Down's syndrome in children males – biochemical characterisations in different media using non-randomised trial and systematic study

Organizational Data

DRKS-ID:
DRKS00014074
Recruitment Status:
Recruiting complete, study complete
Date of registration in DRKS:
2018-04-10
Last update in DRKS:
2021-12-08
Registration type:
Retrospective

Acronym/abbreviation of the study

DSCM

URL of the study

No Entry

Brief summary in lay language

Sample collection started on 9 May 2016 and finished on 19 September 2016. However, the whole study (incl. analyses, Duraphat treatment, and both of the Results & Discussion writing) was terminated on 16 October 2017. Challenges of the subject: 1- 1- DS subjects represent a still unsolved biological/clinical paradox and are usually combined with nutritional diseases. 2- As soon as, nutritional status estimation, environmental effects and anthropometric parameters worth much concerns from scientists, so we came to study the essential dental indices, and major physical and biochemical properties in different body fluids of DS patients. 3- No paper has mentioned yet the possible elements that DS needs in food. 4- Most doctors do not really consider that trisomy 21 alters the overall metabolism and both the physical and biochemical properties of the biological fluids, enough to account for differences in DS pertaining food and the psychology of the patients. 5- Knowledge integration between saliva and oral pathology is far from being complete. Therefore, it is of critical importance to establish which salivation patterns and concentration ranges of each salivary component are to be considered as normal in order for the clinician to diagnose altered salivary phenotypes possibly linked to pathological systemic or oral conditions. 6- In an almost unlimited number of pathologic conditions, there is no study yet has studied the allowable minerals concentrations and the impact effects of heavy metals on the brain. For instance, we do not know yet, how these elements can affect the biochemical pathways? Or which can enhance the neurotransmitter system? We think heavy metals are triggered by environmental factors, pathological condition, or alterations in genotype. To date, environmental factors have not received the research attention that they warrant in medical treatment. 7- Recently, researchers had proposed the possibility of using saliva as an alternative to blood in diagnosing and monitoring of diseases. 8- It is currently essential to study whether the salivary indices, physical and biochemical characteristics would be altered in DS even little is known about dental issues and the periodontal diseases caused by poor oral hygiene in DS. 9- Reports on the chemical metabolism in disabilities are scarce. 10- No biomarkers have been established for minerals (as manganese) exposures. 11- No paper has linked before the health of disabilities to the nutrition and environment. The current study will provide highly influential impacts on Down's syndrome (DS) patient's life and biomedical science. For instance, it enhances our understanding of the salivary function in promoting healthy oral condition associated with DS patients. DS's anomalies (i.e. dental caries and cariogenesis) and their birth's distributions among single births and twins and their relations to mother's age were all defined. The registered participants (N) were 225, have been assessed for eligibility. The total exclusion states were 80, among them, 48 did not meet the inclusion criteria, 22 were declined to participate, and 10 were excluded for other reasons. 145 non-randomised states were assessed and then collaborated in this study. 74 healthy and non-diabetic young individuals and 71 DS children received allocated to intervention with no discounted interventions or any lost to follow-up criterion. Salivary buffering capacity of the controls (N =10× 5 repetitions) and Down's syndrome (N =10× 5 repetitions) were measured. Periodontal, biochemical saliva, and elemental analyses in other biological samples were 145×3, 145×5, and 145×5, respectively. Health-related quality of life (HRQoL) was registered in 71 DS parents. HRQoL in parents of DS children (6-15 years, 50×3) was assessed and tabulated. 71 DS patients prescribed different therapies for feeding difficulties and their Standard of Living was further assessed. Basic physiology and biochemistry were analysed in controls (23×3) and DS patients (23×3). However, due to a shrink available data related to the scope of this study, we compared only some data with previous studies and added proper justifications for new observations. In specific, launching from our observations, the oral prophylaxis, dental hygiene recommendations, and medical treatments were all described in more and sufficient details which can extremely avail both DS patients and doctors. Stakeholders: Clinical biochemists, biologists researching in the medical aspects of genetic disorders and birth defects, analytical chemists, biological chemists, oral biologists, developmental biologists, dieticians, global health organisations, nutritionists, ecologists, human and medical geneticists, paediatricians, pathologists, physiologists, neuroscientists, gynaecologists, psychologists, dentists, researchers and students in life sciences, researchers in biofluids, specialists in biochemical genetics and clinical genetics, anthropologists and researchers in hygiene and communicable diseases, and Down's syndrome' relatives and caregivers.

Brief summary in scientific language

Down's syndrome children between their nature and toxic attractions from the environment, oral conservative and prosthetic treatment with Duraphat as an alternative medicine to classic topical fluoride

Health condition or problem studied

Free text:
MedDRA - DOWN SYNDROME
Healthy volunteers:
No Entry

Interventions, Observational Groups

Arm 1:
71 DS (trisomy of chromosome 21 (21q22)) children received allocated to intervention with no discounted interventions or any lost to follow-up criterion. The procedure adopted in this work covered patients in 2016 and 2017 and was reported as consensus findings including further recommendations of the National Committee of Environmental Health Sciences (NCEHS) expert panel located in Damascus-Syria. The whole study (incl. Duraphat treatment and both of the Results & Discussion) was terminated on 16 October 2017. The salivary buffering capacity of the Down's syndrome (N =10× 5 repetitions) were measured. Periodontal, biochemical saliva, and elemental analyses in other biological samples were 145×3, 145×5, and 145×5, respectively. Health-related quality of life (HRQoL) was registered in 71 DS parents. HRQoL in both parents (father and mother) of DS children (6-15 years, 50×3) was assessed and tabulated. 71 DS patients prescribed different therapies for feeding difficulties and their Standard of Living was further assessed. Basic physiology and biochemistry were analysed in DS patients (23×3). However, due to a shrink available data related to the scope of this study, we compared only some data with previous studies and added proper justifications for new observations. In specific, launching from our observations, the oral prophylaxis, dental hygiene recommendations, and medical treatments were all described in more and sufficient details which can extremely avail both DS patients and doctors. Each individual gave at least 40 mL of saliva in consecution during 14-55 days. The volume of parotid saliva and whole saliva were collected in as few collecting sessions as compatible with the rate of salivary flow rate (SFR) and subject co-operation, 30 min was the maximum time allocated for any one meeting. Oral health assessment: The oral health assessment followed the protocol used in the National Oral Health Survey which was based on World Health Organization (WHO) guidelines. The assessment was divided into two parts: a behavioural self-administered questionnaire and an oral health assessment. The behavioural questionnaire was administered to the respondents with disability development (DD) by the research team and they were also asked about personal and demographic information, dental practices (incl. period since last dental visit, number of dental visits in the last 12 months, number of times teeth brushed in a day) and type of dental services used (private or public). For the subjects with more severe disabilities, information was provided by a caregiver. The oral health assessment was carried out by a single dental surgeon with experience in the dental examination of people with DD. The examination covered oral mucosal pathology, malocclusion, periodontal disease, dental caries and treatment needs. To determine oral health status, the oral region of each participant was first examined, and the DMFT index was calculated and recorded for each of them according to Klein et al. DMFT index measures the amount of permanent tooth decayed, missing, and filled in individual's mouth, ranging from 0 to 32. A panoramic X-ray study was made. Comparisons were made between the two groups for every calculated index. The clinical attachment loss (CAL) was used to assess the chronic periodontitis and has been evaluated through periodontal probing, appreciating the depth of the pockets and also the degree of recession, at the level of every test tooth in at least 6 sites (B, L, MB, ML, DL). The reference element for evaluating the attachment loss was amelocemental junction (AML) expressing the distance between the bottom of the sulcus/pocket in millimetres. The Rx exam, useful in appreciating the importance of attachment loss was performed on retro-dento-alveolar clichés in isometric and orthoradial incidence or through orthopantomography (OPT). The periodontal destructions are characterised by the formation of deep periodontal pockets, associated to the indicated quantities of bacterial plaque and intense gingival inflammation using Quigley-Hein index of bacterial plaque (QHI) value. Observations corresponding to each individual were recorded on the odontogram, with the determination of carried, absent and obturated teeth (CAO) index. Oral hygiene was rated based on: (i) clinical examination of the calculus index (CI), (ii) Sulcus bleeding index (SBI), (iii) O'Leary plaque index (PI) used to measure the amount of plaque, and (iv) the periodontal condition evaluated by gingival bleeding index (GBI). Bacterial plaque was dyed and sampled with a blunt-tipped dental probe, sliding the latter along the gingival sulcus at four points per tooth, and evaluating all surfaces. The presence or absence of plaque was estimated, regardless of its amount, the corresponding index (PI) was obtained as a percentage on summing the results then dividing by the total number of points explored. The simplified debris index (DI-S) was based on numerical determinations representing the amount of debris found on six preselected tooth surfaces: the buccal/labial surfaces of the maxillary right first molar (tooth 16), the maxillary right central incisor (tooth 11), the maxillary left first molar (tooth 26), the mandibular left central incisor (tooth 31), and the lingual surfaces of the mandibular left first molar (tooth 36) and the mandibular right first molar (tooth 46). Duraphat treatment was carried out during the following period: 26 September 2016-28 September 2017. 145 DS patients (age: 2-15 yrs, males) have been assessed for Duraphat treatment eligibility. The extra-oral assessment (the skin of the face and around the mouth for abnormalities (spots, inflammation, swelling, etc) and the lips for lesions/infections were checked out. The intra-oral assessment (inner cheeks and the insides of the lips, upper and lower surfaces of the tongue, signs of systemic illness (i.e. colds, flu) or any abnormality of the face, lips or soft tissues of the mouth were all excluded for the Duraphat application. In addition, teeth and gums were thoroughly checked in a systematic order for signs of decay and/or infection. We considered at an earlier stage, that the Duraphat application to exposed pulps was uncomfortable for DS patients. Thus, we secured that all the participants had not any hypersensitivity to colophony (natural resin), ulcerative gingivitis, stomatitis, and bronchial asthma. The total exclusion states were 60, among them, 53 did not meet the inclusion criteria and 7 were excluded for other reasons. Children were comfortable and were wearing glasses and bibs. Duraphat was prepared by 5% NaF in a natural colophonium base, stored below 25°C and used within 3 months. Duraphat has adhered to tooth surfaces even when wet with saliva. Chemically, Duraphat was dispensed in a concentration of 50 mg NaF per mL, yielding 22.6 mg F- per mL. This procedure was hardened to a yellow-brown coating. Clinically, Duraphat was applied as a spot application for at-risk tooth surfaces mostly susceptible to caries attack (no application was performed to the whole dentition in one session). Thereby, 0.4 mL of Duraphat varnish treatment was applied 3 times a week as a dosage for pre-school DS children (2-5 yrs). While 0.6 mL (3 times a week) with repeated applications at 6 monthly intervals was subjected to school children (6-15 yrs) (twice in the period of this study). During the mentioned period, the subject was received 9 fluoride varnish applications. The instruments and clothing which came into contact with Duraphat were cleaned with alcohol. The beanbag or chair was wiped with a detergent after each child visit and the application area was left clean and tidy at the end of a session. After Duraphat application, patients were advised: (1) not to remove the varnish film of Duraphat, (2) not to eat for 30 min after treatment, (3) not to brush their teeth or chew food for at least 4 hrs, (4) to eat just soft food after 4 hrs and for the rest of the day, (5) no fluoride supplements to take for 2-days, and (6) to continue tooth brushing with fluoride paste after the second day of Duraphat treatment and then they could continue direct.
Arm 2:
control group: (2-15 yrs, males, N = 74) healthy and non-diabetic children are received allocated to intervention with no discounted interventions or any lost to follow-up criterion. The salivary buffering capacity of the controls (N =10× 5 repetitions) were measured. Basic physiology and biochemistry were analysed in controls (23×3).

Endpoints

Primary outcome:
Primary outcome: Biochemical change in saliva (control and DS patients) Primary timepoint : 30 days post commencement of intervention and each individual gave at least 40 mL of saliva in consecution during 14-55 days. The volume of parotid saliva and whole saliva were collected in as few collecting sessions as compatible with the rate of salivary flow rate (SFR) and subject co-operation, 30 min was the maximum time allocated for any one meeting. Notably, parotid saliva was obtained from the subjects (DS and controls) using a modified Carlson-Crittenden device. In general, saliva was collected under petroleum ether (A.R.) (Sigma-Aldrich Chemie Gmbh, Munich, Germany) and these samples were collected in Salivette tubes (Sarstedt AG & Co., Nümbrecht, Oberbergischer Kreis, Germany) after overnight fasting. The chemical analyses were included the following: pH, electrical conductivity (EC), total dissolved solids (TDS), total suspended solids (TSS), salinity, turbidity, colour, saliva flow rate (SFR), the decay, missing, and filled tooth (DMFT) index, glucose, total protein, carbon dioxide (CO2), total phosphorus (TP), total nitrogen (TN), major alkaline and alkaline-earth ions, aluminium (Al), silicon (Si), and heavy metals.
Secondary outcome:
Secondary outcome: The oral health assessment (DS children) followed the protocol used in the National Oral Health Survey which was based on World Health Organization (WHO) guidelines Secondary timepoint : The behavioural self-administered questionnaire was carried out 7 days post commencement of intervention for each individual and an oral health assessment (examination covered oral mucosal pathology, malocclusion, periodontal disease, dental caries and treatment needs) was executed by a single dental surgeon with experience in the dental examination of people with disability development (DD) 18 days post commencement of intervention. Secondary outcome [1]: Dissolved CO2 in saliva using the micro-diffusion method of Conway. Secondary timepoint [1]: The first day of sample collection and during 17-55 days post commencement of intervention. Secondary outcome [2]: IgA determination in saliva using Stone method Secondary timepoint [2]: The first day of sample collection and during 17-55 days post commencement of intervention. Secondary outcome [3]: Total nitrogen of saliva determined by the micro-Kjeldahl method. Secondary timepoint [3]: The first day of sample collection and during 17-55 days post commencement of intervention. Secondary outcome [4]: The physical characterisation of saliva: Ash weight measured by ASTM E1755-01 method, Saliva flow rate (SFR) measured by graduated syringes method, Viscosity measured by Ostwald-type capillary viscometer, Surface tension measured by Micro capillary rise apparatus, Electrical conductivity measured by ASTM D1125 method using MP-4 Portable Meter, Salinity measured by MP-4 Portable Meter, Total dissolved solids (TDS) measured by MP-4 Portable Meter using ASTM D5, Total suspended solids measured by ASTM D5907 method using DR 1900, and Turbidity measured by ASTM D1889 using 2100Q IS Secondary timepoint [4]: The first day of sample collection and during 17-55 days post commencement of intervention. Secondary outcome [5]: Total protein in saliva was measured at 546 nm by the colorimetric method using acid violet pigment (AV17) Secondary timepoint [5]: 3 days post commencement of intervention. Secondary outcome [6]: Health-related quality of life (HRQoL) in both parents of children Secondary timepoint [6]: 3 days post commencement of intervention. Secondary outcome [7]: Maladaptive behaviour profile (aggression, anxiety, attention, depression, hyperactivity, somatisation, and withdrawal) Secondary timepoint [7]: 7 days post commencement of intervention Secondary outcome [8]: Challenging behaviours analysis as argumentativeness, disobedience, stubbornness, depression and conduct problems (i.e. neurophysiologic, feeding difficulties and food pocketing or packing). Secondary timepoint [8]: 7 days post commencement of intervention Secondary outcome [9]: Therapies employed for feeding difficulties have involved the following procedures: Feeding therapy use, Speech-language pathologist, Reflux medication use, Liquid or solid chaser use when eating, Past use of modified utensils when eating, Occupational therapist, Surgeries for eating and swallowing, Current use of modified utensils when eating, Therapy to reduce saliva, Have to remove food from cheeks when eating, and Psychologist. The count and the percent of collaboration for each procedure were registered. Secondary timepoint [9]: 65 days post commencement of intervention. Secondary outcome [10]: Physiological study: Descriptive variables: Age, IQ, Height (cm), Stature (cm), Weight (kg), BMI (kg m-2), BMD of the lumbar Vertebrae (g cm-2) Body composition: TBF (%) and WC (cm) Energy balance: TEI (kcal), TEE (kcal), and TEB (kcal) Body mass index (BMI), Bone mineral density (BMD), White blood cells or leukocytes (WBCs), Haemoglobin (Hb or Hgb), Haematocrit (Ht or HCT), Milli-international units (mIU), Creatinine (CR), Procollagen type 1 N propeptide (P1NP), C-terminal telopeptide (CTx), High-density lipoprotein cholesterol (HDL-C), Low-density lipoprotein cholesterol (LDL-C), Triglyceride (TG), Blood glucose (BG), C-reactive protein (CRP), Homocysteine (HCY), Systolic blood pressure (SBP), Diastolic blood pressure (DBP), Triiodothyronine Free serum (Free T3), Thyroxin Free serum (Free T4), Total body fat (TBF), Waist circumference (WC), Total energy intake (TEI), Total energy expenditure (TEE), Total energy balance (TEB) Cholesterol profiles, triglycerides, and glucose levels were determined by colorimetric reflectance spectrophotometry. CRP was analysed with an ultrasensitive assay using rate nephelometry. Insulin was determined by chemiluminescent immunoassay. Homocysteine was determined through a fluorescence polarisation immunoassay. Seated auscultatory blood pressure was measured with a mercury sphygmomanometer according to the guidelines established by the Joint National Committee on Prevention, Detection, Evaluation, and Treatment of High Blood Pressure. With participants dressed in lightweight clothing, weight was measured to the nearest 0.5 kg. Height was measured to the nearest 0.5 cm. BMI was calculated by dividing the weight in kilograms by the height squared in meters squared. Total body fat was assessed by dual-energy x-ray absorptiometry (Prodigy, software version 6.7; GE Medical Systems, Madison, Wisconsin). Waist circumference was measured to the nearest 0.1 cm with a cloth measuring tape. BMD of the lumbar vertebrae was measured in posteroanterior (PA) projection. Note our patients have not taken Na-drugs as sodium zirconium cyclosilicate (ZS-9: (2Na•H2O•3H4SiO4•H4ZrO6)n) and no cardiorenal diseases (incl. kidney) observed and no agents taken to control plasma of K+ Secondary timepoint [10]: The first day of sample collection and during 10-100 days post commencement of intervention. Secondary outcome [11]: Cyanide (CN-) measured in saliva, blood, urine, and hair by ASTM D2036-09(2015) method using DR 1900 (Hach, Colorado, USA) Secondary timepoint [11]: 30 days post commencement of intervention. Secondary outcome [12]: Thiocyanate (SCN-) measured in saliva, blood, urine, and hair by ASTM D4193-08(2013)e1 method using DR 1900 (Hach, Colorado, USA) Secondary timepoint [12]: 30 days post commencement of intervention. Secondary outcome [13]: Total nitrogen (TN) measured in saliva by ASTM D8083 – 16 method using Micro Kjeldahl Apparatus (Labconco, Kansas, MO, USA) Secondary timepoint [13]: 30 days post commencement of intervention. Secondary outcome [14]: Sodium (Na) and potassium (K) analyses in saliva, blood, urine, and hair measured by ASTM D1428 using Jenway PFP7 flame photometer (Jenway Gransmore Green Felsted, Essex, UK). Secondary timepoint [14]: 33 days post commencement of intervention. Secondary outcome [15]: Calcium (Ca) and magnesium (Mg) measured in saliva, blood, urine, and hair using Microlyte 6 analyser (Thermo Fisher Scientific Oy, Vantaa, Finland) and the method developed by our team (Aljerf and Maslah, 2017). Secondary timepoint [15]: 35 days post commencement of intervention. Secondary outcome [16]: Strontium (Sr) and barium (Ba) measured in saliva, blood, urine, and hair, using ICP-MS, Thermo Elemental, (Thermo Fisher Scientific, Waltham, MA, USA) Secondary timepoint [16]: 38 days post commencement of intervention. Secondary outcome [17]: Aluminium (Al) measured in saliva, blood, urine, and hair by ASTM D857 method using Acid extractable by the preliminary treatment and GTA-novAA 400 P (Analytik Jena AG , Jena, Germany) Secondary timepoint [17]: 40 days post commencement of intervention. Secondary outcome [18]: Silicon (Si) measured in saliva, blood, urine, and hair by ASTM D857 using Acid extractable by the preliminary treatment and GTA-novAA 400 P (Analytik Jena AG , Jena, Germany) Secondary timepoint [18]: 42 days post commencement of intervention. Secondary outcome [19]: Molybdenum (Mo), copper (Cu), iron (Fe), manganese (Mn), zinc (Zn), chromium (Cr), and titanium (Ti) measured in saliva, blood, urine, and hair by ASTM D3919 method using GTA-novAA 400 P (Analytik Jena AG , Jena, Germany) Secondary timepoint [19]: 44 days post commencement of intervention. Secondary outcome [20]: Total phosphorous (TP) measured in saliva by ASTM D515 using Spectron CA72TP (Endress+Hauser AG, Reinach BL, Switzerland) Secondary timepoint [20]: 50 days post commencement of intervention. Secondary outcome [21]: The standard of living was assessed as poor, average, and wealthy. In addition, the social capital (SC), sense of coherence (SOC), general health questionnaire (GHQ), perceived positive change (PPC) had been estimated. Secondary timepoint [21]: 65 days post commencement of intervention. Klein H, Palmer CE, Knutson JW. Studies on dental caries: I. Dental status and dental needs of elementary school children. Public Health Rep 1938;53:751-65. doi: 10.2307/4582532. Aljerf L, Maslah A. Characterization and validation of candidate reference methods for the determination of calcium and magnesium in biological fluids. Microchem J 2017;132:411-21. doi: 10.1016/j.micro.2017.03.001.

Study Design

Purpose:
Prevention
Allocation:
Non-randomized controlled study
Control:
  • Other
Phase:
N/A
Study type:
Interventional
Mechanism of allocation concealment:
No Entry
Blinding:
No
Assignment:
Parallel
Sequence generation:
No Entry
Who is blinded:
No Entry

Recruitment

Recruitment Status:
Recruiting complete, study complete
Reason if recruiting stopped or withdrawn:
No Entry

Recruitment Locations

Recruitment countries:
  • Syria
Number of study centers:
Monocenter study
Recruitment location(s):
  • University medical center Department of Basic Sciences, Faculty of Dental Medicine, Damascus University, Main Highway, AlMazaa, Damascus, Syria Damascus

Recruitment period and number of participants

Planned study start date:
2016-05-08
Actual study start date:
2016-05-08
Planned study completion date:
No Entry
Actual Study Completion Date:
2017-09-28
Target Sample Size:
225
Final Sample Size:
145

Inclusion Criteria

Sex:
Male
Minimum Age:
2 Years
Maximum Age:
15 Years
Additional Inclusion Criteria:
Males, children, Permanent residences in Damascus, Living far from plaster dust sources of any possible adjacent construction sites and far from the industrial zone (incl. concrete plants), Non-smokers (all kinds of tobacco), Non-smoker families, Unstimulated saliva samples, Controls were healthy and non-diabetic young individuals, Controls had no systemic diseases or any local infection before 3 months and did not also take any medication for at least 3 months before sample collection, DS children patients were trisomy 21 diagnosed by karyotype test and assessed by clinical examination. Patients were euthyroid at the time of study as their thyroid-stimulating hormone (TSH) and free thyroxine hormone (FT4) were within the normal range.

Exclusion Criteria

Females, Male smokers, Smoker families, Systemic diseases, Participant takes medication for at least 3 months, Children with congenital oligodontia and delayed eruption (more than 1yr), Individuals with the history of antibiotics, anticholinergic, antihistaminic and antipsychotic therapy two weeks prior to sample collection, intervened medications that could get in the way with ions metabolisms such as taking vitamin D, aspirin, or herbal medicine which can easily interfere for instance with Fe metabolism. In addition, candidates with concentrations of thiocyanate higher than 80 mg SCN-/L (1 mg SCN-/L =17.2 µM SCN-/L) saliva or 3.00 mg SCN-/L serum were excluded from the study.

Addresses

Primary Sponsor

Address:
Department of Basic Sciences, Faculty of Dental Medicine, Damascus University, Main Highway, AlMazaa, Damascus, Syria
AlMazaa, Damascus, Syria
00963 Damascus
Syria
Telephone:
No Entry
Fax:
No Entry
Contact per E-Mail:
Contact per E-Mail
URL:
No Entry
Investigator Sponsored/Initiated Trial (IST/IIT):
Yes

Contact for Scientific Queries

Address:
Department of Basic Sciences, Faculty of Dental Medicine, Damascus University, Main Highway, AlMazaa, Damascus, Syria
Prof Loai Aljerf
00963 Damascus
Syria
Telephone:
+963944482203
Fax:
+963944482203
Contact per E-Mail:
Contact per E-Mail
URL:
No Entry

Contact for Public Queries

Address:
CosmeSurge Clinics, Bawsher State, Muscat, Sultanate of Oman, P.O. Box 1822, P.C. 130
Dr Mazen Aljurf
Mascat
Oman
Telephone:
+96824124900
Fax:
No Entry
Contact per E-Mail:
Contact per E-Mail
URL:
No Entry

Principal Investigator

Address:
Department of Basic Sciences, Faculty of Dental Medicine, Damascus University, Main Highway, AlMazaa, Damascus, Syria
Prof Loai Aljerf
00963 Damascus
Syria
Telephone:
+963944482203
Fax:
+963944482203
Contact per E-Mail:
Contact per E-Mail
URL:
No Entry

Sources of Monetary or Material Support

Institutional budget, no external funding (budget of sponsor/PI)

Address:
Department of Basic Sciences, Faculty of Dental Medicine, Damascus University, Main Highway, AlMazaa, Damascus, Syria
5735 Damascus
Syria
Telephone:
+9631133923500
Fax:
+963112129807
Contact per E-Mail:
Contact per E-Mail
URL:
http://damascusuniversity.edu.sy/faculties/dent/en/index.php

Ethics Committee

Address Ethics Committee

Address:
Institutional Ethics Committee (IEC-FD-DU)-Faculty of Dental Medicine-Damascus University [Institutional Ethics Committee (IEC-FD-DU)-Faculty of Dental Medicine-Damascus University, P.O. 7535, Damascus, Syria]
P.O. 7535
Damascus
Syria
Telephone:
No Entry
Fax:
No Entry
Contact per E-Mail:
Contact per E-Mail
URL:
No Entry

Vote of leading Ethics Committee

Vote of leading Ethics Committee
Date of ethics committee application:
2015-09-14
Ethics committee number:
EC/FD/1538
Vote of the Ethics Committee:
Approved
Date of the vote:
2015-10-28

Further identification numbers

Other primary registry ID:
No Entry
EudraCT Number:
No Entry
UTN (Universal Trial Number):
U1111-1210-5037
EUDAMED Number:
No Entry

IPD - Individual Participant Data

Do you plan to make participant-related data (IPD) available to other researchers in an anonymized form?:
No
IPD Sharing Plan:
No Entry

Study protocol and other study documents

Study protocols:
No Entry
Study abstract:
No Entry
Other study documents:
No Entry
Background literature:
No Entry
Related DRKS studies:
No Entry

Publication of study results

Planned publication:
No Entry
Publikationen/Studienergebnisse:
https://doi.org/10.21203/rs.3.rs-30313/v1
Date of first publication of study results:
No Entry
DRKS entry published for the first time with results:
No Entry

Basic reporting

Basic Reporting / Results tables:
No Entry
Brief summary of results:
No Entry