Table 1.

DPBRN studies field tested as of March 2011

Study Number	Study Title	Study Design	Number of Practitioners or Practices	Number of Patients, Procedures, or Other Entities
1	Dental tobacco control randomized clinical trial	Randomized clinical trial	190	11,898 patients
2	Practice-based root canal treatment effectiveness	Retrospective cohort study	13	84 patients; 174 treated teeth
3	Assessment of caries diagnosis and caries treatment	Paper questionnaire to dentists	565	n/a
4	Reasons for placing the first restoration on permanent tooth surfaces	Cross-sectional; consecutive patients	227	5,810 patients; 9,902 restorations
5	Reasons for replacement or repair of dental restorations	Cross-sectional; consecutive patients	197	7,463 patients; 9,828 restorations
6	CONDOR case-control study of osteonecrosis of the jaws	Case-control study	81	764 patients
7	Retrospective cohort study of osteonecrosis of the jaws	Retrospective cohort study	n/a	572,606 patients
8	Longitudinal study of dental restorations placed on previously unrestored surfaces	Prospective cohort study	227	5,810 patients; 9,902 restorations
9	Longitudinal study of repaired or replaced dental restorations	Prospective cohort study	197	7,463 patients; 9,828 restorations
10	Development of a patient-based provider intervention for early caries management	Cross-sectional; consecutive patients, clinical data collection, interviews, and questionnaires with dentists and patients	10	336 patients
11	Patient satisfaction with dental restorations	Cross-sectional; consecutive patients	196	7,384 patients
12	Prevalence of questionable occlusal caries lesions	Cross-sectional; consecutive patients	82	7,677 patients; 2,301 caries lesions
13	Longitudinal study of questionable occlusal caries lesions	Prospective cohort study	82	7,677 patients; 2,301 caries lesions
14	Hygienists’ Internet tobacco cessation randomized clinical trial	Randomized clinical trial	100	1,865 patients so far [study in progress]
15	Blood glucose testing in dental practice	Cross-sectional; consecutive patients	28	498 patients
16	Assessing the impact of participation in practice-based research on clinical practice and patient care	Cross-sectional paper questionnaire with dentists and dental hygienists	687	n/a
17	Perioperative pain and root canal therapy	Short-term prospective cohort study	63	759 patients
18	Persistent pain and root canal therapy	Prospective cohort study with 6-month follow-up	63	759 patients
19	Primary care management of temporomandibular joint disorders	Electronic questionnaire with dentists	503	n/a
20	Infrastructure update survey	Electronic questionnaire with practitioners who had completed one or more studies to that point	685 so far [study in progress]	n/a
21	Diagnoses for persistent dentoalveolar pain following root canal therapy	Nested case-control study	[study in progress]	[study in progress]

n/a: not applicable