Residual bone height measured by panoramic radiography in older edentulous Korean patients

Abstract

PURPOSE. The aim of this study was to obtain statistical data on the residual bone height at different natural tooth positions by panoramic radiography in edentulous Korean patients aged 60-90 years. MATERIALS AND METHODS. The study included the diagnostic panoramic radiographs of 180 randomly selected edentulous patients without systemic diseases affecting bone. The radiographic selection criteria included absence of obvious facial asymmetry, clearly visible anatomic structures, and no surgical and fracture history. The panoramic radiographs of 79 patients met these criteria and were used in the analysis. The same researcher processed all the radiographs by using a standardized method. The height of the residual bone was measured at 18 predetermined sites (7 in the maxilla and 11 in the mandible) on digitized and printed radiographs by using a Digimatic caliper, triangle, and ruler. Gender-and age-related differences were statistically analyzed by using the t-test and rank-sum test (α=0.05). RESULTS. The maxillary residual bone height did not show significant genderrelated differences, but male patients had significantly higher residual bone in the mandible(P<.05). No significant height differences at the measured sites were noted among the 60s, 70s, and 80s age groups. CONCLUSION. Dentists should pay greater attention to older female edentulous patients because they are more prone to rapid residual bone resorption. Residual bone resorption may not be affected by age.

Mandibular residual ridge height in relation to age, gender and duration of edentulism in a Saudi population: A clinical and radiographic study

“…Therefore, gender of patients involved in this study had a significant effect on the mandibular bone height. This finding is supported by other studies that reported a greater bone resorption in women than men (Al-Jabrah and Al-Shumailan, 2014, Liang et al, 2014). Vaishnav et al (2010) also reported resorption of the wall of mandibular canal that was more in edentulous women than men due to hormonal reasons.…”

“…In older age groups (over 60 years of age), the progression of mandibular resorption in relation to duration of edentulism was faster than in a younger age group (40 to 60 years) (Jayaram and Shenoy, 2017). Furthermore, gender plays an important role in RRR, where a greater bone resorption was reported in women than men (Al-Jabrah and Al-Shumailan, 2014, Liang et al, 2014). Among the nutritional factors, the degree of absorption of calcium, phosphorous and proteins influences the growth and maintenance of bone (Gupta et al, 2010).…”

Relationship between vertical mandibular bone atrophy and the number of remaining teeth in elderly Indonesian individuals

“…In contrast, no difference was found between the age groups in terms of the mandibular bone height. This finding is in line with a previous study [22]. Some investigators have shown that in healthy elderly patients, age alone does not lead to the critical loss of periodontal support.…”

3-dimensional reconstruction of mandibular canal at the interforaminal region using micro-computed tomography in Korean

“…The combined value was approximately 21 mm similar to the value of Liang et al's study. 1 The distance from the superior border of the mandibular canal to the cementoenamel junction was approximately 19 mm. 22 Therefore, it was thought that the height of alveolar bone above the mental foramen was only about 10 mm in normal patient without periodontal diseases.…”

“…In particular, the mandible has a much faster absorption rate than the maxilla, and the residual bone height in posterior mandible is insufficient for implant placement compared with that of anterior mandible. 1 Therefore, in a severely atrophied mandible, it is recommended to be treated with complete removable prostheses with a two-implant-supported overdenture which is placed between the mental foramen. 2…”