• Title/Summary/Keyword: Dental Implantation

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Maxillo-mandibular Defect Reconstruction with Bilateral Free Fibula Flaps with Dental Implant Placement and Immediate Loading: A Case Report of the Three-team Approach

  • Nazarian, David;Dikarev, Aleksei;Mokhirev, Mikhail;Zakharov, Georgy;Fedosov, Alexander;Potapov, Maksim;Chernenkiy, Mikhail;Vasilev, Yuriy;Kyalov, Grigoriy;Chausheva, Saniyat;Khachatryan, Arbak;Tevosyan, Artur;Arakelyan, Gevorg
    • Archives of Plastic Surgery
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    • v.49 no.5
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    • pp.652-655
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    • 2022
  • Patients with advanced malignant tumors, including both jaws, is a challenging task for a head and neck surgeon. Current treatment landscape demonstrates good functional, anatomical, and aesthetic results in patients who could previously receive only palliative care. The extensive tissue defects resulting from oncological resections in the head and neck region require immediate reconstruction due to the exposure of vital structures and their contact with the external environment. A patient was operated using a three-team multidisciplinary approach involving simultaneous work of three specialized teams of maxillofacial and reconstructive microsurgeons, as well as an implantologist and a prosthodontist. This approach allowed simultaneous tumor resection with subsequent reconstruction of the intraoperative defect involving bilateral harvesting of two revascularized free fibular osteomusculocutaneous flaps with dental implantation and simultaneous rehabilitation of dentition with crowns.

The Effect of Platelet Derived Growth Factor - BB Loaded Chitosan/Calcium Metaphosphate on Bone Regeneration (혈소판유래성장인자를 함유한 Chitosan/Calcium Metaphosphate의 골조직재생효과에 관한 연구)

  • Lee, Seung-Yeol;Seol, Yang-Jo;Lee, Yong-Moo;Lee, Ju-Yeon;Lee, Seung-Jin;Kim, Suk-Young;Ku, Young;Rhyu, In-Chul;Han, Soo-Boo;Choi, Sang-Mook;Chung, Chong-Pyoung
    • Journal of Periodontal and Implant Science
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    • v.31 no.1
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    • pp.1-23
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    • 2001
  • Chitosan is biodegradable natural polymer that has been demonstrated its ability to improve wound healing, and calcium metaphosphate(CMP) is a unique class of phosphate minerals having a polymeric structure. In this study, chitosan/CMP and platelet derived growth factor(PDGF-BB) loaded chitosan/CMP sponges were developed, and the effect of the sponges on bone regeneration and their possibility as scaffolds for bone formation by three-dimensional osteoblast culture were examined. PDGF-BB loaded chitosan/CMP sponges were prepared by freeze-drying of a mixture of chitosan solution and CMP powder, and soaking in a PDGF-BB solution. Fabricated sponge retained its 3-dimensional porous structure with $100-200\;{\mu}m$ pores. The release kinetics of PDGF-BB loaded onto the sponge were measured in vitro with $^{125}I-labeled$ PDGF-BB. In order to examine their possibility as scaffolds for bone formation, fetal rat calvarial osteoblastic cells were isolated, cultured, and seeded into the sponges. The cell-sponge constructs were cultured for 28 days. Cell proliferation, alkaline phosphatase activity were measured at 1, 7, 14 and 28 days, and histologic examination was performed. In order to examine the effect on the healing of bone defect, the sponges were implanted into rat calvarial defects. Rats were sacrificed 2 and 4 weeks after implantation and histologic and histomorphometrical examination were performed. An effective therapeutic concentration of PDGF-BB following a high initial burst release was maintained throughout the examination period. PDGF-BB loaded chitosan/CMP sponges supported the proliferation of seeded osteoblastic cells as well as their differentiation as indicated by high alkaline phosphatase activities. Histologic findings indicated that seeded osteoblastic cells well attached to sponge matrices and proliferated in a multi-layer fashion. In the experiments of implantation in rat calvarial defects, histologic and histomorphometric examination revealed that chitosan/CMP sponge promoted osseous healing as compared to controls. PDGF-BB loaded chitosan/CMP sponge further echanced bone regeneration. These results suggested that PDGF-BB loaded chitosan/CMP sponge was a feasable scaffolding material to grow osteoblast in a three-dimentional structure for transplantation into a site for bone regeneration.

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Surface Characteristics and Electrochemical Behaviors of TiN and ZrN Coated Orthodontic Mini-screw (ZrN 및 TiN 코팅된 치과교정 용 미니나사의 표면특성과 전기화학적 거동)

  • Kim, S.J.;Moon, Y.P.;Park, G.H.;Jo, H.H.;Kim, W.G.;Son, M.K.;Choe, H.C.
    • Journal of the Korean institute of surface engineering
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    • v.41 no.5
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    • pp.232-239
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    • 2008
  • The dental orthodontic mini-screw requires good mechanical properties and high corrosion resistance for implantation in the bone. The purpose of this study was to investigate the electrochemical characteristics of TiN and ZrN coated orthodontic mini-screws, mini-screws were used for experiment. Ion plating was carried out for mini-screw using Ti and Zr coating materials with nitrogen gas. Ion plated surface of each specimen w as o bserved with f ield emission scanning e lectron microscopy ( FE-SEM), e nergy dispersive x-ray spectroscopy (EDX), and electrochemical tester. The surface of TiN and ZrN coated mini-screw were more smooth than that of other kinds of non-coated mini-screw due to dercrease of machined defects. The corrosion current density of the TiN and ZrN coated mini-screw decreased compared to non-coated sample. The corrosion potential of TiN and ZrN coated mini-screw were higher than that of non-coated mini-screw in 0.9% NaCl solution. The pitting corrosion resistance increased in the order of ZrN coated, TiN coated and non-coated wire. Pitting potential of ZrN coated mini-screw was the highest in the other specimens.

MAXILLARY SINUS ELEVATION PROCEDURES: A Report of Six Cases (상악동거상술 및 임플란트매식에 의한 상악 구치부 수복에 관한 임상적 연구)

  • Lee, Dong-Han
    • The Journal of Korean Academy of Prosthodontics
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    • v.33 no.2
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    • pp.300-316
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    • 1995
  • Methods for restoring the posterior portion of the maxilla with delayed and simultaneous sinus lift, composite graft and placement of TPS cylinder and screw type implants are presented. Sinus grafting is needed because of minimal remaining alveolar bone and supporting posterior maxillary portion, The composite graft material uses a combination of autogeneous bone from tuberosity, dimeneralized freeze dried allogenic bone and hydroxylapatite with saline. Since 1991, feb, 1 sinus graft with delayed implantation of 3 cylinder implants and 5 sinus grafts with simultaneous placement of 4HA coated screw typed, 8 TPS cylinder typed implants have been performed for 6 patients. None of the 15 restored implants have been lost, Temporization of prosthesis was done about 2-5 months before final prosthetic work, None of them shows any severe complication.

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Mandibular Posterior Rehabilitation Case after Occlusal Plane Correction using Micro-Implant Anchorage (Micro-Implant를 이용한 교정치료로 교합평면 개선 후 하악 구치부 수복증례)

  • Park, Ju-Mi
    • Journal of Dental Rehabilitation and Applied Science
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    • v.20 no.2
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    • pp.143-150
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    • 2004
  • Endosseous implants have been used to provide anchorage control in orthodontic treatment without the need for special patient cooperation. However these implants have limitation like space requirement, cost, equipments. Recently titanium micro-implant for orthodontic anchorage was introduced. Micro-implants are small enough to place in any area of the alveolar bone, easy to implant and remove, and inexpensive. In addition, orthodontic force application can begin almost immediately after implantation. The mandibular first, maxillary first, mandibula second, and maxillary second molars were the four most commonly missing teeth in adult sample. In case of posterior molar teeth missing, deflective contacts in any position, over time, has produced pathologic change of occlusal scheme because of extrusion of opposing teeth. This case had interocclusal space deficiency by mandibular right molars missing over time. The micro-implants had been used for intrusion of maxillary right molars for interocclusal space. The micro-implant would be absolute anchorage for orthodontic movement. Therefore, the micro-implant would be effective method for correction of occlusal plane.

THE CLINICAL STUDY OF IMPLANTATION OF TOOTHASH COMBINED WITH PLASTER OF PARIS;LONG-TERM FOLLOW UP STUDY (치아회분과 석고 혼합매식물 이식에 관한 임상적 연구;장기간 추적 연구)

  • Kim, Su-Gwan;Yeo, Hwan-Ho;Kim, Young-Kyun
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.18 no.4
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    • pp.771-777
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    • 1996
  • This study was undertaken to access the effect of toothash combined with plaster of Paris in the filling of jaw defect and the substitution as new bone during the follow up period. We used the toothash and plaster after the cyst enucleation, the apicoectomy, the extraction of supenumerary tooth with ratio of 2 : 1 by weigh. 15 consecutive patients were evaluated retrospectively. Complications were swelling, perforation, infection and treated without problems using incision & drainage, aspiration, antibiotic treatment, 2ndary buccal flap. The follow-up period ranged from 28 to 35 months. Based on radiographic and clinical observation, it may be concluded that toothash and dental plaster of Paris($CaSo_4\;{\cdot}\;1/2H_2O$) are useful for bone substitute.

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Life-threatening airway obstruction after flapless implant placement in the anterior mandible

  • Kim, Jin-Hong;Park, Hee-Keun;Kim, Moon-Key;Kang, Sang-Hoon
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • v.38 no.5
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    • pp.310-313
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    • 2012
  • This paper reports a patient who had an airway obstruction caused by a hemorrhage of the mouth floor that occurred after she underwent flapless implantation in the region of the mandibular anterior teeth. The hemorrhage may have been caused by iatrogenic malpositioned fixture and patient's hypertension. The lingual periosteum was not dissected during the flapless procedure. Therefore, when hemorrhage occurred, the blood did not drain easily into the oral cavity but instead drained into the deep neck region, which might have been the cause of the airway obstruction.

AUTOTRANSPLANTATION OF THE MISSING TOOTH : THE REPORT OF CASES (결손치에서의 자가치아이식의 치험례)

  • Park, Jeong-Hoon;Kim, Woo-Taek;Min, Byeong-Jin;Lee, Won-Hak;Lee, Jeong-Gu
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • v.28 no.6
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    • pp.480-483
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    • 2002
  • Treatments for restoring the function and esthetics of missing teeth include fixed bridge, partial denture, orthodontic movement, implantation and autotransplantation. However, there is no absolute indications for each techniques. Due to undevelopment of root and root resorption after autotransplantation, the success rate of autotransplantation over the past decades have been low. Recently. with the study on biological principles of the healing of periodontal ligament, the success rate of autotransplantation began to improve. We report the cases of successful autotransplantation which resulted in ideal healing of periodontal ligament, gingiva and alveolar bone.

ANTERIOR ESTHETIC IMPROVEMENT THROUGH ORTHODONTIC EXTRUSIVE REMODELING AND SINGLE-UNIT IMPLANTATION IN A FRACTURED UPPER LATERAL INCISOR WITH ALVEOLAR BONE LOSS: A CASE REPORT (치은연하 파절로 치조골 소실을 동반한 상악측절치에서 orthodontic extrusive remodeling후 임플란트 식립을 통한 심미수복: 증례보고)

  • Hwang, Soo-Youn;Shon, Won-Jun;Han, Young-Chul;Bae, Kwang-Shik;Back, Seung-Ho;Lee, Woo-Cheol;Kum, Kee-Yeon
    • Restorative Dentistry and Endodontics
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    • v.33 no.1
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    • pp.39-44
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    • 2008
  • The treatment of esthetic areas with single-tooth implants represents a new challenge for the clinician. In 1993, a modification of the forced eruption technique, called "orthodontic extrusive remodelling," was proposed as a way to augment both soft- and hard-tissue profiles at potential implant sites. This case report describes augmentation of the coronal soft and hard tissues around a fractured maxillary lateral incisor associated with alveolar bone loss, which was achieved by forced orthodontic extrusion before implant placement. Through these procedures we could reconstruct esthetics and function in a hopeless tooth diagnosed with subgingival root fracture by trauma.

Corrosion behaviors of Cp-Ti and Ti-6Al-4V alloys by TiN coating (TiN 코팅된 Ti 및 Ti-6Al-4V합금의 부식거동)

  • Lee, Soon-Hyun;Jung, Yoong-Hun;Choi, Han-Chul;Ko, Yeong-Mu
    • Journal of Technologic Dentistry
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    • v.30 no.1
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    • pp.25-31
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    • 2008
  • Cp-Ti and Ti-6Al-4V alloys commonly used dental implant materials, particularly for orthopaedic and osteosynthesis because of its suitable mechanical properties and excellent biocompatibility. This alloys have excellent corrosion behavior in the clinical environment. The first factor to decide the success of dental implantation is sufficient osseointegration and high corrosion resistance between on implant fixture and its surrounding bone tissue. In this study, in order to increase corrosion resistance and biocompatibility of Cp-Ti and Ti-6Al-4V alloy that surface of manufactured alloy was coated with TiN by RF-magnetron sputtering method. The electrochemical behavior of TiN coated Cp-Ti and Ti-6Al-4V alloy were investigated using potentiodynamic (EG&G Co, PARSTAT 2273. USA) and potentiostatic test (250mV) in 0.9% NaCl solution at 36.5 $\pm$ 1$^{\circ}C$. These results are as follows : 1. From the microstructure analysis, Cp-Ti showed the acicular structure of $\alpha$-phase and Ti-6Al-4V showed the micro-acicular structure of ${\alpha}+{\beta}$ phase. 2. From the potentiodynamic test, Ecorr value of Cp-Ti and Ti-6Al-4V alloys showed -702.48mV and -319.87mV, respectively. Ti-6Al-4V alloy value was higher than Cp-Ti alloy. 3. From the analysis of TiN and coated layer, TIN coated surface showed columnar structure with 800 nm thickness. 4. The corrosion resistance of TiN coated Cp-Ti and Ti-6Al-4V alloys were higher than those of the non-coated Ti alloys in 0.9% NaCl solution from potentiodynamic test, indicating better protective effect. 5. The passivation current density of TiN coated Cp-Ti and Ti-6Al-4V alloys were smaller than that of the noncoated implant fixture in 0.9% NaCl solution, indicating the good protective effect resulting from more compact and homogeneous layer formation.

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