Kocaeli Med J. 2023; 12(2): 288-297 | DOI: 10.5505/ktd.2023.25902

Comparative Evaluation of the Stability of Self-Tapping and Self-Drilling Orthodontic Micro Implants During Orthodontic Treatment

Sina YILDIRIM¹, Mehmet Birol Özel^2
1Private Practice, Ýstanbul
²Department of Orthodontics, Kocaeli University, Faculty of Dentistry,

INTRODUCTION: The purpose of this study was to compare the stability of self-tapping and self drilling orthodontic micro implants throughout canine distalisation in permanent first premolar extraction cases.
METHODS: 34 patients (19 girls, 15 boys) with mean age 16.47±2.3 years who were to be treated with extraction of permanent first premolars in the maxilla, mandible or both were recruited. 1.5×8 mm micro implants were placed between the roots of the second premolar and the first molar teeth within a split-mouth approach. 43 self-tapping and 43 self-drilling micro implants with a total of 86 micro implants (BioMaterials Korea Inc.) were inserted and 72 micro implants were included in the study owing to the the failure of 14 implants. The stability measurements of the micro implants were made at the 0th,1st,2nd,3rd and 4th months. Mean periotest values were compared by independent samples t-test. Comparisons among monthly measurements were made by repeated measurements of ANOVA.
RESULTS: The mean mesial and occlusal periotest values of self-tapping micro implants were 1.36±2.39/2.19±1.54, 11.94±8.62/11.06±7.84, 14.50±7.17/12.93±6.04, 15.43±6.07/13.83±5.51, 16.07±5.81/13.41±5.61 respectively and the mean mesial and occlusal periotest values of self-drilling micro implants were -0.11±2.55/-0.22±2.97, 14.81±7.94/12.71±8.15, 15.00±6.23/12.77±6.51, 13.37±5.32/11.27±5.62, 12.41±5.07/10.33±4.85 respectively. Statistically significant difference was found between the stability of self-tapping and self-drilling micro implants at the initial and 4th month measurements.
DISCUSSION AND CONCLUSION: The stability of both ST and SD micro implants were higher at the 0th month. Self-drilling micro implants exhibited higher primary stability than self-tapping micro implants but both of them failed to retain their primary stability values in the consequent months.

Keywords: micro implant, self-tapping, self-drilling, stability.

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Self-Tapping ve Self-Drilling Ortodontik Mikro Ýmplantlarýn Ortodontik Tedavi Sürecinde Stabilitelerinin Karþýlaþtýrmalý Deðerlendirilmesi

Sina YILDIRIM¹, Mehmet Birol Özel^2
1Özel Muayenehane; Ýstanbul
²Kocaeli Üniversitesi Diþ Hekimliði Fakültesi Ortodonti Anabilim Dalý

GÝRÝÞ ve AMAÇ: Bu çalýþmanýn amacý, birinci premolar diþ çekimli vakalarda kanin diþlerin distalizasyonu sürecinde, ankraj amaçlý yerleþtirilen self-tapping (ST) ve self-drilling (SD) ortodontik mikro implantlarýn tedavi boyunca stabilitelerini Periotest cihazý (Medizintechnik Gulden, Modautal, Almanya) ile deðerlendirmektir.
YÖNTEM ve GEREÇLER: Araþtýrma grubumuz, tedavileri alt veya üst çenede veya her iki çenede de daimi birinci premolar diþ çekimli olarak yürütülmüþ ortalama yaþlarý 16.47±2.3 yýl (kýzlarda 16.72±2.34 yýl, erkeklerde 16.12±2.29 yýl) olan toplam 34 hastadan oluþmuþtur. 1.5×8 mm mikro implantlar birinci molar ve ikinci premolar diþ kökleri arasýna split mouth tasarýmýna uygun olarak yerleþtirilmiþtir. 43’ü ST, 43’ü SD olmak üzere toplam 86 adet mikro implant (BioMaterials Korea Inc) yerleþtirilmiþ, 14 adet mikro implant ise baþarýsýz kabul edilerek çalýþma dýþý býrakýlmýþtýr. Stabilite ölçümleri 0.,1., 2., 3. ve 4. aylarda Periotest Classic ile yapýlmýþtýr. ST ve SD mikro implantlarýn tüm aylarda birbirleriyle karþýlaþtýrýlmalarý baðýmsýz t-testleriyle ve aylýk takip ölçümlerinin birbirleriyle karþýlaþtýrýlmasý tekrarlanan ölçümler için tek yönlü ANOVA testleriyle karþýlaþtýrýlmýþtýr.
BULGULAR: ST mikro implantlarýn mesial ve oklüzal periotest ortalama deðerleri aylara göre sýrasýyla 1.36±2.39/2.19±1.54, 11.94±8.62/11.06±7.84, 14.50±7.17/12.93±6.04, 15.43±6.07/13.83±5.51, 16.07±5.81/13.41±5.61 olarak bulunmuþ iken, SD mikro implantlarýn mesial ve oklüzal periotest ortalama deðerleri aylara göre sýrasýyla -0.11±2.55/-0.22±2.97, 14.81±7.94/12.71±8.15, 15.00±6.23/12.77±6.51, 13.37±5.32/11.27±5.62, 12.41±5.07/10.33±4.85 þeklindedir. ST ve SD mikro implant stabilite ölçümleri birbirlerinden 0. ve 4. aylarda istatistiksel olarak önemli fark göstermiþtir. Hem ST hem de SD mikro implant 0. ay stabiliteleri 1., 2., 3. ve 4. aylardan istatistiksel olarak daha yüksek bulunmuþtur.
TARTIÞMA ve SONUÇ: SD mikro implantlar ST mikro implantlardan daha yüksek primer stabilite göstermekte ve hem ST hem de SD mikro implantlar primer stabilitelerini, takip eden aylarda koruyamamaktadýrlar.

Anahtar Kelimeler: mikro implant, self-tapping, self-drilling, stabilite

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