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ePaper created 2017-03-17, 11:08:54 | version 1.38.0
E v a l u a t i o n o f s u r g i c a l d i f f i c u l t y o f e x t r a c t i o n Variable Inclination of third molar Inclination of second molar Pericoronal radiolucency Root radiolucency Root shape Group Vertical (1) Mesial (2) Distal or horizontal (3) Mesial (1) Vertical (2) Distal (3) Large (1) Small (2) Not visible (3) Large (1) Small (2) Not visible (3) Single or fused (1) Separate (2) Dysmorphic or anomalous (3) Mean ostectomy time by Mean total surgical time group (seconds) (minutes) Table 1 47.7 51.1 63.3 54.1 54.5 53.5 48.1 58.0 51.7 52.9 54.4 56.0 39.4 47.9 67.6 p = 0.141 p = 0.996 p = 0.295 p = 0.939 p = 0.001* 8.7 10.2 12.9 10.9 10.7 9.0 10.6 10.7 10.9 10.1 11.0 10.9 8.1 9.5 13.1 p = 0.043* p = 0.886 p = 0.993 p = 0.732 p = 0.001* *p < 0,05; **p < 0,01 Table 2 Ostectomy time Tooth sectioning time Total surgical time p-value (r) p-value (r) p-value (r) Winter’s distance 0.025* (r = 0.232) 0.928 (r = -0.011) 0.406 (r = 0.087) Coronal width 0.687 (r = -0.042) 0.006** (r = 0.317) 0.007** (r = 0.276) Distance from mandibular ramus to distal surface of second molar Coronal area 0.009* (r = -0.270) 0.144 (r = -0.172) 0.027* (r = -0.230) 0.143 (r = -0.154) 0.358 (r = 0.109) 0.838 (r = -0.022) Root length 0.470 (r = -0.077) 0.324 (r = 0.118) 0.157 (r = 0.150) *p < 0,05; **p < 0,01 Table 1 Study parameters with the greatest influence upon surgical dificulty. Table 2 Correlation of the quantitative parameters to the variable time according to the general linear multiple regression model. between the ascending mandibular ramus and the distal surface of the second molar (Class 3) shorten the surgical time. Conclusion In summary, an analysis of the surgical difi culty of impacted mandibular third molar extraction is essential for treatment planning and helps assess professional surgical skill, reduces compli cations, optimizes patient preparation, and minimizes postoperative pain and inflammation. Our scale is efective, since the mandibular third molars with the highest scores were signi- ficantly correlated to longer ostectomy time and total surgical time. The strongest predictors of ostectomy time were Winter’s distance, the dis- tance from the mandibular ramus to the second molar, and root shape, while the strongest pre- dictor of tooth sectioning time was coronal width. The parameters that influenced total surgical time the most were coronal width, mesial and distal or horizontal inclination of the third molar, separate and dysmorphic or anom- alous roots, and the distance between the man- dibular ramus and the second molar. Competing interests The authors declare that they have no compet- ing interests. 58 Volume 3 | Issue 1/2017 Journal of Oral Science & Rehabilitation