282) Water flow rates (24 mL vs 40 mL) and time interval had no statistically significant effect on the implant's temperature change during the abutment preparation stage (P = .431 and P = .064, respectively). |
PMID:23713452 DOI:10.1563/AAID-JOI-D-13-00056 |
2015 The Journal of oral implantology |
* Implant Fixture Heat Transfer During Abutment Preparation. |
- The purpose of the study was to evaluate the effect of water flow rate on the heat transmission in implants during abutment preparation using a diamond bur in a high-speed dental turbine. Titanium-alloy abutments (n = 32) were connected to a titanium-alloy implant embedded in an acrylic resin within a water bath at a controlled temperature of 37°C. The specimens were equally distributed into 2 groups (16 each) according to the water flow rate used during the preparation phase. Group 1 had a water flow rate of 24 mL/min, and group 2 had a water flow rate of 40 mL/min. Each abutment was prepared in the axial plane for 1 minute and in the occlusal plane for 1 minute with a coarse tapered diamond bur using a high-speed dental handpiece. Thermocouples embedded at the cervix of the implant surface were used to record the temperature of heat transmission from the abutment preparation. Heat generation was measured at 3 distinct times (immediately and 30 seconds and 60 seconds after the end of preparation). Statistical analyses were carried out using 2-way analysis of variance and the Student t test. Water flow rates (24 mL vs 40 mL) and time interval had no statistically significant effect on the implant's temperature change during the abutment preparation stage (P = .431 and P = .064, respectively). Increasing the water flow rate from 24 to 40 mL/min had no influence on the temperature of the implant fixture recorded during preparation of the abutment. |
(1)67 differences | (15)5 correlations | (29)3 influence | (44)2 dose-dependent |
(2)40 increase | (16)5 effects | (30)3 negative | (45)2 elevation |
(3)36 difference | (17)5 for | (31)3 number | (46)2 evidence |
(4)28 decrease | (18)5 increases | (32)3 roles | (47)2 factors |
(5)12 reduction | (19)5 risk | (33)2 (P | (48)2 group |
(6)11 predictors | (20)4 effect | (35)2 alterations | (49)2 inhibition |
(7)10 association | (21)4 in | (36)2 and | (50)2 interaction |
(8)9 improvement | (22)4 reductions | (37)2 at | (51)2 morbidity |
(9)8 *null* | (23)4 relationship | (38)2 between-group | (52)2 positive |
(10)7 changes | (24)3 (p | (39)2 blood | (53)2 prediction |
(11)7 predictor | (25)3 alteration | (40)2 challenge | (54)2 proportion |
(12)7 role | (26)3 as | (41)2 contribution | (55)2 source |
(13)6 correlation | (27)3 higher | (42)2 cytotoxic | (56)2 time |
(14)5 associations | (28)3 improvements | (43)2 decreases |
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