Primary Suture Group Research Articles

Prevention of incisional hernia with prophylactic onlay and sublay mesh reinforcement vs. primary suture only in midline laparotomies (PRIMA): long-term outcomes of a multicentre, double-blind, randomised controlled trial

Incisional hernia occurs approximately in 40% of high-risk patients after midline laparotomy. Prophylactic mesh placement has shown promising results, but long-term outcomes are needed. The present study aimed to assess the long-term incisional hernia rates of the previously conducted PRIMA trial with radiological follow-up. In the PRIMA trial, patients with increased risk of incisional hernia formation (AAA or BMI ≥27kg/m2) were randomised in a 1:2:2 ratio to primary suture, onlay mesh or sublay mesh closure in three different countries in eleven institutions. Incisional hernia during follow-up was diagnosed by any of: CT, ultrasound and physical examination, or during surgery. Assessors and patients were blinded until 2-year follow-up. Time-to-event analysis according to intention-to-treat principle was performed with the Kaplan-Meier method and Cox proportional hazard models. Trial registration: NCT00761475 (ClinicalTrials.gov). Between 2009 and 2012, 480 patients were randomized: 107 primary suture, 188 onlay mesh and 185 sublay mesh. Five-year incisional hernia rates were 53.4% (95% CI: 40.4-64.8), 24.7% (95% CI: 12.7-38.8), 29.8% (95% CI: 17.9-42.6), respectively. Compared to primary suture, onlay mesh (HR: 0.390, 95% CI: 0.248-0.614, p<0.001) and sublay mesh (HR: 0.485, 95% CI: 0.309-0.761, p=0.002) were associated with a significantly lower risk of incisional hernia development. Prophylactic mesh placement remained effective in reducing incisional hernia occurrence after midline laparotomy in high-risk patients during long-term follow-up. Hernia rates in the primary suture group were higher than previously anticipated. B. Braun.

The Outcome and Safety in Laparoscopic Common Bile Duct Exploration with Primary Suture versus T-Tube Drainage: A Meta-Analysis.

Sometimes, after choledochotomy, the common bile duct is closed with T-tube drainage for several weeks to prevent postoperative complications such as biliary fistula and stricture. But there has been controversy over the advantages of primary suture versus T-tube drainage. The purpose of our meta-analysis in laparoscopic common bile duct exploration is to appraise the efficacy and safety of T-tube drainage and primary suture. The literatures were searched by Web of Science, PubMed, Cochrane Library, OVID, and EMBASE between the year January 1, 2001 and February 28, 2021. Meta-analysis was performed by Stata 12. Fourteen studies with 1,549 patients (827 vs. 722) were included in our study. The primary suture group had significant lesser operative time (P ≤ 0.001), postoperative hospital stay (P ≤ 0.001), hospital expenses (P ≤ 0.001), intraoperative bleeding (P=0.001), and postoperative complications (P=0.006) than the T-tube drainage group. In postoperative bleeding (P=0.289), bile leakage (P=0.326), and bile duct stricture (P=0.750), there was no statistical difference. In the primary suture group, using single-arm synthesis, the bile leakage rate and the bile duct stricture rate were 0.07 vs. 0.04 and 0.00 vs. 0.00 in interrupted suture and continuous suture groups. The bile duct stricture rate was same in both groups, and the bile leakage rate was lower in the interrupted suture group. But the difference was not significant. The primary suture group had several advantages, including lesser operative time, postoperative complications, intraoperative bleeding, postoperative hospital stay, and hospital expenses. In bile leakage and bile duct stricture, the difference between the two groups was not significant. In the primary suture group, interrupted suture and continuous suture groups had similar bile leakage rate and bile duct stricture rate.

DIFERENTES MÉTODOS CIRÚRGICOS EM ANASTOMOSE DO CÓLON: ESTUDO EXPERIMENTAL

ABSTRACT - BACKGROUND:Although many methods have been defined for colonic anastomosis, anastomotic leak still remains important for sepsis control and successful healing.AIM: The purpose of this study was to compare the effects of conventional suture, polyglactin 910 mesh, and omental flap coverage on healing and anastomotic leak in experimental colonic anastomosis in rats.METHOD: This study was conducted on 18 Wistar rats and the animals were divided into three groups as follows: Group 1: primary suture group; Group 2: primary suture plus polyglactin 910 mesh group; and Group 3: primary suture plus omental flap coverage group. Groups were compared in terms of anastomotic bursting pressure, inflammation, fibroblastic activity, neovascularization, and collagen amount.RESULTS: There was a statistically significant difference in anastomotic bursting pressure between Groups 1 and 2 and between Groups 1 and 3 (p=0.004, p<0.05). There was a significant difference in fibroblastic activity between Groups 1 and 3 (p=0.011, p<0.05) and between Groups 2 and 3 (p=0.030, p<0.05). There was a significant difference in neovascularization and collagen between Groups 1 and 2 and between Groups 1 and 3 (p<0.05).CONCLUSION: This experimental study found that polyglactin 910 mesh and omental flap coverage for colocolic anastomoses improved the physical strength and healing of the anastomosis compared to conventional hand-stitched anastomoses. The polyglactin may be a safe alternative to 910 mesh in cases where the omental flap coverage cannot be used in the colonic anastomosis.

Comparison of Primary Suture and T-Tube Drainage After Laparoscopic Common Bile Duct Exploration Combined with Intraoperative Choledochoscopy in the Treatment of Secondary Common Bile Duct Stones: A Single-Center Retrospective Analysis.

Objective: To compare the safety and feasibility of T-tube drainage and primary suture after laparoscopy combined with choledochoscopy in the treatment of secondary choledocholithiasis. Methods: The clinical data of patients who underwent laparoscopic choledochoscopy combined with choledochoscopic common bile duct exploration (LCBDE) for secondary choledocholithiasis from June 2015 to June 2020 were analyzed retrospectively. According to the different treatment method of common bile duct (CBD) incision, the patients were divided into a T-tube drainage group and a primary suture group. The preoperative clinical characteristics, results of preoperative liver function tests (LFTs), LFTs on the first day after the operation and the fourth day after the operation, operation time, intraoperative bleeding, postoperative complications, and times of postoperative hospital stay were compared between the two groups. Results: There was no significant difference in preoperative clinical data, preoperative LFTs, and postoperative complications between the two groups (P > .05). However, primary suture demonstrated significant advantages (P < .05) in terms of the operation time, intraoperative blood loss, postoperative hospital stay, and other related factors. Bilirubin levels on the first day after the operation and the fourth day after the operation between the two groups suggested that T-tube drainage reduces bilirubin in the short term, but that long-term bilirubin draining is similar between the two strategies. Univariate and multivariate analyses showed that choledochal diameter less than 8 mm was an independent risk factor for bile leakage. Conclusions: Laparoscopy combined with intraoperative choledochoscopic CBD exploration is superior to T-tube drainage in terms of the operation time, intraoperative blood loss, and postoperative hospital stay. The ability of reducing bilirubin by traditional T-tube drainage is indeed better than that of primary suture in the early stage after operation, but there is no difference in long-term outcome between the two groups. Choledochal diameter ≤8 mm was an independent risk factor for bile leakage. To summarize, LCBDEs primary suture for secondary choledocholithiasis is safe and feasible.

Prophylactic Mesh After Midline Laparotomy: Evidence is out There, but why do Surgeons Hesitate?

Incisional hernias have an impact on patients' quality of life and on health care finances. Because of high recurrence rates despite mesh repair, the prevention of incisional hernias with prophylactic mesh reinforcement is currently a topic of interest. But only 15% of surgeons are implementing it, mainly because of fear for mesh complications and disbelief in the benefits. The goal of this systematic review is to evaluate the effectiveness and safety of prophylactic mesh in adult patients after midline laparotomy. An extensive literature search was performed in PubMed, Embase and CENTRAL until 9/5/2020 for RCTs and cohort studies regarding mesh reinforcement versus primary suture closure of a midline laparotomy. The quality of the articles was analyzed using the Scottish Intercollegiate Guidelines Network checklists. Revman 5 was used to perform a meta-analysis. Twenty-three articles were found with a total of 1633 patients in the mesh reinforcement group and 1533 in the primary suture group. An odds ratio for incisional hernia incidence of 0.37 (95% CI = [0.30, 0.46], p < 0.01) with RCTs and of 0.15 (95% CI = [0.09,0.25], p < 0.01) in cohort studies was calculated. Seroma rate shows a significant odds ratio of 2.18 (95% CI = [1.45, 3.29], p < 0.01) in favor of primary suture. No increase was found regarding other complications. The evidence for the use of prophylactic mesh reinforcement is overwhelming with a significant reduction in incisional hernia rate, but implementation in daily clinical practice remains limited. Instead of putting patients at risk for incisional hernia formation and subsequent complications, surgeons should question their arguments why not to use mesh reinforcement, specifically in high-risk patients.

Management of abdominal wound dehiscence: update of the literature and meta-analysis.

Abdominal wound dehiscence (AWD) is associated with significant morbidity and mortality. We aimed to provide a contemporary overview of management strategies for AWD. PubMed, EMBASE, the Cochrane library and a clinical trials registry were searched from 2009 onwards using the key words "abdominal wound dehiscence", "fascial dehiscence" and "burst abdomen". Study outcomes included surgical site infection (SSI), recurrence, incisional hernia and 30-day mortality. Studies reported by the EHS clinical guidelines on AWD were included and compared with. OpenMetaAnalyst was used for meta-analysis to calculate statistical significance and odds ratios (OR). Nineteenstudies were includedreporting on a total of 632 patients: 16 retrospective studies, one early terminated randomized controlled trial, one review and the European Hernia Society guidelines. Nine studies reported use of synthetic mesh (n = 241), two of which used vacuum-assisted mesh-mediated fascial traction (VAWCM) (n = 19), six without VAWCM (n = 198) and one used synthetic mesh with both VAWCM (n = 6) and without VAWCM (n = 18); two used biological mesh (n = 19). Seven studies reported primary suture closure (n = 299). Three studies reported on an alternative method (n = 91). Follow-up ranged between 1 and 96months. Meta-analysis was performed to compare the primary suture group with the synthetic mesh group. Heterogeneity was low to moderate depending on outcome. The overall SSI rate in the primary suture group was 27.6% versus 27.9% in the synthetic mesh group, resulting in mesh explantation in five patients; OR 0.65 (95% CI 0.23-1.81). Incisional hernia rates were 11.1% in the synthetic mesh group (19/171) and 30.7% in the primary suture group (67/218); OR 4.01 (95% CI 1.70-9.46). Recurrence rate did not show a statistically significant difference at 2.7% in the synthetic mesh group (3/112), compared to 10.2% in the primary suture group (21/206); OR 1.81 (95% CI 0.18-17.80). Mortality rates varied between 11.2% and 16.7% for primary suture group versus synthetic mesh; OR 1.85 (95% CI 0.91-3.76). Included studies were of low to very low quality. The use of synthetic mesh results in a significantly lower rate of incisional hernia, whereas SSI rate was comparable to primary suture repair.

Clinical research of laparoscopic common bile duct exploration with primary suture and T tube drainage in the management of choledocholithiasis

Objective To investigate the short-term clinical efficacy of laparoscopic common bile duct exploration(LCBDE) with primary suture or T tube drainage in the management of choledocholithiasis. Methods The retrospective cohort study was conducted from January 2014 to December 2018 with the clinical data of patients with choledocholithiasis being analyzed. A total of 863 patients were enrolled in this study. There were 431 males and 432 females. The median age was 60 (range 11 to 94). These patients had received LCBDE with primary suture (n=287) and T tube drainage (n=576) in the Department of General Surgery, the First Affiliated Hospital of Nanjing Medical University. Observation indicators: (1)Preoperative blood biochemistry, including blood serum levels of total bilirubin, direct bilirubin, ALT, AST, GGT. (2) Intraoperative conditions, including operation time, blood loss, diameter of common bile duct, number of common bile duct stone.(3)Short-term postoperative conditions, including postoperative hospital stay, postoperative complications. Measurement data with non-normal distribution were described as M (P25, P75), and comparison between groups was done using Mann-Whitney U test. Comparison of count data between groups were analyzed using the chi-square test. Univariate analysis and subsequent multivariable logistic regression were used to investigated the factors affecting the selection of surgical methods. Results (1) Blood serum levels of total bilirubin and direct bilirubin in the T tube drainage group were 17.0(12.2, 36.0) μmol/L, 7.6(4.9, 19.0) μmol/L, which were significantly higher than those of the primary suture group[15.7(11.8, 29.7) μmol/L, 6.7(4.4, 16.5) μmol/L)](Z=-2.023, -2.468, P 0.05). (2)The operation time of the primary suture group was 85(70, 100) min, which was significantly shorter than that of the T tube drainage group[97(75, 120) min](Z=-5.532, P 0.05). 61.32%(176/287) and 67.36%(388/576) of patients in the primary suture group and T tube drainage group were found with multiple stones in the common bile duct, with no difference between the two groups (χ2=3.083, P>0.05). (3)The primary suture group showed shorter postoperative hospital stay compared with the T tube drainage group[4(3, 5) d vs 6(5, 6) d, Z=-12.057, P<0.05]. The primary suture group showed more patients with bile leakage (2.09%) compared with that of the T tube drainage group (0.35%). Multivariable logistic regression showed that the number of common bile duct stone, diameter of common bile duct, time period of surgery, surgery group were significant factors affecting the selection of surgical methods(OR=1.687, 2.423, 0.587, 4.632, 95%CI: 1.152-2.470, 1.519-3.865, 0.511-0.675, 3.698-5.802, P<0.05). Conclusions Although different surgeons showed different opinions with the method of primary suture, laparoscopic common duct exploration with primary suture is safe and reliable in the management of choledocholithiasis with shorter operation time and faster postoperative recovery. T tube drainage is not absolutely necessary in the management of choledocholithiasis. Patients with multiple common bile duct stone or large diameter of common bile duct are likely to receive T tube drainage. Key words: Laparoscopy; Choledocholithiasis; Primary suture; T tube drainage; Surgical method

WHAT IS THE BEST CHOICE OF TREATMENT FOR PILONIDAL SINUS DISEASE WITH PERIANAL OPENINGS?

Background & Aims: In this retrospective study, we investigated the value of the treatment methods for pilonidal sinus disease with perianal openings. Methods: Patients records that were operated for pilonidal sinus disease with perianal openings between February 2008 and July 2011 were evaluated. The procedures included were excision of the pilonidal sinus with isolated fistulectomy or excision of the pilonidal sinus with fistulotomy + curettage + intraflexion. All the epidemiologic data (gender, age, disease duration, number of abscess drainage, surgical procedure, healing time, recurrence) were evaluated through correlation of surgical notes and discharge letters. Results: The median healing time for the fistula tract excision and primary suture group was 9 days. The median healing time for the fistulotomy and intraflexion group was 30 days. No recurrences were noted in either group. Conclusion: Isolated fistulectomy is recommended for the treatment of pilonidal sinus disease with perianal openings.

Meta-Analysis of Primary Mesh Augmentation as Prophylactic Measure to Prevent Incisional Hernia

Background: Incisional hernia (IH) remains one of the most frequent postoperative complications after abdominal surgery. As a consequence, primary mesh augmentation (PMA), a technique to strengthen the abdominal wall, has been gaining popularity. This meta-analysis was conducted to evaluate the prophylactic effect of PMA on the incidence of IH compared to primary suture (PS). Methods: A meta-analysis was conducted according to the PRISMA guidelines. Randomized controlled trials (RCTs) comparing PMA and PS for closing the abdominal wall after surgery were included. Results: Out of 576 papers, 5 RCTs were selected comprising 346 patients. IH occurred significantly less in the PMA group (RR 0.25, 95% CI 0.12-0.52, I²0%; p < 0.001). No difference could be observed with regard to wound infection (RR 0.86, 95% CI 0.39-1.91, I² 0%; p = 0.71) or seroma (RR 1.22, 95% CI 0.64-2.33, I² 0%; p = 0.55). A trend was observed for chronic pain in favor of the PS group (RR 5.95, 95% CI 0.74-48.03, I²0%; p = 0.09). Conclusion: The use of PMA for abdominal wall closure is associated with significantly lower incidence of IH compared to PS.

Immunogenic alteration in laparoscopic common bile duct exploration

BackgroundThe immunologic benefits of laparoscopic common bile duct exploration (LCBDE) for choledocholithiasis are poorly understood. The aim of the present study was to investigate immunologic changes during LCBDE using primary suture or T-tube drainage. MethodsPatients with choledocholithiasis undergoing laparoscopic primary suture of the common bile duct after LCBDE (primary suture group) or laparoscopic LCBDE with choledochotomy plus T-tube drainage (T-tube group) at a single center between June 2008 and June 2011 were included in the present study. Blood samples were collected 24 h preoperatively, and 24 and 72 h postoperatively to assess interleukin 6 (IL-6) and tumor necrosis factor α (TNF-α) as inflammation markers. Immunosuppression was evaluated using C-reactive protein and leukocyte subpopulations. ResultsPatients were 60 ± 17 y old in the primary suture group (56 men and 76 women) and 54 ± 20 y old in the T-tube group (50 men and 58 women). In the primary suture group, three patients (2.3%) required open surgery and six (4.5%) developed postoperative bile leakage. In the T-tube group, two patients (1.9%) required open surgery and four (3.7%) had bile leakage. Operation time and hospital stay were shorter in the primary suture group (P < 0.05). Postoperative TNF-α and lymphocyte counts were lower, and C-reactive protein and IL-6 levels were higher in the T-tube group compared with the primary suture group (P < 0.05). No recurrences or bile duct strictures were noted during follow-up (median of 12 mo). ConclusionsLaparoscopic primary suture techniques appear to reduce immunologic suppression by minimizing surgical trauma in patients with choledocholithiasis.

Conservative surgical management of Boerhaave's syndrome: Experience of two tertiary referral centers

BackgroundSurgery is generally proposed for Boerhaave's syndrome, spontaneous rupture of the esophagus. But diagnosis can be difficult, delaying appropriate management. The purpose of the present study was to evaluate outcome of conservative surgery for primary or T-tube repair performed in two tertiary referral centers. MethodsFrom June 1985 to November 2010, among 53 patients presenting with Boerhaave's syndrome treated surgically, 39 underwent a conservative procedure. These patients were retrospectively divided into two groups by type of repair: primary suture (group 1, n = 25) or suture on a T-tube (group 2, n = 14). Patients in group 1 were further stratified into two subgroups depending on whether the primary suture was made with reinforcement (subgroup rS) or not (subgroup S). ResultsLength of stays in hospital and intensive care were shorter in patients in group 1 (p = 0.037), but after a shorter delay before therapeutic management (p = 0.003) compared with group 2. For the other variables studied, outcome was more favorable in group 1, but the differences were not significant. Comparing subgroups rS and S showed that the rate of persistent leakage was significantly lower after reinforced suture (p = 0.021). ConclusionsThese findings from the largest reported cohort of Boerhaave's syndrome patients undergoing conservative surgery showed that primary and T-tube repair provide at least equivalent results. Reinforced sutures appear to provide better outcomes by reducing postoperative leakage.

Median and ulnar nerve grafting in children

A case series of seven children and adolescents who underwent secondary nerve grafting of median or ulnar nerve is presented. The children were evaluated after a mean follow-up of 7 years, using the Disabilities of Arm Shoulder and Hand (DASH) questionnaire and the Rosen-Lundborg outcome scale. The mean DASH outcome was 14.6 and the mean Rosen-Lundborg score was 2.08. A similar study was conducted for comparison in an adult group, with a mean DASH score of 46.3 and Rosen-Lundborg score of 1.3, indicating superior treatment results in children. The treatment outcome after nerve grafting in children did not match, however, to those obtained in the primary suture group.

The experimental study on application of gastrobiliary duct drainage in primary suture after exploration of common bile duct

Objective To establish an animal model with installation of gastrobiliary duct drainage (GBDD) in the primary suture after exploration of common bile duct, to assess the safety and feasibility of GBDD. Methods Thirty dogs were randomly divided into three groups: control group (n=5), primary suture group (n= 10) and GBDD group (n= 15). Serum TBil levels, bile leakage,and complications were observed and compared. Results No increase in serum TBil level was observed in the control group. However, serum TBil levels were significantly increased in the primary suture group compared to the GBDD group (P＜0. 01). GBDD were all successfully withdrawn at mean (7. 0±1.7) days after the operation. No bile leakage was found in the GBDD group, which was significantly different compared to 5/10 bile leakage cases in primary suture group (P＜0. 05). There were 3/10 cases of bile peritonitis, infection of incisional wound and splitted in the primary suture group, while there were no such complications in the GBDD group (all P＞0.05). Conclusions GBDD is safe and feasible. It can shorten biliary drainage time and prevent occurrence of bile leakage.Therefore, it has unique value in clinical application. Key words: Gastrobiliary duct drainage; Primary suture; Exploration of common bile duct

Effects of primary suture and fibrin sealant on hemostasis and liver regeneration in an experimental liver injury

To investigate the effects of fibrin sealant on hemostasis and liver regeneration and intra-abdominal adhesions in an experimental liver injury. Thirty-six Wistar rats were randomly divided into primary suture group (n = 15), fibrin sealant group (n = 15) and control group (n = 6). A wedge resection was performed on the left lobe of the liver. In primary suture group, liver was sutured using polypropylene material, while fibrin glue was administrated on the liver surface in fibrin sealant group. More intra-abdominal adhesions were observed in the primary suture group compared to the fibrin sealant group on 3rd (2.50 +/- 0.5 vs 0.25 +/- 0.5, P = 0.015), 10th (2.75 +/- 0.5 vs 0.50 +/- 0.6, P = 0.06) and 20th (1.75 +/- 0.5 vs 0.70 +/- 0.5, P = 0.015) postoperative days. Histopathological scores were better in the fibrin sealant group in comparison with the primary suture group on 3rd (8.75 +/- 0.5 vs 6.75 +/- 0.5, P = 0.006), 10th (7.50 +/- 1.0 vs 5.5 +/- 0.6, P = 0.021) and 20th (6.40 +/- 1.7 vs 3.20 +/- 1.6, P = 0.025) postoperative days. Out data suggest that fibrin sealant is preferred over primary suture in appropriate cases including liver trauma since it causes less intra-abdominal adhesions while allowing shorter hemostasis time as assessed in experimental liver trauma.

Laparoscopic cholecystectomy accompanied by simultaneous umbilical hernia repair

Umbilical defects may cause technical problems for general surgeons in patients during laparoscopic cholecystectomy (LC) operations and may increase the incidence of incisional hernia. The objectives of this study were to determine the optimal repair method for umbilical hernias that already exist or are encountered incidentally and to present data regarding potential problems that may occur during LC. Medical records of patients who had received simultaneous umbilical hernia repair (UHR) with LC were investigated retrospectively. Cholelithiasis was accompanied by umbilical hernia in 64 (8.6%) out of 745 patients who underwent LC and UHR simultaneously in our hospital between 2000 and 2004. The Mann-Whitney U, Chi-square, One-Way Anova, Kaplan-Meier survival analysis, the log-rank test and t test were used for statistical analyses. LC was followed by UHR using primary suture (Group 1), Mayo repair (Group 2) and flat mesh-based repair (Group 3) in 32 (50%), 18 (28.1%) and 14 (21.9%) patients, respectively. Mean body mass indexes (BMI) of patients were 26.6 kg/m 2, 29.2 kg/m 2 and 39.9 kg/m 2 in Groups 1, 2 and 3, respectively. Recurrence rates were 9.4%, 5.6% and none (0%) in Groups 1, 2 and 3, respectively. Recurrence was observed in three (7.0%) out of 43(67.2%) patients with BMI > or = 30 kg/m 2 while umbilical hernia recurred in one (4.8%) out of 21 (32.8%) patients with BMI < 30 kg/m 2. Overall morbidity and mortality rates were 14.1% and 0%, respectively. The outcomes of the UHR with mesh after laparoscopic surgeries appear to be better for either obese or non-obese patients than primary suture techniques in recurrence rates.

膝関節重度複合靭帯損傷（前及び後十字靭帯同時損傷を含む）の治療経験

Simultaneous rupture of the anterior and posterior cruciate ligaments is a rare but serious condition. From 1978 to 1992, 13 patients were treated surgically for this disorder at our hospital. They were followed up for a mean of 4.8 years, (range: 11 months-15 years). We evaluated clinical symptoms according to the JOA score system. (1) The primary suture group of ACL (3 patients) had a mean of 59 points. (2) In the ACL reconstruction group, non-treatment PCL group (2 patients) had a mean of 71 points, the reconstruction PCL group (2 patients) averaged 59 points, and the primary PCL repair group (6 patients) had an average of 64.5 points. Objective evaluation showed that 12 patients were sufficiently restrained on the anterior drawer test, but 1 patients had posterior instability without functional instability.In conclusion, we think that it is best to treat the acute ACL tear by primary reconstruction. If possible, the acute PCL tear should also be treated by primary repair. When posterior instability is qreater than 15mm, PCL tears are recommended to be treated by reconstruction.