Static Guidance Improved Access to Calcified Canals, Mostly in Lab Studies, Review Finds

Edited by Dentaltown staff

CBCT-based static guidance for endodontic access in calcified canals was associated with fewer canal-access failures and perforations, shorter procedure times, and less loss of tooth structure, according to a systematic review and meta-analysis published Oct. 15 in BMC Oral Health. Most of the evidence behind those findings came from nonclinical studies.

The authors searched four databases through Aug. 15, 2026. They included 79 reports: 32 independent analytical studies and 47 contextual clinical or safety reports. Twenty-five of the 32 analytical studies were nonclinical. Static, dynamic, and robotic or haptic guidance were analyzed as separate intervention classes, and all of the primary meta-analyses concerned static guidance.

Canal-access failure was less frequent with static guidance (odds ratio 0.082; 95% CI, 0.031–0.216), with similar relative estimates in laboratory and clinical subgroups. No perforations occurred in 157 static-guided preparations, compared with 18 of 162 conventional preparations.

Static guidance was also associated with a mean 35.29 mm³ less tooth-structure loss and access or procedure times a mean 13.72 minutes shorter. Heterogeneity for the tooth-structure estimate was high (I² = 98.2%), and the time estimate had an I² of 59.4%.

Angular deviation showed no consistent advantage, and a favorable estimate for apical deviation remained heterogeneous. Evidence for dynamic navigation and robotic or haptic systems was substantially more limited.

The review was conducted by Mina Sadat Mirkhani, Amirali Zahedinejad, and colleagues at institutions including Shahed University, Baqiyatallah University of Medical Sciences, and Tabriz University of Medical Sciences in Iran. The authors reported no funding and no competing interests.

The authors concluded that static guidance shows technical advantages under predominantly experimental conditions. They said current evidence does not establish the size of any patient-level clinical benefit or reduction in complications, and comparative clinical evidence remains limited.

Sources:
BMC Oral Health, “CBCT-guided endodontics for calcified canals: accuracy, efficiency, safety, and tooth preservation: a systematic review and meta-analysis,” published online Oct. 15, 2026: link.springer.com/10.1186/s12903-026-10167-y