A clinical trial to assess the effect of a Zinc-L-Carnosine-based mouth rinse on periodontal tissues and pain after scaling and root planing
A randomized, double blind, 3 group parallel study with random allocation of 75 patients to any of three groups; Zinc-L-Carnosine-based mouth rinse, Chlorhexidine mouth rinse and placebo (water) control. Three days after professional oral hygiene, which aimed at the normalization of the periodontal index, the primary (HI, VAS) and secondary (mSBI; FMPS; VMI; SI) outcomes of the study are measured to obtain baseline information, and then scaling and root planing are carried out. The participants will be advised to follow their regular oral hygiene procedures (tooth brushing) in addition to the allocated mouth rinse. They will be examined again for primary and secondary outcomes at 7 and 21 days. Clinical evaluation: Clinical examination of each participant will be done by a single examiner using the previously described VAS scale and a UNC periodontal probe (No. 5 explorer Hu-Friedy, Chicago, Ill). In addition to these indices, each subject will be asked to report any adverse events they have encountered during the experiment.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
75
Undiluted 10 ml of Zinc L-Carnosine mouth rinse, retain for 3 minutes, 3 times daily
Undiluted 10 ml of Chlorhexidine mouth rinse, retain for 3 minutes, 3 times daily
Rinse mouth with 10 ml of water, retain for 3 minutes, 3 times daily
UOC Maxillofacial Surgery and Odontology, University of Milan
Milan, Lombardy, Italy
Change in Healing Index (H.I.)
The Laundry-Turnbull and Howley index will be used to evaluate healing, considering the changes made by Pippi et al. In 2015. In particular, seven parameters will be assessed, to each of which a value of 1 or 0 will be assigned. The sum of the values will indicate the degree of healing to be compared between the different groups. These seven parameters are: redness of mucosa, granulation tissue, suppuration, swelling, re-epithelialization, bleeding, pain on palpation. Higher score means worse outcome.
Time frame: 0, 7, 21 days
Change in the Visual Analogue Scale (VAS) of pain
Participants will be asked to mark the perceived degree of pain on a scale of 100 dashes, with the lowest score being "no pain" and the highest "the worst pain". Higher score means worse outcome.
Time frame: 0, 7, 21 days
Change in Modified Sulcus Bleeding index (Mombelli) (mSBI)
The clinical examination of each participant will be carried out by a single examiner using the UNC periodontal probe and the explorer n. 5 (Hu-Friedy, Chicago, III) to assess sulcus bleeding and assign a score: 0 absence of bleeding; 1. presence of bleeding on probing without redness and edema; 2. presence of bleeding on probing with redness and edema; 3. spontaneous bleeding. 6 sites (3 buccal + 3 lingual / palatal) are considered for each tooth. Higher score means worse outcome.
Time frame: 0, 7, 21 days
Change in Full Mouth Plaque Score (O'Leary) (FMPS)
Quantitative plaque index, indicates presence of plaque on teeth. Six sites (3 buccal + 3 lingual / palatal) are considered for each tooth, to which a score is given: 0: absence of plaque 1. one third (1/3) of the surface shows plaque 2. two thirds (2/3) of the surface show plaque 3. more than 2/3 of the surface shows plaque Higher score means worse outcome.
Time frame: 0, 7, 21 days
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Change in Calculus index (Volpe-Manhold index) (VMI)
Assessment of tartar on lingual surface of lower anterior teeth, expressed in millimeters. Three measurements are taken for each tooth; mesio-lingual, central lingual and disto-lingual. Total score is the sum of all measurements of all six lower anterior teeth. Higher score means worse outcome.
Time frame: 0, 7, 21 days
Change in Stain index (Macpherson stain index) (S.I.)
Assessment of tooth staining. Expressed via score and plus signs: 0-1 mild stains + 1.1 - 2 moderate stains ++ 2.1 - 3 heavy stains +++ Average stain value = sum of stain scores / total number of teeth Higher score means worse outcome.
Time frame: 0, 7, 21 days