Primary implant stability in a bone model simulating clinical situations for the posterior maxilla: an in vitro study
Han Ho-Chyul, 임현창, 홍지연, 안수진, 한지영, 신승일, 정종혁, 허익, 신승윤,
소속 상세정보
( Han Ho-Chyul ) - Kyung Hee University School of Dentistry Department of Periodontology
임현창 ( Lim Hyun-Chang ) - Kyung Hee University School of Dentistry Department of Periodontology
홍지연 ( Hong Ji-Youn ) - Kyung Hee University School of Dentistry Department of Periodontology
안수진 ( Ahn Su-Jin ) - Kyung Hee University School of Dentistry Department of Biomaterials & Prosthodontics
한지영 ( Han Ji-Young ) - Hanyang University School of Medicine Department of Dentistry/Periodontology
신승일 ( Shin Seung-Il ) - Kyung Hee University School of Dentistry Department of Periodontology
정종혁 ( Chung Jong-Hyuk ) - Kyung Hee University School of Dentistry Department of Periodontology
허익 ( Herr Yeek ) - Kyung Hee University School of Dentistry Department of Periodontology
신승윤 ( Shin Seung-Yun ) - Kyung Hee University School of Dentistry Department of Periodontology
KMID : 0363020160460040254
Abstract
Purpose: The aim of this study was to determine the influence of anatomical conditions on primary stability in the models simulating posterior maxilla.
Methods: Polyurethane blocks were designed to simulate monocortical (M) and bicortical (B) conditions. Each condition had four subgroups measuring 3 mm (M3, B3), 5 mm (M5, B5), 8 mm (M8, B8), and 12 mm (M12, B12) in residual bone height (RBH). After implant placement, the implant stability quotient (ISQ), Periotest value (PTV), insertion torque (IT), and reverse torque (RT) were measured. Two-factor ANOVA (two cortical conditions×four RBHs) and additional analyses for simple main effects were performed.
Results: A significant interaction between cortical condition and RBH was demonstrated for all methods measuring stability with two-factor ANOVA. In the analyses for simple main effects, ISQ and PTV were statistically higher in the bicortical groups than the corresponding monocortical groups, respectively. In the monocortical group, ISQ and PTV showed a statistically significant rise with increasing RBH. Measurements of IT and RT showed a similar tendency, measuring highest in the M3 group, followed by the M8, the M5, and the M12 groups. In the bicortical group, all variables showed a similar tendency, with different degrees of rise and decline. The B8 group showed the highest values, followed by the B12, the B5, and the B3 groups. The highest coefficient was demonstrated between ISQ and PTV.
Conclusions: Primary stability was enhanced by the presence of bicortex and increased RBH, which may be better demonstrated by ISQ and PTV than by IT and RT.
키워드
Anatomic models; Dental implants; Maxilla; Maxillary sinus
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