10,128 results match your criteria American Journal Of Sports Medicine[Journal]


Local Administration of Metformin Improves Bone Microarchitecture and Biomechanical Properties During Ruptured Canine Achilles Tendon-Calcaneus Interface Healing.

Am J Sports Med 2022 May 27:3635465221098144. Epub 2022 May 27.

Department of Sport Medicine, Xiangya Hospital, Central South University, Changsha, China.

Background: Tendon-bone interface (TBI) healing is a clinical dilemma that is closely relevant to new bone formation and remodeling at the repair site. Previous studies showed that metformin is an osteogenic inducer for stem cells in vitro and capable of stimulating bone regeneration in vivo.

Hypothesis: Metformin would be effective for promoting TBI healing by enhancing new bone formation and remodeling. Read More

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Transosseous Meniscus Root Repair in Pediatric Patients and Association With Durable Midterm Outcomes and High Rates of Return to Sports.

Am J Sports Med 2022 May 26:3635465221096474. Epub 2022 May 26.

Children's Healthcare of Atlanta, Atlanta, Georgia, USA.

Background: Injuries to the meniscus root attachments result in extrusion of the meniscus, impaired distribution of hoop stresses, and progressive degenerative articular wear. As a result of these deleterious effects, there has been increasing emphasis on repairing meniscus root injuries to restore structure and function.

Purpose: To describe meniscus root tear patterns, associated injuries, and outcomes of transosseous meniscus root repair in a series of pediatric patients. Read More

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Ulnar Collateral Ligament Reconstruction Does Not Decrease Spin Rate or Performance in Major League Pitchers.

Am J Sports Med 2022 May 26:3635465221097421. Epub 2022 May 26.

Stanford Department of Orthopaedic Surgery, Stanford University School of Medicine, Redwood City, CA, USA.

Background: Ulnar collateral ligament reconstruction (UCLR) is commonly performed in Major League Baseball (MLB) pitchers, with variable reported effects on velocity and traditional rate statistics. Currently, no studies have evaluated spin rate in the context of return to play (RTP) after injury. Greater spin rate has become increasingly sought after in the baseball community, as it is believed to be a vital aspect of pitch effectiveness. Read More

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Nonanatomic All-Inside Arthroscopic Anterior Talofibular Ligament Repair With a High-Position Anchor versus Anatomic Repair: An Analysis Based on 3D CT.

Am J Sports Med 2022 May 25:3635465221097119. Epub 2022 May 25.

Department of Orthopedic Surgery, Wonkwang University Hospital, Iksan, South Korea.

Background: In patients with chronic ankle instability, it is important to repair the anterior talofibular ligament (ATFL) at the anatomic origin site. However, there are limited reports on the clinical outcomes according to anatomic ATFL repair.

Purpose: To compare the clinical outcomes after arthroscopic ATFL repair according to whether the anchor is fixed at an anatomic position. Read More

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Predictors of Achieving the Maximal Outcome Improvement Threshold for Willingness to Undergo Revision Hip Arthroscopy.

Am J Sports Med 2022 May 25:3635465221096872. Epub 2022 May 25.

American Hip Institute Research Foundation, Chicago, IL, USA.

Background: The maximal outcome improvement threshold for willingness to undergo revision hip arthroscopy (MOWT) has not been defined yet.

Purpose: To determine the percentage MOWT in patients who underwent revision hip arthroscopy and to identify predictors of achieving the MOWT.

Study Design: Case-control study; Level of evidence, 3. Read More

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Magnetic Resonance Imaging Assessment of Hamstring Graft Healing and Integration 1 and Minimum 2 Years after ACL Reconstruction.

Am J Sports Med 2022 May 25:3635465221096672. Epub 2022 May 25.

University of Sydney, Sydney, Australia.

Background: An increase has been seen in the number of studies of anterior cruciate ligament reconstruction (ACLR) that use magnetic resonance imaging (MRI) as an outcome measure and proxy for healing and integration of the reconstruction graft. Despite this, the MRI appearance of a steady-state graft and how long it takes to achieve such an appearance have not yet been established.

Purpose: To establish whether a hamstring tendon autograft for ACLR changes in appearance on MRI scans between 1 and 2 years and whether this change affects a patient's ability to return to sports. Read More

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Surgical Management of Jones Fractures in Athletes: Orthobiologic Augmentation: A Systematic Review and Meta-analysis of 718 Fractures.

Am J Sports Med 2022 May 25:3635465221094014. Epub 2022 May 25.

Department of Musculoskeletal Disorders, Faculty of Medicine and Surgery, University of Salerno, Italy.

Background: The use of orthobiologics is expanding. However, the use of orthobiologic augmentation in primary fracture fixation surgery remains limited. Primary fracture fixation of the fifth metatarsal (Jones) in athletes is one of the rare situations where primary orthobiologic augmentation has been advocated. Read More

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Rates of Return to Manual Labor After Arthroscopic Rotator Cuff Repair.

Am J Sports Med 2022 May 23:3635465221097102. Epub 2022 May 23.

Department of Orthopaedic Surgery, Carthage Area Hospital, Carthage, New York, USA.

Background: Rotator cuff tears represent a significant cause of shoulder pain and dysfunction in the United States. The development of these injuries is associated with older patient age and higher levels of physical activity; however, data regarding the rate of return to work after arthroscopic rotator cuff repair in patients older than 50 years of age who have physically strenuous jobs is inconclusive.

Purpose/hypothesis: The purpose of this study was to report short term outcomes and return to work rates after arthroscopic rotator cuff repair in a cohort of patients aged 50 to 60 years working in manual labor jobs. Read More

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Disagreement in Pass Rates Between Strength and Performance Tests in Patients Recovering From Anterior Cruciate Ligament Reconstruction.

Am J Sports Med 2022 May 23:3635465221097712. Epub 2022 May 23.

Department of Orthopaedics, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA.

Background: Performance on strength and functional tests is often used to guide postoperative rehabilitation progress and return to activity decisions after anterior cruciate ligament reconstruction (ACLR). Clinicians may have difficulty in determining which criteria to follow if there is disagreement in performance outcomes among the tests.

Purpose/hypothesis: The purpose of this study was to compare pass rates between strength tests and single-leg hop (SLHOP) tests among men and women and between patients with lower and higher preinjury activity levels recovering from ACLR. Read More

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Increased Joint Space Narrowing After Arthroscopic Partial Meniscectomy: Data From the Osteoarthritis Initiative.

Am J Sports Med 2022 May 23:3635465221096790. Epub 2022 May 23.

Department of Orthopaedic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.

Background: Arthroscopic partial meniscectomy (APM) is widely performed and remains an important therapeutic option for patients with a meniscal tear. However, it is debated whether or not APM accelerates the progression of osteoarthritis (OA) in the long term.

Purpose/hypothesis: The purpose was to compare the progression of OA measured by the change in tibiofemoral joint space width (JSW)-a quantitative measure of OA radiographic severity-across 3 groups with a midterm follow-up: (1) patients undergoing APM; (2) those with a meniscal tear treated nonoperatively; and (3) those without a tear. Read More

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Choice of Patient-Reported Outcome Measures for Midterm Assessment After Anterior Cruciate Ligament Reconstruction Surgery.

Am J Sports Med 2022 May 23:3635465221099459. Epub 2022 May 23.

OrthoSport Victoria, Epworth HealthCare, Melbourne, Australia.

Background: Patient-reported outcome measures (PROMs) have become increasingly popular for assessing subjective elements of a patient's condition. Two frequently used knee-related PROMs after anterior cruciate ligament reconstruction (ACLR) surgery are the International Knee Documentation Committee Subjective Knee Form (IKDC-SKF) and the Knee injury and Osteoarthritis Outcome Score (KOOS). However, completing the full versions of both measures represents a considerable responder burden. Read More

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Beach-Chair Versus Lateral Decubitus Positioning for Arthroscopic Posterior Shoulder Labral Repair: A Retrospective Comparison of Clinical and Patient-Reported Outcomes.

Am J Sports Med 2022 May 23:3635465221095243. Epub 2022 May 23.

Rothman Orthopaedic Institute, New York, New York, USA.

Background: Both beach-chair and lateral decubitus patient positioning are often utilized for shoulder arthroscopy, with each offering its unique advantages and disadvantages. The surgical position is often selected according to each surgeon's preference, with no clear superiority of one position over the other.

Purpose/hypothesis: The purpose was to compare clinical and patient-reported outcomes between patients who underwent arthroscopic posterior labral repair in the beach-chair versus the lateral decubitus position. Read More

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Muscle-Derived Beige Adipose Precursors Secrete Promyogenic Exosomes That Treat Rotator Cuff Muscle Degeneration in Mice and Are Identified in Humans by Single-Cell RNA Sequencing.

Am J Sports Med 2022 May 23:3635465221095568. Epub 2022 May 23.

Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, California, USA.

Background: Muscle atrophy, fibrosis, and fatty infiltration are common to a variety of sports-related and degenerative conditions and are thought to be irreversible. Fibroadipogenic progenitors (FAPs) are multipotent resident muscle stem cells with the capacity to differentiate into fibrogenic as well as white and beige adipose tissue (BAT). FAPs that have assumed a BAT differentiation state (FAP-BAT) have proven efficacious in treating muscle degeneration in numerous injury models. Read More

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Adolescent Baseball Pitchers With Ulnar Collateral Ligament Tears Exhibit a High Proportion of Partial Tears.

Am J Sports Med 2022 May 23:3635465221094326. Epub 2022 May 23.

Department of Orthopedics and Sports Medicine, University of Washington, Seattle, Washington, USA.

Background: Ulnar collateral ligament (UCL) tears in the throwing elbow are classified according to grade and location using magnetic resonance arthrography (MRA). However, the frequency of each tear type and the association to age, competition level, and radiographic findings in adolescent baseball pitchers are unknown.

Purposes: The primary purpose of this study was to use MRA to characterize the severity, location, and UCL tear type in adolescent pitchers. Read More

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Evaluating Pelvis Rotation Style at Foot Contact: A Propensity Scored Biomechanical Analysis in High School and Professional Pitchers.

Am J Sports Med 2022 May 23:3635465221094323. Epub 2022 May 23.

Sports Medicine Institute, Hospital for Special Surgery, New York, New York, USA.

Background: Early pelvis rotation has been associated with decreased throwing arm kinetics and conventionally was considered a component of proper pitching form in baseball throwers. However, previous assessments of pelvis rotation style have not accounted for confounders such as playing level, anthropometric characteristics, or ball velocity and have not evaluated sufficient sample sizes.

Purpose: To compare kinetic and kinematic parameters based on pelvis rotation style in high school and professional pitchers. Read More

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Atypical Lower Limb Mechanics During Weight Acceptance of Stair Descent at Different Time Frames After Anterior Cruciate Ligament Reconstruction.

Am J Sports Med 2022 May 23:3635465221095236. Epub 2022 May 23.

Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Umeå, Sweden.

Background: An anterior cruciate ligament (ACL) rupture may result in poor sensorimotor knee control and, consequentially, adapted movement strategies to help maintain knee stability. Whether patients display atypical lower limb mechanics during weight acceptance of stair descent at different time frames after ACL reconstruction (ACLR) is unknown.

Purpose: To compare the presence of atypical lower limb mechanics during the weight acceptance phase of stair descent among athletes at early, middle, and late time frames after unilateral ACLR. Read More

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The Control of Anteromedial Rotatory Instability Is Improved With Combined Flat sMCL and Anteromedial Reconstruction.

Am J Sports Med 2022 May 23:3635465221096464. Epub 2022 May 23.

Department of Trauma, Hand and Reconstructive Surgery, University of Muenster, Muenster, Germany.

Background: Both the superficial medial collateral ligament (sMCL) and the deep MCL (dMCL) contribute to the restraint of anteromedial (AM) rotatory instability (AMRI). Previous studies have not investigated how MCL reconstructions control AMRI.

Purpose/hypothesis: The purpose was to establish the optimal medial reconstruction for restoring normal knee kinematics in an sMCL- and dMCL-deficient knee. Read More

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A Biomechanical Comparison of the LaPrade Technique Versus a Novel Technique for Reconstruction of Medial-Sided Knee Injuries.

Am J Sports Med 2022 May 23:3635465221094000. Epub 2022 May 23.

Department of Orthopaedics & Rehabilitation, University of New Mexico, Albuquerque, New Mexico, USA.

Background: Medial-sided knee injuries can lead to symptomatic valgus laxity or anteromedial rotatory instability and may require surgery, particularly in the setting of cruciate tears and tibial-sided medial collateral ligament (MCL) avulsions. The LaPrade (LP) technique utilizes 2 free grafts to reconstruct the superficial MCL (sMCL) and the posterior oblique ligament (POL). An alternative MCL reconstruction devised by the senior author comprises an anatomic single-bundle reconstruction using a free graft to reconstruct the sMCL with advancement and imbrication of the posteromedial capsule/POL (MCL anatomic reconstruction with capsular imbrication [MARCI] technique). Read More

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A Propensity Score-Matched Comparison Between Knotless Layer-by-Layer and En Masse Suture Bridge Techniques for Delaminated Rotator Cuff Tears.

Am J Sports Med 2022 May 23:3635465221093809. Epub 2022 May 23.

Department of Orthopedic Surgery, Eunpyeong St Mary's Hospital, School of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.

Background: Because the articular layer is more prone to retraction than the bursal layer of the supraspinatus tendon, it is important to restore each layer anatomically while repairing delaminated rotator cuff tears (RCTs).

Purpose: To compare clinical outcomes and tendon integrity between knotless layer-by-layer and conventional en masse repair techniques for delaminated RCTs.

Study Design: Cohort study; Level of evidence, 3. Read More

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Outcomes for the Arthroscopic Treatment of Femoroacetabular Impingement Syndrome With Acetabular Retroversion: A 3D Computed Tomography Analysis.

Am J Sports Med 2022 May 23:3635465221097118. Epub 2022 May 23.

Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois, USA.

Background: Increased attention has been directed toward the acetabular morphology in the management of patients with femoroacetabular impingement syndrome (FAIS). Whether acetabular version influences patient-reported outcomes remains poorly understood.

Purpose: To use computed tomography (CT)-based 3-dimensional (3D) bone models to (1) quantify acetabular version in patients with FAIS, (2) compare acetabular version on 3D bone models with current plain radiographic parameters, and (3) explore the relationship between the magnitude of acetabular version and minimum 2-year clinical outcomes after hip arthroscopy. Read More

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Effect of Anterolateral Structure Augmentation on Graft Maturity After Anterior Cruciate Ligament Reconstruction: A Clinical and MRI Follow-up of 2 Years.

Am J Sports Med 2022 May 20:3635465221092768. Epub 2022 May 20.

Department of Sports Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.

Background: Anterolateral structure augmentation (ALSA) has been applied to prevent residual rotatory instability and lower clinical failure rates after anterior cruciate ligament (ACL) reconstruction (ACLR); however, the effect of combined ALSA on the maturity of ACL grafts remains unknown.

Purpose: To evaluate the graft maturity and patient-reported outcomes in patients who underwent double-bundle ACLR with or without ALSA.

Study Design: Cohort study; Level of evidence, 3. Read More

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Surgical Repair of Stener-like Injuries of the Medial Collateral Ligament of the Knee in Professional Athletes.

Am J Sports Med 2022 May 20:3635465221093807. Epub 2022 May 20.

Department of Orthopaedic Surgery, The Princess Grace Hospital, London, UK.

Background: A "Stener-like" lesion of the knee is defined as a distal avulsion of the superficial medial collateral ligament (sMCL) with interposition of the pes anserinus between the ligament and its tibial insertion-a displacement impeding anatomic healing. Because of the scarcity of these injuries, the literature is limited to case reports and small case series.

Purpose: To assess the effect of surgical repair of acute Stener-like lesions of the sMCL on the following outcomes: return to preinjury level of sporting function; time to return to preinjury level of sporting function; functional performance; injury recurrence; and any other complications. Read More

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Lower Extremity Injury Rates on Artificial Turf Versus Natural Grass Playing Surfaces: A Systematic Review.

Am J Sports Med 2022 May 20:3635465211069562. Epub 2022 May 20.

Department of Orthopaedic Surgery, MedStar Union Memorial Hospital, Baltimore, Maryland, USA.

Background: No study has provided a comprehensive systematic review of sports injuries on artificial turf versus natural grass.

Purpose: To comprehensively examine the risk of overall injuries and multiple types of lower extremity injuries across all sports, all levels of competition, and on both old-generation and new-generation artificial turf.

Study Design: Systematic review; Level of evidence, 3. Read More

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Prevalence and Incidence of Chondral and Meniscal Lesions in Patients Undergoing Primary and Subsequent Revision Anterior Cruciate Ligament Reconstruction: An Analysis of 213 Patients From the SANTI Group.

Am J Sports Med 2022 May 16:3635465221094624. Epub 2022 May 16.

Centre Orthopedique Santy, FIFA Medical Center of Excellence, Hôpital Privé Jean Mermoz, Groupe GDS-Ramsay, Lyon, France.

Background: Previous studies have shown a higher prevalence of meniscal and chondral lesions at the time of revision anterior cruciate ligament reconstruction (R-ACLR) compared with primary ACLR procedures. However, studies that follow the development of meniscal and chondral status through primary and subsequent R-ACLR are scarce.

Purpose: To compare the prevalence of meniscal and chondral injuries in patients undergoing primary ACLR and subsequent R-ACLR. Read More

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Superior Capsular Reconstruction Versus Lower Trapezius Transfer for Posterosuperior Irreparable Rotator Cuff Tears With High-Grade Fatty Infiltration in the Infraspinatus.

Am J Sports Med 2022 May 10:3635465221092137. Epub 2022 May 10.

Department of Orthopaedic Surgery, Yeosu Baek Hospital, Yeosu, Republic of Korea.

Background: Superior capsular reconstruction (SCR) and lower trapezius transfer (LTT) have recently been utilized to treat irreparable rotator cuff tears (IRCTs). There is still no clear guideline on which treatment method is a better fit for posterosuperior IRCTs with high-grade 4 fatty infiltration in the infraspinatus.

Purpose: To compare the clinical and radiological outcomes between arthroscopic-assisted SCR (aSCR) and arthroscopic-assisted LTT (aLTT) in patients with posterosuperior IRCTs with high-grade (Goutallier grade 4) fatty infiltration in the infraspinatus muscle. Read More

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Personalized Medicine Using Predictive Analytics: A Machine Learning-Based Prognostic Model for Patients Undergoing Hip Arthroscopy.

Am J Sports Med 2022 May 10:3635465221091847. Epub 2022 May 10.

American Hip Institute Research Foundation, Chicago, Illinois, USA.

Background: Personalized medicine models to predict outcomes of orthopaedic surgery are scarce. Many have required data that are only available postoperatively, mitigating their usefulness in preoperative decision making.

Purpose: To establish a method for predictive modeling to enable individualized prognostication and shared decision making based on preoperative patient factors using data from a prospective hip preservation registry. Read More

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H-loop Knotless Double-Row Repair Versus Knotted Suture Bridge for Rotator Cuff Tears: A Biomechanical and Histological Study in an Animal Model [Formula: see text].

Am J Sports Med 2022 May 10:3635465221090605. Epub 2022 May 10.

Department of Orthopedics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangdong, China.

Background: Knotted suture bridge repair (KSBR) has been widely proven to be an effective method for rotator cuff repairs. However, the occurrence of type 2 failure after suture bridge repair remains a frequent problem because of the stress concentration and disturbance of tendon perfusion in the medial row. The authors have developed the H-loop knotless double-row repair (HLDR) to counteract these problems. Read More

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Differences between Coracoclavicular, Acromioclavicular, or Combined reconstruction Techniques on the Kinematics of the Shoulder Girdle.

Am J Sports Med 2022 May 9:3635465221095231. Epub 2022 May 9.

Department of Orthopedic Surgery and Traumatology, Ghent University Hospital, Ghent, Belgium.

Background: Although the coracoclavicular (CC) ligaments are classically reconstructed after acromioclavicular (AC) joint injuries, biomechanical studies over the past decade have indicated the importance of an additional reconstruction of the AC ligaments. To date, no kinematic study has investigated the kinematic differences between these reconstruction strategies.

Purpose: To evaluate the restoration of shoulder motion after an AC injury using a CC ligament, an AC ligament, or a combined reconstruction technique. Read More

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Prediction of Bilaterality in Patients With 1 Posterosuperior Rotator Cuff Tear.

Am J Sports Med 2022 May 9:3635465221094816. Epub 2022 May 9.

Department of Orthopaedic Surgery, Gyeongsang National University School of Medicine and Gyeongsang National University Changwon Hospital, Changwon, Republic of Korea.

Background: In patients with a known unilateral posterosuperior rotator cuff tear (PSRCT), the ability to predict a contralateral PSRCT may assist in earlier diagnosis and improved patient outcomes.

Purpose: To determine factors associated with bilateral PSRCT and their most predictive combinations using a nonhospitalized general population.

Study Design: Cross-sectional study; Level of evidence, 3. Read More

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Correlation of Rehabilitation and Throwing Program Milestones With Outcomes After Ulnar Collateral Ligament Reconstruction: An Analysis of 717 Professional Baseball Pitchers.

Am J Sports Med 2022 May 9:3635465221093995. Epub 2022 May 9.

Department of Orthopedic Surgery and Sports Medicine, Mayo Clinic, Rochester, Minnesota, USA.

Background: There remains room for improvement in surgical outcomes after medial ulnar collateral ligament reconstruction (MUCLR) in professional pitchers. The role and influence of postoperative rehabilitation on the outcomes of MUCLR are unknown. There is a paucity of clinical data in the current literature comparing the success of various postsurgical rehabilitation protocols after MUCLR. Read More

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