Distalization of mandibular molars comes with significant challenges, especially in adult and young adult patients. In selected cases, third molar extraction procedures offer the opportunity to place miniplates for anchorage to distalize mandibular molars, providing additional solutions to the traditional extraction of premolars or a single incisor. This approach can be of special interest to adult patients, who may have life commitments and time restraints that limit traditional orthodontic and surgical treatment options, and it can improve the efficiency of dental care. This case series describes 3 clinical scenarios in which miniplates were placed with minimal invasiveness during the removal of impacted third molars, offering the patients nontraditional orthodontic treatment options. Awareness of these options is essential for general dentists so that they can explain all treatment possibilities and provide appropriate referrals to patients with impacted third molars.

The aim of this proposal is to (1) review the current literature, (2) shed light on the importance of creating universally accepted guidelines, (3) provide help and guidance in the decision-making process with regard to the removal of mandibular third molars (M3Ms), and (4) reduce the risk of exposing the patient to unnecessary harm and complications due to the inappropriate removal or retention of M3Ms.It is obvious that the indications for the extraction of M3Ms will continue to be an area of controversy and strong debate. The evidence for or against prophylactic extraction is ambivalent; there is evidence to accept or reject the stance against prophylactic extraction in some specific cases, and there are published articles to support both opposing views. The available guidelines on the extraction of third molars are limited in number, and are mostly tailored to fit specific settings or countries. There are no available guidelines that might be widely used to help in the decision-making process for the international community. We hope this proposal will constitute an important first step toward creating universally accepted guidance.

OBJECTIVE: The aim of this study was to compare leukocyte and platelet-rich fibrin (L-PRF) and photobiomodulation (PBM) applications, which have been repeatedly reported to be superior to control groups, in terms of pain, soft tissue and bone healing in tooth extraction sockets.
METHODS: This double-blind, randomized clinical study was completed with 34 patients, who had an indication for extraction of their bilaterally impacted teeth. The right and left teeth of the patients were randomly divided into L-PRF and PBM groups. L-PRF group was treated with the blood product centrifuged for 12 min at 2700 rpm, and the PBM group was treated with a diode laser at different points for 60 s with a wavelength of 940 nm in repeated sessions. Postoperative pain was evaluated using Visual Analogue Scale (VAS), soft tissue healing with Landry Index (LI), tissue healing in the distal region of mandibular second molar by probing depth measurement, and bone healing via panoramic x-ray using the Image J program.
RESULTS: No statistically significant difference was found for any variable compared between the groups.
CONCLUSIONS: L-PRF and PBM applications provide similar support in the healing of extraction sockets. Nevertheless, the advantages and disadvantages of both methods determine their usage areas.
CONCLUSIONS: While L-PRF is advantageous in the early healing of extraction sockets, PBM may be preferred in terms of bone trabeculation in the long term.

暂无摘要。

OBJECTIVE: The first aim of this study was to determine whether there is a difference in degree of conversion (DC) of touch-cure cements polymerized by self-curing with adhesive or dual-curing under reduced light. The second aim was to compare interfacial adaptation of zirconia restoration cemented using touch-cure cements self-cured or dual-cured by reduced light.
METHODS: The DC of touch-cure resin cements with adhesive was measured continuously using Fourier transform infrared spectrometry. Experimental groups differed depending on touch-cure cement. Each group had three subgroups of polymerization method. For subgroup 1, the DC was measured by self-curing. For subgroups 2 and 3, the DCs were measured by dual-curing with reduced light penetrating 3 mm and 1 mm zirconia blocks, respectively. For interfacial adaptation evaluation, Class I cavity was prepared on an extracted third molar, and zirconia restoration was fabricated. The restoration was cemented using the same cement. Groups and subgroups for interfacial adaptation were the same as those of the DC measurement. After thermo-cycling, interfacial adaptation at the tooth-restoration interface was evaluated using swept-source optical coherence tomography imaging.
RESULTS: The DC of touch-cure cement differed depending on the measurement time, resin cement, and polymerization method (p < 0.05). Interfacial adaptation was different depending on the resin cement and polymerization method (p < 0.05).
CONCLUSIONS: For touch-cure cement, light-curing with higher irradiance presented a higher DC and superior interfacial adaptation than light-curing with lower irradiance or self-curing.
CONCLUSIONS: Although some adhesives accelerate the self-curing of touch-cure cement, light-curing for touch-cure cement is necessary for zirconia cementation.

OBJECTIVE: The aim of this retrospective study was to determine the prevalence and patterns of impacted third molars in a Trinidadian population.
METHODS: A total of 1500 orthopantomograms (OPG) taken at the School of Dentistry, University of the West Indies, from 2008 to 2019 in patients between 15 and 67 years old were evaluated. From the data collected, the prevalence of third molar impaction, the parameters of gender, angulation, level of impaction, and associated pathologies were evaluated. Other types of impacted teeth were also recorded.
RESULTS: Of the 1500 OPG viewed, 408 (27.2%) of the study sample presented with at least one impacted third molar. 161 (39.5%) were males and 247 (60.5%) were females, with a male-to-female ratio of 1:1.5. There was a greater incidence of mandibular third molars versus maxillary third molars, which had a frequency of 77.9% and 22.1%, respectively. The most common type of impaction (Winter\'s classification) was horizontal in the mandible and distoangular in the maxilla. The most common level of impaction in the mandible (Pell and Gregory classification) was level 1A. The total number of impacted teeth was 775, and of these, 75 (9.7%) showed other impacted teeth besides the third molars. Canines and second premolars were the most prevalent with 7.6% and 1.5%, respectively. Caries on the second molar (49.3%) and third molars (40%) were the most frequently associated pathologies identified.
CONCLUSIONS: The prevalence of impacted wisdom teeth in this study was 27%. These results raise awareness and provide insight among dental professionals in Trinidad as to the prevalence of impacted third molars, their patterns, as well as commonly associated pathologies, and the need for screening within the population.

Antiphospholipid syndrome (APS) is a systemic autoimmune condition characterised by recurrent venous or arterial thrombosis and pregnancy complications, with persistent antiphospholipid autoantibodies. APS is often found in conjunction with other autoimmune diseases, such as systemic lupus erythematosus (SLE). SLE-associated APS patients may require dental procedures like tooth extractions. Due to the complex nature of this autoimmune disorder, perioperative management requires a comprehensive approach involving various medical specialists.These patients are frequently taking medications like anticoagulants, antiplatelet drugs, disease-modifying drugs and immunosuppressants. This medication regimen can increase their risk of postoperative complications, including bleeding, thrombosis, delayed healing and postoperative infections. Currently, there are no established guidelines for performing tooth extractions in individuals with SLE-associated APS.We report a case of SLE-associated APS with pericoronitis requiring surgical extraction. The purpose of this report is to offer practical recommendations for the perioperative management of dental procedures and alteration in medications used in such cases.

BACKGROUND: Pyogenic spondylodiscitis is an infectious spinal disease that causes significant motor dysfunctions. Its diagnosis can be challenging owing to its rapid onset and nonspecific symptoms.
METHODS: A 79-year-old Japanese man with a history of type 2 diabetes mellitus and polymyalgia rheumatica presented to our department with tongue pain. Following partial glossectomy and wisdom tooth extraction under general anesthesia, on 10 postoperative day (POD) the patient developed right-sided abdominal pain and difficulty in walking. On 12 POD, the patient was admitted to a municipal hospital due to respiratory distress and paraplegia.
METHODS: The patient was diagnosed with pyogenic spondylodiscitis and empyema. Blood tests revealed elevated C-reactive protein levels (36.5), white blood cell count (19,570), and neutrophil count (17,867).
METHODS: The patient received meropenem hydrate 3 g/2 days as empiric antibiotic treatment for acute infection. Upon admission to the emergency department on 16 POD, the lung abscess was drained, hemilaminectomy was performed.
RESULTS: Blood cultures, sputum tests, and cultures from the thoracic and spinal abscesses drained during surgery revealed methicillin-sensitive Staphylococcus aureus. The infection was successfully managed, and the respiratory disturbance and inflammatory response improved. However, the lower half of the patient body remained paralyzed. Subsequently, the patient was transferred to a rehabilitation facility on 45 POD. The patient continued to undergo functional restoration training, gradually regained function, and eventually achieved the ability to walk with grasping gait.
CONCLUSIONS: This is the first case report of S aureus causing pyogenic spondylodiscitis and empyema due to blood stream infection from a post-oral surgical wound. Pyogenic spondylodiscitis arising from a secondary hematogenous infection is difficult to diagnose and can lead to severe functional impairment. Prompt and appropriate diagnosis and treatment based on detailed patient interviews, additional blood tests, and computed tomography are essential.

BACKGROUND Odontogenic keratocyst (OKC) is a common odontogenic cyst, and it occurs more frequently in the mandible, with the posterior region of the dental arch, the angle, or the ramus being the most commonly affected sites. Odontogenic keratocyst occurring within the maxillary sinus is extremely rare, accounting for only about 1% of cases. CASE REPORT A 20-year-old female patient without any clinical symptoms underwent an oral examination, during which a dense dental shadow was identified within the maxillary sinus, surrounded by a low-density shadow. Physical examination revealed absence of the left maxillary third molar, with intact mucosa. The patient reported no history of tooth extraction. X-ray and cone-beam computed tomography revealed a high-density image within the left maxillary sinus, resembling a tooth and surrounded by a soft-tissue shadow, which exhibited a greater density in comparison to conventional odontogenic cysts. The initial diagnosis was odontogenic keratocyst in the maxillary sinus with an ectopic maxillary third molar. Surgical enucleation of the cyst and extraction of the impacted tooth were carried out utilizing the Caldwell-Luc approach. Histopathological analysis confirmed the presence of OKC. No significant recurrence was noted during the 6 months of follow-up. CONCLUSIONS Odontogenic keratocysts in the maxillary sinus with ectopic third molar are rare and may not have any symptoms in the early stage. Surgery can be performed using the Caroler-Luke approach to achieve ideal treatment results. In view of the high recurrence rate of OKC, close follow-up should be conducted after surgery.

Most of the maxillary impacted third molars are located in the maxillary tuberosity, where the vision and operation space are limited. This paper reports a case of surgical extraction of the left maxillary horizontal superhigh impacted third molar, which is located between the roots of the adjacent teeth and is closely related to the maxillary sinus. The digital simulation technology was used to reconstruct a three-dimensional visual image of the patient\'s maxilla, related teeth, and other adjacent anatomical structures to assist in finding the optimal surgical method accurately. Root dislocation before the crown not only protects the roots of the adjacent tooth, but also reduces the risk of maxillary sinus lining damage or perforation during operative procedures, improves the efficiency of the operation, and reduces surgical trauma, which conforms to the concept of minimally invasive surgery and provides a new idea and experience for the clinical extraction of such maxillary impacted third molars.
上颌阻生第三磨牙多位于上颌结节区，此区域手术操作空间小、视野差。本文报道1例牙冠位于邻牙两牙根之间、与上颌窦关系密切的上颌水平超高位阻生第三磨牙的拔除。利用数字化模拟技术三维重建患者部分上颌骨、相关牙齿等毗邻解剖结构，精准制定最佳手术方案，采用牙根先脱位、牙冠后脱位法拔除阻生牙。该法既保护了邻牙牙根，也降低了上颌窦黏膜损伤以及穿孔的风险，提高了手术效率，减小了手术创伤，符合微创牙槽外科理念，为临床上拔除此类埋伏阻生牙提供了新思路和经验。.