT sec_outcome (#PCDATA)>

<!ELEMENT secondary_sponsor (sponsor_name+)>
<!ELEMENT sponsor_name (#PCDATA)>

<!ELEMENT secondary_ids (secondary_id+)>
<!ELEMENT secondary_id (sec_id,issuing_authority)>
<!ELEMENT sec_id (#PCDATA)>
<!ELEMENT issuing_authority (#PCDATA)>

<!ELEMENT source_support (source_name+)>
<!ELEMENT source_name (#PCDATA)>

<!ELEMENT ethics_reviews (ethics_review+)>
<!ELEMENT ethics_review (status,approval_date,contact_name,contact_address,contact_phone,contact_email)>
<!ELEMENT status (#PCDATA)><!-- Not approved,Approved,NA -->
<!ELEMENT approval_date (#PCDATA)><!-- dd/mm/yyyy -->
<!ELEMENT contact_name (#PCDATA)>
<!ELEMENT contact_address (#PCDATA)>
<!ELEMENT contact_phone (#PCDATA)>
<!ELEMENT contact_email (#PCDATA)>
]>
<trials>
  <trial>
    <main>
      <trial_id>IRCT20170601034288N1</trial_id>
      <utrn></utrn>
      <reg_name>IRCT</reg_name>
      <date_registration>2017-12-19</date_registration>
      <primary_sponsor>Semnan University of Medical Sciences</primary_sponsor>
      <public_title>Comparison of Conventional and Laser techniques in treatment of gingival pigmentation in adults</public_title>
      <acronym></acronym>
      <scientific_title>Comparison of Conventional and CO2 laser techniques in treatment of gingival pigmentation in adults</scientific_title>
      <scientific_acronym></scientific_acronym>
      <date_enrolment>2017-12-31</date_enrolment>
      <type_enrolment>anticipated</type_enrolment>
      <target_size>15</target_size>
      <recruitment_status>Complete</recruitment_status>
      <url>https://irct.ir/trial/26230</url>
      <study_type>interventional</study_type>
      <study_design>Randomization: Not randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Supportive.</study_design>
      <phase>N/A</phase>
      <hc_freetext>Gingival pigmentation.</hc_freetext>
      <i_freetext>Intervention 1: Gingival depigmentation using CO2 laser in the left half of maxillary anterior sextant. In this method CO2 laser (6w, 100 palse/s) with fiber optic filaments is used. Contact mode is used in a cervical to apical direction. Care is taken not to harm tooth . Intervention 2: Gingival depigmentation using conventional method in the right half of maxillary anterior sextant. In this method epithelial layer in pigmented areas is removed using diamond bur on high-speed dental headpiece under copious irrigation with saline solution.</i_freetext>
      <results_actual_enrolment></results_actual_enrolment>
      <results_date_completed></results_date_completed>
      <results_url_link></results_url_link>
      <results_summary></results_summary>
      <results_date_posted></results_date_posted>
      <results_date_first_publication></results_date_first_publication>
      <results_baseline_char></results_baseline_char>
      <results_participant_flow></results_participant_flow>
      <results_adverse_events></results_adverse_events>
      <results_outcome_measures></results_outcome_measures>
      <results_url_protocol></results_url_protocol>
      <results_IPD_plan>Undecided - It is not yet known if there will be a plan to make this available</results_IPD_plan>
      <results_IPD_description></results_IPD_description>
    </main>
    <contacts>
      <contact>
        <type>public</type>
        <firstname>Maryam Nourelahi</firstname>
        <middlename></middlename>
        <lastname></lastname>
        <address>Dِepartment of Periodontology, Dental faculty,17-Shahrivar Blvd., Semnan University of Medical Sciences</address>
        <city>Semnan</city>
        <country1>Iran (Islamic Republic of)</country1>
        <zip>3519899951</zip>
        <telephone>+98 23 3334 1449</telephone>
        <email>m.noorelahi@gmail.com</email>
        <affiliation>Semnan University of Medical Sciences</affiliation>
      </contact>
      <contact>
        <type>scientific</type>
        <firstname>Maryam Nourelahi</firstname>
        <middlename></middlename>
        <lastname></lastname>
        <address>Department of Periodontology, Faculty of dentistry, 17-Shahrivar Blvd.</address>
        <city>Semnan</city>
        <country1>Iran (Islamic Republic of)</country1>
        <zip>3519899951</zip>
        <telephone>+98 23 3334 1449</telephone>
        <email>m.noorelahi@gmail.com</email>
        <affiliation>Semnan University of Medical Sciences</affiliation>
      </contact>
    </contacts>
    <countries>
      <country2>Iran (Islamic Republic of)</country2>
    </countries>
    <criteria>
      <inclusion_criteria>Physiologic entity of gingival pigmentation
Medium to severe hyperpigmentation based on Dimmitt-Gupta index (DOP)
Plaque index less than 20%</inclusion_criteria>
      <agemin>18 years</agemin>
      <agemax>40 years</agemax>
      <gender>Both</gender>
      <exclusion_criteria>Medical history which affects the process of tissue healing
Background or environmental factors as etiology of hyperpigmentation such as endocrine disorders or smoking
Pregnancy or breast feeding
Thin biotype of periodontium
Acute gingival or periodontal disease</exclusion_criteria>
    </criteria>
    <health_condition_code>
      <hc_code></hc_code>
    </health_condition_code>
    <health_condition_keyword>
      <hc_keyword></hc_keyword>
    </health_condition_keyword>
    <intervention_code>
      <i_code>Treatment - Surgery</i_code>
      <i_code>Treatment - Surgery</i_code>
    </intervention_code>
    <intervention_keyword>
      <i_keyword>Gingival depigmentation using CO2 laser in the left half of maxillary anterior sextant. In this method CO2 laser (6w, 100 palse/s) with fiber optic filaments is used. Contact mode is used in a cervical to apical direction. Care is taken not to harm tooth </i_keyword>
      <i_keyword>Gingival depigmentation using conventional method in the right half of maxillary anterior sextant. In this method epithelial layer in pigmented areas is removed using diamond bur on high-speed dental headpiece under copious irrigation with saline solution</i_keyword>
    </intervention_keyword>
    <primary_outcome>
      <prim_outcome>Area of pigmentation. Timepoint: Before the procedure, 1 and 6 months after the procedure. Method of measurement: Taking standard photographs and then quantifying area of pigmentation using Gridlines option in Microsoft Paint software.</prim_outcome>
    </primary_outcome>
    <secondary_outcome>
      <sec_outcome>Amount of gingival recession. Timepoint: Before the procedure, 1 and 6 months after the procedure. Method of measurement: Distance from gingival margin to Cemento Enamel Junction.</sec_outcome>
    </secondary_outcome>
    <secondary_sponsor>
      <sponsor_name></sponsor_name>
    </secondary_sponsor>
    <secondary_ids>
      <secondary_id>
        <sec_id></sec_id>
        <issuing_authority></issuing_authority>
      </secondary_id>
    </secondary_ids>
    <source_support>
      <source_name>Semnan University of Medical Sciences</source_name>
    </source_support>
    <ethics_reviews>
      <ethics_review>
        <status>Approved</status>
        <approval_date>2017-05-21</approval_date>
        <contact_name>Ethics committee of Semnan University of Medical Sciences</contact_name>
        <contact_address>Basij Blvd. Amirkabir bridge Semnan Semnan Iran (Islamic Republic of)</contact_address>
        <contact_phone></contact_phone>
        <contact_email></contact_email>
      </ethics_review>
    </ethics_reviews>
  </trial>
</trials>
