两种颌后入路治疗下颌骨髁突骨折方法的研究

目的:探讨两种颌后入路治疗下颌骨髁突颈骨折的治疗方法及效果。方法:64例成人下颌骨中低位髁突颈骨折患者,随机分为A、B两组,经颌后入路,分别采用腮腺前缘入路及横断腮腺入路,解剖复位髁突骨折行坚强内固定术。结果:64例患者均取得良好解剖复位,咬合关系恢复良好,无关节强直出现。A组2例出现面神经麻痹。B组2例出现涎瘘,4例出现面神经麻痹症状。结论:颌后入路可有效治疗髁突骨折,且腮腺前缘入路较横断腮腺入路减少了手术并发症的发生。     

Evaluation of facial nerve following open reduction and internal fixation of subcondylar fracture through retromandibular transparotid approach

The objective of this study was to evaluate any damage to the facial nerve after a retromandibular transparotid approach for open reduction and internal fixation (ORIF) of a subcondylar fracture. We studied 38 patients with 44 subcondylar fractures (3 bilateral and 38 unilateral) treated by ORIF through a retromandibular transparotid approach. All patients were followed up for 6 months. Postoperative function of the facial nerve was evaluated within 24 h of operation, and at 1, 3, and 12 weeks, and 6 months. Variables including type of fracture, degree of mouth opening, postoperative occlusion, lateral excursion of the mandible, and aesthetic outcome were also monitored. Nine of the 44 fractures resulted in transient facial nerve palsy (20%). Branches of the facial nerve that were involved were the buccal (n = 7), marginal mandibular (n = 2), and zygomatic (n = 1). In the group with lateral displacement, 2/15 showed signs of weakness, whereas when the fracture was medially displaced or dislocated 7/23 showed signs of weakness. Of the 9 sites affected, 7 had resolved within 3 months, and the remaining 2 resolved within 6 months. The mean (range) time to recovery of function was 12 weeks (3–6 months). There was no case of permanent nerve palsy. The retromandibular transparotid approach to ORIF does not permanently damage the branches of the facial nerve. Temporary palsy, though common, resolves in 3–6 months. Postoperative occlusion, mouth opening, and lateral excursion of the mandible were within the reference ranges. We had no infections, or fractured plates, or hypertrophic or keloid scars.     

穿腮腺手术径路治疗下颌骨髁突骨折的临床效果评价

目的评价穿腮腺手术径路治疗下颌骨髁突骨折的临床效果。 方法对31例（共36侧）下颌骨髁突骨折的患者,穿腮腺入路行下颌骨髁突骨折切开复位钛钉钛板坚固内固定术、髁突骨折碎片取出术并髁突成形术。术后观察面型、张口度、咬合关系、面神经损伤、有无唾液腺瘘及复查颌面部CT观察骨折段的复位情况等。 结果24例（共29侧）行下颌骨髁突骨折切开复位钛钉钛板坚固内固定术,7例（共7侧）髁突骨折碎片取出术并髁突成形术,术后随访6 ~ 18个月（平均11.3个月）;通过穿腮腺手术径路骨折断端复位准确、固定良好、咬合功能恢复正常、面部外形均满意;4例患者早期出现Ⅰ~Ⅱ度张口受限,经过张闭口训练后恢复正常;5例患者出现面神经暂时性麻痹,8周后均恢复正常;1例患者出现唾液腺瘘,经过加压包2周后扎后创口愈合;4例患者出现创伤性关节紊乱症,有关节弹响、疼痛等。 结论穿腮腺手术径路治疗下颌骨髁突骨折安全有效,手术并发症少,值得临床推广应用。     

Retromandibular approach to the mandibular condyle: a clinical and cadaveric study

This prospective study was carried out to assess the morbidity of the retromandibular approach in the management of condylar fractures. Twenty consecutive patients underwent open reduction and internal fixation of their condylar fractures using this technique. Branches of the facial nerve were encountered in six cases (30%). Temporary weakness of the facial nerve occurred in six patients (30%), but this resolved in all cases within 3 months and there were no cases of permanent nerve injury. Two patients had a temporary deficit of the great auricular nerve and one patient developed a sialocoele that resolved with aspiration. A cadaveric study using 30 facial halves (15 fresh cadavers) was also conducted. Branches of the facial nerve were encountered in 12 dissections (40%). The literature regarding facial nerve morbidity in relation to the management of condylar fractures is reviewed.     

A comparative evaluation of rhytidectomy versus retromandibular approach for Open Reduction and Internal Fixation (ORIF) of mandibular condylar fractures

Objective  This clinical study was carried out on thirty patients who underwent open reduction and internal fixation for condylar fractures via rhytidectomy/retromandibular approach were evaluated. Methods  Group I (rhytidectomy approach) were compared and evaluated clinically and radiologically with Group II (retromandibular approach) for the following parameters like surgical access, duration of surgery, anatomic reduction assessment with relevant radiographs, occlusal discrepancies, need for post operative IMF, facial nerve morbidity, other post operative complications and scarring. Results  There was a statistically significant difference between the two groups in the duration of surgery which was found to be significantly lesser for group II than group I. Access was better in group I. Scar was well camouflaged in patients of Group I when compared to group II. Conclusion  The rhytidectomy (Face-lift) incision which we have used in our study has all the advantages of the retromandibular approach with an added advantage of a less conspicuous scar and a wider exposure of the fracture site. The only disadvantage is the added time required for the closure which is not a concern as the aesthetic outcome of this technique is superior to the other approaches.     

The retromandibular transparotid approach: Our clinical experience

Introduction

Mandibular condylar fractures are very common. There is general agreement that an intracapsular fracture requires conservative treatment, but the treatment of extra-capsular fractures is controversial. Extraoral approaches have different advantages and disadvantages. The possibility of damage to the facial nerve is always present but, in our experience, always recovers in a short time.

Materials and methods

From June 2008 to June 2009, we admitted 25 patients with mandibular condylar fractures to our department. Nineteen patients received a retromandibular transparotid approach to identify and stabilize the condylar fracture site. None of them developed infection.

Surgical technique

A 2 cm incision extending in the retromandibular hollow is the first step. Initial dissection in a forward and upward in the direction of the SMAS layer is mandatory to gain good mobility of the soft tissue flaps. Blunt dissection through the parotid gland is performed between the marginal and buccal branches of the facial nerve. Periosteal elevation of all the lateral surface of the mandible provides good exposure of the bony surfaces and mobilization of the soft tissues.

Conclusions

We believe that this approach is a safe and time sparing alternative to the intraoral endoscopic approach     

Usefulness of the retromandibular transparotid approach for condylar neck and condylar base fractures

Condyle fractures represent 20% to 30% of all mandibular fractures and are thus among the most common facial fractures. The fracture pattern can vary greatly and may occur anywhere along the line from the sigmoid notch to the mandibular angle. The main problems are access, difficulty in repositioning the extremely slender fragments, and fixation of the condyle.Eighty-seven patients were diagnosed with condylar neck or condylar base fractures from January 2007 to December 2009 in the Department of Oral & Maxillofacial Surgery of Kyung Hee University Dental Hospital. In this study, we included 35 patients who underwent open surgery and a total of 28 patients who were treated using a retromandibular transparotid approach.Surgical treatment aims were anatomic repositioning and rigid fixation of the fragments, occlusal stability, rapidly return to function, maintenance of vertical ramus dimension, no airway compromise, and reduced long-term temporomandibular joint dysfunction. Considering the high rate of occurrence of condylar fracture and the importance of the condylar as a growth center of the mandible, extraoral approaches for the open reduction of condylar fractures are considered effective and can be used widely.Short access route, easy reduction, short operating time, and stable postoperative occlusion are the advantages of the retromandibular transparotid approach. Also, there was no permanent damage from facial nerve injury, salivary leakage, or preauricular hypoesthesia. Therefore, the retromandibular transparotid approach is considered a safe and effective method for patients with a condylar neck or condylar base fracture classified according to the Strasbourg Osteosynthesis Research Group's classification, who require surgical treatment with an extraoral approach.     

Transmasseteric anterior parotid approach for condylar fractures: experience of 129 cases

We have evaluated the transmasseteric anterior parotid (TMAP) approach in the treatment of 163 condylar fractures in 129 patients. Ninety-five patients presented with unilateral, and 34 with bilateral, fractures. The inclusion criteria were patient's choice for open reduction and internal fixation, displaced unilateral condylar fractures with occlusal derangement, and displaced bilateral condylar fractures with anterior open bite. Mean (SD) maximum interincisal opening after 3 months was 44(5)mm. There were no differences in lateral movements during the reviews 6 weeks and 3 months postoperatively. Protrusive movement at the end of 3 months was 7(2)mm. All patients achieved functional occlusion identical to the pretraumatic occlusion and good reduction of the condyles. No patient developed temporary or permanent facial palsy, sialocele, salivary fistula, or Frey syndrome. The mean (SD) operating time was 46(11)min. The TMAP approach avoids the complications of incision of the parotid gland, minimises the risk of facial nerve palsy, and offers excellent access to the fractured condyle.     

The retromandibular transparotid approach for reduction and rigid internal fixation using two locking miniplates in mandibular condylar neck fractures

We evaluated the safety, efficacy, and morbidity associated with the treatment of displaced mandibular condylar neck fractures using a retromandibular transparotid approach to reduce and rigidly fix using two 2.0-mm locking miniplates. Our surgical inclusion criteria were: patient selection of open reduction and fixation, displaced unilateral condylar fractures with derangement of occlusion, and bilateral condylar fractures with an anterior open bite. The study group consisted of 19 patients who underwent surgery for 19 mandibular condylar neck fractures; patients were analyzed prospectively, with more than 6 months of follow-up, and were evaluated in terms of functional results, scar formation, postoperative complications, and stability of fixation. The results showed that functional occlusion identical to the preoperative condition and correct anatomical reduction of the condylar segments in centric occlusion, followed by immediate functional recovery, was achieved in all patients. No patient suffered from any major or permanent complication postoperatively, although there were two cases (11%) of temporary facial nerve palsy, which resolved completely within 3 months. Surgical scars were barely visible. The retromandibular transparotid approach with open reduction and rigid internal fixation for displaced condylar neck fractures of the mandible is a feasible and safe, minimally invasive surgical technique that provides reliable clinical results.     

A transparotid transcutaneous approach for internal rigid fixation in condylar fractures

Closed versus open reduction in condyle fractures is a dilemma that may torment the plastic surgeon. Although at present it is accepted that there are fractures that must be open reduced as when the middle cranial fossa or temporal fossa are involucrated, foreign body are in the joint capsule, lateral extracapsular deviation of condylar deviation, and open fractures. Risdon or retromandibular approaches are used for the treatment of fractures in the condyle neck and superior third of the lower ramus.When both approaches are used the correct placement of screws is very difficult for the following reasons: 1. Both drill and screwdrivers must be placed in an oblique direction to the bone surface; as a result, screws do not press the plate toward the bone and therefore a deficient stabilization results; 2. A distraction of too much soft tissue entrapped between the skin and mandibular bone is necessary for a good visual to surgical field and 3. The parotid tissue, the masseter muscle, and the facial nerve must be strongly distracted facilitating the nerve injury.A transcutaneous transparotid approach is the most appropriate for screws placement. By means of transbuccal set it is possible to reach the mandibular bone going through both the parotid tissue and the masseter muscle avoiding the injury the branches of the facial nerve.A case report illustrates the practical application of the above technique and it shows that as the lesion of branches of the facial nerve can be avoided.     

耳周切口治疗髁突颈部骨折

目的:介绍一种新的治疗髁突颈部骨折的手术入路。方法:通过改良的耳周小切口,经腮腺入路,对31例36侧髁突骨折行小型钛板坚强内固定术。术后随访3个月,从患者的开口度、咬合关系、面神经功能和影像学检查等方面进行疗效分析。结果:31例患者中,2例出现暂时性面神经功能不全,所有患者均咬合关系良好,张口度最大者4.8 cm,最小者3.0 cm,平均张口度4.0 cm,无张口偏斜。术后3个月CT显示所有患者髁突均完全解剖复位。结论:较之传统手术切口,改良的腮腺入路切口隐蔽,手术创伤小,利于面神经保护,且能达到髁突骨折解剖复位和坚强内固定的要求。     

How to improve retromandibular transmasseteric anteroparotid approach for mandibular condylar fractures: our clinical experience

Fractures of the mandibular condyle are common and account for 25–35% of all mandibular fractures reported in the literature. Even with the development of a consensus on the preference for open reduction and internal fixation of these fractures, the clinician is still faced with a dilemma concerning the optimal approach to the ramus–condyle unit. Limited access and injury to the facial nerve are the most common problems. The most commonly used extraoral approaches are the submandibular, retromandibular and preauricular methods. In this study, we propose a modified cosmetic preauricular incision with a short end in the neck, to improve the transmasseteric anteroparotid (TMAP) approach previously described by Wilson et al. in 2005. We retrospectively analysed 13 patients treated in our department for mandibular condylar fractures. Post-operative complications, occlusal status, interincisal opening and joint tenderness were evaluated at 3 months after surgery. The wider skin incision described here provides a convenient approach for open reduction and rigid internal fixation, and good results were obtained. The follow-up ranged from 6 to 40 months.     

The periauricular transparotid approach for open reduction and internal fixation of condylar fractures.

INTRODUCTION: Treatment of fractures of the mandibular condyle fractures varies among centres as there still is no general consensus. The aim of this paper was to determine the safety and efficiency of surgical treatment using a transparotid approach for direct plating. PATIENTS AND METHODS: A prospective clinical study was conducted on 34 patients with 36 fractures of the condyle. All 36 fractures were displaced, and 14 (39%) of them were fracture dislocations. The fractures were treated surgically with a transparotid facelift or retromandibular approach using miniplates and screws for fixation. Patients were carefully followed up and were asked to answer a survey paper 2-39 months postoperatively. RESULTS: Occlusion practically identical to the pretraumatic condition was achieved in 31 out of 33 dentate patients (94%). Postoperative interincisal distance was 30-61 mm (mean 44 mm), 4 patients (12%) had postoperative deflection to the side of injury during mouth opening. Facial symmetry was achieved in all of the patients. Eight out of 36 cases (22%) had a transient weakness of certain ipsilateral facial muscle groups, lasting for 4-8 weeks. In one of these patients, a mild weakness of the upper lip and lower eyelid persisted after 13 months. There were 5 cases of miniplate fractures (14%), all of them in patients in whom 1.7 or thinner miniplates were used. There were 5 cases of salivary fistulae (14%), all of them in patients where the parotid capsule was not closed in a watertight fashion. According to the postoperative survey completed by 32 patients, 30 of them (94%) were very satisfied with the outcome of treatment. CONCLUSION: If conducted properly, the transparotid facelift approach offers a safe and effective approach for direct fixation of condylar fractures.     

Comparison of various approaches for the treatment of fractures of the mandibular condylar process

Fractures of the mandibular condyle process are the most common fractures of the lower jaw. Unfortunately, the type of treatment is still a matter of debate.PurposeThe aim of this investigation was to compare the outcome of different treatment approaches regarding function and surgical side-effects.Patients and methods111 fractures of the mandibular condyle representing all types according to the classification of Spiessl and Schroll were included. Both closed reduction (CR) and open reduction with internal fixation (ORIF) including the retromandibular/transparotid, submandibular, preauricular and intraoral approach were performed. The clinical examination included functional and aesthetic aspects at least 1 year after the fracture.ResultsThe majority of fractures (45%) were classified into Type II and IV according to Spiessl and Schroll followed by fractures without any displacement or dislocation (29.7%). The submandibular approach showed the worst outcome regarding permanent palsy of the facial nerve and hypertrophic scarring. No significant differences between the various approaches were detected in the functional status in any diagnosis group.ConclusionInferior condylar neck fractures benefit from ORIF by an intraoral approach whereas in high condylar neck fractures the retromandibular/transparotid approach shows the best results. Fractures of the condylar head were almost all treated by CR and our results cannot contribute to the debate of CR vs. ORIF in this type of fracture.     

穿腮腺入路治疗髁颈及髁突基底部骨折

目的：探讨穿腮腺入路治疗髁颈及髁突基底部的安全性及有效性。方法：对15例（21侧）髁颈及髁突基底部骨折患者选择穿腮腺入路切开复位内固定术。结果：15例患者,21例侧髁突骨折行手术治疗。19例侧髁突骨折选择2块接骨板固定,2例侧选择1块接骨板固定。所有患者伤口均一期愈合,术后复查全口曲面断层片或三维CT示骨折断端对位良好。除1例患侧后牙暂时性轻度开外,所有患者咬合关系恢复良好。术后1个月复查,张口度32～45mm（平均38mm）。3例侧出现面神经损伤症状,术后3个月内均恢复正常,无1例出现永久性面瘫。所有患者均未出现涎瘘、感染等并发症。结论：相对于髁突骨折的颌后及颌下入路,穿腮腺入路行髁突骨折切开复位内固定术,容易暴露,可直视下完成骨折复位固定,是治疗髁颈和髁突基底部骨折安全有效的手术入路。     

Transmasseteric antero-parotid approach for open reduction and internal fixation of condylar fractures

The morbidity that results from surgical approaches to the condylar neck, and the time-consuming nature of the operation inhibits many surgeons from using open reduction and internal fixation for the treatment of condylar fractures. The many approaches that have been described stand testimony to the disadvantages of the individual techniques. The most common problems are limited access and injury to the facial nerve. We describe the transmasseteric antero-parotid (TMAP) technique, which offers swift access to the condylar neck while substantially reducing the risk to the facial nerve and eliminating the complications associated with transparotid approaches.     

24例髁突骨折经下颌后进路行坚强内固定的疗效观察

目的:介绍发生于髁突颈和髁颈以下髁突骨折用小型钛板经下颌后进路行解剖复位、坚强内固定术的方法和经验。方法:发生于髁突颈和髁颈以下骨折24例30侧,经下颌后进路以小型钛板行坚强内固定术。术后3～6个月后复查并评价疗效,复查内容包括:张口度、张口型、咬合关系、X线表现、面神经损伤情况。结果:张口度较术前明显增大,张口型偏移明显改善,错牙合3例,面神经下颌缘支损伤2例。X线检查:髁突骨折复位良好,髁突无移位。结论:下颌后进路是一种治疗髁突颈和髁颈以下骨折的有效方法。     

Extraoral approach to mandibular condylar fractures: Our experience with 100 cases

IntroductionMandibular condylar fractures are very common. The current literature contains many indications and methods of treatment. Extraoral approaches are complicated by the need to avoid injury to the facial nerve. On the other hand intraoral approaches can make fracture reduction and/or fixation difficult. The mini-retromandibular approach provides an excellent view of the surgical field, minimises the risk of injury to the facial nerve, and allows rapid and easy management of condylar fractures.We have collected and reviewed our first 100 condylar fractures treated by means of a mini-retromandibular approach.Patients and methodsBetween June 2006 and June 2012, Eighty-seven patients with extracapsular condylar fractures underwent open reduction and rigid fixation for 100 extracapsular condylar fractures via a mini-retromandibular approach.ResultsDental occlusion and anatomic reduction were restored in all 100 condylar fractures. Postoperative infection developed in three patients. There was one sialocele and one case of plate fracture. Four patients experienced transient palsy of the buccal branch of the facial nerve. No permanent deficit of any facial nerve branch was observed.No patient showed condylar head resorption.ConclusionsOur experience with the treatment of the first 100 condylar fractures using the mini-retromandibular approach has demonstrated that this technique has allowed the Authors to safely manage extracapsular condylar fractures at all levels.     

Mini-retromandibular approach to condylar fractures

INTRODUCTION: Among maxillofacial surgeons, a general agreement exists that the therapeutic strategy for intracapsular condylar fractures is conservative, while the treatment of extracapsular fractures of the mandibular condyle is extremely controversial. The indications and choice of treatment are less than uniform, often relying on the surgeon's personal experience and beliefs. The literature increasingly suggests that the surgical management of these fractures is superior to conservative management in functional terms. Nonetheless, the indications for surgically treating condylar fractures are limited by fear of potential pitfalls related to the access. Extraoral routes to the condyle involve the risk of facial nerve injuries or visible scars; transoral access is free from these pitfalls but is demanding technically, especially for higher neck fractures. In our experience, a 2-cm-long retromandibular access allows straightforward management of condylar fractures, providing as a result a well concealed scar. MATERIALS AND METHODS: From 2006 to 2007, 21 patients with 25 condylar fractures were treated surgically using the mini-retromandibular access. The mean operating time was 32min (range 17-55min). No facial nerve injuries were observed. The first two patients developed postoperative infections. One patient, in whom the first intervention resulted in malreduction of the fracture because the access was insufficient (15mm incision), required a second operation to achieve correct reduction and rigid fixation of the condyle. RESULTS: In all cases, good anatomical stump reduction was achieved. All the patients obtained good articular function, since the access was exclusively extra-articular. CONCLUSIONS: Condylar fracture reduction, fixation and healing can be managed comfortably using a limited retromandibular approach. Moreover, the risk of facial nerve injury is limited as the nerve fibres are viewed directly.     

A comparative evaluation of retromandibular versus Modified Risdon approach in surgical treatment of condylar fracture

The purpose of this study was aimed to compare the efficiency and safety of retromandibular versus modified Risdon approach using periangular incision for open reduction and internal fixation of low subcondylar mandibular fracture. Open reduction and internal fixation with different plating systems were utilized via retromandibular approach (group I) and via modified Risdon approach with periangular incision (group II).Twenty four (n= 24) condylar fractures in 21 adult patients were divided randomly into two equal groups (12 each) according to the cutaneous incision (approach) utilized. The evaluation score for scarring in group I it was excellent in 9 patients, good in 2 patients and acceptable in only one patient (Mean 2.4 ± SD 3.38). While in group II was excellent in 10 patients and good in 2 patients (Mean 2.4 ± SD 3.87) and the p value was 0.591. Symptoms of transient facial nerve weakness were noted in only 3 patients in group I with slight to moderate dysfunction (Mean 2 ± SD 3.21), while only one patient had facial nerve weakness in group II with House - Brackman score of 2 immediate postoperatively and this got resolved in 6 weeks (Mean 2 ± SD 4.04) and the p value was 0.00022.Within the limitations of the study it seems that a modified Risdon approach using periangular incision for reduction and fixation of low subcondylar fracture should be preferred whenever possible because it yields better outcomes.