Micro‐CT evaluation of ‘danger zone’ and microcrack formation in mesial root canals of primary teeth with single‐file rotary and reciprocating systems

Abstract

Root canal treatment is frequently needed in primary teeth as mostly irreversible pulpal injuries occur as a result of deep dentin caries. Many functional and aesthetic problems can be avoided by keeping the primary teeth in the mouth as a natural space maintainer until the eruption time of the permanent successors. 1 The goals of endodontic treatments are the same as in the permanent teeth. There is the possibility of similar complications such as stripping, perforations, or microcracks during or after endodontic procedures. 1 Studies have reported that the root canals of primary teeth are variable in terms of internal and external anatomy compared with permanent teeth. [2][3][4] In particular, the thickness of the root dentin in the furcation area in the mandibular primary molars is considerably reduced in the distal wall of the mesial

Update in the Diagnosis and Treatment of Root Canal Therapy in Temporary Dentition through Different Rotatory Systems: A Systematic Review

“…A year earlier, Jeevanandan G [ 28 ] observed that by using Kedo SG files, the clinical time was significantly reduced due to the decrease in the number of files during preparation. Likewise, and coinciding with the work of Yüksel B [ 10 ] in 2022, as shorter files were used (17 mm), a simpler and faster insertion into the canals was achieved, which facilitated their preparation.…”

“…Regarding the sample included in the studies obtained ( Table 1 and Table 2 ), most of them analyzed an average of 30 teeth [ 10 , 11 ]. Highlighting Mohammadi, D [ 12 ], with a maximum of 80, and Moraes [ 13 ] with a minimum of 1.…”

“…Lastly, regarding the irrigant used, sodium hypochlorite is the most used at different concentrations: 2.5% [ 10 ], 5.25% [ 11 ] or 1% [ 11 ], although other authors also use saline solution to eliminate bacteria [ 13 , 18 ].…”

“…For Yüksel B [ 10 ], the rotary system that resulted in the highest rate of reduction in root dentin thickness was WaveOne Gold, followed by XP-endo Shaper and one shape. Regardless of the material used to seal the root canals, the quality of the filling will also depend on the type of instrumentation.…”

Shaping Properties and Outcomes of Nickel-Titanium Reciprocation Systems in Primary Teeth: A Systematic Review and Meta-Analysis of In Vitro Studies

“…The characteristics of the 12 included studies [7,[25][26][27][28][29][30][31][32][33][34][35] are described in Table 2. The sample size for each group in the reported studies varied from 15 to 30 root canals per group with an average curvature ranging between 5° and 40°.…”