The reliability of furcation measurements

Area of Science:

• Periodontology
• Dental diagnostics
• Clinical measurement

Background:

• Periodontitis commonly affects molars, leading to furcation involvement.
• Accurate assessment of furcation involvement is crucial for treatment planning.
• Horizontal probing attachment level (PAL-H) is a key metric for evaluating furcation defects.

Purpose of the Study:

• To investigate the measurement error of horizontal probing attachment level (PAL-H) in molar furcations.
• To compare presurgical and intrasurgical assessments of furcation degrees.
• To identify factors influencing the accuracy of PAL-H measurements.

Main Methods:

• 100 molars from 25 periodontitis patients were assessed for furcation involvement.
• Horizontal probing attachment level (PAL-H) was measured twice presurgically within 14 days.
• Measurements were repeated intrasurgically and compared with presurgical findings.
• Standard deviation of single measurements and weighted kappa coefficients were calculated.

Main Results:

• Overall standard deviation for PAL-H measurements was 0.739 mm.
• Measurement error was significantly lower for buccal (0.602 mm) and lingual (0.559 mm) furcations compared to distolingual (1.099 mm).
• Agreement of replicate measurements was excellent for buccal, lingual, and mesiolingual furcations, but only moderate for distolingual.
• Furcation depth, width, and location significantly influenced PAL-H differences (p < 0.05).
• No significant difference was found between presurgical and intrasurgical furcation degree assessments.

Conclusions:

• Measurement error in PAL-H assessment varies by furcation location, with distolingual sites being less precise.
• Presurgical and intrasurgical assessments of furcation degrees demonstrate good reliability.
• Furcation characteristics like depth, width, and location are critical factors affecting measurement accuracy.