the aim of the study is to evaluate the efficacy of guided biofilm therapy (GBT) for treatment of deep periodontal pockets. the objectives are 1- To compare the change in the clinical periodontal parameters and microbiological parameters by using real time PCR for P. gingivalis, Aggregatibacter actinomycetemcomitans and Filifactor alocis among sites treated by GBT and conventional hand instrumentation after a period of 3 months and to assess the level of the selected periodontal pathogens in deep periodontal pockets and to estimate and compare deep periodontal pockets which need surgery after 3 months of non-surgical treatment by GBT and conventional hand instrumentation. the hypothesis is whether there are no differences in in the clinical and microbiological parameters among sites treated by GBT and conventional hand instrumentation after a period of 3 months or there are differences in in the clinical and microbiological parameters among sites treated by GBT and conventional hand instrumentation after a period of 3 months. The participants will be selected on a consecutive basis from patients referred to the Department of Periodontics, College of Dentistry, University of Baghdad. For each patient, each site will be randomly assigned to either treatment protocol: 1. Sites treated with GBT. 2. Sites treated with conventional manual instrumentation only.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
25
Removing plaque and calculus by initially detecting it with a disclosing agent followed by the use of air abrasive powder for the removal of supra and subgingival plaque.
Removing plaque and calculus by conventional root surface debridement
Periodontal pocket depth (PPD)
PPD will be measured from the gingival margin to the base of the pocket by using the University of North Carolina 15 probe (UNC15) probe to measure the reduction of the pocket depth in millimeters.
Time frame: 3 months
Plaque index
Biofilm will be determined using a dichotomous scoring system as present (1) or absent (0) after using a disclosing agent to assess the agreement on the scoring of the biofilm.
Time frame: 3 months
Bleeding on probing
Bleeding on probing will be recorded as present (1) or absent (0) after probing all the sites by using UNC15 probe.
Time frame: 3 months
Relative attachment level
Relative attachment level will be recorded by making a customized acrylic stent and then measuring the relative attachment level from a fixed point on the stent to the base of the pocket by using UNC15 probe in millimeters.
Time frame: 3 months
Changes in the bacterial load
Real time polymerase chain reaction (qPCR) will be used to assess the detection and the quantity of these periodontal pathogens (P.gingivalis, Aggregatibacter actinomycetemcomitans and filifacter alocis) in the subgingival biofilm sample according to the manufacturer's instructions. identification of target bacteria through PCR will be executed using species specific primers.
Time frame: 3 months
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