• Title/Summary/Keyword: osseointegration

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Osseointegration of dental implant in the mandible with diffuse sclerosing osteomyelitis: Report of a rare case (미만성 경화성 골수염을 동반한 하악에서 임플란트의 골유착)

  • Kang, Hyeon-Goo;Ko, Kyung-Ho;Huh, Yoon-Hyuk;Cho, Lee-Ra;Park, Chan-Jin
    • The Journal of Korean Academy of Prosthodontics
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    • v.59 no.3
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    • pp.314-318
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    • 2021
  • There are very few reports of the restoration of tooth loss using dental implants in patients with diffuse sclerosing osteomyelitis (DSO). Because the patients with DSO have unfavorable bone quality for osseointegration of dental implants, additional considerations such as surgical trauma, infection control, and an extended healing period are essential when placing dental implants. The purpose of this study is to report on the success of osseointegration of a dental implant in the patient with DSO.

Investigation of effect of zirconia on osseointegration by surface treatments (지르코니아 표면처리가 골유착에 미치는 영향)

  • Jeong, Jin-Woo;Song, Young-Gyun
    • Journal of Dental Rehabilitation and Applied Science
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    • v.37 no.1
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    • pp.23-30
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    • 2021
  • Purpose: The aim of this study was to investigate effect of zirconia on osseointegration and Surface appearance by surface treatments using various acid solution. Materials and Methods: The prepared zirconia disks were treated with hydrofluoric acid solution and photo-assisted etching under various condition. The surface was analyzed by SEM and the surface roughness was analyzed by using surface profiler. The osteogenic effect of MC3T3-E1 cells was assessed via fluorescent staining observation and reverse transcriptase-polymerase chain reaction (RT-PCR). Results: Various roughness were obtained according to the surface treatment method. The surface roughness increased in the group treated with hydrofluoric acid solution, but that had week network structure. In the method using photo-assisted etching, the surface roughness increased in micro units. Cell reaction showed better results in the photo-assisted etching group than in the hydrofluoric acid-treated group (P < 0.05). And it showed even osteoblastic cell distribution in photo-assisted etching group. Conclusion: As a result, the photo-assisted etching method is more effective than the simple acid solution treatment for zirconia treatment for osseointegration.

The influence of screw type and osseointegration ratio on stress distribution in two different endosseous implants

  • Han, Jung-Suk
    • The Journal of Korean Academy of Prosthodontics
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    • v.38 no.3
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    • pp.348-357
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    • 2000
  • The purpose of this study is to examine the effect of partial osseointegration situation on bone loading patterns around two different free-standing screw shaped implants (Nobel Biocare, Gothenburg, Sweden and Degussa-Huls, Hanau, German). Two dimensional axisymmetric Finite element models of two implants(10mm length and 4mm diameter) were created according to different bone quantity, quality and osseointegration ratio in maxilla and mandible bone. At the same time uni-cortical and hi-cortical fixation were analyzed. Generally, full bond case showed less stress than partial bond case in overall area and mandibular model showed less amount of stress than that of maxilla model. Maximum stress of the Branemark implant is higher than that of ANKYLOS regardless of bonding ratio at crestal and apex region. However, more stress concentration was noted in ANKYLOS implant at screw body area especially in mandible. The effect of bicortical fixation on crestal bone stress reduction is dramatical in mandible however, there was no significant effect in maxillary case. The effect of partial bond on stress distribution was more significant at screw body and apex region than in crestal region. Partial bond cases demonstrated greater stress accumulation in trabecular bone than cortical bone. It is concluded that the more accurate model of implant and bone which affects stress and strain distribution is needed to mimic in vivo behavior of implants.

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Effects of counter torque and transposition (transfer) of installed implants timing on their integration in dog tibia

  • Karimi, Mohammad Reza;Fathi, Shima;Ghanavati, Farzin
    • The Journal of Advanced Prosthodontics
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    • v.7 no.1
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    • pp.62-68
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    • 2015
  • PURPOSE. The purpose of this research was to evaluate the amount of reosseointegration after counter torquing (reverse torque) and transposing the installed implants at different times. MATERIALS AND METHODS. This study was done on ten tibiae of five cross-bred dogs. At the first day one implant was installed in each tibia. After one week half of the implants were randomly counter torqued (1WCT) and the other half were explanted and reimplanted in a new juxtaposition site (transposed)(1WT). At the same time three new implants were installed in each dog, one of them was considered as one week control (1WC) and remaining two as 8 week groups (8WCT&8WT). After eight weeks the 1WCT and 1WT implants were loosened by counter torque and the quantity of needed force for liberation was measured with the digital device (BGI). At the same time one implant was installed in each dog as eight week control (8WC) and the same protocol was repeated for 8 week groups after another 8 weeks. RESULTS. All implants were osseointegrated. Mean quantities of osseointegration in case groups indicated better amounts rather than control groups. CONCLUSION. Counter torque or transposition of the installed implants one week or eight weeks after the implantation did lead to osseointegration.

COMPARATIVE STUDY ON THE MARGINAL BONE LOSS OF IMMEDIATE NONSUBMERGED AND SUBMERGED ENDOSSEOUS DENTAL IMPLANTS PLACED INTO EXTRACTION SOCKETS OF DOGS (발치후 즉시 매식한 Nonsubmerged와 Submerged 임플랜트의 변연골 흡수양상에 관한 비교연구)

  • Yang, Jae-Ho
    • The Journal of Korean Academy of Prosthodontics
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    • v.35 no.2
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    • pp.255-264
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    • 1997
  • The conventional osseointegration protocol calls for waiting up to 12 months for ossification of an extraction socket to heal before placing an endosseous implant. In this study, the possibility of placing a pure titanium implant directly into an extraction socket immediately after extraction was investigated. And the marginal bone loss of immediate nonsubmerged and submerged endosseous dental implants placed into extraction sockets was also compared. Pure titanium Nobelpharma Branemark implants and solid screw type ITI implants were placed into premolar extraction sockets of two adult dogs and allowed to heal for a period of 3 months, followed by functional loading of the implant. Radiographic examination was performed before implantation, immediately after implantation and 3, 6, 9, 12 months after implantation. The results obtained were as follows : 1. Immediately placed nonsubmerged ITI implants and submerged Branemark implants showed favorable radiographic osseointegration status and there were minimum marginal bone loss. 2. There were no significant differences in radiographic finding of osseointegration between conventional and immediate implantation. 3. Gingival tissue around implants showed more inflammatory signs than that of adjacent natural teeth. This study suggest that pure titanium Branemark implants and submerged ITI implants have the potential to integrate when placed immediatly after extraction of the teeth and warrants further investigation.

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Experimental study about the bony healing of hydroxyapatite coating implants (수산화인회석 코팅 임프란트의 골치유과정에 관한 실험적 연구)

  • Eom, Tae-Gwan;Kim, Jong-Hwa;Cho, In-Hee;Jeong, Chang-Mo;Cho, Yong-Seok;Kim, Young-Kyun
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • v.37 no.4
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    • pp.295-300
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    • 2011
  • Introduction: Hydroxyapatite(HA) coating implant can accelerate osseointegration, however, there are many controversies. Materials and Methods: This study examined the early osseointegration of two types of hydroxyapatite coated implants. Twelve adult male miniature pigs (Medi Kinetics Micropigs, Medi Kinetics Co., Ltd., Busan, Korea) were used in this study. In the implants placed in the mandible, a histomorphometric evaluation was performed to evaluate the bone-implant contact (BIC) ratio. Results: The BIC ratio increased with time. TS III HA and Zimmer HA were not significantly different (P>0.05). At 8 weeks, the BIC of Zimmer HA was higher than TS III HA, but there was no significant difference (P>0.05). Conclusion: HA coated implants will accelerate early osseointegration.

A literature review on the survival rate of single implant-supported restorations (단일 임플란트 지지에 의한 보철물의 생존율에 관한 문헌 연구)

  • Chang, Moon-Taek
    • Journal of Periodontal and Implant Science
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    • v.32 no.1
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    • pp.69-87
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    • 2002
  • Implant material, implant design, surface quality, status of the bone, surgical technique, and implant loading conditions were regarded as prerequisites for osseointegration which is a prime condition for implant success. The aim of this review paper was to investigate the survival rate of single implants in relation to the prerequisites for osseointegration. Fifty-eight papers reporting survival rates of single implants were selected by use of the 'PubMed' and hand searching. The survival rate of single implants were assessed with reference to factors influencing osseointegration. The results showed that single implants in general showed a high survival rate except a few failures in certain extreme conditions and early stages. Those failures and complications such as screw loosening and esthetic problem were almost solved with the development of implant components and surgical techniques and a better understanding of biology around a single implant. Single-tooth implant-replacement is now considered as a reliable and predictable treatment option for a single missing tooth and its application seems to expand to compromised situations which were previously thought to be impossible for single implant therapy.

Effect of Low-Intensity Pulsed Ultrasound on Bone Healing around Titanium Implant in Tibia of Diabetes Mellitus Induced Rats (당뇨유도 백서 경골에 티타늄 임플란트 매식 시 저출력 초음파 적용이 골치유에 미치는 영향)

  • Seo, Young-Kyo;Kim, Uk-Kyu;Park, Sang-Jun;Lee, Soo-Woon;Kim, Yong-Deok;Hwang, Dae-Seok
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.34 no.3
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    • pp.163-172
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    • 2012
  • Purpose: Diabetes mellitus (DM) has been shown to alter the properties of the bone and impair bone healing around a titanium implant. The aim of this study is to investigate whether the low-intensity pulsed ultrasound (LIPUS), which has been known to stimulate the bone healing, improve the osseointegration of the titanium implant in tibia of DM-induced rats. Methods: 16 rats were received streptozotocin (60 mg/kg) for inducing diabetes. A total number of 32 titanium implants were placed bilaterally into both tibiae of these rats. The right tibia of each rat received LIPUS application (10 min/day) during 7 days post-operation, while the left side received no treatment. The study was carried on for six weeks and the rats were sacrificed at 1, 2, 4, and 6 weaks postoperatively (4 rats for each week) for histomorphometric and histologic analysis. Bone-implant contact and bone area were measured. Comparisons between the groups were made using statistical analysis on histomorphometric analysis. Results: The histomorphometry parameters showed that the bone-implant contact and the bone area values have decreased in the late osseointegration periods (4, 6 weeks) compared to the early osseointegration periods (1, 2 weeks) in both two groups. The bone-implant contact values of the LIPUS group were somewhat higher than those of controls at 1, 2 weeks, but the difference was not statistically significant. The bone area values of the LIPUS group were also higher than those of controls at 1, 2 weeks, but the difference was not statistically significant as well. Conclusion: Results of this study indicate that LIPUS may have positive effects on early osseointegration but could not improve the long term stability of dental implants.

AN EXPERIMENTAL STUDY ON THE OSSEOINTEGRATION OF THE TI-6AL-4V BEAD COATING IMPLANTS (Ti-6Al-4V 비드코팅 임프란트 시제품의 골유착에 대한 실험적 연구)

  • Woo, Jin-Oh;Park, Bong-Wook;Byun, June-Ho;Kim, Seung-Eon;Kim, Gyoo-Cheon;Park, Bong-Soo;Kim, Jong-Ryoul
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.30 no.1
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    • pp.52-59
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    • 2008
  • The geometric design of an implant surface may play an important role in affecting early osseointegration. It is well known that the porous surfaced implant had much benefits for the osseointegration and the early stability of implant. However, the porous surfaced implant had weakness from the transgingival contamitants, and it resulted in alveolar bone loss. The other problem identified with porous surface implant is the loss of physical properties resulting from the bead sintering process. In this study, we developed the new bead coating implant to overcome the disadvantages of porous surfaced implant. Ti-6Al-4V beads were supplied from STARMET (USA). The beads were prepared by a plasma rotating electrode process (PREP) and had a nearly spherical shape with a diameter of 75-150 ${\mu}m$. Two types of titanium implants were supplied by KJ Meditech (Korea). One is an external hexa system (External type) and the other is an internal system with threads (Internal type). The implants were pasted with beads using polyvinylalcohol solution as a binder, and then sintered at 1250 $^{\circ}C$ for 2 hours in vacuum of $10^{-5}$ torr. The resulting porous structure was 400-500 ${\mu}m$ thick and consisted of three to four bead layers bonded to each other and the implant. The pore size was in the range of 50-150 ${\mu}m$ and the porosity was 30-40 % in volume. The aim of this study was to evaluate the osseointegration of the newly developed dental implant. The experimental implants (n=16) were inserted in the unilateral femur of 4 mongrel dogs. All animals were killed at 8 weeks after implantation, and samples were harvested for hitological examination. All bead coated porous implants were successfully osseointegrated with peripheral bone. The average bone-implant contact ratios were 84.6 % (External type) and 81.5 % (Internal type). In the modified Goldner's trichrome staining, new generated mature bones were observed at the implant interface at 8 weeks after implantation. Although, further studies are required, we could conclude that the newly developed vacuum sintered Ti-6Al-4V bead coating implant was strong enough to resist the implant insertion force, and it was easily osseointegrated with peripheral bone.

INFLUENCE OF CIGARETTE SMOKE INHALATION ON DENTAL IMPLANT OSSEOINTEGRATION IN THE RAT (백서에 식립한 치과용 임플란트의 골유착에 흡연이 미치는 영향)

  • Kim, Se-Ho;Kim, Soung-Min;Kim, Ji-Hyuck;Park, Young-Wook;Park, Chan-Jin;Jung, Ki-Myoung;Lee, Suk-Keun
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • v.31 no.4
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    • pp.291-299
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    • 2005
  • Objectives : It is well known that cigarette smoking is harzardous to the osseointegration of dental implant, due to the impaired wound healing accompanied by reduced alveolar bone density. The aim of this study is to evaluate the influence of cigarette smoke on the implant osseointegration by the time factor consideration. Materials and methods : Twenty-four male Spraque-Dawley rats (8 weeks, weighting 200 to 250g) were used in this study. In the experimental group, 13 rats were exposed to cigarette smoke, 8 minutes per day during 6 weeks, and 12 rats in the control group were not exposed at any time. RBM (Resorbed blasting media) surfaced implant (diameter 3.3mm, length 5.0mm, AVANA Co., Korea) was placed in the right femur of each rat. Each implant with surrounding bone was prepared with microtome (cutting band 0.2mm$^{(R)}$, EXAKT Co., Germany) after 1 day, 2, 4, 8 and 12 weeks and stained with toluidine blue (1%). Another clinical investigation of each implant was also done at each evaluation time. Results : Clinical investigation around implant fixture showed that there were no significant differences between the control and experimental group. Microscopic observation around implant fixture showed that there were significant differences between the control and experimental group at the initial stage after implant fixture installation. Experimental group showed a decreased bone to implant contact within 4 weeks compared to control group, but showed similar characteristics after 4 weeks. Conclusion : Smoking inhalation effect on the dental implant showed the impaired wound healing by vasoconstriction and decreased intramedullary blood flow at initial stage of osseointegration. This experimental results can be clinically useful to the implant surgery of smoking patients.