Ti-6Al-4V 합금 미니 임플란트에 마찰고정한 경사 지대주의 피로특성 (Fatigue Characteristics of Ti-6Al-4V Alloy Mini-Implant with Friction Locked Abutment)

서지정보

· 발행기관 : 대한치과재료학회
· 수록지 정보 : 대한치과재료학회지 / 35권 / 4호 / 359 ~ 368페이지
· 저자명 : 황갑운, 이만형, 송경우, 이민호, 배태성

초록

Titanium miniscrew implant systems are being used as a temporary implant system, because
they are easy to place and to remove. The use of titanium miniscrew implant systems as a semi-permanent implant has not been reported in clinical case reports. To our knowledge, there
are no published reports evaluating the stability of mini implant systems. Information about the
shape of mini implants used in relation to the stability vary depending on bone quality.
This study was carried to find out the possibility of semi-permanent use of the 15°-angled
abutment friction-locked on Ti-6Al-4V alloy implant fixtures with diameter of 2.5, 3.0 and 3.5
mm. At first, we measured the pull-out strengths of the abutment friction-locked by 4 strokes of
mallet with the weight of 130 g. Secondly, we measured pull-out strengths of the abutment after
the cyclic compression loading of the amplitude range of 2 to 100 N during 1×106 cycles. Cyclic
loading was performed based on ISO/FDIS 14801:2003(E). Test specimen was clamped to be 10
degree with the loading axis of the testing machine. The cyclic loading was applied at load cycles of 10 Hz using dynamic fatigue testing machine. Fatigue test was set the amplitude range to be within 2 % to 80 % of the static strength. Fatigue limit that guarantee a life of 5×106 cycles.
The results obtained were summarized as follows;
1. The retention force was increased by friction locking between implant fixture and abutment
during the cyclic loading with compression and bending.
2. Fatigue limits measured in this study were 261.6 N, 303.1 N, and 552.2 N for 2.5 ㎜, 3.0 ㎜,
and 3.5 ㎜ in diameter of implant, respectively. It means that the fatigue limits tend to increase with the cross sectioned area of implant.
3. Failures of implants were not observed at the connected area between implant fixture and
abutment. However, bending and/or fracture was happened at the screw area of implant
fixture. Judging from the above results, it will be good stability for clinical application, when the
15°-angled abutment friction-locked on mini implant fixture of diameter of 2.5 ㎜ are properly used for anterior prosthetic restoration.

영어초록

Titanium miniscrew implant systems are being used as a temporary implant system, because
they are easy to place and to remove. The use of titanium miniscrew implant systems as a semi-permanent implant has not been reported in clinical case reports. To our knowledge, there
are no published reports evaluating the stability of mini implant systems. Information about the
shape of mini implants used in relation to the stability vary depending on bone quality.
This study was carried to find out the possibility of semi-permanent use of the 15°-angled
abutment friction-locked on Ti-6Al-4V alloy implant fixtures with diameter of 2.5, 3.0 and 3.5
mm. At first, we measured the pull-out strengths of the abutment friction-locked by 4 strokes of
mallet with the weight of 130 g. Secondly, we measured pull-out strengths of the abutment after
the cyclic compression loading of the amplitude range of 2 to 100 N during 1×106 cycles. Cyclic
loading was performed based on ISO/FDIS 14801:2003(E). Test specimen was clamped to be 10
degree with the loading axis of the testing machine. The cyclic loading was applied at load cycles of 10 Hz using dynamic fatigue testing machine. Fatigue test was set the amplitude range to be within 2 % to 80 % of the static strength. Fatigue limit that guarantee a life of 5×106 cycles.
The results obtained were summarized as follows;
1. The retention force was increased by friction locking between implant fixture and abutment
during the cyclic loading with compression and bending.
2. Fatigue limits measured in this study were 261.6 N, 303.1 N, and 552.2 N for 2.5 ㎜, 3.0 ㎜,
and 3.5 ㎜ in diameter of implant, respectively. It means that the fatigue limits tend to increase with the cross sectioned area of implant.
3. Failures of implants were not observed at the connected area between implant fixture and
abutment. However, bending and/or fracture was happened at the screw area of implant
fixture. Judging from the above results, it will be good stability for clinical application, when the
15°-angled abutment friction-locked on mini implant fixture of diameter of 2.5 ㎜ are properly used for anterior prosthetic restoration.

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