Autologous tooth transplantation has been used in various indications to replace missing teeth. In this case series, we investigated the long-term outcomes following immediate tooth autotransplantation into fresh extraction sockets in young individuals in our center. A consecutive retrospective study was conducted on patients treated at the clinic of Oral and Plastic Maxillofacial Surgery at Ludwigshafen hospital in Germany. Demographic factors, indication for tooth autotransplantation, donor site, and recipient site were extracted from patient records. The clinical and radiographic outcomes of 11 autotransplanted teeth were evaluated in a follow-up observation period ranging from 20 to 78 months. A total of 11 tooth transplantations were carried out in nine patients during the study period. Chronic apical periodontitis, non-restorable extended caries, hypodontia, ectopical eruption and accidental trauma were the reasons for tooth transplantation. Overall, nine third molars, one second molar, and one canine were autotransplanted. Donor teeth were mandibular third molars in seven cases, maxillary third molars in two cases, a maxillary second molar in one case, and a maxillary canine in one case. Six donor teeth had completely formed roots and five had incompletely developed roots and an open apex at the time of surgery. After a mean follow-up of 44 months, 10 cases (90.9%) were successful; one case failed because of root resorption and uneventful bone remodeling. In four cases, external root resorption was observed. No pulp revascularization was observed during the recall period. The survival rate and success rate of tooth autotransplantation were 90.9% and 63.6%, respectively. Our results are in agreement with other published observations. We conclude that autologous tooth transplantation into fresh extraction sockets in young individuals has a high long-term success rate. Although the indications for autotransplantation are quite narrow, careful patient selection coupled with an appropriate surgical technique can lead to exceptional long-term functional results.

Introduction: Odontogenic foci may result to generalized infections spreading the bacteria through contiguous anatomic cavities or hematogenous spread. The most reported secondary infections caused by oral pathogens are intracranial abscesses. Although, few reports in the literature describe the bacterial spread to extracranial locations. Case description: We describe the case of a 52-year-old male Caucasian patient who was admitted to our hospital suffering from severe sepsis caused by a submandibular abscess. Eggerthia catenaformis was detected in blood and abscess material (confirmed by MALDI-TOF mass spectrometry). The patient subsequently developed a perihepatic abscess and colon perforation, and was stabilized after several surgical interventions. He remained hospitalized for 66 days receiving intravenous antibiotics. Five months later, jaw osteonecrosis with Actinomyces contamination was detected in the left mandible, which also had to be treated surgically. Three years after the last surgery, no signs of recurrence have been detected. Discussion: Oral and maxillofacial surgeons should understand the characteristics of systemic infections, in which the potentially causal intraoral odontogenic foci often lack acute symptoms. If other origins of infection are not detected, elimination of the potentially causal odontogenic foci should be performed. However, the decision making criteria to eliminate suspected causal teeth is needed to be elucidated through more studies.

Introduction: Medication-related osteonecrosis of the jaw (MRONJ) is a serious complication in patients receiving antiresorptive medication, such as bisphosphonates and denosumab, for different oncologic and non-oncologic diseases. Here, we report a case of MRONJ in a patient treated with tocilizumab, a humanized anti-interleukin-6 receptor antibody that effectively treats moderate to severe rheumatoid arthritis in adults. Case description: A 45-year-old female patient diagnosed with severe rheumatoid arthritis, who had been undergoing intravenous tocilizumab therapy for three years without history of bisphosphonate use, was referred to our department. Four weeks previously, several teeth in the maxilla and mandible were removed under local anesthesia by her dentist. Two weeks after the extractions, she felt pain in both jaws. We diagnosed wound dehiscence and delayed healing of the alveolar bone after the tooth extractions. Digital volume tomography showed persistent dry alveolar sockets. The patient underwent surgical debridement of necrotic bone, and intravenous antibiotics were administered in hospital. Five months later, wound dehiscence reoccurred in the same regions. Histopathological analysis of bone biopsies revealed a diagnosis of MRONJ. Four months later, wound dehiscence occurred in the left maxillary alveolar ridge, and local bone resection was performed under antibiotic treatment. Twenty-four months after the last surgery, wound dehiscence had healed completely without signs of recurrence. Discussion: Osteomyelitis of the jaw in patients treated with tocilizumab has not been reported often. This case confirms the potential role of this interleukin-6 receptor inhibitor in the pathogenesis of MRONJ and shows that patients who receive tocilizumab with MRONJ-like symptoms should be closely monitored. The pathomechanism of MRONJ under tocilizumab therapy remains unclear, so dental practitioners, maxillofacial surgeons, and rheumatologists should look for signs of MRONJ in patients receiving tocilizumab to prevent MRONJ onset.

Background: Total or subtotal glossectomies are associated with significant functional impairment thus can be considered as the last frontier in the surgical therapy of oral malignancies. However, the advancement in microvascular surgery especially regarding the use of re-innervated free flaps may provide a valuable solution for this dilemma.

The current surgical techniques used in cleft repair are well established, but different centers use different approaches. To determine the best treatment for patients, a multi-center comparative study is required. In this study, we surveyed all craniofacial departments registered with the German Society of Maxillofacial Surgery to determine which cleft repair techniques are currently in use. Our findings revealed much variation in cleft repair between different centers. Although most centers did use a two-stage approach, the operative techniques and timing of lip and palate closure were different in every center. This shows that a retrospective comparative analysis of patient outcome between the participating centers is not possible and illustrates the need for prospective comparative studies to establish the optimal technique for reconstructive cleft surgery.

Die aktinische Keratose ist eine durch chronische ultraviolette Strahlung verursachte fakultative Präkanzerose. Sie tritt am häufigsten im Kopf-Hals-Bereich auf. Derzeit werden in Deutschland geschätzt etwa 1,7 Mio. Patienten pro Jahr mit einer aktinischen Keratose behandelt. Inzidenz und Prävalenz sind stark steigend. Die Therapie der Wahl ist die vollständige chirurgische Entfernung der Läsion. An der Unterlippe geschieht dies in der Technik des „lip shave“ unter Entfernung des gesamten Lippenrots. Zur Rekonstruktion der Unterlippe bietet sich bei dieser Defektsituation entweder eine labiale vestibuläre Mukosaverschiebeplastik aus der Innenseite der Unterlippe oder eine beidseitige Mukosaverschiebeplastik aus dem Planum buccale an. In diesem Beitrag werden beide Techniken dargestellt und diskutiert.

Customized implants have simplified surgical procedures and have improved patient outcome in craniomaxillofacial surgery. Traditionally, patient-specific data is gathered by conventional computed tomography (CT). However, cone-beam CT (CBCT) can generate a 3D reconstruction of the area of interest with a lower dose of radiation at reduced cost. In this study, we investigated the feasibility of using CBCT data to design and generate customized implants for patients requiring craniomaxillofacial reconstruction. We used CBCT to generate 62 implants for 51 consecutive patients admitted to our department between January 2015 and December 2017. The indications for reconstruction and types of reconstruction were very variable. In all cases, the implants were well fitted and no implant-related complications were detected. Pre-surgical planning was faster and more efficient as we did not have to consult a radiologist. Although CBCT data is more difficult to process than conventional CT data for the implant provider, the clinical advantages are pronounced and we now use CBCT as standard in our department. In conclusion, we have shown that using CBCT to design and manufacture customized implants for reconstruction of the craniomaxillofacial area is feasible and recommend this approach to other departments.

Orthognathic surgery has always been a classical focus of maxillofacial surgery. Since more than 100 years, various surgical techniques for mandibular repositioning have been developed and clinically tested. Since the establishment of plate and screw osteosynthesis, orthognathic surgery became more stable and safe. Nowadays, different surgical methods for mobilising the mandible are existing. This international multicenter analysis (n = 51 hospitals) is providing first evidence based data for the current use of different surgical methods. The dominating techniques were Obwegeser/dal Pont (61%) followed by Hunsuck/Epker (37%) and Perthes/Schlössmann (29%). The main osteosynthesis materials were plates (82%), bicortical screws (23.5%), or a combination of both (5.9%). 47% of all centers reported to use several surgical methods at the same time, depending on the anatomical problem and the surgeon's preference. This shows that different surgical methods seem to work as comparable, safe, and reliable procedures in everydays clinical practise. On this basis, further prospective studies could evaluate possible advantages for our patients.

Thiele, Oliver C. MD, DDS; Knape, Uta MD, DDS; Mischkowski, Robert A. MD, DDS; Kreppel, Matthias MD, DDS; Rothamel, Daniel MD, DDS; Zöller, Joachim E. MD, DDS Author Information

Even though modern surgical techniques are dominating reconstructive facial procedures, the capability to use facial epitheses for reconstruction is still an important skill for the maxillofacial surgeon. We present an international multicenter analysis to clarify which techniques are used to fixate facial prostheses. We contacted all maxillofacial departments in Germany, Austria, Switzerland and Norway which were registered with the German society for oral and maxillofacial surgery (DGMKG). These centers were asked via electronical mail to provide information on the type of epithesis fixation systems currently in use. The return rate from 58 departments was 43.1% (n = 25). Overall, implant fixation was the preferred fixation system (92%). Plates were the second most common fixation technique (32%). No centers reported the standard use of non-invasive fixation techniques for permanent epithesis fixation. The main retention systems in use were magnets (24/25), other retention systems are used much less often. The current preferred fixation technique for facial epitheses consists of implant-based, magnet-fixated epitheses. For nasal prostheses, a plate-based, magnet-fixated system is often used.

Implant treatment increasingly focuses on the reduction of treatment time and postoperative impairment. The improvement of 3D dental diagnosis by ConeBeam computed tomography allows detailed preparation for the surgical placement of dental implants under prosthetic considerations. While the first generation of implant planning software used high-contrast multislice computed tomography, software that has been specifically designed for ConeBeam computed tomography is now available. Implant placement can be performed using surgical guides or under the control of optical tracking systems. Surgical guides are more commonly used in private office owing to their availability. The accuracy for both techniques is clinically acceptable for achieving implant placement in critical anatomical indications. When using prefabricated superstructures and in flapless surgery, special abutments or an adjusted workflow are still necessary to compensate misfits of between 150 and 600 pm. The proposition to ensure proper implant placement by dentists with limited surgical experience through the use of surgical guides is unlikely to be successful, because there is also a specific learning curve for guided implant placement. Current and future development will continue to decrease the classical laboratory-technician work and will integrate the fabrication of superstructures with virtual treatment planning from the start.

Auricular cartilage is an important source of grafts for various reconstructive procedures such as aesthetic rhinoplasty. The purpose of this investigation was to compare tragal cartilage with auricular cartilage harvested from the concha and scapha, and describe its clinical viability, indications, and morbidity in rhinoplasty. A total of 150 augmentation rhinoplasties with a total of 170 grafts were included. The donor sites were tragus (n=136), concha (n=26), and scapha (n=8). The time needed to harvest the grafts, the donor site morbidity, and the indications for operation were recorded. The anthropometric changes to 4 auricular variables after the cartilage had been harvested were analysed and compared with those on the opposite side in 48 patients using Student's paired t-test. Intraobserver reliability was assessed using Pearson's intraclass correlation. The mean (SD) harvesting time was 27 (8) min for the concha, 4.5 (1.4) min for the tragus, and 5.7 (1.6) min for the scapha. The largest graft was taken from the concha (28×19mm), followed by the tragus (20×12mm), and the scapha (18×6mm). The grafts were placed at the following sites: tip grafts (n=123), columella struts (n=80), shield (n=20), rim (n=17), and dorsal onlay (n=15). Harvesting tragal cartilage is safe, simple, fast, and has a low morbidity, but it can affect the patient's ability to wear earphones. Tragal cartilage is a good alternative for nasal reconstruction if a graft of no longer than 20mm is required.

Basal cell carcinoma of the skin is the most common malignancy in the head and neck area. Regional and distant metastases rarely occur with this type of tumour. We report an uncommon case of a sclerodermiform basal cell carcinoma of the facial skin in which metastases developed several years after the primary tumour. The metastases occurred in the soft tissue of the neck, the thyroid gland and the lung. This is the first case of BCC with triple metastases which were histologically confirmed.

There may well be a shift towards 3-dimensional orthognathic surgery when virtual surgical planning can be applied clinically. We present a computer-assisted protocol that uses surgical navigation supplemented by an interactive image-guided visualisation display (IGVD) to transfer virtual maxillary planning precisely. The aim of this study was to analyse its accuracy and versatility in vivo. The protocol consists of maxillofacial imaging, diagnosis, planning of virtual treatment, and intraoperative surgical transfer using an IGV display. The advantage of the interactive IGV display is that the virtually planned maxilla and its real position can be completely superimposed during operation through a video graphics array (VGA) camera, thereby augmenting the surgeon's 3-dimensional perception. Sixteen adult class III patients were treated with by bimaxillary osteotomy. Seven hard tissue variables were chosen to compare (ΔT1-T0) the virtual maxillary planning (T0) with the postoperative result (T1) using 3-dimensional cephalometry. Clinically acceptable precision for the surgical planning transfer of the maxilla (<0.35 mm) was seen in the anteroposterior and mediolateral angles, and in relation to the skull base (<0.35°), and marginal precision was seen in the orthogonal dimension (<0.64 mm). An interactive IGV display complemented surgical navigation, augmented virtual and real-time reality, and provided a precise technique of waferless stereotactic maxillary positioning, which may offer an alternative approach to the use of arbitrary splints and 2-dimensional orthognathic planning.

Purpose: Implant placement in the edentulous anterior mandible is frequently performed to stabilize prosthetic superstructures. The position of the inferior alveolar nerve (IAN), especially in an atrophic mandible, has to be considered to position implants properly. In this study, the prevalence of looping of the IAN was retrospectively determined to assess the need for imaging prior to implant placement in the anterior mandible. Materials and Methods: Cone beam computed tomography scans of consecutive patients were evaluated to assess the prevalence and size of IAN looping. The results were compared with respect to patient age and sex as well as degree of atrophy and bone height at the mental foramen. Results: Scans of 1,010 patients were obtained. IAN loops were found in 31% of the patients, with a significantly higher prevalence in male patients (33.1%) than in female patients (28.1%). The average size of loops was 1.4 +/- 0.70 mm, with a maximum of 4.6 mm. For male patients, the average loop size was 1.6 +/- 0.74 mm (maximum 4.6 mm), and for female patients an average dimension of 1.4 +/- 0.63 mm (maximum 4.4 mm) was recorded. This difference was significant (t test). A significant difference with respect to the various classes of atrophy up to class 4 was not found. Conclusion: Loops of the IAN occur in about one third of patients and vary in size from 0.7 to 4.6 mm. Large anterior loops put the IAN at risk when interforaminal implants are placed. Either a sufficient safety distance or three-dimensional imaging procedures should be used to detect loops and locate the incisive canal, which could be harmed during the interforaminal implant placement. INT J ORAL MAXILLOFAC IMPLANTS 2012;27:1014-1021

Objective. We present a virtual planning protocol incorporating a patented 3-surgical splint technique for orthognathic surgery. The purpose of this investigation was to demonstrate the feasibility and validity of the method in vivo.Materials and Methods. The protocol consisted of (1) computed tomography (CT) or cone-beam computed tomography (CBCT) maxillofacial imaging, optical scan of articulated dental study models, segmentation, and fusion; (2) diagnosis and virtual treatment planning; (3) computed-assisted design and manufacture (CAD/CAM) of the surgical splints; and (4) intraoperative surgical transfer. Validation of the accuracy of the technique was investigated by applying the protocol to 8 adult class III patients treated with bimaxillary osteotomies. The virtual plan was compared with the postoperative surgical result using image fusion of CT/CBCT dataset by analysis of measurements between hard and soft tissue landmarks relative to reference planes.Results. The virtual planning approach showed clinically acceptable precision for the position of the maxilla (<0.23 mm) and condyle (<0.19 mm), marginal precision for the mandible (<0.33 mm), and low precision for the soft tissue (<2.52 mm).Conclusions. Virtual diagnosis, planning, and use of a patented CAD/CAM surgical splint technique provides a reliable method that may offer an alternate approach to the use of arbitrary splints and 2-dimensional planning. (Oral Surg Oral Med Oral Pathol Oral Radiol 2012;113:673-687)

| Full Text PDF File | Order Article | E-mail Abstract 5 . Effect of Implant Position, Angulation, and Attachment Height on PeriImplant Bone Stress Associated with Mandibular Two-Implant Overdentures: A Finite Element Analysis Authors: Hae Ryong Hong, DMD, MSD, PhD/Ahran Pae, DMD, MSD, PhD/Yooseok Kim, BS/Janghyun Paek, 11/1/12 3:22 PM The International Journal of Oral & Maxillofacial Implants: Volume 27, Issue 5 (September/October 2012) Page 2 sur 6 http://www.quintpub.com/journals/omi/journal_contents.php?iss_id=1070&journal_name=OMI&vol_year=2012&vol_num=27#.UJKFZnNWk0s Authors: Hae Ryong Hong, DMD, MSD, PhD/Ahran Pae, DMD, MSD, PhD/Yooseok Kim, BS/Janghyun Paek, DMD, MS/Hyeong-Seob Kim, DMD, MSD, PhD/Kung-Rock Kwon, DMD, MSD, PhD Pages: e69–e76 PMID: 23057045 Abstract | Full Text PDF File | Order Article | E-mail Abstract 6 . Comparison of Heat Generated by Alumina-Toughened Zirconia and Stainless Steel Burs for Implant Placement Authors: Luis Fernando S. Pires, DMD, MSD/Bernard Tandler, PhD/Nabil Bissada, DDS, MSD/Sillas Duarte, Jr, DDS, MS, PhD Pages: 1023–1028 PMID: 23057014 Abstract | Full Text PDF File | Order Article | E-mail Abstract 7 . Osteogenic Potential of Bone Marrow Stromal Cells on Smooth, Roughened, and Tricalcium Phosphate–Modified Titanium Alloy Surfaces Authors: John S. Colombo, BSc, PhD/Albert Carley, BSc, PhD/Garry J. P. Fleming, BSc, PhD/St. John Crean, BDS, PhD/Alastair J. Sloan, BSc, PhD/Rachel J. Waddington, BSc, PhD Pages: 1029–1042 PMID: 23057015 Abstract | Full Text PDF File | Order Article | E-mail Abstract 8 . Decontamination of Titanium Implant Surface and Re-osseointegration to Treat Peri-Implantitis: A Literature Review Authors: Karthikeyan Subramani, BDS, MSc/Daniel Wismeijer, DDS, PhD Pages: 1043–1054 PMID: 23057016 Abstract | Full Text PDF File | Order Article | E-mail Abstract 9 . Influence of Diamondlike Carbon–Coated Screws on the ImplantAbutment Interface Authors: Juliana Socas Vanoni Diez, MSc/Vinicius Carvalho Brigagão, MSc/Leonardo Gonçalves Cunha, PhD/Ana Christina Claro Neves, PhD/Laís Regiane da Silva-Concílio, PhD Pages: 1055–1060 PMID: 23057017 Abstract | Full Text PDF File | Order Article | E-mail Abstract 10 . Effectiveness of Screw Surface Coating on the Stability of Zirconia Abutments After Cyclic Loading Authors: Mariana de Almeida Basílio, DDS/Luis Eduardo Butignon, DDS, MSc/João Neudenir Arioli Filho, DDS, MSc, PhD Pages: 1061–1067 PMID: 23057018 Abstract | Full Text PDF File | Order Article | E-mail Abstract 11 . Stress Distribution and Micromotion Analyses of Immediately Loaded Implants of Varying Lengths in the Mandible and Fibular Bone Grafts: A Three-Dimensional Finite Element Analysis Authors: Jacqueline Chia-Hsuan Wu, BDSc, MDSc/Chen-Sheng Chen, PhD/Shing-Wai Yip, DDS, MS/Ming-Lun Hsu, DDS, Dr Med Dent Pages: e77–e84 PMID: 23057046 Abstract | Full Text PDF File | Order Article | E-mail Abstract 12 . Comparison of the Effects of Phosphate-Coated and Sandblasted Acid-Etched Titanium Implants on Osseointegration: A Microcomputed Tomographic Examination in the Canine Model Authors: Stephen S. Walker, DDS/Elias D. Kontogiorgos, DDS, PhD/Paul C. Dechow, PhD/David G. Kerns, DMD, MS/Carl J. Nelson, PhD/Lynne A. Opperman, PhD Pages: 1069–1080 PMID: 23057019 Abstract | Full Text PDF File | Order Article | E-mail Abstract 13 . Effects of Coating a Titanium Alloy with Fibronectin on the 11/1/12 3:22 PM The International Journal of Oral & Maxillofacial Implants: Volume 27, Issue 5 (September/October 2012) Page 3 sur 6 http://www.quintpub.com/journals/omi/journal_contents.php?iss_id=1070&journal_name=OMI&vol_year=2012&vol_num=27#.UJKFZnNWk0s Expression of Osteoblast Gene Markers in the MC3T3 Osteoprogenitor Cell Line Authors: Bruce E. Rapuano, PhD/Kyle M. Hackshaw, BS/Hannes C. Schniepp, PhD/Daniel E. MacDonald, DMD, MSD Pages: 1081–1090 PMID: 23057020 Abstract | Full Text PDF File | Order Article | E-mail Abstract 14 . Analysis of the Bacterial Seal at the Implant-Abutment Interface in External-Hexagon and Morse Taper–Connection Implants: An In Vitro Study Using a New Methodology Authors: Mario Eduardo Jaworski, DDS/Ana Cláudia Moreira Melo, PhD/Cyntia Maria Telles Picheth, PhD/Ivete Aparecida de Mattias Sartori, PhD Pages: 1091–1095 PMID: 23057021 Abstract | Full Text PDF File | Order Article | E-mail Abstract 15 . The Effect of Globin Scaffold on Osteoblast Adhesion and Phenotype Expression In Vitro Authors: Ahmad A. Hamdan, BDS, MSc/Sabine Loty, DDS, MSc, PhD/Juliane Isaac, MSc/Jean-Louis Tayot, PhD/Philippe Bouchard, DDS, MSc, PhD/Ameen Khraisat, BDS, PhD/Ariane Bedral, DDS, MSc, PhD/Jean-Michel Sautier, DDS, MSc, PhD Pages: 1096–1105 PMID: 23057022 Abstract | Full Text PDF File | Order Article | E-mail Abstract 16 . Influence of Abutment Height and Thermocycling on Retrievability of Cemented Implant-Supported Crowns Authors: Christian Mehl, Dr Med Dent/Sönke Harder, Dr Med Dent/Ahoo Shahriari/Martin Steiner, Dr Rer Nat/Matthias Kern, Prof Dr Med Dent Pages: 1106–1115 PMID: 23057023 Abstract | Full Text PDF File | Order Article | E-mail Abstract 17 . Effect of Platform Switching on Collagen Fiber Orientation and Bone Resorption Around Dental Implants: A Preliminary Histologic Animal Study Authors: Xavier Rodríguez, MD, PhD/Xavier Vela, MD, DDS/José Luis Calvo-Guirado, DDS, PhD, MS/José Nart, DDS, PhD/Christian F. J. Stappert, DDS, MS, PhD Pages: 1116–1122 PMID: 23057024 Abstract | Full Text PDF File | Order Article | E-mail Abstract 18 . Hydroxyapatite-Coated Oral Implants: A Systematic Review and Meta-Analysis Authors: Nabeel H. M. Alsabeeha, DMD, MSc, MFDS RCPS, PhD/Sunyoung Ma, BDS, DClinDent/Momen A. Atieh, BDS, MSc, PhD Pages: 1123–1130 PMID: 23057025 Abstract | Full Text PDF File | Order Article | E-mail Abstract 19 . Distal Cantilevers and Implant Dentistry Authors: Georgios E. Romanos, DDS, PhD, Prof Dr med dent/Bhumija Gupta, BDS/Steven E. Eckert, DDS, MS Pages: 1131–1136 PMID: 23057026 Abstract | Full Text PDF File | Order Article | E-mail Abstract 20 . Immediate and Delayed Restoration of Dental Implants in Patients with a History of Periodontitis: A Prospective Evaluation up to 5 Years Authors: Jacob Horwitz, DMD/Eli E. Machtei, DMD Pages: 1137–1143 PMID: 23057027 Abstract | Full Text PDF File | Order Article | E-mail Abstract 21 . Sinus Floor Elevation by Osteotome: Hand Mallet Versus Electric 11/1/12 3:22 PM The International Journal of Oral & Maxillofacial Implants: Volume 27, Issue 5 (September/October 2012) Page 4 sur 6 http://www.quintpub.com/journals/omi/journal_contents.php?iss_id=1070&journal_name=OMI&vol_year=2012&vol_num=27#.UJKFZnNWk0s Mallet. A Prospective Clinical Study Authors: Roberto Crespi, MD, MS/Paolo Capparè, MD/Enrico Gherlone, MD, DMD, PhD Pages: 1144–1150 PMID: 23057028 Abstract | Full Text PDF File | Order Article | E-mail Abstract 22 . A 3-Year Clinical Follow-up of Implants Placed in Two Different Biomaterials Used for Sinus Augmentation Authors: Christer Lindgren, DDS/Arne Mordenfeld, DDS/Carina B. Johansson, PhD/Mats Hallman, DDS, PhD Pages: 1151–1162 PMID: 23057029 Abstract | Full Text PDF File | Order Article | E-mail Abstract 23 . Long-Term Marginal Bone Loss in 217 Machined-Surface Implants Placed in 68 Patients with 5 to 9 Years of Follow-up: A Retrospective Study Authors: Javier Mir-Mari, DDS/Pedro Mir-Orfila, MD, DDS/Eduard Valmaseda-Castellón, DDS, PhD/Cosme GayEscoda, MD, DDS, PhD Pages: 1163–1169 PMID: 23057030 Abstract | Full Text PDF File | Order Article | E-mail Abstract 24 . Risk Factor Analysis Following Maxillary Sinus Augmentation: A Retrospective Multicenter Study Authors: Tiziano Testori, MD, DDS/Roberto L. Weinstein, MD, DDS/Silvio Taschieri, MD, DDS/Massimo Del Fabbro, BSc, PhD Pages: 1170–1176 PMID: 23057031 Abstract | Full Text PDF File | Order Article | E-mail Abstract 25 . Immediate Rehabilitation of Completely Edentulous Arches with a Four-Implant Prosthesis Concept in Difficult Conditions: An Open Cohort Study with a Mean Follow-up of 2 Years Authors: Paulo Malo, DDS, PhD/Miguel de Araújo Nobre, RDH/Armando Lopes, DDS Pages: 1177–1190 PMID: 23057032 Abstract | Full Text PDF File | Order Article | E-mail Abstract 26 . Evaluation of Patient Experience and Satisfaction with Immediately Loaded Metal–Acrylic Resin Implant-Supported Fixed Complete Prosthesis Authors: Kelly Kennedy, DDS, MS/Guillermo Chacon, DDS, MS/Edwin McGlumphy, DDS, MS/William Johnston, PhD/Burak Yilmaz, DDS, PhD/Patrick Kennedy, DDS Pages: 1191–1198 PMID: 23057033 Abstract | Full Text PDF File | Order Article | E-mail Abstract 27 . Immediate Loading of Maxillary Prostheses Using Flapless Surgery, Implant Placement in Predetermined Positions, and Prefabricated Provisional Restorations. Part 2: A Retrospective 10-Year Clinical Study Authors: Antonio Rocci, MD, DDS/Marta Rocci, DDS/Andrea Scoccia, DDS/Massimiliano Martignoni, DDS/Jan Gottlow, DDS, PhD/Lars Sennerby, DDS, PhD Pages: 1199–1204 PMID: 23057034 Abstract | Full Text PDF File | Order Article | E-mail Abstract 28 . Clinical Evaluation of Lateral and Osteotome Techniques for Sinus Floor Elevation in the Presence of an Antral Pseudocyst Authors: M. Isa Kara, DDS, PhD/Omer Kirmali, DDS, PhD/Sinan Ay, DDS, PhD Pages: 1205–1210 PMID: 23057035 Abstract | Full Text PDF File | Order Article | E-mail Abstract 29 . Effectiveness of Piezoelectric Surgery in Preparing the Lateral Window for Maxillary Sinus Augmentation in Patients with Sinus 11/1/12 3:22 PM The International Journal of Oral & Maxillofacial Implants: Volume 27, Issue 5 (September/October 2012) Page 5 sur 6 http://www.quintpub.com/journals/omi/journal_contents.php?iss_id=1070&journal_name=OMI&vol_year=2012&vol_num=27#.UJKFZnNWk0s Window for Maxillary Sinus Augmentation in Patients with Sinus Anatomical Variations: A Case Series Authors: Arthur Rodriguez Gonzalez Cortes, DDS, MS/Djalma Nogueira Cortes, DDS/Emiko Saito Arita, DDS, PhD Pages: 1211–1215 PMID: 23057036 Abstract | Full Text PDF File | Order Article |

Purpose: To evaluate the accuracy of a newly developed open-source system for three-dimensional dental implant planning and fully guided dental implant placement. Materials and Methods: Forty-eight implant positions were planned for eight partially edentulous anatomical patient equivalent models with an open-source implant planning system on the basis of cone beam computed tomography (CBCT) scans. The virtual software planning leads to an output of four different coordinates for each implant position; with these, surgical guides were manufactured using a coordinate-transfer apparatus. During the surgical simulation, drills and implants were fully guided as they were inserted by means of the harmonized components of the vendor's sleeve-in-sleeve system. After follow-up CBCT investigation and reference marker-based software registration, linear horizontal, vertical, and maximal 3D deviations, as well as angular deviations, between the virtual planning data and the surgical results were calculated. Results: The mean three-dimensional deviation values for the final implant positions were 671 mu m (95% confidence interval [Cl] 452 to 891 mu m) at the implant base and 808 mu m (95% Cl 646 to 971 mu m) at the implant tip. Mean vertical deviations were 273 mu m (95% Cl 200 to 345 mu m). Mean angular deviations of 1.9 degrees (95% Cl 1.4 to 2.4 degrees) were measured. Conclusions: The open-source implant planning system described in this study demonstrated a level of accuracy that is equal or superior to most descriptions of the literature on computer-aided implant dentistry, allows for predictable implant positioning, and has the potential to reduce postoperative impairment versus conventional implant insertion. INT J ORAL MAxiu_oFAc IMPLANTS 2012;27:128-137

OBJECTIVESTo evaluate the potential influence of different cone-beam computed tomography (CBCT) devices on the transfer accuracy of an open-source system for computer-aided implantology (CAI).MATERIAL AND METHODSA total of 108 implants in 18 partially edentulous patient-equivalent models were planned and fully guided implants were inserted using an open-source CAI system with three different CBCT devices. After follow-up CBCT and fiducial marker-matching procedure, linear horizontal, vertical, and maximal three-dimensional deviations, as well as angle deviations between the virtual planning data and the surgical results were calculated. Variance analysis was carried out to prove whether or not the observed differences between the CBCT devices were statistically significant.RESULTSThe observed mean three-dimensional deviation rates between virtually planned and achieved implant positions varied by around 400 μm (45%) at the implant's base and around 540 μm (50%) at the implant's tip in dependence to the applied CBCT device. Mean vertical deviations varied around 370 μm (76%) at the implant's base and 350 μm (69%) at the implant's tip, whereas axes deviations varied around 0.81° (40%) between the three investigated CBCT devices. Except for the axes deviations and the horizontal linear deviations at the implants base, observed differences reached significance level between the CBCT devices.CONCLUSIONSUntil now, the potential influence from different CBCT devices on the transfer accuracy of CAI systems has not yet been investigated. Data from the present study confirm for the first time the in vitro CBCT device dependency on the transfer accuracy of CAI systems reaching up to axes deviations of 0.6 angle degree and linear deviations around half a millimeter.