The top 100 highly cited articles on surgery-first orthognathic surgery between 2009 and 2022: a bibliometric and visualized analysis.

OBJECTIVES: To reveal research focuses on surgery-first orthognathic surgery by a bibliometric and visualized analysis of the top 100 highly cited articles. STUDY DESIGN: Published papers related to surgery-first orthognathic surgery were retrospectively retrieved from the Web of Science Core Collection from 2009 to 2022. The number of articles, journals, countries/regions, institutions, authors, and keywords were assessed and visualized using CiteSpace software. RESULTS: The top 100 cited articles included 89 research papers and 11 reviews. The average total citation was 21. The most influential article with 146 citations was published by Dr. Liou E.J.W. in 2011. The most common level of evidence was level IV (36 articles). The Journal of Oral and Maxillofacial Surgery had the largest number of papers and the highest total citation frequency. The most productive countries and institutions were Korea/China and Chang Gung Memorial Hospital, respectively. Chen Yu-ray and Choi Jong Woo published 13 and 11 articles with 434 and 299 total citations, respectively. Research interests shifted from skeletal class III malocclusion, accuracy, stability, and relapse to quality of life and virtual surgical planning. CONCLUSION: Our bibliometric analyses provide a comprehensive landscape of the influential topics and developmental trends in surgery-first orthognathic surgery and inspire future studies in this booming field.

Distribution of orthognathic surgery among the Swedish population: a retrospective register-based study.

OBJECTIVE: The aim of this study was to provide a nationally representative assessment of orthognathic procedures performed in hospitalised patients in Sweden and study regional differences in prevalence, demographic parameters and hospitalisation time. MATERIAL AND METHODS: From the Swedish National Board of Health and Welfare's register, all the patients undergoing orthognathic surgery between 2010 and 2014 were identified. Outcome variables were categorised into: (1) Surgical methods and regional distribution (2) Demographic variations (3) Hospitalisation time. RESULTS: The population-prevalence-rate of orthognathic procedures over the 5-year period was 6.3 (SD 0.4) per 100,000 persons, a regional difference in the prevalence was found. Most common were Le Fort I osteotomies (43.4%) and bilateral sagittal split osteotomies (41.6%), 39% of the patients had bimaxillary surgery. The majority of the surgery was performed in the age group 19-29 (68.8%). The mean hospital stay was 2.2 days (SD = 0.9, range 1.7-3.4). A significant regional difference (p ≤ 0.001) was found in hospitalisation time for single-jaw versus bimaxillary surgery. CONCLUSIONS: Regional differences in the distribution of orthognathic surgery and demographic variations were found in Sweden in 2010-2014. The underlying causes of variations are still unknown and request further investigation.

Practice patterns of virtual surgical planning: Survey of the reconstructive section of the American Head and Neck Society.

PURPOSE: Virtual surgical planning (VSP), with custom made implants and guides represents a recent major advance. Nonetheless, knowledge related to practice patterns is limited. The purpose of this study was to provide data from the AHNS Reconstruction Section related to practice patterns, perceived value of VSP, as well as elucidate specific situations which represent high value for the application of VSP. MATERIALS AND METHODS: A multi-center web-based survey consisting of 30 questions regarding practice patterns related to VSP practices delivered via email to 203 members of the AHNS Reconstructive Surgery Section at institutions across North America. RESULTS: There was a 34% response rate (70/203). A majority of the respondents (96%) used VSP in approximately 50% of their mandibular reconstruction cases, and in 42% of maxillary cases. 46% reported using patient specific implants >75% of cases. Respondents estimated that ~17% of patients received dental implant reconstruction. The majority of respondents (71.0%) did not know the cost of VSP at their institution. The remaining respondents indicated the average cost was $6680 per case. VSP was felt to be necessary as a teaching tool by 55.9%. CONCLUSIONS: Our results demonstrate that a majority of respondents frequently utilize VSP in their practice for head and neck reconstruction. Complex, multi-unit reconstructions were felt to offer the greatest value when utilizing VSP. Future work should focus on increasing the rates of dental implant reconstruction in this population, optimizing value of VSP with careful case selection, and understanding the educational value and costs of these platforms.

The Effect of Surgical Timing on 30-Day Outcomes in Cleft Palate Repair.

BACKGROUND: The optimal age for cleft palate repair continues to be debated, with little discussion of surgical risk related to operative timing. This study of 3088 cleft palate patients analyzed the impact of surgical timing on perioperative and 30-day postoperative outcomes. METHODS: Primary cleft palate repairs were identified in the National Surgical Quality Improvement Program database from 2012 to 2015. Data were combed for total postoperative complications, rates of readmission and reoperation, operating room time, and length of stay. Bivariate analyses were performed comparing 3-month periods from months 6 to 18, and months 0 to 5, 18 to 23, 24 to 29, and 30 to 59. RESULTS: Despite a higher proportion of isolated soft palate closure, children operated on before 6 months had a higher complication rate than children at other ages (7.1 percent versus 3.2 percent; OR, 2.4; p = 0.04), and higher rates of both readmission (3.6 percent versus 1.4 percent; OR, 3.6; p = 0.02) and reoperation (2.4 percent versus 0.5 percent; OR, 4.7; p = 0.04). There were no differences in short-term outcomes for any other age group younger than 5 years, and no differences in hospital length of stay among any age groups. CONCLUSIONS: The authors' findings suggest a relative contraindication to operation before 6 months. As there were no differences between any other age groups, long-term speech optimization should continue to be the primary consideration for operative planning. These findings improve the current rationale for palatoplasty timing, and can aid surgeons and parents in the surgical decision-making process. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, III.

Influence of Monobloc/Le Fort III Surgery on the Developing Posterior Maxillary Dentition and Its Resultant Effect on Orthognathic Surgery.

BACKGROUND: Timing of frontofacial surgery for the syndromic craniosynostosis as it relates to various surgical risks has not been adequately studied. The purpose of this study was to investigate posterior dental complications of midface advancement in patients with syndromic craniosynostosis undergoing surgery at different ages and the effects on subsequent orthognathic surgery. METHODS: A retrospective chart review of patients with syndromic craniosynostosis treated with midface advancement (monobloc or Le Fort III) from 1999 to 2018 was carried out. Patient demographics, records, and imaging studies were reviewed. A subanalysis of those patients who were also treated with orthognathic surgery from 2014 to 2018 with imaging studies available for analysis was also performed. RESULTS: Thirty-seven patients met the inclusion criteria. Sixty-four percent of the patients had radiographic evidence of maxillary molar dental abnormality. Older age at the time of surgery was significantly associated with a lower odds of sustaining dental injury (OR, 0.55; p = 0.034). The odds of damaging second or third maxillary molars was significantly higher with a younger age at the time of surgery (p = 0.021 and p = 0.034). The odds of sustaining dental injury increased moving posteriorly, showing the risk of abnormal pattern of M3 greater than M2 greater than M1. Advanced age at the time of surgery was significantly associated with decreased odds of dental injury (OR, 0.55; p = 0.034). CONCLUSIONS: Damage to the developing permanent maxillary molars may affect orthodontic management, mastication, and potentially maxillary development. Delaying frontofacial surgery until development of the permanent maxillary dentition should be considered if other indications do not mandate earlier intervention.

Long-Term Orthognathic Considerations in the Pierre Robin Sequence Patient.

BACKGROUND: One of the arguments against early intervention for micrognathia in Pierre Robin sequence is the concept that the growth of the mandible will eventually "catch up." Long-term growth of the mandible and occlusal relationships of conservatively managed Pierre Robin sequence patients remain unknown. In this study, the authors evaluated the orthognathic surgery requirements for Pierre Robin sequence patients at skeletal maturity. METHODS: Orthognathic surgical requirements of conservatively managed Pierre Robin sequence and isolated cleft patients (aged ≥13 years) at two institutions were reviewed and analyzed using t test, chi-square test, and Fisher's exact test. Values of p < 0.05 were considered statistically significant. RESULTS: Of the Pierre Robin sequence patients (n = 64; mean age ± SD, 17.9 ± 2.9 years), 65.6 percent were syndromic (primarily Stickler and velocardiofacial syndrome), 96.9 percent had a cleft palate, and 39.1 percent required orthognathic surgery at skeletal maturity. Nonsyndromic and syndromic Pierre Robin sequence patients demonstrated no differences in occlusal relationships or mandibular surgery frequency. The majority of Pierre Robin sequence patients requiring mandibular advancement had a class II occlusion. Comparison of Pierre Robin sequence patients to isolated cleft palate patients (n = 17) revealed a comparable frequency of orthognathic surgery between the two; however, Pierre Robin sequence patients did require mandibular advancement surgery at a greater frequency than cleft palate patients (p = 0.006). CONCLUSIONS: The present study found that 39.1 percent of conservatively managed Pierre Robin sequence patients required orthognathic surgery at skeletal maturity, of which the vast majority required mandibular advancement for class II malocclusion. These data suggest that mandibular micrognathia in conservatively managed Pierre Robin sequence patients may not resolve over time and may require surgical intervention. CLINICAL QUESTION/LEVEL OF EVIDENCE: Risk, II.

Further construct validation of the CLEFT-Q: Ability to detect differences in outcome for four cleft-specific surgeries.

BACKGROUND: The CLEFT-Q is a patient-reported outcome measure developed for use in patients with cleft lip and/or palate. A significant indicator of the CLEFT-Q's validity relates to its ability to detect differences between the impact of specific aspects of clefting before and after surgery. This study compares relevant sub-scale scores of the CLEFT-Q for patients requiring four specific surgical treatments against those who either have had surgery or never needed surgery. METHODS: CLEFT-Q scores and clinical information regarding the past and future need for jaw surgery, lip revision, rhinoplasty, and speech surgery were obtained from the CLEFT-Q field-test data. Eight one-way analysis of variance (ANOVA) models were developed to compare mean scores of relevant CLEFT-Q scales between those who needed surgery, those who have had surgery, and those who never needed surgery. Only patients from high-income countries were included to minimize the impact of any economic confounders that could result in treatment variation. In the rhinoplasly and lip revision models, patients without a cleft lip were excluded. In the jaw surgery and speech surgery models, patients without a cleft palate or alveolus were excluded. RESULTS: The CLEFT-Q field test included 1938 participants from high-income countries. Participants who needed surgery scored significantly lower (worse) than those who have had surgery in each of the eight relevant CLEFT-Q scales (p < 0.001 in each ANOVA). CONCLUSION: The ability of the CLEFT-Q to detect differences between groups based on surgical status further supports its validity.

Difference in Degrees of Satisfaction with Orthognathic Surgery and Orthodontic Treatment between Skeletal Class III and Cleft Patients.

OBJECTIVE: The aim of this study was to compare the degrees of satisfaction with orthognathic surgery and orthodontic treatment between skeletal Class III and cleft patients. MATERIALS AND METHODS: The samples consisted of Class III group (N = 25) and Cleft group (N = 16). The Modified Orthognathic Quality of Life Questionnaires, which had 5 domains (oral function [OF], awareness of dentofacial deformity [ADD], social relationship [SR], facial esthetics [FE], and nose/lip esthetics [NLE]), were evaluated with 5 rates (0 [very satisfactory] to 4 [very unsatisfactory]) at initial visit (T1), just before surgery (T2), 3 to 6 months after surgery (T3), and at debonding or 1 year after surgery (T4). The scores at each stage, amount of change between stages, and effect size (ES) in the 5 domains were investigated. RESULTS: Compared to Class III group, Cleft group exhibited lower satisfaction scores of NLE domain during all stages (all P < 0.001) and of SR domain and total domains at T4 stage (P < 0.05, P < 0.01). Cleft group showed significant improvement of satisfaction scores in FE domain during T1-T2 (P < 0.01), in SR, FE, NLE, and total domains during T2-T3 (all P < 0.01), in OF, SR, and total domains during T3-T4 (P < 0.05, P < 0.01, P < 0.01), and in all domains during T1-T4 (ADD, P < 0.05; OF, SR, and NLE, P < 0.01; FE and total, P < 0.001). Cleft group exhibited large improvement of ES only at SR and FE domains during T2-T3 (-0.81 and -1.09, respectively). CONCLUSIONS: Owing to lower satisfaction of NLE domain at all stages in cleft patients, clinicians should recommend adjunctive cosmetic surgery for nose and lip after completion of treatment.

Estabilidad esquelética postoperatoria en la cirugía ortognática bimaxilar convencional vs. rotación del complejo maxilomandibular / Postoperative skeletal stability in conventional bimaxillary orthognathic surgery vs rotation of the maxillomandibular complex

Introducción: La estabilidad esquelética postoperatoria en cirugía ortognática ha sido objeto de evaluación durante el paso del tiempo. Diversos autores han reportado que se produce una disminución de la misma en diversos movimientos de los maxilares en ocasiones utilizados en casos de rotación del complejo maxilomandibular. El objetivo del presente trabajo fue comparar la estabilidad esquelética postoperatoria de la cirugía ortognática bimaxilar convencional vs. cirugía ortognática bimaxilar con rotación del complejo maxilomandibular en pacientes sometidos a cirugía ortognática en el Servicio de Cirugía Oral y Maxilofacial del Hospital Militar Central de Bogotá, entre enero de 2012 hasta julio de 2016. Materiales y métodos: Se trata de un estudio retrospectivo. Se llevó a cabo análisis cefalométrico para comparar la estabilidad esquelética entre los pacientes de cirugía ortognática bimaxilar convencional vs. los pacientes de cirugía ortognática bimaxilar con rotación del complejo maxilomandibular durante tres momentos: preoperatorio (T1), postoperatorio inmediato (T2), postoperatorio al menos de seis meses (T3). Resultados: Se obtuvo una cohorte de 45 pacientes sometidos a cirugía ortognática bimaxilar convencional o cirugía ortognática bimaxilar con rotación del complejo maxilomandibular. La mayoría de las medidas realizadas mostraron que no existe diferencia significativa de estabilidad a largo plazo en ambos grupos. Conclusiones: La cirugía ortognática con rotación del complejo maxilomandibular, tanto en sentido horario como antihorario, es un procedimiento estable cuando se utiliza fijación interna rígida, cuando se está en presencia de articulacion temporomandibular (ATM) sanas y cuando la rotación se lleva a cabo en un punto a través del cóndilo mandibular

Introduction: Postoperative skeletal stability in orthognathic surgery has been evaluated over time, several authors have reported a decrease of it in movements of the jaws occasionally used in cases of alteration of the maxillo-mandibular complex. The aim of the present study was to compare the postoperative skeletal stability of conventional bimaxillary orthognathic surgery versus bimaxillary orthognathic surgery with rotation of the maxillo-mandibular complex in patients undergoing orthognathic surgery at the Oral and Maxillofacial Surgery Service of the Central Military Hospital of Bogotá between January 2012 until July 2016. Materials and methods: A retrospective study was conducted. We performed a cephalometric analysis to compare the skeletal stability between patients with conventional bimaxillary orthognathic surgery versus bimaxillary orthognathic surgery patients with maxillo-mandibular alteration during 3 moments: before surgery (T1), right after the surgery (T2), at least 6 months after surgery (T3). Results: A cohort of 45 patients undergoing conventional bimaxillary orthognathic surgery or bimaxilar orthognathic surgery with rotation of the maxillo-mandibular complex was obtained. Most of the measurements showed that there is no significant difference in long-term stability in both groups. Conclusions: Orthognathic surgery with rotation of the maxillo-mandibular complex both clockwise and counter-clockwise is a stable procedure when rigid internal fixation is used, when the temporomandibular joints (TMJs) are healthy and stable and when rotation is performed at a point through the mandibular condyle

Outcome of Patients with Complete Unilateral Cleft Lip and Palate: 20-Year Follow-Up of a Treatment Protocol.

BACKGROUND: The treatment plan for cleft lip and palate varies among centers and requires long-term evaluation of its final outcome. METHODS: A consecutive series of patients born from 1994 to 1996 were reviewed. Inclusion criteria were complete unilateral cleft lip and palate, undergoing all treatment procedures performed by the team, and continuous follow-ups until 20 years of age. Exclusion criteria were incomplete data, having microform cleft lip on the contralateral side, presence of the Simonart band, and other abnormalities. RESULTS: A total of 72 patients were included. Average age at final evaluation was 21.3 years; 83.3 percent of patients underwent one-stage rotation-advancement lip repair and 16.7 percent underwent two-stage repair with an initial adhesion cheiloplasty. All patients underwent palate repair using the two-flap method at an average age of 12.3 months. Velopharyngeal insufficiency occurred and required surgical interventions in 19.4 percent during the preschool age and in 16.7 percent at the time of alveolar bone grafting; 56.9 percent of patients underwent secondary lip/nose revision during the growing age. Regular orthodontic treatment was administered to 34.7 percent of patients between 12 and 16 years of age. Orthodontic treatment and orthognathic surgery were applied in 37.5 percent of the patients after maturity. The average number of surgical procedures to complete the treatment was 4.8 per patient. CONCLUSIONS: This treatment protocol provided generally acceptable final outcome after the 20-year follow-up. Some results were less ideal and have resulted in modifications of the planning and methods in the protocol. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, IV.

Rural and urban differences in orthognathic surgical patients in the north east of Scotland.

We have previously identified differences in the presentation and treatment of cancer between patients who live in rural compared with urban areas, but have not yet seen differences in those treated by orthognathic surgery. We hypothesised that patients from areas further away from the hospital face higher costs to attend and may not present with minor problems as often as those who live nearby. We therefore retrospectively reviewed all those (n=216) who had presented for orthognathic surgery over a six-year period (May 2011 to May 2017). The severity of malocclusion and facial asymmetry was established by combining measurements of intraoperative movements. Rurality was measured as the distance from home to the hospital at the time of operation. Those with smaller intraoperative movements (less than 7mm combined movement) lived significantly closer to the hospital as the crow flies (mean difference 15.13 miles, 95% CI 0.20 to 30.48, p=0.05) and could travel there more quickly (mean difference 65minutes 95% CI 9.8 to 121.7, p=0.02) than those with larger movements. Our results suggest that patients with small malocclusions and slight facial asymmetry who live further away from the hospital, may be less likely to present for operation than those who live closer. We explain why socioeconomic class is unlikely to confound our results, and suggest potential ways to minimise the effect observed.

Computer-Aided Surgical Simulation for Yaw Control of the Mandibular Condyle and Its Actual Application to Orthognathic Surgery: A One-Year Follow-Up Study.

Background: Favourable occlusal interdigitation and an optimized position of the mandibular condyle after surgery are essential for obtaining favourable results. The position of the condyle is determined during the operation. However, it is difficult to maintain the condyle's original position post-surgery despite the efforts of the surgeons. Indeed, a degree of rotation of the condyle is unavoidable, since it is difficult to verify whether the condyle is positioned correctly during surgery. Purpose: To maximize contact between the bone segments, the condyle was rotated around the vertical axis using surgical simulations. We examined changes to the condyle-fossa relationship after comparing virtual surgery to actual surgery. Methods: From 2015 to 2017, 20 patients were diagnosed with skeletal malocclusion and participated in computer-aided surgical simulation before undergoing orthognathic surgery. In the simulation, the mandibular condyles were rotated around the vertical axis, and the proximal segments were fixed to the distal segments using a customized miniplate and positioning device during actual surgery. This study investigated the relationship between the condyle and fossa using cone-beam computed tomography for several different time periods (preoperative (T0), virtual surgery (Tv), postoperative three days (T1) and one year (T2)). Results: The coronal and sagittal view exhibited significant differences in the mean values between T1and T0, Tv, and T2 for all joint spaces. As a result of the distance, the mean value of T2 in both the superior joint space (JS) and the lateral JS was significantly higher than that of Tv. In contrast, the mean value of Tv in the medial JS was significantly higher than that of T2. Moreover, the mean value of T2 on the axial plane was significantly larger than the values of Tv and T1. The mean value of T0 was also significantly larger than those of Tv and T1, and the mean value of Tv was larger than that of T1. Although the condyle was rotated, it exhibited a tendency to return to its preoperative position. There was no statistically significant difference in functional evaluation between T0 and T2. Conclusion: Our method of using yaw control for the condyle during virtual surgery and transferring this technique to the actual surgery can improve the conventional surgical technique by positioning the proximal segment in a pre-planned position, thus achieving optimal results.

[Dental complications during orthodontic preparation and orthognathic surgery]. / Complications dentaires de la préparation orthodontique et de la chirurgie orthognathique.

INTRODUCTION: Orthodontic-surgical treatment can present risks to the dental organ and the periodontium. Despite the low incidence of such cases, these complications can compromise a treatment plan. Practitioners should be aware of these potential complications, take them into account during treatment in order to reduce their negative impact and, if necessary, manage them by orthodontic-surgical collaboration. MATERIALS AND METHODS: In this article, the authors present several potential complications that can occur during treatment. CONCLUSION: The information given to the patient about the risks inherent in the implementation of an orthodontic-surgical protocol must necessarily include the risks of lesion to the dental organ and the periodontium.

Mandibular asymmetries and associated factors in orthodontic and orthognathic surgery patients.

OBJECTIVES: To estimate the prevalence of mandibular asymmetries in orthodontic and orthognathic surgery patients and to investigate demographic and skeletal factors associated with this disharmony. MATERIALS AND METHODS: Cone-beam computed tomography images of 1178 individuals aged 19 through 60 years with complete dentitions were analyzed. Outcomes were classified as relative mandibular symmetry, moderate asymmetry, and severe asymmetry. Factors recorded included sex, age, side of mandibular deviation, sagittal jaw relationship, vertical skeletal pattern, angle of the cranial base, and maxillary asymmetry. Ordinal logistic regression was used to estimate simple and adjusted odds ratios (OR) for the individuals with moderate and severe mandibular asymmetry, as well as 95% confidence intervals. RESULTS: Prevalence values of 55.2%, 27.2%, and 17.6% were observed for relative mandibular symmetry, moderate asymmetry, and severe asymmetry, respectively. An independent association with the side of mandibular deviation and the presence of maxillary asymmetry was observed, both for subjects with moderate mandibular asymmetry (left side: OR = 1.50; 95% CI: 1.01-2.24 / maxillary asymmetry: OR = 2.07; 95% CI: 1.11-3.76) and for those with severe asymmetry (left side: OR = 2.09; 95% CI: 1.27-3.44 / maxillary asymmetry: OR = 4.93; 95% CI: 2.64-9.20). CONCLUSIONS: Moderate and severe mandibular asymmetries were present in 44.8% of the sample, being associated with the side of mandibular deviation and with maxillary asymmetry.

The Skoog Lip Repair for Unilateral Cleft Lip Deformity: The Uppsala Experience.

BACKGROUND: The Uppsala Craniofacial Center has been treating patients with unilateral cleft lip deformity using the lip repair technique described by Tord Skoog. The aim of this study was to determine complications after lip surgery and the incidence and indications for lip revisions in all patients born with unilateral cleft lip from 1960 to 2004. METHODS: All patients who were born from 1960 to 2004 with unilateral cleft lip, cleft lip and alveolus, or cleft lip and palate and underwent lip repair were studied retrospectively. The timing, indication, complications of the primary procedure, and type of secondary surgery were recorded. Kruskal-Wallis and Fisher's exact tests were used, with Bonferroni correction. RESULTS: The study included 443 patients. The total rate of early surgical complications was 6 percent (n = 26). Secondary surgery for short upper lip was performed in 3.8 percent (n = 17), 8.4 percent (n = 37) underwent reduction of excess vermillion, 8.6 percent (n = 38) underwent scar revision, 11 percent (n = 51) underwent revision for incongruent vermillion-cutaneous border, and 10 percent (n = 45) underwent revision for other indications. Altogether, 45 percent had no secondary revisions. CONCLUSION: In conclusion, the Skoog lip repair is associated with a low total revision rate, and a short-lip deformity is rare. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, IV.

Cleft-Palate Repair: Does Hospital Case-Volume Impact Outcomes or Cost?

BACKGROUND: How hospital case-volume affects operative outcomes and cost continues to grow in importance. The purpose of this study was to examine the relationship of case volume with operative outcomes and cost in cleft palate repair. METHODS: Subjects undergoing cleft palate repair between 2004 and 2015 were identified in the Pediatric Health Information System. Outcomes were compared between two groups: those undergoing treatment at a high-volume institution, and those undergoing treatment at a low-volume institution. Primary outcomes were as follows: any complication, prolonged length of stay, and increased total cost. RESULTS: Over 20,000 patients (n = 20,320) from 49 institutions met inclusion criteria. On univariate analysis, those subjects who underwent treatment at a high-volume institution had a lower rate of overall complications (3.4 percent versus 5.1 percent; p < 0.001), and lower rates of prolonged length of stay (4.5 percent versus 5.8 percent; p < 0.001) and increased total cost (48.6 percent versus 50.9 percent; p = 0.002). In multivariate regression analyses, subjects treated in high-volume centers were less likely to experience any complication (OR, 0.678; p < 0.001) and were less likely to have an extended length of stay (OR, 0.82; p = 0.005). Subjects undergoing palate repair at a high-volume institution were no less likely to incur increased total cost (OR, 1.01; p = 0.805). CONCLUSION: In institutions performing a high volume of cleft palate repairs, subjects had significantly decreased odds of experiencing a complication or prolonged length of stay. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, III.

A Review of Randomized Controlled Trials in Cleft and Craniofacial Surgery.

This study presents a systematic review of randomized controlled trials (RCTs) in cleft and craniofacial surgery. All studies reporting on RCTs in cleft and craniofacial surgery were identified on PubMed using the search terms "cleft," "velopharyngeal insufficiency," "velopharyngeal dysfunction," "nasoalveolar molding," "gingivoperiosteoplasty," "Pierre Robin sequence," "craniofacial," "craniosynostosis," "craniofacial microsomia," "hemifacial microsomia," "hypertelorism," "Le Fort," "monobloc," "distraction osteogenesis," "Treacher Collins," and "Goldenhar." Studies were excluded if they were not randomized, did not focus primarily on topics related to cleft or craniofacial surgery, included repeat publications of data, or were unavailable in English. Studies were evaluated on demographic and bibliometric data, study size, specific area of focus, and findings reported. Four hundred forty-seven unique studies were identified. One hundred eighty-three papers met inclusion criteria (115 cleft lip and palate, 65 craniofacial, and 3 spanning both disciplines). Sixty-six (36%) were dedicated to topics related to surgical techniques. There were no studies comparing current cleft lip or soft palate repair techniques and no studies on cleft rhinoplasty. The most frequently reported surgical topic was cleft palate. There were several studies on orthognathic techniques which compared distraction osteogenesis to traditional advancement. Most craniofacial operations, such as cranial vault remodeling and frontofacial advancement/distraction, were not represented. Several standard operations in cleft and craniofacial surgery are not supported by Level I evidence from randomized controlled trials. Our community should consider methods by which more RCTs can be performed, or redefine the acceptable standards of evidence to guide our clinical decisions.

Duration of orthognathic-surgical treatment.

OBJECTIVE: The objective of this study was to determine the duration of orthognathic-surgical treatment conducted with conventional pre- and post-surgical orthodontic treatment phases. MATERIAL AND METHODS: The study material was comprised of the files of 185 consecutive patients treated in Oral and Maxillofacial Unit, Tampere University Hospital, Finland, in 2007-2014. The files were reviewed and the following data was obtained: gender and age of patients, ICD-10 diagnosis, type of malocclusion, duration of pre- and post-surgical orthodontic treatment and type of operation. RESULTS: Total treatment duration (median) from placement of separating rings for banding until fixed orthodontic appliances were removed and retention period started was 31.1 months, of which pre-surgical orthodontics took 24.4 months and postsurgical 6.4 months. Treatment duration (median) was in BSSO was 32.1, LeFort 1 30.1 and bimaxillary osteotomy 29.7 months. Orthodontic extractions were performed in 35 patients (19%). If the orthodontic treatment included tooth extraction, the duration of pre-surgical treatment was on average 10 months longer, which is a statistically highly significant difference (p < .001, linear regression). CONCLUSIONS: Tooth extractions (excluding 3rd molars) included in pre-surgical orthodontic treatment prolong treatment time by an average of 8-9 months.

[Evaluation of healing time of osteochemonecrosis of the jaw after surgery: Single-center retrospective study and review of the literature]. / Évaluation des délais de guérison des ostéochimionécroses des maxillaires après traitement chirurgical : étude rétrospective monocentrique et revue de la littérature.

INTRODUCTION: Osteochemonecrosis of the jaw (ONJ) is a chronic ischemic bone exposure. It has an increasing incidence. ONJ is mainly related to bisphosphonate and denosumab therapies in oncologic settings. Healing is considered uncertain ad as occurring slowly. International recommendations suggest to treat ONJ symptomatically in a first attempt. A surgical procedure, potentially aggressive, should be carefully weight up in patients in poor condition and whose life expectancy is often limited. However, surgical treatment seems to allow for a high rate of clinical remission. Postoperative remission periods, when mentioned in the studies, are disparate. The aim of our study was to clarify the remission period of ONJ after surgical management. METHOD: A retrospective study was conducted on all patients operated for an ONJ at stage 2 and 3 in the Department for Oral and Maxillofacial Surgery - University Hospital of Besançon (France) from January 2006 to September 2015. Healing was defined as complete mucosal closure and asymptomatic site. Stage of the disease, the number and the type of surgery and the time between the last operation and the healing was noticed. These data were compared to an exhaustive review of the literature on PubMed with the following key-words: "osteonecrosis" AND "jaw" AND "surgery" AND "management". Only the articles giving the healing period were included. RESULTS: Regarding the single-center retrospective study, the files of 23 patients could be included. Fifteen percent of the patients benefited from several procedures under general anesthesia. Twenty percent had a stage 3 ONJ and 80 % had a stage 2 ONJ. Twenty-five interventions were performed on 23 sites in 20 patients. Immediate healing after surgery occurred in 35 % of the patients. At 6 months after surgery, 57 % of the treated areas were healed. Twenty percent of the patients had died. The healing rate did not improve further after 6 months postoperatively. Regarding the review of the literature, 7 articles could be included. The mean postoperative healing period was 60.7 % at 6 months, 71.1 % at 12 months and 69.5 % at 18 months. DISCUSSION: Our study shows that the postoperative healing rate of ONJ lies between 57 and 66.7 % at 6 months and that this rate was optimized in the order of 10 % to 12months and stable at 18months postoperatively. The ONJ of our series were partially or fully linked to other drugs than bisphosphonates in 70 % of the cases: 50 % were related to denosumab, alone or in combination and 35 % were related to an association with antiangiogenics, bevacizumab mainly.