Q: Given a passage, construct a question on the basis of the information present in the passage. Construct the question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) it answer uses text phrases from the passage. Avoid creating questions that (i) can't be answered correctly without actually understanding the passage and (ii) uses the same words or phrases given in the passage.
A randomised, prospective clinical trial with parallel groups was carried out in a single centre.', 'The experimental (gel) group (n=41) applied a bioadhesive 0.2% chlorhexidine gel to the wound during the first postoperative week and a control (rinse) group (n=32) used a 0.12% (v/v) chlorhexidine mouthrinse during the first week following third molar extraction. Patients were evaluated on the third and seventh postoperative day.', "Alveolar osteitis was evaluated according to Blum's criteria..", 'A 70% decrease in postoperative alveolar osteitis in the gel group (P 0.04) was observed. The rinse group had 25% incidence of postoperative alveolar osteitis, whereas the gel group had 7.5%. T equates to a number needed to treat of six (95% confidence interval, 3-144).
A:
Does chlorhexidine gel reduce incidence of alveolar osteitis after extraction of the mandibular third molars?