Muhammad Asif Khan, Muhammad Adnan, Faisal Mansor.
Frequency and factors responsible for the formation of oroantral communication during extraction of the maxillary posterior teeth.
Pak Oral Dental J Jan ;37(3):411-5.
The objective of this study was to determine the frequency of oroantral communication (OAC) during extraction of the maxillary posterior teeth and to find out the risk factors responsible for this iatrogenic abnormal communication. The tract epithelizes with time and become a fistula then (oroantral fistula, a non self healing condition with disastrous complications. Two hundred patients requiring maxillary posterior teeth extractions and having age range from 20 to 60 years were included in this study. Patients having any pathology in maxillary sinus or requiring prophylactic extraction before radiotherapy were excluded from the study. Name, age, gender, occupation, quadrant in which extraction was done, extracting tooth and technique of extraction (open or closed) were recorded. Data were analyzed using Statistical Package for Social Sciences (SPSS) version 20.0. Descriptive statistics were calculated. Chi- square test was applied to see the effect of risk factors on oroantral communication. In general females were more in number than males in this study. The mean age was 33.7±8.96 years. The mean sinus proximity to the extracting tooth was 1.46±2.03mm. In 18(9%) of patients sinus perforation occurred. The most common tooth involved in sinus perforation was maxillary 1st permanent molar(n=16, 8%) followed by maxillary 2nd permanent molar (n=2, 1%) (p value=0.012). The effect of extraction technique (open or closed) was not statistically significant (p value=0.065). The effect of root morphology and age on formation of oroantral communication was statistically significant (P<0.05). More males (n=12) than females (n=6) were affected by oroantral communication (OAC) (p value=0.031). Increase in age, male gender, abnormal root morphology (increased length, excessive bulbosity or divergent roots), sinus proximity to root apices and upper first molar are the responsible factors for OAC formation.
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