Which factors affect the lingual fracture pattern in sagittal split ramus osteotomy?

The purpose of this study was to elucidate the effects of mandibular anatomy and osteotomy technique on lingual fracture patterns in SSRO. The predictor variables were: length of horizontal medial osteotomy; type of border osteotomy; buccolingual width; and vertical length of the basal cortex. The outcome variable was the type of lingual split pattern. This was categorized into four types according to a lingual split scale (LSS): LSS 1, true Hunsuck; LSS 2, fracture line to posterior border of the ramus; LSS 3, through to mandibular canal; LSS 4, unfavorable fracture pattern. Data were analyzed using analysis of variance and the Pearson χ2 test. Values of p < 0.05 were considered statistically significant. The study sample comprised 312 lingual split patterns in 156 patients. The most common type of lingual split pattern was LSS 1 (n = 204). There was a significant relationship between inferior border osteotomy type and LSS type (p = 0.001). Whilst LSS 1 was the most common among all border osteotomy types. LSS 4 was most frequently observed in cases where the lower border osteotomy remained in the buccal surface. According to the results of this study, the likelihood of an unfavorable split pattern increases when the lower border osteotomy remains in the buccal surface.

Clinical, biochemical, and genotypical characteristics in urea cycle mitochondrial transporter disorders

BACKGROUND

This study aimed to evaluate clinical, biochemical, and genotypic findings of patients diagnosed with urea cycle mitochondrial transporter disorders.

CASE SERIES

In this study, patients followed up with the diagnosis of urea cycle mitochondrial transporter disorders in the pediatric metabolism outpatient clinic of Diyarbakir Children's Hospital were retrospectively examined. Height, weight, head circumference, gender, age at diagnosis, follow-up period, consanguinity history between parents, and treatments of the patients included in the study were evaluated. Eight patients suffering from urea cycle mitochondrial transporter disorders were enrolled in the study. Five patients were found to have biallelic variants of the SLC25A15 gene. Two patients were found to have biallelic variants of the SLC25A13 gene. Two of our patients presented with gait disturbances and were diagnosed with HHH syndrome. One patient presented with liver failure and was diagnosed with HHH syndrome. The other three patients were identified by family screening. Citrin deficiency was detected in two patients with cholestasis and hepatomegaly in the infantile period. Ornithine levels increased in three of our patients with HHH syndrome during the first month of treatment despite a protein-restricted diet and adequate caloric intake.

CONCLUSIONS

Increasing patients' caloric intake with HHH syndrome improves their ornithine levels. Our patients with citrin deficiency recovered clinically and biochemically before seven months.

PREEMPTIVE INTRAVENOUS IBUPROFEN AND LOCAL KETAMINE IMPROVE POSTOPERATIVE ANALGESIA FOLLOWING THIRD MOLAR SURGERY: A DOUBLE-BLIND, RANDOMIZED, PLACEBO-CONTROLLED CLINICAL STUDY

OBJECTIVE

To compare the efficacy of preemptive ibuprofen, local ketamine, and their combination in managing postoperative pain and trismus following third molar surgery.

MATERIALS AND METHODS

One hundred patients were randomly divided into 4 groups. The Intrafen Group had their impacted third molars surgically removed under local anesthesia after receiving intravenous (IV) ibuprofen for preemptive effect. The Ketamine Group received an IV placebo before the surgery, and the extraction process was completed with a local anesthetic-ketamine combination. The Combined Group received preemptive IV ibuprofen before the procedure, and the surgery was performed with a local anesthetic-ketamine combination. The Control Group received an IV placebo before the procedure and then had their impacted third molars removed under local anesthesia. The Visual Analogue Scale (VAS) values, corresponding to the patients' pain levels at the 2nd and 12th postoperative hours and the total amount of analgesic dose used in the first 24 hours, were recorded, and evaluated. The maximum mouth opening of the patients was measured immediately before the procedure, and on the second and seventh postoperative days. The level of patient satisfaction in all groups was assessed during the procedure.

RESULTS

The mean VAS value corresponding to the second-hour pain level of the combined group was statistically significantly lower than the other groups (P = .003). A statistically significant difference was found in the mean VAS values corresponding to the pain levels of the groups, favoring the combined group compared to the other groups (P ≤ .001). A significant difference was observed between the VAS difference values corresponding to the pain levels of the Intrafen group and the Ketamine group, favoring the Intrafen group (P = .038). The Ketamine group consumed the most analgesic on average over the first 24 hours, whereas the Combined group consumed the least. No statistically significant difference was found between the mean trismus levels of the groups on days 0-2 (P = .528) and days 0-7 (P = .129). The intraoperative patient satisfaction level of the combined group was significantly higher than that of the other groups (P = .030).

CONCLUSION

Preemptive Intrafen is an effective regimen for postoperative pain management and is superior to the local anesthetic-ketamine regimen. The most effective method to reduce postoperative pain following third molar surgery is to use a combination of these 2 regimens. However, none of the treatment methods used in the study had a positive effect on postoperative trismus.

Does the Posterior Bending Osteotomy In Bilateral Sagittal Split Osteotomy Affect the Condyle Position in Asymmetric Patients?

PURPOSE

To measure and compare changes in postoperative condylar position following bilateral sagittal split osteotomy in patients with asymmetry treated using a posterior bending osteotomy (PBO) and conventional methods (shaving of premature contacts).

METHODS

Participants were randomized to either the PBO or conventional group. The inclusion criteria were the need bilateral sagittal split osteotomy or bimaxillary asymmetric surgery (menton deviation >4 mm). The primary outcome variable was changes in the condylar position in the axial, coronal, and sagittal planes 6 months after surgery, whereas the secondary outcome variable was changes in temporomandibular joint symptoms. Covariates included surgery type, deformity type, age, and sex. Categorical and numerical variables were analyzed using Fisher exact χ² test and 2-way analysis of covariance.

RESULTS

The study sample comprised 42 patients with a mean age of 23.3 years; 57.5% were women. The alteration in the coronal condyle angle was 0.8⁰ ± 0.86⁰ in the PBO and 2.72⁰ ± 0.81⁰ in the conventional group. The differences in the condylar position in the coronal plane were not statistically significant (P = .129). The alteration in the axial condyle angle was 2.31⁰ ± 1.74⁰ in the PBO group and 5.65⁰ ± 1.65⁰ in the conventional group. The alteration in the sagittal plane was 0.44⁰ ± 1.52⁰ in PBO and 0.47⁰ ± 1.44⁰ in the conventional group. Alterations in axial (P = .194) and sagittal (P = .976) condylar positions were insignificant. In the conventional group, statistically significant differences were found in the axial (P = .002) and coronal (P = .002) planes, and the condyle turned inward in both planes. There were no statistically significant differences between the groups or within the groups in the sagittal plane (P > 0,5). In PBO and conventional groups, joint noise examination revealed positive results in 11 and 6 patients preoperatively and 1 and 2 patients postoperatively, respectively. A statistically significant decrease in joint noise was detected in the PBO group (P = 0,04). The maximum mouth opening without pain was 5.95 ± 1.47 in the PBO group and 7.91 ± 1.39 in the conventional group, respectively. The alteration was not statistically significant between the groups but was significant within the groups (P < .001).

CONCLUSIONS

PBO effectively prevents premature contact between mandibular segments in facial asymmetry.

Comparison of the accuracy of pilot-drill-guided and fully guided implant surgery with dynamic navigation. In vitro model study

The aims of the present study are to measure and compare dental implant deviations with fully guided and pilot-drill-guided protocols using dynamic navigation systems in polyurethane models. The pilot-drill-guided group was determined to be the study group and included 12 implant applications. In this group, the pilot hole was drilled with navigation guidance, and the procedure was completed freehandedly. In the control group, all the drilling and implant placement steps were performed using the navigation system, and a total of 12 implants were placed. The pre- and postoperative images were compared to calculate the magnitude of implant deviation. The quantitative data of the two groups were compared using the independent-samples t-test and Mann-Whitney U-test. The analyses revealed that the length of the procedure significantly differed between the two groups (p < 0.001). The procedure duration was significantly shorter in the study group. The entry deviation values of the two groups were not significantly different (p = 0.079). The analysis revealed the apex deviation to be higher in the study group than in the control group (p = 0.003). However, the two-dimensional vertical apex deviation values of the implants were not significantly different between groups (p = 0.068). Angular deviation was determined to be significantly higher in the study group (p < 0.001). In the present study, all implants were successfully placed in the models using a dynamic navigation system. The results of this study may be useful for future clinical studies.

Evaluation of trabecular bone healing using fractal dimension analysis after augmentation of alveolar crests with autogenous bone grafts: a preliminary study

OBJECTIVE

The aim of this study is to evaluate bone remodeling after alveolar crest augmentation with autogenous bone grafts.

METHODS

50 patients who were applied augmentation due to alveolar deficiency were included in this study. Fractal dimensions were measured on the radiographs in the preoperative, postoperative, follow-up periods. The ROI was selected specific to each patient, but repeated in a standardized manner on subsequent radiographs.

RESULTS

A total of 50 patients were included in the study; There were 31 females and 19 males. Implants were placed in all patients without any complications. The mean fractal dimensions on the graft recipient side were statistically higher in the postoperative 5th month compared to the postoperative 1st week (p = 0.002). The mean fractal dimensions on the donor side were statistically higher in the preoperative and postoperative 5th month compared to the postoperative 1st week (p < 0.001).

CONCLUSION

Any clinical imaging method cannot fully reflect the histological microstructures of the bone. Evaluating the fractal analysis together with the clinical results can demonstrate adequate bone healing and quality prior to implant placement. Fractal analysis is a non-invasive, reproducible, method but further, prospective, randomized, controlled clinical studies are needed to estimate bone quality prior to implant placement.

A comparative evaluation of parasymphyseal fracture fixation in edentulous patients performed using dynamic navigation systems and Herbert screws with the conventional two-plate method: A study on models

PURPOSE

The investigators performed this study to compare the rigidity outcomes for minimally invasive fixation of edentulous mandibular parasymphyseal fractures without flap creation using Herbert screws with a dynamic navigation system and the conventional two-plate method.

METHODS

The investigators implemented an in-vitro study design, and 20 polyurethane edentulous mandibular models covered with flexible plastic to simulate the gingiva were used. Parasymphyseal fractures were created in all models using a reciprocal saw. In the study group, the fracture segments in each model were planned to be fixed using two 30-mm Herbert screws. The Herbert screws were placed using a screwdriver with the dynamic navigation system guiding the process. In the control group, to simulate open reduction, the fracture fragments were fixed using two 4-hole straight titanium plates and 6-mm titanium screws. All mandibular models on the prepared platform were attached to the biomechanical testing machine. They were subjected to a continuous linear compression until plastic deformation occurred. Displacement resistance was measured once for every model when the displacement reached 1, 3, 5, 10, and 15 mm. Furthermore, the maximum breaking forces that the models could withstand before deformation were measured. Data were analyzed using independent samples t-test. A value of p < .05 was considered statistically significant.

RESULTS

Manual examination of the models did not reveal any mobility between the fragments. In all evaluated displacement steps, the models fixed using Herbert screws showed significantly higher resistance to mechanical loading compared to the models fixed using parallel miniplates.

CONCLUSION

In present study, parasymphyseal fracture of edentulous mandible models were fixed successfully using Herbert screws with the dynamic navigation system. The results of this study may encourage future clinical studies.

Contribution of neutrophil-to-lymphocyte ratio to decisions regarding sur-gical therapy in patients diagnosed with intestinal obstruction

BACKGROUND

Neutrophil-to-lymphocyte ratio (NLR) has been reported to be a valuable diagnostic tool in the decision-making process for surgical procedures in cases requiring urgent intervention. It was also reported that NLR could be used as an independent predictor of septic shock, hospitalization in the intensive care unit, and death in patients with a liver abscess. This study aimed to investigate the contribution of the NLR, which is a cheap and easily calculable marker, to decisions regarding surgical therapy in patients with intestinal obstruction (IO).

METHODS

Ninety-one patients hospitalized with IO were enrolled in this retrospective study. There were two groups: a surgical therapy group and a conservative therapy group. Complete blood count (CBC) parameters and NLR values were statistically evaluated to determine whether there was any difference between the groups.

RESULTS

The results obtained from the initial CBC tests were compared between the patients receiving surgical therapy (n =30) and conservative therapy (n =61). There was no statistically significant difference in white blood cell counts between the groups (p =0.225). However, there was a statistically significant difference in NLR values between the patients receiving surgical and conservative therapy (p =0.023).

CONCLUSION

Similar to previous studies investigating other inflammation criteria, we found that high NLR values were statistically significant in favor of the surgical therapy group in determining the need for surgery in ileus cases. The data obtained in our study demonstrate that the NLR measurement contributes to early decision-making concerning surgical therapy in patients with IO at the time of their initial admission to the emergency department. HIPPOKRATIA 2019, 23(4): 160-164.

Closure of Oroantral Communication With Plasma-Rich Fibrin Membrane

Oroantral communication (OAC) is the opening between the maxillary sinus and oral cavity. It may cause oroantral fistula or maxillary sinusitis if left untreated. The surgical closure of the OAC within 48 hours was recommended to avoid the complications like sinus infections. The aim of this study is to evaluate the treatment of OACs with plasma-rich fibrin (PRF) which is safe and easy to implement in the OACs.This study was conducted with the patients, who required the treatment of the OAC, which was developed after the posterior maxillary tooth extraction in the Dental and Maxillofacial Department of the Faculty of Dentistry in Adnan Menderes University.Plasma-rich fibrin membranes were inserted in layers into the tooth socket so that they covered the OAC. Then these membranes were fixated with the sutures to the surrounding gingiva. Antibiotic (amoxicillin/clavulanic acid 1000 mg), analgesic (dexketoprofen trometamol and/or paracetamol), and oral rinse (0.2% chlorhexidine digluconate) agents were prescribed to all patients. The patients were examined in the 3rd and 7th days and 2 months after the operation.All patients tolerated PRF perfectly, and the soft tissue recovery was completed without any problem. Full epithelization was observed in the defect area in all patients. The OAC did not relapse in any patient.Plasma-rich fibrin technique is a simple and effective method, which can be used in the treatment of OACs with a diameter of 5 mm or less with a low risk of complications.

Safest light in a combat area while performing intravenous access in the dark

Introduction

Cannulation for the administration of intravenous fluids is integral to the prehospital management of injured military patients. However, this may be technically challenging to undertake during night-time conditions where the use of light to aid cannulation may give the tactical situation away to opponents. The aim of this study was to investigate the success and tactical safety of venepuncture under battlefield conditions with different colour light sources.

Method

The procedure was carried out with naked eye in a bright room in the absence of a separate light source, with a naked eye in a dark room under red, white, blue and green light sources and under an infrared light source while wearing night vision goggles (NVGs). The success, safety, degree of difficulty and completion time for each procedure were then explored.

Results

All interventions made in daylight and in a dark room were found to be 100% successful. Interventions performed under infrared light while wearing NVGs took longer than under other light sources or in daylight. Interventions performed under blue light were tactically safer when compared with interventions performed under different light sources.

Conclusion

Blue light offered the best tactical safety during intravenous cannulation under night-time conditions and is recommended for future use in tactical casualty care. The use of NVGs using infrared light cannot be recommended if there is the possibility of opponents having access to the technology.

Does Guided Bone Regeneration Prevent Unfavorable Bone Shapes in Distraction Gap?

PURPOSE

Complications related to distraction osteogenesis can cause degradation of newly regenerated bone. Additionally, an unfavorable shape of the regenerated bone at the distraction gap can reduce the quantity of regenerated bone. The aim of the present study was to report on the prevention of unfavorable shapes of regenerated bone using guided bone regeneration during distraction.

MATERIALS AND METHODS

Bilateral alveolar distraction was performed in 10 beagle dog mandibles. One side of the mandible formed the experimental group and the other side served as the control group. In the experimental group, guided bone regeneration was performed simultaneously with distraction osteogenesis. In the control group, only alveolar distraction was applied. At the end of a 1-week latent period, all mandibles were distracted 10 mm (1 mm/day). After the distraction period, 3 months were allowed for consolidation. After consolidation, all the dogs were euthanized, and the shape of the regenerated bone was determined to be either favorable or unfavorable. Densitometric evaluation and area measurements were performed using computed tomography scans. Statistical evaluation was performed using the independent t test, with a significance level of P < .05.

RESULTS

In the experimental group, no unfavorable bone shape developed in the distraction gap, and the new bone had a surface and volume similar to those of the segments. In contrast, in the control group, 4 mandibles had an unfavorable bone shape in the distraction gap and 4 showed favorable bone healing with no defect. The surface area of the regenerating bone in the experimental group was significantly greater than that in the control group. Also, the surface area differed significantly between the experimental and control groups (P < .05). However, the densitometric values did not differ between the 2 groups (P < .05).

CONCLUSIONS

Concomitant use of guided bone regeneration with distraction osteogenesis could be an optimal method for generating a favorable bone shape within the distraction gap.

Cases of extranodal lymphoma in the head and neck region

18544

Background: Primary extranodal lymphomas of the head and neck region constitute 10–20% of all NHLs. Since they are frequently encountered as localised disease, radiotherapy accounts for the important part in the treatment although other modalities are also available. Cases with the diagnosis of primary extranodal lymphomas of the head and neck region, who administered to our clinic were evaluated retrospectively and presented here. Materials and Methods: Total 13 patients who administered to the Radiation Oncology Clinic of Kartal Education and Research Hospital between years 2000 and 2005, with the diagnosis of primary extranodal lymphoma of the head and neck region were enrolled into the study. All information was gathered from the patients‘ files and evaluated in the electronic environment. Results: Median age was 61 (36–80). Nine patients (69%) were female, and 4 patients (41%) were male. Primary site was found to be tonsil in 8 cases (61%), nasopharynx in 4 cases (30%), and thyroid in one case (7%). Of the 13 cases, 5 (38%) had stage 1, 4 (30%) stage II, 3 (23%) stage III, and 1 (9%) stage IV diseases. Histological type was diffuse large B-cell lymphoma in 8 patients (7 originating from tonsil, 1 from thyroid), T-cell lymphoma in 2 patients (originating from nasopharynx), poorly differentiated histiocytic lymphoma in 1 patient (originating from nasopharynx), and diffuse mixed large B-cell and small B-cell lymphoma in 1 patient. Therapeutic approach was CT+RT in 7 cases, CT+RT+surgery in 3 cases, CT+ surgery in 1 case, RT+ surgery in 1 case, and CT alone in 1 case. Total 44 Gy RT was performed in 22 fractions to involved fields and regional lymph nodes by using cobalt 60 machine. Median 4 cycles of CT that consisted of CHOP were performed to the patients. Of the 13 patients 10 are still under control with no medical problem. One patient with stage 4 disease was lost under treatment after 3 cycles of CT. One case with nasopharyngeal lymphoma was referred due to progression after 2 series of CT, and died 1 month after palliative RT. One case with stage IB tonsil lymphoma received 2 cycles of CT+ RT+ 2 cycles of CT, and died of other medical reason during her 12th month follow up period. Conclusion: Primary extranodal lymphomas of the head and neck region constitute a heterogeneous group of patients, and RT represents an important part of the treatment.

No significant financial relationships to disclose.

Clinical characteristics and treatment responses in cases diagnosed as reactive attachment disorder

The aim of our study is to report the relation between pathological care and impairment in social interaction, communication, language development, and stereotypical behaviors. Fifteen cases (9 boys, 6 girls) who have the symptoms listed above and who were misdiagnosed with pervasive developmental disorder (PDD), were referred to our clinic for evaluation and treatment. After the cases were evaluated by a semi-structured interview, symptoms related to pathological care were fortified; maternal depressive symptoms associated with child neglect and overexposure to television viewing. The cases and the mothers/primary caretakers were treated in a standardized psycho-educational program of 3 months. After this period improvements were observed in all of the symptom clusters. Twelve cases (80%) had improvements in eye contact. Eleven cases (73.3%) began to engage in reciprocal play and ten cases (66.6%) showed social imitative behaviors. Six cases (40%) began to form sentences. Stereotypic behaviors diminished in six cases (40%) and disappeared in nine cases (60%). According to our findings, although the symptoms of PDD and reactive attachment disorder (RAD) resemble each other, presence of pathological care and good response to treatment in RAD can be important for the differential diagnosis with PDD.

Solitary plasmacytoma of the calvarium

A solitary plasmacytoma of the calvarium was removed radically without postoperative radiotherapy. A 69-year-old female patient was operated for a giant solitary plasmacytoma in the frontal region and the follow-up over 10 years revealed no recurrence. The authors discuss that solitary plasmacytoma of the calvarium may have a good prognosis if radically removed and the radiotherapy may not be necessary.

Primary multiple hydatid cysts of the brain: case report

Primary multiple hydatid cyst in the brain is uncommon. We report two large primary multiple hydatid cysts of the brain in an adult, which were removed without rupture by two separate operations.

Von Hippel-Lindau disease: analysis of two families

In this report we present two families with von Hippel-Lindau syndrome. We operated on haemangioblastomas in two members, one from each, in our clinic. In the first family we saw 17 lesions in 9 members. Although in the first family carcinoma of the kidney was often observed, in the second family retinal haemangioma was found to be predominant, namely, in eight out of nine patients. In both families there were 11 patients with retinal haemangioma; of these, 9 patients were blind (82%). In 6 patients with retinal haemangioblastoma blindness was unilateral and bilateral only in one. All the patients with renal carcinoma were male and died young. In one of our patients with renal carcinoma we found metastatic lesions in the distal and proximal parts of the femur, vertebral arch, cranium and the thoracic wall. In these two families 23 members had 32 lesions, from which eleven were retinal haemangiomas (3 + 8), nine haemangioblastomas of CNS (5 + 4), one a renal cyst (0 + 1), eight renal carcinomas (7 + 1), two pancreatic cysts (1 + 1) and one liver cyst (0 + 1).

Entrapment neuropathy of the median nerve at the level of the ligament of Struthers

The presence of a supracondylar process and Struthers' ligament is a rare congenital anomaly that may cause compression of either the median nerve, the brachial artery, or both. The authors present a case in which the supracondylar process and Struthers' ligament compressed both the median nerve and the brachial artery. This case is unusual, in that the symptoms of compression of the brachial artery increased--namely, the pulse intensity decreased and the pain increased with elbow flexion.

Hemangioma of the peroneal nerve: case report and review of the literature

A case of hemangioma of the peroneal nerve is presented. The tumor, which exerted compression on the main trunk of the peroneal nerve, was excised without causing damage to the nerve. Symptoms due to compression vanished within a month, and there was no recurrence in the 14 months that followed.