Molecular methodology to assess the impact of cancer chemotherapy on the oral bacterial flora: a pilot study.

OBJECTIVE: This pilot study determined the profile of the oral bacterial flora in an outpatient cancer population before and after chemotherapy using molecular techniques. STUDY DESIGN: We recruited 9 newly diagnosed breast cancer patients scheduled for induction chemotherapy. All were seen immediately before chemotherapy, and 7 to 14 days later. At both visits, we performed oral evaluations and obtained mucositis grading (with the World Health Organization [WHO] scale), absolute neutrophil counts (ANC), and bacterial samples from the buccal mucosa. Bacterial DNA was isolated, and 16S ribosomal RNA gene clonal libraries were constructed. Sequences of genes in the library were used to determine species identity by comparison to known sequences. RESULTS: After chemotherapy, WHO scores of 0 and 1 were in 3 and 6 patients, respectively, and mean ANC (+/-SD) dropped from 3326 +/- 463 to 1091 +/- 1082 cells/mm(3). From pre- and post-chemotherapy samples, 41 species were detected, with a predominance of Gemella haemolysans and Streptococcus mitis. More than 85% of species have not been previously identified in chemotherapy patients. Seven species appeared exclusively before chemotherapy and 25 after chemotherapy. After chemotherapy, the number of species per patient increased by a mean of 2.6 (SD = 4.7, P = .052). CONCLUSION: We identified species not previously identified in chemotherapy patients. Our results suggest a shift to a more complex oral bacterial profile in patients undergoing cancer chemotherapy.

Oral health needs and barriers to dental care in hospitalized children.

The goal of this study was to examine the oral health status and utilization of dental care reported by hospitalized children. A bedside oral examination was performed on hospitalized children. Past dental treatment and current oral health needs were assessed. The mean age (+/- SD) of 120 enrolled patients was 6.7 (+/- 2.9) years (range 3 to 12); 60% were males. The age of the patients' first dental office visit was 3.5 +/- 1.8 years, with 28% having never seen a dentist. Unmet oral health needs (e.g., untreated dental caries) were noted in 42% of children, and soft tissue (mucosal) abnormalities in 59% of children. Children with chronic medical conditions reported barriers to receiving dental care more often (24%) than children with acute medical conditions (3.5%) (p=0.04). A high prevalance of unmet oral health needs and soft tissue abnormalities was identified in a hospitalized pediatric population. Children with chronic medical conditions were more likely to experience barriers to obtaining dental care.

The impact of oral disease and nonsurgical treatment on bacteremia in children.

BACKGROUND: The authors examine the role of dental disease and nonsurgical dental procedures in the incidence and duration of bacteremia in children. METHODS: The authors randomized a group of children to receive amoxicillin or a placebo before dental rehabilitation in an operating room setting. They collected eight blood draws at the following times: two minutes after intubation (draw 1); after dental restorations, pulp therapy and cleaning (draw 2); 10 minutes later (draw 3); and five draws during and after dental extractions (draws 4-8). The authors compared dental disease parameters and the type of dental procedures performed with the incidence and duration of bacteremia. RESULTS: The authors enrolled 100 children (aged 1-8 years) in the study. The incidence of bacteremia from draw 2 was 20 percent in the placebo group and 6 percent in the amoxicillin group (P = .07), and the incidence from draw 3 was 16 percent in the placebo group and zero percent in the amoxicillin group (P = .03). Subjects with higher gingival scores were more likely to have a bacteremia for draw 2 (P = .01). The authors found that subjects in the group with bacteremia for draw 3 had undergone more pulpotomies than did subjects in the group without bacteremia for draw 3 (3 +/- 2.5 standard deviation [SD] versus 1.5 +/- 1.6 SD, P = .04), while they found almost no differences for draw 2. CONCLUSIONS: This study suggests that gingival disease has an impact on bacteremia after dental restorations and prophylaxis. Although antibiotics have an impact, they do not eliminate bacteremia altogether.

Odontogenic signs and symptoms as predictors of odontogenic infection: a clinical trial.

BACKGROUND: The authors conducted a study to determine if odontogenic signs and symptoms in the emergency department predicted the development of overt odontogenic infection at a follow-up dental visit. METHODS: One hundred ninety-five patients with odontalgia, but without overt signs of infection, were enrolled in a prospective, double-blind, randomized clinical trial. Data included dental diagnosis, pain characteristics, presence of caries and restorations, presence and size of periapical radiolucencies and other diagnostic test results. RESULTS: Thirteen of 134 subjects for whom data were available had signs of infection at the follow-up visit. Subjects in the follow-up infected (FU-I) group had larger baseline radiolucencies than did subjects in the follow-up noninfected (FU-NI) group, and restorations were more prevalent for involved teeth in the FU-I group than in the FU-NI group. CONCLUSIONS: A relationship exists between radiolucency size and the presence of amalgam restorations in patients who develop clinical signs of infection. Penicillin did not appear to influence this progression. CLINICAL IMPLICATIONS: Antibiotics are not effective in preventing the development of odontogenic infection when definitive dental therapy cannot be provided for acute pain in the absence of clinical signs of infection. Although the overall risk of developing infection is low, early treatment is indicated for teeth with larger periapical radiolucencies, amalgam restorations or both.

Efficacy of penicillin for dental pain without overt infection.

OBJECTIVES: Dental pain is a common presenting symptom in the acute care setting. Even in the absence of overt infection, many physicians routinely prescribe antibiotics such as penicillin. The authors sought to test the hypothesis that penicillin is not necessary or beneficial in the treatment of undifferentiated dental pain without overt infection. METHODS: This prospective, randomized, double-blind, placebo-controlled trial was conducted at an urban teaching hospital with approximately 105,000 emergency department visits per year. A convenience sample of adult emergency department patients presenting with dental pain and no clinically overt infection was randomized to receive penicillin or placebo. A structured evaluation was performed at enrollment and again at a 5- to 7-day follow-up visit. The main outcome measure was evidence of overt dental infection at the 5- to 7-day follow-up visit. RESULTS: A total of 195 patients were enrolled. Ninety-eight (50%) were randomized to treatment with penicillin. A total of 125 patients (64%) were followed up. Outcome data were identified for nine additional study patients, who returned to the dental clinic or emergency department outside of the scheduled follow-up period and were included in the final analysis. Overall, 13 of 134 patients (9%) developed signs of infection: six of 64 (9%) from the penicillin group and seven of 70 (10%) from the placebo group (p = 0.90). There was no significant difference between the penicillin and placebo groups in baseline characteristics, medication compliance, or visual analog scale pain scores at enrollment. CONCLUSIONS: These data support the hypothesis that penicillin is neither necessary nor beneficial in the treatment of undifferentiated dental pain in the absence of overt infection.

Impact of amoxicillin prophylaxis on the incidence, nature, and duration of bacteremia in children after intubation and dental procedures.

BACKGROUND: Controversy exists about the impact of prophylactic antibiotics on bacteremia after invasive dental procedures. The purpose of this double-blind, randomized, placebo-controlled study was to determine the impact of amoxicillin prophylaxis on the incidence, nature, and duration of bacteremia from nasotracheal intubation and dental procedures in children. METHODS AND RESULTS: Children were randomly assigned before surgery to the American Heart Association (AHA)-recommended dose of amoxicillin or to a placebo. Aerobic and anaerobic blood cultures were drawn at 8 specific time points after intubation, dental restorative and cleaning procedures, and before, during, and after dental extraction(s), to include blood drawings up to 45 minutes after the last extraction. Aerobic and anaerobic blood culture results were used to determine the incidence, nature, and duration of bacteremia from these procedures. For the 100 children enrolled (mean age, 3.5 years), the overall incidence of positive blood cultures, defined as at least 1 positive culture of the 8, was significantly higher in the placebo (84%) than the amoxicillin group (33%) (P<0.0001). Bacteremia occurrence rates after intubation and after dental restorations and cleaning were 18% and 20% in the placebo group and 4% and 6% in the amoxicillin group (P=0.05 and P=0.07, respectively). At 1.5 minutes after the initiation of dental extractions, bacteremia occurred in 76% of the placebo group versus 15% of the amoxicillin group (P<0.001). The majority of the 152 positive cultures and of the 29 different bacteria identified were Gram-positive cocci. Bacteremia persisted longer in the placebo group. CONCLUSIONS: Bacteremia from these procedures occurs more often, from a wider variety of bacterial species, and for a longer duration after dental extractions than previously reported in any age group. Amoxicillin has a significant impact on the incidence, nature, and duration of bacteremia after nasal intubation, dental restorative and cleaning procedures, and dental extractions.

Relationship between bleeding time test and postextraction bleeding in a healthy control population.

OBJECTIVE: We sought to determine whether cutaneous bleeding time (BT) is related to bleeding outcome measures after a single tooth extraction. STUDY DESIGN: This was a prospective clinical pilot study of 30 subjects. Cutaneous BT was evaluated before a single tooth extraction. After extraction, an oral BT was determined. Subjects were contacted 3 to 7 hours and 2 days after extraction to assess further postoperative bleeding. RESULTS: The mean cutaneous BT was 5.9 minutes (range 1.5-10.0 minutes). The mean oral BT was 7.5 minutes (range 0-20 minutes). Cutaneous BT did not correlate with oral BT or any of our measures of postoperative bleeding. However, the oral BT correlated with the number of hours of bleeding after surgery (R(s) = 0.54, P =.03). The time necessary to perform the extraction correlated with the extraction site bleeding 3 to 7 hours after surgery (R(s) = 0.67, P =.0006). CONCLUSION: Cutaneous BT did not correlate with measures of postoperative bleeding in the present study, but oral BT immediately after extraction correlated with the duration of subsequent postoperative bleeding.