Bone Grafting Procedures Research Articles

Clinical Evaluation of Surgical Orthodontic Procedure with Bone Grafts for Patients with Cleft Palate during Adolescence

Background: Cleft lip and palate is a congenital anomaly, presenting in a wide variety of forms and combinations. Successful cleft lip and cleft palate rehabilitation requires a multidisciplinary approach employing the skills of different specialists.
 Aims & Objectives: The aim of this paper was to present orthodontic preparation of patients prior to alveolar bone grafting & to review our findings in a group of patients treated by secondary and delayed bone-grafting procedures at our institution.
 Methodology: Thirty eight patients were examined for the type of cleft and the age at the time of examination. 10 patients were treated in our institution with presurgical orthodontics & operated by a delayed bone-grafting technique. Duration and type of expansion was noted at pre-operative, 2 months and 6 months. Crestal bone heights and the quality of the bone in the grafted areas was examined radiographically, along with presence of any fistulas.
 Results: All the patients demonstrated improved alar base and upper lip support, also better dental stability was seen in the region of cleft.
 Conclusion: All the patients included in this study appeared to benefit from the procedure with improved facial balance. In all ten patients the oronasal fistulas remained closed, hence was reported to be a success.

Effectiveness and Pitfalls of Intraoral Distraction in Wide Alveolar Clefts: An Experience

Statement of the problemRestoration of alveolar cleft defects is both essential and challenging for the craniofacial team. The technique of distraction is useful in large alveolar clefts, especially after the failure of conventional grafting procedures. The study aimed to analyze the effectiveness and problems of an intraoral tooth-borne distraction device. Materials and methodsSince 2015, 16 patients with nonsyndromic clefts were operated on. Because the defect was large, a trifocal distraction appliance was designed wherein the distractor appliance was completely tooth-borne and incorporated 2 hyrax screws. All distraction devices were individualized according to the patients’ situation. The appliance was cemented intraoperatively, and a latent period of 1 week was allowed. The distraction was performed twice daily at the rate of 0.5 mm/day. Methods of data analysisSingle-institution prospective study. ResultsAll patients were treated with distraction strictly following the natural curve of the dental arch. CBCT was taken prior to surgery and after 8 months of the last activation to visualize bone formation. Only 2 patients needed additional bone grafting procedure to fill the residual defect. In these patients, the required bone was small and was harvested intraorally. A failure of gingivoperioplasty (dehiscence) was observed in 1 patient. Outcomes dataAll patients were treated with distraction strictly following the natural curve of the dental arch. The mean width of the alveolar cleft was found between 11 and 17 mm. CBCT was taken after 8 months of the last activation to visualize bone formation. The continuity of bone could be seen in the majority of cases. The area of the residual defect was found to be between 28.24 and 39.24 mm. ConclusionThe intraoral distraction appliance was successful in the closure of a large alveolar cleft with the 2 transport segments docking successfully. Thus, a hyrax expansion screw used as a distractor could bring about controlled bony transport with the desired directional vectors. Its exclusive tooth-borne usage minimizes the invasiveness of the procedure, and the simplicity of the appliance eliminates the need for costly distractors, making such therapy feasible for a greater number of patients. The intraoral distraction appliance can be used successfully for the controlled closure of large alveolar clefts.

Free-vascularized bone grafts for scaphoid non-unions viable as outpatient procedure?

Objective: To determine if free vascularized bone grafting procedures are considered safe to perform for outpatient treatment in the setting of scaphoid non-union. Setting: Utilizing The American College of Surgeons (ACS) National Surgical Quality Improvement Program (NSQIP) scaphoid nonunion cases were isolated and investigated. Patients/Participants: A total of 50 patients with scaphoid fractures treated with vascularized bone graft were identified. Intervention: Bone graft with microvascular anastomosis for closed fracture of the scaphoid Main Outcome Measurements: Length of hospital stay, acute (30 day) complication rates Results: The average length of hospital stay was 1.2 days and 18 patients (36%) were discharged the same day of surgery. There were no complications reported within the 30-day post-operative period. Conclusion: The reported early morbidity and mortality rates of free vascularized bone grafting in the setting of scaphoid fractures have been reported to be minimal. These rare early complications include superficial surgical site infections and pin site irritation. In this analysis, there were no reported adverse outcomes. Given the low risks for acute complications, vascularized bone transfer surgery in the setting of scaphoid nonunion can be considered safe and potentially cost effective to perform on an outpatient basis. Level of Evidence: IV Keywords: Scaphoid fracture; scaphoid nonunion; free vascularized bone graft; ambulatory surgery; outpatient surgery; cost effectiveness (J Ortho Business 2021 Oct 1;1(2):5-8)

ANTERIOR MAXILLARY IMMEDIATE IMPLANT AFTER EXTRACTION WITH CLOSE LOADING TEMPORARY CROWN

Immediate implant placement after extraction is a dental implant treatment procedure reported in several case studies with satisfactory results for patients and less crestal bone loss around the implant. This case report describes the method of immediate implant placement after extraction. It directs temporary crown placement in a female patient with failed post-endodontic treatment restoration on the maxillary incisor. The procedure was performed under local anesthesia, preceded by tooth extraction and socket cleaning post-extraction, followed by the implant and bone grafting procedure, then finalized by provisionalization. The immediate implant procedure is a simple and time-saving technique. No second surgery is required, such as delayed implant procedure, but the operator's good analytical, diagnostic, and planning skills in its implementation.

Chitosan-Based Scaffold for Mineralized Tissues Regeneration.

Conventional bone grafting procedures used to treat bone defects have several limitations. An important aspect of bone tissue engineering is developing novel bone substitute biomaterials for bone grafts to repair orthopedic defects. Considerable attention has been given to chitosan, a natural biopolymer primarily extracted from crustacean shells, which offers desirable characteristics, such as being biocompatible, biodegradable, and osteoconductive. This review presents an overview of the chitosan-based biomaterials for bone tissue engineering (BTE). It covers the basic knowledge of chitosan in terms of biomaterials, the traditional and novel strategies of the chitosan scaffold fabrication process, and their advantages and disadvantages. Furthermore, this paper integrates the relevant contributions in giving a brief insight into the recent research development of chitosan-based scaffolds and their limitations in BTE. The last part of the review discusses the next-generation smart chitosan-based scaffold and current applications in regenerative dentistry and future directions in the field of mineralized tissue regeneration.

Anterior Shoulder Instability Part II—Latarjet, Remplissage, and Glenoid Bone-Grafting—An International Consensus Statement

The purpose of this study was to establish consensus statements via a modified Delphi process on the Latarjet procedure, remplissage, and glenoid-bone grafting for anterior shoulder instability. A consensus process on the treatment utilizing a modified Delphi technique was conducted, with 65 shoulder surgeons from 14 countries across 5 continents participating. Experts were assigned to one of 9 working groups defined by specific subtopics of interest within anterior shoulder instability. The technical approaches identified in the statements on the Latarjet procedure and glenoid bone-graft were that a subscapularis split approach should be utilized, and that it is unclear whether a capsular repair is routinely required. Furthermore, despite similar indications, glenoid bone-grafting may be preferred over the Latarjet in patients with bone-loss greater than can be treated with a coracoid graft, and in cases of surgeon preference, failed prior Latarjet or glenoid bone-grafting procedure, and epilepsy. In contrast, the primary indications for a remplissage procedure was either an off-track or engaging Hill-Sachs lesion without severe glenoid bone loss. Additionally, in contrast to the bone-block procedure, complications following remplissage are rare, and loss of shoulder external rotation can be minimized by performing the tenodesis via the safe-zone and not over medializing the fixation. Overall, 89% of statements reached unanimous or strong consensus. The statements that reached unanimous consensus were the prognostic factors that are important to consider in those undergoing a glenoid bone-grafting procedure including age, activity level, Hill-Sachs Lesion, extent of glenoid bone-loss, hyperlaxity, prior surgeries, and arthritic changes. Furthermore, there was unanimous agreement that it is unclear whether a capsular repair is routinely required with a glenoid bone graft, but it may be beneficial in some cases. There was no unanimous agreement on any aspect related to the Latarjet procedure or Remplissage. Level V, expert opinion.

Evaluation of Radiographic Outcomes after Core Decompression for Osteonecrosis of the Femoral Head: The Beijing University of Chinese Medicine X-ray Evaluation Method

Joint-preserving treatments for osteonecrosis of the femoral head (ONFH) are an area of significant interest in orthopaedics as they may restore function and provide durable benefit to patients who would otherwise require early total hip arthroplasty. Studies reporting the outcomes for these procedures generally rely on a combination of radiographic and clinical outcomes. However, there is not currently a standardized radiographic scoring system that allows for objective reporting of radiographic outcomes following these procedures. This article introduces a novel scoring system (Beijing University of Chinese Medicine X-ray evaluation, BUCMXE) based on Anteroposterior (AP) hip radiographs to allow for objective evaluation and comparison of postoperative outcomes following joint-preserving treatments for ONFH. The proposed scoring system utilizes AP radiographs of the hip and consists of a total score (0-10) derived from the sum of subscores in 3 domains: femoral head morphology, osteonecrotic lesion, and degree of osteoarthritis. Each radiographic parameter is scored from 0 (normal) to 3 or 4 (advanced disease). The scoring model was retrospectively applied to a cohort of patients who had undergone core decompression and cancellous bone grafting procedures by the principal investigator. The BUCMXE provided a clear and reproducible means of quantifying and communicating radiographic changes over the course of follow-up in our study cohort. Statistical analysis demonstrated that the BUCMXE was sensitive to detect the radiographic changes associated with the index procedure. The median total score was reduced from 3 preoperatively to 2 at the initial (3-month) follow-up for this cohort. This change was attributable to the obvious improvement of osteonecrotic lesion in patients who had more advanced disease at the time of their procedure. The BUCMXE system allowed for objective quantification of radiographic changes following joint-preserving hip surgery in our cohort. Statistical analysis of BUCMXE scores demonstrated that the scoring system was sensitive to detect subtle radiographic changes associated with disease progression in the follow-up period. Therapeutic Level III.

Postoperative Morbidity and Complications in Elderly Patients after Harvesting of Iliac Crest Bone Grafts.

Background and objectives: In oral and maxillofacial operations, the iliac crest is a commonly used donor site from which to harvest bone for augmentation prior to dental implantation or for reconstruction of jaw defects caused by trauma or pathological lesions. In an aging society, the proportion of elderly patients undergoing iliac crest bone grafting for oral augmentation is growing. Although postoperative morbidity is usually moderate to low, the age and health of the patient should be considered as risk factors for complications and delayed mobilization after the operation. The aim of this retrospective study was to evaluate the postoperative morbidity and complications in elderly patients after the harvesting of iliac crest bone grafts for oral surgery. Material and Methods: Data were collected from a total of 486 patients (aged 7–85) who had a surgical procedure that included the harvesting of iliac crest bone grafts for intraoral transplantation. All patients were operated on between 2005 and 2021 in the Department for Oral and Maxillofacial Surgery of the University Hospital in Aachen, Germany. As parameters for postoperative morbidity and complications, gait disturbances, hypesthesia of cutaneous nerves, incision hernias, iliac crest fractures, delayed wound healing, and unfavorable scar formation at the donor site were all evaluated. Results: The study was performed with 485 patients due to the exclusion of one patient as the only one from whom grafts were taken from both sides. When younger and older patients were compared, neither gait disturbances (p = 0.420), nor hernias (p = 0.239), nor fractures (p = 0.239), nor hypesthesia (p = 0.297), nor wound healing delay (p = 0.294), nor scar problems (p = 0.586) were significantly different. However, the volume of the graft was significantly correlated with the duration of the hospital stay (ρ = 0.30; p < 0.01) but not with gait disturbances (ρ = 0.60; p = 0.597). Additionally, when controlling for age (p = 0.841), sex (p = 0.031), ASA class (p = 0.699), preexisting orthopedic handicaps (p = 0.9828), and the volume of the bone graft (p = 0.770), only male sex was associated with the likelihood of suffering gait disturbances (p = 0.031). Conclusions: In conclusion, harvesting bone grafts from the anterior iliac crest for intraoral augmentation is a safe procedure for both young and elderly patients. Although there is some postoperative morbidity, such as gait disturbances, hypesthesia, scar formation, or delayed wound healing at the donor site, rates for these minor complications are low and mostly of short duration. Major complications, such as fractures or incision hernias, are very rare. However, in our study, the volume of the bone graft was associated with a longer stay in hospital, and this should be considered in the planning of iliac crest bone graft procedures.

CLINICAL EFFICACY COMPARATIVE EVALUATION OF THE TREATMENT METHODS OF COMBINED DEFECTS AND DEFORMITIES OF THE ZIGOMA AND ORBIT

Introduction. Zigoma and orbital defects still become an actual problem of maxilla-facial surgery due to limited possibilities to precise restoration of their complex anatomy. Functional unity of zigoma and orbit in aspects of eyeball support and protection increases requirements to reconstructive precision. The total and subtotal defects are the most difficult for reconstruction when traditional methods of reconstruction demonstrate unconvincing efficiency. Complex anatomy of zigoma and orbit, as combination of convexities, depressions limited an application of free or vascularised bone transplants for precise 3D restoration of the face. Facing this, new possibilities of reconstructed were developed, based on CAD/CAM technologies. Application of patient specific implants (PSI), designed according personal anatomy of the patient and manufactured by additive technologies, open new modalities to reconstruction in orthognatic surgery, cranioplasty and others, demonstrated promising results. So, these achievements and experience possible could be implemented for zigoma reconstruction. The aim of the study was to evaluate and compare clinical efficacy of zigoma and orbital defect treatment with traditional methods of reconstruction.&#x0D; Materials and methods. To reach this purpose, fifty-one patients, who underwent reconstruction procedures regarding zigoma defects, were enrolled to retrospective study. All of them were clinically examined before and after surgery. CT examination was performed before, 1 week and 1 year after surgery in all cases. The patients, included to the study, were divided on two groups – main and control, equal concerning age, sex and anatomical-topographic patterns of the defects. The main group consisted of 27 patients, who underwent zigoma reconstruction with PSI. The rest of the patients, treated with traditional approach (free or vascularised bone grafting, reconstructive plates or reconstruction with temporal muscle), were included to control group.&#x0D; Clinical efficacy was evaluated applying esthetical estimation of experts according to ranking scale. Additionally, frequency of complication and precision of reconstruction according to CT were analysed. Orbital volume differences were calculated for cases of orbital reconstruction.&#x0D; Results. Comparative analysis of esthetical results revealed higher quality of reconstruction in a main group. The patients did not require any further surgical procedures in 66,7% of cases, in contrast, in a control group additional interventions were indicated or performed in 85,3% of patients (p&lt;0,05). Mean rate of aesthetic estimation by experts were 3,15+1,2 in main group and 1,96+0,8 in control. Follow-up period was longer than 12 months for both main and control groups. Mean follow-up were 20,4 ±9,3 and 26,2 ± 13,5 months respectively. During follow-up any kind of complications were observed between the patients of the main group in 14,8% of cases as well in control – 54,2 % (p=0,01). The main complication between the patients of first group was exposure of the implants, which was noted only in 3 cases, and was caused mainly extension of soft tissues above the implant or compromised soft tissue covering due to incomplete vascularisation of the flaps. At the same time the most frequently observed complications of the main group were total or partial resorption of the grafts (two cases), implant exposure (n=7) and limitation of mouth opening. Additionally, deformity of the fixators with bone fragment displacement was noted in 25,0 % cases.&#x0D; Eyeball displacement was defined in 66,7% of all cases. Mean volume difference in main group was 1,5±0,7 см3, when between patients of control it was 2,3±1,2см3 (р=0,032). The frequency of diplopia was equal for both group.&#x0D; Conclusions. The main advantage of PSI application for zigoma reconstruction is the possibility of the precise 3D restoration of its complex anatomy, renewal of the correct position of the zigoma. Relatively to the clinical tasks, PSI could be used as fixator or endoprosthesis separately or with bone graft procedures. In some clinical situations separate application of PSI as endoprosthesis may be consider as effective alternative for free tissue transfer procedures.

Alveolar bone grafting and gingivoperiosteoplasty in bilateral cleft lip and palate.

Gingivoperiosteoplasty (GPP) and alveolar bone grafting (ABG) procedures have a vast history. There have been many publications regarding ABG and secondary ABG, with and without presurgical infant orthopedics (PSIO), in bilateral cleft lip and palate patients. There is little long-term data available describing results of both techniques. The interdisciplinary approach to primary and secondary surgical procedures has proven to be beneficial for patients with bilateral cleft lip and palate. In the neonates, naso-alveolar molding (NAM) has been found to optimize the aesthetic outcome as well as re-approximating the arches to facilitate GPP. During the mixed dentition stage, arch preparation/expansion before the secondary ABG procedure improves arch morphology, restores the functional interarch relationship, and facilitates surgery. This review aims to highlight the key points of both the procedures and why combining both procedures along with PSIO procedures such as NAM might be helpful for the patients in the long term.

Minimal treatment options with one-piece implants

The aim of this publication is to present case reports to show what is possible with pterygoid implants for the rehabilitation of edentulous space in the jaw (maxilla) while avoiding sinus lifts and bone grafting procedures. In addition, the added value of one-piece implants for screwed retention is elucidated.

Results of in situ fixation of Andersson lesion by posterior approach in 35 cases.

Due to the rarity of the Andersson lesion (AL), the literature is ambiguous regarding the type of surgical fixation, need for debridement and deformity correction. The purpose of this retrospective study is to evaluate the efficacy, feasibility and functional outcome of posterior fixation in AL. This study included 35 patients having thoracolumbar AL operated for in situ fixation and fusion with minimum of 24-month follow-up. VAS (Visual Analogue Score) back pain, ODI (Oswestry Disability Index), Frankel's grade were compared and analyzed. Union status was noted with complications. The mean age of 35 patients was 56.34(± 11.3)years with average follow-up of 51.49months. Two patients had AL at two levels. 27/37 AL were at discal level. Average estimated blood loss (EBL) was 276.43ml and duration of surgery was 130.43min. On an average, operated segments needed 7.77 screws. There were ten minor complications without long-term sequel. Neurological improvement was noted in 30 patients. Average preoperative VAS score improved from 8.69 to 3.14, ODI score improved from 68.76 to 18.77 at final follow-up which were significant (p < 0.05). There was significant improvement in Frankel's grading (Z = - 4.354, P = 0.00). Surgical management of AL by posterior approach and posterior stabilization can give satisfactory results without the need of extensive anterior reconstruction, bone grafting or deformity correction procedures without added morbidity and complications.

Evaluation of 3D computer-assisted patient’s specific scaffold seeded with autogenous stem cells and platelet-rich fibrin in alveolar cleft repair.

Purpose: Evaluation of the treatment outcome of using patient-specific implantable scaffolds seeded with autogenous bone marrow mononuclear cell layer containing stem cells and platelet-rich fibrin in the treatment of alveolar cleft defect. Materials and methods: 12 alveolar cleft defects were divided into 2 groups; group A, six alveolar defects were treated using 3D printed patient’s specific implantable PLLA scaffolds seeded with autogenous bone marrow mononuclear cell layer containing stem cells and platelet-rich fibrin. Group B, six alveolar defects were treated with standard anterior iliac crest cortico-cancellous alveolar bone grafting procedures. Clinical and radiographic assessments were done to compare between two groups. Results: The results Showed that after 6 months group A was radiographically significantly less dense than the autogenous grafting group and when compared to Bergland’s scale there was no significant difference in bone loss after 6 months. Conclusion: Although this technique may not be the best choice regarding the density of bone formation, however within the limitations of this study, the results showed that this technique may be a new solution for transformation of the persistent cases of chronic oronasal fistula patients who underwent multiple failed autogenous bone grafting from a state of chronic fistulation to normal alveolar bone augmentation candidates.

Development and physicochemical characterization of novel porous phosphate glass bone graft substitute and in vitro comparison with xenograft

The process of bone regeneration in bone grafting procedures is greatly influenced by the physicochemical properties of the bone graft substitute. In this study, porous phosphate glass (PPG) morsels were developed and their physicochemical properties such as degradation, crystallinity, organic content, surface topography, particle size and porosity were evaluated using various analytical methods. The in vitro cytotoxicity of the PPG morsels was assessed and the interaction of the PPG morsels with Dental Pulp Stem Cells (DPSCs) was studied by measuring cell proliferation and cell penetration depth. The cell-material interactions between PPG morsels and a commercially available xenograft (XG) were compared. The PPG morsels were observed to be amorphous, biocompatible and highly porous (porosity = 58.45%). From in vitro experiments, PPG morsels were observed to be non-cytotoxic and showed better cell proliferation. The internal surface of PPG was easily accessible to the cells compared to XG.

Magnetic Resonance Imaging for the Planning, Execution, and Follow-up of Implant-Based Oral Rehabilitation: Systematic Review.

To undertake a systematic literature review of magnetic resonance imaging (MRI) employed in the three phases of implant-based oral rehabilitation: planning, execution, and follow-up. MEDLINE (PubMed) and EMBASE bibliographic databases were searched up to January 2020 for studies assessing the use of MRI alone or in connection with CT and/or CBCT in the planning, execution, or follow-up of dental implant placement and/or bone grafting procedures in the maxilla or the mandible. Included studies were also assessed according to the diagnostic imaging efficacy scale presented by Fryback and Thornbury (F&T). The search strategy yielded 10 studies, which were included in the systematic review. Six studies focused on the implant planning phase, one on the immediate follow-up phase, and three on both planning and follow-up. No studies acquired signal from the bone. There was no consensus on the gold standard, MRI sequence, or field strength (T). One study reached F&T level 1, eight reached level 2, and one reached level 3. The possible transition from radiography to ionizing-radiation-free imaging through MRI is still a novelty in dentistry and has yet to establish itself as a viable imaging modality suitable for replacing CT and CBCT. More studies are needed on the accuracy of the diverse MRI possibilities when applied for implant planning, execution, and follow-up before this diagnostic method can be considered as a reality for the clinician.

Clinical and Radiographic Predictors of Nonunion in Open Tibial Shaft Fractures.

Open fracture is a risk factor for nonunion of diaphyseal tibia fractures. Compared with closed injuries, there is a relative lack of scientific knowledge regarding the healing of open tibia fractures. The objective of this study was to investigate which patient, injury, and surgeon-related factors predict nonunion in open tibial shaft fractures. A cohort of 98 patients with 104 extra-articular open tibial shaft fractures (OTA/AO 41A2-3, 42A-C, and 43A) were treated surgically between 2007 and 2018 at a single level 1 trauma center and were retrospectively reviewed. Patients underwent irrigation and debridement followed by definitive intramedullary nailing or plate fixation. Patient, injury, and perioperative prognostic factors were analyzed as predictors of nonunion based on anteroposterior and lateral radiographs. The nonunion rate was 27.9% (n=29). There were 12 occurrences of deep infection (11.5%). The median follow-up was 14 months. High-energy mechanism of injury (hazard ratio [HR], 5.76), Gustilo-Anderson class IIIA injury (HR, 3.66), postoperative cortical continuity of 0% to 25% (HR, 2.90), early postoperative complication (HR, 4.20), and deep infection (HR, 2.25) were significant predictors of nonunion on univariable analysis (P<.05). On multivariable assessment, only high-energy mechanism of injury, Gustilo-Anderson class IIIA injury, and early postoperative complication reached significance as predictors of nonunion. These data also indicate that lack of cortical continuity is a significant univariable radiographic predictor of nonunion. This is potentially modifiable, may guide surgeons in selecting patients for early bone grafting procedures, and should be assessed carefully in this high-risk population. [Orthopedics. 2021;44(3):142-147.].

Possible Roles of Vitamin D in Bone Grafting.

Bone grafting is one of the most commonly used options to treat large bone defects. Evidence has shown that vitamin D may affect osseointegration, a major component for successful bone grafting. In vitro studies have proved that implants coated with activated vitamin D stimulate bone production and reduce bone resorption around implants. Animal studies have noticed that oral administration of vitamin D may stimulate bone formation as well as strengthen and support the interaction between bone and implants. Vitamin D insufficiency may affect negatively the cortical peri-implant bone formation, suggesting a negative effect in graft incorporation. Few clinical studies have observed that vitamin D administration enhanced graft incorporation and bone formation, while severe vitamin D deficiency is associated with failed implant osseointegration. Even though there are encouraging results of vitamin D supplementation on graft incorporation in animal studies, the use of vitamin D as an adjuvant in bone grafting procedures cannot be fully supported at the moment. However, there is theoretical support in the use of vitamin D after surgery and the use of bone grafts to support the bone structure, relieve pain and increase graft absorption. Further experimental and clinical studies are required to support the administration of vitamin D and its analogues in such cases.

Maxillofacial morphology in post-pubertal patients with unilateral cleft lip and palate following early vs. late secondary alveolar bone grafting

The study aimed at comparing maxillofacial morphology and burden of surgical treatment in post-pubertal patients with unilateral cleft lip and palate (UCLP) following early vs. late secondary alveolar bone grafting (SABG).In this retrospective study maxillofacial morphology was assessed on lateral cephalograms of skeletally matured patients with UCLP operated on consecutively in one center by the same method of one-stage primary cleft repair followed by SABG. Cephalometric analysis comprised 8 angular and 7 linear measurements. Maxillary growth restriction was evaluated by measuring SNA angle and Co-A and PNS-A distances. Five linear regression models with SNA, SNB, ANB, Co-A, and MP/SN as dependent variables and age at primary cleft repair, age at SABG, age at taking cephalogram, surgeon, and total number of surgical interventions as independent variables were also created.135 patients were included in the study - 70 patients (47 males and 23 females) had early SABG (E-SABG group) and 65 patients (40 males and 25 females) had late SABG (L-SABG group). Mean age at bone grafting procedure was 2.7 years (range 1.5–5.9, SD 1.1) and 10.3 years (range 6.1–18.8, SD 3.2) in E-SABG and LSABG group respectively. The variables describing the degree of maxillary growth restriction – SNA, Co-A, and PNS-A – were comparable in both groups (p = 0.707, 0.116, and 0.932, respectively). Regression models demonstrated that independent variables were not associated with the values of SNA angle, SNB angle, ANB angle, MP/SN angle, and Co-A distance (p = 0.761, 0.088, 0.249, 0.380, and 0.363, respectively). The percentages of oronasal fistula repair, VPI repair, repeated SABG, upper lip correction, rhinoplasty, orthognathic surgery were 22.9, 7.1, 15.7, 24.3, 42.9, 2.9 in E-SABG group and 27.7, 7.7, 9.2, 36.9, 47.7, 3.1 in L-SABG group respectively. Mean number of all surgical interventions was 3.2 in E-SABG and 3.4 in L-SABG group, respectively (p = 0.271).Considering the comparable maxillofacial morphology and burden of surgical care in matured patients after early and late SABG, the choice of timing of bone grafting surgery could be left to the discretion of the surgeon.

An Extrudable Partially Demineralized Allogeneic Bone Paste Exhibits a Similar Bone Healing Capacity as the "Gold Standard" Bone Graft.

Autologous bone grafts (BGs) remain the reference grafting technique in various clinical contexts of bone grafting procedures despite their numerous peri- and post-operative limitations. The use of allogeneic bone is a viable option for overcoming these limitations, as it is reliable and it has been widely utilized in various forms for decades. However, the lack of versatility of conventional allogeneic BGs (e.g., blocks, powders) limits their potential for use with irregular or hard-to-reach bone defects. In this context, a ready- and easy-to-use partially demineralized allogeneic BG in a paste form has been developed, with the aim of facilitating such bone grafting procedures. The regenerative properties of this bone paste (BP) was assessed and compared to that of a syngeneic BG in a pre-clinical model of intramembranous bone healing in critical size defects in rat calvaria. The microcomputed tridimensional quantifications and the histological observations at 7 weeks after the implantation revealed that the in vivo bone regeneration of critical-size defects (CSDs) filled with the BP was similar to syngeneic bone grafts (BGs). Thus, this ready-to-use, injectable, and moldable partially demineralized allogeneic BP, displaying equivalent bone healing capacity than the “gold standard,” may be of particular clinical relevance in the context of oral and maxillofacial bone reconstructions.

A review of bone grafting techniques for glenoid reconstruction.

Traumatic anterior shoulder dislocations can cause bony defects of the anterior glenoid rim and are often associated with recurrent shoulder instability. For large glenoid defects of 20-30% without a mobile bony fragment, glenoid reconstruction with bone grafts is often recommended. This review describes two broad categories of glenoid reconstruction procedures found in literature: coracoid transfers involving the Bristow and Latarjet procedures, and free bone grafting techniques. An electronic search of MEDLINE and PubMed was conducted to find original articles that described glenoid reconstruction techniques or modifications to existing techniques. Coracoid transfers involve the Bristow and Latarjet procedures. Modifications to these procedures such as arthroscopic execution, method of graft attachment and orientation have been described. Free bone grafts have been obtained from the iliac crest, distal tibia, acromion, distal clavicle and femoral condyle. Both coracoid transfers and free bone grafting procedures are options for reconstructing large bony defects of the anterior glenoid rim and have had similar clinical outcomes. Free bone grafts may offer greater flexibility in graft shaping and choice of graft size depending on the bone stock chosen. Novel developments tend towards minimising invasiveness using arthroscopic approaches and examining alternative non-rigid graft fixation techniques.