Loss Of Bony Support Research Articles

Alveolar bone defects in adults reporting for orthodontic treatment - A CBCT study

Identifying alveolar bony fenestration and dehiscence preceding orthodontic treatment, especially arch expansion, is needed. An unrevealed and undiagnosed buccal alveolar bone defect leads to treatment relapse and further loss of bony support. The aim of this study was to determine the extent of posterior alveolar bony dehiscence and fenestration in adults undergoing orthodontic treatment. A total of 20 subjects in the age range 18-35 years were selected for this study randomly and their CBCT records were retrieved from the Department of Orthodontics, Saveetha dental college. All statistical analysis was performed using SPSS. Chi-square test was used to determine the association of extent of fenestrations and dehiscence between males and females. Females presented with wider and extensive dehiscence defects than males (p=0.019, p<0.05). On the other hand, there was a statistically non-significant association of fenestration severity between males and females. (p=0.178, p>0.05) Within the limits of this study, it was observed that females presented with more severe bony alveolar dehiscence than males.

Characterization of Human Anterosuperior Acetabular Depression in Correlation With Labral Tears.

Background:Labral tears often occur in the same quadrant of the acetabulum at a small depression previously referred to as the psoas valley. Understanding the anatomic variations of this depression could help us understand the etiology of labral tears.Purpose:To describe the location and dimensions of the depression located in the anterosuperior acetabular rim. The hypothesis was that the location of this depression would be consistent with the common location of acetabular labral tears described in the literature.Study Design:Controlled laboratory study.Methods:A total of 240 pelvic specimens were divided into 2 groups (n = 120 for each) according to age (younger age group: 21.36 ± 3.12 years [range, 14-24 years]; older age group: 42.30 ± 10.27 years, [range, 25-60 years]).Specimens were also categorized based on sex (mean age: 31.93 ± 12.31 years [male]; 32.08 ± 13.66 years [female]) and race (mean age: 31.45 ± 13.16 years [black]; 32.57 ± 12.82 years [white]). The depth and width of the acetabular depression were measured using a digital caliper, and the location was measured using a goniometer.Results:The psoas valley was observed in every specimen and was located in the anterosuperior quadrant of the acetabulum. Its depth was significantly greater (P < .001) in males (5.35 ± 1.60 mm) than in females (3.95 ± 1.31 mm). The width of the psoas valley was also greater (P < .001) in males (29.39 ± 3.98 mm) than in females (24.49 ± 4.80 mm). There were no differences in size or location of the depression between races or age groups. The psoas valley was located between 3.92 ± 0.42 o’clock anteriorly and 2.12 ± 0.77 o’clock posteriorly.Conclusion:The differences observed in the study data are believed to be a result of the different anatomic morphologies of the pelvis in males and females. This loss of bony support, caused by the depression, could be the underlying cause of weakening of the acetabular labrum as people age.Clinical Relevance:The loss of bony support in the anterosuperior acetabular depression could contribute to the labral tears that commonly occur in this area. Understanding the normal anatomy of this area could be important in determining the risk of labral tears as well as treatment options.

Pincer nails complicated by distal phalangeal osteomyelitis

Besides the known cosmetic implications, pincer nails are often complicated by pain, chronic inflammation and recurrent suppurative infections. We report two such cases of chronic paronychia of the thumb secondary to pincer nails. Both were complicated by osteomyelitis. Although both cases eventually healed after excisional debridement, one case required elective amputation because the significant loss of bony support resulted in a painful, floppy fingertip and poor pinch. Regular radiographic assessments may be useful in the management of patients with chronic inflammation or recurrent paronychias secondary to pincer nails to detect osteomyelitis.

Decompression of large periapical cystic lesions

The removal of extensive periapical cystic lesions by surgical enucleation frequently causes postsurgical sequelae, such as devitalization of adjacent teeth, patient apprehension and discomfort, loss of bony support and, on occasion, paresthesia. An alternative approach is presented, whereby a tube is inserted into the cystic cavity. This tube is then periodically reduced in length as the lesion heals.