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The effect of the thread depth on the mechanical properties of the dental implant.

Lee SY, Kim SJ, An HW, Kim HS, Ha DG, Ryo KH, Park KB - J Adv Prosthodont (2015)

Bottom Line: The insertion torque value was evaluated with a surgical engine.Groups A and group B had similar maximum static compressive strengths, as did groups C and D (P>.05).The deep threads had a mechanical stability.

View Article: PubMed Central - PubMed

Affiliation: Institute of Science & Technology, Megagen Implant, Gyeongsan, Republic of Korea.

ABSTRACT

Purpose: This study aimed to evaluate the effect of implant thread depth on primary stability in low density bone.

Materials and methods: The insertion torque was measured by inserting Ti implants with different thread depths into solid rigid polyurethane blocks (Sawbones) with three different bone densities (0.16 g/cm(3), 0.24 g/cm(3), and 0.32 g/cm(3)). The insertion torque value was evaluated with a surgical engine. The static compressive strength was measured with a universal testing machine (UTM) and the Ti implants were aligned at 30° against the loading direction of the UTM. After the static compressive strength test, the Ti implants were analyzed with a Measurescope.

Results: The Ti implants with deeper thread depth showed statistically higher mean insertion torque values (P<.001). Groups A and group B had similar maximum static compressive strengths, as did groups C and D (P>.05). After the static compressive strength, the thread shape of the Ti implants with deeper thread depth did not show any breakage but did show deformation of the implant body and abutment.

Conclusion: The implants with deeper thread depth had higher mean insertion torque values but not lower compressive strength. The deep threads had a mechanical stability. Implants with deeper thread depth may increase the primary stability in areas of poor quality bone without decreasing mechanical strength.

No MeSH data available.


Related in: MedlinePlus

(a) The failure mode of group A (A), group B (B), group C (C), and group D (D) after the static compressive strength tests. The deformation was observed in the implant body and the abutment but not the threads. (b) The thread morphology of group C (A) and group D (B) after the static compressive strength tests. Breakage was not observed in the threads in the Ti implants with deeper threads.
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Figure 4: (a) The failure mode of group A (A), group B (B), group C (C), and group D (D) after the static compressive strength tests. The deformation was observed in the implant body and the abutment but not the threads. (b) The thread morphology of group C (A) and group D (B) after the static compressive strength tests. Breakage was not observed in the threads in the Ti implants with deeper threads.

Mentions: After the static compressive strength tests, the Ti implants were examined macroscopically. The failure mode was observed to be deformation in the abutment and being torn horizontally at the upper side of the Ti implant (Fig. 4A). The threads in the Ti implants with deeper threads did not show breakage (Fig. 4B).


The effect of the thread depth on the mechanical properties of the dental implant.

Lee SY, Kim SJ, An HW, Kim HS, Ha DG, Ryo KH, Park KB - J Adv Prosthodont (2015)

(a) The failure mode of group A (A), group B (B), group C (C), and group D (D) after the static compressive strength tests. The deformation was observed in the implant body and the abutment but not the threads. (b) The thread morphology of group C (A) and group D (B) after the static compressive strength tests. Breakage was not observed in the threads in the Ti implants with deeper threads.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4414941&req=5

Figure 4: (a) The failure mode of group A (A), group B (B), group C (C), and group D (D) after the static compressive strength tests. The deformation was observed in the implant body and the abutment but not the threads. (b) The thread morphology of group C (A) and group D (B) after the static compressive strength tests. Breakage was not observed in the threads in the Ti implants with deeper threads.
Mentions: After the static compressive strength tests, the Ti implants were examined macroscopically. The failure mode was observed to be deformation in the abutment and being torn horizontally at the upper side of the Ti implant (Fig. 4A). The threads in the Ti implants with deeper threads did not show breakage (Fig. 4B).

Bottom Line: The insertion torque value was evaluated with a surgical engine.Groups A and group B had similar maximum static compressive strengths, as did groups C and D (P>.05).The deep threads had a mechanical stability.

View Article: PubMed Central - PubMed

Affiliation: Institute of Science & Technology, Megagen Implant, Gyeongsan, Republic of Korea.

ABSTRACT

Purpose: This study aimed to evaluate the effect of implant thread depth on primary stability in low density bone.

Materials and methods: The insertion torque was measured by inserting Ti implants with different thread depths into solid rigid polyurethane blocks (Sawbones) with three different bone densities (0.16 g/cm(3), 0.24 g/cm(3), and 0.32 g/cm(3)). The insertion torque value was evaluated with a surgical engine. The static compressive strength was measured with a universal testing machine (UTM) and the Ti implants were aligned at 30° against the loading direction of the UTM. After the static compressive strength test, the Ti implants were analyzed with a Measurescope.

Results: The Ti implants with deeper thread depth showed statistically higher mean insertion torque values (P<.001). Groups A and group B had similar maximum static compressive strengths, as did groups C and D (P>.05). After the static compressive strength, the thread shape of the Ti implants with deeper thread depth did not show any breakage but did show deformation of the implant body and abutment.

Conclusion: The implants with deeper thread depth had higher mean insertion torque values but not lower compressive strength. The deep threads had a mechanical stability. Implants with deeper thread depth may increase the primary stability in areas of poor quality bone without decreasing mechanical strength.

No MeSH data available.


Related in: MedlinePlus