The Showcases of Dental History - A Time Machine in Miniature at the University of Puerto Rico: Part I.

The evolution of 20-year-old dental museum-like showcases located in the lobby and the main hallway of the School of Dental Medicine, Puerto Rico (PR) are described along with important professionals who impacted on this development.

The Showcases of Dental History - A time machine in miniature at the University of Puerto Rico: Part II - The Exhibits.

The University of Puerto Rico School of Dentistry was established in 1957. Over the years, it has played an important role in Puerto Rico's healthcare system. That legacy is displayed through the walls of the School of Dentistry. In Part 1, the evolution of 20-year-old dental museum-like showcases located in the lobby and the main hallway of the school were described along with important professions who impacted on this development. In this paper, we will describe in detail the items available at the museum.

Facial trauma in the major league baseball.

OBJECTIVE: The objectives of this study were to identify and describe significant facial trauma present in Major League Baseball (MLB) that resulted in players missing games or being placed in the injury reserve list. STUDY DESIGN: This was a retrospective cohort study. The predictor variables were the player's age, height, weight, body mass index, position, team conference, and if played games took place in playoffs season. The outcome variables were injury location (upper, middle, and lower facial third) and type of injury (soft tissue, fracture). Chi-square and logistic regression were computed to determine associations between predictor and outcome variables. RESULTS: A total of 109 players missed games due to facial injuries, and a total of 115 injuries were identified. Of the 115 injuries, none occurred in the upper facial third, 96 (83%) were in the middle third, and 19 (17%) in the lower third. Most fractures occurred in fielders (45%), and most soft tissue injuries in basemen (40%). CONCLUSIONS: Significant facial trauma in the MLB has risen in recent years. The player's height, conference, and playoff season were the most associated factors. Most injuries occurred in the periorbital area. A recommendation for the use of protection goggles can be made to prevent them.

Facial Injuries in the National Basketball Association.

BACKGROUND: Sport injuries can negatively impact physical and psychological aspects of athletes. There is a gap in the literature regarding facial trauma present in basketball. PURPOSE: The purpose of this study is to identify and describe facial trauma present in the National Basketball Association (NBA). STUDY DESIGN, SETTING, SAMPLE: This is a retrospective cohort study in which the sample (n = 206) consists of players that missed games due to facial injuries in the NBA, the data were collected from a public access online resource. INDEPENDENT VARIABLE: The predictor variables were player position (center, point guard, shooting guard, small forward, and power forward), team conference (Eastern/Western), and if played games occurred in playoff season. MAIN OUTCOME VARIABLES: The primary outcome variable was the injury location (upper, middle, and lower facial third), and the secondary outcome was type of injury (soft tissue/bone fracture). COVARIATES: Player's age, height, weight, and body mass index were collected. ANALYSES: χ2 and logistic regression were calculated to determine associations between predictor and outcome variables. Logistic regression was used to determine if variables were predictive for injury. Odds ratio was also computed for significant results. P value less than .05 (95% confidence interval) was considered statistically significant. RESULTS: A total of 206 players missed games due to facial injuries, and a total of 212 injuries were quantified. The mean age of the injured players was 27.24 ± 4.06 years, mean height (centimeters) was 201 ± 59.31 cm, mean weight (kilograms) was 99.48 ± 12.41 kg, and body mass index was 24.52 ± 1.75 kg/m2. Of the 212 injuries, none of them occurred in the upper facial third, 158 (75%) were in the middle third, and 54 (25%) were in the lower third; 151 of them were fractures (61%) and 61 were soft tissue injuries (29%). Most injuries were concentrated in centers (23%) and power forwards (23%). The most common fracture occurred in the nasal bones (39.2%), and most soft tissue injuries occurred in the eye globes (25%). Almost all injuries occurred during regular season games (97%), and the Eastern conference was slightly predominant (52%). CONCLUSION AND RELEVANCE: Significant facial trauma in the NBA has risen in recent years. The player's position, height, and weight were the primary factors associated with facial trauma in the NBA.

Histologic features of bone regenerated by means of negative pressure in the context of odontogenic keratocyst.

PURPOSE: The objective of the present research is to describe the histologic features of the bone regenerated by means of negative pressure (sugosteogenesis) in a group of patients diagnosed with odontogenic keratocyst (OKC) who underwent active decompression and distraction sugosteogenesis (ADDS) at our institution. MATERIALS AND METHODS: The authors designed a retrospective case series study. The population included patients with a histologic diagnosis of odontogenic keratocyst in whom active decompression and distraction sugosteogenesis followed by enucleation was performed. All patients were seen and followed from July 2019 to January 2021. The investigation was approved by the Institutional Review Board, and it observed the Declaration of Helsinki on medical protocol. Variables of this study included age, gender, anatomic location (mandible or maxilla), and histologic characteristics of the bone regenerated by means of negative pressure. Histologic features were defined as being consistent or inconsistent with viable mature bone. RESULTS: Bone biopsies of 6 patients were considered. In total, 83.33% of patients were males and 16.66% females. One hundred percent of the bone samples subjected to negative pressure showed features of viable mature bone. CONCLUSIONS: In this study, the histological features of the bone subjected to negative pressure demonstrated the normal characteristics of the mature, normal bone.

Maxillofacial Trauma Patterns in Bare-Knuckle Fighting.

PURPOSE: The purpose of this study is to analyze patterns and trends of maxillofacial injuries in bare-knuckle fighting. Results comparisons with other combat sports are provided in the Discussion section. MATERIALS AND METHODS: The study design is a retrospective cohort study. Data were collected by a single ringside physician who participated in all bouts. Predictor variables were number of rounds and final fight result (ie, knockout, technical knockout, and decision). The primary outcome variable was the frequency of maxillofacial injury, and secondary outcome variables were type of injury (laceration/fracture) and traumatic brain injury. The chi-square test was used to determine if there was any statistical significance between the predictor variables. RESULTS: Study sample consisted in fighters who suffered maxillofacial injuries during the matches from June 2018 to March 2022 (n = 177). A total of 177 fighters sustained maxillofacial trauma in 301 matches, and a total of 211 maxillofacial injuries were identified. Of the 211 injuries, 184 were lacerations and 27 were fractures. Proportionally more injuries occurred in matches that lasted 5 rounds (33%), and a significant association was found between the number of rounds fought and the frequency of injury (P < .00001). From a total of 107 technical knockouts, 74% of them caused at least 1 injury; from 96 knockouts, 60% caused at least 1 injury; and from 89 fights that ended in decision, 83% of them caused at least 1 injury. A statistically significant association was found between final fight result and frequency of injury (P < .00001). P value less than 0.05 (95% confidence interval) was considered statistically significant. CONCLUSIONS: Maxillofacial injuries were predominantly associated with longer fights and fights which result were knockout/technical knockout. Traumatic brain injury was associated with knockout results, which mostly occurred in the first and second rounds.

Potential role of active decompression and distraction sugosteogenesis for the management of ameloblastomas: Report of two cases and review of the literature.

Ameloblastomas are aggressive odontogenic entities well-known for their high tendency to recur. Clinical presentation includes lesions discovered on routine examination or radiographs, pathologies causing facial swelling, pain, cortical expansion, tooth mobility, root resorption, and paresthesia. Radiographic findings comprise large unilocular or multilocular radiolucencies with well-defined borders associated to an impacted tooth. Ameloblastomas are classified as unicystic, multicystic/solid, and peripheral. Treatment options include marsupialization, decompression, enucleation, or curettage with or without adjuvant measures such as Carnoy's solution, marginal resection, and segmental resection. Recently, active decompression with distraction sugosteogenesis (ADDS) was introduced for the conservative management of odontogenic cystic conditions. The purpose of this paper is to present 2 cases of a conventional ameloblastoma treated by means of ADDS. The purpose of this novel approach is to significantly reduce the amount of time required to decompress cystic-like lesions. In these cases, ADDS proved to be a viable treatment because it demonstrated a reduction in size of the initial lesion by new osseous formation within 2 weeks of placement of the device. The cases presented in this paper demonstrate that ADDS could be a valuable treatment modality for this type of ameloblastoma, although further research is necessary to validate this philosophy.

Historical evolution of surgical approaches to the face-part III: lower face.

Surgical approaches to the head and maxillofacial area have been described and modified by many authors throughout history. It was, however, during the nineteenth and twentieth centuries when most of the techniques were described, mainly thanks to the advent of anesthesia and antibiotic therapy. Currently, a myriad of surgical techniques are employed to access the maxillofacial complex, with each of them having advantages and disadvantages. Although the approaches are the subject of textbooks and articles, most do not describe the circumstances or the historical context under which they were designed. In a series of three articles, we will provide a historical perspective of the most common surgical approaches to the head and face employed today. Descriptions contain advantages and disadvantages and modifications are provided. The purpose of the present article (3/3) is to review the approaches to the lower face.

Historical evolution of surgical approaches to the face-part II: midface.

Surgical approaches to the head and maxillofacial area have been described and modified by multiple authors throughout history. It was during nineteenth and twentieth century when most of the techniques evolved due to advances in anesthesia and antibiotic therapy. Currently, a myriad of surgical approaches are employed to gain access to the maxillofacial complex, with each of them having advantages and disadvantages. Although the approaches are presented in numerous textbooks and articles, few texts describe the circumstances or historical context under which they were developed. In a series of three articles, we will provide a historical perspective of the evolution of the most common surgical approaches to the head and face employed today. Descriptions contain advantages and disadvantages of the approaches and modifications are also provided. The purpose of the present article (2/3) is to review the approaches to the midface.

Historical evolution of surgical approaches to the face-part I: head and upper face.

Surgical approaches to the head and maxillofacial area have been described and modified by many authors throughout history. It was, however, during the nineteenth and twentieth centuries due in large part to improvements in the delivery of anesthesia and antibiotic therapy when most of the techniques were described. Currently, a myriad of surgical techniques are employed to access the maxillofacial complex with advantages and disadvantages for each one. Although each approach is described in many text and articles, few describe the circumstances or the historical context under which they were designed. In a series of three articles, a historical perspective will be provided on the evolution of some of the most commonly employed today. Descriptions will enumerate the advantages and disadvantages of as well as later modifications. The purpose of the present article (1/3) is to review the approaches to the head and upper face.

Maxillofacial Trauma in the Ultimate Fighting Championship.

PURPOSE: The Ultimate Fighting Championship (UFC) is an American mixed martial art (MMA) company. This study aims to characterize patterns and trends of maxillofacial injuries in MMA. MATERIALS AND METHODS: The study design is a retrospective cohort study. Study sample consisted of fighters that suffered injuries during the matches from January 2015 to December 2019 (N = 259). The Athletic Commissions and corresponding fighting regulatory departments from 16 states and 24 countries were screened for medical reports released by UFC ringside physicians. Predictor variables were sex, weight division, injury location, injury type, and fight outcome (i.e., Technical Knockout/Knockout, Submission, Decision). Primary outcome variables were need for medical suspension and duration of medical suspension, secondary outcome variable was frequency of injury. Chi-square test was used to determine any statistical significance between predictor variables. One-way analysis of variance was used to determine any statistically significant differences between medical suspension times, sex, injury location, type of injury, weight divisions and fight outcome throughout the years. P value less than .05 (95% confidence interval [CI]) was considered statistically significant. RESULTS: A total of 259 fighters suffered injuries. Of the 319 total injuries, 291 (91.2%) occurred in male fighters, and 28 (8.8%) in females. Middle facial third injuries were the most common for both males and females; lower facial third injuries were proportionally similar. The male weight division with the longest medical suspensions were the light heavyweight (110.68 days) and welterweight (108.25 days) (P < .10166); the female weight division with the longest medical suspension was strawweight (88.92 days) and shortest was bantamweight (81.75 days) (P < .921123). CONCLUSIONS: Upper and midface trauma was predominant with fractures concentrated in the light heavyweight and welterweight divisions. Medical suspensions duration were longer in the light heavyweight and welterweight divisions.

Third molar surgery: Past, present, and the future.

Third molar surgery is the most common ambulatory procedure done by oral and maxillofacial surgeons. Surgical approaches for the removal of third molars have been published since the 20th century. This article reviews the history and development of extraction techniques through a literature review. The literature was selected through a search of an electronic database. Key words for the Medline search were "mandibular/maxillary third molar," "impacted mandibular/maxillary third molar," "mandibular/maxillary third molar flap design," and "mandibular/maxillary third molar incision." The search was restricted to English-language articles. Additionally, a manual search in the major oral surgery journals and books was performed. The aim of this article is to examine the evolution of third molar surgery, recognize pioneering techniques, and compare these techniques to current approaches. Common approaches employed today are discussed and treatment philosophies with thoughts for future therapies are provided.