FARKLI UZUNLUKTAKİ SİLİNDİRİK İMPLANTLARDA OLUŞAN STRES MİKTARININ SONLU ELEMANLAR ANALİZİ İLE İNCELENMESİ
Bu çalışmanın amacı, eşit yükler altında farklı uzunluktaki silindirik implantlarda oluşan stres dağılımının sonlu elemanlar stres analizi ile değerlendirilmesidir. Çalışmamızda 3,2 mm çapında 8 mm ve 10 mm uzunluğunda silindirik implantlar karşılaştırılmıştır. Çalışmamızda sonlu elemanlar stres analizi ile 150 N oblik yük altında implantlarda ve kemikte oluşan stres- gerinim miktarları incelenmiştir. Sonlu elemanlar analizi sonuçlarına bakıldığında; implantlar üzerinde oluşan Von Mises stresin istenilen aralıkta olduğu ve 4. sertlik titanyumun dayanım sınırları içerinde yer aldığı fakat kemikte oluşan asal gerinim miktarının ise Frost’un “Mekanostat” teorisinde belirtilen sınırlardan yüksek olduğu gözlenmiştir. Sonuç olarak 8 ve 10 mm uzunluğa sahip silindirik implantlarda, aradaki uzunluk farkının ne implantlarda ne de kemikte oluşan stres miktarını önemli ölçüde etkilemediği görülmüştür.
Evalution of Stress Amounts on Different Length Cylindric Implants via Finite Element Analysis
The aim of this study was to investigate stress amounts on different length cylindric implants with finite element analysis. In our study 3,2 mm diameter 8 mm and 10 mm length cylindric implants were compared. We analyzed stress-strain amounts of implants and bone, under 150 N oblique loads with finite element analysis. According to finite element analysis results, Von Mises stres on implants were within durability limits of grade 4 titanium. However, strain amounts on bone were out of range according to the Frost’s “Mekanostat” theory . In conclusion, the length is not a main factor to determine the stress levels on the implants and bone in 8 and 10 mm length cylindric implants.
___
- Testori T, Weinstein R, Wallace S. Maxillary sinus
surgery and alternatives in treatment,
Quintessence Publishing Co, London, 2009.
- Renouard F, Nisand D. Impact of implant length
and diameter on survival rates. Clin Oral Implants
Res 2006; 17(S2): 35-51.
- Chen ST, Buser D. Clinical and esthetic outcomes
of implants placed in postextraction sites. Int J
Oral Maxillofac Implants 2009;24: 13-18.
- Block MS, Kent JN. Sinus augmentation for dental
implants: The use of autogenous bone. J Oral
Maxillofac Surg 1997; 55(11): 1281-1286.
- Stevens P, Fredrickson E, Gres M. Implant
prosthodontics: Clinical and laboratory
procedures, Mosby, St Louis, 1994: 35.
- Friberg B, Ekestubbe A, Sennerby L. Clinical
Outcome of Brånemark System Implants of
Various Diameters: A Retrospective Study. Int J
Oral Maxillofac 2002; 17(5): 32-38.
- Gotfredsen K, Karlsson U. A prospective 5‐year
study of fixed partial prostheses supported by
implants with machined and TiO2‐blasted surface.
J Prosthodont 2001; 10(1): 2-7.
- Baggi L, Cappelloni I, Di Girolamo M, Maceri F,
Vairo G. The influence of implant diameter and
length on stress distribution of osseointegrated implants related to crestal bone geometry: A three
-dimensional finite element analysis. J Prosthet
Dent 2008; 100(6): 422-431.
- Chun HJ, Cheong SY, Han JH, et al. Evaluation of
design parameters of osseointegrated dental
implants using finite element analysis. J Oral
Rehabil 2002; 29(6): 565-574.
- Hansson S, Werke M. The implant thread as a
retention element in cortical bone: The effect of
thread size and thread profile: A finite element
study. J Biomech 2003; 36(9): 1247-1258.
- Frost HM. A 2003 update of bone physiology and
Wolff's Law for clinicians. Angle Orthod 2004; 74
(1): 3-15.
- Frost HM. Bone “mass” and the “mechanostat”: A
proposal. Anatomic Rec 1987; 219(1): 1-9.
- Frost HM. The laws of bone structure, CC Thomas,
Springfield, 1964.
- Romeo E, Lops D, Amorfini L, Chiapasco M,
Ghisolfi M, Vogel G. Clinical and radiographic
evaluation of small‐diameter (3.3‐mm) implants
followed for 1–7 years: A longitudinal study. Clin
Oral Implants Res 2006; 17(2): 139-148.
- Weinberg LA. The biomechanics of force
distribution in implant-supported prostheses. Int J
Oral Maxillofac Implants 1993; 8(1): 33-58.
- Kirsch A. The IMZ endosseous two phase implant
system: a complete oral rehabilitation treatment
concept. J Oral Implantol 1986; 12: 576-589.
- Lavelle CL. Biomechanical considerations of
prosthodontic therapy: The urgency of research
into alveolar bone responses. Int J Oral Maxillofac
Implants 1993; 8(2): 179-185.
- Rangert B, Krogh PH, Langer B, Van Roekel N.
Bending overload and implant fracture: A
retrospective clinical analysis. Int J Oral Maxillofac
Implants 1995; 10(3): 326-334.
- Richter EJ. In vivo vertical forces on implants. Int J
Oral Maxillofac Implants 1995; 10(1): 99-108.
- Skalak R. Biomechanical considerations in
osseointegrated prostheses. J Prosthet Dent 1983;
49(6): 843-848.
- Craig, RG., Kamal A, Floyd AP. Restorative Dental
Materials, C.V. Mosby Co, Saint Louis, 1975: 78-96.
- Clelland NL, Lee JK, Bimbenet OC, Brantley WA. A
three‐dimensional finite element stress analysis of
angled abutments for an implant placed in the
anterior maxilla. J Prosthodont 1995; 4(2): 95- 100.
- Cochran DL. The scientific basis for and clinical
experiences with Straumann implants including
the ITI® Dental Implant System: A consensus
report. Clin Oral Implants Res 2000; 11(s1): 33- 58.
- Meyer U, Vollmer D, Runte C, Bourauel C, Joos U.
Bone loading pattern around implants in average
and atrophic edentulous maxillae: A finite-element
analysis. J Craniomaxillofac Surg 2001; 29(2): 100
-105.
- Bidez MW, Misch CE, Misch C. Clinical
biomechanics in implant dentistry. Dent Implant
Prosthet 2005; 18(3): 338-339.
- Holmes DC, Loftus JT. Influence of bone quality on
stress distribution for endosseous implants. J Oral
Implantol 1996; 23(3): 104-111.
- Sato Y, Wadamoto M, Tsuga K, Teixeira E. The
effectiveness of element downsizing on a three‐ dimensional finite element model of bone
trabeculae in implant biomechanics. J Oral Rehabil
1999; 26(4): 288-291.
- Eser A, Akca K, Eckert S, Cehreli MC. Nonlinear
finite element analysis versus ex vivo strain gauge
measurements on immediately loaded implants.
Int J Oral Maxillofac Implants 2009; 24(3): 439- 446.
- Keyak J, Fourkas M, Meagher J, Skinner H.
Validation of an automated method of three- dimensional finite element modelling of bone. J
Biomed Eng 1993; 15(6): 505-509.
- Keyak J, Fourkas M, Meagher J, Skinner H.
Validation of an automated method of three- dimensional inite element modelling of bone. J
Biomed Eng 1993; 15(6): 505-509.
- Iplikçioğlu H, Akça K. Comparative evaluation of
the effect of diameter, length and number of
implants supporting three-unit fixed partial
prostheses on stress distribution in the bone. J
Dent 2002; 30(1): 41-46.
- Huang HL, Huang JS, Ko CC, et al. Effects of
splinted prosthesis supported a wide implant or
two implants: A three‐dimensional finite element
analysis. Clin Oral Implants Res 2005; 16(4): 466- 472.
- Chang S-H, Lin C-L, Hsue S-S, Lin Y-S, Huang S-R.
Biomechanical analysis of the effects of implant
diameter and bone quality in short implants
placed in the atrophic posterior maxilla. Med Eng
Phys 2012; 34(2): 153-160.
- Morneburg TR, Pröschel PA. Measurement of
masticatory forces and implant loads: a
methodologic clinical study. Int J Prosthodont
2002; 15(1): 20-27.
- Ikebe K, Nokubi T, Morii K, Kashiwagi J, Furuya M.
Association of bite force with ageing and occlusal
support in older adults. J Dent 2005; 33(2): 131- 137.
- Osman RB, Elkhadem AH, Ma S, Swain MV. Finite
element analysis of a novel implant distribution to
support maxillary overdentures. Int J Oral
Maxillofac Implants 2013; 28(1): 1-10.
- Lofaj F, Kučera J, Németh D, Kvetková L. Finite
element analysis of stress distributions in mono- and bi-cortical dental implants. Mat Science Eng
2015; 50: 85-96.
- Çelik E. Dinamik Yükleme Yapılan Kısa
İmplantlarda Kron/İmplant Oranının Stres Dağılımına Etkisinin İncelenmesi, Doktora Tezi, Ankara
Üniversitesi Sağlık Bilimleri Enstitüsü, Ankara
2012: 8-15.
- Sevimay M, Turhan F, Kiliçarslan M, Eskitascioglu
G. Three-dimensional finite element analysis of
the effect of different bone quality on stress
distribution in an implant-supported crown. J
Prosthet Dent 2005 ;93(3): 227-234.
- Wyatt C, Zarb GA. Treatment outcomes of patients
with implant-supported fixed partial prostheses,
Master thesis, University of Toronto, Toronto
1996.
- Das Neves FD, Fones D, Bernardes SR, do Prado CJ,
Neto AJF. Short implants--an analysis of
longitudinal studies. Int J Oral Maxillofac Implants
2006; 21(1): 86-93.
- Bahat O. Treatment planning and placement of
implants in the posterior maxillae: Report of 732
consecutive Nobelpharma implants. Int J Oral
Maxillofac Implants 1993; 8(2): 151-161.
- Block MS, Delgado A, Fontenot MG. The effect of
diameter and length of hydroxylapatite-coated
dental implants on ultimate pullout force in dog
alveolar bone. J Oral Maxillofac Surg 1990; 48(2):
174-178.
- Friberg B, Gröndahl K, Lekholm U, Brånemark PI.
Long‐term follow‐up of severely atrophic
edentulous mandibles reconstructed with short
branemark implants. Clin Implant Dent Relat Res
2000; 2(4): 184-189.
- Friberg B, Jemt T, Lekholm U. Early failures in
4,641 consecutively placed Brånemark dental
implants: A study from stage 1 surgery to the
connection of completed prostheses. Int J Oral
Maxillofac Implants 1991; 6(2): 27-35.