A Longitudinal Study of the Presence of Dental Anomalies in the Primary and Permanent Dentitions of Cleft Lip and/or Palate Patients

2017 ◽  
Vol 54 (3) ◽  
pp. 309-320 ◽  
Author(s):  
Akira Suzuki ◽  
Masayuki Nakano ◽  
Keigo Yoshizaki ◽  
Atsushi Yasunaga ◽  
Naoto Haruyama ◽  
...  
Keyword(s):  
Longitudinal Study ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Permanent Dentition ◽  
Primary Dentition ◽  
University Hospital ◽  
Dental Anomalies ◽  
Males And Females ◽  
The Right ◽  
Maxillary Dentition

Objective The aim is to survey primary and permanent dental anomalies: hypodontia, microdontia, a supernumerary tooth, and fused teeth in patients with cleft lip and/or palate. Design Retrospective longitudinal study Subjects The subjects were selected from all 1724 patients with cleft lip and/or palate who were registered at the orthodontic clinic of Kyushu University Hospital, Fukuoka, Japan, from 1970 to 2009. Finally, 994 subjects were evaluated for primary dentition, 1352 for permanent dentition, and 871 for the longitudinal changes from primary to permanent dentition. Methods The prevalence of dental anomalies was compared for each tooth type, among various cleft types, between males and females, and between the alveolar cleft area and the noncleft area. Results The prevalence of hypodontia was 16.2% for primary dentition and 52.7% for permanent dentition in the subjects with cleft lip and/or palate. Hypodontia increased with the severity of the cleft type. Multiple hypodontia was found more frequently in the subjects with bilateral cleft lip and palate and the subjects with unilateral cleft lip and palate. Microformed lateral incisors were found in 22.7% of permanent lateral incisors but not in primary dentition. Supernumerary teeth were found in 17.7% of the subjects with cleft lip and/or palate for primary maxillary dentition and in 5.7% for permanent maxillary dentition. Conclusion The prevalence of hypodontia was greater in permanent dentition than in primary dentition; although, it was not much different between males and females or between the right and left sides. The prevalence of dental anomalies was significantly different among four groups by cleft type: cleft lip, cleft lip and alveolus, cleft lip and palate, and cleft palate.

scholarly journals Longitudinal Study of Effect of Hotz's Plate and Lip Adhesion on Maxillary Growth in Bilateral Cleft Lip and Palate Patients

2012 ◽  
Vol 49 (2) ◽  
pp. 230-236 ◽  
Author(s):  
Muhammad Syafrudin Hak ◽  
Masaaki Sasaguri ◽  
Farida Kamil Sulaiman ◽  
Enny Tyasandarwati Hardono ◽  
Akira Suzuki ◽  
...  
Keyword(s):  
Longitudinal Study ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Maxillofacial Surgery ◽  
University Hospital ◽  
Dental Arch ◽  
Prospective Longitudinal Study ◽  
Bilateral Cleft Lip ◽  
Maxillary Growth ◽  
Prospective Longitudinal

Objective To investigate the effects of infant orthopedic treatment and lip adhesion on maxillary growth of patients with bilateral cleft lip and palate (BCLP). Design Prospective longitudinal study. Setting The present study was conducted at the Cleft Lip and Palate Center, Harapan Kita Children and Maternity Hospital, Indonesia, and the Department of Oral and Maxillofacial Surgery, Kyushu University Hospital, Japan. Subjects The study sample consisted of 53 patients with complete BCLP and 10 noncleft patients with other diseases. Patients with BCLP were divided into three groups: H (-), 11 patients treated without Hotz's plate; H (+), 24 treated with Hotz's plate; and LA-H, 18 treated with lip adhesion and Hotz's plate. Methods Serial dental casts were obtained from each BCLP child at the following four time points: first visit, labioplasty, palatoplasty, and 5 years of age. Each maxillary dental cast was scanned, and the linear and angular dimensions were measured. Results and Conclusion Lip adhesion showed a temporary negative effect. In all patients with BCLP, the surgeries affected the growth of the anterior arch width until the age of 5 years. Collapse of the premaxilla following labioplasty in the H (-) group affected the growth of dental arch length until the age of 5 years. Treatment using Hotz's plate prevented collapse of the premaxilla, and the growth of the arch length was comparable to that observed in the noncleft group.

Prevalence of Abnormalities in Dental Structure, Position, and Eruption Pattern in a Population of Unilateral and Bilateral Cleft Lip and Palate Patients

2008 ◽  
Vol 45 (2) ◽  
pp. 154-162 ◽  
Author(s):  
Chiara Tortora ◽  
Maria C. Meazzini ◽  
Giovanna Garattini ◽  
Roberto Brusati
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Permanent Dentition ◽  
Dental Development ◽  
Surgical Trauma ◽  
Dental Anomalies ◽  
Supernumerary Teeth ◽  
Bilateral Cleft Lip ◽  
Maxillary Premolars ◽  
Maxilla And Mandible

Objective: To evaluate the dental characteristics of patients subjected to a protocol that included early secondary gingivoalveoloplasty (ESGAP). Design: Panoramic radiographs of 87 patients with unilateral cleft lip and palate (UCLP) and 29 with bilateral cleft lip and palate (BCLP) were evaluated. Missing and supernumerary teeth were also quantified on the cleft and noncleft side and in the maxilla and mandible. Crown and root malformations and tooth rotations were quantified. A subsample in permanent dentition was extrapolated to analyze canine eruption patterns. Results: A total of 48.8% of the UCLP patients presented with missing permanent lateral incisors in the cleft area and 6.1% contralaterally. A total of 4.9% presented with missing second maxillary premolars on the cleft site and 1.2% contralaterally. A total of 7.3% presented with supernumerary lateral incisors, and 45% of the BCLP cleft sites presented with missing lateral incisors, while 25% of the cleft sites presented second maxillary premolars agenesis. Five percent of the cleft sites presented with supernumerary lateral incisors. Evaluation of the subsample in permanent dentition showed that 15.5% had a canine retention and 4.4% of the canines had to be surgically exposed. A significant association was observed between canine inclination and retention but not with absence of the lateral incisor. Conclusions: The frequency of dental anomalies in this sample was similar to other cleft populations. As surgical trauma has been suggested to damage forming teeth, the results of this study indicated that ESGAP has no detrimental influence on subsequent dental development.

scholarly journals Dental anomalies in children with cleft lip and palate in Western Australia

2016 ◽  
Vol 10 (02) ◽  
pp. 254-258 ◽  
Author(s):  
Wendy Nicholls
Keyword(s):  
Western Australia ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
X Rays ◽  
Dental Anomalies ◽  
Dental Patients ◽  
Bilateral Cleft Lip ◽  
Males And Females ◽  
The Mean ◽  
Dental Records

ABSTRACT Objective: The purpose of this paper was to describe the prevalence and type of dental anomalies in the primary and permanent dentition in children with a cleft condition at Princess Margaret Hospital in Perth, Western Australia. Materials and Methods: The details of 162 current dental patients extracted from the main dental database through their year of birth for the period 1998–2001 were selected consecutively. Dental records and X-rays were examined by one examiner (WN) and verified by a second examiner (RB) to determine dental development. The mean age of the subjects was 10.8 years with equal numbers of males and females. Subjects were further divided into cleft type; unilateral cleft lip (UCL) and palate, bilateral cleft lip (BCL) and palate, UCL, BCL, and cleft palate. Results: One hundred sixty-two subjects were grouped into 21 categories of anomaly or abnormality. Prevalence rates for the categories were calculated for the overall group and for gender and cleft type. Conclusion: Overall, 94% of patients were found to have at least one dental anomaly, with fifty-six (34%) patients having more than one anomaly or abnormality.

Distribution Patterns of Primary and Permanent Dentition in Children with Unilateral Complete Cleft Lip and Palate

1998 ◽  
Vol 35 (2) ◽  
pp. 154-160 ◽  
Author(s):  
Tzong-Ping Tsai ◽  
Chiung-Shing Huang ◽  
Chuan-Chuan Huang ◽  
Lai-Chu See
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Distribution Patterns ◽  
Permanent Dentition ◽  
Primary Dentition ◽  
Lateral Incisor ◽  
Permanent Teeth ◽  
Alveolar Cleft ◽  
Maxillary Lateral Incisor ◽  
Numerical Variation

Objective To investigate the distribution patterns of primary and permanent teeth in the cleft area and the numerical variation in teeth in unilateral complete cleft lip and palate (UCLP) patients. Design A survey of the dentition in UCLP patients. Setting Craniofacial Center, Chang Gung Memorial Hospital, Taipei, Taiwan. Patients 137 UCLP patients who met the following criteria: (1) have had at least one panoramic film taken, (2) the first panoramic film illustrates either primary or early mixed dentition. Evaluation of both permanent and primary dentition was available in 91 cases. Main Outcome Measures Two evaluators performed independent evaluations of number and distribution of teeth in UCLP patients. The hypothesis that there are two odontogenic origins for maxillary lateral incisors was proposed to explain the occurrence of distribution patterns of dentition in the cleft area and to explain differences between primary and permanent dentition in UCLP patients. Results Four distribution patterns in the cleft area were identified in both the primary and the permanent dentition. In the primary dentition, placement of the lateral incisor distal to the alveolar cleft was the predominant pattern (pattern y, 82.4%), followed by absence of the cleft side maxillary lateral incisor (pattern ab, 9.9%), presence of one tooth on each side of the alveolar cleft (pattern xy, 5.5%), and placement of the lateral incisor mesial to the alveolar cleft (pattern x, 2.2%). In the permanent dentition, the most common pattern was the absence of the maxillary lateral incisor on the cleft side (pattern AB, 51.8%), followed by lateral incisor placement distal to the alveolar cleft (pattern Y, 46%), lateral incisor placement mesial to the alveolar cleft (pattern X, 1.5%) and the presence of one tooth on each side of the alveolar cleft (pattern XY, 0.7%). The discrepancy between the distribution patterns of primary dentition and permanent dentition successors is 57.1%. Variations in tooth number in both primary and permanent dentition of UCLP patients occurred most often in the cleft area. Abnormalities in the number of teeth (hypodontia or hyper-dontia) outside the cleft area were more common in the permanent dentition than in the primary dentition (24.1% versus 4.4%). Conclusions Four distribution patterns in the cleft area were identified in both sets of dentition. Our findings of distribution patterns in UCLP patients support the hypothesis that there may be two odontogenic origins for maxillary lateral incisors. Clinicians involved in managing the dentition of UCLP patients should consider the high frequency of numerical variation both in and outside the cleft area before starting dental treatment.

scholarly journals Standar Normatif Analisis Sefalograf Postero-Anterior Sub Ras Jawa Indonesia

2016 ◽  
Vol 19 (2) ◽  
pp. 98
Author(s):  
Cendrawasih Andusyana Farmasyanti ◽  
Darmawan Sutantyo ◽  
Sari Karuniawati
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Transverse Dimension ◽  
Facial Aesthetics ◽  
Average Width ◽  
Ethical Approval ◽  
The Face ◽  
Males And Females ◽  
The Right ◽  
Normal Standard

Latar Belakang. Pasien dengan kelainan asimetri wajah termasuk diantarnya adalah pasien dengan celah bibir dan lelangit memerlukan analisis cefalometri postero-anterior. Tujuan Penelitian. Penelitian pendahuluan ini dilakukan untuk memperoleh standar normal analisis dimensi transversal wajah pada sefalograf postero-anterior orang Jawa serta mengetahui apakah terdapat perbedaan intra dan inter gender. Cara Penelitian. Sampel terdiri dari 30 orang terdiri dari 24 perempuan dan 6 laki-laki yang beretnis Jawa. Subyek adalah individu dengan estesis dan oklusi wajah yang baik, usia 18-30. Hubungan molar klas I dalam variasinya. Setiap subyek di ambil sefalograf postero anterior untuk diukur lebar dimensi transversal landmark dari Broadbent. Penelitian telah mendapatkan ethical approval. Hasil Penelitian. Setelah dilakukan pengujian statistic Wilcoxon, hanya Bi-Zygomatic(Bi-Zyg) yang berbeda bermakna (p<0,05), kanan 66,33 dan kiri 65,28 pada wanita dan Bi-Maxillary(Bi-Mx) kiri 36,31, kanan 34,27 pada laki-laki. Lebar rata-rata pada satu sisi wajah, berturut-turut laki-laki dan perempuan dalam mm adalah Bi-Latero orbitale (Bi-Lo): 45,99 dan 49,51; Bi-Maxillary (Bi-Mx): 33,04 dan 35,29; Bi-Lateronasal (Bi-Ln): 16,6 dan 18,07; Bi-Condylar (Bi-Cond): 50,66 dan 56,08; dan Bi-Gonial (Bi-Go): 44,27 dan 47,59. Uji beda antar gender, Mann Whitney U, dijumpai laki-laki lebih besar bermakna daripada perempuan kecuali lebar Bi-Zyg (p<0,05). Kesimpulan. Lebar Bi-Zyg perempuan dan Bi-M laki-laki pada sisi kiri lebih besar bermakna (p<0,05) daripada sisi kanan. Lebar semua variabel kecuali Bi-Zyg lebih besar bermakna dibandingkan perempuan (p<0,05). Background. Patient with skeletal disorders such as cleft lip and palate patients need a normal standard anteroposterior cephalometric analysis. Aim. The preliminary research was conducted to obtain a normal standard dimensional analysis of Javanese postero-anterior transverse facial cephalography and determined whether there were differences in intra-and inter-gender. Method. The sample consisted of 30 Javanese people, consisting of 24 females and 6 males. Subjects are individuals with good facial aesthetics and occlusion, aged 18-30. The molar relationship were in Class I and its variation. Each subject was taken their postero anterior sefalograph to measure the width of the transverse dimension base on the Broadbent landmarks and has esthically approved. Result. The width of the left side tend to be larger than the right (mm) but only Bi-zygomatic (Bi-Zyg) were significantly different (p<0.05), 66.33 and 65.28 for female and Bi-maxillary (Bi-Mx) 36.31 and 34.27 for males after Wilcoxon statistical test. Average width of the left side of the face, males and females in mm respectively are Bi-Latero orbitale (Bi-Lo): 45.99 and 49.51; Bi-maxillary (Bi-Mx): 33.04 and 35.29; Bi-Lateronasal (Bi-Ln): 16.6 dan 18.07; Bi-Condylar (Bi-Cond): 50.66 and 56.08; and Bi-Gonial (Bi-Go): 44.27 and 47.59. Mann-Whitney U, found that males are significantly greater than females except the width of the Bi-Zyg (p<0.05). Conclusion. Bi Zyg- Bi-Mx width in woman and men on the left side are significantly greater (p<0.05) than the rght side. The width of all variables except Bi-Zyg are significantly larger than females (p<0.05).

scholarly journals Maxillary Arch Dimensions in 6-Year-Old Cleft Children in Northern Finland: A Cross-Sectional Study

2021 ◽  
Vol 18 (14) ◽  
pp. 7432
Author(s):  
Mirjami Corcoran ◽  
Saujanya Karki ◽  
Leena Ylikontiola ◽  
Riitta Lithovius ◽  
George Sándor ◽  
...  
Keyword(s):  
Cleft Palate ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Cross Sectional Study ◽  
University Hospital ◽  
Cross Sectional ◽  
Significant Difference ◽  
Student’S T ◽  
The Right ◽  
Maxillary Arch

The aim was to cross-sectionally examine the maxillary arch dimensions in 6-year-old children with cleft lip and/or palate and to compare them with the initial cleft sizes among patients with cleft palate. The study included 89 patients with clefts treated at the Oulu University Hospital. The subjects were divided into three groups: cleft palate, cleft lip, and cleft lip and palate. Study casts were scanned, and the maxillary arch dimensions were examined using a 3D program (3Shape Orthoanalyzer, Copenhagen, Denmark). The statistical methods Student’s t-test and one-way ANOVA were used to compare the means (SD) between the groups. Spearman’s correlation coefficient was used to determine the correlation between cleft severity and maxillary dimensions. A significant difference was found between different initial cleft sizes in terms of distance between the second deciduous molar and the first incisor on the right side. The intermolar width showed a negative correlation with the initial cleft size. The dimensions were shorter for clefts affecting the palate and largest for clefts affecting only the lip. Larger clefts resulted in a shorter maxilla on the right side. Many dimensions became shorter when the initial cleft was larger. Clefts of the palate resulted in smaller maxillas.

EVALUATION OF OCCURRENCE OF HYPERDONTIA IN NON-SYNDROMIC POPULATION FROM BIHAR REGION

2019 ◽  
Vol 3 (10) ◽  
Author(s):  
Dr. Minti Kumari ◽  
Dr. Madhuri Kumari ◽  
Dr Anurag Rai ◽  
Dr. Navin Kumar
Keyword(s):  
Panoramic Radiograph ◽  
Permanent Dentition ◽  
Dental Anomalies ◽  
Supernumerary Teeth ◽  
Panoramic Radiographs ◽  
Future Studies ◽  
Asian Populations ◽  
Males And Females ◽  
The Individual ◽  
Clinical Records

It is evident that hyperdontia is more common in the permanent dentition than in the primary. There is a considerable difference between males and females in the prevalence of these teeth in permanent dentition; hyperdontia is twice as common in males as in females. However, this approximation varies in terms of location, other associating syndromes that may be present, and the ethnicity of the individual. In terms of ethnicity, it can be seen that hyperdontia is in fact less common in Caucasian than in Asian populations. There is evidence to show that an individual is more likely to have hyperdontia if other members of their family also have the condition. Hence the present study was planned for evaluation of occurrence of hyperdontia in non-syndromic  population from Bihar Region. The present study was planned in Public Health Dentistry, Patna Dental College and Hospital, Patna, Bihar. Total 195 patients referred to Department of Dentistry were evaluated in the present study. Panoramic radiographs and clinical records of patients above the age of 18 years and without any syndromic features were selected for the study.  All the radiographs were examined for the presence of supernumerary teeth, their location, morphology, and number. Morphologically, teeth were classified as conical, tuberculate, supplemental, and odontoma. Early diagnosis of dental anomalies can prevent some esthetic, orthodontic, and periodontal problems, and knowledge of the prevalence and distribution of the anomalies may help clinicians to the detection of these anomalies at early stages. Our study evaluated the prevalence of selected dental anomalies; future studies should investigate the prevalence of dental anomalies of all types. Keywords: Hyperdontia, non-syndromic, panoramic radiograph, supernumerary teeth, etc.

Craniofacial Morphology in Children with Complete Bilateral Cleft Lip and Palate: Does Infantile Size of the Premaxilla Predetermine Outcome?

2004 ◽  
Vol 41 (4) ◽  
pp. 410-415 ◽  
Author(s):  
Yu-Fang Liao ◽  
Chiung-Shing Huang ◽  
Ya-Yu Tsai ◽  
M. Samuel Noordhoff
Keyword(s):  
Retrospective Study ◽  
Outcome Measures ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Craniofacial Morphology ◽  
University Hospital ◽  
Cephalometric Analysis ◽  
Bilateral Cleft Lip ◽  
Dental Cast ◽  
Craniofacial Characteristics

Objective To evaluate the possible association between the size of the premaxilla in infants and craniofacial morphology in children with complete bilateral cleft lip and palate (CBCLP) and identify the characteristics of craniofacial morphology in children with CBCLP with median facial dysplasia (MFD). Design Retrospective study. Setting A university hospital craniofacial center. Subjects Thirty-four patients with nonsyndromic CBCLP, 24 boys and 10 girls, had large premaxilla (LP group). Thirty-six patients with nonsyndromic CBCLP, 16 boys and 20 girls, had small premaxilla (SP group). Thirteen CBCLP patients with MFD, five boys and eight girls (MFD group). Main Outcome Measures Infant maxillary dental cast at the age of 1 year was used to measure the size of the premaxilla. Cephalometric analysis was used to determine craniofacial morphology in children at the age of 5 years. Results The size of the premaxilla in infants with CBCLP varied greatly. The LP group tended to have a longer maxilla and a more protruded maxilla, producing a better interjaw relation. The opposite phenomena were observed in the MFD group; the SP group yielded results between those of the LP and the MFD groups. Conclusion The size of the premaxilla in infants with CBCLP can be used to predetermine subsequent craniofacial morphology at the age of 5 years. Children with nonsyndromic CBCLP had craniofacial characteristics that differed significantly from those of children with CBCLP with median facial dysplasia.

Secondary Dentition Characteristics in Children With Nonsyndromic Unilateral Cleft Lip and Palate

2018 ◽  
Vol 55 (4) ◽  
pp. 582-589 ◽  
Author(s):  
Elaine Li Yen Tan ◽  
Meaw Charm Kuek ◽  
Hung Chew Wong ◽  
Serene Ai Kiang Ong ◽  
Mimi Yow
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Permanent Teeth ◽  
Tooth Size ◽  
Dental Anomalies ◽  
Supernumerary Teeth ◽  
High Prevalence ◽  
Dental Records ◽  
Congenitally Missing ◽  
Maxillary Region

Objective: Children with cleft lip and palate are reported to be commonly associated with higher prevalence of dental anomalies such as hypodontia, supernumeraries, and abnormalities in tooth size, shape, and position. This study investigated the prevalence of dental anomalies in a longitudinal cohort of children with unilateral cleft lip and palate (UCLP). Design: The study was a retrospective analysis of radiographs, study models, and treatment notes. Patients: Sixty patients with repaired UCLP aged 13 years old with complete dental records dating from 5 years of age were included. Methods: Study casts, dental panoramic, anterior maxillary occlusal, and periapical radiographs of the patients were examined for cleft-sidedness, congenitally missing permanent teeth, supernumerary teeth, microdontic, and macrodontic teeth in the anterior maxillary region, presence of malformed permanent cleft-sided lateral incisor and its morphology (peg-shaped, conical shaped, canine-formed), positions of the permanent lateral incisors relative to the cleft side and presence of rotated cleft-sided central incisors. Results: Of the 60 patients studied, 63.3% had hypodontia, 21.7% had supernumerary teeth, 69.6% had microdontia, and 12.5% had macrodontia. All of the cleft-sided permanent lateral incisors had associated anomalies, with a large proportion (43.1%) missing; and when present in 31 subjects, the majority (90.3%) was positioned distal to the cleft. Most of the cleft-sided permanent central incisors were rotated if present, and prevalent at 86.7%. Conclusion: A high prevalence of dental anomalies was observed in this sample of children with UCLP.

Morphological Presentation of Orofacial Clefts: An Epidemiological Study of 5004 Patients in a Tertiary Care Hospital of Central India

2021 ◽  
pp. 105566562110577
Author(s):  
Jaideep Singh Chauhan ◽  
Sarwpriya Sharma
Keyword(s):  
Cleft Palate ◽  
Epidemiological Study ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Tertiary Care ◽  
Central India ◽  
Care Hospital ◽  
Orofacial Clefts ◽  
Chi Square ◽  
The Right

Objective: To analyse the morphological presentation of orofacial clefts, gender, syndromes and systemic anomalies associated with them. Design: This was an epidemiological study performed in the patients who were registered for cleft lip and palate surgeries in our centre. The data was evaluated both retrospectively as well as prospectively. Patients/ Participants: The patients registered from November 2006 to April 2021 were studied. Out of 5276 patients, data of 5004 cases were analysed, rest 272 patients were excluded due to lack of information. Statistical analysis and Chi square test were applied. Results: Cleft deformities were more common in males than females. Cleft lip with palate was the commonest phenotype (52.2%). It was followed by isolated cleft lip (22.9%), isolated cleft palate (22.1%), rare clefts (1.62%) and syndromic clefts (1.18%). Unilateral variants were more frequent than bilateral. In unilateral, left side was more common than the right side. Among bilateral, most of the cases had premaxillary protrusion. In the present study, 3.46% of all the patients had associated anomalies affecting their other organs. Less common cleft phenotypes like microform cleft lip and submucous cleft palate ± bifid uvula showed frequency of 0.62% and 0.64% respectively. Conclusion: Thorough examination of cleft deformity should be done as it may appear as an isolated deformity or part of a syndrome and have associated systemic anomalies. This may help us to deliver comprehensive care to the patients and can prevent potential operative complications.

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